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See ChangeLog: Wed Jan 13 14:10:15 CET 1999 Werner Koch
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commit
e99e43cd53
32 changed files with 2085 additions and 823 deletions
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@ -1,5 +1,5 @@
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/* deflate.h -- internal compression state
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* Copyright (C) 1995-1996 Jean-loup Gailly
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* Copyright (C) 1995-1998 Jean-loup Gailly
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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@ -8,7 +8,7 @@
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subject to change. Applications should only use zlib.h.
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*/
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/* $Id$ */
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/* @(#) $Id$ */
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#ifndef _DEFLATE_H
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#define _DEFLATE_H
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@ -83,6 +83,7 @@ typedef struct internal_state {
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z_streamp strm; /* pointer back to this zlib stream */
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int status; /* as the name implies */
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Bytef *pending_buf; /* output still pending */
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ulg pending_buf_size; /* size of pending_buf */
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Bytef *pending_out; /* next pending byte to output to the stream */
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int pending; /* nb of bytes in the pending buffer */
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int noheader; /* suppress zlib header and adler32 */
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@ -229,12 +230,12 @@ typedef struct internal_state {
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ulg opt_len; /* bit length of current block with optimal trees */
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ulg static_len; /* bit length of current block with static trees */
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ulg compressed_len; /* total bit length of compressed file */
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uInt matches; /* number of string matches in current block */
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int last_eob_len; /* bit length of EOB code for last block */
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#ifdef DEBUG
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ulg bits_sent; /* bit length of the compressed data */
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ulg compressed_len; /* total bit length of compressed file mod 2^32 */
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ulg bits_sent; /* bit length of compressed data sent mod 2^32 */
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#endif
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ush bi_buf;
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@ -267,9 +268,51 @@ typedef struct internal_state {
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/* in trees.c */
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void _tr_init OF((deflate_state *s));
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int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
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ulg _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len,
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void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len,
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int eof));
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void _tr_align OF((deflate_state *s));
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void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
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int eof));
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#define d_code(dist) \
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((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
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/* Mapping from a distance to a distance code. dist is the distance - 1 and
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* must not have side effects. _dist_code[256] and _dist_code[257] are never
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* used.
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*/
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#ifndef DEBUG
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/* Inline versions of _tr_tally for speed: */
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#if defined(GEN_TREES_H) || !defined(STDC)
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extern uch _length_code[];
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extern uch _dist_code[];
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#else
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extern const uch _length_code[];
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extern const uch _dist_code[];
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#endif
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# define _tr_tally_lit(s, c, flush) \
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{ uch cc = (c); \
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s->d_buf[s->last_lit] = 0; \
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s->l_buf[s->last_lit++] = cc; \
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s->dyn_ltree[cc].Freq++; \
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flush = (s->last_lit == s->lit_bufsize-1); \
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}
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# define _tr_tally_dist(s, distance, length, flush) \
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{ uch len = (length); \
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ush dist = (distance); \
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s->d_buf[s->last_lit] = dist; \
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s->l_buf[s->last_lit++] = len; \
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dist--; \
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s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
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s->dyn_dtree[d_code(dist)].Freq++; \
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flush = (s->last_lit == s->lit_bufsize-1); \
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}
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#else
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# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
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# define _tr_tally_dist(s, distance, length, flush) \
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flush = _tr_tally(s, distance, length)
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#endif
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#endif
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