harvey/sys/src/cmd/gs/src/gxcllzw.c

/* Copyright (C) 1997 Aladdin Enterprises.  All rights reserved.
  
  This file is part of AFPL Ghostscript.
  
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  she says so in writing.  Refer to the Aladdin Free Public License (the
  "License") for full details.
  
  Every copy of AFPL Ghostscript must include a copy of the License, normally
  in a plain ASCII text file named PUBLIC.  The License grants you the right
  to copy, modify and redistribute AFPL Ghostscript, but only under certain
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  requires that the copyright notice and this notice be preserved on all
  copies.
*/

/*$Id: gxcllzw.c,v 1.2 2000/09/19 19:00:34 lpd Exp $ */
/* LZW filter initialization for RAM-based band lists */
#include "std.h"
#include "gstypes.h"
#include "gsmemory.h"
#include "gxclmem.h"
#include "slzwx.h"

private stream_LZW_state cl_LZWE_state;
private stream_LZW_state cl_LZWD_state;

/* Initialize the states to be copied. */
void
gs_cl_lzw_init(gs_memory_t * mem)
{
    s_LZW_set_defaults((stream_state *) & cl_LZWE_state);
    cl_LZWE_state.template = &s_LZWE_template;
    s_LZW_set_defaults((stream_state *) & cl_LZWD_state);
    cl_LZWD_state.template = &s_LZWD_template;
}

/* Return the prototypes for compressing/decompressing the band list. */
const stream_state *
clist_compressor_state(void *client_data)
{
    return (const stream_state *)&cl_LZWE_state;
}
const stream_state *
clist_decompressor_state(void *client_data)
{
    return (const stream_state *)&cl_LZWD_state;
}