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- #ifdef PLAN9
- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- #else
- #include <stdio.h>
- #include <unistd.h>
- #include "plan9.h"
- #endif
- #include "hdr.h"
- #include "conv.h"
- #include "ksc.h"
- /*
- contributed by kuro@vodka.Eng.Sun.COM (Teruhiko Kurosaka)
- */
- /*
- a state machine for interpreting shift-ksc.
- */
- #define SS2 0x8e
- #define SS3 0x8f
- /*
- * Convert EUC in Koran locale to Unicode.
- * Only codeset 0 and 1 are used.
- */
- void
- ukscproc(int c, Rune **r, long input_loc)
- {
- static enum { init, cs1last /*, cs2, cs3first, cs3last*/} state = init;
- static int korean646 = 1; /* fixed to 1 for now. */
- static int lastc;
- int n;
- long l;
- switch(state)
- {
- case init:
- if (c < 0){
- return;
- }else if (c < 128){
- if(korean646 && (c=='\\')){
- emit(0x20A9);
- } else {
- emit(c);
- }
- /* }else if (c==SS2){
- state = cs2;
- }else if (c==SS3){
- state = cs3first;
- */ }else{
- lastc = c;
- state = cs1last;
- }
- return;
- case cs1last: /* 2nd byte of codeset 1 (KSC 5601) */
- if(c < 0){
- if(squawk)
- EPR "%s: unexpected EOF in %s\n", argv0, file);
- c = 0x21 | (lastc&0x80);
- }
- n = ((lastc&0x7f)-33)*94 + (c&0x7f)-33;
- if((n >= ksc5601max) || ((l = tabksc5601[n]) < 0)){
- nerrors++;
- if(squawk)
- EPR "%s: unknown ksc5601 %d (from 0x%x,0x%x) near byte %ld in %s\n", argv0, n, lastc, c, input_loc, file);
- if(!clean)
- emit(BADMAP);
- } else {
- emit(l);
- }
- state = init;
- return;
- default:
- if(squawk)
- EPR "%s: ukscproc: unknown state %d\n",
- argv0, init);
- }
- }
- void
- uksc_in(int fd, long *notused, struct convert *out)
- {
- Rune ob[N];
- Rune *r, *re;
- uchar ibuf[N];
- int n, i;
- long nin;
- USED(notused);
- r = ob;
- re = ob+N-3;
- nin = 0;
- while((n = read(fd, ibuf, sizeof ibuf)) > 0){
- for(i = 0; i < n; i++){
- ukscproc(ibuf[i], &r, nin++);
- if(r >= re){
- OUT(out, ob, r-ob);
- r = ob;
- }
- }
- if(r > ob){
- OUT(out, ob, r-ob);
- r = ob;
- }
- }
- ukscproc(-1, &r, nin);
- if(r > ob)
- OUT(out, ob, r-ob);
- OUT(out, ob, 0);
- }
- void
- uksc_out(Rune *base, int n, long *notused)
- {
- char *p;
- int i;
- Rune r;
- long l;
- static int first = 1;
- USED(notused);
- if(first){
- first = 0;
- for(i = 0; i < NRUNE; i++)
- tab[i] = -1;
- for(i = 0; i < ksc5601max; i++)
- if((l = tabksc5601[i]) != -1){
- if(l < 0)
- tab[-l] = i;
- else
- tab[l] = i;
- }
- }
- nrunes += n;
- p = obuf;
- for(i = 0; i < n; i++){
- r = base[i];
- if(r < 128)
- *p++ = r;
- else {
- if(tab[r] != -1){
- *p++ = 0x80 | (tab[r]/94 + 0x21);
- *p++ = 0x80 | (tab[r]%94 + 0x21);
- continue;
- }
- if(squawk)
- EPR "%s: rune 0x%x not in output cs\n", argv0, r);
- nerrors++;
- if(clean)
- continue;
- *p++ = BYTEBADMAP;
- }
- }
- noutput += p-obuf;
- if(p > obuf)
- write(1, obuf, p-obuf);
- }
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