| /* inftrees.h -- header to use inftrees.c |
| * Copyright (C) 1995-1996 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). */ |
| |
| typedef struct inflate_huft_s FAR inflate_huft; |
| |
| 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; |
| Bytef *pad; /* pad structure to a power of 2 (4 bytes for */ |
| } word; /* 16-bit, 8 bytes for 32-bit machines) */ |
| union { |
| uInt Base; /* literal, length base, or distance base */ |
| inflate_huft *Next; /* pointer to next level of table */ |
| } more; |
| }; |
| |
| #ifdef DEBUG |
| extern uInt inflate_hufts; |
| #endif |
| |
| extern int inflate_trees_bits OF(( |
| uIntf *, /* 19 code lengths */ |
| uIntf *, /* bits tree desired/actual depth */ |
| inflate_huft * FAR *, /* bits tree result */ |
| z_streamp )); /* for zalloc, zfree functions */ |
| |
| extern 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 */ |
| z_streamp )); /* for zalloc, zfree functions */ |
| |
| extern int inflate_trees_fixed OF(( |
| 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 */ |
| |
| extern int inflate_trees_free OF(( |
| inflate_huft *, /* tables to free */ |
| z_streamp )); /* for zfree function */ |
| |