0,0 → 1,63 |
/* inftrees.h -- header to use inftrees.c |
* Copyright (C) 1995-2002 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. |
*/ |
|
/* Huffman code lookup table entry--this entry is four bytes for machines |
that have 16-bit pointers (e.g. PC's in the small or medium model). */ |
|
#ifndef _INFTREES_H |
#define _INFTREES_H |
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typedef struct inflate_huft_s FAR inflate_huft; |
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struct inflate_huft_s { |
union { |
struct { |
Byte Exop; /* number of extra bits or operation */ |
Byte Bits; /* number of bits in this code or subcode */ |
} what; |
uInt pad; /* pad structure to a power of 2 (4 bytes for */ |
} word; /* 16-bit, 8 bytes for 32-bit int's) */ |
uInt base; /* literal, length base, distance base, |
or table offset */ |
}; |
|
/* Maximum size of dynamic tree. The maximum found in a long but non- |
exhaustive search was 1004 huft structures (850 for length/literals |
and 154 for distances, the latter actually the result of an |
exhaustive search). The actual maximum is not known, but the |
value below is more than safe. */ |
#define MANY 1440 |
|
local int inflate_trees_bits OF(( |
uIntf *, /* 19 code lengths */ |
uIntf *, /* bits tree desired/actual depth */ |
inflate_huft * FAR *, /* bits tree result */ |
inflate_huft *, /* space for trees */ |
z_streamp)); /* for messages */ |
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local int inflate_trees_dynamic OF(( |
uInt, /* number of literal/length codes */ |
uInt, /* number of distance codes */ |
uIntf *, /* that many (total) code lengths */ |
uIntf *, /* literal desired/actual bit depth */ |
uIntf *, /* distance desired/actual bit depth */ |
inflate_huft * FAR *, /* literal/length tree result */ |
inflate_huft * FAR *, /* distance tree result */ |
inflate_huft *, /* space for trees */ |
z_streamp)); /* for messages */ |
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local int inflate_trees_fixed OF(( |
uIntf *, /* literal desired/actual bit depth */ |
uIntf *, /* distance desired/actual bit depth */ |
const inflate_huft * FAR *, /* literal/length tree result */ |
const inflate_huft * FAR *, /* distance tree result */ |
z_streamp)); /* for memory allocation */ |
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#endif /* _INFTREES_H */ |