misc/libfreetype/src/gzip/inftrees.h
author sheepluva
Fri, 21 Oct 2011 19:17:08 +0200
changeset 6171 8627698134b6
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permissions -rw-r--r--
fix layout of net page
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/* inftrees.h -- header to use inftrees.c
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 * Copyright (C) 1995-2002 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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#ifndef _INFTREES_H
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#define _INFTREES_H
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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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local  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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local  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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local  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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    const inflate_huft * FAR *, /* literal/length tree result */
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    const inflate_huft * FAR *, /* distance tree result */
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    z_streamp));                /* for memory allocation */
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#endif /* _INFTREES_H */