remove libz.

It was unloved and unwanted, and buggy.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>

sys/src/cmd/gs/zlib/algorithm.txt

@@ -1,209 +0,0 @@
-1. Compression algorithm (deflate)
-
-The deflation algorithm used by gzip (also zip and zlib) is a variation of
-LZ77 (Lempel-Ziv 1977, see reference below). It finds duplicated strings in
-the input data.  The second occurrence of a string is replaced by a
-pointer to the previous string, in the form of a pair (distance,
-length).  Distances are limited to 32K bytes, and lengths are limited
-to 258 bytes. When a string does not occur anywhere in the previous
-32K bytes, it is emitted as a sequence of literal bytes.  (In this
-description, `string' must be taken as an arbitrary sequence of bytes,
-and is not restricted to printable characters.)
-
-Literals or match lengths are compressed with one Huffman tree, and
-match distances are compressed with another tree. The trees are stored
-in a compact form at the start of each block. The blocks can have any
-size (except that the compressed data for one block must fit in
-available memory). A block is terminated when deflate() determines that
-it would be useful to start another block with fresh trees. (This is
-somewhat similar to the behavior of LZW-based _compress_.)
-
-Duplicated strings are found using a hash table. All input strings of
-length 3 are inserted in the hash table. A hash index is computed for
-the next 3 bytes. If the hash chain for this index is not empty, all
-strings in the chain are compared with the current input string, and
-the longest match is selected.
-
-The hash chains are searched starting with the most recent strings, to
-favor small distances and thus take advantage of the Huffman encoding.
-The hash chains are singly linked. There are no deletions from the
-hash chains, the algorithm simply discards matches that are too old.
-
-To avoid a worst-case situation, very long hash chains are arbitrarily
-truncated at a certain length, determined by a runtime option (level
-parameter of deflateInit). So deflate() does not always find the longest
-possible match but generally finds a match which is long enough.
-
-deflate() also defers the selection of matches with a lazy evaluation
-mechanism. After a match of length N has been found, deflate() searches for
-a longer match at the next input byte. If a longer match is found, the
-previous match is truncated to a length of one (thus producing a single
-literal byte) and the process of lazy evaluation begins again. Otherwise,
-the original match is kept, and the next match search is attempted only N
-steps later.
-
-The lazy match evaluation is also subject to a runtime parameter. If
-the current match is long enough, deflate() reduces the search for a longer
-match, thus speeding up the whole process. If compression ratio is more
-important than speed, deflate() attempts a complete second search even if
-the first match is already long enough.
-
-The lazy match evaluation is not performed for the fastest compression
-modes (level parameter 1 to 3). For these fast modes, new strings
-are inserted in the hash table only when no match was found, or
-when the match is not too long. This degrades the compression ratio
-but saves time since there are both fewer insertions and fewer searches.
-
-
-2. Decompression algorithm (inflate)
-
-2.1 Introduction
-
-The key question is how to represent a Huffman code (or any prefix code) so
-that you can decode fast.  The most important characteristic is that shorter
-codes are much more common than longer codes, so pay attention to decoding the
-short codes fast, and let the long codes take longer to decode.
-
-inflate() sets up a first level table that covers some number of bits of
-input less than the length of longest code.  It gets that many bits from the
-stream, and looks it up in the table.  The table will tell if the next
-code is that many bits or less and how many, and if it is, it will tell
-the value, else it will point to the next level table for which inflate()
-grabs more bits and tries to decode a longer code.
-
-How many bits to make the first lookup is a tradeoff between the time it
-takes to decode and the time it takes to build the table.  If building the
-table took no time (and if you had infinite memory), then there would only
-be a first level table to cover all the way to the longest code.  However,
-building the table ends up taking a lot longer for more bits since short
-codes are replicated many times in such a table.  What inflate() does is
-simply to make the number of bits in the first table a variable, and  then
-to set that variable for the maximum speed.
-
-For inflate, which has 286 possible codes for the literal/length tree, the size
-of the first table is nine bits.  Also the distance trees have 30 possible
-values, and the size of the first table is six bits.  Note that for each of
-those cases, the table ended up one bit longer than the ``average'' code
-length, i.e. the code length of an approximately flat code which would be a
-little more than eight bits for 286 symbols and a little less than five bits
-for 30 symbols.
-
-
-2.2 More details on the inflate table lookup
-
-Ok, you want to know what this cleverly obfuscated inflate tree actually
-looks like.  You are correct that it's not a Huffman tree.  It is simply a
-lookup table for the first, let's say, nine bits of a Huffman symbol.  The
-symbol could be as short as one bit or as long as 15 bits.  If a particular
-symbol is shorter than nine bits, then that symbol's translation is duplicated
-in all those entries that start with that symbol's bits.  For example, if the
-symbol is four bits, then it's duplicated 32 times in a nine-bit table.  If a
-symbol is nine bits long, it appears in the table once.
-
-If the symbol is longer than nine bits, then that entry in the table points
-to another similar table for the remaining bits.  Again, there are duplicated
-entries as needed.  The idea is that most of the time the symbol will be short
-and there will only be one table look up.  (That's whole idea behind data
-compression in the first place.)  For the less frequent long symbols, there
-will be two lookups.  If you had a compression method with really long
-symbols, you could have as many levels of lookups as is efficient.  For
-inflate, two is enough.
-
-So a table entry either points to another table (in which case nine bits in
-the above example are gobbled), or it contains the translation for the symbol
-and the number of bits to gobble.  Then you start again with the next
-ungobbled bit.
-
-You may wonder: why not just have one lookup table for how ever many bits the
-longest symbol is?  The reason is that if you do that, you end up spending
-more time filling in duplicate symbol entries than you do actually decoding.
-At least for deflate's output that generates new trees every several 10's of
-kbytes.  You can imagine that filling in a 2^15 entry table for a 15-bit code
-would take too long if you're only decoding several thousand symbols.  At the
-other extreme, you could make a new table for every bit in the code.  In fact,
-that's essentially a Huffman tree.  But then you spend two much time
-traversing the tree while decoding, even for short symbols.
-
-So the number of bits for the first lookup table is a trade of the time to
-fill out the table vs. the time spent looking at the second level and above of
-the table.
-
-Here is an example, scaled down:
-
-The code being decoded, with 10 symbols, from 1 to 6 bits long:
-
-A: 0
-B: 10
-C: 1100
-D: 11010
-E: 11011
-F: 11100
-G: 11101
-H: 11110
-I: 111110
-J: 111111
-
-Let's make the first table three bits long (eight entries):
-
-000: A,1
-001: A,1
-010: A,1
-011: A,1
-100: B,2
-101: B,2
-110: -> table X (gobble 3 bits)
-111: -> table Y (gobble 3 bits)
-
-Each entry is what the bits decode as and how many bits that is, i.e. how
-many bits to gobble.  Or the entry points to another table, with the number of
-bits to gobble implicit in the size of the table.
-
-Table X is two bits long since the longest code starting with 110 is five bits
-long:
-
-00: C,1
-01: C,1
-10: D,2
-11: E,2
-
-Table Y is three bits long since the longest code starting with 111 is six
-bits long:
-
-000: F,2
-001: F,2
-010: G,2
-011: G,2
-100: H,2
-101: H,2
-110: I,3
-111: J,3
-
-So what we have here are three tables with a total of 20 entries that had to
-be constructed.  That's compared to 64 entries for a single table.  Or
-compared to 16 entries for a Huffman tree (six two entry tables and one four
-entry table).  Assuming that the code ideally represents the probability of
-the symbols, it takes on the average 1.25 lookups per symbol.  That's compared
-to one lookup for the single table, or 1.66 lookups per symbol for the
-Huffman tree.
-
-There, I think that gives you a picture of what's going on.  For inflate, the
-meaning of a particular symbol is often more than just a letter.  It can be a
-byte (a "literal"), or it can be either a length or a distance which
-indicates a base value and a number of bits to fetch after the code that is
-added to the base value.  Or it might be the special end-of-block code.  The
-data structures created in inftrees.c try to encode all that information
-compactly in the tables.
-
-
-Jean-loup Gailly        Mark Adler
-jloup@gzip.org          madler@alumni.caltech.edu
-
-
-References:
-
-[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
-Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
-pp. 337-343.
-
-``DEFLATE Compressed Data Format Specification'' available in
-http://www.ietf.org/rfc/rfc1951.txt

sys/src/cmd/gs/zlib/compress.c

@@ -1,88 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2002 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id: compress.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-/* ===========================================================================
-     Compresses the source buffer into the destination buffer. The level
-   parameter has the same meaning as in deflateInit.  sourceLen is the byte
-   length of the source buffer. Upon entry, destLen is the total size of the
-   destination buffer, which must be at least 0.1% larger than sourceLen plus
-   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
-
-     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
-   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
-   Z_STREAM_ERROR if the level parameter is invalid.
-*/
-int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
-    Bytef *dest;
-    uLongf *destLen;
-    const Bytef *source;
-    uLong sourceLen;
-    int level;
-{
-    z_stream stream;
-    int err;
-
-    stream.next_in = (Bytef*)source;
-    stream.avail_in = (uInt)sourceLen;
-#ifdef MAXSEG_64K
-    /* Check for source > 64K on 16-bit machine: */
-    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-#endif
-    stream.next_out = dest;
-    stream.avail_out = (uInt)*destLen;
-    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
-
-    stream.zalloc = (alloc_func)0;
-    stream.zfree = (free_func)0;
-    stream.opaque = (voidpf)0;
-
-    err = deflateInit(&stream, level);
-    if (err != Z_OK) return err;
-
-    err = deflate(&stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        deflateEnd(&stream);
-        return err == Z_OK ? Z_BUF_ERROR : err;
-    }
-    *destLen = stream.total_out;
-
-    err = deflateEnd(&stream);
-    return err;
-}
-
-/* ===========================================================================
- */
-int ZEXPORT compress (dest, destLen, source, sourceLen)
-    Bytef *dest;
-    uLongf *destLen;
-    const Bytef *source;
-    uLong sourceLen;
-{
-    return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
-}
-
-/* ===========================================================================
-     If the default memLevel or windowBits for deflateInit() is changed, then
-   this function needs to be updated.
- */
-uLong ZEXPORT compressBound (sourceLen)
-    uLong sourceLen;
-{
-    return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
-}

sys/src/cmd/gs/zlib/crc32.c

@@ -1,342 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- *
- * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
- * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
- * tables for updating the shift register in one step with three exclusive-ors
- * instead of four steps with four exclusive-ors.  This results about a factor
- * of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
- */
-
-/* @(#) $Id: crc32.c,v 1.1.1.1 2005/04/24 21:39:37 giles Exp $ */
-
-/*
-  Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
-  protection on the static variables used to control the first-use generation
-  of the crc tables.  Therefore, if you #define DYNAMIC_CRC_TABLE, you should
-  first call get_crc_table() to initialize the tables before allowing more than
-  one thread to use crc32().
- */
-
-#ifdef MAKECRCH
-#  include <stdio.h>
-#  ifndef DYNAMIC_CRC_TABLE
-#    define DYNAMIC_CRC_TABLE
-#  endif /* !DYNAMIC_CRC_TABLE */
-#endif /* MAKECRCH */
-
-#include "zutil.h"      /* for STDC and FAR definitions */
-
-#define local static
-
-/* Find a four-byte integer type for crc32_little() and crc32_big(). */
-#ifndef NOBYFOUR
-#  ifdef STDC           /* need ANSI C limits.h to determine sizes */
-#    include <limits.h>
-#    define BYFOUR
-#    if (UINT_MAX == 0xffffffffUL)
-       typedef unsigned int u4;
-#    else
-#      if (ULONG_MAX == 0xffffffffUL)
-         typedef unsigned long u4;
-#      else
-#        if (USHRT_MAX == 0xffffffffUL)
-           typedef unsigned short u4;
-#        else
-#          undef BYFOUR     /* can't find a four-byte integer type! */
-#        endif
-#      endif
-#    endif
-#  endif /* STDC */
-#endif /* !NOBYFOUR */
-
-/* Definitions for doing the crc four data bytes at a time. */
-#ifdef BYFOUR
-#  define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
-                (((w)&0xff00)<<8)+(((w)&0xff)<<24))
-   local unsigned long crc32_little OF((unsigned long,
-                        const unsigned char FAR *, unsigned));
-   local unsigned long crc32_big OF((unsigned long,
-                        const unsigned char FAR *, unsigned));
-#  define TBLS 8
-#else
-#  define TBLS 1
-#endif /* BYFOUR */
-
-#ifdef DYNAMIC_CRC_TABLE
-
-local volatile int crc_table_empty = 1;
-local unsigned long FAR crc_table[TBLS][256];
-local void make_crc_table OF((void));
-#ifdef MAKECRCH
-   local void write_table OF((FILE *, const unsigned long FAR *));
-#endif /* MAKECRCH */
-
-/*
-  Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
-  x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
-
-  Polynomials over GF(2) are represented in binary, one bit per coefficient,
-  with the lowest powers in the most significant bit.  Then adding polynomials
-  is just exclusive-or, and multiplying a polynomial by x is a right shift by
-  one.  If we call the above polynomial p, and represent a byte as the
-  polynomial q, also with the lowest power in the most significant bit (so the
-  byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
-  where a mod b means the remainder after dividing a by b.
-
-  This calculation is done using the shift-register method of multiplying and
-  taking the remainder.  The register is initialized to zero, and for each
-  incoming bit, x^32 is added mod p to the register if the bit is a one (where
-  x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
-  x (which is shifting right by one and adding x^32 mod p if the bit shifted
-  out is a one).  We start with the highest power (least significant bit) of
-  q and repeat for all eight bits of q.
-
-  The first table is simply the CRC of all possible eight bit values.  This is
-  all the information needed to generate CRCs on data a byte at a time for all
-  combinations of CRC register values and incoming bytes.  The remaining tables
-  allow for word-at-a-time CRC calculation for both big-endian and little-
-  endian machines, where a word is four bytes.
-*/
-local void make_crc_table()
-{
-    unsigned long c;
-    int n, k;
-    unsigned long poly;                 /* polynomial exclusive-or pattern */
-    /* terms of polynomial defining this crc (except x^32): */
-    static volatile int first = 1;      /* flag to limit concurrent making */
-    static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
-
-    /* See if another task is already doing this (not thread-safe, but better
-       than nothing -- significantly reduces duration of vulnerability in
-       case the advice about DYNAMIC_CRC_TABLE is ignored) */
-    if (first) {
-        first = 0;
-
-        /* make exclusive-or pattern from polynomial (0xedb88320UL) */
-        poly = 0UL;
-        for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
-            poly |= 1UL << (31 - p[n]);
-
-        /* generate a crc for every 8-bit value */
-        for (n = 0; n < 256; n++) {
-            c = (unsigned long)n;
-            for (k = 0; k < 8; k++)
-                c = c & 1 ? poly ^ (c >> 1) : c >> 1;
-            crc_table[0][n] = c;
-        }
-
-#ifdef BYFOUR
-        /* generate crc for each value followed by one, two, and three zeros,
-           and then the byte reversal of those as well as the first table */
-        for (n = 0; n < 256; n++) {
-            c = crc_table[0][n];
-            crc_table[4][n] = REV(c);
-            for (k = 1; k < 4; k++) {
-                c = crc_table[0][c & 0xff] ^ (c >> 8);
-                crc_table[k][n] = c;
-                crc_table[k + 4][n] = REV(c);
-            }
-        }
-#endif /* BYFOUR */
-
-        crc_table_empty = 0;
-    }
-    else {      /* not first */
-        /* wait for the other guy to finish (not efficient, but rare) */
-        while (crc_table_empty)
-            ;
-    }
-
-#ifdef MAKECRCH
-    /* write out CRC tables to crc32.h */
-    {
-        FILE *out;
-
-        out = fopen("crc32.h", "w");
-        if (out == NULL) return;
-        fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
-        fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
-        fprintf(out, "local const unsigned long FAR ");
-        fprintf(out, "crc_table[TBLS][256] =\n{\n  {\n");
-        write_table(out, crc_table[0]);
-#  ifdef BYFOUR
-        fprintf(out, "#ifdef BYFOUR\n");
-        for (k = 1; k < 8; k++) {
-            fprintf(out, "  },\n  {\n");
-            write_table(out, crc_table[k]);
-        }
-        fprintf(out, "#endif\n");
-#  endif /* BYFOUR */
-        fprintf(out, "  }\n};\n");
-        fclose(out);
-    }
-#endif /* MAKECRCH */
-}
-
-#ifdef MAKECRCH
-local void write_table(out, table)
-    FILE *out;
-    const unsigned long FAR *table;
-{
-    int n;
-
-    for (n = 0; n < 256; n++)
-        fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : "    ", table[n],
-                n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
-}
-#endif /* MAKECRCH */
-
-#else /* !DYNAMIC_CRC_TABLE */
-/* ========================================================================
- * Tables of CRC-32s of all single-byte values, made by make_crc_table().
- */
-#include "crc32.h"
-#endif /* DYNAMIC_CRC_TABLE */
-
-/* =========================================================================
- * This function can be used by asm versions of crc32()
- */
-const unsigned long FAR * ZEXPORT get_crc_table()
-{
-#ifdef DYNAMIC_CRC_TABLE
-    if (crc_table_empty)
-        make_crc_table();
-#endif /* DYNAMIC_CRC_TABLE */
-    return (const unsigned long FAR *)crc_table;
-}
-
-/* ========================================================================= */
-#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
-#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
-
-/* ========================================================================= */
-unsigned long ZEXPORT crc32(crc, buf, len)
-    unsigned long crc;
-    const unsigned char FAR *buf;
-    unsigned len;
-{
-    if (buf == Z_NULL) return 0UL;
-
-#ifdef DYNAMIC_CRC_TABLE
-    if (crc_table_empty)
-        make_crc_table();
-#endif /* DYNAMIC_CRC_TABLE */
-
-#ifdef BYFOUR
-    if (sizeof(void *) == sizeof(ptrdiff_t)) {
-        u4 endian;
-
-        endian = 1;
-        if (*((unsigned char *)(&endian)))
-            return crc32_little(crc, buf, len);
-        else
-            return crc32_big(crc, buf, len);
-    }
-#endif /* BYFOUR */
-    crc = crc ^ 0xffffffffUL;
-    while (len >= 8) {
-        DO8;
-        len -= 8;
-    }
-    if (len) do {
-        DO1;
-    } while (--len);
-    return crc ^ 0xffffffffUL;
-}
-
-#ifdef BYFOUR
-
-/* ========================================================================= */
-#define DOLIT4 c ^= *buf4++; \
-        c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
-            crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
-#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
-
-/* ========================================================================= */
-local unsigned long crc32_little(crc, buf, len)
-    unsigned long crc;
-    const unsigned char FAR *buf;
-    unsigned len;
-{
-    register u4 c;
-    register const u4 FAR *buf4;
-
-    c = (u4)crc;
-    c = ~c;
-    while (len && ((ptrdiff_t)buf & 3)) {
-        c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
-        len--;
-    }
-
-    buf4 = (const u4 FAR *)buf;
-    while (len >= 32) {
-        DOLIT32;
-        len -= 32;
-    }
-    while (len >= 4) {
-        DOLIT4;
-        len -= 4;
-    }
-    buf = (const unsigned char FAR *)buf4;
-
-    if (len) do {
-        c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
-    } while (--len);
-    c = ~c;
-    return (unsigned long)c;
-}
-
-/* ========================================================================= */
-#define DOBIG4 c ^= *++buf4; \
-        c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
-            crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
-#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
-
-/* ========================================================================= */
-local unsigned long crc32_big(crc, buf, len)
-    unsigned long crc;
-    const unsigned char FAR *buf;
-    unsigned len;
-{
-    register u4 c;
-    register const u4 FAR *buf4;
-
-    c = REV((u4)crc);
-    c = ~c;
-    while (len && ((ptrdiff_t)buf & 3)) {
-        c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
-        len--;
-    }
-
-    buf4 = (const u4 FAR *)buf;
-    buf4--;
-    while (len >= 32) {
-        DOBIG32;
-        len -= 32;
-    }
-    while (len >= 4) {
-        DOBIG4;
-        len -= 4;
-    }
-    buf4++;
-    buf = (const unsigned char FAR *)buf4;
-
-    if (len) do {
-        c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
-    } while (--len);
-    c = ~c;
-    return (unsigned long)(REV(c));
-}
-
-#endif /* BYFOUR */

sys/src/cmd/gs/zlib/crc32.h

@@ -1,450 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* crc32.h -- tables for rapid CRC calculation
- * Generated automatically by crc32.c
- */
-
-local const unsigned long FAR crc_table[TBLS][256] =
-{
-  {
-    0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
-    0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
-    0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
-    0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
-    0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
-    0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
-    0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
-    0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
-    0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
-    0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
-    0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
-    0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
-    0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
-    0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
-    0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
-    0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
-    0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
-    0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
-    0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
-    0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
-    0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
-    0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
-    0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
-    0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
-    0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
-    0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
-    0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
-    0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
-    0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
-    0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
-    0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
-    0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
-    0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
-    0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
-    0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
-    0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
-    0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
-    0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
-    0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
-    0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
-    0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
-    0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
-    0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
-    0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
-    0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
-    0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
-    0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
-    0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
-    0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
-    0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
-    0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
-    0x2d02ef8dUL
-#ifdef BYFOUR
-  },
-  {
-    0x00000000UL, 0x191b3141UL, 0x32366282UL, 0x2b2d53c3UL, 0x646cc504UL,
-    0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
-    0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
-    0x87981ccfUL, 0x4ac21251UL, 0x53d92310UL, 0x78f470d3UL, 0x61ef4192UL,
-    0x2eaed755UL, 0x37b5e614UL, 0x1c98b5d7UL, 0x05838496UL, 0x821b9859UL,
-    0x9b00a918UL, 0xb02dfadbUL, 0xa936cb9aUL, 0xe6775d5dUL, 0xff6c6c1cUL,
-    0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
-    0xbea97761UL, 0xf1e8e1a6UL, 0xe8f3d0e7UL, 0xc3de8324UL, 0xdac5b265UL,
-    0x5d5daeaaUL, 0x44469febUL, 0x6f6bcc28UL, 0x7670fd69UL, 0x39316baeUL,
-    0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
-    0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
-    0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
-    0x73f379ffUL, 0x6ae848beUL, 0x41c51b7dUL, 0x58de2a3cUL, 0xf0794f05UL,
-    0xe9627e44UL, 0xc24f2d87UL, 0xdb541cc6UL, 0x94158a01UL, 0x8d0ebb40UL,
-    0xa623e883UL, 0xbf38d9c2UL, 0x38a0c50dUL, 0x21bbf44cUL, 0x0a96a78fUL,
-    0x138d96ceUL, 0x5ccc0009UL, 0x45d73148UL, 0x6efa628bUL, 0x77e153caUL,
-    0xbabb5d54UL, 0xa3a06c15UL, 0x888d3fd6UL, 0x91960e97UL, 0xded79850UL,
-    0xc7cca911UL, 0xece1fad2UL, 0xf5facb93UL, 0x7262d75cUL, 0x6b79e61dUL,
-    0x4054b5deUL, 0x594f849fUL, 0x160e1258UL, 0x0f152319UL, 0x243870daUL,
-    0x3d23419bUL, 0x65fd6ba7UL, 0x7ce65ae6UL, 0x57cb0925UL, 0x4ed03864UL,
-    0x0191aea3UL, 0x188a9fe2UL, 0x33a7cc21UL, 0x2abcfd60UL, 0xad24e1afUL,
-    0xb43fd0eeUL, 0x9f12832dUL, 0x8609b26cUL, 0xc94824abUL, 0xd05315eaUL,
-    0xfb7e4629UL, 0xe2657768UL, 0x2f3f79f6UL, 0x362448b7UL, 0x1d091b74UL,
-    0x04122a35UL, 0x4b53bcf2UL, 0x52488db3UL, 0x7965de70UL, 0x607eef31UL,
-    0xe7e6f3feUL, 0xfefdc2bfUL, 0xd5d0917cUL, 0xcccba03dUL, 0x838a36faUL,
-    0x9a9107bbUL, 0xb1bc5478UL, 0xa8a76539UL, 0x3b83984bUL, 0x2298a90aUL,
-    0x09b5fac9UL, 0x10aecb88UL, 0x5fef5d4fUL, 0x46f46c0eUL, 0x6dd93fcdUL,
-    0x74c20e8cUL, 0xf35a1243UL, 0xea412302UL, 0xc16c70c1UL, 0xd8774180UL,
-    0x9736d747UL, 0x8e2de606UL, 0xa500b5c5UL, 0xbc1b8484UL, 0x71418a1aUL,
-    0x685abb5bUL, 0x4377e898UL, 0x5a6cd9d9UL, 0x152d4f1eUL, 0x0c367e5fUL,
-    0x271b2d9cUL, 0x3e001cddUL, 0xb9980012UL, 0xa0833153UL, 0x8bae6290UL,
-    0x92b553d1UL, 0xddf4c516UL, 0xc4eff457UL, 0xefc2a794UL, 0xf6d996d5UL,
-    0xae07bce9UL, 0xb71c8da8UL, 0x9c31de6bUL, 0x852aef2aUL, 0xca6b79edUL,
-    0xd37048acUL, 0xf85d1b6fUL, 0xe1462a2eUL, 0x66de36e1UL, 0x7fc507a0UL,
-    0x54e85463UL, 0x4df36522UL, 0x02b2f3e5UL, 0x1ba9c2a4UL, 0x30849167UL,
-    0x299fa026UL, 0xe4c5aeb8UL, 0xfdde9ff9UL, 0xd6f3cc3aUL, 0xcfe8fd7bUL,
-    0x80a96bbcUL, 0x99b25afdUL, 0xb29f093eUL, 0xab84387fUL, 0x2c1c24b0UL,
-    0x350715f1UL, 0x1e2a4632UL, 0x07317773UL, 0x4870e1b4UL, 0x516bd0f5UL,
-    0x7a468336UL, 0x635db277UL, 0xcbfad74eUL, 0xd2e1e60fUL, 0xf9ccb5ccUL,
-    0xe0d7848dUL, 0xaf96124aUL, 0xb68d230bUL, 0x9da070c8UL, 0x84bb4189UL,
-    0x03235d46UL, 0x1a386c07UL, 0x31153fc4UL, 0x280e0e85UL, 0x674f9842UL,
-    0x7e54a903UL, 0x5579fac0UL, 0x4c62cb81UL, 0x8138c51fUL, 0x9823f45eUL,
-    0xb30ea79dUL, 0xaa1596dcUL, 0xe554001bUL, 0xfc4f315aUL, 0xd7626299UL,
-    0xce7953d8UL, 0x49e14f17UL, 0x50fa7e56UL, 0x7bd72d95UL, 0x62cc1cd4UL,
-    0x2d8d8a13UL, 0x3496bb52UL, 0x1fbbe891UL, 0x06a0d9d0UL, 0x5e7ef3ecUL,
-    0x4765c2adUL, 0x6c48916eUL, 0x7553a02fUL, 0x3a1236e8UL, 0x230907a9UL,
-    0x0824546aUL, 0x113f652bUL, 0x96a779e4UL, 0x8fbc48a5UL, 0xa4911b66UL,
-    0xbd8a2a27UL, 0xf2cbbce0UL, 0xebd08da1UL, 0xc0fdde62UL, 0xd9e6ef23UL,
-    0x14bce1bdUL, 0x0da7d0fcUL, 0x268a833fUL, 0x3f91b27eUL, 0x70d024b9UL,
-    0x69cb15f8UL, 0x42e6463bUL, 0x5bfd777aUL, 0xdc656bb5UL, 0xc57e5af4UL,
-    0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
-    0x9324fd72UL
-  },
-  {
-    0x00000000UL, 0x01c26a37UL, 0x0384d46eUL, 0x0246be59UL, 0x0709a8dcUL,
-    0x06cbc2ebUL, 0x048d7cb2UL, 0x054f1685UL, 0x0e1351b8UL, 0x0fd13b8fUL,
-    0x0d9785d6UL, 0x0c55efe1UL, 0x091af964UL, 0x08d89353UL, 0x0a9e2d0aUL,
-    0x0b5c473dUL, 0x1c26a370UL, 0x1de4c947UL, 0x1fa2771eUL, 0x1e601d29UL,
-    0x1b2f0bacUL, 0x1aed619bUL, 0x18abdfc2UL, 0x1969b5f5UL, 0x1235f2c8UL,
-    0x13f798ffUL, 0x11b126a6UL, 0x10734c91UL, 0x153c5a14UL, 0x14fe3023UL,
-    0x16b88e7aUL, 0x177ae44dUL, 0x384d46e0UL, 0x398f2cd7UL, 0x3bc9928eUL,
-    0x3a0bf8b9UL, 0x3f44ee3cUL, 0x3e86840bUL, 0x3cc03a52UL, 0x3d025065UL,
-    0x365e1758UL, 0x379c7d6fUL, 0x35dac336UL, 0x3418a901UL, 0x3157bf84UL,
-    0x3095d5b3UL, 0x32d36beaUL, 0x331101ddUL, 0x246be590UL, 0x25a98fa7UL,
-    0x27ef31feUL, 0x262d5bc9UL, 0x23624d4cUL, 0x22a0277bUL, 0x20e69922UL,
-    0x2124f315UL, 0x2a78b428UL, 0x2bbade1fUL, 0x29fc6046UL, 0x283e0a71UL,
-    0x2d711cf4UL, 0x2cb376c3UL, 0x2ef5c89aUL, 0x2f37a2adUL, 0x709a8dc0UL,
-    0x7158e7f7UL, 0x731e59aeUL, 0x72dc3399UL, 0x7793251cUL, 0x76514f2bUL,
-    0x7417f172UL, 0x75d59b45UL, 0x7e89dc78UL, 0x7f4bb64fUL, 0x7d0d0816UL,
-    0x7ccf6221UL, 0x798074a4UL, 0x78421e93UL, 0x7a04a0caUL, 0x7bc6cafdUL,
-    0x6cbc2eb0UL, 0x6d7e4487UL, 0x6f38fadeUL, 0x6efa90e9UL, 0x6bb5866cUL,
-    0x6a77ec5bUL, 0x68315202UL, 0x69f33835UL, 0x62af7f08UL, 0x636d153fUL,
-    0x612bab66UL, 0x60e9c151UL, 0x65a6d7d4UL, 0x6464bde3UL, 0x662203baUL,
-    0x67e0698dUL, 0x48d7cb20UL, 0x4915a117UL, 0x4b531f4eUL, 0x4a917579UL,
-    0x4fde63fcUL, 0x4e1c09cbUL, 0x4c5ab792UL, 0x4d98dda5UL, 0x46c49a98UL,
-    0x4706f0afUL, 0x45404ef6UL, 0x448224c1UL, 0x41cd3244UL, 0x400f5873UL,
-    0x4249e62aUL, 0x438b8c1dUL, 0x54f16850UL, 0x55330267UL, 0x5775bc3eUL,
-    0x56b7d609UL, 0x53f8c08cUL, 0x523aaabbUL, 0x507c14e2UL, 0x51be7ed5UL,
-    0x5ae239e8UL, 0x5b2053dfUL, 0x5966ed86UL, 0x58a487b1UL, 0x5deb9134UL,
-    0x5c29fb03UL, 0x5e6f455aUL, 0x5fad2f6dUL, 0xe1351b80UL, 0xe0f771b7UL,
-    0xe2b1cfeeUL, 0xe373a5d9UL, 0xe63cb35cUL, 0xe7fed96bUL, 0xe5b86732UL,
-    0xe47a0d05UL, 0xef264a38UL, 0xeee4200fUL, 0xeca29e56UL, 0xed60f461UL,
-    0xe82fe2e4UL, 0xe9ed88d3UL, 0xebab368aUL, 0xea695cbdUL, 0xfd13b8f0UL,
-    0xfcd1d2c7UL, 0xfe976c9eUL, 0xff5506a9UL, 0xfa1a102cUL, 0xfbd87a1bUL,
-    0xf99ec442UL, 0xf85cae75UL, 0xf300e948UL, 0xf2c2837fUL, 0xf0843d26UL,
-    0xf1465711UL, 0xf4094194UL, 0xf5cb2ba3UL, 0xf78d95faUL, 0xf64fffcdUL,
-    0xd9785d60UL, 0xd8ba3757UL, 0xdafc890eUL, 0xdb3ee339UL, 0xde71f5bcUL,
-    0xdfb39f8bUL, 0xddf521d2UL, 0xdc374be5UL, 0xd76b0cd8UL, 0xd6a966efUL,
-    0xd4efd8b6UL, 0xd52db281UL, 0xd062a404UL, 0xd1a0ce33UL, 0xd3e6706aUL,
-    0xd2241a5dUL, 0xc55efe10UL, 0xc49c9427UL, 0xc6da2a7eUL, 0xc7184049UL,
-    0xc25756ccUL, 0xc3953cfbUL, 0xc1d382a2UL, 0xc011e895UL, 0xcb4dafa8UL,
-    0xca8fc59fUL, 0xc8c97bc6UL, 0xc90b11f1UL, 0xcc440774UL, 0xcd866d43UL,
-    0xcfc0d31aUL, 0xce02b92dUL, 0x91af9640UL, 0x906dfc77UL, 0x922b422eUL,
-    0x93e92819UL, 0x96a63e9cUL, 0x976454abUL, 0x9522eaf2UL, 0x94e080c5UL,
-    0x9fbcc7f8UL, 0x9e7eadcfUL, 0x9c381396UL, 0x9dfa79a1UL, 0x98b56f24UL,
-    0x99770513UL, 0x9b31bb4aUL, 0x9af3d17dUL, 0x8d893530UL, 0x8c4b5f07UL,
-    0x8e0de15eUL, 0x8fcf8b69UL, 0x8a809decUL, 0x8b42f7dbUL, 0x89044982UL,
-    0x88c623b5UL, 0x839a6488UL, 0x82580ebfUL, 0x801eb0e6UL, 0x81dcdad1UL,
-    0x8493cc54UL, 0x8551a663UL, 0x8717183aUL, 0x86d5720dUL, 0xa9e2d0a0UL,
-    0xa820ba97UL, 0xaa6604ceUL, 0xaba46ef9UL, 0xaeeb787cUL, 0xaf29124bUL,
-    0xad6fac12UL, 0xacadc625UL, 0xa7f18118UL, 0xa633eb2fUL, 0xa4755576UL,
-    0xa5b73f41UL, 0xa0f829c4UL, 0xa13a43f3UL, 0xa37cfdaaUL, 0xa2be979dUL,
-    0xb5c473d0UL, 0xb40619e7UL, 0xb640a7beUL, 0xb782cd89UL, 0xb2cddb0cUL,
-    0xb30fb13bUL, 0xb1490f62UL, 0xb08b6555UL, 0xbbd72268UL, 0xba15485fUL,
-    0xb853f606UL, 0xb9919c31UL, 0xbcde8ab4UL, 0xbd1ce083UL, 0xbf5a5edaUL,
-    0xbe9834edUL
-  },
-  {
-    0x00000000UL, 0xb8bc6765UL, 0xaa09c88bUL, 0x12b5afeeUL, 0x8f629757UL,
-    0x37def032UL, 0x256b5fdcUL, 0x9dd738b9UL, 0xc5b428efUL, 0x7d084f8aUL,
-    0x6fbde064UL, 0xd7018701UL, 0x4ad6bfb8UL, 0xf26ad8ddUL, 0xe0df7733UL,
-    0x58631056UL, 0x5019579fUL, 0xe8a530faUL, 0xfa109f14UL, 0x42acf871UL,
-    0xdf7bc0c8UL, 0x67c7a7adUL, 0x75720843UL, 0xcdce6f26UL, 0x95ad7f70UL,
-    0x2d111815UL, 0x3fa4b7fbUL, 0x8718d09eUL, 0x1acfe827UL, 0xa2738f42UL,
-    0xb0c620acUL, 0x087a47c9UL, 0xa032af3eUL, 0x188ec85bUL, 0x0a3b67b5UL,
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-    0xfc63de4fUL, 0xcb091c4eUL, 0x92b75a4cUL, 0xa5dd984dUL, 0x989ac446UL,
-    0xaff00647UL, 0xf64e4045UL, 0xc1248244UL, 0x4432cd41UL, 0x73580f40UL,
-    0x2ae64942UL, 0x1d8c8b43UL, 0x5068f154UL, 0x67023355UL, 0x3ebc7557UL,
-    0x09d6b756UL, 0x8cc0f853UL, 0xbbaa3a52UL, 0xe2147c50UL, 0xd57ebe51UL,
-    0xe839e25aUL, 0xdf53205bUL, 0x86ed6659UL, 0xb187a458UL, 0x3491eb5dUL,
-    0x03fb295cUL, 0x5a456f5eUL, 0x6d2fad5fUL, 0x801b35e1UL, 0xb771f7e0UL,
-    0xeecfb1e2UL, 0xd9a573e3UL, 0x5cb33ce6UL, 0x6bd9fee7UL, 0x3267b8e5UL,
-    0x050d7ae4UL, 0x384a26efUL, 0x0f20e4eeUL, 0x569ea2ecUL, 0x61f460edUL,
-    0xe4e22fe8UL, 0xd388ede9UL, 0x8a36abebUL, 0xbd5c69eaUL, 0xf0b813fdUL,
-    0xc7d2d1fcUL, 0x9e6c97feUL, 0xa90655ffUL, 0x2c101afaUL, 0x1b7ad8fbUL,
-    0x42c49ef9UL, 0x75ae5cf8UL, 0x48e900f3UL, 0x7f83c2f2UL, 0x263d84f0UL,
-    0x115746f1UL, 0x944109f4UL, 0xa32bcbf5UL, 0xfa958df7UL, 0xcdff4ff6UL,
-    0x605d78d9UL, 0x5737bad8UL, 0x0e89fcdaUL, 0x39e33edbUL, 0xbcf571deUL,
-    0x8b9fb3dfUL, 0xd221f5ddUL, 0xe54b37dcUL, 0xd80c6bd7UL, 0xef66a9d6UL,
-    0xb6d8efd4UL, 0x81b22dd5UL, 0x04a462d0UL, 0x33cea0d1UL, 0x6a70e6d3UL,
-    0x5d1a24d2UL, 0x10fe5ec5UL, 0x27949cc4UL, 0x7e2adac6UL, 0x494018c7UL,
-    0xcc5657c2UL, 0xfb3c95c3UL, 0xa282d3c1UL, 0x95e811c0UL, 0xa8af4dcbUL,
-    0x9fc58fcaUL, 0xc67bc9c8UL, 0xf1110bc9UL, 0x740744ccUL, 0x436d86cdUL,
-    0x1ad3c0cfUL, 0x2db902ceUL, 0x4096af91UL, 0x77fc6d90UL, 0x2e422b92UL,
-    0x1928e993UL, 0x9c3ea696UL, 0xab546497UL, 0xf2ea2295UL, 0xc580e094UL,
-    0xf8c7bc9fUL, 0xcfad7e9eUL, 0x9613389cUL, 0xa179fa9dUL, 0x246fb598UL,
-    0x13057799UL, 0x4abb319bUL, 0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL,
-    0x5ee10d8eUL, 0x698bcf8fUL, 0xec9d808aUL, 0xdbf7428bUL, 0x82490489UL,
-    0xb523c688UL, 0x88649a83UL, 0xbf0e5882UL, 0xe6b01e80UL, 0xd1dadc81UL,
-    0x54cc9384UL, 0x63a65185UL, 0x3a181787UL, 0x0d72d586UL, 0xa0d0e2a9UL,
-    0x97ba20a8UL, 0xce0466aaUL, 0xf96ea4abUL, 0x7c78ebaeUL, 0x4b1229afUL,
-    0x12ac6fadUL, 0x25c6adacUL, 0x1881f1a7UL, 0x2feb33a6UL, 0x765575a4UL,
-    0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL,
-    0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL,
-    0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL,
-    0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL,
-    0xed3498beUL
-  },
-  {
-    0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL,
-    0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL,
-    0x64e0bd6fUL, 0x018701d7UL, 0xb8bfd64aUL, 0xddd86af2UL, 0x3377dfe0UL,
-    0x56106358UL, 0x9f571950UL, 0xfa30a5e8UL, 0x149f10faUL, 0x71f8ac42UL,
-    0xc8c07bdfUL, 0xada7c767UL, 0x43087275UL, 0x266fcecdUL, 0x707fad95UL,
-    0x1518112dUL, 0xfbb7a43fUL, 0x9ed01887UL, 0x27e8cf1aUL, 0x428f73a2UL,
-    0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL,
-    0xd00087b2UL, 0x6938502fUL, 0x0c5fec97UL, 0xe2f05985UL, 0x8797e53dUL,
-    0xd1878665UL, 0xb4e03addUL, 0x5a4f8fcfUL, 0x3f283377UL, 0x8610e4eaUL,
-    0xe3775852UL, 0x0dd8ed40UL, 0x68bf51f8UL, 0xa1f82bf0UL, 0xc49f9748UL,
-    0x2a30225aUL, 0x4f579ee2UL, 0xf66f497fUL, 0x9308f5c7UL, 0x7da740d5UL,
-    0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL,
-    0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL,
-    0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL,
-    0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL,
-    0x3cdf154cUL, 0x85e7c2d1UL, 0xe0807e69UL, 0x0e2fcb7bUL, 0x6b4877c3UL,
-    0xa20f0dcbUL, 0xc768b173UL, 0x29c70461UL, 0x4ca0b8d9UL, 0xf5986f44UL,
-    0x90ffd3fcUL, 0x7e5066eeUL, 0x1b37da56UL, 0x4d27b90eUL, 0x284005b6UL,
-    0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL,
-    0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL,
-    0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL,
-    0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL,
-    0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL,
-    0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL,
-    0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL,
-    0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL,
-    0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL,
-    0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL,
-    0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL,
-    0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL,
-    0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL,
-    0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL,
-    0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL,
-    0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL,
-    0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL,
-    0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL,
-    0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
-    0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
-    0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
-    0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
-    0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
-    0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
-    0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
-    0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
-    0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
-    0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
-    0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
-    0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
-    0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
-    0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
-    0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
-    0xf10605deUL
-#endif
-  }
-};

sys/src/cmd/gs/zlib/deflate.c

@@ -1,1511 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2004 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- *  ALGORITHM
- *
- *      The "deflation" process depends on being able to identify portions
- *      of the input text which are identical to earlier input (within a
- *      sliding window trailing behind the input currently being processed).
- *
- *      The most straightforward technique turns out to be the fastest for
- *      most input files: try all possible matches and select the longest.
- *      The key feature of this algorithm is that insertions into the string
- *      dictionary are very simple and thus fast, and deletions are avoided
- *      completely. Insertions are performed at each input character, whereas
- *      string matches are performed only when the previous match ends. So it
- *      is preferable to spend more time in matches to allow very fast string
- *      insertions and avoid deletions. The matching algorithm for small
- *      strings is inspired from that of Rabin & Karp. A brute force approach
- *      is used to find longer strings when a small match has been found.
- *      A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
- *      (by Leonid Broukhis).
- *         A previous version of this file used a more sophisticated algorithm
- *      (by Fiala and Greene) which is guaranteed to run in linear amortized
- *      time, but has a larger average cost, uses more memory and is patented.
- *      However the F&G algorithm may be faster for some highly redundant
- *      files if the parameter max_chain_length (described below) is too large.
- *
- *  ACKNOWLEDGEMENTS
- *
- *      The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
- *      I found it in 'freeze' written by Leonid Broukhis.
- *      Thanks to many people for bug reports and testing.
- *
- *  REFERENCES
- *
- *      Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
- *      Available in http://www.ietf.org/rfc/rfc1951.txt
- *
- *      A description of the Rabin and Karp algorithm is given in the book
- *         "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
- *
- *      Fiala,E.R., and Greene,D.H.
- *         Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
- *
- */
-
-/* @(#) $Id: deflate.c,v 1.1.1.1 2005/04/24 21:39:40 giles Exp $ */
-
-#include "deflate.h"
-
-const char deflate_copyright[] =
-   " deflate 1.2.2 Copyright 1995-2004 Jean-loup Gailly ";
-/*
-  If you use the zlib library in a product, an acknowledgment is welcome
-  in the documentation of your product. If for some reason you cannot
-  include such an acknowledgment, I would appreciate that you keep this
-  copyright string in the executable of your product.
- */
-
-/* ===========================================================================
- *  Function prototypes.
- */
-typedef enum {
-    need_more,      /* block not completed, need more input or more output */
-    block_done,     /* block flush performed */
-    finish_started, /* finish started, need only more output at next deflate */
-    finish_done     /* finish done, accept no more input or output */
-} block_state;
-
-typedef block_state (*compress_func) OF((deflate_state *s, int flush));
-/* Compression function. Returns the block state after the call. */
-
-local void fill_window    OF((deflate_state *s));
-local block_state deflate_stored OF((deflate_state *s, int flush));
-local block_state deflate_fast   OF((deflate_state *s, int flush));
-#ifndef FASTEST
-local block_state deflate_slow   OF((deflate_state *s, int flush));
-#endif
-local void lm_init        OF((deflate_state *s));
-local void putShortMSB    OF((deflate_state *s, uInt b));
-local void flush_pending  OF((z_streamp strm));
-local int read_buf        OF((z_streamp strm, Bytef *buf, unsigned size));
-#ifndef FASTEST
-#ifdef ASMV
-      void match_init OF((void)); /* asm code initialization */
-      uInt longest_match  OF((deflate_state *s, IPos cur_match));
-#else
-local uInt longest_match  OF((deflate_state *s, IPos cur_match));
-#endif
-#endif
-local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
-
-#ifdef DEBUG
-local  void check_match OF((deflate_state *s, IPos start, IPos match,
-                            int length));
-#endif
-
-/* ===========================================================================
- * Local data
- */
-
-#define NIL 0
-/* Tail of hash chains */
-
-#ifndef TOO_FAR
-#  define TOO_FAR 4096
-#endif
-/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
-
-#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
-/* Minimum amount of lookahead, except at the end of the input file.
- * See deflate.c for comments about the MIN_MATCH+1.
- */
-
-/* Values for max_lazy_match, good_match and max_chain_length, depending on
- * the desired pack level (0..9). The values given below have been tuned to
- * exclude worst case performance for pathological files. Better values may be
- * found for specific files.
- */
-typedef struct config_s {
-   ush good_length; /* reduce lazy search above this match length */
-   ush max_lazy;    /* do not perform lazy search above this match length */
-   ush nice_length; /* quit search above this match length */
-   ush max_chain;
-   compress_func func;
-} config;
-
-#ifdef FASTEST
-local const config configuration_table[2] = {
-/*      good lazy nice chain */
-/* 0 */ {0,    0,  0,    0, deflate_stored},  /* store only */
-/* 1 */ {4,    4,  8,    4, deflate_fast}}; /* max speed, no lazy matches */
-#else
-local const config configuration_table[10] = {
-/*      good lazy nice chain */
-/* 0 */ {0,    0,  0,    0, deflate_stored},  /* store only */
-/* 1 */ {4,    4,  8,    4, deflate_fast}, /* max speed, no lazy matches */
-/* 2 */ {4,    5, 16,    8, deflate_fast},
-/* 3 */ {4,    6, 32,   32, deflate_fast},
-
-/* 4 */ {4,    4, 16,   16, deflate_slow},  /* lazy matches */
-/* 5 */ {8,   16, 32,   32, deflate_slow},
-/* 6 */ {8,   16, 128, 128, deflate_slow},
-/* 7 */ {8,   32, 128, 256, deflate_slow},
-/* 8 */ {32, 128, 258, 1024, deflate_slow},
-/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */
-#endif
-
-/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
- * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
- * meaning.
- */
-
-#define EQUAL 0
-/* result of memcmp for equal strings */
-
-#ifndef NO_DUMMY_DECL
-struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
-#endif
-
-/* ===========================================================================
- * Update a hash value with the given input byte
- * IN  assertion: all calls to to UPDATE_HASH are made with consecutive
- *    input characters, so that a running hash key can be computed from the
- *    previous key instead of complete recalculation each time.
- */
-#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
-
-
-/* ===========================================================================
- * Insert string str in the dictionary and set match_head to the previous head
- * of the hash chain (the most recent string with same hash key). Return
- * the previous length of the hash chain.
- * If this file is compiled with -DFASTEST, the compression level is forced
- * to 1, and no hash chains are maintained.
- * IN  assertion: all calls to to INSERT_STRING are made with consecutive
- *    input characters and the first MIN_MATCH bytes of str are valid
- *    (except for the last MIN_MATCH-1 bytes of the input file).
- */
-#ifdef FASTEST
-#define INSERT_STRING(s, str, match_head) \
-   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
-    match_head = s->head[s->ins_h], \
-    s->head[s->ins_h] = (Pos)(str))
-#else
-#define INSERT_STRING(s, str, match_head) \
-   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
-    match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
-    s->head[s->ins_h] = (Pos)(str))
-#endif
-
-/* ===========================================================================
- * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
- * prev[] will be initialized on the fly.
- */
-#define CLEAR_HASH(s) \
-    s->head[s->hash_size-1] = NIL; \
-    zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
-
-/* ========================================================================= */
-int ZEXPORT deflateInit_(strm, level, version, stream_size)
-    z_streamp strm;
-    int level;
-    const char *version;
-    int stream_size;
-{
-    return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
-                         Z_DEFAULT_STRATEGY, version, stream_size);
-    /* To do: ignore strm->next_in if we use it as window */
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
-                  version, stream_size)
-    z_streamp strm;
-    int  level;
-    int  method;
-    int  windowBits;
-    int  memLevel;
-    int  strategy;
-    const char *version;
-    int stream_size;
-{
-    deflate_state *s;
-    int wrap = 1;
-    static const char my_version[] = ZLIB_VERSION;
-
-    ushf *overlay;
-    /* We overlay pending_buf and d_buf+l_buf. This works since the average
-     * output size for (length,distance) codes is <= 24 bits.
-     */
-
-    if (version == Z_NULL || version[0] != my_version[0] ||
-        stream_size != sizeof(z_stream)) {
-        return Z_VERSION_ERROR;
-    }
-    if (strm == Z_NULL) return Z_STREAM_ERROR;
-
-    strm->msg = Z_NULL;
-    if (strm->zalloc == (alloc_func)0) {
-        strm->zalloc = zcalloc;
-        strm->opaque = (voidpf)0;
-    }
-    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
-
-#ifdef FASTEST
-    if (level != 0) level = 1;
-#else
-    if (level == Z_DEFAULT_COMPRESSION) level = 6;
-#endif
-
-    if (windowBits < 0) { /* suppress zlib wrapper */
-        wrap = 0;
-        windowBits = -windowBits;
-    }
-#ifdef GZIP
-    else if (windowBits > 15) {
-        wrap = 2;       /* write gzip wrapper instead */
-        windowBits -= 16;
-    }
-#endif
-    if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
-        windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
-        strategy < 0 || strategy > Z_RLE) {
-        return Z_STREAM_ERROR;
-    }
-    if (windowBits == 8) windowBits = 9;  /* until 256-byte window bug fixed */
-    s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
-    if (s == Z_NULL) return Z_MEM_ERROR;
-    strm->state = (struct internal_state FAR *)s;
-    s->strm = strm;
-
-    s->wrap = wrap;
-    s->w_bits = windowBits;
-    s->w_size = 1 << s->w_bits;
-    s->w_mask = s->w_size - 1;
-
-    s->hash_bits = memLevel + 7;
-    s->hash_size = 1 << s->hash_bits;
-    s->hash_mask = s->hash_size - 1;
-    s->hash_shift =  ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
-
-    s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
-    s->prev   = (Posf *)  ZALLOC(strm, s->w_size, sizeof(Pos));
-    s->head   = (Posf *)  ZALLOC(strm, s->hash_size, sizeof(Pos));
-
-    s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
-
-    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
-    s->pending_buf = (uchf *) overlay;
-    s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
-
-    if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
-        s->pending_buf == Z_NULL) {
-        s->status = FINISH_STATE;
-        strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
-        deflateEnd (strm);
-        return Z_MEM_ERROR;
-    }
-    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
-    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
-
-    s->level = level;
-    s->strategy = strategy;
-    s->method = (Byte)method;
-
-    return deflateReset(strm);
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
-    z_streamp strm;
-    const Bytef *dictionary;
-    uInt  dictLength;
-{
-    deflate_state *s;
-    uInt length = dictLength;
-    uInt n;
-    IPos hash_head = 0;
-
-    if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
-        strm->state->wrap == 2 ||
-        (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
-        return Z_STREAM_ERROR;
-
-    s = strm->state;
-    if (s->wrap)
-        strm->adler = adler32(strm->adler, dictionary, dictLength);
-
-    if (length < MIN_MATCH) return Z_OK;
-    if (length > MAX_DIST(s)) {
-        length = MAX_DIST(s);
-#ifndef USE_DICT_HEAD
-        dictionary += dictLength - length; /* use the tail of the dictionary */
-#endif
-    }
-    zmemcpy(s->window, dictionary, length);
-    s->strstart = length;
-    s->block_start = (long)length;
-
-    /* Insert all strings in the hash table (except for the last two bytes).
-     * s->lookahead stays null, so s->ins_h will be recomputed at the next
-     * call of fill_window.
-     */
-    s->ins_h = s->window[0];
-    UPDATE_HASH(s, s->ins_h, s->window[1]);
-    for (n = 0; n <= length - MIN_MATCH; n++) {
-        INSERT_STRING(s, n, hash_head);
-    }
-    if (hash_head) hash_head = 0;  /* to make compiler happy */
-    return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateReset (strm)
-    z_streamp strm;
-{
-    deflate_state *s;
-
-    if (strm == Z_NULL || strm->state == Z_NULL ||
-        strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {
-        return Z_STREAM_ERROR;
-    }
-
-    strm->total_in = strm->total_out = 0;
-    strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
-    strm->data_type = Z_UNKNOWN;
-
-    s = (deflate_state *)strm->state;
-    s->pending = 0;
-    s->pending_out = s->pending_buf;
-
-    if (s->wrap < 0) {
-        s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
-    }
-    s->status = s->wrap ? INIT_STATE : BUSY_STATE;
-    strm->adler =
-#ifdef GZIP
-        s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
-#endif
-        adler32(0L, Z_NULL, 0);
-    s->last_flush = Z_NO_FLUSH;
-
-    _tr_init(s);
-    lm_init(s);
-
-    return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflatePrime (strm, bits, value)
-    z_streamp strm;
-    int bits;
-    int value;
-{
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    strm->state->bi_valid = bits;
-    strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
-    return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateParams(strm, level, strategy)
-    z_streamp strm;
-    int level;
-    int strategy;
-{
-    deflate_state *s;
-    compress_func func;
-    int err = Z_OK;
-
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    s = strm->state;
-
-#ifdef FASTEST
-    if (level != 0) level = 1;
-#else
-    if (level == Z_DEFAULT_COMPRESSION) level = 6;
-#endif
-    if (level < 0 || level > 9 || strategy < 0 || strategy > Z_RLE) {
-        return Z_STREAM_ERROR;
-    }
-    func = configuration_table[s->level].func;
-
-    if (func != configuration_table[level].func && strm->total_in != 0) {
-        /* Flush the last buffer: */
-        err = deflate(strm, Z_PARTIAL_FLUSH);
-    }
-    if (s->level != level) {
-        s->level = level;
-        s->max_lazy_match   = configuration_table[level].max_lazy;
-        s->good_match       = configuration_table[level].good_length;
-        s->nice_match       = configuration_table[level].nice_length;
-        s->max_chain_length = configuration_table[level].max_chain;
-    }
-    s->strategy = strategy;
-    return err;
-}
-
-/* =========================================================================
- * For the default windowBits of 15 and memLevel of 8, this function returns
- * a close to exact, as well as small, upper bound on the compressed size.
- * They are coded as constants here for a reason--if the #define's are
- * changed, then this function needs to be changed as well.  The return
- * value for 15 and 8 only works for those exact settings.
- *
- * For any setting other than those defaults for windowBits and memLevel,
- * the value returned is a conservative worst case for the maximum expansion
- * resulting from using fixed blocks instead of stored blocks, which deflate
- * can emit on compressed data for some combinations of the parameters.
- *
- * This function could be more sophisticated to provide closer upper bounds
- * for every combination of windowBits and memLevel, as well as wrap.
- * But even the conservative upper bound of about 14% expansion does not
- * seem onerous for output buffer allocation.
- */
-uLong ZEXPORT deflateBound(strm, sourceLen)
-    z_streamp strm;
-    uLong sourceLen;
-{
-    deflate_state *s;
-    uLong destLen;
-
-    /* conservative upper bound */
-    destLen = sourceLen +
-              ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
-
-    /* if can't get parameters, return conservative bound */
-    if (strm == Z_NULL || strm->state == Z_NULL)
-        return destLen;
-
-    /* if not default parameters, return conservative bound */
-    s = strm->state;
-    if (s->w_bits != 15 || s->hash_bits != 8 + 7)
-        return destLen;
-
-    /* default settings: return tight bound for that case */
-    return compressBound(sourceLen);
-}
-
-/* =========================================================================
- * Put a short in the pending buffer. The 16-bit value is put in MSB order.
- * IN assertion: the stream state is correct and there is enough room in
- * pending_buf.
- */
-local void putShortMSB (s, b)
-    deflate_state *s;
-    uInt b;
-{
-    put_byte(s, (Byte)(b >> 8));
-    put_byte(s, (Byte)(b & 0xff));
-}
-
-/* =========================================================================
- * Flush as much pending output as possible. All deflate() output goes
- * through this function so some applications may wish to modify it
- * to avoid allocating a large strm->next_out buffer and copying into it.
- * (See also read_buf()).
- */
-local void flush_pending(strm)
-    z_streamp strm;
-{
-    unsigned len = strm->state->pending;
-
-    if (len > strm->avail_out) len = strm->avail_out;
-    if (len == 0) return;
-
-    zmemcpy(strm->next_out, strm->state->pending_out, len);
-    strm->next_out  += len;
-    strm->state->pending_out  += len;
-    strm->total_out += len;
-    strm->avail_out  -= len;
-    strm->state->pending -= len;
-    if (strm->state->pending == 0) {
-        strm->state->pending_out = strm->state->pending_buf;
-    }
-}
-
-/* ========================================================================= */
-int ZEXPORT deflate (strm, flush)
-    z_streamp strm;
-    int flush;
-{
-    int old_flush; /* value of flush param for previous deflate call */
-    deflate_state *s;
-
-    if (strm == Z_NULL || strm->state == Z_NULL ||
-        flush > Z_FINISH || flush < 0) {
-        return Z_STREAM_ERROR;
-    }
-    s = strm->state;
-
-    if (strm->next_out == Z_NULL ||
-        (strm->next_in == Z_NULL && strm->avail_in != 0) ||
-        (s->status == FINISH_STATE && flush != Z_FINISH)) {
-        ERR_RETURN(strm, Z_STREAM_ERROR);
-    }
-    if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
-
-    s->strm = strm; /* just in case */
-    old_flush = s->last_flush;
-    s->last_flush = flush;
-
-    /* Write the header */
-    if (s->status == INIT_STATE) {
-#ifdef GZIP
-        if (s->wrap == 2) {
-            put_byte(s, 31);
-            put_byte(s, 139);
-            put_byte(s, 8);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, s->level == 9 ? 2 :
-                        (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
-                         4 : 0));
-            put_byte(s, 255);
-            s->status = BUSY_STATE;
-            strm->adler = crc32(0L, Z_NULL, 0);
-        }
-        else
-#endif
-        {
-            uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
-            uInt level_flags;
-
-            if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
-                level_flags = 0;
-            else if (s->level < 6)
-                level_flags = 1;
-            else if (s->level == 6)
-                level_flags = 2;
-            else
-                level_flags = 3;
-            header |= (level_flags << 6);
-            if (s->strstart != 0) header |= PRESET_DICT;
-            header += 31 - (header % 31);
-
-            s->status = BUSY_STATE;
-            putShortMSB(s, header);
-
-            /* Save the adler32 of the preset dictionary: */
-            if (s->strstart != 0) {
-                putShortMSB(s, (uInt)(strm->adler >> 16));
-                putShortMSB(s, (uInt)(strm->adler & 0xffff));
-            }
-            strm->adler = adler32(0L, Z_NULL, 0);
-        }
-    }
-
-    /* Flush as much pending output as possible */
-    if (s->pending != 0) {
-        flush_pending(strm);
-        if (strm->avail_out == 0) {
-            /* Since avail_out is 0, deflate will be called again with
-             * more output space, but possibly with both pending and
-             * avail_in equal to zero. There won't be anything to do,
-             * but this is not an error situation so make sure we
-             * return OK instead of BUF_ERROR at next call of deflate:
-             */
-            s->last_flush = -1;
-            return Z_OK;
-        }
-
-    /* Make sure there is something to do and avoid duplicate consecutive
-     * flushes. For repeated and useless calls with Z_FINISH, we keep
-     * returning Z_STREAM_END instead of Z_BUF_ERROR.
-     */
-    } else if (strm->avail_in == 0 && flush <= old_flush &&
-               flush != Z_FINISH) {
-        ERR_RETURN(strm, Z_BUF_ERROR);
-    }
-
-    /* User must not provide more input after the first FINISH: */
-    if (s->status == FINISH_STATE && strm->avail_in != 0) {
-        ERR_RETURN(strm, Z_BUF_ERROR);
-    }
-
-    /* Start a new block or continue the current one.
-     */
-    if (strm->avail_in != 0 || s->lookahead != 0 ||
-        (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
-        block_state bstate;
-
-        bstate = (*(configuration_table[s->level].func))(s, flush);
-
-        if (bstate == finish_started || bstate == finish_done) {
-            s->status = FINISH_STATE;
-        }
-        if (bstate == need_more || bstate == finish_started) {
-            if (strm->avail_out == 0) {
-                s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
-            }
-            return Z_OK;
-            /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
-             * of deflate should use the same flush parameter to make sure
-             * that the flush is complete. So we don't have to output an
-             * empty block here, this will be done at next call. This also
-             * ensures that for a very small output buffer, we emit at most
-             * one empty block.
-             */
-        }
-        if (bstate == block_done) {
-            if (flush == Z_PARTIAL_FLUSH) {
-                _tr_align(s);
-            } else { /* FULL_FLUSH or SYNC_FLUSH */
-                _tr_stored_block(s, (char*)0, 0L, 0);
-                /* For a full flush, this empty block will be recognized
-                 * as a special marker by inflate_sync().
-                 */
-                if (flush == Z_FULL_FLUSH) {
-                    CLEAR_HASH(s);             /* forget history */
-                }
-            }
-            flush_pending(strm);
-            if (strm->avail_out == 0) {
-              s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
-              return Z_OK;
-            }
-        }
-    }
-    Assert(strm->avail_out > 0, "bug2");
-
-    if (flush != Z_FINISH) return Z_OK;
-    if (s->wrap <= 0) return Z_STREAM_END;
-
-    /* Write the trailer */
-#ifdef GZIP
-    if (s->wrap == 2) {
-        put_byte(s, (Byte)(strm->adler & 0xff));
-        put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
-        put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
-        put_byte(s, (Byte)((strm->adler >> 24) & 0xff));
-        put_byte(s, (Byte)(strm->total_in & 0xff));
-        put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));
-        put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));
-        put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));
-    }
-    else
-#endif
-    {
-        putShortMSB(s, (uInt)(strm->adler >> 16));
-        putShortMSB(s, (uInt)(strm->adler & 0xffff));
-    }
-    flush_pending(strm);
-    /* If avail_out is zero, the application will call deflate again
-     * to flush the rest.
-     */
-    if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
-    return s->pending != 0 ? Z_OK : Z_STREAM_END;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateEnd (strm)
-    z_streamp strm;
-{
-    int status;
-
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-
-    status = strm->state->status;
-    if (status != INIT_STATE && status != BUSY_STATE &&
-        status != FINISH_STATE) {
-      return Z_STREAM_ERROR;
-    }
-
-    /* Deallocate in reverse order of allocations: */
-    TRY_FREE(strm, strm->state->pending_buf);
-    TRY_FREE(strm, strm->state->head);
-    TRY_FREE(strm, strm->state->prev);
-    TRY_FREE(strm, strm->state->window);
-
-    ZFREE(strm, strm->state);
-    strm->state = Z_NULL;
-
-    return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
-}
-
-/* =========================================================================
- * Copy the source state to the destination state.
- * To simplify the source, this is not supported for 16-bit MSDOS (which
- * doesn't have enough memory anyway to duplicate compression states).
- */
-int ZEXPORT deflateCopy (dest, source)
-    z_streamp dest;
-    z_streamp source;
-{
-#ifdef MAXSEG_64K
-    return Z_STREAM_ERROR;
-#else
-    deflate_state *ds;
-    deflate_state *ss;
-    ushf *overlay;
-
-
-    if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
-        return Z_STREAM_ERROR;
-    }
-
-    ss = source->state;
-
-    *dest = *source;
-
-    ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
-    if (ds == Z_NULL) return Z_MEM_ERROR;
-    dest->state = (struct internal_state FAR *) ds;
-    *ds = *ss;
-    ds->strm = dest;
-
-    ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
-    ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
-    ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
-    overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
-    ds->pending_buf = (uchf *) overlay;
-
-    if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
-        ds->pending_buf == Z_NULL) {
-        deflateEnd (dest);
-        return Z_MEM_ERROR;
-    }
-    /* following zmemcpy do not work for 16-bit MSDOS */
-    zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
-    zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
-    zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
-    zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
-
-    ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
-    ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
-    ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
-
-    ds->l_desc.dyn_tree = ds->dyn_ltree;
-    ds->d_desc.dyn_tree = ds->dyn_dtree;
-    ds->bl_desc.dyn_tree = ds->bl_tree;
-
-    return Z_OK;
-#endif /* MAXSEG_64K */
-}
-
-/* ===========================================================================
- * Read a new buffer from the current input stream, update the adler32
- * and total number of bytes read.  All deflate() input goes through
- * this function so some applications may wish to modify it to avoid
- * allocating a large strm->next_in buffer and copying from it.
- * (See also flush_pending()).
- */
-local int read_buf(strm, buf, size)
-    z_streamp strm;
-    Bytef *buf;
-    unsigned size;
-{
-    unsigned len = strm->avail_in;
-
-    if (len > size) len = size;
-    if (len == 0) return 0;
-
-    strm->avail_in  -= len;
-
-    if (strm->state->wrap == 1) {
-        strm->adler = adler32(strm->adler, strm->next_in, len);
-    }
-#ifdef GZIP
-    else if (strm->state->wrap == 2) {
-        strm->adler = crc32(strm->adler, strm->next_in, len);
-    }
-#endif
-    zmemcpy(buf, strm->next_in, len);
-    strm->next_in  += len;
-    strm->total_in += len;
-
-    return (int)len;
-}
-
-/* ===========================================================================
- * Initialize the "longest match" routines for a new zlib stream
- */
-local void lm_init (s)
-    deflate_state *s;
-{
-    s->window_size = (ulg)2L*s->w_size;
-
-    CLEAR_HASH(s);
-
-    /* Set the default configuration parameters:
-     */
-    s->max_lazy_match   = configuration_table[s->level].max_lazy;
-    s->good_match       = configuration_table[s->level].good_length;
-    s->nice_match       = configuration_table[s->level].nice_length;
-    s->max_chain_length = configuration_table[s->level].max_chain;
-
-    s->strstart = 0;
-    s->block_start = 0L;
-    s->lookahead = 0;
-    s->match_length = s->prev_length = MIN_MATCH-1;
-    s->match_available = 0;
-    s->ins_h = 0;
-#ifdef ASMV
-    match_init(); /* initialize the asm code */
-#endif
-}
-
-#ifndef FASTEST
-/* ===========================================================================
- * Set match_start to the longest match starting at the given string and
- * return its length. Matches shorter or equal to prev_length are discarded,
- * in which case the result is equal to prev_length and match_start is
- * garbage.
- * IN assertions: cur_match is the head of the hash chain for the current
- *   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
- * OUT assertion: the match length is not greater than s->lookahead.
- */
-#ifndef ASMV
-/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
- * match.S. The code will be functionally equivalent.
- */
-local uInt longest_match(s, cur_match)
-    deflate_state *s;
-    IPos cur_match;                             /* current match */
-{
-    unsigned chain_length = s->max_chain_length;/* max hash chain length */
-    register Bytef *scan = s->window + s->strstart; /* current string */
-    register Bytef *match;                       /* matched string */
-    register int len;                           /* length of current match */
-    int best_len = s->prev_length;              /* best match length so far */
-    int nice_match = s->nice_match;             /* stop if match long enough */
-    IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
-        s->strstart - (IPos)MAX_DIST(s) : NIL;
-    /* Stop when cur_match becomes <= limit. To simplify the code,
-     * we prevent matches with the string of window index 0.
-     */
-    Posf *prev = s->prev;
-    uInt wmask = s->w_mask;
-
-#ifdef UNALIGNED_OK
-    /* Compare two bytes at a time. Note: this is not always beneficial.
-     * Try with and without -DUNALIGNED_OK to check.
-     */
-    register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
-    register ush scan_start = *(ushf*)scan;
-    register ush scan_end   = *(ushf*)(scan+best_len-1);
-#else
-    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
-    register Byte scan_end1  = scan[best_len-1];
-    register Byte scan_end   = scan[best_len];
-#endif
-
-    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
-     * It is easy to get rid of this optimization if necessary.
-     */
-    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
-
-    /* Do not waste too much time if we already have a good match: */
-    if (s->prev_length >= s->good_match) {
-        chain_length >>= 2;
-    }
-    /* Do not look for matches beyond the end of the input. This is necessary
-     * to make deflate deterministic.
-     */
-    if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
-
-    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
-
-    do {
-        Assert(cur_match < s->strstart, "no future");
-        match = s->window + cur_match;
-
-        /* Skip to next match if the match length cannot increase
-         * or if the match length is less than 2:
-         */
-#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
-        /* This code assumes sizeof(unsigned short) == 2. Do not use
-         * UNALIGNED_OK if your compiler uses a different size.
-         */
-        if (*(ushf*)(match+best_len-1) != scan_end ||
-            *(ushf*)match != scan_start) continue;
-
-        /* It is not necessary to compare scan[2] and match[2] since they are
-         * always equal when the other bytes match, given that the hash keys
-         * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
-         * strstart+3, +5, ... up to strstart+257. We check for insufficient
-         * lookahead only every 4th comparison; the 128th check will be made
-         * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
-         * necessary to put more guard bytes at the end of the window, or
-         * to check more often for insufficient lookahead.
-         */
-        Assert(scan[2] == match[2], "scan[2]?");
-        scan++, match++;
-        do {
-        } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
-                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
-                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
-                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
-                 scan < strend);
-        /* The funny "do {}" generates better code on most compilers */
-
-        /* Here, scan <= window+strstart+257 */
-        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
-        if (*scan == *match) scan++;
-
-        len = (MAX_MATCH - 1) - (int)(strend-scan);
-        scan = strend - (MAX_MATCH-1);
-
-#else /* UNALIGNED_OK */
-
-        if (match[best_len]   != scan_end  ||
-            match[best_len-1] != scan_end1 ||
-            *match            != *scan     ||
-            *++match          != scan[1])      continue;
-
-        /* The check at best_len-1 can be removed because it will be made
-         * again later. (This heuristic is not always a win.)
-         * It is not necessary to compare scan[2] and match[2] since they
-         * are always equal when the other bytes match, given that
-         * the hash keys are equal and that HASH_BITS >= 8.
-         */
-        scan += 2, match++;
-        Assert(*scan == *match, "match[2]?");
-
-        /* We check for insufficient lookahead only every 8th comparison;
-         * the 256th check will be made at strstart+258.
-         */
-        do {
-        } while (*++scan == *++match && *++scan == *++match &&
-                 *++scan == *++match && *++scan == *++match &&
-                 *++scan == *++match && *++scan == *++match &&
-                 *++scan == *++match && *++scan == *++match &&
-                 scan < strend);
-
-        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
-
-        len = MAX_MATCH - (int)(strend - scan);
-        scan = strend - MAX_MATCH;
-
-#endif /* UNALIGNED_OK */
-
-        if (len > best_len) {
-            s->match_start = cur_match;
-            best_len = len;
-            if (len >= nice_match) break;
-#ifdef UNALIGNED_OK
-            scan_end = *(ushf*)(scan+best_len-1);
-#else
-            scan_end1  = scan[best_len-1];
-            scan_end   = scan[best_len];
-#endif
-        }
-    } while ((cur_match = prev[cur_match & wmask]) > limit
-             && --chain_length != 0);
-
-    if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
-    return s->lookahead;
-}
-#endif /* ASMV */
-#endif /* FASTEST */
-
-/* ---------------------------------------------------------------------------
- * Optimized version for level == 1 or strategy == Z_RLE only
- */
-local uInt longest_match_fast(s, cur_match)
-    deflate_state *s;
-    IPos cur_match;                             /* current match */
-{
-    register Bytef *scan = s->window + s->strstart; /* current string */
-    register Bytef *match;                       /* matched string */
-    register int len;                           /* length of current match */
-    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
-
-    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
-     * It is easy to get rid of this optimization if necessary.
-     */
-    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
-
-    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
-
-    Assert(cur_match < s->strstart, "no future");
-
-    match = s->window + cur_match;
-
-    /* Return failure if the match length is less than 2:
-     */
-    if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
-
-    /* The check at best_len-1 can be removed because it will be made
-     * again later. (This heuristic is not always a win.)
-     * It is not necessary to compare scan[2] and match[2] since they
-     * are always equal when the other bytes match, given that
-     * the hash keys are equal and that HASH_BITS >= 8.
-     */
-    scan += 2, match += 2;
-    Assert(*scan == *match, "match[2]?");
-
-    /* We check for insufficient lookahead only every 8th comparison;
-     * the 256th check will be made at strstart+258.
-     */
-    do {
-    } while (*++scan == *++match && *++scan == *++match &&
-             *++scan == *++match && *++scan == *++match &&
-             *++scan == *++match && *++scan == *++match &&
-             *++scan == *++match && *++scan == *++match &&
-             scan < strend);
-
-    Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
-
-    len = MAX_MATCH - (int)(strend - scan);
-
-    if (len < MIN_MATCH) return MIN_MATCH - 1;
-
-    s->match_start = cur_match;
-    return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
-}
-
-#ifdef DEBUG
-/* ===========================================================================
- * Check that the match at match_start is indeed a match.
- */
-local void check_match(s, start, match, length)
-    deflate_state *s;
-    IPos start, match;
-    int length;
-{
-    /* check that the match is indeed a match */
-    if (zmemcmp(s->window + match,
-                s->window + start, length) != EQUAL) {
-        fprintf(stderr, " start %u, match %u, length %d\n",
-                start, match, length);
-        do {
-            fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
-        } while (--length != 0);
-        z_error("invalid match");
-    }
-    if (z_verbose > 1) {
-        fprintf(stderr,"\\[%d,%d]", start-match, length);
-        do { putc(s->window[start++], stderr); } while (--length != 0);
-    }
-}
-#else
-#  define check_match(s, start, match, length)
-#endif /* DEBUG */
-
-/* ===========================================================================
- * Fill the window when the lookahead becomes insufficient.
- * Updates strstart and lookahead.
- *
- * IN assertion: lookahead < MIN_LOOKAHEAD
- * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
- *    At least one byte has been read, or avail_in == 0; reads are
- *    performed for at least two bytes (required for the zip translate_eol
- *    option -- not supported here).
- */
-local void fill_window(s)
-    deflate_state *s;
-{
-    register unsigned n, m;
-    register Posf *p;
-    unsigned more;    /* Amount of free space at the end of the window. */
-    uInt wsize = s->w_size;
-
-    do {
-        more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
-
-        /* Deal with !@#$% 64K limit: */
-        if (sizeof(int) <= 2) {
-            if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
-                more = wsize;
-
-            } else if (more == (unsigned)(-1)) {
-                /* Very unlikely, but possible on 16 bit machine if
-                 * strstart == 0 && lookahead == 1 (input done a byte at time)
-                 */
-                more--;
-            }
-        }
-
-        /* If the window is almost full and there is insufficient lookahead,
-         * move the upper half to the lower one to make room in the upper half.
-         */
-        if (s->strstart >= wsize+MAX_DIST(s)) {
-
-            zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
-            s->match_start -= wsize;
-            s->strstart    -= wsize; /* we now have strstart >= MAX_DIST */
-            s->block_start -= (long) wsize;
-
-            /* Slide the hash table (could be avoided with 32 bit values
-               at the expense of memory usage). We slide even when level == 0
-               to keep the hash table consistent if we switch back to level > 0
-               later. (Using level 0 permanently is not an optimal usage of
-               zlib, so we don't care about this pathological case.)
-             */
-            n = s->hash_size;
-            p = &s->head[n];
-            do {
-                m = *--p;
-                *p = (Pos)(m >= wsize ? m-wsize : NIL);
-            } while (--n);
-
-            n = wsize;
-#ifndef FASTEST
-            p = &s->prev[n];
-            do {
-                m = *--p;
-                *p = (Pos)(m >= wsize ? m-wsize : NIL);
-                /* If n is not on any hash chain, prev[n] is garbage but
-                 * its value will never be used.
-                 */
-            } while (--n);
-#endif
-            more += wsize;
-        }
-        if (s->strm->avail_in == 0) return;
-
-        /* If there was no sliding:
-         *    strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
-         *    more == window_size - lookahead - strstart
-         * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
-         * => more >= window_size - 2*WSIZE + 2
-         * In the BIG_MEM or MMAP case (not yet supported),
-         *   window_size == input_size + MIN_LOOKAHEAD  &&
-         *   strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
-         * Otherwise, window_size == 2*WSIZE so more >= 2.
-         * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
-         */
-        Assert(more >= 2, "more < 2");
-
-        n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
-        s->lookahead += n;
-
-        /* Initialize the hash value now that we have some input: */
-        if (s->lookahead >= MIN_MATCH) {
-            s->ins_h = s->window[s->strstart];
-            UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
-#if MIN_MATCH != 3
-            Call UPDATE_HASH() MIN_MATCH-3 more times
-#endif
-        }
-        /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
-         * but this is not important since only literal bytes will be emitted.
-         */
-
-    } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
-}
-
-/* ===========================================================================
- * Flush the current block, with given end-of-file flag.
- * IN assertion: strstart is set to the end of the current match.
- */
-#define FLUSH_BLOCK_ONLY(s, eof) { \
-   _tr_flush_block(s, (s->block_start >= 0L ? \
-                   (charf *)&s->window[(unsigned)s->block_start] : \
-                   (charf *)Z_NULL), \
-                (ulg)((long)s->strstart - s->block_start), \
-                (eof)); \
-   s->block_start = s->strstart; \
-   flush_pending(s->strm); \
-   Tracev((stderr,"[FLUSH]")); \
-}
-
-/* Same but force premature exit if necessary. */
-#define FLUSH_BLOCK(s, eof) { \
-   FLUSH_BLOCK_ONLY(s, eof); \
-   if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
-}
-
-/* ===========================================================================
- * Copy without compression as much as possible from the input stream, return
- * the current block state.
- * This function does not insert new strings in the dictionary since
- * uncompressible data is probably not useful. This function is used
- * only for the level=0 compression option.
- * NOTE: this function should be optimized to avoid extra copying from
- * window to pending_buf.
- */
-local block_state deflate_stored(s, flush)
-    deflate_state *s;
-    int flush;
-{
-    /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
-     * to pending_buf_size, and each stored block has a 5 byte header:
-     */
-    ulg max_block_size = 0xffff;
-    ulg max_start;
-
-    if (max_block_size > s->pending_buf_size - 5) {
-        max_block_size = s->pending_buf_size - 5;
-    }
-
-    /* Copy as much as possible from input to output: */
-    for (;;) {
-        /* Fill the window as much as possible: */
-        if (s->lookahead <= 1) {
-
-            Assert(s->strstart < s->w_size+MAX_DIST(s) ||
-                   s->block_start >= (long)s->w_size, "slide too late");
-
-            fill_window(s);
-            if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
-
-            if (s->lookahead == 0) break; /* flush the current block */
-        }
-        Assert(s->block_start >= 0L, "block gone");
-
-        s->strstart += s->lookahead;
-        s->lookahead = 0;
-
-        /* Emit a stored block if pending_buf will be full: */
-        max_start = s->block_start + max_block_size;
-        if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
-            /* strstart == 0 is possible when wraparound on 16-bit machine */
-            s->lookahead = (uInt)(s->strstart - max_start);
-            s->strstart = (uInt)max_start;
-            FLUSH_BLOCK(s, 0);
-        }
-        /* Flush if we may have to slide, otherwise block_start may become
-         * negative and the data will be gone:
-         */
-        if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
-            FLUSH_BLOCK(s, 0);
-        }
-    }
-    FLUSH_BLOCK(s, flush == Z_FINISH);
-    return flush == Z_FINISH ? finish_done : block_done;
-}
-
-/* ===========================================================================
- * Compress as much as possible from the input stream, return the current
- * block state.
- * This function does not perform lazy evaluation of matches and inserts
- * new strings in the dictionary only for unmatched strings or for short
- * matches. It is used only for the fast compression options.
- */
-local block_state deflate_fast(s, flush)
-    deflate_state *s;
-    int flush;
-{
-    IPos hash_head = NIL; /* head of the hash chain */
-    int bflush;           /* set if current block must be flushed */
-
-    for (;;) {
-        /* Make sure that we always have enough lookahead, except
-         * at the end of the input file. We need MAX_MATCH bytes
-         * for the next match, plus MIN_MATCH bytes to insert the
-         * string following the next match.
-         */
-        if (s->lookahead < MIN_LOOKAHEAD) {
-            fill_window(s);
-            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
-                return need_more;
-            }
-            if (s->lookahead == 0) break; /* flush the current block */
-        }
-
-        /* Insert the string window[strstart .. strstart+2] in the
-         * dictionary, and set hash_head to the head of the hash chain:
-         */
-        if (s->lookahead >= MIN_MATCH) {
-            INSERT_STRING(s, s->strstart, hash_head);
-        }
-
-        /* Find the longest match, discarding those <= prev_length.
-         * At this point we have always match_length < MIN_MATCH
-         */
-        if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {
-            /* To simplify the code, we prevent matches with the string
-             * of window index 0 (in particular we have to avoid a match
-             * of the string with itself at the start of the input file).
-             */
-#ifdef FASTEST
-            if ((s->strategy < Z_HUFFMAN_ONLY) ||
-                (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
-                s->match_length = longest_match_fast (s, hash_head);
-            }
-#else
-            if (s->strategy < Z_HUFFMAN_ONLY) {
-                s->match_length = longest_match (s, hash_head);
-            } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
-                s->match_length = longest_match_fast (s, hash_head);
-            }
-#endif
-            /* longest_match() or longest_match_fast() sets match_start */
-        }
-        if (s->match_length >= MIN_MATCH) {
-            check_match(s, s->strstart, s->match_start, s->match_length);
-
-            _tr_tally_dist(s, s->strstart - s->match_start,
-                           s->match_length - MIN_MATCH, bflush);
-
-            s->lookahead -= s->match_length;
-
-            /* Insert new strings in the hash table only if the match length
-             * is not too large. This saves time but degrades compression.
-             */
-#ifndef FASTEST
-            if (s->match_length <= s->max_insert_length &&
-                s->lookahead >= MIN_MATCH) {
-                s->match_length--; /* string at strstart already in table */
-                do {
-                    s->strstart++;
-                    INSERT_STRING(s, s->strstart, hash_head);
-                    /* strstart never exceeds WSIZE-MAX_MATCH, so there are
-                     * always MIN_MATCH bytes ahead.
-                     */
-                } while (--s->match_length != 0);
-                s->strstart++;
-            } else
-#endif
-            {
-                s->strstart += s->match_length;
-                s->match_length = 0;
-                s->ins_h = s->window[s->strstart];
-                UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
-#if MIN_MATCH != 3
-                Call UPDATE_HASH() MIN_MATCH-3 more times
-#endif
-                /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
-                 * matter since it will be recomputed at next deflate call.
-                 */
-            }
-        } else {
-            /* No match, output a literal byte */
-            Tracevv((stderr,"%c", s->window[s->strstart]));
-            _tr_tally_lit (s, s->window[s->strstart], bflush);
-            s->lookahead--;
-            s->strstart++;
-        }
-        if (bflush) FLUSH_BLOCK(s, 0);
-    }
-    FLUSH_BLOCK(s, flush == Z_FINISH);
-    return flush == Z_FINISH ? finish_done : block_done;
-}
-
-#ifndef FASTEST
-/* ===========================================================================
- * Same as above, but achieves better compression. We use a lazy
- * evaluation for matches: a match is finally adopted only if there is
- * no better match at the next window position.
- */
-local block_state deflate_slow(s, flush)
-    deflate_state *s;
-    int flush;
-{
-    IPos hash_head = NIL;    /* head of hash chain */
-    int bflush;              /* set if current block must be flushed */
-
-    /* Process the input block. */
-    for (;;) {
-        /* Make sure that we always have enough lookahead, except
-         * at the end of the input file. We need MAX_MATCH bytes
-         * for the next match, plus MIN_MATCH bytes to insert the
-         * string following the next match.
-         */
-        if (s->lookahead < MIN_LOOKAHEAD) {
-            fill_window(s);
-            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
-                return need_more;
-            }
-            if (s->lookahead == 0) break; /* flush the current block */
-        }
-
-        /* Insert the string window[strstart .. strstart+2] in the
-         * dictionary, and set hash_head to the head of the hash chain:
-         */
-        if (s->lookahead >= MIN_MATCH) {
-            INSERT_STRING(s, s->strstart, hash_head);
-        }
-
-        /* Find the longest match, discarding those <= prev_length.
-         */
-        s->prev_length = s->match_length, s->prev_match = s->match_start;
-        s->match_length = MIN_MATCH-1;
-
-        if (hash_head != NIL && s->prev_length < s->max_lazy_match &&
-            s->strstart - hash_head <= MAX_DIST(s)) {
-            /* To simplify the code, we prevent matches with the string
-             * of window index 0 (in particular we have to avoid a match
-             * of the string with itself at the start of the input file).
-             */
-            if (s->strategy < Z_HUFFMAN_ONLY) {
-                s->match_length = longest_match (s, hash_head);
-            } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
-                s->match_length = longest_match_fast (s, hash_head);
-            }
-            /* longest_match() or longest_match_fast() sets match_start */
-
-            if (s->match_length <= 5 && (s->strategy == Z_FILTERED
-#if TOO_FAR <= 32767
-                || (s->match_length == MIN_MATCH &&
-                    s->strstart - s->match_start > TOO_FAR)
-#endif
-                )) {
-
-                /* If prev_match is also MIN_MATCH, match_start is garbage
-                 * but we will ignore the current match anyway.
-                 */
-                s->match_length = MIN_MATCH-1;
-            }
-        }
-        /* If there was a match at the previous step and the current
-         * match is not better, output the previous match:
-         */
-        if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {
-            uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;
-            /* Do not insert strings in hash table beyond this. */
-
-            check_match(s, s->strstart-1, s->prev_match, s->prev_length);
-
-            _tr_tally_dist(s, s->strstart -1 - s->prev_match,
-                           s->prev_length - MIN_MATCH, bflush);
-
-            /* Insert in hash table all strings up to the end of the match.
-             * strstart-1 and strstart are already inserted. If there is not
-             * enough lookahead, the last two strings are not inserted in
-             * the hash table.
-             */
-            s->lookahead -= s->prev_length-1;
-            s->prev_length -= 2;
-            do {
-                if (++s->strstart <= max_insert) {
-                    INSERT_STRING(s, s->strstart, hash_head);
-                }
-            } while (--s->prev_length != 0);
-            s->match_available = 0;
-            s->match_length = MIN_MATCH-1;
-            s->strstart++;
-
-            if (bflush) FLUSH_BLOCK(s, 0);
-
-        } else if (s->match_available) {
-            /* If there was no match at the previous position, output a
-             * single literal. If there was a match but the current match
-             * is longer, truncate the previous match to a single literal.
-             */
-            Tracevv((stderr,"%c", s->window[s->strstart-1]));
-            _tr_tally_lit(s, s->window[s->strstart-1], bflush);
-            if (bflush) {
-                FLUSH_BLOCK_ONLY(s, 0);
-            }
-            s->strstart++;
-            s->lookahead--;
-            if (s->strm->avail_out == 0) return need_more;
-        } else {
-            /* There is no previous match to compare with, wait for
-             * the next step to decide.
-             */
-            s->match_available = 1;
-            s->strstart++;
-            s->lookahead--;
-        }
-    }
-    Assert (flush != Z_NO_FLUSH, "no flush?");
-    if (s->match_available) {
-        Tracevv((stderr,"%c", s->window[s->strstart-1]));
-        _tr_tally_lit(s, s->window[s->strstart-1], bflush);
-        s->match_available = 0;
-    }
-    FLUSH_BLOCK(s, flush == Z_FINISH);
-    return flush == Z_FINISH ? finish_done : block_done;
-}
-#endif /* FASTEST */

sys/src/cmd/gs/zlib/deflate.h

@@ -1,334 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* deflate.h -- internal compression state
- * Copyright (C) 1995-2002 Jean-loup Gailly
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
-   part of the implementation of the compression library and is
-   subject to change. Applications should only use zlib.h.
- */
-
-/* @(#) $Id: deflate.h,v 1.1.1.1 2005/04/24 21:39:40 giles Exp $ */
-
-#ifndef DEFLATE_H
-#define DEFLATE_H
-
-#include "zutil.h"
-
-/* define NO_GZIP when compiling if you want to disable gzip header and
-   trailer creation by deflate().  NO_GZIP would be used to avoid linking in
-   the crc code when it is not needed.  For shared libraries, gzip encoding
-   should be left enabled. */
-#ifndef NO_GZIP
-#  define GZIP
-#endif
-
-/* ===========================================================================
- * Internal compression state.
- */
-
-#define LENGTH_CODES 29
-/* number of length codes, not counting the special END_BLOCK code */
-
-#define LITERALS  256
-/* number of literal bytes 0..255 */
-
-#define L_CODES (LITERALS+1+LENGTH_CODES)
-/* number of Literal or Length codes, including the END_BLOCK code */
-
-#define D_CODES   30
-/* number of distance codes */
-
-#define BL_CODES  19
-/* number of codes used to transfer the bit lengths */
-
-#define HEAP_SIZE (2*L_CODES+1)
-/* maximum heap size */
-
-#define MAX_BITS 15
-/* All codes must not exceed MAX_BITS bits */
-
-#define INIT_STATE    42
-#define BUSY_STATE   113
-#define FINISH_STATE 666
-/* Stream status */
-
-
-/* Data structure describing a single value and its code string. */
-typedef struct ct_data_s {
-    union {
-        ush  freq;       /* frequency count */
-        ush  code;       /* bit string */
-    } fc;
-    union {
-        ush  dad;        /* father node in Huffman tree */
-        ush  len;        /* length of bit string */
-    } dl;
-} FAR ct_data;
-
-#define Freq fc.freq
-#define Code fc.code
-#define Dad  dl.dad
-#define Len  dl.len
-
-typedef struct static_tree_desc_s  static_tree_desc;
-
-typedef struct tree_desc_s {
-    ct_data *dyn_tree;           /* the dynamic tree */
-    int     max_code;            /* largest code with non zero frequency */
-    static_tree_desc *stat_desc; /* the corresponding static tree */
-} FAR tree_desc;
-
-typedef ush Pos;
-typedef Pos FAR Posf;
-typedef unsigned IPos;
-
-/* A Pos is an index in the character window. We use short instead of int to
- * save space in the various tables. IPos is used only for parameter passing.
- */
-
-typedef struct internal_state {
-    z_streamp strm;      /* pointer back to this zlib stream */
-    int   status;        /* as the name implies */
-    Bytef *pending_buf;  /* output still pending */
-    ulg   pending_buf_size; /* size of pending_buf */
-    Bytef *pending_out;  /* next pending byte to output to the stream */
-    int   pending;       /* nb of bytes in the pending buffer */
-    int   wrap;          /* bit 0 true for zlib, bit 1 true for gzip */
-    Byte  method;        /* STORED (for zip only) or DEFLATED */
-    int   last_flush;    /* value of flush param for previous deflate call */
-
-                /* used by deflate.c: */
-
-    uInt  w_size;        /* LZ77 window size (32K by default) */
-    uInt  w_bits;        /* log2(w_size)  (8..16) */
-    uInt  w_mask;        /* w_size - 1 */
-
-    Bytef *window;
-    /* Sliding window. Input bytes are read into the second half of the window,
-     * and move to the first half later to keep a dictionary of at least wSize
-     * bytes. With this organization, matches are limited to a distance of
-     * wSize-MAX_MATCH bytes, but this ensures that IO is always
-     * performed with a length multiple of the block size. Also, it limits
-     * the window size to 64K, which is quite useful on MSDOS.
-     * To do: use the user input buffer as sliding window.
-     */
-
-    ulg window_size;
-    /* Actual size of window: 2*wSize, except when the user input buffer
-     * is directly used as sliding window.
-     */
-
-    Posf *prev;
-    /* Link to older string with same hash index. To limit the size of this
-     * array to 64K, this link is maintained only for the last 32K strings.
-     * An index in this array is thus a window index modulo 32K.
-     */
-
-    Posf *head; /* Heads of the hash chains or NIL. */
-
-    uInt  ins_h;          /* hash index of string to be inserted */
-    uInt  hash_size;      /* number of elements in hash table */
-    uInt  hash_bits;      /* log2(hash_size) */
-    uInt  hash_mask;      /* hash_size-1 */
-
-    uInt  hash_shift;
-    /* Number of bits by which ins_h must be shifted at each input
-     * step. It must be such that after MIN_MATCH steps, the oldest
-     * byte no longer takes part in the hash key, that is:
-     *   hash_shift * MIN_MATCH >= hash_bits
-     */
-
-    long block_start;
-    /* Window position at the beginning of the current output block. Gets
-     * negative when the window is moved backwards.
-     */
-
-    uInt match_length;           /* length of best match */
-    IPos prev_match;             /* previous match */
-    int match_available;         /* set if previous match exists */
-    uInt strstart;               /* start of string to insert */
-    uInt match_start;            /* start of matching string */
-    uInt lookahead;              /* number of valid bytes ahead in window */
-
-    uInt prev_length;
-    /* Length of the best match at previous step. Matches not greater than this
-     * are discarded. This is used in the lazy match evaluation.
-     */
-
-    uInt max_chain_length;
-    /* To speed up deflation, hash chains are never searched beyond this
-     * length.  A higher limit improves compression ratio but degrades the
-     * speed.
-     */
-
-    uInt max_lazy_match;
-    /* Attempt to find a better match only when the current match is strictly
-     * smaller than this value. This mechanism is used only for compression
-     * levels >= 4.
-     */
-#   define max_insert_length  max_lazy_match
-    /* Insert new strings in the hash table only if the match length is not
-     * greater than this length. This saves time but degrades compression.
-     * max_insert_length is used only for compression levels <= 3.
-     */
-
-    int level;    /* compression level (1..9) */
-    int strategy; /* favor or force Huffman coding*/
-
-    uInt good_match;
-    /* Use a faster search when the previous match is longer than this */
-
-    int nice_match; /* Stop searching when current match exceeds this */
-
-                /* used by trees.c: */
-    /* Didn't use ct_data typedef below to supress compiler warning */
-    struct ct_data_s dyn_ltree[HEAP_SIZE];   /* literal and length tree */
-    struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
-    struct ct_data_s bl_tree[2*BL_CODES+1];  /* Huffman tree for bit lengths */
-
-    struct tree_desc_s l_desc;               /* desc. for literal tree */
-    struct tree_desc_s d_desc;               /* desc. for distance tree */
-    struct tree_desc_s bl_desc;              /* desc. for bit length tree */
-
-    ush bl_count[MAX_BITS+1];
-    /* number of codes at each bit length for an optimal tree */
-
-    int heap[2*L_CODES+1];      /* heap used to build the Huffman trees */
-    int heap_len;               /* number of elements in the heap */
-    int heap_max;               /* element of largest frequency */
-    /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
-     * The same heap array is used to build all trees.
-     */
-
-    uch depth[2*L_CODES+1];
-    /* Depth of each subtree used as tie breaker for trees of equal frequency
-     */
-
-    uchf *l_buf;          /* buffer for literals or lengths */
-
-    uInt  lit_bufsize;
-    /* Size of match buffer for literals/lengths.  There are 4 reasons for
-     * limiting lit_bufsize to 64K:
-     *   - frequencies can be kept in 16 bit counters
-     *   - if compression is not successful for the first block, all input
-     *     data is still in the window so we can still emit a stored block even
-     *     when input comes from standard input.  (This can also be done for
-     *     all blocks if lit_bufsize is not greater than 32K.)
-     *   - if compression is not successful for a file smaller than 64K, we can
-     *     even emit a stored file instead of a stored block (saving 5 bytes).
-     *     This is applicable only for zip (not gzip or zlib).
-     *   - creating new Huffman trees less frequently may not provide fast
-     *     adaptation to changes in the input data statistics. (Take for
-     *     example a binary file with poorly compressible code followed by
-     *     a highly compressible string table.) Smaller buffer sizes give
-     *     fast adaptation but have of course the overhead of transmitting
-     *     trees more frequently.
-     *   - I can't count above 4
-     */
-
-    uInt last_lit;      /* running index in l_buf */
-
-    ushf *d_buf;
-    /* Buffer for distances. To simplify the code, d_buf and l_buf have
-     * the same number of elements. To use different lengths, an extra flag
-     * array would be necessary.
-     */
-
-    ulg opt_len;        /* bit length of current block with optimal trees */
-    ulg static_len;     /* bit length of current block with static trees */
-    uInt matches;       /* number of string matches in current block */
-    int last_eob_len;   /* bit length of EOB code for last block */
-
-#ifdef DEBUG
-    ulg compressed_len; /* total bit length of compressed file mod 2^32 */
-    ulg bits_sent;      /* bit length of compressed data sent mod 2^32 */
-#endif
-
-    ush bi_buf;
-    /* Output buffer. bits are inserted starting at the bottom (least
-     * significant bits).
-     */
-    int bi_valid;
-    /* Number of valid bits in bi_buf.  All bits above the last valid bit
-     * are always zero.
-     */
-
-} FAR deflate_state;
-
-/* Output a byte on the stream.
- * IN assertion: there is enough room in pending_buf.
- */
-#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
-
-
-#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
-/* Minimum amount of lookahead, except at the end of the input file.
- * See deflate.c for comments about the MIN_MATCH+1.
- */
-
-#define MAX_DIST(s)  ((s)->w_size-MIN_LOOKAHEAD)
-/* In order to simplify the code, particularly on 16 bit machines, match
- * distances are limited to MAX_DIST instead of WSIZE.
- */
-
-        /* in trees.c */
-void _tr_init         OF((deflate_state *s));
-int  _tr_tally        OF((deflate_state *s, unsigned dist, unsigned lc));
-void _tr_flush_block  OF((deflate_state *s, charf *buf, ulg stored_len,
-                          int eof));
-void _tr_align        OF((deflate_state *s));
-void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
-                          int eof));
-
-#define d_code(dist) \
-   ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
-/* Mapping from a distance to a distance code. dist is the distance - 1 and
- * must not have side effects. _dist_code[256] and _dist_code[257] are never
- * used.
- */
-
-#ifndef DEBUG
-/* Inline versions of _tr_tally for speed: */
-
-#if defined(GEN_TREES_H) || !defined(STDC)
-  extern uch _length_code[];
-  extern uch _dist_code[];
-#else
-  extern const uch _length_code[];
-  extern const uch _dist_code[];
-#endif
-
-# define _tr_tally_lit(s, c, flush) \
-  { uch cc = (c); \
-    s->d_buf[s->last_lit] = 0; \
-    s->l_buf[s->last_lit++] = cc; \
-    s->dyn_ltree[cc].Freq++; \
-    flush = (s->last_lit == s->lit_bufsize-1); \
-   }
-# define _tr_tally_dist(s, distance, length, flush) \
-  { uch len = (length); \
-    ush dist = (distance); \
-    s->d_buf[s->last_lit] = dist; \
-    s->l_buf[s->last_lit++] = len; \
-    dist--; \
-    s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
-    s->dyn_dtree[d_code(dist)].Freq++; \
-    flush = (s->last_lit == s->lit_bufsize-1); \
-  }
-#else
-# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
-# define _tr_tally_dist(s, distance, length, flush) \
-              flush = _tr_tally(s, distance, length)
-#endif
-
-#endif /* DEFLATE_H */

sys/src/cmd/gs/zlib/example.c

@@ -1,576 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id: example.c,v 1.1.1.1 2005/04/24 21:39:37 giles Exp $ */
-
-#include <stdio.h>
-#include "zlib.h"
-
-#ifdef STDC
-#  include <string.h>
-#  include <stdlib.h>
-#else
-   extern void exit  OF((int));
-#endif
-
-#if defined(VMS) || defined(RISCOS)
-#  define TESTFILE "foo-gz"
-#else
-#  define TESTFILE "foo.gz"
-#endif
-
-#define CHECK_ERR(err, msg) { \
-    if (err != Z_OK) { \
-        fprintf(stderr, "%s error: %d\n", msg, err); \
-        exit(1); \
-    } \
-}
-
-const char hello[] = "hello, hello!";
-/* "hello world" would be more standard, but the repeated "hello"
- * stresses the compression code better, sorry...
- */
-
-const char dictionary[] = "hello";
-uLong dictId; /* Adler32 value of the dictionary */
-
-void test_compress      OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_gzio          OF((const char *fname,
-                            Byte *uncompr, uLong uncomprLen));
-void test_deflate       OF((Byte *compr, uLong comprLen));
-void test_inflate       OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_large_deflate OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_large_inflate OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_flush         OF((Byte *compr, uLong *comprLen));
-void test_sync          OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_dict_deflate  OF((Byte *compr, uLong comprLen));
-void test_dict_inflate  OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-int  main               OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Test compress() and uncompress()
- */
-void test_compress(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    uLong len = (uLong)strlen(hello)+1;
-
-    err = compress(compr, &comprLen, (const Bytef*)hello, len);
-    CHECK_ERR(err, "compress");
-
-    strcpy((char*)uncompr, "garbage");
-
-    err = uncompress(uncompr, &uncomprLen, compr, comprLen);
-    CHECK_ERR(err, "uncompress");
-
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad uncompress\n");
-        exit(1);
-    } else {
-        printf("uncompress(): %s\n", (char *)uncompr);
-    }
-}
-
-/* ===========================================================================
- * Test read/write of .gz files
- */
-void test_gzio(fname, uncompr, uncomprLen)
-    const char *fname; /* compressed file name */
-    Byte *uncompr;
-    uLong uncomprLen;
-{
-#ifdef NO_GZCOMPRESS
-    fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
-#else
-    int err;
-    int len = (int)strlen(hello)+1;
-    gzFile file;
-    z_off_t pos;
-
-    file = gzopen(fname, "wb");
-    if (file == NULL) {
-        fprintf(stderr, "gzopen error\n");
-        exit(1);
-    }
-    gzputc(file, 'h');
-    if (gzputs(file, "ello") != 4) {
-        fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    if (gzprintf(file, ", %s!", "hello") != 8) {
-        fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
-    gzclose(file);
-
-    file = gzopen(fname, "rb");
-    if (file == NULL) {
-        fprintf(stderr, "gzopen error\n");
-        exit(1);
-    }
-    strcpy((char*)uncompr, "garbage");
-
-    if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
-        fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
-        exit(1);
-    } else {
-        printf("gzread(): %s\n", (char*)uncompr);
-    }
-
-    pos = gzseek(file, -8L, SEEK_CUR);
-    if (pos != 6 || gztell(file) != pos) {
-        fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
-                (int32_t)pos, (int32_t)gztell(file));
-        exit(1);
-    }
-
-    if (gzgetc(file) != ' ') {
-        fprintf(stderr, "gzgetc error\n");
-        exit(1);
-    }
-
-    if (gzungetc(' ', file) != ' ') {
-        fprintf(stderr, "gzungetc error\n");
-        exit(1);
-    }
-
-    gzgets(file, (char*)uncompr, (int)uncomprLen);
-    if (strlen((char*)uncompr) != 7) { /* " hello!" */
-        fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    if (strcmp((char*)uncompr, hello + 6)) {
-        fprintf(stderr, "bad gzgets after gzseek\n");
-        exit(1);
-    } else {
-        printf("gzgets() after gzseek: %s\n", (char*)uncompr);
-    }
-
-    gzclose(file);
-#endif
-}
-
-/* ===========================================================================
- * Test deflate() with small buffers
- */
-void test_deflate(compr, comprLen)
-    Byte *compr;
-    uLong comprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-    uLong len = (uLong)strlen(hello)+1;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
-    CHECK_ERR(err, "deflateInit");
-
-    c_stream.next_in  = (Bytef*)hello;
-    c_stream.next_out = compr;
-
-    while (c_stream.total_in != len && c_stream.total_out < comprLen) {
-        c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
-        err = deflate(&c_stream, Z_NO_FLUSH);
-        CHECK_ERR(err, "deflate");
-    }
-    /* Finish the stream, still forcing small buffers: */
-    for (;;) {
-        c_stream.avail_out = 1;
-        err = deflate(&c_stream, Z_FINISH);
-        if (err == Z_STREAM_END) break;
-        CHECK_ERR(err, "deflate");
-    }
-
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with small buffers
- */
-void test_inflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = 0;
-    d_stream.next_out = uncompr;
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
-        d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
-        err = inflate(&d_stream, Z_NO_FLUSH);
-        if (err == Z_STREAM_END) break;
-        CHECK_ERR(err, "inflate");
-    }
-
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad inflate\n");
-        exit(1);
-    } else {
-        printf("inflate(): %s\n", (char *)uncompr);
-    }
-}
-
-/* ===========================================================================
- * Test deflate() with large buffers and dynamic change of compression level
- */
-void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_BEST_SPEED);
-    CHECK_ERR(err, "deflateInit");
-
-    c_stream.next_out = compr;
-    c_stream.avail_out = (uInt)comprLen;
-
-    /* At this point, uncompr is still mostly zeroes, so it should compress
-     * very well:
-     */
-    c_stream.next_in = uncompr;
-    c_stream.avail_in = (uInt)uncomprLen;
-    err = deflate(&c_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "deflate");
-    if (c_stream.avail_in != 0) {
-        fprintf(stderr, "deflate not greedy\n");
-        exit(1);
-    }
-
-    /* Feed in already compressed data and switch to no compression: */
-    deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
-    c_stream.next_in = compr;
-    c_stream.avail_in = (uInt)comprLen/2;
-    err = deflate(&c_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "deflate");
-
-    /* Switch back to compressing mode: */
-    deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
-    c_stream.next_in = uncompr;
-    c_stream.avail_in = (uInt)uncomprLen;
-    err = deflate(&c_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "deflate");
-
-    err = deflate(&c_stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        fprintf(stderr, "deflate should report Z_STREAM_END\n");
-        exit(1);
-    }
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with large buffers
- */
-void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = (uInt)comprLen;
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    for (;;) {
-        d_stream.next_out = uncompr;            /* discard the output */
-        d_stream.avail_out = (uInt)uncomprLen;
-        err = inflate(&d_stream, Z_NO_FLUSH);
-        if (err == Z_STREAM_END) break;
-        CHECK_ERR(err, "large inflate");
-    }
-
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
-        fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
-        exit(1);
-    } else {
-        printf("large_inflate(): OK\n");
-    }
-}
-
-/* ===========================================================================
- * Test deflate() with full flush
- */
-void test_flush(compr, comprLen)
-    Byte *compr;
-    uLong *comprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-    uInt len = (uInt)strlen(hello)+1;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
-    CHECK_ERR(err, "deflateInit");
-
-    c_stream.next_in  = (Bytef*)hello;
-    c_stream.next_out = compr;
-    c_stream.avail_in = 3;
-    c_stream.avail_out = (uInt)*comprLen;
-    err = deflate(&c_stream, Z_FULL_FLUSH);
-    CHECK_ERR(err, "deflate");
-
-    compr[3]++; /* force an error in first compressed block */
-    c_stream.avail_in = len - 3;
-
-    err = deflate(&c_stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        CHECK_ERR(err, "deflate");
-    }
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-
-    *comprLen = c_stream.total_out;
-}
-
-/* ===========================================================================
- * Test inflateSync()
- */
-void test_sync(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = 2; /* just read the zlib header */
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    d_stream.next_out = uncompr;
-    d_stream.avail_out = (uInt)uncomprLen;
-
-    inflate(&d_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "inflate");
-
-    d_stream.avail_in = (uInt)comprLen-2;   /* read all compressed data */
-    err = inflateSync(&d_stream);           /* but skip the damaged part */
-    CHECK_ERR(err, "inflateSync");
-
-    err = inflate(&d_stream, Z_FINISH);
-    if (err != Z_DATA_ERROR) {
-        fprintf(stderr, "inflate should report DATA_ERROR\n");
-        /* Because of incorrect adler32 */
-        exit(1);
-    }
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    printf("after inflateSync(): hel%s\n", (char *)uncompr);
-}
-
-/* ===========================================================================
- * Test deflate() with preset dictionary
- */
-void test_dict_deflate(compr, comprLen)
-    Byte *compr;
-    uLong comprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
-    CHECK_ERR(err, "deflateInit");
-
-    err = deflateSetDictionary(&c_stream,
-                               (const Bytef*)dictionary, sizeof(dictionary));
-    CHECK_ERR(err, "deflateSetDictionary");
-
-    dictId = c_stream.adler;
-    c_stream.next_out = compr;
-    c_stream.avail_out = (uInt)comprLen;
-
-    c_stream.next_in = (Bytef*)hello;
-    c_stream.avail_in = (uInt)strlen(hello)+1;
-
-    err = deflate(&c_stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        fprintf(stderr, "deflate should report Z_STREAM_END\n");
-        exit(1);
-    }
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with a preset dictionary
- */
-void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = (uInt)comprLen;
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    d_stream.next_out = uncompr;
-    d_stream.avail_out = (uInt)uncomprLen;
-
-    for (;;) {
-        err = inflate(&d_stream, Z_NO_FLUSH);
-        if (err == Z_STREAM_END) break;
-        if (err == Z_NEED_DICT) {
-            if (d_stream.adler != dictId) {
-                fprintf(stderr, "unexpected dictionary");
-                exit(1);
-            }
-            err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
-                                       sizeof(dictionary));
-        }
-        CHECK_ERR(err, "inflate with dict");
-    }
-
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad inflate with dict\n");
-        exit(1);
-    } else {
-        printf("inflate with dictionary: %s\n", (char *)uncompr);
-    }
-}
-
-/* ===========================================================================
- * Usage:  example [output.gz  [input.gz]]
- */
-
-int main(argc, argv)
-    int argc;
-    char *argv[];
-{
-    Byte *compr, *uncompr;
-    uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
-    uLong uncomprLen = comprLen;
-    static const char* myVersion = ZLIB_VERSION;
-
-    if (zlibVersion()[0] != myVersion[0]) {
-        fprintf(stderr, "incompatible zlib version\n");
-        exit(1);
-
-    } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
-        fprintf(stderr, "warning: different zlib version\n");
-    }
-
-    printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
-            ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
-
-    compr    = (Byte*)calloc((uInt)comprLen, 1);
-    uncompr  = (Byte*)calloc((uInt)uncomprLen, 1);
-    /* compr and uncompr are cleared to avoid reading uninitialized
-     * data and to ensure that uncompr compresses well.
-     */
-    if (compr == Z_NULL || uncompr == Z_NULL) {
-        printf("out of memory\n");
-        exit(1);
-    }
-    test_compress(compr, comprLen, uncompr, uncomprLen);
-
-    test_gzio((argc > 1 ? argv[1] : TESTFILE),
-              uncompr, uncomprLen);
-
-    test_deflate(compr, comprLen);
-    test_inflate(compr, comprLen, uncompr, uncomprLen);
-
-    test_large_deflate(compr, comprLen, uncompr, uncomprLen);
-    test_large_inflate(compr, comprLen, uncompr, uncomprLen);
-
-    test_flush(compr, &comprLen);
-    test_sync(compr, comprLen, uncompr, uncomprLen);
-    comprLen = uncomprLen;
-
-    test_dict_deflate(compr, comprLen);
-    test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
-
-    free(compr);
-    free(uncompr);
-
-    return 0;
-}

sys/src/cmd/gs/zlib/infback.c

@@ -1,631 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
-   This code is largely copied from inflate.c.  Normally either infback.o or
-   inflate.o would be linked into an application--not both.  The interface
-   with inffast.c is retained so that optimized assembler-coded versions of
-   inflate_fast() can be used with either inflate.c or infback.c.
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-/* function prototypes */
-local void fixedtables OF((struct inflate_state FAR *state));
-
-/*
-   strm provides memory allocation functions in zalloc and zfree, or
-   Z_NULL to use the library memory allocation functions.
-
-   windowBits is in the range 8..15, and window is a user-supplied
-   window and output buffer that is 2**windowBits bytes.
- */
-int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
-z_stream FAR *strm;
-int windowBits;
-unsigned char FAR *window;
-const char *version;
-int stream_size;
-{
-    struct inflate_state FAR *state;
-
-    if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
-        stream_size != (int)(sizeof(z_stream)))
-        return Z_VERSION_ERROR;
-    if (strm == Z_NULL || window == Z_NULL ||
-        windowBits < 8 || windowBits > 15)
-        return Z_STREAM_ERROR;
-    strm->msg = Z_NULL;                 /* in case we return an error */
-    if (strm->zalloc == (alloc_func)0) {
-        strm->zalloc = zcalloc;
-        strm->opaque = (voidpf)0;
-    }
-    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
-    state = (struct inflate_state FAR *)ZALLOC(strm, 1,
-                                               sizeof(struct inflate_state));
-    if (state == Z_NULL) return Z_MEM_ERROR;
-    Tracev((stderr, "inflate: allocated\n"));
-    strm->state = (voidpf)state;
-    state->wbits = windowBits;
-    state->wsize = 1U << windowBits;
-    state->window = window;
-    state->write = 0;
-    state->whave = 0;
-    return Z_OK;
-}
-
-/*
-   Return state with length and distance decoding tables and index sizes set to
-   fixed code decoding.  Normally this returns fixed tables from inffixed.h.
-   If BUILDFIXED is defined, then instead this routine builds the tables the
-   first time it's called, and returns those tables the first time and
-   thereafter.  This reduces the size of the code by about 2K bytes, in
-   exchange for a little execution time.  However, BUILDFIXED should not be
-   used for threaded applications, since the rewriting of the tables and virgin
-   may not be thread-safe.
- */
-local void fixedtables(state)
-struct inflate_state FAR *state;
-{
-#ifdef BUILDFIXED
-    static int virgin = 1;
-    static code *lenfix, *distfix;
-    static code fixed[544];
-
-    /* build fixed huffman tables if first call (may not be thread safe) */
-    if (virgin) {
-        unsigned sym, bits;
-        static code *next;
-
-        /* literal/length table */
-        sym = 0;
-        while (sym < 144) state->lens[sym++] = 8;
-        while (sym < 256) state->lens[sym++] = 9;
-        while (sym < 280) state->lens[sym++] = 7;
-        while (sym < 288) state->lens[sym++] = 8;
-        next = fixed;
-        lenfix = next;
-        bits = 9;
-        inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
-
-        /* distance table */
-        sym = 0;
-        while (sym < 32) state->lens[sym++] = 5;
-        distfix = next;
-        bits = 5;
-        inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
-
-        /* do this just once */
-        virgin = 0;
-    }
-#else /* !BUILDFIXED */
-#   include "inffixed.h"
-#endif /* BUILDFIXED */
-    state->lencode = lenfix;
-    state->lenbits = 9;
-    state->distcode = distfix;
-    state->distbits = 5;
-}
-
-/* Macros for inflateBack(): */
-
-/* Load returned state from inflate_fast() */
-#define LOAD() \
-    do { \
-        put = strm->next_out; \
-        left = strm->avail_out; \
-        next = strm->next_in; \
-        have = strm->avail_in; \
-        hold = state->hold; \
-        bits = state->bits; \
-    } while (0)
-
-/* Set state from registers for inflate_fast() */
-#define RESTORE() \
-    do { \
-        strm->next_out = put; \
-        strm->avail_out = left; \
-        strm->next_in = next; \
-        strm->avail_in = have; \
-        state->hold = hold; \
-        state->bits = bits; \
-    } while (0)
-
-/* Clear the input bit accumulator */
-#define INITBITS() \
-    do { \
-        hold = 0; \
-        bits = 0; \
-    } while (0)
-
-/* Assure that some input is available.  If input is requested, but denied,
-   then return a Z_BUF_ERROR from inflateBack(). */
-#define PULL() \
-    do { \
-        if (have == 0) { \
-            have = in(in_desc, &next); \
-            if (have == 0) { \
-                next = Z_NULL; \
-                ret = Z_BUF_ERROR; \
-                goto inf_leave; \
-            } \
-        } \
-    } while (0)
-
-/* Get a byte of input into the bit accumulator, or return from inflateBack()
-   with an error if there is no input available. */
-#define PULLBYTE() \
-    do { \
-        PULL(); \
-        have--; \
-        hold += (unsigned long)(*next++) << bits; \
-        bits += 8; \
-    } while (0)
-
-/* Assure that there are at least n bits in the bit accumulator.  If there is
-   not enough available input to do that, then return from inflateBack() with
-   an error. */
-#define NEEDBITS(n) \
-    do { \
-        while (bits < (unsigned)(n)) \
-            PULLBYTE(); \
-    } while (0)
-
-/* Return the low n bits of the bit accumulator (n < 16) */
-#define BITS(n) \
-    ((unsigned)hold & ((1U << (n)) - 1))
-
-/* Remove n bits from the bit accumulator */
-#define DROPBITS(n) \
-    do { \
-        hold >>= (n); \
-        bits -= (unsigned)(n); \
-    } while (0)
-
-/* Remove zero to seven bits as needed to go to a byte boundary */
-#define BYTEBITS() \
-    do { \
-        hold >>= bits & 7; \
-        bits -= bits & 7; \
-    } while (0)
-
-/* Assure that some output space is available, by writing out the window
-   if it's full.  If the write fails, return from inflateBack() with a
-   Z_BUF_ERROR. */
-#define ROOM() \
-    do { \
-        if (left == 0) { \
-            put = state->window; \
-            left = state->wsize; \
-            state->whave = left; \
-            if (out(out_desc, put, left)) { \
-                ret = Z_BUF_ERROR; \
-                goto inf_leave; \
-            } \
-        } \
-    } while (0)
-
-/*
-   strm provides the memory allocation functions and window buffer on input,
-   and provides information on the unused input on return.  For Z_DATA_ERROR
-   returns, strm will also provide an error message.
-
-   in() and out() are the call-back input and output functions.  When
-   inflateBack() needs more input, it calls in().  When inflateBack() has
-   filled the window with output, or when it completes with data in the
-   window, it calls out() to write out the data.  The application must not
-   change the provided input until in() is called again or inflateBack()
-   returns.  The application must not change the window/output buffer until
-   inflateBack() returns.
-
-   in() and out() are called with a descriptor parameter provided in the
-   inflateBack() call.  This parameter can be a structure that provides the
-   information required to do the read or write, as well as accumulated
-   information on the input and output such as totals and check values.
-
-   in() should return zero on failure.  out() should return non-zero on
-   failure.  If either in() or out() fails, than inflateBack() returns a
-   Z_BUF_ERROR.  strm->next_in can be checked for Z_NULL to see whether it
-   was in() or out() that caused in the error.  Otherwise,  inflateBack()
-   returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
-   error, or Z_MEM_ERROR if it could not allocate memory for the state.
-   inflateBack() can also return Z_STREAM_ERROR if the input parameters
-   are not correct, i.e. strm is Z_NULL or the state was not initialized.
- */
-int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
-z_stream FAR *strm;
-in_func in;
-void FAR *in_desc;
-out_func out;
-void FAR *out_desc;
-{
-    struct inflate_state FAR *state;
-    unsigned char FAR *next;    /* next input */
-    unsigned char FAR *put;     /* next output */
-    unsigned have, left;        /* available input and output */
-    unsigned long hold;         /* bit buffer */
-    unsigned bits;              /* bits in bit buffer */
-    unsigned copy;              /* number of stored or match bytes to copy */
-    unsigned char FAR *from;    /* where to copy match bytes from */
-    code this;                  /* current decoding table entry */
-    code last;                  /* parent table entry */
-    unsigned len;               /* length to copy for repeats, bits to drop */
-    int ret;                    /* return code */
-    static const unsigned short order[19] = /* permutation of code lengths */
-        {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
-    /* Check that the strm exists and that the state was initialized */
-    if (strm == Z_NULL || strm->state == Z_NULL)
-        return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-
-    /* Reset the state */
-    strm->msg = Z_NULL;
-    state->mode = TYPE;
-    state->last = 0;
-    state->whave = 0;
-    next = strm->next_in;
-    have = next != Z_NULL ? strm->avail_in : 0;
-    hold = 0;
-    bits = 0;
-    put = state->window;
-    left = state->wsize;
-
-    /* Inflate until end of block marked as last */
-    for (;;)
-        switch (state->mode) {
-        case TYPE:
-            /* determine and dispatch block type */
-            if (state->last) {
-                BYTEBITS();
-                state->mode = DONE;
-                break;
-            }
-            NEEDBITS(3);
-            state->last = BITS(1);
-            DROPBITS(1);
-            switch (BITS(2)) {
-            case 0:                             /* stored block */
-                Tracev((stderr, "inflate:     stored block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = STORED;
-                break;
-            case 1:                             /* fixed block */
-                fixedtables(state);
-                Tracev((stderr, "inflate:     fixed codes block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = LEN;              /* decode codes */
-                break;
-            case 2:                             /* dynamic block */
-                Tracev((stderr, "inflate:     dynamic codes block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = TABLE;
-                break;
-            case 3:
-                strm->msg = (char *)"invalid block type";
-                state->mode = BAD;
-            }
-            DROPBITS(2);
-            break;
-
-        case STORED:
-            /* get and verify stored block length */
-            BYTEBITS();                         /* go to byte boundary */
-            NEEDBITS(32);
-            if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
-                strm->msg = (char *)"invalid stored block lengths";
-                state->mode = BAD;
-                break;
-            }
-            state->length = (unsigned)hold & 0xffff;
-            Tracev((stderr, "inflate:       stored length %u\n",
-                    state->length));
-            INITBITS();
-
-            /* copy stored block from input to output */
-            while (state->length != 0) {
-                copy = state->length;
-                PULL();
-                ROOM();
-                if (copy > have) copy = have;
-                if (copy > left) copy = left;
-                zmemcpy(put, next, copy);
-                have -= copy;
-                next += copy;
-                left -= copy;
-                put += copy;
-                state->length -= copy;
-            }
-            Tracev((stderr, "inflate:       stored end\n"));
-            state->mode = TYPE;
-            break;
-
-        case TABLE:
-            /* get dynamic table entries descriptor */
-            NEEDBITS(14);
-            state->nlen = BITS(5) + 257;
-            DROPBITS(5);
-            state->ndist = BITS(5) + 1;
-            DROPBITS(5);
-            state->ncode = BITS(4) + 4;
-            DROPBITS(4);
-#ifndef PKZIP_BUG_WORKAROUND
-            if (state->nlen > 286 || state->ndist > 30) {
-                strm->msg = (char *)"too many length or distance symbols";
-                state->mode = BAD;
-                break;
-            }
-#endif
-            Tracev((stderr, "inflate:       table sizes ok\n"));
-
-            /* get code length code lengths (not a typo) */
-            state->have = 0;
-            while (state->have < state->ncode) {
-                NEEDBITS(3);
-                state->lens[order[state->have++]] = (unsigned short)BITS(3);
-                DROPBITS(3);
-            }
-            while (state->have < 19)
-                state->lens[order[state->have++]] = 0;
-            state->next = state->codes;
-            state->lencode = (code const FAR *)(state->next);
-            state->lenbits = 7;
-            ret = inflate_table(CODES, state->lens, 19, &(state->next),
-                                &(state->lenbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid code lengths set";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:       code lengths ok\n"));
-
-            /* get length and distance code code lengths */
-            state->have = 0;
-            while (state->have < state->nlen + state->ndist) {
-                for (;;) {
-                    this = state->lencode[BITS(state->lenbits)];
-                    if ((unsigned)(this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                if (this.val < 16) {
-                    NEEDBITS(this.bits);
-                    DROPBITS(this.bits);
-                    state->lens[state->have++] = this.val;
-                }
-                else {
-                    if (this.val == 16) {
-                        NEEDBITS(this.bits + 2);
-                        DROPBITS(this.bits);
-                        if (state->have == 0) {
-                            strm->msg = (char *)"invalid bit length repeat";
-                            state->mode = BAD;
-                            break;
-                        }
-                        len = (unsigned)(state->lens[state->have - 1]);
-                        copy = 3 + BITS(2);
-                        DROPBITS(2);
-                    }
-                    else if (this.val == 17) {
-                        NEEDBITS(this.bits + 3);
-                        DROPBITS(this.bits);
-                        len = 0;
-                        copy = 3 + BITS(3);
-                        DROPBITS(3);
-                    }
-                    else {
-                        NEEDBITS(this.bits + 7);
-                        DROPBITS(this.bits);
-                        len = 0;
-                        copy = 11 + BITS(7);
-                        DROPBITS(7);
-                    }
-                    if (state->have + copy > state->nlen + state->ndist) {
-                        strm->msg = (char *)"invalid bit length repeat";
-                        state->mode = BAD;
-                        break;
-                    }
-                    while (copy--)
-                        state->lens[state->have++] = (unsigned short)len;
-                }
-            }
-
-            /* handle error breaks in while */
-            if (state->mode == BAD) break;
-
-            /* build code tables */
-            state->next = state->codes;
-            state->lencode = (code const FAR *)(state->next);
-            state->lenbits = 9;
-            ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
-                                &(state->lenbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid literal/lengths set";
-                state->mode = BAD;
-                break;
-            }
-            state->distcode = (code const FAR *)(state->next);
-            state->distbits = 6;
-            ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
-                            &(state->next), &(state->distbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid distances set";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:       codes ok\n"));
-            state->mode = LEN;
-
-        case LEN:
-            /* use inflate_fast() if we have enough input and output */
-            if (have >= 6 && left >= 258) {
-                RESTORE();
-                if (state->whave < state->wsize)
-                    state->whave = state->wsize - left;
-                inflate_fast(strm, state->wsize);
-                LOAD();
-                break;
-            }
-
-            /* get a literal, length, or end-of-block code */
-            for (;;) {
-                this = state->lencode[BITS(state->lenbits)];
-                if ((unsigned)(this.bits) <= bits) break;
-                PULLBYTE();
-            }
-            if (this.op && (this.op & 0xf0) == 0) {
-                last = this;
-                for (;;) {
-                    this = state->lencode[last.val +
-                            (BITS(last.bits + last.op) >> last.bits)];
-                    if ((unsigned)(last.bits + this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                DROPBITS(last.bits);
-            }
-            DROPBITS(this.bits);
-            state->length = (unsigned)this.val;
-
-            /* process literal */
-            if (this.op == 0) {
-                Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
-                        "inflate:         literal '%c'\n" :
-                        "inflate:         literal 0x%02x\n", this.val));
-                ROOM();
-                *put++ = (unsigned char)(state->length);
-                left--;
-                state->mode = LEN;
-                break;
-            }
-
-            /* process end of block */
-            if (this.op & 32) {
-                Tracevv((stderr, "inflate:         end of block\n"));
-                state->mode = TYPE;
-                break;
-            }
-
-            /* invalid code */
-            if (this.op & 64) {
-                strm->msg = (char *)"invalid literal/length code";
-                state->mode = BAD;
-                break;
-            }
-
-            /* length code -- get extra bits, if any */
-            state->extra = (unsigned)(this.op) & 15;
-            if (state->extra != 0) {
-                NEEDBITS(state->extra);
-                state->length += BITS(state->extra);
-                DROPBITS(state->extra);
-            }
-            Tracevv((stderr, "inflate:         length %u\n", state->length));
-
-            /* get distance code */
-            for (;;) {
-                this = state->distcode[BITS(state->distbits)];
-                if ((unsigned)(this.bits) <= bits) break;
-                PULLBYTE();
-            }
-            if ((this.op & 0xf0) == 0) {
-                last = this;
-                for (;;) {
-                    this = state->distcode[last.val +
-                            (BITS(last.bits + last.op) >> last.bits)];
-                    if ((unsigned)(last.bits + this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                DROPBITS(last.bits);
-            }
-            DROPBITS(this.bits);
-            if (this.op & 64) {
-                strm->msg = (char *)"invalid distance code";
-                state->mode = BAD;
-                break;
-            }
-            state->offset = (unsigned)this.val;
-
-            /* get distance extra bits, if any */
-            state->extra = (unsigned)(this.op) & 15;
-            if (state->extra != 0) {
-                NEEDBITS(state->extra);
-                state->offset += BITS(state->extra);
-                DROPBITS(state->extra);
-            }
-            if (state->offset > state->wsize - (state->whave < state->wsize ?
-                                                left : 0)) {
-                strm->msg = (char *)"invalid distance too far back";
-                state->mode = BAD;
-                break;
-            }
-            Tracevv((stderr, "inflate:         distance %u\n", state->offset));
-
-            /* copy match from window to output */
-            do {
-                ROOM();
-                copy = state->wsize - state->offset;
-                if (copy < left) {
-                    from = put + copy;
-                    copy = left - copy;
-                }
-                else {
-                    from = put - state->offset;
-                    copy = left;
-                }
-                if (copy > state->length) copy = state->length;
-                state->length -= copy;
-                left -= copy;
-                do {
-                    *put++ = *from++;
-                } while (--copy);
-            } while (state->length != 0);
-            break;
-
-        case DONE:
-            /* inflate stream terminated properly -- write leftover output */
-            ret = Z_STREAM_END;
-            if (left < state->wsize) {
-                if (out(out_desc, state->window, state->wsize - left))
-                    ret = Z_BUF_ERROR;
-            }
-            goto inf_leave;
-
-        case BAD:
-            ret = Z_DATA_ERROR;
-            goto inf_leave;
-
-        default:                /* can't happen, but makes compilers happy */
-            ret = Z_STREAM_ERROR;
-            goto inf_leave;
-        }
-
-    /* Return unused input */
-  inf_leave:
-    strm->next_in = next;
-    strm->avail_in = have;
-    return ret;
-}
-
-int ZEXPORT inflateBackEnd(strm)
-z_stream FAR *strm;
-{
-    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
-        return Z_STREAM_ERROR;
-    ZFREE(strm, strm->state);
-    strm->state = Z_NULL;
-    Tracev((stderr, "inflate: end\n"));
-    return Z_OK;
-}

sys/src/cmd/gs/zlib/inffast.c

@@ -1,314 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* inffast.c -- fast decoding
- * Copyright (C) 1995-2004 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-#ifndef ASMINF
-
-/* Allow machine dependent optimization for post-increment or pre-increment.
-   Based on testing to date,
-   Pre-increment preferred for:
-   - PowerPC G3 (Adler)
-   - MIPS R5000 (Randers-Pehrson)
-   Post-increment preferred for:
-   - none
-   No measurable difference:
-   - Pentium III (Anderson)
-   - M68060 (Nikl)
- */
-#ifdef POSTINC
-#  define OFF 0
-#  define PUP(a) *(a)++
-#else
-#  define OFF 1
-#  define PUP(a) *++(a)
-#endif
-
-/*
-   Decode literal, length, and distance codes and write out the resulting
-   literal and match bytes until either not enough input or output is
-   available, an end-of-block is encountered, or a data error is encountered.
-   When large enough input and output buffers are supplied to inflate(), for
-   example, a 16K input buffer and a 64K output buffer, more than 95% of the
-   inflate execution time is spent in this routine.
-
-   Entry assumptions:
-
-        state->mode == LEN
-        strm->avail_in >= 6
-        strm->avail_out >= 258
-        start >= strm->avail_out
-        state->bits < 8
-
-   On return, state->mode is one of:
-
-        LEN -- ran out of enough output space or enough available input
-        TYPE -- reached end of block code, inflate() to interpret next block
-        BAD -- error in block data
-
-   Notes:
-
-    - The maximum input bits used by a length/distance pair is 15 bits for the
-      length code, 5 bits for the length extra, 15 bits for the distance code,
-      and 13 bits for the distance extra.  This totals 48 bits, or six bytes.
-      Therefore if strm->avail_in >= 6, then there is enough input to avoid
-      checking for available input while decoding.
-
-    - The maximum bytes that a single length/distance pair can output is 258
-      bytes, which is the maximum length that can be coded.  inflate_fast()
-      requires strm->avail_out >= 258 for each loop to avoid checking for
-      output space.
- */
-void inflate_fast(strm, start)
-z_streamp strm;
-unsigned start;         /* inflate()'s starting value for strm->avail_out */
-{
-    struct inflate_state FAR *state;
-    unsigned char FAR *in;      /* local strm->next_in */
-    unsigned char FAR *last;    /* while in < last, enough input available */
-    unsigned char FAR *out;     /* local strm->next_out */
-    unsigned char FAR *beg;     /* inflate()'s initial strm->next_out */
-    unsigned char FAR *end;     /* while out < end, enough space available */
-    unsigned wsize;             /* window size or zero if not using window */
-    unsigned whave;             /* valid bytes in the window */
-    unsigned write;             /* window write index */
-    unsigned char FAR *window;  /* allocated sliding window, if wsize != 0 */
-    unsigned long hold;         /* local strm->hold */
-    unsigned bits;              /* local strm->bits */
-    code const FAR *lcode;      /* local strm->lencode */
-    code const FAR *dcode;      /* local strm->distcode */
-    unsigned lmask;             /* mask for first level of length codes */
-    unsigned dmask;             /* mask for first level of distance codes */
-    code this;                  /* retrieved table entry */
-    unsigned op;                /* code bits, operation, extra bits, or */
-                                /*  window position, window bytes to copy */
-    unsigned len;               /* match length, unused bytes */
-    unsigned dist;              /* match distance */
-    unsigned char FAR *from;    /* where to copy match from */
-
-    /* copy state to local variables */
-    state = (struct inflate_state FAR *)strm->state;
-    in = strm->next_in - OFF;
-    last = in + (strm->avail_in - 5);
-    out = strm->next_out - OFF;
-    beg = out - (start - strm->avail_out);
-    end = out + (strm->avail_out - 257);
-    wsize = state->wsize;
-    whave = state->whave;
-    write = state->write;
-    window = state->window;
-    hold = state->hold;
-    bits = state->bits;
-    lcode = state->lencode;
-    dcode = state->distcode;
-    lmask = (1U << state->lenbits) - 1;
-    dmask = (1U << state->distbits) - 1;
-
-    /* decode literals and length/distances until end-of-block or not enough
-       input data or output space */
-    do {
-        if (bits < 15) {
-            hold += (unsigned long)(PUP(in)) << bits;
-            bits += 8;
-            hold += (unsigned long)(PUP(in)) << bits;
-            bits += 8;
-        }
-        this = lcode[hold & lmask];
-      dolen:
-        op = (unsigned)(this.bits);
-        hold >>= op;
-        bits -= op;
-        op = (unsigned)(this.op);
-        if (op == 0) {                          /* literal */
-            Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
-                    "inflate:         literal '%c'\n" :
-                    "inflate:         literal 0x%02x\n", this.val));
-            PUP(out) = (unsigned char)(this.val);
-        }
-        else if (op & 16) {                     /* length base */
-            len = (unsigned)(this.val);
-            op &= 15;                           /* number of extra bits */
-            if (op) {
-                if (bits < op) {
-                    hold += (unsigned long)(PUP(in)) << bits;
-                    bits += 8;
-                }
-                len += (unsigned)hold & ((1U << op) - 1);
-                hold >>= op;
-                bits -= op;
-            }
-            Tracevv((stderr, "inflate:         length %u\n", len));
-            if (bits < 15) {
-                hold += (unsigned long)(PUP(in)) << bits;
-                bits += 8;
-                hold += (unsigned long)(PUP(in)) << bits;
-                bits += 8;
-            }
-            this = dcode[hold & dmask];
-          dodist:
-            op = (unsigned)(this.bits);
-            hold >>= op;
-            bits -= op;
-            op = (unsigned)(this.op);
-            if (op & 16) {                      /* distance base */
-                dist = (unsigned)(this.val);
-                op &= 15;                       /* number of extra bits */
-                if (bits < op) {
-                    hold += (unsigned long)(PUP(in)) << bits;
-                    bits += 8;
-                    if (bits < op) {
-                        hold += (unsigned long)(PUP(in)) << bits;
-                        bits += 8;
-                    }
-                }
-                dist += (unsigned)hold & ((1U << op) - 1);
-                hold >>= op;
-                bits -= op;
-                Tracevv((stderr, "inflate:         distance %u\n", dist));
-                op = (unsigned)(out - beg);     /* max distance in output */
-                if (dist > op) {                /* see if copy from window */
-                    op = dist - op;             /* distance back in window */
-                    if (op > whave) {
-                        strm->msg = (char *)"invalid distance too far back";
-                        state->mode = BAD;
-                        break;
-                    }
-                    from = window - OFF;
-                    if (write == 0) {           /* very common case */
-                        from += wsize - op;
-                        if (op < len) {         /* some from window */
-                            len -= op;
-                            do {
-                                PUP(out) = PUP(from);
-                            } while (--op);
-                            from = out - dist;  /* rest from output */
-                        }
-                    }
-                    else if (write < op) {      /* wrap around window */
-                        from += wsize + write - op;
-                        op -= write;
-                        if (op < len) {         /* some from end of window */
-                            len -= op;
-                            do {
-                                PUP(out) = PUP(from);
-                            } while (--op);
-                            from = window - OFF;
-                            if (write < len) {  /* some from start of window */
-                                op = write;
-                                len -= op;
-                                do {
-                                    PUP(out) = PUP(from);
-                                } while (--op);
-                                from = out - dist;      /* rest from output */
-                            }
-                        }
-                    }
-                    else {                      /* contiguous in window */
-                        from += write - op;
-                        if (op < len) {         /* some from window */
-                            len -= op;
-                            do {
-                                PUP(out) = PUP(from);
-                            } while (--op);
-                            from = out - dist;  /* rest from output */
-                        }
-                    }
-                    while (len > 2) {
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
-                        len -= 3;
-                    }
-                    if (len) {
-                        PUP(out) = PUP(from);
-                        if (len > 1)
-                            PUP(out) = PUP(from);
-                    }
-                }
-                else {
-                    from = out - dist;          /* copy direct from output */
-                    do {                        /* minimum length is three */
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
-                        len -= 3;
-                    } while (len > 2);
-                    if (len) {
-                        PUP(out) = PUP(from);
-                        if (len > 1)
-                            PUP(out) = PUP(from);
-                    }
-                }
-            }
-            else if ((op & 64) == 0) {          /* 2nd level distance code */
-                this = dcode[this.val + (hold & ((1U << op) - 1))];
-                goto dodist;
-            }
-            else {
-                strm->msg = (char *)"invalid distance code";
-                state->mode = BAD;
-                break;
-            }
-        }
-        else if ((op & 64) == 0) {              /* 2nd level length code */
-            this = lcode[this.val + (hold & ((1U << op) - 1))];
-            goto dolen;
-        }
-        else if (op & 32) {                     /* end-of-block */
-            Tracevv((stderr, "inflate:         end of block\n"));
-            state->mode = TYPE;
-            break;
-        }
-        else {
-            strm->msg = (char *)"invalid literal/length code";
-            state->mode = BAD;
-            break;
-        }
-    } while (in < last && out < end);
-
-    /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
-    len = bits >> 3;
-    in -= len;
-    bits -= len << 3;
-    hold &= (1U << bits) - 1;
-
-    /* update state and return */
-    strm->next_in = in + OFF;
-    strm->next_out = out + OFF;
-    strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
-    strm->avail_out = (unsigned)(out < end ?
-                                 257 + (end - out) : 257 - (out - end));
-    state->hold = hold;
-    state->bits = bits;
-    return;
-}
-
-/*
-   inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
-   - Using bit fields for code structure
-   - Different op definition to avoid & for extra bits (do & for table bits)
-   - Three separate decoding do-loops for direct, window, and write == 0
-   - Special case for distance > 1 copies to do overlapped load and store copy
-   - Explicit branch predictions (based on measured branch probabilities)
-   - Deferring match copy and interspersed it with decoding subsequent codes
-   - Swapping literal/length else
-   - Swapping window/direct else
-   - Larger unrolled copy loops (three is about right)
-   - Moving len -= 3 statement into middle of loop
- */
-
-#endif /* !ASMINF */

sys/src/cmd/gs/zlib/inffixed.h

@@ -1,103 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-    /* inffixed.h -- table for decoding fixed codes
-     * Generated automatically by makefixed().
-     */
-
-    /* WARNING: this file should *not* be used by applications. It
-       is part of the implementation of the compression library and
-       is subject to change. Applications should only use zlib.h.
-     */
-
-    static const code lenfix[512] = {
-        {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
-        {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
-        {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
-        {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
-        {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
-        {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
-        {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
-        {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
-        {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
-        {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
-        {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
-        {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
-        {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
-        {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
-        {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
-        {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
-        {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
-        {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
-        {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
-        {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
-        {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
-        {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
-        {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
-        {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
-        {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
-        {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
-        {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
-        {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
-        {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
-        {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
-        {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
-        {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
-        {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
-        {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
-        {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
-        {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
-        {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
-        {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
-        {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
-        {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
-        {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
-        {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
-        {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
-        {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
-        {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
-        {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
-        {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
-        {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
-        {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
-        {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
-        {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
-        {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
-        {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
-        {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
-        {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
-        {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
-        {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
-        {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
-        {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
-        {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
-        {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
-        {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
-        {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
-        {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
-        {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
-        {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
-        {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
-        {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
-        {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
-        {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
-        {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
-        {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
-        {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
-        {0,9,255}
-    };
-
-    static const code distfix[32] = {
-        {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
-        {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
-        {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
-        {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
-        {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
-        {22,5,193},{64,5,0}
-    };

sys/src/cmd/gs/zlib/inflate.c

@@ -1,1283 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* inflate.c -- zlib decompression
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * Change history:
- *
- * 1.2.beta0    24 Nov 2002
- * - First version -- complete rewrite of inflate to simplify code, avoid
- *   creation of window when not needed, minimize use of window when it is
- *   needed, make inffast.c even faster, implement gzip decoding, and to
- *   improve code readability and style over the previous zlib inflate code
- *
- * 1.2.beta1    25 Nov 2002
- * - Use pointers for available input and output checking in inffast.c
- * - Remove input and output counters in inffast.c
- * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
- * - Remove unnecessary second byte pull from length extra in inffast.c
- * - Unroll direct copy to three copies per loop in inffast.c
- *
- * 1.2.beta2    4 Dec 2002
- * - Change external routine names to reduce potential conflicts
- * - Correct filename to inffixed.h for fixed tables in inflate.c
- * - Make hbuf[] unsigned char to match parameter type in inflate.c
- * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
- *   to avoid negation problem on Alphas (64 bit) in inflate.c
- *
- * 1.2.beta3    22 Dec 2002
- * - Add comments on state->bits assertion in inffast.c
- * - Add comments on op field in inftrees.h
- * - Fix bug in reuse of allocated window after inflateReset()
- * - Remove bit fields--back to byte structure for speed
- * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
- * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
- * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
- * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
- * - Use local copies of stream next and avail values, as well as local bit
- *   buffer and bit count in inflate()--for speed when inflate_fast() not used
- *
- * 1.2.beta4    1 Jan 2003
- * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
- * - Move a comment on output buffer sizes from inffast.c to inflate.c
- * - Add comments in inffast.c to introduce the inflate_fast() routine
- * - Rearrange window copies in inflate_fast() for speed and simplification
- * - Unroll last copy for window match in inflate_fast()
- * - Use local copies of window variables in inflate_fast() for speed
- * - Pull out common write == 0 case for speed in inflate_fast()
- * - Make op and len in inflate_fast() unsigned for consistency
- * - Add FAR to lcode and dcode declarations in inflate_fast()
- * - Simplified bad distance check in inflate_fast()
- * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
- *   source file infback.c to provide a call-back interface to inflate for
- *   programs like gzip and unzip -- uses window as output buffer to avoid
- *   window copying
- *
- * 1.2.beta5    1 Jan 2003
- * - Improved inflateBack() interface to allow the caller to provide initial
- *   input in strm.
- * - Fixed stored blocks bug in inflateBack()
- *
- * 1.2.beta6    4 Jan 2003
- * - Added comments in inffast.c on effectiveness of POSTINC
- * - Typecasting all around to reduce compiler warnings
- * - Changed loops from while (1) or do {} while (1) to for (;;), again to
- *   make compilers happy
- * - Changed type of window in inflateBackInit() to unsigned char *
- *
- * 1.2.beta7    27 Jan 2003
- * - Changed many types to unsigned or unsigned short to avoid warnings
- * - Added inflateCopy() function
- *
- * 1.2.0        9 Mar 2003
- * - Changed inflateBack() interface to provide separate opaque descriptors
- *   for the in() and out() functions
- * - Changed inflateBack() argument and in_func typedef to swap the length
- *   and buffer address return values for the input function
- * - Check next_in and next_out for Z_NULL on entry to inflate()
- *
- * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-#ifdef MAKEFIXED
-#  ifndef BUILDFIXED
-#    define BUILDFIXED
-#  endif
-#endif
-
-/* function prototypes */
-local void fixedtables OF((struct inflate_state FAR *state));
-local int updatewindow OF((z_streamp strm, unsigned out));
-#ifdef BUILDFIXED
-   void makefixed OF((void));
-#endif
-local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
-                              unsigned len));
-
-int ZEXPORT inflateReset(strm)
-z_streamp strm;
-{
-    struct inflate_state FAR *state;
-
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    strm->total_in = strm->total_out = state->total = 0;
-    strm->msg = Z_NULL;
-    strm->adler = 1;        /* to support ill-conceived Java test suite */
-    state->mode = HEAD;
-    state->last = 0;
-    state->havedict = 0;
-    state->wsize = 0;
-    state->whave = 0;
-    state->hold = 0;
-    state->bits = 0;
-    state->lencode = state->distcode = state->next = state->codes;
-    Tracev((stderr, "inflate: reset\n"));
-    return Z_OK;
-}
-
-int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
-z_streamp strm;
-int windowBits;
-const char *version;
-int stream_size;
-{
-    struct inflate_state FAR *state;
-
-    if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
-        stream_size != (int)(sizeof(z_stream)))
-        return Z_VERSION_ERROR;
-    if (strm == Z_NULL) return Z_STREAM_ERROR;
-    strm->msg = Z_NULL;                 /* in case we return an error */
-    if (strm->zalloc == (alloc_func)0) {
-        strm->zalloc = zcalloc;
-        strm->opaque = (voidpf)0;
-    }
-    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
-    state = (struct inflate_state FAR *)
-            ZALLOC(strm, 1, sizeof(struct inflate_state));
-    if (state == Z_NULL) return Z_MEM_ERROR;
-    Tracev((stderr, "inflate: allocated\n"));
-    strm->state = (voidpf)state;
-    if (windowBits < 0) {
-        state->wrap = 0;
-        windowBits = -windowBits;
-    }
-    else {
-        state->wrap = (windowBits >> 4) + 1;
-#ifdef GUNZIP
-        if (windowBits < 48) windowBits &= 15;
-#endif
-    }
-    if (windowBits < 8 || windowBits > 15) {
-        ZFREE(strm, state);
-        strm->state = Z_NULL;
-        return Z_STREAM_ERROR;
-    }
-    state->wbits = (unsigned)windowBits;
-    state->window = Z_NULL;
-    return inflateReset(strm);
-}
-
-int ZEXPORT inflateInit_(strm, version, stream_size)
-z_streamp strm;
-const char *version;
-int stream_size;
-{
-    return inflateInit2_(strm, DEF_WBITS, version, stream_size);
-}
-
-/*
-   Return state with length and distance decoding tables and index sizes set to
-   fixed code decoding.  Normally this returns fixed tables from inffixed.h.
-   If BUILDFIXED is defined, then instead this routine builds the tables the
-   first time it's called, and returns those tables the first time and
-   thereafter.  This reduces the size of the code by about 2K bytes, in
-   exchange for a little execution time.  However, BUILDFIXED should not be
-   used for threaded applications, since the rewriting of the tables and virgin
-   may not be thread-safe.
- */
-local void fixedtables(state)
-struct inflate_state FAR *state;
-{
-#ifdef BUILDFIXED
-    static int virgin = 1;
-    static code *lenfix, *distfix;
-    static code fixed[544];
-
-    /* build fixed huffman tables if first call (may not be thread safe) */
-    if (virgin) {
-        unsigned sym, bits;
-        static code *next;
-
-        /* literal/length table */
-        sym = 0;
-        while (sym < 144) state->lens[sym++] = 8;
-        while (sym < 256) state->lens[sym++] = 9;
-        while (sym < 280) state->lens[sym++] = 7;
-        while (sym < 288) state->lens[sym++] = 8;
-        next = fixed;
-        lenfix = next;
-        bits = 9;
-        inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
-
-        /* distance table */
-        sym = 0;
-        while (sym < 32) state->lens[sym++] = 5;
-        distfix = next;
-        bits = 5;
-        inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
-
-        /* do this just once */
-        virgin = 0;
-    }
-#else /* !BUILDFIXED */
-#   include "inffixed.h"
-#endif /* BUILDFIXED */
-    state->lencode = lenfix;
-    state->lenbits = 9;
-    state->distcode = distfix;
-    state->distbits = 5;
-}
-
-#ifdef MAKEFIXED
-#include <stdio.h>
-
-/*
-   Write out the inffixed.h that is #include'd above.  Defining MAKEFIXED also
-   defines BUILDFIXED, so the tables are built on the fly.  makefixed() writes
-   those tables to stdout, which would be piped to inffixed.h.  A small program
-   can simply call makefixed to do this:
-
-    void makefixed(void);
-
-    int main(void)
-    {
-        makefixed();
-        return 0;
-    }
-
-   Then that can be linked with zlib built with MAKEFIXED defined and run:
-
-    a.out > inffixed.h
- */
-void makefixed()
-{
-    unsigned low, size;
-    struct inflate_state state;
-
-    fixedtables(&state);
-    puts("    /* inffixed.h -- table for decoding fixed codes");
-    puts("     * Generated automatically by makefixed().");
-    puts("     */");
-    puts("");
-    puts("    /* WARNING: this file should *not* be used by applications.");
-    puts("       It is part of the implementation of this library and is");
-    puts("       subject to change. Applications should only use zlib.h.");
-    puts("     */");
-    puts("");
-    size = 1U << 9;
-    printf("    static const code lenfix[%u] = {", size);
-    low = 0;
-    for (;;) {
-        if ((low % 7) == 0) printf("\n        ");
-        printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
-               state.lencode[low].val);
-        if (++low == size) break;
-        putchar(',');
-    }
-    puts("\n    };");
-    size = 1U << 5;
-    printf("\n    static const code distfix[%u] = {", size);
-    low = 0;
-    for (;;) {
-        if ((low % 6) == 0) printf("\n        ");
-        printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,
-               state.distcode[low].val);
-        if (++low == size) break;
-        putchar(',');
-    }
-    puts("\n    };");
-}
-#endif /* MAKEFIXED */
-
-/*
-   Update the window with the last wsize (normally 32K) bytes written before
-   returning.  If window does not exist yet, create it.  This is only called
-   when a window is already in use, or when output has been written during this
-   inflate call, but the end of the deflate stream has not been reached yet.
-   It is also called to create a window for dictionary data when a dictionary
-   is loaded.
-
-   Providing output buffers larger than 32K to inflate() should provide a speed
-   advantage, since only the last 32K of output is copied to the sliding window
-   upon return from inflate(), and since all distances after the first 32K of
-   output will fall in the output data, making match copies simpler and faster.
-   The advantage may be dependent on the size of the processor's data caches.
- */
-local int updatewindow(strm, out)
-z_streamp strm;
-unsigned out;
-{
-    struct inflate_state FAR *state;
-    unsigned copy, dist;
-
-    state = (struct inflate_state FAR *)strm->state;
-
-    /* if it hasn't been done already, allocate space for the window */
-    if (state->window == Z_NULL) {
-        state->window = (unsigned char FAR *)
-                        ZALLOC(strm, 1U << state->wbits,
-                               sizeof(unsigned char));
-        if (state->window == Z_NULL) return 1;
-    }
-
-    /* if window not in use yet, initialize */
-    if (state->wsize == 0) {
-        state->wsize = 1U << state->wbits;
-        state->write = 0;
-        state->whave = 0;
-    }
-
-    /* copy state->wsize or less output bytes into the circular window */
-    copy = out - strm->avail_out;
-    if (copy >= state->wsize) {
-        zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
-        state->write = 0;
-        state->whave = state->wsize;
-    }
-    else {
-        dist = state->wsize - state->write;
-        if (dist > copy) dist = copy;
-        zmemcpy(state->window + state->write, strm->next_out - copy, dist);
-        copy -= dist;
-        if (copy) {
-            zmemcpy(state->window, strm->next_out - copy, copy);
-            state->write = copy;
-            state->whave = state->wsize;
-        }
-        else {
-            state->write += dist;
-            if (state->write == state->wsize) state->write = 0;
-            if (state->whave < state->wsize) state->whave += dist;
-        }
-    }
-    return 0;
-}
-
-/* Macros for inflate(): */
-
-/* check function to use adler32() for zlib or crc32() for gzip */
-#ifdef GUNZIP
-#  define UPDATE(check, buf, len) \
-    (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
-#else
-#  define UPDATE(check, buf, len) adler32(check, buf, len)
-#endif
-
-/* check macros for header crc */
-#ifdef GUNZIP
-#  define CRC2(check, word) \
-    do { \
-        hbuf[0] = (unsigned char)(word); \
-        hbuf[1] = (unsigned char)((word) >> 8); \
-        check = crc32(check, hbuf, 2); \
-    } while (0)
-
-#  define CRC4(check, word) \
-    do { \
-        hbuf[0] = (unsigned char)(word); \
-        hbuf[1] = (unsigned char)((word) >> 8); \
-        hbuf[2] = (unsigned char)((word) >> 16); \
-        hbuf[3] = (unsigned char)((word) >> 24); \
-        check = crc32(check, hbuf, 4); \
-    } while (0)
-#endif
-
-/* Load registers with state in inflate() for speed */
-#define LOAD() \
-    do { \
-        put = strm->next_out; \
-        left = strm->avail_out; \
-        next = strm->next_in; \
-        have = strm->avail_in; \
-        hold = state->hold; \
-        bits = state->bits; \
-    } while (0)
-
-/* Restore state from registers in inflate() */
-#define RESTORE() \
-    do { \
-        strm->next_out = put; \
-        strm->avail_out = left; \
-        strm->next_in = next; \
-        strm->avail_in = have; \
-        state->hold = hold; \
-        state->bits = bits; \
-    } while (0)
-
-/* Clear the input bit accumulator */
-#define INITBITS() \
-    do { \
-        hold = 0; \
-        bits = 0; \
-    } while (0)
-
-/* Get a byte of input into the bit accumulator, or return from inflate()
-   if there is no input available. */
-#define PULLBYTE() \
-    do { \
-        if (have == 0) goto inf_leave; \
-        have--; \
-        hold += (unsigned long)(*next++) << bits; \
-        bits += 8; \
-    } while (0)
-
-/* Assure that there are at least n bits in the bit accumulator.  If there is
-   not enough available input to do that, then return from inflate(). */
-#define NEEDBITS(n) \
-    do { \
-        while (bits < (unsigned)(n)) \
-            PULLBYTE(); \
-    } while (0)
-
-/* Return the low n bits of the bit accumulator (n < 16) */
-#define BITS(n) \
-    ((unsigned)hold & ((1U << (n)) - 1))
-
-/* Remove n bits from the bit accumulator */
-#define DROPBITS(n) \
-    do { \
-        hold >>= (n); \
-        bits -= (unsigned)(n); \
-    } while (0)
-
-/* Remove zero to seven bits as needed to go to a byte boundary */
-#define BYTEBITS() \
-    do { \
-        hold >>= bits & 7; \
-        bits -= bits & 7; \
-    } while (0)
-
-/* Reverse the bytes in a 32-bit value */
-#define REVERSE(q) \
-    ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
-     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
-
-/*
-   inflate() uses a state machine to process as much input data and generate as
-   much output data as possible before returning.  The state machine is
-   structured roughly as follows:
-
-    for (;;) switch (state) {
-    ...
-    case STATEn:
-        if (not enough input data or output space to make progress)
-            return;
-        ... make progress ...
-        state = STATEm;
-        break;
-    ...
-    }
-
-   so when inflate() is called again, the same case is attempted again, and
-   if the appropriate resources are provided, the machine proceeds to the
-   next state.  The NEEDBITS() macro is usually the way the state evaluates
-   whether it can proceed or should return.  NEEDBITS() does the return if
-   the requested bits are not available.  The typical use of the BITS macros
-   is:
-
-        NEEDBITS(n);
-        ... do something with BITS(n) ...
-        DROPBITS(n);
-
-   where NEEDBITS(n) either returns from inflate() if there isn't enough
-   input left to load n bits into the accumulator, or it continues.  BITS(n)
-   gives the low n bits in the accumulator.  When done, DROPBITS(n) drops
-   the low n bits off the accumulator.  INITBITS() clears the accumulator
-   and sets the number of available bits to zero.  BYTEBITS() discards just
-   enough bits to put the accumulator on a byte boundary.  After BYTEBITS()
-   and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
-
-   NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
-   if there is no input available.  The decoding of variable length codes uses
-   PULLBYTE() directly in order to pull just enough bytes to decode the next
-   code, and no more.
-
-   Some states loop until they get enough input, making sure that enough
-   state information is maintained to continue the loop where it left off
-   if NEEDBITS() returns in the loop.  For example, want, need, and keep
-   would all have to actually be part of the saved state in case NEEDBITS()
-   returns:
-
-    case STATEw:
-        while (want < need) {
-            NEEDBITS(n);
-            keep[want++] = BITS(n);
-            DROPBITS(n);
-        }
-        state = STATEx;
-    case STATEx:
-
-   As shown above, if the next state is also the next case, then the break
-   is omitted.
-
-   A state may also return if there is not enough output space available to
-   complete that state.  Those states are copying stored data, writing a
-   literal byte, and copying a matching string.
-
-   When returning, a "goto inf_leave" is used to update the total counters,
-   update the check value, and determine whether any progress has been made
-   during that inflate() call in order to return the proper return code.
-   Progress is defined as a change in either strm->avail_in or strm->avail_out.
-   When there is a window, goto inf_leave will update the window with the last
-   output written.  If a goto inf_leave occurs in the middle of decompression
-   and there is no window currently, goto inf_leave will create one and copy
-   output to the window for the next call of inflate().
-
-   In this implementation, the flush parameter of inflate() only affects the
-   return code (per zlib.h).  inflate() always writes as much as possible to
-   strm->next_out, given the space available and the provided input--the effect
-   documented in zlib.h of Z_SYNC_FLUSH.  Furthermore, inflate() always defers
-   the allocation of and copying into a sliding window until necessary, which
-   provides the effect documented in zlib.h for Z_FINISH when the entire input
-   stream available.  So the only thing the flush parameter actually does is:
-   when flush is set to Z_FINISH, inflate() cannot return Z_OK.  Instead it
-   will return Z_BUF_ERROR if it has not reached the end of the stream.
- */
-
-int ZEXPORT inflate(strm, flush)
-z_streamp strm;
-int flush;
-{
-    struct inflate_state FAR *state;
-    unsigned char FAR *next;    /* next input */
-    unsigned char FAR *put;     /* next output */
-    unsigned have, left;        /* available input and output */
-    unsigned long hold;         /* bit buffer */
-    unsigned bits;              /* bits in bit buffer */
-    unsigned in, out;           /* save starting available input and output */
-    unsigned copy;              /* number of stored or match bytes to copy */
-    unsigned char FAR *from;    /* where to copy match bytes from */
-    code this;                  /* current decoding table entry */
-    code last;                  /* parent table entry */
-    unsigned len;               /* length to copy for repeats, bits to drop */
-    int ret;                    /* return code */
-#ifdef GUNZIP
-    unsigned char hbuf[4];      /* buffer for gzip header crc calculation */
-#endif
-    static const unsigned short order[19] = /* permutation of code lengths */
-        {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
-    if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
-        (strm->next_in == Z_NULL && strm->avail_in != 0))
-        return Z_STREAM_ERROR;
-
-    state = (struct inflate_state FAR *)strm->state;
-    if (state->mode == TYPE) state->mode = TYPEDO;      /* skip check */
-    LOAD();
-    in = have;
-    out = left;
-    ret = Z_OK;
-    for (;;)
-        switch (state->mode) {
-        case HEAD:
-            if (state->wrap == 0) {
-                state->mode = TYPEDO;
-                break;
-            }
-            NEEDBITS(16);
-#ifdef GUNZIP
-            if ((state->wrap & 2) && hold == 0x8b1f) {  /* gzip header */
-                state->check = crc32(0L, Z_NULL, 0);
-                CRC2(state->check, hold);
-                INITBITS();
-                state->mode = FLAGS;
-                break;
-            }
-            state->flags = 0;           /* expect zlib header */
-            if (!(state->wrap & 1) ||   /* check if zlib header allowed */
-#else
-            if (
-#endif
-                ((BITS(8) << 8) + (hold >> 8)) % 31) {
-                strm->msg = (char *)"incorrect header check";
-                state->mode = BAD;
-                break;
-            }
-            if (BITS(4) != Z_DEFLATED) {
-                strm->msg = (char *)"unknown compression method";
-                state->mode = BAD;
-                break;
-            }
-            DROPBITS(4);
-            if (BITS(4) + 8 > state->wbits) {
-                strm->msg = (char *)"invalid window size";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:   zlib header ok\n"));
-            strm->adler = state->check = adler32(0L, Z_NULL, 0);
-            state->mode = hold & 0x200 ? DICTID : TYPE;
-            INITBITS();
-            break;
-#ifdef GUNZIP
-        case FLAGS:
-            NEEDBITS(16);
-            state->flags = (int)(hold);
-            if ((state->flags & 0xff) != Z_DEFLATED) {
-                strm->msg = (char *)"unknown compression method";
-                state->mode = BAD;
-                break;
-            }
-            if (state->flags & 0xe000) {
-                strm->msg = (char *)"unknown header flags set";
-                state->mode = BAD;
-                break;
-            }
-            if (state->flags & 0x0200) CRC2(state->check, hold);
-            INITBITS();
-            state->mode = TIME;
-        case TIME:
-            NEEDBITS(32);
-            if (state->flags & 0x0200) CRC4(state->check, hold);
-            INITBITS();
-            state->mode = OS;
-        case OS:
-            NEEDBITS(16);
-            if (state->flags & 0x0200) CRC2(state->check, hold);
-            INITBITS();
-            state->mode = EXLEN;
-        case EXLEN:
-            if (state->flags & 0x0400) {
-                NEEDBITS(16);
-                state->length = (unsigned)(hold);
-                if (state->flags & 0x0200) CRC2(state->check, hold);
-                INITBITS();
-            }
-            state->mode = EXTRA;
-        case EXTRA:
-            if (state->flags & 0x0400) {
-                copy = state->length;
-                if (copy > have) copy = have;
-                if (copy) {
-                    if (state->flags & 0x0200)
-                        state->check = crc32(state->check, next, copy);
-                    have -= copy;
-                    next += copy;
-                    state->length -= copy;
-                }
-                if (state->length) goto inf_leave;
-            }
-            state->mode = NAME;
-        case NAME:
-            if (state->flags & 0x0800) {
-                if (have == 0) goto inf_leave;
-                copy = 0;
-                do {
-                    len = (unsigned)(next[copy++]);
-                } while (len && copy < have);
-                if (state->flags & 0x02000)
-                    state->check = crc32(state->check, next, copy);
-                have -= copy;
-                next += copy;
-                if (len) goto inf_leave;
-            }
-            state->mode = COMMENT;
-        case COMMENT:
-            if (state->flags & 0x1000) {
-                if (have == 0) goto inf_leave;
-                copy = 0;
-                do {
-                    len = (unsigned)(next[copy++]);
-                } while (len && copy < have);
-                if (state->flags & 0x02000)
-                    state->check = crc32(state->check, next, copy);
-                have -= copy;
-                next += copy;
-                if (len) goto inf_leave;
-            }
-            state->mode = HCRC;
-        case HCRC:
-            if (state->flags & 0x0200) {
-                NEEDBITS(16);
-                if (hold != (state->check & 0xffff)) {
-                    strm->msg = (char *)"header crc mismatch";
-                    state->mode = BAD;
-                    break;
-                }
-                INITBITS();
-            }
-            strm->adler = state->check = crc32(0L, Z_NULL, 0);
-            state->mode = TYPE;
-            break;
-#endif
-        case DICTID:
-            NEEDBITS(32);
-            strm->adler = state->check = REVERSE(hold);
-            INITBITS();
-            state->mode = DICT;
-        case DICT:
-            if (state->havedict == 0) {
-                RESTORE();
-                return Z_NEED_DICT;
-            }
-            strm->adler = state->check = adler32(0L, Z_NULL, 0);
-            state->mode = TYPE;
-        case TYPE:
-            if (flush == Z_BLOCK) goto inf_leave;
-        case TYPEDO:
-            if (state->last) {
-                BYTEBITS();
-                state->mode = CHECK;
-                break;
-            }
-            NEEDBITS(3);
-            state->last = BITS(1);
-            DROPBITS(1);
-            switch (BITS(2)) {
-            case 0:                             /* stored block */
-                Tracev((stderr, "inflate:     stored block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = STORED;
-                break;
-            case 1:                             /* fixed block */
-                fixedtables(state);
-                Tracev((stderr, "inflate:     fixed codes block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = LEN;              /* decode codes */
-                break;
-            case 2:                             /* dynamic block */
-                Tracev((stderr, "inflate:     dynamic codes block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = TABLE;
-                break;
-            case 3:
-                strm->msg = (char *)"invalid block type";
-                state->mode = BAD;
-            }
-            DROPBITS(2);
-            break;
-        case STORED:
-            BYTEBITS();                         /* go to byte boundary */
-            NEEDBITS(32);
-            if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
-                strm->msg = (char *)"invalid stored block lengths";
-                state->mode = BAD;
-                break;
-            }
-            state->length = (unsigned)hold & 0xffff;
-            Tracev((stderr, "inflate:       stored length %u\n",
-                    state->length));
-            INITBITS();
-            state->mode = COPY;
-        case COPY:
-            copy = state->length;
-            if (copy) {
-                if (copy > have) copy = have;
-                if (copy > left) copy = left;
-                if (copy == 0) goto inf_leave;
-                zmemcpy(put, next, copy);
-                have -= copy;
-                next += copy;
-                left -= copy;
-                put += copy;
-                state->length -= copy;
-                break;
-            }
-            Tracev((stderr, "inflate:       stored end\n"));
-            state->mode = TYPE;
-            break;
-        case TABLE:
-            NEEDBITS(14);
-            state->nlen = BITS(5) + 257;
-            DROPBITS(5);
-            state->ndist = BITS(5) + 1;
-            DROPBITS(5);
-            state->ncode = BITS(4) + 4;
-            DROPBITS(4);
-#ifndef PKZIP_BUG_WORKAROUND
-            if (state->nlen > 286 || state->ndist > 30) {
-                strm->msg = (char *)"too many length or distance symbols";
-                state->mode = BAD;
-                break;
-            }
-#endif
-            Tracev((stderr, "inflate:       table sizes ok\n"));
-            state->have = 0;
-            state->mode = LENLENS;
-        case LENLENS:
-            while (state->have < state->ncode) {
-                NEEDBITS(3);
-                state->lens[order[state->have++]] = (unsigned short)BITS(3);
-                DROPBITS(3);
-            }
-            while (state->have < 19)
-                state->lens[order[state->have++]] = 0;
-            state->next = state->codes;
-            state->lencode = (code const FAR *)(state->next);
-            state->lenbits = 7;
-            ret = inflate_table(CODES, state->lens, 19, &(state->next),
-                                &(state->lenbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid code lengths set";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:       code lengths ok\n"));
-            state->have = 0;
-            state->mode = CODELENS;
-        case CODELENS:
-            while (state->have < state->nlen + state->ndist) {
-                for (;;) {
-                    this = state->lencode[BITS(state->lenbits)];
-                    if ((unsigned)(this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                if (this.val < 16) {
-                    NEEDBITS(this.bits);
-                    DROPBITS(this.bits);
-                    state->lens[state->have++] = this.val;
-                }
-                else {
-                    if (this.val == 16) {
-                        NEEDBITS(this.bits + 2);
-                        DROPBITS(this.bits);
-                        if (state->have == 0) {
-                            strm->msg = (char *)"invalid bit length repeat";
-                            state->mode = BAD;
-                            break;
-                        }
-                        len = state->lens[state->have - 1];
-                        copy = 3 + BITS(2);
-                        DROPBITS(2);
-                    }
-                    else if (this.val == 17) {
-                        NEEDBITS(this.bits + 3);
-                        DROPBITS(this.bits);
-                        len = 0;
-                        copy = 3 + BITS(3);
-                        DROPBITS(3);
-                    }
-                    else {
-                        NEEDBITS(this.bits + 7);
-                        DROPBITS(this.bits);
-                        len = 0;
-                        copy = 11 + BITS(7);
-                        DROPBITS(7);
-                    }
-                    if (state->have + copy > state->nlen + state->ndist) {
-                        strm->msg = (char *)"invalid bit length repeat";
-                        state->mode = BAD;
-                        break;
-                    }
-                    while (copy--)
-                        state->lens[state->have++] = (unsigned short)len;
-                }
-            }
-
-            /* handle error breaks in while */
-            if (state->mode == BAD) break;
-
-            /* build code tables */
-            state->next = state->codes;
-            state->lencode = (code const FAR *)(state->next);
-            state->lenbits = 9;
-            ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
-                                &(state->lenbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid literal/lengths set";
-                state->mode = BAD;
-                break;
-            }
-            state->distcode = (code const FAR *)(state->next);
-            state->distbits = 6;
-            ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
-                            &(state->next), &(state->distbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid distances set";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:       codes ok\n"));
-            state->mode = LEN;
-        case LEN:
-            if (have >= 6 && left >= 258) {
-                RESTORE();
-                inflate_fast(strm, out);
-                LOAD();
-                break;
-            }
-            for (;;) {
-                this = state->lencode[BITS(state->lenbits)];
-                if ((unsigned)(this.bits) <= bits) break;
-                PULLBYTE();
-            }
-            if (this.op && (this.op & 0xf0) == 0) {
-                last = this;
-                for (;;) {
-                    this = state->lencode[last.val +
-                            (BITS(last.bits + last.op) >> last.bits)];
-                    if ((unsigned)(last.bits + this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                DROPBITS(last.bits);
-            }
-            DROPBITS(this.bits);
-            state->length = (unsigned)this.val;
-            if ((int)(this.op) == 0) {
-                Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
-                        "inflate:         literal '%c'\n" :
-                        "inflate:         literal 0x%02x\n", this.val));
-                state->mode = LIT;
-                break;
-            }
-            if (this.op & 32) {
-                Tracevv((stderr, "inflate:         end of block\n"));
-                state->mode = TYPE;
-                break;
-            }
-            if (this.op & 64) {
-                strm->msg = (char *)"invalid literal/length code";
-                state->mode = BAD;
-                break;
-            }
-            state->extra = (unsigned)(this.op) & 15;
-            state->mode = LENEXT;
-        case LENEXT:
-            if (state->extra) {
-                NEEDBITS(state->extra);
-                state->length += BITS(state->extra);
-                DROPBITS(state->extra);
-            }
-            Tracevv((stderr, "inflate:         length %u\n", state->length));
-            state->mode = DIST;
-        case DIST:
-            for (;;) {
-                this = state->distcode[BITS(state->distbits)];
-                if ((unsigned)(this.bits) <= bits) break;
-                PULLBYTE();
-            }
-            if ((this.op & 0xf0) == 0) {
-                last = this;
-                for (;;) {
-                    this = state->distcode[last.val +
-                            (BITS(last.bits + last.op) >> last.bits)];
-                    if ((unsigned)(last.bits + this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                DROPBITS(last.bits);
-            }
-            DROPBITS(this.bits);
-            if (this.op & 64) {
-                strm->msg = (char *)"invalid distance code";
-                state->mode = BAD;
-                break;
-            }
-            state->offset = (unsigned)this.val;
-            state->extra = (unsigned)(this.op) & 15;
-            state->mode = DISTEXT;
-        case DISTEXT:
-            if (state->extra) {
-                NEEDBITS(state->extra);
-                state->offset += BITS(state->extra);
-                DROPBITS(state->extra);
-            }
-            if (state->offset > state->whave + out - left) {
-                strm->msg = (char *)"invalid distance too far back";
-                state->mode = BAD;
-                break;
-            }
-            Tracevv((stderr, "inflate:         distance %u\n", state->offset));
-            state->mode = MATCH;
-        case MATCH:
-            if (left == 0) goto inf_leave;
-            copy = out - left;
-            if (state->offset > copy) {         /* copy from window */
-                copy = state->offset - copy;
-                if (copy > state->write) {
-                    copy -= state->write;
-                    from = state->window + (state->wsize - copy);
-                }
-                else
-                    from = state->window + (state->write - copy);
-                if (copy > state->length) copy = state->length;
-            }
-            else {                              /* copy from output */
-                from = put - state->offset;
-                copy = state->length;
-            }
-            if (copy > left) copy = left;
-            left -= copy;
-            state->length -= copy;
-            do {
-                *put++ = *from++;
-            } while (--copy);
-            if (state->length == 0) state->mode = LEN;
-            break;
-        case LIT:
-            if (left == 0) goto inf_leave;
-            *put++ = (unsigned char)(state->length);
-            left--;
-            state->mode = LEN;
-            break;
-        case CHECK:
-            if (state->wrap) {
-                NEEDBITS(32);
-                out -= left;
-                strm->total_out += out;
-                state->total += out;
-                if (out)
-                    strm->adler = state->check =
-                        UPDATE(state->check, put - out, out);
-                out = left;
-                if ((
-#ifdef GUNZIP
-                     state->flags ? hold :
-#endif
-                     REVERSE(hold)) != state->check) {
-                    strm->msg = (char *)"incorrect data check";
-                    state->mode = BAD;
-                    break;
-                }
-                INITBITS();
-                Tracev((stderr, "inflate:   check matches trailer\n"));
-            }
-#ifdef GUNZIP
-            state->mode = LENGTH;
-        case LENGTH:
-            if (state->wrap && state->flags) {
-                NEEDBITS(32);
-                if (hold != (state->total & 0xffffffffUL)) {
-                    strm->msg = (char *)"incorrect length check";
-                    state->mode = BAD;
-                    break;
-                }
-                INITBITS();
-                Tracev((stderr, "inflate:   length matches trailer\n"));
-            }
-#endif
-            state->mode = DONE;
-        case DONE:
-            ret = Z_STREAM_END;
-            goto inf_leave;
-        case BAD:
-            ret = Z_DATA_ERROR;
-            goto inf_leave;
-        case MEM:
-            return Z_MEM_ERROR;
-        case SYNC:
-        default:
-            return Z_STREAM_ERROR;
-        }
-
-    /*
-       Return from inflate(), updating the total counts and the check value.
-       If there was no progress during the inflate() call, return a buffer
-       error.  Call updatewindow() to create and/or update the window state.
-       Note: a memory error from inflate() is non-recoverable.
-     */
-  inf_leave:
-    RESTORE();
-    if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
-        if (updatewindow(strm, out)) {
-            state->mode = MEM;
-            return Z_MEM_ERROR;
-        }
-    in -= strm->avail_in;
-    out -= strm->avail_out;
-    strm->total_in += in;
-    strm->total_out += out;
-    state->total += out;
-    if (state->wrap && out)
-        strm->adler = state->check =
-            UPDATE(state->check, strm->next_out - out, out);
-    strm->data_type = state->bits + (state->last ? 64 : 0) +
-                      (state->mode == TYPE ? 128 : 0);
-    if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
-        ret = Z_BUF_ERROR;
-    return ret;
-}
-
-int ZEXPORT inflateEnd(strm)
-z_streamp strm;
-{
-    struct inflate_state FAR *state;
-    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
-        return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    if (state->window != Z_NULL) ZFREE(strm, state->window);
-    ZFREE(strm, strm->state);
-    strm->state = Z_NULL;
-    Tracev((stderr, "inflate: end\n"));
-    return Z_OK;
-}
-
-int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
-z_streamp strm;
-const Bytef *dictionary;
-uInt dictLength;
-{
-    struct inflate_state FAR *state;
-    unsigned long id;
-
-    /* check state */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    if (state->mode != DICT) return Z_STREAM_ERROR;
-
-    /* check for correct dictionary id */
-    id = adler32(0L, Z_NULL, 0);
-    id = adler32(id, dictionary, dictLength);
-    if (id != state->check) return Z_DATA_ERROR;
-
-    /* copy dictionary to window */
-    if (updatewindow(strm, strm->avail_out)) {
-        state->mode = MEM;
-        return Z_MEM_ERROR;
-    }
-    if (dictLength > state->wsize) {
-        zmemcpy(state->window, dictionary + dictLength - state->wsize,
-                state->wsize);
-        state->whave = state->wsize;
-    }
-    else {
-        zmemcpy(state->window + state->wsize - dictLength, dictionary,
-                dictLength);
-        state->whave = dictLength;
-    }
-    state->havedict = 1;
-    Tracev((stderr, "inflate:   dictionary set\n"));
-    return Z_OK;
-}
-
-/*
-   Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff.  Return when found
-   or when out of input.  When called, *have is the number of pattern bytes
-   found in order so far, in 0..3.  On return *have is updated to the new
-   state.  If on return *have equals four, then the pattern was found and the
-   return value is how many bytes were read including the last byte of the
-   pattern.  If *have is less than four, then the pattern has not been found
-   yet and the return value is len.  In the latter case, syncsearch() can be
-   called again with more data and the *have state.  *have is initialized to
-   zero for the first call.
- */
-local unsigned syncsearch(have, buf, len)
-unsigned FAR *have;
-unsigned char FAR *buf;
-unsigned len;
-{
-    unsigned got;
-    unsigned next;
-
-    got = *have;
-    next = 0;
-    while (next < len && got < 4) {
-        if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
-            got++;
-        else if (buf[next])
-            got = 0;
-        else
-            got = 4 - got;
-        next++;
-    }
-    *have = got;
-    return next;
-}
-
-int ZEXPORT inflateSync(strm)
-z_streamp strm;
-{
-    unsigned len;               /* number of bytes to look at or looked at */
-    unsigned long in, out;      /* temporary to save total_in and total_out */
-    unsigned char buf[4];       /* to restore bit buffer to byte string */
-    struct inflate_state FAR *state;
-
-    /* check parameters */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
-
-    /* if first time, start search in bit buffer */
-    if (state->mode != SYNC) {
-        state->mode = SYNC;
-        state->hold <<= state->bits & 7;
-        state->bits -= state->bits & 7;
-        len = 0;
-        while (state->bits >= 8) {
-            buf[len++] = (unsigned char)(state->hold);
-            state->hold >>= 8;
-            state->bits -= 8;
-        }
-        state->have = 0;
-        syncsearch(&(state->have), buf, len);
-    }
-
-    /* search available input */
-    len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
-    strm->avail_in -= len;
-    strm->next_in += len;
-    strm->total_in += len;
-
-    /* return no joy or set up to restart inflate() on a new block */
-    if (state->have != 4) return Z_DATA_ERROR;
-    in = strm->total_in;  out = strm->total_out;
-    inflateReset(strm);
-    strm->total_in = in;  strm->total_out = out;
-    state->mode = TYPE;
-    return Z_OK;
-}
-
-/*
-   Returns true if inflate is currently at the end of a block generated by
-   Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
-   implementation to provide an additional safety check. PPP uses
-   Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
-   block. When decompressing, PPP checks that at the end of input packet,
-   inflate is waiting for these length bytes.
- */
-int ZEXPORT inflateSyncPoint(strm)
-z_streamp strm;
-{
-    struct inflate_state FAR *state;
-
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    return state->mode == STORED && state->bits == 0;
-}
-
-int ZEXPORT inflateCopy(dest, source)
-z_streamp dest;
-z_streamp source;
-{
-    struct inflate_state FAR *state;
-    struct inflate_state FAR *copy;
-    unsigned char FAR *window;
-
-    /* check input */
-    if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
-        source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
-        return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)source->state;
-
-    /* allocate space */
-    copy = (struct inflate_state FAR *)
-           ZALLOC(source, 1, sizeof(struct inflate_state));
-    if (copy == Z_NULL) return Z_MEM_ERROR;
-    window = Z_NULL;
-    if (state->window != Z_NULL) {
-        window = (unsigned char FAR *)
-                 ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
-        if (window == Z_NULL) {
-            ZFREE(source, copy);
-            return Z_MEM_ERROR;
-        }
-    }
-
-    /* copy state */
-    *dest = *source;
-    *copy = *state;
-    copy->lencode = copy->codes + (state->lencode - state->codes);
-    copy->distcode = copy->codes + (state->distcode - state->codes);
-    copy->next = copy->codes + (state->next - state->codes);
-    if (window != Z_NULL)
-        zmemcpy(window, state->window, 1U << state->wbits);
-    copy->window = window;
-    dest->state = (voidpf)copy;
-    return Z_OK;
-}

sys/src/cmd/gs/zlib/inflate.h

@@ -1,126 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
-   part of the implementation of the compression library and is
-   subject to change. Applications should only use zlib.h.
- */
-
-/* define NO_GZIP when compiling if you want to disable gzip header and
-   trailer decoding by inflate().  NO_GZIP would be used to avoid linking in
-   the crc code when it is not needed.  For shared libraries, gzip decoding
-   should be left enabled. */
-#ifndef NO_GZIP
-#  define GUNZIP
-#endif
-
-/* Possible inflate modes between inflate() calls */
-typedef enum {
-    HEAD,       /* i: waiting for magic header */
-#ifdef GUNZIP
-    FLAGS,      /* i: waiting for method and flags (gzip) */
-    TIME,       /* i: waiting for modification time (gzip) */
-    OS,         /* i: waiting for extra flags and operating system (gzip) */
-    EXLEN,      /* i: waiting for extra length (gzip) */
-    EXTRA,      /* i: waiting for extra bytes (gzip) */
-    NAME,       /* i: waiting for end of file name (gzip) */
-    COMMENT,    /* i: waiting for end of comment (gzip) */
-    HCRC,       /* i: waiting for header crc (gzip) */
-#endif
-    DICTID,     /* i: waiting for dictionary check value */
-    DICT,       /* waiting for inflateSetDictionary() call */
-        TYPE,       /* i: waiting for type bits, including last-flag bit */
-        TYPEDO,     /* i: same, but skip check to exit inflate on new block */
-        STORED,     /* i: waiting for stored size (length and complement) */
-        COPY,       /* i/o: waiting for input or output to copy stored block */
-        TABLE,      /* i: waiting for dynamic block table lengths */
-        LENLENS,    /* i: waiting for code length code lengths */
-        CODELENS,   /* i: waiting for length/lit and distance code lengths */
-            LEN,        /* i: waiting for length/lit code */
-            LENEXT,     /* i: waiting for length extra bits */
-            DIST,       /* i: waiting for distance code */
-            DISTEXT,    /* i: waiting for distance extra bits */
-            MATCH,      /* o: waiting for output space to copy string */
-            LIT,        /* o: waiting for output space to write literal */
-    CHECK,      /* i: waiting for 32-bit check value */
-#ifdef GUNZIP
-    LENGTH,     /* i: waiting for 32-bit length (gzip) */
-#endif
-    DONE,       /* finished check, done -- remain here until reset */
-    BAD,        /* got a data error -- remain here until reset */
-    MEM,        /* got an inflate() memory error -- remain here until reset */
-    SYNC        /* looking for synchronization bytes to restart inflate() */
-} inflate_mode;
-
-/*
-    State transitions between above modes -
-
-    (most modes can go to the BAD or MEM mode -- not shown for clarity)
-
-    Process header:
-        HEAD -> (gzip) or (zlib)
-        (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
-        NAME -> COMMENT -> HCRC -> TYPE
-        (zlib) -> DICTID or TYPE
-        DICTID -> DICT -> TYPE
-    Read deflate blocks:
-            TYPE -> STORED or TABLE or LEN or CHECK
-            STORED -> COPY -> TYPE
-            TABLE -> LENLENS -> CODELENS -> LEN
-    Read deflate codes:
-                LEN -> LENEXT or LIT or TYPE
-                LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
-                LIT -> LEN
-    Process trailer:
-        CHECK -> LENGTH -> DONE
- */
-
-/* state maintained between inflate() calls.  Approximately 7K bytes. */
-struct inflate_state {
-    inflate_mode mode;          /* current inflate mode */
-    int last;                   /* true if processing last block */
-    int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip */
-    int havedict;               /* true if dictionary provided */
-    int flags;                  /* gzip header method and flags (0 if zlib) */
-    unsigned long check;        /* protected copy of check value */
-    unsigned long total;        /* protected copy of output count */
-        /* sliding window */
-    unsigned wbits;             /* log base 2 of requested window size */
-    unsigned wsize;             /* window size or zero if not using window */
-    unsigned whave;             /* valid bytes in the window */
-    unsigned write;             /* window write index */
-    unsigned char FAR *window;  /* allocated sliding window, if needed */
-        /* bit accumulator */
-    unsigned long hold;         /* input bit accumulator */
-    unsigned bits;              /* number of bits in "in" */
-        /* for string and stored block copying */
-    unsigned length;            /* literal or length of data to copy */
-    unsigned offset;            /* distance back to copy string from */
-        /* for table and code decoding */
-    unsigned extra;             /* extra bits needed */
-        /* fixed and dynamic code tables */
-    code const FAR *lencode;    /* starting table for length/literal codes */
-    code const FAR *distcode;   /* starting table for distance codes */
-    unsigned lenbits;           /* index bits for lencode */
-    unsigned distbits;          /* index bits for distcode */
-        /* dynamic table building */
-    unsigned ncode;             /* number of code length code lengths */
-    unsigned nlen;              /* number of length code lengths */
-    unsigned ndist;             /* number of distance code lengths */
-    unsigned have;              /* number of code lengths in lens[] */
-    code FAR *next;             /* next available space in codes[] */
-    unsigned short lens[320];   /* temporary storage for code lengths */
-    unsigned short work[288];   /* work area for code table building */
-    code codes[ENOUGH];         /* space for code tables */
-};

sys/src/cmd/gs/zlib/inftrees.c

@@ -1,337 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2004 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-
-#define MAXBITS 15
-
-const char inflate_copyright[] =
-   " inflate 1.2.2 Copyright 1995-2004 Mark Adler ";
-/*
-  If you use the zlib library in a product, an acknowledgment is welcome
-  in the documentation of your product. If for some reason you cannot
-  include such an acknowledgment, I would appreciate that you keep this
-  copyright string in the executable of your product.
- */
-
-/*
-   Build a set of tables to decode the provided canonical Huffman code.
-   The code lengths are lens[0..codes-1].  The result starts at *table,
-   whose indices are 0..2^bits-1.  work is a writable array of at least
-   lens shorts, which is used as a work area.  type is the type of code
-   to be generated, CODES, LENS, or DISTS.  On return, zero is success,
-   -1 is an invalid code, and +1 means that ENOUGH isn't enough.  table
-   on return points to the next available entry's address.  bits is the
-   requested root table index bits, and on return it is the actual root
-   table index bits.  It will differ if the request is greater than the
-   longest code or if it is less than the shortest code.
- */
-int inflate_table(type, lens, codes, table, bits, work)
-codetype type;
-unsigned short FAR *lens;
-unsigned codes;
-code FAR * FAR *table;
-unsigned FAR *bits;
-unsigned short FAR *work;
-{
-    unsigned len;               /* a code's length in bits */
-    unsigned sym;               /* index of code symbols */
-    unsigned min, max;          /* minimum and maximum code lengths */
-    unsigned root;              /* number of index bits for root table */
-    unsigned curr;              /* number of index bits for current table */
-    unsigned drop;              /* code bits to drop for sub-table */
-    int left;                   /* number of prefix codes available */
-    unsigned used;              /* code entries in table used */
-    unsigned huff;              /* Huffman code */
-    unsigned incr;              /* for incrementing code, index */
-    unsigned fill;              /* index for replicating entries */
-    unsigned low;               /* low bits for current root entry */
-    unsigned mask;              /* mask for low root bits */
-    code this;                  /* table entry for duplication */
-    code FAR *next;             /* next available space in table */
-    const unsigned short FAR *base;     /* base value table to use */
-    const unsigned short FAR *extra;    /* extra bits table to use */
-    int end;                    /* use base and extra for symbol > end */
-    unsigned short count[MAXBITS+1];    /* number of codes of each length */
-    unsigned short offs[MAXBITS+1];     /* offsets in table for each length */
-    static const unsigned short lbase[31] = { /* Length codes 257..285 base */
-        3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
-        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
-    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
-        16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 198};
-    static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
-        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
-        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
-        8193, 12289, 16385, 24577, 0, 0};
-    static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
-        16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
-        23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
-        28, 28, 29, 29, 64, 64};
-
-    /*
-       Process a set of code lengths to create a canonical Huffman code.  The
-       code lengths are lens[0..codes-1].  Each length corresponds to the
-       symbols 0..codes-1.  The Huffman code is generated by first sorting the
-       symbols by length from short to long, and retaining the symbol order
-       for codes with equal lengths.  Then the code starts with all zero bits
-       for the first code of the shortest length, and the codes are integer
-       increments for the same length, and zeros are appended as the length
-       increases.  For the deflate format, these bits are stored backwards
-       from their more natural integer increment ordering, and so when the
-       decoding tables are built in the large loop below, the integer codes
-       are incremented backwards.
-
-       This routine assumes, but does not check, that all of the entries in
-       lens[] are in the range 0..MAXBITS.  The caller must assure this.
-       1..MAXBITS is interpreted as that code length.  zero means that that
-       symbol does not occur in this code.
-
-       The codes are sorted by computing a count of codes for each length,
-       creating from that a table of starting indices for each length in the
-       sorted table, and then entering the symbols in order in the sorted
-       table.  The sorted table is work[], with that space being provided by
-       the caller.
-
-       The length counts are used for other purposes as well, i.e. finding
-       the minimum and maximum length codes, determining if there are any
-       codes at all, checking for a valid set of lengths, and looking ahead
-       at length counts to determine sub-table sizes when building the
-       decoding tables.
-     */
-
-    /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
-    for (len = 0; len <= MAXBITS; len++)
-        count[len] = 0;
-    for (sym = 0; sym < codes; sym++)
-        count[lens[sym]]++;
-
-    /* bound code lengths, force root to be within code lengths */
-    root = *bits;
-    for (max = MAXBITS; max >= 1; max--)
-        if (count[max] != 0) break;
-    if (root > max) root = max;
-    if (max == 0) {                     /* no symbols to code at all */
-        this.op = (unsigned char)64;    /* invalid code marker */
-        this.bits = (unsigned char)1;
-        this.val = (unsigned short)0;
-        *(*table)++ = this;             /* make a table to force an error */
-        *(*table)++ = this;
-        *bits = 1;
-        return 0;     /* no symbols, but wait for decoding to report error */
-    }
-    for (min = 1; min <= MAXBITS; min++)
-        if (count[min] != 0) break;
-    if (root < min) root = min;
-
-    /* check for an over-subscribed or incomplete set of lengths */
-    left = 1;
-    for (len = 1; len <= MAXBITS; len++) {
-        left <<= 1;
-        left -= count[len];
-        if (left < 0) return -1;        /* over-subscribed */
-    }
-    if (left > 0 && (type == CODES || (codes - count[0] != 1)))
-        return -1;                      /* incomplete set */
-
-    /* generate offsets into symbol table for each length for sorting */
-    offs[1] = 0;
-    for (len = 1; len < MAXBITS; len++)
-        offs[len + 1] = offs[len] + count[len];
-
-    /* sort symbols by length, by symbol order within each length */
-    for (sym = 0; sym < codes; sym++)
-        if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
-
-    /*
-       Create and fill in decoding tables.  In this loop, the table being
-       filled is at next and has curr index bits.  The code being used is huff
-       with length len.  That code is converted to an index by dropping drop
-       bits off of the bottom.  For codes where len is less than drop + curr,
-       those top drop + curr - len bits are incremented through all values to
-       fill the table with replicated entries.
-
-       root is the number of index bits for the root table.  When len exceeds
-       root, sub-tables are created pointed to by the root entry with an index
-       of the low root bits of huff.  This is saved in low to check for when a
-       new sub-table should be started.  drop is zero when the root table is
-       being filled, and drop is root when sub-tables are being filled.
-
-       When a new sub-table is needed, it is necessary to look ahead in the
-       code lengths to determine what size sub-table is needed.  The length
-       counts are used for this, and so count[] is decremented as codes are
-       entered in the tables.
-
-       used keeps track of how many table entries have been allocated from the
-       provided *table space.  It is checked when a LENS table is being made
-       against the space in *table, ENOUGH, minus the maximum space needed by
-       the worst case distance code, MAXD.  This should never happen, but the
-       sufficiency of ENOUGH has not been proven exhaustively, hence the check.
-       This assumes that when type == LENS, bits == 9.
-
-       sym increments through all symbols, and the loop terminates when
-       all codes of length max, i.e. all codes, have been processed.  This
-       routine permits incomplete codes, so another loop after this one fills
-       in the rest of the decoding tables with invalid code markers.
-     */
-
-    /* set up for code type */
-    switch (type) {
-    case CODES:
-        base = extra = work;    /* dummy value--not used */
-        end = 19;
-        break;
-    case LENS:
-        base = lbase;
-        base -= 257;
-        extra = lext;
-        extra -= 257;
-        end = 256;
-        break;
-    default:            /* DISTS */
-        base = dbase;
-        extra = dext;
-        end = -1;
-    }
-
-    /* initialize state for loop */
-    huff = 0;                   /* starting code */
-    sym = 0;                    /* starting code symbol */
-    len = min;                  /* starting code length */
-    next = *table;              /* current table to fill in */
-    curr = root;                /* current table index bits */
-    drop = 0;                   /* current bits to drop from code for index */
-    low = (unsigned)(-1);       /* trigger new sub-table when len > root */
-    used = 1U << root;          /* use root table entries */
-    mask = used - 1;            /* mask for comparing low */
-
-    /* check available table space */
-    if (type == LENS && used >= ENOUGH - MAXD)
-        return 1;
-
-    /* process all codes and make table entries */
-    for (;;) {
-        /* create table entry */
-        this.bits = (unsigned char)(len - drop);
-        if ((int)(work[sym]) < end) {
-            this.op = (unsigned char)0;
-            this.val = work[sym];
-        }
-        else if ((int)(work[sym]) > end) {
-            this.op = (unsigned char)(extra[work[sym]]);
-            this.val = base[work[sym]];
-        }
-        else {
-            this.op = (unsigned char)(32 + 64);         /* end of block */
-            this.val = 0;
-        }
-
-        /* replicate for those indices with low len bits equal to huff */
-        incr = 1U << (len - drop);
-        fill = 1U << curr;
-        do {
-            fill -= incr;
-            next[(huff >> drop) + fill] = this;
-        } while (fill != 0);
-
-        /* backwards increment the len-bit code huff */
-        incr = 1U << (len - 1);
-        while (huff & incr)
-            incr >>= 1;
-        if (incr != 0) {
-            huff &= incr - 1;
-            huff += incr;
-        }
-        else
-            huff = 0;
-
-        /* go to next symbol, update count, len */
-        sym++;
-        if (--(count[len]) == 0) {
-            if (len == max) break;
-            len = lens[work[sym]];
-        }
-
-        /* create new sub-table if needed */
-        if (len > root && (huff & mask) != low) {
-            /* if first time, transition to sub-tables */
-            if (drop == 0)
-                drop = root;
-
-            /* increment past last table */
-            next += 1U << curr;
-
-            /* determine length of next table */
-            curr = len - drop;
-            left = (int)(1 << curr);
-            while (curr + drop < max) {
-                left -= count[curr + drop];
-                if (left <= 0) break;
-                curr++;
-                left <<= 1;
-            }
-
-            /* check for enough space */
-            used += 1U << curr;
-            if (type == LENS && used >= ENOUGH - MAXD)
-                return 1;
-
-            /* point entry in root table to sub-table */
-            low = huff & mask;
-            (*table)[low].op = (unsigned char)curr;
-            (*table)[low].bits = (unsigned char)root;
-            (*table)[low].val = (unsigned short)(next - *table);
-        }
-    }
-
-    /*
-       Fill in rest of table for incomplete codes.  This loop is similar to the
-       loop above in incrementing huff for table indices.  It is assumed that
-       len is equal to curr + drop, so there is no loop needed to increment
-       through high index bits.  When the current sub-table is filled, the loop
-       drops back to the root table to fill in any remaining entries there.
-     */
-    this.op = (unsigned char)64;                /* invalid code marker */
-    this.bits = (unsigned char)(len - drop);
-    this.val = (unsigned short)0;
-    while (huff != 0) {
-        /* when done with sub-table, drop back to root table */
-        if (drop != 0 && (huff & mask) != low) {
-            drop = 0;
-            len = root;
-            next = *table;
-            this.bits = (unsigned char)len;
-        }
-
-        /* put invalid code marker in table */
-        next[huff >> drop] = this;
-
-        /* backwards increment the len-bit code huff */
-        incr = 1U << (len - 1);
-        while (huff & incr)
-            incr >>= 1;
-        if (incr != 0) {
-            huff &= incr - 1;
-            huff += incr;
-        }
-        else
-            huff = 0;
-    }
-
-    /* set return parameters */
-    *table += used;
-    *bits = root;
-    return 0;
-}

sys/src/cmd/gs/zlib/inftrees.h

@@ -1,64 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* inftrees.h -- header to use inftrees.c
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
-   part of the implementation of the compression library and is
-   subject to change. Applications should only use zlib.h.
- */
-
-/* Structure for decoding tables.  Each entry provides either the
-   information needed to do the operation requested by the code that
-   indexed that table entry, or it provides a pointer to another
-   table that indexes more bits of the code.  op indicates whether
-   the entry is a pointer to another table, a literal, a length or
-   distance, an end-of-block, or an invalid code.  For a table
-   pointer, the low four bits of op is the number of index bits of
-   that table.  For a length or distance, the low four bits of op
-   is the number of extra bits to get after the code.  bits is
-   the number of bits in this code or part of the code to drop off
-   of the bit buffer.  val is the actual byte to output in the case
-   of a literal, the base length or distance, or the offset from
-   the current table to the next table.  Each entry is four bytes. */
-typedef struct {
-    unsigned char op;           /* operation, extra bits, table bits */
-    unsigned char bits;         /* bits in this part of the code */
-    unsigned short val;         /* offset in table or code value */
-} code;
-
-/* op values as set by inflate_table():
-    00000000 - literal
-    0000tttt - table link, tttt != 0 is the number of table index bits
-    0001eeee - length or distance, eeee is the number of extra bits
-    01100000 - end of block
-    01000000 - invalid code
- */
-
-/* Maximum size of dynamic tree.  The maximum found in a long but non-
-   exhaustive search was 1004 code structures (850 for length/literals
-   and 154 for distances, the latter actually the result of an
-   exhaustive search).  The true maximum is not known, but the value
-   below is more than safe. */
-#define ENOUGH 1440
-#define MAXD 154
-
-/* Type of code to build for inftable() */
-typedef enum {
-    CODES,
-    LENS,
-    DISTS
-} codetype;
-
-extern int inflate_table OF((codetype type, unsigned short FAR *lens,
-                             unsigned codes, code FAR * FAR *table,
-                             unsigned FAR *bits, unsigned short FAR *work));

sys/src/cmd/gs/zlib/trees.c

@@ -1,1224 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2003 Jean-loup Gailly
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- *  ALGORITHM
- *
- *      The "deflation" process uses several Huffman trees. The more
- *      common source values are represented by shorter bit sequences.
- *
- *      Each code tree is stored in a compressed form which is itself
- * a Huffman encoding of the lengths of all the code strings (in
- * ascending order by source values).  The actual code strings are
- * reconstructed from the lengths in the inflate process, as described
- * in the deflate specification.
- *
- *  REFERENCES
- *
- *      Deutsch, L.P.,"'Deflate' Compressed Data Format Specification".
- *      Available in ftp.uu.net:/pub/archiving/zip/doc/deflate-1.1.doc
- *
- *      Storer, James A.
- *          Data Compression:  Methods and Theory, pp. 49-50.
- *          Computer Science Press, 1988.  ISBN 0-7167-8156-5.
- *
- *      Sedgewick, R.
- *          Algorithms, p290.
- *          Addison-Wesley, 1983. ISBN 0-201-06672-6.
- */
-
-/* @(#) $Id: trees.c,v 1.1.1.1 2005/04/24 21:39:39 giles Exp $ */
-
-/* #define GEN_TREES_H */
-
-#include "deflate.h"
-
-#ifdef DEBUG
-#  include <ctype.h>
-#endif
-
-/* ===========================================================================
- * Constants
- */
-
-#define MAX_BL_BITS 7
-/* Bit length codes must not exceed MAX_BL_BITS bits */
-
-#define END_BLOCK 256
-/* end of block literal code */
-
-#define REP_3_6      16
-/* repeat previous bit length 3-6 times (2 bits of repeat count) */
-
-#define REPZ_3_10    17
-/* repeat a zero length 3-10 times  (3 bits of repeat count) */
-
-#define REPZ_11_138  18
-/* repeat a zero length 11-138 times  (7 bits of repeat count) */
-
-local const int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
-   = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
-
-local const int extra_dbits[D_CODES] /* extra bits for each distance code */
-   = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-local const int extra_blbits[BL_CODES]/* extra bits for each bit length code */
-   = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
-
-local const uch bl_order[BL_CODES]
-   = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
-/* The lengths of the bit length codes are sent in order of decreasing
- * probability, to avoid transmitting the lengths for unused bit length codes.
- */
-
-#define Buf_size (8 * 2*sizeof(char))
-/* Number of bits used within bi_buf. (bi_buf might be implemented on
- * more than 16 bits on some systems.)
- */
-
-/* ===========================================================================
- * Local data. These are initialized only once.
- */
-
-#define DIST_CODE_LEN  512 /* see definition of array dist_code below */
-
-#if defined(GEN_TREES_H) || !defined(STDC)
-/* non ANSI compilers may not accept trees.h */
-
-local ct_data static_ltree[L_CODES+2];
-/* The static literal tree. Since the bit lengths are imposed, there is no
- * need for the L_CODES extra codes used during heap construction. However
- * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
- * below).
- */
-
-local ct_data static_dtree[D_CODES];
-/* The static distance tree. (Actually a trivial tree since all codes use
- * 5 bits.)
- */
-
-uch _dist_code[DIST_CODE_LEN];
-/* Distance codes. The first 256 values correspond to the distances
- * 3 .. 258, the last 256 values correspond to the top 8 bits of
- * the 15 bit distances.
- */
-
-uch _length_code[MAX_MATCH-MIN_MATCH+1];
-/* length code for each normalized match length (0 == MIN_MATCH) */
-
-local int base_length[LENGTH_CODES];
-/* First normalized length for each code (0 = MIN_MATCH) */
-
-local int base_dist[D_CODES];
-/* First normalized distance for each code (0 = distance of 1) */
-
-#else
-#  include "trees.h"
-#endif /* GEN_TREES_H */
-
-struct static_tree_desc_s {
-    const ct_data *static_tree;  /* static tree or NULL */
-    const intf *extra_bits;      /* extra bits for each code or NULL */
-    int     extra_base;          /* base index for extra_bits */
-    int     elems;               /* max number of elements in the tree */
-    int     max_length;          /* max bit length for the codes */
-};
-
-local static_tree_desc  static_l_desc =
-{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
-
-local static_tree_desc  static_d_desc =
-{static_dtree, extra_dbits, 0,          D_CODES, MAX_BITS};
-
-local static_tree_desc  static_bl_desc =
-{(const ct_data *)0, extra_blbits, 0,   BL_CODES, MAX_BL_BITS};
-
-/* ===========================================================================
- * Local (static) routines in this file.
- */
-
-local void tr_static_init OF((void));
-local void init_block     OF((deflate_state *s));
-local void pqdownheap     OF((deflate_state *s, ct_data *tree, int k));
-local void gen_bitlen     OF((deflate_state *s, tree_desc *desc));
-local void gen_codes      OF((ct_data *tree, int max_code, ushf *bl_count));
-local void build_tree     OF((deflate_state *s, tree_desc *desc));
-local void scan_tree      OF((deflate_state *s, ct_data *tree, int max_code));
-local void send_tree      OF((deflate_state *s, ct_data *tree, int max_code));
-local int  build_bl_tree  OF((deflate_state *s));
-local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
-                              int blcodes));
-local void compress_block OF((deflate_state *s, ct_data *ltree,
-                              ct_data *dtree));
-local void set_data_type  OF((deflate_state *s));
-local unsigned bi_reverse OF((unsigned value, int length));
-local void bi_windup      OF((deflate_state *s));
-local void bi_flush       OF((deflate_state *s));
-local void copy_block     OF((deflate_state *s, charf *buf, unsigned len,
-                              int header));
-
-#ifdef GEN_TREES_H
-local void gen_trees_header OF((void));
-#endif
-
-#ifndef DEBUG
-#  define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
-   /* Send a code of the given tree. c and tree must not have side effects */
-
-#else /* DEBUG */
-#  define send_code(s, c, tree) \
-     { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
-       send_bits(s, tree[c].Code, tree[c].Len); }
-#endif
-
-/* ===========================================================================
- * Output a short LSB first on the stream.
- * IN assertion: there is enough room in pendingBuf.
- */
-#define put_short(s, w) { \
-    put_byte(s, (uch)((w) & 0xff)); \
-    put_byte(s, (uch)((ush)(w) >> 8)); \
-}
-
-/* ===========================================================================
- * Send a value on a given number of bits.
- * IN assertion: length <= 16 and value fits in length bits.
- */
-#ifdef DEBUG
-local void send_bits      OF((deflate_state *s, int value, int length));
-
-local void send_bits(s, value, length)
-    deflate_state *s;
-    int value;  /* value to send */
-    int length; /* number of bits */
-{
-    Tracevv((stderr," l %2d v %4x ", length, value));
-    Assert(length > 0 && length <= 15, "invalid length");
-    s->bits_sent += (ulg)length;
-
-    /* If not enough room in bi_buf, use (valid) bits from bi_buf and
-     * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
-     * unused bits in value.
-     */
-    if (s->bi_valid > (int)Buf_size - length) {
-        s->bi_buf |= (value << s->bi_valid);
-        put_short(s, s->bi_buf);
-        s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
-        s->bi_valid += length - Buf_size;
-    } else {
-        s->bi_buf |= value << s->bi_valid;
-        s->bi_valid += length;
-    }
-}
-#else /* !DEBUG */
-
-#define send_bits(s, value, length) \
-{ int len = length;\
-  if (s->bi_valid > (int)Buf_size - len) {\
-    int val = value;\
-    s->bi_buf |= (val << s->bi_valid);\
-    put_short(s, s->bi_buf);\
-    s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
-    s->bi_valid += len - Buf_size;\
-  } else {\
-    s->bi_buf |= (value) << s->bi_valid;\
-    s->bi_valid += len;\
-  }\
-}
-#endif /* DEBUG */
-
-
-/* the arguments must not have side effects */
-
-/* ===========================================================================
- * Initialize the various 'constant' tables.
- */
-local void tr_static_init()
-{
-#if defined(GEN_TREES_H) || !defined(STDC)
-    static int static_init_done = 0;
-    int n;        /* iterates over tree elements */
-    int bits;     /* bit counter */
-    int length;   /* length value */
-    int code;     /* code value */
-    int dist;     /* distance index */
-    ush bl_count[MAX_BITS+1];
-    /* number of codes at each bit length for an optimal tree */
-
-    if (static_init_done) return;
-
-    /* For some embedded targets, global variables are not initialized: */
-    static_l_desc.static_tree = static_ltree;
-    static_l_desc.extra_bits = extra_lbits;
-    static_d_desc.static_tree = static_dtree;
-    static_d_desc.extra_bits = extra_dbits;
-    static_bl_desc.extra_bits = extra_blbits;
-
-    /* Initialize the mapping length (0..255) -> length code (0..28) */
-    length = 0;
-    for (code = 0; code < LENGTH_CODES-1; code++) {
-        base_length[code] = length;
-        for (n = 0; n < (1<<extra_lbits[code]); n++) {
-            _length_code[length++] = (uch)code;
-        }
-    }
-    Assert (length == 256, "tr_static_init: length != 256");
-    /* Note that the length 255 (match length 258) can be represented
-     * in two different ways: code 284 + 5 bits or code 285, so we
-     * overwrite length_code[255] to use the best encoding:
-     */
-    _length_code[length-1] = (uch)code;
-
-    /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
-    dist = 0;
-    for (code = 0 ; code < 16; code++) {
-        base_dist[code] = dist;
-        for (n = 0; n < (1<<extra_dbits[code]); n++) {
-            _dist_code[dist++] = (uch)code;
-        }
-    }
-    Assert (dist == 256, "tr_static_init: dist != 256");
-    dist >>= 7; /* from now on, all distances are divided by 128 */
-    for ( ; code < D_CODES; code++) {
-        base_dist[code] = dist << 7;
-        for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
-            _dist_code[256 + dist++] = (uch)code;
-        }
-    }
-    Assert (dist == 256, "tr_static_init: 256+dist != 512");
-
-    /* Construct the codes of the static literal tree */
-    for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
-    n = 0;
-    while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
-    while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
-    while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
-    while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
-    /* Codes 286 and 287 do not exist, but we must include them in the
-     * tree construction to get a canonical Huffman tree (longest code
-     * all ones)
-     */
-    gen_codes((ct_data *)static_ltree, L_CODES+1, bl_count);
-
-    /* The static distance tree is trivial: */
-    for (n = 0; n < D_CODES; n++) {
-        static_dtree[n].Len = 5;
-        static_dtree[n].Code = bi_reverse((unsigned)n, 5);
-    }
-    static_init_done = 1;
-
-#  ifdef GEN_TREES_H
-    gen_trees_header();
-#  endif
-#endif /* defined(GEN_TREES_H) || !defined(STDC) */
-}
-
-/* ===========================================================================
- * Genererate the file trees.h describing the static trees.
- */
-#ifdef GEN_TREES_H
-#  ifndef DEBUG
-#    include <stdio.h>
-#  endif
-
-#  define SEPARATOR(i, last, width) \
-      ((i) == (last)? "\n};\n\n" :    \
-       ((i) % (width) == (width)-1 ? ",\n" : ", "))
-
-void gen_trees_header()
-{
-    FILE *header = fopen("trees.h", "w");
-    int i;
-
-    Assert (header != NULL, "Can't open trees.h");
-    fprintf(header,
-            "/* header created automatically with -DGEN_TREES_H */\n\n");
-
-    fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
-    for (i = 0; i < L_CODES+2; i++) {
-        fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
-                static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
-    }
-
-    fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
-    for (i = 0; i < D_CODES; i++) {
-        fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
-                static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
-    }
-
-    fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
-    for (i = 0; i < DIST_CODE_LEN; i++) {
-        fprintf(header, "%2u%s", _dist_code[i],
-                SEPARATOR(i, DIST_CODE_LEN-1, 20));
-    }
-
-    fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
-    for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
-        fprintf(header, "%2u%s", _length_code[i],
-                SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
-    }
-
-    fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
-    for (i = 0; i < LENGTH_CODES; i++) {
-        fprintf(header, "%1u%s", base_length[i],
-                SEPARATOR(i, LENGTH_CODES-1, 20));
-    }
-
-    fprintf(header, "local const int base_dist[D_CODES] = {\n");
-    for (i = 0; i < D_CODES; i++) {
-        fprintf(header, "%5u%s", base_dist[i],
-                SEPARATOR(i, D_CODES-1, 10));
-    }
-
-    fclose(header);
-}
-#endif /* GEN_TREES_H */
-
-/* ===========================================================================
- * Initialize the tree data structures for a new zlib stream.
- */
-void _tr_init(s)
-    deflate_state *s;
-{
-    tr_static_init();
-
-    s->l_desc.dyn_tree = s->dyn_ltree;
-    s->l_desc.stat_desc = &static_l_desc;
-
-    s->d_desc.dyn_tree = s->dyn_dtree;
-    s->d_desc.stat_desc = &static_d_desc;
-
-    s->bl_desc.dyn_tree = s->bl_tree;
-    s->bl_desc.stat_desc = &static_bl_desc;
-
-    s->bi_buf = 0;
-    s->bi_valid = 0;
-    s->last_eob_len = 8; /* enough lookahead for inflate */
-#ifdef DEBUG
-    s->compressed_len = 0L;
-    s->bits_sent = 0L;
-#endif
-
-    /* Initialize the first block of the first file: */
-    init_block(s);
-}
-
-/* ===========================================================================
- * Initialize a new block.
- */
-local void init_block(s)
-    deflate_state *s;
-{
-    int n; /* iterates over tree elements */
-
-    /* Initialize the trees. */
-    for (n = 0; n < L_CODES;  n++) s->dyn_ltree[n].Freq = 0;
-    for (n = 0; n < D_CODES;  n++) s->dyn_dtree[n].Freq = 0;
-    for (n = 0; n < BL_CODES; n++) s->bl_tree[n].Freq = 0;
-
-    s->dyn_ltree[END_BLOCK].Freq = 1;
-    s->opt_len = s->static_len = 0L;
-    s->last_lit = s->matches = 0;
-}
-
-#define SMALLEST 1
-/* Index within the heap array of least frequent node in the Huffman tree */
-
-
-/* ===========================================================================
- * Remove the smallest element from the heap and recreate the heap with
- * one less element. Updates heap and heap_len.
- */
-#define pqremove(s, tree, top) \
-{\
-    top = s->heap[SMALLEST]; \
-    s->heap[SMALLEST] = s->heap[s->heap_len--]; \
-    pqdownheap(s, tree, SMALLEST); \
-}
-
-/* ===========================================================================
- * Compares to subtrees, using the tree depth as tie breaker when
- * the subtrees have equal frequency. This minimizes the worst case length.
- */
-#define smaller(tree, n, m, depth) \
-   (tree[n].Freq < tree[m].Freq || \
-   (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
-
-/* ===========================================================================
- * Restore the heap property by moving down the tree starting at node k,
- * exchanging a node with the smallest of its two sons if necessary, stopping
- * when the heap property is re-established (each father smaller than its
- * two sons).
- */
-local void pqdownheap(s, tree, k)
-    deflate_state *s;
-    ct_data *tree;  /* the tree to restore */
-    int k;               /* node to move down */
-{
-    int v = s->heap[k];
-    int j = k << 1;  /* left son of k */
-    while (j <= s->heap_len) {
-        /* Set j to the smallest of the two sons: */
-        if (j < s->heap_len &&
-            smaller(tree, s->heap[j+1], s->heap[j], s->depth)) {
-            j++;
-        }
-        /* Exit if v is smaller than both sons */
-        if (smaller(tree, v, s->heap[j], s->depth)) break;
-
-        /* Exchange v with the smallest son */
-        s->heap[k] = s->heap[j];  k = j;
-
-        /* And continue down the tree, setting j to the left son of k */
-        j <<= 1;
-    }
-    s->heap[k] = v;
-}
-
-/* ===========================================================================
- * Compute the optimal bit lengths for a tree and update the total bit length
- * for the current block.
- * IN assertion: the fields freq and dad are set, heap[heap_max] and
- *    above are the tree nodes sorted by increasing frequency.
- * OUT assertions: the field len is set to the optimal bit length, the
- *     array bl_count contains the frequencies for each bit length.
- *     The length opt_len is updated; static_len is also updated if stree is
- *     not null.
- */
-local void gen_bitlen(s, desc)
-    deflate_state *s;
-    tree_desc *desc;    /* the tree descriptor */
-{
-    ct_data *tree        = desc->dyn_tree;
-    int max_code         = desc->max_code;
-    const ct_data *stree = desc->stat_desc->static_tree;
-    const intf *extra    = desc->stat_desc->extra_bits;
-    int base             = desc->stat_desc->extra_base;
-    int max_length       = desc->stat_desc->max_length;
-    int h;              /* heap index */
-    int n, m;           /* iterate over the tree elements */
-    int bits;           /* bit length */
-    int xbits;          /* extra bits */
-    ush f;              /* frequency */
-    int overflow = 0;   /* number of elements with bit length too large */
-
-    for (bits = 0; bits <= MAX_BITS; bits++) s->bl_count[bits] = 0;
-
-    /* In a first pass, compute the optimal bit lengths (which may
-     * overflow in the case of the bit length tree).
-     */
-    tree[s->heap[s->heap_max]].Len = 0; /* root of the heap */
-
-    for (h = s->heap_max+1; h < HEAP_SIZE; h++) {
-        n = s->heap[h];
-        bits = tree[tree[n].Dad].Len + 1;
-        if (bits > max_length) bits = max_length, overflow++;
-        tree[n].Len = (ush)bits;
-        /* We overwrite tree[n].Dad which is no longer needed */
-
-        if (n > max_code) continue; /* not a leaf node */
-
-        s->bl_count[bits]++;
-        xbits = 0;
-        if (n >= base) xbits = extra[n-base];
-        f = tree[n].Freq;
-        s->opt_len += (ulg)f * (bits + xbits);
-        if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
-    }
-    if (overflow == 0) return;
-
-    Trace((stderr,"\nbit length overflow\n"));
-    /* This happens for example on obj2 and pic of the Calgary corpus */
-
-    /* Find the first bit length which could increase: */
-    do {
-        bits = max_length-1;
-        while (s->bl_count[bits] == 0) bits--;
-        s->bl_count[bits]--;      /* move one leaf down the tree */
-        s->bl_count[bits+1] += 2; /* move one overflow item as its brother */
-        s->bl_count[max_length]--;
-        /* The brother of the overflow item also moves one step up,
-         * but this does not affect bl_count[max_length]
-         */
-        overflow -= 2;
-    } while (overflow > 0);
-
-    /* Now recompute all bit lengths, scanning in increasing frequency.
-     * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
-     * lengths instead of fixing only the wrong ones. This idea is taken
-     * from 'ar' written by Haruhiko Okumura.)
-     */
-    for (bits = max_length; bits != 0; bits--) {
-        n = s->bl_count[bits];
-        while (n != 0) {
-            m = s->heap[--h];
-            if (m > max_code) continue;
-            if (tree[m].Len != (unsigned) bits) {
-                Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
-                s->opt_len += ((long)bits - (long)tree[m].Len)
-                              *(long)tree[m].Freq;
-                tree[m].Len = (ush)bits;
-            }
-            n--;
-        }
-    }
-}
-
-/* ===========================================================================
- * Generate the codes for a given tree and bit counts (which need not be
- * optimal).
- * IN assertion: the array bl_count contains the bit length statistics for
- * the given tree and the field len is set for all tree elements.
- * OUT assertion: the field code is set for all tree elements of non
- *     zero code length.
- */
-local void gen_codes (tree, max_code, bl_count)
-    ct_data *tree;             /* the tree to decorate */
-    int max_code;              /* largest code with non zero frequency */
-    ushf *bl_count;            /* number of codes at each bit length */
-{
-    ush next_code[MAX_BITS+1]; /* next code value for each bit length */
-    ush code = 0;              /* running code value */
-    int bits;                  /* bit index */
-    int n;                     /* code index */
-
-    /* The distribution counts are first used to generate the code values
-     * without bit reversal.
-     */
-    for (bits = 1; bits <= MAX_BITS; bits++) {
-        next_code[bits] = code = (code + bl_count[bits-1]) << 1;
-    }
-    /* Check that the bit counts in bl_count are consistent. The last code
-     * must be all ones.
-     */
-    Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
-            "inconsistent bit counts");
-    Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
-
-    for (n = 0;  n <= max_code; n++) {
-        int len = tree[n].Len;
-        if (len == 0) continue;
-        /* Now reverse the bits */
-        tree[n].Code = bi_reverse(next_code[len]++, len);
-
-        Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
-             n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
-    }
-}
-
-/* ===========================================================================
- * Construct one Huffman tree and assigns the code bit strings and lengths.
- * Update the total bit length for the current block.
- * IN assertion: the field freq is set for all tree elements.
- * OUT assertions: the fields len and code are set to the optimal bit length
- *     and corresponding code. The length opt_len is updated; static_len is
- *     also updated if stree is not null. The field max_code is set.
- */
-local void build_tree(s, desc)
-    deflate_state *s;
-    tree_desc *desc; /* the tree descriptor */
-{
-    ct_data *tree         = desc->dyn_tree;
-    const ct_data *stree  = desc->stat_desc->static_tree;
-    int elems             = desc->stat_desc->elems;
-    int n, m;          /* iterate over heap elements */
-    int max_code = -1; /* largest code with non zero frequency */
-    int node;          /* new node being created */
-
-    /* Construct the initial heap, with least frequent element in
-     * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
-     * heap[0] is not used.
-     */
-    s->heap_len = 0, s->heap_max = HEAP_SIZE;
-
-    for (n = 0; n < elems; n++) {
-        if (tree[n].Freq != 0) {
-            s->heap[++(s->heap_len)] = max_code = n;
-            s->depth[n] = 0;
-        } else {
-            tree[n].Len = 0;
-        }
-    }
-
-    /* The pkzip format requires that at least one distance code exists,
-     * and that at least one bit should be sent even if there is only one
-     * possible code. So to avoid special checks later on we force at least
-     * two codes of non zero frequency.
-     */
-    while (s->heap_len < 2) {
-        node = s->heap[++(s->heap_len)] = (max_code < 2 ? ++max_code : 0);
-        tree[node].Freq = 1;
-        s->depth[node] = 0;
-        s->opt_len--; if (stree) s->static_len -= stree[node].Len;
-        /* node is 0 or 1 so it does not have extra bits */
-    }
-    desc->max_code = max_code;
-
-    /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
-     * establish sub-heaps of increasing lengths:
-     */
-    for (n = s->heap_len/2; n >= 1; n--) pqdownheap(s, tree, n);
-
-    /* Construct the Huffman tree by repeatedly combining the least two
-     * frequent nodes.
-     */
-    node = elems;              /* next internal node of the tree */
-    do {
-        pqremove(s, tree, n);  /* n = node of least frequency */
-        m = s->heap[SMALLEST]; /* m = node of next least frequency */
-
-        s->heap[--(s->heap_max)] = n; /* keep the nodes sorted by frequency */
-        s->heap[--(s->heap_max)] = m;
-
-        /* Create a new node father of n and m */
-        tree[node].Freq = tree[n].Freq + tree[m].Freq;
-        s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
-                                s->depth[n] : s->depth[m]) + 1);
-        tree[n].Dad = tree[m].Dad = (ush)node;
-#ifdef DUMP_BL_TREE
-        if (tree == s->bl_tree) {
-            fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
-                    node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
-        }
-#endif
-        /* and insert the new node in the heap */
-        s->heap[SMALLEST] = node++;
-        pqdownheap(s, tree, SMALLEST);
-
-    } while (s->heap_len >= 2);
-
-    s->heap[--(s->heap_max)] = s->heap[SMALLEST];
-
-    /* At this point, the fields freq and dad are set. We can now
-     * generate the bit lengths.
-     */
-    gen_bitlen(s, (tree_desc *)desc);
-
-    /* The field len is now set, we can generate the bit codes */
-    gen_codes ((ct_data *)tree, max_code, s->bl_count);
-}
-
-/* ===========================================================================
- * Scan a literal or distance tree to determine the frequencies of the codes
- * in the bit length tree.
- */
-local void scan_tree (s, tree, max_code)
-    deflate_state *s;
-    ct_data *tree;   /* the tree to be scanned */
-    int max_code;    /* and its largest code of non zero frequency */
-{
-    int n;                     /* iterates over all tree elements */
-    int prevlen = -1;          /* last emitted length */
-    int curlen;                /* length of current code */
-    int nextlen = tree[0].Len; /* length of next code */
-    int count = 0;             /* repeat count of the current code */
-    int max_count = 7;         /* max repeat count */
-    int min_count = 4;         /* min repeat count */
-
-    if (nextlen == 0) max_count = 138, min_count = 3;
-    tree[max_code+1].Len = (ush)0xffff; /* guard */
-
-    for (n = 0; n <= max_code; n++) {
-        curlen = nextlen; nextlen = tree[n+1].Len;
-        if (++count < max_count && curlen == nextlen) {
-            continue;
-        } else if (count < min_count) {
-            s->bl_tree[curlen].Freq += count;
-        } else if (curlen != 0) {
-            if (curlen != prevlen) s->bl_tree[curlen].Freq++;
-            s->bl_tree[REP_3_6].Freq++;
-        } else if (count <= 10) {
-            s->bl_tree[REPZ_3_10].Freq++;
-        } else {
-            s->bl_tree[REPZ_11_138].Freq++;
-        }
-        count = 0; prevlen = curlen;
-        if (nextlen == 0) {
-            max_count = 138, min_count = 3;
-        } else if (curlen == nextlen) {
-            max_count = 6, min_count = 3;
-        } else {
-            max_count = 7, min_count = 4;
-        }
-    }
-}
-
-/* ===========================================================================
- * Send a literal or distance tree in compressed form, using the codes in
- * bl_tree.
- */
-local void send_tree (s, tree, max_code)
-    deflate_state *s;
-    ct_data *tree; /* the tree to be scanned */
-    int max_code;       /* and its largest code of non zero frequency */
-{
-    int n;                     /* iterates over all tree elements */
-    int prevlen = -1;          /* last emitted length */
-    int curlen;                /* length of current code */
-    int nextlen = tree[0].Len; /* length of next code */
-    int count = 0;             /* repeat count of the current code */
-    int max_count = 7;         /* max repeat count */
-    int min_count = 4;         /* min repeat count */
-
-    /* tree[max_code+1].Len = -1; */  /* guard already set */
-    if (nextlen == 0) max_count = 138, min_count = 3;
-
-    for (n = 0; n <= max_code; n++) {
-        curlen = nextlen; nextlen = tree[n+1].Len;
-        if (++count < max_count && curlen == nextlen) {
-            continue;
-        } else if (count < min_count) {
-            do { send_code(s, curlen, s->bl_tree); } while (--count != 0);
-
-        } else if (curlen != 0) {
-            if (curlen != prevlen) {
-                send_code(s, curlen, s->bl_tree); count--;
-            }
-            Assert(count >= 3 && count <= 6, " 3_6?");
-            send_code(s, REP_3_6, s->bl_tree); send_bits(s, count-3, 2);
-
-        } else if (count <= 10) {
-            send_code(s, REPZ_3_10, s->bl_tree); send_bits(s, count-3, 3);
-
-        } else {
-            send_code(s, REPZ_11_138, s->bl_tree); send_bits(s, count-11, 7);
-        }
-        count = 0; prevlen = curlen;
-        if (nextlen == 0) {
-            max_count = 138, min_count = 3;
-        } else if (curlen == nextlen) {
-            max_count = 6, min_count = 3;
-        } else {
-            max_count = 7, min_count = 4;
-        }
-    }
-}
-
-/* ===========================================================================
- * Construct the Huffman tree for the bit lengths and return the index in
- * bl_order of the last bit length code to send.
- */
-local int build_bl_tree(s)
-    deflate_state *s;
-{
-    int max_blindex;  /* index of last bit length code of non zero freq */
-
-    /* Determine the bit length frequencies for literal and distance trees */
-    scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
-    scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
-
-    /* Build the bit length tree: */
-    build_tree(s, (tree_desc *)(&(s->bl_desc)));
-    /* opt_len now includes the length of the tree representations, except
-     * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
-     */
-
-    /* Determine the number of bit length codes to send. The pkzip format
-     * requires that at least 4 bit length codes be sent. (appnote.txt says
-     * 3 but the actual value used is 4.)
-     */
-    for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
-        if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
-    }
-    /* Update opt_len to include the bit length tree and counts */
-    s->opt_len += 3*(max_blindex+1) + 5+5+4;
-    Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
-            s->opt_len, s->static_len));
-
-    return max_blindex;
-}
-
-/* ===========================================================================
- * Send the header for a block using dynamic Huffman trees: the counts, the
- * lengths of the bit length codes, the literal tree and the distance tree.
- * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
- */
-local void send_all_trees(s, lcodes, dcodes, blcodes)
-    deflate_state *s;
-    int lcodes, dcodes, blcodes; /* number of codes for each tree */
-{
-    int rank;                    /* index in bl_order */
-
-    Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
-    Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
-            "too many codes");
-    Tracev((stderr, "\nbl counts: "));
-    send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
-    send_bits(s, dcodes-1,   5);
-    send_bits(s, blcodes-4,  4); /* not -3 as stated in appnote.txt */
-    for (rank = 0; rank < blcodes; rank++) {
-        Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
-        send_bits(s, s->bl_tree[bl_order[rank]].Len, 3);
-    }
-    Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
-
-    send_tree(s, (ct_data *)s->dyn_ltree, lcodes-1); /* literal tree */
-    Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
-
-    send_tree(s, (ct_data *)s->dyn_dtree, dcodes-1); /* distance tree */
-    Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
-}
-
-/* ===========================================================================
- * Send a stored block
- */
-void _tr_stored_block(s, buf, stored_len, eof)
-    deflate_state *s;
-    charf *buf;       /* input block */
-    ulg stored_len;   /* length of input block */
-    int eof;          /* true if this is the last block for a file */
-{
-    send_bits(s, (STORED_BLOCK<<1)+eof, 3);  /* send block type */
-#ifdef DEBUG
-    s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
-    s->compressed_len += (stored_len + 4) << 3;
-#endif
-    copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
-}
-
-/* ===========================================================================
- * Send one empty static block to give enough lookahead for inflate.
- * This takes 10 bits, of which 7 may remain in the bit buffer.
- * The current inflate code requires 9 bits of lookahead. If the
- * last two codes for the previous block (real code plus EOB) were coded
- * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
- * the last real code. In this case we send two empty static blocks instead
- * of one. (There are no problems if the previous block is stored or fixed.)
- * To simplify the code, we assume the worst case of last real code encoded
- * on one bit only.
- */
-void _tr_align(s)
-    deflate_state *s;
-{
-    send_bits(s, STATIC_TREES<<1, 3);
-    send_code(s, END_BLOCK, static_ltree);
-#ifdef DEBUG
-    s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
-#endif
-    bi_flush(s);
-    /* Of the 10 bits for the empty block, we have already sent
-     * (10 - bi_valid) bits. The lookahead for the last real code (before
-     * the EOB of the previous block) was thus at least one plus the length
-     * of the EOB plus what we have just sent of the empty static block.
-     */
-    if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
-        send_bits(s, STATIC_TREES<<1, 3);
-        send_code(s, END_BLOCK, static_ltree);
-#ifdef DEBUG
-        s->compressed_len += 10L;
-#endif
-        bi_flush(s);
-    }
-    s->last_eob_len = 7;
-}
-
-/* ===========================================================================
- * Determine the best encoding for the current block: dynamic trees, static
- * trees or store, and output the encoded block to the zip file.
- */
-void _tr_flush_block(s, buf, stored_len, eof)
-    deflate_state *s;
-    charf *buf;       /* input block, or NULL if too old */
-    ulg stored_len;   /* length of input block */
-    int eof;          /* true if this is the last block for a file */
-{
-    ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
-    int max_blindex = 0;  /* index of last bit length code of non zero freq */
-
-    /* Build the Huffman trees unless a stored block is forced */
-    if (s->level > 0) {
-
-         /* Check if the file is ascii or binary */
-        if (s->strm->data_type == Z_UNKNOWN) set_data_type(s);
-
-        /* Construct the literal and distance trees */
-        build_tree(s, (tree_desc *)(&(s->l_desc)));
-        Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
-                s->static_len));
-
-        build_tree(s, (tree_desc *)(&(s->d_desc)));
-        Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
-                s->static_len));
-        /* At this point, opt_len and static_len are the total bit lengths of
-         * the compressed block data, excluding the tree representations.
-         */
-
-        /* Build the bit length tree for the above two trees, and get the index
-         * in bl_order of the last bit length code to send.
-         */
-        max_blindex = build_bl_tree(s);
-
-        /* Determine the best encoding. Compute the block lengths in bytes. */
-        opt_lenb = (s->opt_len+3+7)>>3;
-        static_lenb = (s->static_len+3+7)>>3;
-
-        Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
-                opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
-                s->last_lit));
-
-        if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
-
-    } else {
-        Assert(buf != (char*)0, "lost buf");
-        opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
-    }
-
-#ifdef FORCE_STORED
-    if (buf != (char*)0) { /* force stored block */
-#else
-    if (stored_len+4 <= opt_lenb && buf != (char*)0) {
-                       /* 4: two words for the lengths */
-#endif
-        /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
-         * Otherwise we can't have processed more than WSIZE input bytes since
-         * the last block flush, because compression would have been
-         * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
-         * transform a block into a stored block.
-         */
-        _tr_stored_block(s, buf, stored_len, eof);
-
-#ifdef FORCE_STATIC
-    } else if (static_lenb >= 0) { /* force static trees */
-#else
-    } else if (static_lenb == opt_lenb) {
-#endif
-        send_bits(s, (STATIC_TREES<<1)+eof, 3);
-        compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
-#ifdef DEBUG
-        s->compressed_len += 3 + s->static_len;
-#endif
-    } else {
-        send_bits(s, (DYN_TREES<<1)+eof, 3);
-        send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
-                       max_blindex+1);
-        compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
-#ifdef DEBUG
-        s->compressed_len += 3 + s->opt_len;
-#endif
-    }
-    Assert (s->compressed_len == s->bits_sent, "bad compressed size");
-    /* The above check is made mod 2^32, for files larger than 512 MB
-     * and uLong implemented on 32 bits.
-     */
-    init_block(s);
-
-    if (eof) {
-        bi_windup(s);
-#ifdef DEBUG
-        s->compressed_len += 7;  /* align on byte boundary */
-#endif
-    }
-    Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
-           s->compressed_len-7*eof));
-}
-
-/* ===========================================================================
- * Save the match info and tally the frequency counts. Return true if
- * the current block must be flushed.
- */
-int _tr_tally (s, dist, lc)
-    deflate_state *s;
-    unsigned dist;  /* distance of matched string */
-    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
-{
-    s->d_buf[s->last_lit] = (ush)dist;
-    s->l_buf[s->last_lit++] = (uch)lc;
-    if (dist == 0) {
-        /* lc is the unmatched char */
-        s->dyn_ltree[lc].Freq++;
-    } else {
-        s->matches++;
-        /* Here, lc is the match length - MIN_MATCH */
-        dist--;             /* dist = match distance - 1 */
-        Assert((ush)dist < (ush)MAX_DIST(s) &&
-               (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
-               (ush)d_code(dist) < (ush)D_CODES,  "_tr_tally: bad match");
-
-        s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
-        s->dyn_dtree[d_code(dist)].Freq++;
-    }
-
-#ifdef TRUNCATE_BLOCK
-    /* Try to guess if it is profitable to stop the current block here */
-    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
-        /* Compute an upper bound for the compressed length */
-        ulg out_length = (ulg)s->last_lit*8L;
-        ulg in_length = (ulg)((long)s->strstart - s->block_start);
-        int dcode;
-        for (dcode = 0; dcode < D_CODES; dcode++) {
-            out_length += (ulg)s->dyn_dtree[dcode].Freq *
-                (5L+extra_dbits[dcode]);
-        }
-        out_length >>= 3;
-        Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
-               s->last_lit, in_length, out_length,
-               100L - out_length*100L/in_length));
-        if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
-    }
-#endif
-    return (s->last_lit == s->lit_bufsize-1);
-    /* We avoid equality with lit_bufsize because of wraparound at 64K
-     * on 16 bit machines and because stored blocks are restricted to
-     * 64K-1 bytes.
-     */
-}
-
-/* ===========================================================================
- * Send the block data compressed using the given Huffman trees
- */
-local void compress_block(s, ltree, dtree)
-    deflate_state *s;
-    ct_data *ltree; /* literal tree */
-    ct_data *dtree; /* distance tree */
-{
-    unsigned dist;      /* distance of matched string */
-    int lc;             /* match length or unmatched char (if dist == 0) */
-    unsigned lx = 0;    /* running index in l_buf */
-    unsigned code;      /* the code to send */
-    int extra;          /* number of extra bits to send */
-
-    if (s->last_lit != 0) do {
-        dist = s->d_buf[lx];
-        lc = s->l_buf[lx++];
-        if (dist == 0) {
-            send_code(s, lc, ltree); /* send a literal byte */
-            Tracecv(isgraph(lc), (stderr," '%c' ", lc));
-        } else {
-            /* Here, lc is the match length - MIN_MATCH */
-            code = _length_code[lc];
-            send_code(s, code+LITERALS+1, ltree); /* send the length code */
-            extra = extra_lbits[code];
-            if (extra != 0) {
-                lc -= base_length[code];
-                send_bits(s, lc, extra);       /* send the extra length bits */
-            }
-            dist--; /* dist is now the match distance - 1 */
-            code = d_code(dist);
-            Assert (code < D_CODES, "bad d_code");
-
-            send_code(s, code, dtree);       /* send the distance code */
-            extra = extra_dbits[code];
-            if (extra != 0) {
-                dist -= base_dist[code];
-                send_bits(s, dist, extra);   /* send the extra distance bits */
-            }
-        } /* literal or match pair ? */
-
-        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
-        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
-               "pendingBuf overflow");
-
-    } while (lx < s->last_lit);
-
-    send_code(s, END_BLOCK, ltree);
-    s->last_eob_len = ltree[END_BLOCK].Len;
-}
-
-/* ===========================================================================
- * Set the data type to ASCII or BINARY, using a crude approximation:
- * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
- * IN assertion: the fields freq of dyn_ltree are set and the total of all
- * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
- */
-local void set_data_type(s)
-    deflate_state *s;
-{
-    int n = 0;
-    unsigned ascii_freq = 0;
-    unsigned bin_freq = 0;
-    while (n < 7)        bin_freq += s->dyn_ltree[n++].Freq;
-    while (n < 128)    ascii_freq += s->dyn_ltree[n++].Freq;
-    while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
-    s->strm->data_type = bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII;
-}
-
-/* ===========================================================================
- * Reverse the first len bits of a code, using straightforward code (a faster
- * method would use a table)
- * IN assertion: 1 <= len <= 15
- */
-local unsigned bi_reverse(code, len)
-    unsigned code; /* the value to invert */
-    int len;       /* its bit length */
-{
-    register unsigned res = 0;
-    do {
-        res |= code & 1;
-        code >>= 1, res <<= 1;
-    } while (--len > 0);
-    return res >> 1;
-}
-
-/* ===========================================================================
- * Flush the bit buffer, keeping at most 7 bits in it.
- */
-local void bi_flush(s)
-    deflate_state *s;
-{
-    if (s->bi_valid == 16) {
-        put_short(s, s->bi_buf);
-        s->bi_buf = 0;
-        s->bi_valid = 0;
-    } else if (s->bi_valid >= 8) {
-        put_byte(s, (Byte)s->bi_buf);
-        s->bi_buf >>= 8;
-        s->bi_valid -= 8;
-    }
-}
-
-/* ===========================================================================
- * Flush the bit buffer and align the output on a byte boundary
- */
-local void bi_windup(s)
-    deflate_state *s;
-{
-    if (s->bi_valid > 8) {
-        put_short(s, s->bi_buf);
-    } else if (s->bi_valid > 0) {
-        put_byte(s, (Byte)s->bi_buf);
-    }
-    s->bi_buf = 0;
-    s->bi_valid = 0;
-#ifdef DEBUG
-    s->bits_sent = (s->bits_sent+7) & ~7;
-#endif
-}
-
-/* ===========================================================================
- * Copy a stored block, storing first the length and its
- * one's complement if requested.
- */
-local void copy_block(s, buf, len, header)
-    deflate_state *s;
-    charf    *buf;    /* the input data */
-    unsigned len;     /* its length */
-    int      header;  /* true if block header must be written */
-{
-    bi_windup(s);        /* align on byte boundary */
-    s->last_eob_len = 8; /* enough lookahead for inflate */
-
-    if (header) {
-        put_short(s, (ush)len);
-        put_short(s, (ush)~len);
-#ifdef DEBUG
-        s->bits_sent += 2*16;
-#endif
-    }
-#ifdef DEBUG
-    s->bits_sent += (ulg)len<<3;
-#endif
-    while (len--) {
-        put_byte(s, *buf++);
-    }
-}

sys/src/cmd/gs/zlib/trees.h

@@ -1,137 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* header created automatically with -DGEN_TREES_H */
-
-local const ct_data static_ltree[L_CODES+2] = {
-{{ 12},{  8}}, {{140},{  8}}, {{ 76},{  8}}, {{204},{  8}}, {{ 44},{  8}},
-{{172},{  8}}, {{108},{  8}}, {{236},{  8}}, {{ 28},{  8}}, {{156},{  8}},
-{{ 92},{  8}}, {{220},{  8}}, {{ 60},{  8}}, {{188},{  8}}, {{124},{  8}},
-{{252},{  8}}, {{  2},{  8}}, {{130},{  8}}, {{ 66},{  8}}, {{194},{  8}},
-{{ 34},{  8}}, {{162},{  8}}, {{ 98},{  8}}, {{226},{  8}}, {{ 18},{  8}},
-{{146},{  8}}, {{ 82},{  8}}, {{210},{  8}}, {{ 50},{  8}}, {{178},{  8}},
-{{114},{  8}}, {{242},{  8}}, {{ 10},{  8}}, {{138},{  8}}, {{ 74},{  8}},
-{{202},{  8}}, {{ 42},{  8}}, {{170},{  8}}, {{106},{  8}}, {{234},{  8}},
-{{ 26},{  8}}, {{154},{  8}}, {{ 90},{  8}}, {{218},{  8}}, {{ 58},{  8}},
-{{186},{  8}}, {{122},{  8}}, {{250},{  8}}, {{  6},{  8}}, {{134},{  8}},
-{{ 70},{  8}}, {{198},{  8}}, {{ 38},{  8}}, {{166},{  8}}, {{102},{  8}},
-{{230},{  8}}, {{ 22},{  8}}, {{150},{  8}}, {{ 86},{  8}}, {{214},{  8}},
-{{ 54},{  8}}, {{182},{  8}}, {{118},{  8}}, {{246},{  8}}, {{ 14},{  8}},
-{{142},{  8}}, {{ 78},{  8}}, {{206},{  8}}, {{ 46},{  8}}, {{174},{  8}},
-{{110},{  8}}, {{238},{  8}}, {{ 30},{  8}}, {{158},{  8}}, {{ 94},{  8}},
-{{222},{  8}}, {{ 62},{  8}}, {{190},{  8}}, {{126},{  8}}, {{254},{  8}},
-{{  1},{  8}}, {{129},{  8}}, {{ 65},{  8}}, {{193},{  8}}, {{ 33},{  8}},
-{{161},{  8}}, {{ 97},{  8}}, {{225},{  8}}, {{ 17},{  8}}, {{145},{  8}},
-{{ 81},{  8}}, {{209},{  8}}, {{ 49},{  8}}, {{177},{  8}}, {{113},{  8}},
-{{241},{  8}}, {{  9},{  8}}, {{137},{  8}}, {{ 73},{  8}}, {{201},{  8}},
-{{ 41},{  8}}, {{169},{  8}}, {{105},{  8}}, {{233},{  8}}, {{ 25},{  8}},
-{{153},{  8}}, {{ 89},{  8}}, {{217},{  8}}, {{ 57},{  8}}, {{185},{  8}},
-{{121},{  8}}, {{249},{  8}}, {{  5},{  8}}, {{133},{  8}}, {{ 69},{  8}},
-{{197},{  8}}, {{ 37},{  8}}, {{165},{  8}}, {{101},{  8}}, {{229},{  8}},
-{{ 21},{  8}}, {{149},{  8}}, {{ 85},{  8}}, {{213},{  8}}, {{ 53},{  8}},
-{{181},{  8}}, {{117},{  8}}, {{245},{  8}}, {{ 13},{  8}}, {{141},{  8}},
-{{ 77},{  8}}, {{205},{  8}}, {{ 45},{  8}}, {{173},{  8}}, {{109},{  8}},
-{{237},{  8}}, {{ 29},{  8}}, {{157},{  8}}, {{ 93},{  8}}, {{221},{  8}},
-{{ 61},{  8}}, {{189},{  8}}, {{125},{  8}}, {{253},{  8}}, {{ 19},{  9}},
-{{275},{  9}}, {{147},{  9}}, {{403},{  9}}, {{ 83},{  9}}, {{339},{  9}},
-{{211},{  9}}, {{467},{  9}}, {{ 51},{  9}}, {{307},{  9}}, {{179},{  9}},
-{{435},{  9}}, {{115},{  9}}, {{371},{  9}}, {{243},{  9}}, {{499},{  9}},
-{{ 11},{  9}}, {{267},{  9}}, {{139},{  9}}, {{395},{  9}}, {{ 75},{  9}},
-{{331},{  9}}, {{203},{  9}}, {{459},{  9}}, {{ 43},{  9}}, {{299},{  9}},
-{{171},{  9}}, {{427},{  9}}, {{107},{  9}}, {{363},{  9}}, {{235},{  9}},
-{{491},{  9}}, {{ 27},{  9}}, {{283},{  9}}, {{155},{  9}}, {{411},{  9}},
-{{ 91},{  9}}, {{347},{  9}}, {{219},{  9}}, {{475},{  9}}, {{ 59},{  9}},
-{{315},{  9}}, {{187},{  9}}, {{443},{  9}}, {{123},{  9}}, {{379},{  9}},
-{{251},{  9}}, {{507},{  9}}, {{  7},{  9}}, {{263},{  9}}, {{135},{  9}},
-{{391},{  9}}, {{ 71},{  9}}, {{327},{  9}}, {{199},{  9}}, {{455},{  9}},
-{{ 39},{  9}}, {{295},{  9}}, {{167},{  9}}, {{423},{  9}}, {{103},{  9}},
-{{359},{  9}}, {{231},{  9}}, {{487},{  9}}, {{ 23},{  9}}, {{279},{  9}},
-{{151},{  9}}, {{407},{  9}}, {{ 87},{  9}}, {{343},{  9}}, {{215},{  9}},
-{{471},{  9}}, {{ 55},{  9}}, {{311},{  9}}, {{183},{  9}}, {{439},{  9}},
-{{119},{  9}}, {{375},{  9}}, {{247},{  9}}, {{503},{  9}}, {{ 15},{  9}},
-{{271},{  9}}, {{143},{  9}}, {{399},{  9}}, {{ 79},{  9}}, {{335},{  9}},
-{{207},{  9}}, {{463},{  9}}, {{ 47},{  9}}, {{303},{  9}}, {{175},{  9}},
-{{431},{  9}}, {{111},{  9}}, {{367},{  9}}, {{239},{  9}}, {{495},{  9}},
-{{ 31},{  9}}, {{287},{  9}}, {{159},{  9}}, {{415},{  9}}, {{ 95},{  9}},
-{{351},{  9}}, {{223},{  9}}, {{479},{  9}}, {{ 63},{  9}}, {{319},{  9}},
-{{191},{  9}}, {{447},{  9}}, {{127},{  9}}, {{383},{  9}}, {{255},{  9}},
-{{511},{  9}}, {{  0},{  7}}, {{ 64},{  7}}, {{ 32},{  7}}, {{ 96},{  7}},
-{{ 16},{  7}}, {{ 80},{  7}}, {{ 48},{  7}}, {{112},{  7}}, {{  8},{  7}},
-{{ 72},{  7}}, {{ 40},{  7}}, {{104},{  7}}, {{ 24},{  7}}, {{ 88},{  7}},
-{{ 56},{  7}}, {{120},{  7}}, {{  4},{  7}}, {{ 68},{  7}}, {{ 36},{  7}},
-{{100},{  7}}, {{ 20},{  7}}, {{ 84},{  7}}, {{ 52},{  7}}, {{116},{  7}},
-{{  3},{  8}}, {{131},{  8}}, {{ 67},{  8}}, {{195},{  8}}, {{ 35},{  8}},
-{{163},{  8}}, {{ 99},{  8}}, {{227},{  8}}
-};
-
-local const ct_data static_dtree[D_CODES] = {
-{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},
-{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},
-{{10},{ 5}}, {{26},{ 5}}, {{ 6},{ 5}}, {{22},{ 5}}, {{14},{ 5}},
-{{30},{ 5}}, {{ 1},{ 5}}, {{17},{ 5}}, {{ 9},{ 5}}, {{25},{ 5}},
-{{ 5},{ 5}}, {{21},{ 5}}, {{13},{ 5}}, {{29},{ 5}}, {{ 3},{ 5}},
-{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
-};
-
-const uch _dist_code[DIST_CODE_LEN] = {
- 0,  1,  2,  3,  4,  4,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  8,
- 8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,  9, 10, 10, 10, 10, 10, 10, 10, 10,
-10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
-11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
-12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13,
-13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
-13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15,
-15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,  0,  0, 16, 17,
-18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22,
-23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
-26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
-27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
-27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
-28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
-28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
-28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
-29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
-29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
-29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
-};
-
-const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {
- 0,  1,  2,  3,  4,  5,  6,  7,  8,  8,  9,  9, 10, 10, 11, 11, 12, 12, 12, 12,
-13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
-17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
-19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
-21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
-22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
-23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
-26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
-26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
-27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
-};
-
-local const int base_length[LENGTH_CODES] = {
-0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
-64, 80, 96, 112, 128, 160, 192, 224, 0
-};
-
-local const int base_dist[D_CODES] = {
-    0,     1,     2,     3,     4,     6,     8,    12,    16,    24,
-   32,    48,    64,    96,   128,   192,   256,   384,   512,   768,
- 1024,  1536,  2048,  3072,  4096,  6144,  8192, 12288, 16384, 24576
-};
-

sys/src/cmd/gs/zlib/uncompr.c

@@ -1,70 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id: uncompr.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-/* ===========================================================================
-     Decompresses the source buffer into the destination buffer.  sourceLen is
-   the byte length of the source buffer. Upon entry, destLen is the total
-   size of the destination buffer, which must be large enough to hold the
-   entire uncompressed data. (The size of the uncompressed data must have
-   been saved previously by the compressor and transmitted to the decompressor
-   by some mechanism outside the scope of this compression library.)
-   Upon exit, destLen is the actual size of the compressed buffer.
-     This function can be used to decompress a whole file at once if the
-   input file is mmap'ed.
-
-     uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
-   enough memory, Z_BUF_ERROR if there was not enough room in the output
-   buffer, or Z_DATA_ERROR if the input data was corrupted.
-*/
-int ZEXPORT uncompress (dest, destLen, source, sourceLen)
-    Bytef *dest;
-    uLongf *destLen;
-    const Bytef *source;
-    uLong sourceLen;
-{
-    z_stream stream;
-    int err;
-
-    stream.next_in = (Bytef*)source;
-    stream.avail_in = (uInt)sourceLen;
-    /* Check for source > 64K on 16-bit machine: */
-    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-
-    stream.next_out = dest;
-    stream.avail_out = (uInt)*destLen;
-    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
-
-    stream.zalloc = (alloc_func)0;
-    stream.zfree = (free_func)0;
-
-    err = inflateInit(&stream);
-    if (err != Z_OK) return err;
-
-    err = inflate(&stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        inflateEnd(&stream);
-        if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
-            return Z_DATA_ERROR;
-        return err;
-    }
-    *destLen = stream.total_out;
-
-    err = inflateEnd(&stream);
-    return err;
-}

sys/src/cmd/gs/zlib/zconf.h

@@ -1,335 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2004 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id: zconf.h,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
-
-#ifndef ZCONF_H
-#define ZCONF_H
-
-/*
- * If you *really* need a unique prefix for all types and library functions,
- * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
- */
-#ifdef Z_PREFIX
-#  define deflateInit_          z_deflateInit_
-#  define deflate               z_deflate
-#  define deflateEnd            z_deflateEnd
-#  define inflateInit_          z_inflateInit_
-#  define inflate               z_inflate
-#  define inflateEnd            z_inflateEnd
-#  define deflateInit2_         z_deflateInit2_
-#  define deflateSetDictionary  z_deflateSetDictionary
-#  define deflateCopy           z_deflateCopy
-#  define deflateReset          z_deflateReset
-#  define deflateParams         z_deflateParams
-#  define deflateBound          z_deflateBound
-#  define deflatePrime          z_deflatePrime
-#  define inflateInit2_         z_inflateInit2_
-#  define inflateSetDictionary  z_inflateSetDictionary
-#  define inflateSync           z_inflateSync
-#  define inflateSyncPoint      z_inflateSyncPoint
-#  define inflateCopy           z_inflateCopy
-#  define inflateReset          z_inflateReset
-#  define inflateBack           z_inflateBack
-#  define inflateBackEnd        z_inflateBackEnd
-#  define compress              z_compress
-#  define compress2             z_compress2
-#  define compressBound         z_compressBound
-#  define uncompress            z_uncompress
-#  define adler32               z_adler32
-#  define crc32                 z_crc32
-#  define get_crc_table         z_get_crc_table
-#  define zError                z_zError
-
-#  define Byte                  z_Byte
-#  define uInt                  z_uInt
-#  define uLong                 z_uLong
-#  define Bytef                 z_Bytef
-#  define charf                 z_charf
-#  define intf                  z_intf
-#  define uIntf                 z_uIntf
-#  define uLongf                z_uLongf
-#  define voidpf                z_voidpf
-#  define voidp                 z_voidp
-#endif
-
-#if defined(__MSDOS__) && !defined(MSDOS)
-#  define MSDOS
-#endif
-#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
-#  define OS2
-#endif
-#if defined(_WINDOWS) && !defined(WINDOWS)
-#  define WINDOWS
-#endif
-#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
-#  define WIN32
-#endif
-#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
-#  if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
-#    ifndef SYS16BIT
-#      define SYS16BIT
-#    endif
-#  endif
-#endif
-
-/*
- * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
- * than 64k bytes at a time (needed on systems with 16-bit int).
- */
-#ifdef SYS16BIT
-#  define MAXSEG_64K
-#endif
-#ifdef MSDOS
-#  define UNALIGNED_OK
-#endif
-
-#ifdef __STDC_VERSION__
-#  ifndef STDC
-#    define STDC
-#  endif
-#  if __STDC_VERSION__ >= 199901L
-#    ifndef STDC99
-#      define STDC99
-#    endif
-#  endif
-#endif
-#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
-#  define STDC
-#endif
-#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
-#  define STDC
-#endif
-#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
-#  define STDC
-#endif
-#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
-#  define STDC
-#endif
-
-#if defined(__OS400__) && !defined(STDC)    /* iSeries (formerly AS/400). */
-#  define STDC
-#endif
-
-#ifndef STDC
-#  ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
-#    define const       /* note: need a more gentle solution here */
-#  endif
-#endif
-
-/* Some Mac compilers merge all .h files incorrectly: */
-#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
-#  define NO_DUMMY_DECL
-#endif
-
-/* Maximum value for memLevel in deflateInit2 */
-#ifndef MAX_MEM_LEVEL
-#  ifdef MAXSEG_64K
-#    define MAX_MEM_LEVEL 8
-#  else
-#    define MAX_MEM_LEVEL 9
-#  endif
-#endif
-
-/* Maximum value for windowBits in deflateInit2 and inflateInit2.
- * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
- * created by gzip. (Files created by minigzip can still be extracted by
- * gzip.)
- */
-#ifndef MAX_WBITS
-#  define MAX_WBITS   15 /* 32K LZ77 window */
-#endif
-
-/* The memory requirements for deflate are (in bytes):
-            (1 << (windowBits+2)) +  (1 << (memLevel+9))
- that is: 128K for windowBits=15  +  128K for memLevel = 8  (default values)
- plus a few kilobytes for small objects. For example, if you want to reduce
- the default memory requirements from 256K to 128K, compile with
-     make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
- Of course this will generally degrade compression (there's no free lunch).
-
-   The memory requirements for inflate are (in bytes) 1 << windowBits
- that is, 32K for windowBits=15 (default value) plus a few kilobytes
- for small objects.
-*/
-
-                        /* Type declarations */
-
-#ifndef OF /* function prototypes */
-#  ifdef STDC
-#    define OF(args)  args
-#  else
-#    define OF(args)  ()
-#  endif
-#endif
-
-/* The following definitions for FAR are needed only for MSDOS mixed
- * model programming (small or medium model with some far allocations).
- * This was tested only with MSC; for other MSDOS compilers you may have
- * to define NO_MEMCPY in zutil.h.  If you don't need the mixed model,
- * just define FAR to be empty.
- */
-#ifdef SYS16BIT
-#  if defined(M_I86SM) || defined(M_I86MM)
-     /* MSC small or medium model */
-#    define SMALL_MEDIUM
-#    ifdef _MSC_VER
-#      define FAR _far
-#    else
-#      define FAR far
-#    endif
-#  endif
-#  if (defined(__SMALL__) || defined(__MEDIUM__))
-     /* Turbo C small or medium model */
-#    define SMALL_MEDIUM
-#    ifdef __BORLANDC__
-#      define FAR _far
-#    else
-#      define FAR far
-#    endif
-#  endif
-#endif
-
-#if defined(WINDOWS) || defined(WIN32)
-   /* If building or using zlib as a DLL, define ZLIB_DLL.
-    * This is not mandatory, but it offers a little performance increase.
-    */
-#  ifdef ZLIB_DLL
-#    if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
-#      ifdef ZLIB_INTERNAL
-#        define ZEXTERN extern __declspec(dllexport)
-#      else
-#        define ZEXTERN extern __declspec(dllimport)
-#      endif
-#    endif
-#  endif  /* ZLIB_DLL */
-   /* If building or using zlib with the WINAPI/WINAPIV calling convention,
-    * define ZLIB_WINAPI.
-    * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
-    */
-#  ifdef ZLIB_WINAPI
-#    ifdef FAR
-#      undef FAR
-#    endif
-#    include <windows.h>
-     /* No need for _export, use ZLIB.DEF instead. */
-     /* For complete Windows compatibility, use WINAPI, not __stdcall. */
-#    define ZEXPORT WINAPI
-#    ifdef WIN32
-#      define ZEXPORTVA WINAPIV
-#    else
-#      define ZEXPORTVA FAR CDECL
-#    endif
-#  endif
-#endif
-
-#if defined (__BEOS__)
-#  ifdef ZLIB_DLL
-#    ifdef ZLIB_INTERNAL
-#      define ZEXPORT   __declspec(dllexport)
-#      define ZEXPORTVA __declspec(dllexport)
-#    else
-#      define ZEXPORT   __declspec(dllimport)
-#      define ZEXPORTVA __declspec(dllimport)
-#    endif
-#  endif
-#endif
-
-#ifndef ZEXTERN
-#  define ZEXTERN extern
-#endif
-#ifndef ZEXPORT
-#  define ZEXPORT
-#endif
-#ifndef ZEXPORTVA
-#  define ZEXPORTVA
-#endif
-
-#ifndef FAR
-#  define FAR
-#endif
-
-#if !defined(__MACTYPES__)
-typedef unsigned char  Byte;  /* 8 bits */
-#endif
-typedef unsigned int   uInt;  /* 16 bits or more */
-typedef unsigned long  uLong; /* 32 bits or more */
-
-#ifdef SMALL_MEDIUM
-   /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
-#  define Bytef Byte FAR
-#else
-   typedef Byte  FAR Bytef;
-#endif
-typedef char  FAR charf;
-typedef int   FAR intf;
-typedef uInt  FAR uIntf;
-typedef uLong FAR uLongf;
-
-#ifdef STDC
-   typedef void const *voidpc;
-   typedef void FAR   *voidpf;
-   typedef void       *voidp;
-#else
-   typedef Byte const *voidpc;
-   typedef Byte FAR   *voidpf;
-   typedef Byte       *voidp;
-#endif
-
-#if 0           /* HAVE_UNISTD_H -- this line is updated by ./configure */
-#  include <sys/types.h> /* for off_t */
-#  include <unistd.h>    /* for SEEK_* and off_t */
-#  ifdef VMS
-#    include <unixio.h>   /* for off_t */
-#  endif
-#  define z_off_t off_t
-#endif
-#ifndef SEEK_SET
-#  define SEEK_SET        0       /* Seek from beginning of file.  */
-#  define SEEK_CUR        1       /* Seek from current position.  */
-#  define SEEK_END        2       /* Set file pointer to EOF plus "offset" */
-#endif
-#ifndef z_off_t
-#  define z_off_t long
-#endif
-
-#if defined(__OS400__)
-#  define NO_vsnprintf
-#endif
-
-#if defined(__MVS__)
-#  define NO_vsnprintf
-#  ifdef FAR
-#    undef FAR
-#  endif
-#endif
-
-/* MVS linker does not support external names larger than 8 bytes */
-#if defined(__MVS__)
-#   pragma map(deflateInit_,"DEIN")
-#   pragma map(deflateInit2_,"DEIN2")
-#   pragma map(deflateEnd,"DEEND")
-#   pragma map(deflateBound,"DEBND")
-#   pragma map(inflateInit_,"ININ")
-#   pragma map(inflateInit2_,"ININ2")
-#   pragma map(inflateEnd,"INEND")
-#   pragma map(inflateSync,"INSY")
-#   pragma map(inflateSetDictionary,"INSEDI")
-#   pragma map(compressBound,"CMBND")
-#   pragma map(inflate_table,"INTABL")
-#   pragma map(inflate_fast,"INFA")
-#   pragma map(inflate_copyright,"INCOPY")
-#endif
-
-#endif /* ZCONF_H */

sys/src/cmd/gs/zlib/zconf.in.h

@@ -1,335 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2004 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id: zconf.in.h,v 1.1.1.1 2005/04/24 21:39:37 giles Exp $ */
-
-#ifndef ZCONF_H
-#define ZCONF_H
-
-/*
- * If you *really* need a unique prefix for all types and library functions,
- * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
- */
-#ifdef Z_PREFIX
-#  define deflateInit_          z_deflateInit_
-#  define deflate               z_deflate
-#  define deflateEnd            z_deflateEnd
-#  define inflateInit_          z_inflateInit_
-#  define inflate               z_inflate
-#  define inflateEnd            z_inflateEnd
-#  define deflateInit2_         z_deflateInit2_
-#  define deflateSetDictionary  z_deflateSetDictionary
-#  define deflateCopy           z_deflateCopy
-#  define deflateReset          z_deflateReset
-#  define deflateParams         z_deflateParams
-#  define deflateBound          z_deflateBound
-#  define deflatePrime          z_deflatePrime
-#  define inflateInit2_         z_inflateInit2_
-#  define inflateSetDictionary  z_inflateSetDictionary
-#  define inflateSync           z_inflateSync
-#  define inflateSyncPoint      z_inflateSyncPoint
-#  define inflateCopy           z_inflateCopy
-#  define inflateReset          z_inflateReset
-#  define inflateBack           z_inflateBack
-#  define inflateBackEnd        z_inflateBackEnd
-#  define compress              z_compress
-#  define compress2             z_compress2
-#  define compressBound         z_compressBound
-#  define uncompress            z_uncompress
-#  define adler32               z_adler32
-#  define crc32                 z_crc32
-#  define get_crc_table         z_get_crc_table
-#  define zError                z_zError
-
-#  define Byte                  z_Byte
-#  define uInt                  z_uInt
-#  define uLong                 z_uLong
-#  define Bytef                 z_Bytef
-#  define charf                 z_charf
-#  define intf                  z_intf
-#  define uIntf                 z_uIntf
-#  define uLongf                z_uLongf
-#  define voidpf                z_voidpf
-#  define voidp                 z_voidp
-#endif
-
-#if defined(__MSDOS__) && !defined(MSDOS)
-#  define MSDOS
-#endif
-#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
-#  define OS2
-#endif
-#if defined(_WINDOWS) && !defined(WINDOWS)
-#  define WINDOWS
-#endif
-#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
-#  define WIN32
-#endif
-#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
-#  if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
-#    ifndef SYS16BIT
-#      define SYS16BIT
-#    endif
-#  endif
-#endif
-
-/*
- * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
- * than 64k bytes at a time (needed on systems with 16-bit int).
- */
-#ifdef SYS16BIT
-#  define MAXSEG_64K
-#endif
-#ifdef MSDOS
-#  define UNALIGNED_OK
-#endif
-
-#ifdef __STDC_VERSION__
-#  ifndef STDC
-#    define STDC
-#  endif
-#  if __STDC_VERSION__ >= 199901L
-#    ifndef STDC99
-#      define STDC99
-#    endif
-#  endif
-#endif
-#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
-#  define STDC
-#endif
-#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
-#  define STDC
-#endif
-#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
-#  define STDC
-#endif
-#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
-#  define STDC
-#endif
-
-#if defined(__OS400__) && !defined(STDC)    /* iSeries (formerly AS/400). */
-#  define STDC
-#endif
-
-#ifndef STDC
-#  ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
-#    define const       /* note: need a more gentle solution here */
-#  endif
-#endif
-
-/* Some Mac compilers merge all .h files incorrectly: */
-#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
-#  define NO_DUMMY_DECL
-#endif
-
-/* Maximum value for memLevel in deflateInit2 */
-#ifndef MAX_MEM_LEVEL
-#  ifdef MAXSEG_64K
-#    define MAX_MEM_LEVEL 8
-#  else
-#    define MAX_MEM_LEVEL 9
-#  endif
-#endif
-
-/* Maximum value for windowBits in deflateInit2 and inflateInit2.
- * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
- * created by gzip. (Files created by minigzip can still be extracted by
- * gzip.)
- */
-#ifndef MAX_WBITS
-#  define MAX_WBITS   15 /* 32K LZ77 window */
-#endif
-
-/* The memory requirements for deflate are (in bytes):
-            (1 << (windowBits+2)) +  (1 << (memLevel+9))
- that is: 128K for windowBits=15  +  128K for memLevel = 8  (default values)
- plus a few kilobytes for small objects. For example, if you want to reduce
- the default memory requirements from 256K to 128K, compile with
-     make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
- Of course this will generally degrade compression (there's no free lunch).
-
-   The memory requirements for inflate are (in bytes) 1 << windowBits
- that is, 32K for windowBits=15 (default value) plus a few kilobytes
- for small objects.
-*/
-
-                        /* Type declarations */
-
-#ifndef OF /* function prototypes */
-#  ifdef STDC
-#    define OF(args)  args
-#  else
-#    define OF(args)  ()
-#  endif
-#endif
-
-/* The following definitions for FAR are needed only for MSDOS mixed
- * model programming (small or medium model with some far allocations).
- * This was tested only with MSC; for other MSDOS compilers you may have
- * to define NO_MEMCPY in zutil.h.  If you don't need the mixed model,
- * just define FAR to be empty.
- */
-#ifdef SYS16BIT
-#  if defined(M_I86SM) || defined(M_I86MM)
-     /* MSC small or medium model */
-#    define SMALL_MEDIUM
-#    ifdef _MSC_VER
-#      define FAR _far
-#    else
-#      define FAR far
-#    endif
-#  endif
-#  if (defined(__SMALL__) || defined(__MEDIUM__))
-     /* Turbo C small or medium model */
-#    define SMALL_MEDIUM
-#    ifdef __BORLANDC__
-#      define FAR _far
-#    else
-#      define FAR far
-#    endif
-#  endif
-#endif
-
-#if defined(WINDOWS) || defined(WIN32)
-   /* If building or using zlib as a DLL, define ZLIB_DLL.
-    * This is not mandatory, but it offers a little performance increase.
-    */
-#  ifdef ZLIB_DLL
-#    if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
-#      ifdef ZLIB_INTERNAL
-#        define ZEXTERN extern __declspec(dllexport)
-#      else
-#        define ZEXTERN extern __declspec(dllimport)
-#      endif
-#    endif
-#  endif  /* ZLIB_DLL */
-   /* If building or using zlib with the WINAPI/WINAPIV calling convention,
-    * define ZLIB_WINAPI.
-    * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
-    */
-#  ifdef ZLIB_WINAPI
-#    ifdef FAR
-#      undef FAR
-#    endif
-#    include <windows.h>
-     /* No need for _export, use ZLIB.DEF instead. */
-     /* For complete Windows compatibility, use WINAPI, not __stdcall. */
-#    define ZEXPORT WINAPI
-#    ifdef WIN32
-#      define ZEXPORTVA WINAPIV
-#    else
-#      define ZEXPORTVA FAR CDECL
-#    endif
-#  endif
-#endif
-
-#if defined (__BEOS__)
-#  ifdef ZLIB_DLL
-#    ifdef ZLIB_INTERNAL
-#      define ZEXPORT   __declspec(dllexport)
-#      define ZEXPORTVA __declspec(dllexport)
-#    else
-#      define ZEXPORT   __declspec(dllimport)
-#      define ZEXPORTVA __declspec(dllimport)
-#    endif
-#  endif
-#endif
-
-#ifndef ZEXTERN
-#  define ZEXTERN extern
-#endif
-#ifndef ZEXPORT
-#  define ZEXPORT
-#endif
-#ifndef ZEXPORTVA
-#  define ZEXPORTVA
-#endif
-
-#ifndef FAR
-#  define FAR
-#endif
-
-#if !defined(__MACTYPES__)
-typedef unsigned char  Byte;  /* 8 bits */
-#endif
-typedef unsigned int   uInt;  /* 16 bits or more */
-typedef unsigned long  uLong; /* 32 bits or more */
-
-#ifdef SMALL_MEDIUM
-   /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
-#  define Bytef Byte FAR
-#else
-   typedef Byte  FAR Bytef;
-#endif
-typedef char  FAR charf;
-typedef int   FAR intf;
-typedef uInt  FAR uIntf;
-typedef uLong FAR uLongf;
-
-#ifdef STDC
-   typedef void const *voidpc;
-   typedef void FAR   *voidpf;
-   typedef void       *voidp;
-#else
-   typedef Byte const *voidpc;
-   typedef Byte FAR   *voidpf;
-   typedef Byte       *voidp;
-#endif
-
-#if 0           /* HAVE_UNISTD_H -- this line is updated by ./configure */
-#  include <sys/types.h> /* for off_t */
-#  include <unistd.h>    /* for SEEK_* and off_t */
-#  ifdef VMS
-#    include <unixio.h>   /* for off_t */
-#  endif
-#  define z_off_t off_t
-#endif
-#ifndef SEEK_SET
-#  define SEEK_SET        0       /* Seek from beginning of file.  */
-#  define SEEK_CUR        1       /* Seek from current position.  */
-#  define SEEK_END        2       /* Set file pointer to EOF plus "offset" */
-#endif
-#ifndef z_off_t
-#  define z_off_t long
-#endif
-
-#if defined(__OS400__)
-#  define NO_vsnprintf
-#endif
-
-#if defined(__MVS__)
-#  define NO_vsnprintf
-#  ifdef FAR
-#    undef FAR
-#  endif
-#endif
-
-/* MVS linker does not support external names larger than 8 bytes */
-#if defined(__MVS__)
-#   pragma map(deflateInit_,"DEIN")
-#   pragma map(deflateInit2_,"DEIN2")
-#   pragma map(deflateEnd,"DEEND")
-#   pragma map(deflateBound,"DEBND")
-#   pragma map(inflateInit_,"ININ")
-#   pragma map(inflateInit2_,"ININ2")
-#   pragma map(inflateEnd,"INEND")
-#   pragma map(inflateSync,"INSY")
-#   pragma map(inflateSetDictionary,"INSEDI")
-#   pragma map(compressBound,"CMBND")
-#   pragma map(inflate_table,"INTABL")
-#   pragma map(inflate_fast,"INFA")
-#   pragma map(inflate_copyright,"INCOPY")
-#endif
-
-#endif /* ZCONF_H */

sys/src/cmd/gs/zlib/zlib.3

@@ -1,159 +0,0 @@
-.TH ZLIB 3 "3 October 2004"
-.SH NAME
-zlib \- compression/decompression library
-.SH SYNOPSIS
-[see
-.I zlib.h
-for full description]
-.SH DESCRIPTION
-The
-.I zlib
-library is a general purpose data compression library.
-The code is thread safe.
-It provides in-memory compression and decompression functions,
-including integrity checks of the uncompressed data.
-This version of the library supports only one compression method (deflation)
-but other algorithms will be added later
-and will have the same stream interface.
-.LP
-Compression can be done in a single step if the buffers are large enough
-(for example if an input file is mmap'ed),
-or can be done by repeated calls of the compression function.
-In the latter case,
-the application must provide more input and/or consume the output
-(providing more output space) before each call.
-.LP
-The library also supports reading and writing files in
-.IR gzip (1)
-(.gz) format
-with an interface similar to that of stdio.
-.LP
-The library does not install any signal handler.
-The decoder checks the consistency of the compressed data,
-so the library should never crash even in case of corrupted input.
-.LP
-All functions of the compression library are documented in the file
-.IR zlib.h .
-The distribution source includes examples of use of the library
-in the files
-.I example.c
-and
-.IR minigzip.c .
-.LP
-Changes to this version are documented in the file
-.I ChangeLog
-that accompanies the source,
-and are concerned primarily with bug fixes and portability enhancements.
-.LP
-A Java implementation of
-.I zlib
-is available in the Java Development Kit 1.1:
-.IP
-http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
-.LP
-A Perl interface to
-.IR zlib ,
-written by Paul Marquess (pmqs@cpan.org),
-is available at CPAN (Comprehensive Perl Archive Network) sites,
-including:
-.IP
-http://www.cpan.org/modules/by-module/Compress/
-.LP
-A Python interface to
-.IR zlib ,
-written by A.M. Kuchling (amk@magnet.com),
-is available in Python 1.5 and later versions:
-.IP
-http://www.python.org/doc/lib/module-zlib.html
-.LP
-A
-.I zlib
-binding for
-.IR tcl (1),
-written by Andreas Kupries (a.kupries@westend.com),
-is availlable at:
-.IP
-http://www.westend.com/~kupries/doc/trf/man/man.html
-.LP
-An experimental package to read and write files in .zip format,
-written on top of
-.I zlib
-by Gilles Vollant (info@winimage.com),
-is available at:
-.IP
-http://www.winimage.com/zLibDll/unzip.html
-and also in the
-.I contrib/minizip
-directory of the main
-.I zlib
-web site.
-.SH "SEE ALSO"
-The
-.I zlib
-web site can be found at either of these locations:
-.IP
-http://www.zlib.org
-.br
-http://www.gzip.org/zlib/
-.LP
-The data format used by the zlib library is described by RFC
-(Request for Comments) 1950 to 1952 in the files:
-.IP
-http://www.ietf.org/rfc/rfc1950.txt (concerning zlib format)
-.br
-http://www.ietf.org/rfc/rfc1951.txt (concerning deflate format)
-.br
-http://www.ietf.org/rfc/rfc1952.txt (concerning gzip format)
-.LP
-These documents are also available in other formats from:
-.IP
-ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
-.LP
-Mark Nelson (markn@ieee.org) wrote an article about
-.I zlib
-for the Jan. 1997 issue of  Dr. Dobb's Journal;
-a copy of the article is available at:
-.IP
-http://dogma.net/markn/articles/zlibtool/zlibtool.htm
-.SH "REPORTING PROBLEMS"
-Before reporting a problem,
-please check the
-.I zlib
-web site to verify that you have the latest version of
-.IR zlib ;
-otherwise,
-obtain the latest version and see if the problem still exists.
-Please read the
-.I zlib
-FAQ at:
-.IP
-http://www.gzip.org/zlib/zlib_faq.html
-.LP
-before asking for help.
-Send questions and/or comments to zlib@gzip.org,
-or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
-.SH AUTHORS
-Version 1.2.2
-Copyright (C) 1995-2004 Jean-loup Gailly (jloup@gzip.org)
-and Mark Adler (madler@alumni.caltech.edu).
-.LP
-This software is provided "as-is,"
-without any express or implied warranty.
-In no event will the authors be held liable for any damages
-arising from the use of this software.
-See the distribution directory with respect to requirements
-governing redistribution.
-The deflate format used by
-.I zlib
-was defined by Phil Katz.
-The deflate and
-.I zlib
-specifications were written by L. Peter Deutsch.
-Thanks to all the people who reported problems and suggested various
-improvements in
-.IR zlib ;
-who are too numerous to cite here.
-.LP
-UNIX manual page by R. P. C. Rodgers,
-U.S. National Library of Medicine (rodgers@nlm.nih.gov).
-.\" end of man page

sys/src/cmd/gs/zlib/zutil.c

@@ -1,328 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id: zutil.c,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
-
-#include "zutil.h"
-
-#ifndef NO_DUMMY_DECL
-struct internal_state      {int dummy;}; /* for buggy compilers */
-#endif
-
-#ifndef STDC
-extern void exit OF((int));
-#endif
-
-const char * const z_errmsg[10] = {
-"need dictionary",     /* Z_NEED_DICT       2  */
-"stream end",          /* Z_STREAM_END      1  */
-"",                    /* Z_OK              0  */
-"file error",          /* Z_ERRNO         (-1) */
-"stream error",        /* Z_STREAM_ERROR  (-2) */
-"data error",          /* Z_DATA_ERROR    (-3) */
-"insufficient memory", /* Z_MEM_ERROR     (-4) */
-"buffer error",        /* Z_BUF_ERROR     (-5) */
-"incompatible version",/* Z_VERSION_ERROR (-6) */
-""};
-
-
-const char * ZEXPORT zlibVersion()
-{
-    return ZLIB_VERSION;
-}
-
-uLong ZEXPORT zlibCompileFlags()
-{
-    uLong flags;
-
-    flags = 0;
-    switch (sizeof(uInt)) {
-    case 2:     break;
-    case 4:     flags += 1;     break;
-    case 8:     flags += 2;     break;
-    default:    flags += 3;
-    }
-    switch (sizeof(uLong)) {
-    case 2:     break;
-    case 4:     flags += 1 << 2;        break;
-    case 8:     flags += 2 << 2;        break;
-    default:    flags += 3 << 2;
-    }
-    switch (sizeof(voidpf)) {
-    case 2:     break;
-    case 4:     flags += 1 << 4;        break;
-    case 8:     flags += 2 << 4;        break;
-    default:    flags += 3 << 4;
-    }
-    switch (sizeof(z_off_t)) {
-    case 2:     break;
-    case 4:     flags += 1 << 6;        break;
-    case 8:     flags += 2 << 6;        break;
-    default:    flags += 3 << 6;
-    }
-#ifdef DEBUG
-    flags += 1 << 8;
-#endif
-#if defined(ASMV) || defined(ASMINF)
-    flags += 1 << 9;
-#endif
-#ifdef ZLIB_WINAPI
-    flags += 1 << 10;
-#endif
-#ifdef BUILDFIXED
-    flags += 1 << 12;
-#endif
-#ifdef DYNAMIC_CRC_TABLE
-    flags += 1 << 13;
-#endif
-#ifdef NO_GZCOMPRESS
-    flags += 1 << 16;
-#endif
-#ifdef NO_GZIP
-    flags += 1 << 17;
-#endif
-#ifdef PKZIP_BUG_WORKAROUND
-    flags += 1 << 20;
-#endif
-#ifdef FASTEST
-    flags += 1 << 21;
-#endif
-#ifdef STDC
-#  ifdef NO_vsnprintf
-        flags += 1 << 25;
-#    ifdef HAS_vsprintf_void
-        flags += 1 << 26;
-#    endif
-#  else
-#    ifdef HAS_vsnprintf_void
-        flags += 1 << 26;
-#    endif
-#  endif
-#else
-        flags += 1 << 24;
-#  ifdef NO_snprintf
-        flags += 1 << 25;
-#    ifdef HAS_sprintf_void
-        flags += 1 << 26;
-#    endif
-#  else
-#    ifdef HAS_snprintf_void
-        flags += 1 << 26;
-#    endif
-#  endif
-#endif
-    return flags;
-}
-
-#ifdef DEBUG
-
-#  ifndef verbose
-#    define verbose 0
-#  endif
-int z_verbose = verbose;
-
-void z_error (m)
-    char *m;
-{
-    fprintf(stderr, "%s\n", m);
-    exit(1);
-}
-#endif
-
-/* exported to allow conversion of error code to string for compress() and
- * uncompress()
- */
-const char * ZEXPORT zError(err)
-    int err;
-{
-    return ERR_MSG(err);
-}
-
-#if defined(_WIN32_WCE)
-    /* does not exist on WCE */
-    int errno = 0;
-#endif
-
-#ifndef HAVE_MEMCPY
-
-void zmemcpy(dest, source, len)
-    Bytef* dest;
-    const Bytef* source;
-    uInt  len;
-{
-    if (len == 0) return;
-    do {
-        *dest++ = *source++; /* ??? to be unrolled */
-    } while (--len != 0);
-}
-
-int zmemcmp(s1, s2, len)
-    const Bytef* s1;
-    const Bytef* s2;
-    uInt  len;
-{
-    uInt j;
-
-    for (j = 0; j < len; j++) {
-        if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
-    }
-    return 0;
-}
-
-void zmemzero(dest, len)
-    Bytef* dest;
-    uInt  len;
-{
-    if (len == 0) return;
-    do {
-        *dest++ = 0;  /* ??? to be unrolled */
-    } while (--len != 0);
-}
-#endif
-
-
-#ifdef SYS16BIT
-
-#ifdef __TURBOC__
-/* Turbo C in 16-bit mode */
-
-#  define MY_ZCALLOC
-
-/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
- * and farmalloc(64K) returns a pointer with an offset of 8, so we
- * must fix the pointer. Warning: the pointer must be put back to its
- * original form in order to free it, use zcfree().
- */
-
-#define MAX_PTR 10
-/* 10*64K = 640K */
-
-local int next_ptr = 0;
-
-typedef struct ptr_table_s {
-    voidpf org_ptr;
-    voidpf new_ptr;
-} ptr_table;
-
-local ptr_table table[MAX_PTR];
-/* This table is used to remember the original form of pointers
- * to large buffers (64K). Such pointers are normalized with a zero offset.
- * Since MSDOS is not a preemptive multitasking OS, this table is not
- * protected from concurrent access. This hack doesn't work anyway on
- * a protected system like OS/2. Use Microsoft C instead.
- */
-
-voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
-{
-    voidpf buf = opaque; /* just to make some compilers happy */
-    ulg bsize = (ulg)items*size;
-
-    /* If we allocate less than 65520 bytes, we assume that farmalloc
-     * will return a usable pointer which doesn't have to be normalized.
-     */
-    if (bsize < 65520L) {
-        buf = farmalloc(bsize);
-        if (*(ush*)&buf != 0) return buf;
-    } else {
-        buf = farmalloc(bsize + 16L);
-    }
-    if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
-    table[next_ptr].org_ptr = buf;
-
-    /* Normalize the pointer to seg:0 */
-    *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
-    *(ush*)&buf = 0;
-    table[next_ptr++].new_ptr = buf;
-    return buf;
-}
-
-void  zcfree (voidpf opaque, voidpf ptr)
-{
-    int n;
-    if (*(ush*)&ptr != 0) { /* object < 64K */
-        farfree(ptr);
-        return;
-    }
-    /* Find the original pointer */
-    for (n = 0; n < next_ptr; n++) {
-        if (ptr != table[n].new_ptr) continue;
-
-        farfree(table[n].org_ptr);
-        while (++n < next_ptr) {
-            table[n-1] = table[n];
-        }
-        next_ptr--;
-        return;
-    }
-    ptr = opaque; /* just to make some compilers happy */
-    Assert(0, "zcfree: ptr not found");
-}
-
-#endif /* __TURBOC__ */
-
-
-#ifdef M_I86
-/* Microsoft C in 16-bit mode */
-
-#  define MY_ZCALLOC
-
-#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
-#  define _halloc  halloc
-#  define _hfree   hfree
-#endif
-
-voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
-{
-    if (opaque) opaque = 0; /* to make compiler happy */
-    return _halloc((int32_t)items, size);
-}
-
-void  zcfree (voidpf opaque, voidpf ptr)
-{
-    if (opaque) opaque = 0; /* to make compiler happy */
-    _hfree(ptr);
-}
-
-#endif /* M_I86 */
-
-#endif /* SYS16BIT */
-
-
-#ifndef MY_ZCALLOC /* Any system without a special alloc function */
-
-#ifndef STDC
-extern voidp  malloc OF((uInt size));
-extern voidp  calloc OF((uInt items, uInt size));
-extern void   free   OF((voidpf ptr));
-#endif
-
-voidpf zcalloc (opaque, items, size)
-    voidpf opaque;
-    unsigned items;
-    unsigned size;
-{
-    if (opaque) items += size - size; /* make compiler happy */
-    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
-                              (voidpf)calloc(items, size);
-}
-
-void  zcfree (opaque, ptr)
-    voidpf opaque;
-    voidpf ptr;
-{
-    free(ptr);
-    if (opaque) return; /* make compiler happy */
-}
-
-#endif /* MY_ZCALLOC */

sys/src/cmd/gs/zlib/zutil.h

@@ -1,272 +0,0 @@
-/*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
-
-/* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
-   part of the implementation of the compression library and is
-   subject to change. Applications should only use zlib.h.
- */
-
-/* @(#) $Id: zutil.h,v 1.1.1.1 2005/04/24 21:39:38 giles Exp $ */
-
-#ifndef ZUTIL_H
-#define ZUTIL_H
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-#ifdef STDC
-#  include <stddef.h>
-#  include <string.h>
-#  include <stdlib.h>
-#endif
-#ifdef NO_ERRNO_H
-    extern int errno;
-#else
-#   include <errno.h>
-#endif
-
-#ifndef local
-#  define local static
-#endif
-/* compile with -Dlocal if your debugger can't find static symbols */
-
-typedef unsigned char  uch;
-typedef uch FAR uchf;
-typedef unsigned short ush;
-typedef ush FAR ushf;
-typedef unsigned long  ulg;
-
-extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
-/* (size given to avoid silly warnings with Visual C++) */
-
-#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
-
-#define ERR_RETURN(strm,err) \
-  return (strm->msg = (char*)ERR_MSG(err), (err))
-/* To be used only when the state is known to be valid */
-
-        /* common constants */
-
-#ifndef DEF_WBITS
-#  define DEF_WBITS MAX_WBITS
-#endif
-/* default windowBits for decompression. MAX_WBITS is for compression only */
-
-#if MAX_MEM_LEVEL >= 8
-#  define DEF_MEM_LEVEL 8
-#else
-#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
-#endif
-/* default memLevel */
-
-#define STORED_BLOCK 0
-#define STATIC_TREES 1
-#define DYN_TREES    2
-/* The three kinds of block type */
-
-#define MIN_MATCH  3
-#define MAX_MATCH  258
-/* The minimum and maximum match lengths */
-
-#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
-
-        /* target dependencies */
-
-#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
-#  define OS_CODE  0x00
-#  if defined(__TURBOC__) || defined(__BORLANDC__)
-#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
-       /* Allow compilation with ANSI keywords only enabled */
-       void _Cdecl farfree( void *block );
-       void *_Cdecl farmalloc( unsigned long nbytes );
-#    else
-#      include <alloc.h>
-#    endif
-#  else /* MSC or DJGPP */
-#    include <malloc.h>
-#  endif
-#endif
-
-#ifdef AMIGA
-#  define OS_CODE  0x01
-#endif
-
-#if defined(VAXC) || defined(VMS)
-#  define OS_CODE  0x02
-#  define F_OPEN(name, mode) \
-     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
-#endif
-
-#if defined(ATARI) || defined(atarist)
-#  define OS_CODE  0x05
-#endif
-
-#ifdef OS2
-#  define OS_CODE  0x06
-#endif
-
-#if defined(MACOS) || defined(TARGET_OS_MAC)
-#  define OS_CODE  0x07
-#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
-#    include <unix.h> /* for fdopen */
-#  else
-#    ifndef fdopen
-#      define fdopen(fd,mode) NULL /* No fdopen() */
-#    endif
-#  endif
-#endif
-
-#ifdef TOPS20
-#  define OS_CODE  0x0a
-#endif
-
-#ifdef WIN32
-#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
-#    define OS_CODE  0x0b
-#  endif
-#endif
-
-#ifdef __50SERIES /* Prime/PRIMOS */
-#  define OS_CODE  0x0f
-#endif
-
-#if defined(_BEOS_) || defined(RISCOS)
-#  define fdopen(fd,mode) NULL /* No fdopen() */
-#endif
-
-#if (defined(_MSC_VER) && (_MSC_VER > 600))
-#  if defined(_WIN32_WCE)
-#    define fdopen(fd,mode) NULL /* No fdopen() */
-#    ifndef _PTRDIFF_T_DEFINED
-       typedef int ptrdiff_t;
-#      define _PTRDIFF_T_DEFINED
-#    endif
-#  else
-#    define fdopen(fd,type)  _fdopen(fd,type)
-#  endif
-#endif
-
-        /* common defaults */
-
-#ifndef OS_CODE
-#  define OS_CODE  0x03  /* assume Unix */
-#endif
-
-#ifndef F_OPEN
-#  define F_OPEN(name, mode) fopen((name), (mode))
-#endif
-
-         /* functions */
-
-#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
-#  ifndef HAVE_VSNPRINTF
-#    define HAVE_VSNPRINTF
-#  endif
-#endif
-#if defined(__CYGWIN__)
-#  ifndef HAVE_VSNPRINTF
-#    define HAVE_VSNPRINTF
-#  endif
-#endif
-#ifndef HAVE_VSNPRINTF
-#  ifdef MSDOS
-     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
-        but for now we just assume it doesn't. */
-#    define NO_vsnprintf
-#  endif
-#  ifdef __TURBOC__
-#    define NO_vsnprintf
-#  endif
-#  ifdef WIN32
-     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
-#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
-#      define vsnprintf _vsnprintf
-#    endif
-#  endif
-#  ifdef __SASC
-#    define NO_vsnprintf
-#  endif
-#endif
-#ifdef VMS
-#  define NO_vsnprintf
-#endif
-
-#ifdef HAVE_STRERROR
-#  ifndef VMS
-     extern char *strerror OF((int));
-#  endif
-#  define zstrerror(errnum) strerror(errnum)
-#else
-#  define zstrerror(errnum) ""
-#endif
-
-#if defined(pyr)
-#  define NO_MEMCPY
-#endif
-#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
- /* Use our own functions for small and medium model with MSC <= 5.0.
-  * You may have to use the same strategy for Borland C (untested).
-  * The __SC__ check is for Symantec.
-  */
-#  define NO_MEMCPY
-#endif
-#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
-#  define HAVE_MEMCPY
-#endif
-#ifdef HAVE_MEMCPY
-#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
-#    define zmemcpy _fmemcpy
-#    define zmemcmp _fmemcmp
-#    define zmemzero(dest, len) _fmemset(dest, 0, len)
-#  else
-#    define zmemcpy memcpy
-#    define zmemcmp memcmp
-#    define zmemzero(dest, len) memset(dest, 0, len)
-#  endif
-#else
-   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
-   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
-   extern void zmemzero OF((Bytef* dest, uInt len));
-#endif
-
-/* Diagnostic functions */
-#ifdef DEBUG
-#  include <stdio.h>
-   extern int z_verbose;
-   extern void z_error    OF((char *m));
-#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
-#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
-#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
-#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
-#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
-#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
-#else
-#  define Assert(cond,msg)
-#  define Trace(x)
-#  define Tracev(x)
-#  define Tracevv(x)
-#  define Tracec(c,x)
-#  define Tracecv(c,x)
-#endif
-
-
-voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
-void   zcfree  OF((voidpf opaque, voidpf ptr));
-
-#define ZALLOC(strm, items, size) \
-           (*((strm)->zalloc))((strm)->opaque, (items), (size))
-#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
-#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
-
-#endif /* ZUTIL_H */

sys/src/libz/patch/port-inflate.sed

@@ -1,2 +0,0 @@
-# avoid signed left shift
-s/-1L << 16/-1UL << 16/g