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58 lines
2.6 KiB
58 lines
2.6 KiB
/* inftrees.h -- header to use inftrees.c |
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* Copyright (C) 1995-1998 Mark Adler |
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* For conditions of distribution and use, see copyright notice in zlib.h |
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*/ |
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/* WARNING: this file should *not* be used by applications. It is |
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part of the implementation of the compression library and is |
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subject to change. Applications should only use zlib.h. |
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*/ |
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/* Huffman code lookup table entry--this entry is four bytes for machines |
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that have 16-bit pointers (e.g. PC's in the small or medium model). */ |
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typedef struct inflate_huft_s FAR inflate_huft; |
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struct inflate_huft_s { |
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union { |
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struct { |
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Byte Exop; /* number of extra bits or operation */ |
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Byte Bits; /* number of bits in this code or subcode */ |
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} what; |
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uInt pad; /* pad structure to a power of 2 (4 bytes for */ |
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} word; /* 16-bit, 8 bytes for 32-bit int's) */ |
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uInt base; /* literal, length base, distance base, |
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or table offset */ |
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}; |
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/* Maximum size of dynamic tree. The maximum found in a long but non- |
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exhaustive search was 1004 huft structures (850 for length/literals |
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and 154 for distances, the latter actually the result of an |
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exhaustive search). The actual maximum is not known, but the |
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value below is more than safe. */ |
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#define MANY 1440 |
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extern int inflate_trees_bits OF(( |
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uIntf *, /* 19 code lengths */ |
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uIntf *, /* bits tree desired/actual depth */ |
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inflate_huft * FAR *, /* bits tree result */ |
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inflate_huft *, /* space for trees */ |
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z_streamp)); /* for messages */ |
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extern int inflate_trees_dynamic OF(( |
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uInt, /* number of literal/length codes */ |
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uInt, /* number of distance codes */ |
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uIntf *, /* that many (total) code lengths */ |
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uIntf *, /* literal desired/actual bit depth */ |
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uIntf *, /* distance desired/actual bit depth */ |
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inflate_huft * FAR *, /* literal/length tree result */ |
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inflate_huft * FAR *, /* distance tree result */ |
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inflate_huft *, /* space for trees */ |
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z_streamp)); /* for messages */ |
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extern int inflate_trees_fixed OF(( |
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uIntf *, /* literal desired/actual bit depth */ |
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uIntf *, /* distance desired/actual bit depth */ |
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inflate_huft * FAR *, /* literal/length tree result */ |
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inflate_huft * FAR *, /* distance tree result */ |
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z_streamp)); /* for memory allocation */
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