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53 lines
842 B
C
53 lines
842 B
C
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/*
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* The Python Imaging Library.
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* $Id$
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*
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* declarations for the TIFF LZW decoder.
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*
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* Copyright (c) Fredrik Lundh 1995-96.
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*/
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/* Max size for LZW code words */
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#define LZWBITS 12
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#define LZWTABLE (1<<LZWBITS)
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#define LZWBUFFER (1<<LZWBITS)
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typedef struct {
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/* CONFIGURATION */
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/* Filter type */
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int filter;
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/* PRIVATE CONTEXT (set by decoder) */
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/* Input bit buffer */
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INT32 bitbuffer;
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int bitcount;
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/* Code buffer */
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int codesize;
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int codemask;
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/* Constant symbol codes */
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int clear, end;
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/* Symbol history */
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int lastcode;
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unsigned char lastdata;
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/* History buffer */
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int bufferindex;
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unsigned char buffer[LZWTABLE];
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/* Symbol table */
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unsigned INT16 link[LZWTABLE];
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unsigned char data[LZWTABLE];
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int next;
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} LZWSTATE;
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