cpython-lru_cache-weakref: Modules/zlib/deflate.h annotate

annotate Modules/zlib/deflate.h @ 54294:dba767bc3155 legacy-trunk

remove mention of old ctypes version

author	Benjamin Peterson <benjamin@python.org>
date	Sat, 23 May 2009 20:59:09 +0000
parents	81fa47d2d477
children	bf94b6a73fc8 467019588fcc

rev	line source
36186 81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	1 /* deflate.h -- internal compression state
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	2 * Copyright (C) 1995-2004 Jean-loup Gailly
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	3 * For conditions of distribution and use, see copyright notice in zlib.h
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	4 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	5
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	6 /* WARNING: this file should not be used by applications. It is
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	7 part of the implementation of the compression library and is
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	8 subject to change. Applications should only use zlib.h.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	9 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	10
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	11 /* @(#) $Id$ */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	12
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	13 #ifndef DEFLATE_H
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	14 #define DEFLATE_H
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	15
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	16 #include "zutil.h"
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	17
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	18 /* define NO_GZIP when compiling if you want to disable gzip header and
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	19 trailer creation by deflate(). NO_GZIP would be used to avoid linking in
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	20 the crc code when it is not needed. For shared libraries, gzip encoding
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	21 should be left enabled. */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	22 #ifndef NO_GZIP
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	23 # define GZIP
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	24 #endif
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	25
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	26 /* ===========================================================================
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	27 * Internal compression state.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	28 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	29
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	30 #define LENGTH_CODES 29
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	31 /* number of length codes, not counting the special END_BLOCK code */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	32
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	33 #define LITERALS 256
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	34 /* number of literal bytes 0..255 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	35
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	36 #define L_CODES (LITERALS+1+LENGTH_CODES)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	37 /* number of Literal or Length codes, including the END_BLOCK code */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	38
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	39 #define D_CODES 30
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	40 /* number of distance codes */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	41
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	42 #define BL_CODES 19
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	43 /* number of codes used to transfer the bit lengths */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	44
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	45 #define HEAP_SIZE (2*L_CODES+1)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	46 /* maximum heap size */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	47
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	48 #define MAX_BITS 15
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	49 /* All codes must not exceed MAX_BITS bits */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	50
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	51 #define INIT_STATE 42
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	52 #define EXTRA_STATE 69
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	53 #define NAME_STATE 73
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	54 #define COMMENT_STATE 91
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	55 #define HCRC_STATE 103
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	56 #define BUSY_STATE 113
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	57 #define FINISH_STATE 666
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	58 /* Stream status */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	59
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	60
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	61 /* Data structure describing a single value and its code string. */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	62 typedef struct ct_data_s {
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	63 union {
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	64 ush freq; /* frequency count */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	65 ush code; /* bit string */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	66 } fc;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	67 union {
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	68 ush dad; /* father node in Huffman tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	69 ush len; /* length of bit string */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	70 } dl;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	71 } FAR ct_data;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	72
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	73 #define Freq fc.freq
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	74 #define Code fc.code
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	75 #define Dad dl.dad
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	76 #define Len dl.len
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	77
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	78 typedef struct static_tree_desc_s static_tree_desc;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	79
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	80 typedef struct tree_desc_s {
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	81 ct_data dyn_tree; / the dynamic tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	82 int max_code; /* largest code with non zero frequency */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	83 static_tree_desc stat_desc; / the corresponding static tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	84 } FAR tree_desc;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	85
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	86 typedef ush Pos;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	87 typedef Pos FAR Posf;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	88 typedef unsigned IPos;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	89
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	90 /* A Pos is an index in the character window. We use short instead of int to
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	91 * save space in the various tables. IPos is used only for parameter passing.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	92 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	93
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	94 typedef struct internal_state {
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	95 z_streamp strm; /* pointer back to this zlib stream */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	96 int status; /* as the name implies */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	97 Bytef pending_buf; / output still pending */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	98 ulg pending_buf_size; /* size of pending_buf */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	99 Bytef pending_out; / next pending byte to output to the stream */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	100 uInt pending; /* nb of bytes in the pending buffer */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	101 int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	102 gz_headerp gzhead; /* gzip header information to write */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	103 uInt gzindex; /* where in extra, name, or comment */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	104 Byte method; /* STORED (for zip only) or DEFLATED */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	105 int last_flush; /* value of flush param for previous deflate call */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	106
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	107 /* used by deflate.c: */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	108
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	109 uInt w_size; /* LZ77 window size (32K by default) */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	110 uInt w_bits; /* log2(w_size) (8..16) */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	111 uInt w_mask; /* w_size - 1 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	112
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	113 Bytef *window;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	114 /* Sliding window. Input bytes are read into the second half of the window,
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	115 * and move to the first half later to keep a dictionary of at least wSize
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	116 * bytes. With this organization, matches are limited to a distance of
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	117 * wSize-MAX_MATCH bytes, but this ensures that IO is always
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	118 * performed with a length multiple of the block size. Also, it limits
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	119 * the window size to 64K, which is quite useful on MSDOS.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	120 * To do: use the user input buffer as sliding window.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	121 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	122
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	123 ulg window_size;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	124 /* Actual size of window: 2*wSize, except when the user input buffer
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	125 * is directly used as sliding window.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	126 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	127
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	128 Posf *prev;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	129 /* Link to older string with same hash index. To limit the size of this
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	130 * array to 64K, this link is maintained only for the last 32K strings.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	131 * An index in this array is thus a window index modulo 32K.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	132 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	133
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	134 Posf head; / Heads of the hash chains or NIL. */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	135
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	136 uInt ins_h; /* hash index of string to be inserted */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	137 uInt hash_size; /* number of elements in hash table */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	138 uInt hash_bits; /* log2(hash_size) */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	139 uInt hash_mask; /* hash_size-1 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	140
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	141 uInt hash_shift;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	142 /* Number of bits by which ins_h must be shifted at each input
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	143 * step. It must be such that after MIN_MATCH steps, the oldest
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	144 * byte no longer takes part in the hash key, that is:
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	145 * hash_shift * MIN_MATCH >= hash_bits
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	146 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	147
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	148 long block_start;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	149 /* Window position at the beginning of the current output block. Gets
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	150 * negative when the window is moved backwards.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	151 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	152
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	153 uInt match_length; /* length of best match */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	154 IPos prev_match; /* previous match */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	155 int match_available; /* set if previous match exists */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	156 uInt strstart; /* start of string to insert */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	157 uInt match_start; /* start of matching string */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	158 uInt lookahead; /* number of valid bytes ahead in window */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	159
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	160 uInt prev_length;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	161 /* Length of the best match at previous step. Matches not greater than this
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	162 * are discarded. This is used in the lazy match evaluation.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	163 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	164
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	165 uInt max_chain_length;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	166 /* To speed up deflation, hash chains are never searched beyond this
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	167 * length. A higher limit improves compression ratio but degrades the
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	168 * speed.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	169 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	170
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	171 uInt max_lazy_match;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	172 /* Attempt to find a better match only when the current match is strictly
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	173 * smaller than this value. This mechanism is used only for compression
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	174 * levels >= 4.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	175 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	176 # define max_insert_length max_lazy_match
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	177 /* Insert new strings in the hash table only if the match length is not
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	178 * greater than this length. This saves time but degrades compression.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	179 * max_insert_length is used only for compression levels <= 3.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	180 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	181
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	182 int level; /* compression level (1..9) */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	183 int strategy; /* favor or force Huffman coding*/
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	184
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	185 uInt good_match;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	186 /* Use a faster search when the previous match is longer than this */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	187
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	188 int nice_match; /* Stop searching when current match exceeds this */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	189
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	190 /* used by trees.c: */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	191 /* Didn't use ct_data typedef below to supress compiler warning */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	192 struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	193 struct ct_data_s dyn_dtree[2D_CODES+1]; / distance tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	194 struct ct_data_s bl_tree[2BL_CODES+1]; / Huffman tree for bit lengths */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	195
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	196 struct tree_desc_s l_desc; /* desc. for literal tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	197 struct tree_desc_s d_desc; /* desc. for distance tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	198 struct tree_desc_s bl_desc; /* desc. for bit length tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	199
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	200 ush bl_count[MAX_BITS+1];
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	201 /* number of codes at each bit length for an optimal tree */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	202
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	203 int heap[2L_CODES+1]; / heap used to build the Huffman trees */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	204 int heap_len; /* number of elements in the heap */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	205 int heap_max; /* element of largest frequency */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	206 /* The sons of heap[n] are heap[2n] and heap[2n+1]. heap[0] is not used.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	207 * The same heap array is used to build all trees.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	208 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	209
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	210 uch depth[2*L_CODES+1];
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	211 /* Depth of each subtree used as tie breaker for trees of equal frequency
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	212 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	213
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	214 uchf l_buf; / buffer for literals or lengths */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	215
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	216 uInt lit_bufsize;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	217 /* Size of match buffer for literals/lengths. There are 4 reasons for
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	218 * limiting lit_bufsize to 64K:
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	219 * - frequencies can be kept in 16 bit counters
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	220 * - if compression is not successful for the first block, all input
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	221 * data is still in the window so we can still emit a stored block even
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	222 * when input comes from standard input. (This can also be done for
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	223 * all blocks if lit_bufsize is not greater than 32K.)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	224 * - if compression is not successful for a file smaller than 64K, we can
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	225 * even emit a stored file instead of a stored block (saving 5 bytes).
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	226 * This is applicable only for zip (not gzip or zlib).
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	227 * - creating new Huffman trees less frequently may not provide fast
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	228 * adaptation to changes in the input data statistics. (Take for
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	229 * example a binary file with poorly compressible code followed by
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	230 * a highly compressible string table.) Smaller buffer sizes give
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	231 * fast adaptation but have of course the overhead of transmitting
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	232 * trees more frequently.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	233 * - I can't count above 4
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	234 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	235
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	236 uInt last_lit; /* running index in l_buf */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	237
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	238 ushf *d_buf;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	239 /* Buffer for distances. To simplify the code, d_buf and l_buf have
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	240 * the same number of elements. To use different lengths, an extra flag
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	241 * array would be necessary.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	242 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	243
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	244 ulg opt_len; /* bit length of current block with optimal trees */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	245 ulg static_len; /* bit length of current block with static trees */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	246 uInt matches; /* number of string matches in current block */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	247 int last_eob_len; /* bit length of EOB code for last block */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	248
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	249 #ifdef DEBUG
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	250 ulg compressed_len; /* total bit length of compressed file mod 2^32 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	251 ulg bits_sent; /* bit length of compressed data sent mod 2^32 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	252 #endif
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	253
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	254 ush bi_buf;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	255 /* Output buffer. bits are inserted starting at the bottom (least
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	256 * significant bits).
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	257 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	258 int bi_valid;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	259 /* Number of valid bits in bi_buf. All bits above the last valid bit
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	260 * are always zero.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	261 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	262
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	263 } FAR deflate_state;
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	264
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	265 /* Output a byte on the stream.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	266 * IN assertion: there is enough room in pending_buf.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	267 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	268 #define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	269
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	270
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	271 #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	272 /* Minimum amount of lookahead, except at the end of the input file.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	273 * See deflate.c for comments about the MIN_MATCH+1.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	274 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	275
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	276 #define MAX_DIST(s) ((s)->w_size-MIN_LOOKAHEAD)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	277 /* In order to simplify the code, particularly on 16 bit machines, match
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	278 * distances are limited to MAX_DIST instead of WSIZE.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	279 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	280
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	281 /* in trees.c */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	282 void _tr_init OF((deflate_state *s));
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	283 int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	284 void _tr_flush_block OF((deflate_state s, charf buf, ulg stored_len,
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	285 int eof));
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	286 void _tr_align OF((deflate_state *s));
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	287 void _tr_stored_block OF((deflate_state s, charf buf, ulg stored_len,
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	288 int eof));
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	289
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	290 #define d_code(dist) \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	291 ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	292 /* Mapping from a distance to a distance code. dist is the distance - 1 and
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	293 * must not have side effects. _dist_code[256] and _dist_code[257] are never
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	294 * used.
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	295 */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	296
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	297 #ifndef DEBUG
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	298 /* Inline versions of _tr_tally for speed: */
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	299
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	300 #if defined(GEN_TREES_H) \|\| !defined(STDC)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	301 extern uch _length_code[];
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	302 extern uch _dist_code[];
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	303 #else
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	304 extern const uch _length_code[];
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	305 extern const uch _dist_code[];
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	306 #endif
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	307
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	308 # define _tr_tally_lit(s, c, flush) \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	309 { uch cc = (c); \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	310 s->d_buf[s->last_lit] = 0; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	311 s->l_buf[s->last_lit++] = cc; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	312 s->dyn_ltree[cc].Freq++; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	313 flush = (s->last_lit == s->lit_bufsize-1); \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	314 }
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	315 # define _tr_tally_dist(s, distance, length, flush) \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	316 { uch len = (length); \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	317 ush dist = (distance); \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	318 s->d_buf[s->last_lit] = dist; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	319 s->l_buf[s->last_lit++] = len; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	320 dist--; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	321 s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	322 s->dyn_dtree[d_code(dist)].Freq++; \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	323 flush = (s->last_lit == s->lit_bufsize-1); \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	324 }
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	325 #else
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	326 # define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	327 # define _tr_tally_dist(s, distance, length, flush) \
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	328 flush = _tr_tally(s, distance, length)
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	329 #endif
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	330
81fa47d2d477 Import zlib into Python tree. Martin v. Löwis <martin@v.loewis.de> parents: diff changeset	331 #endif /* DEFLATE_H */

Mercurial > cpython-lru_cache-weakref

annotate Modules/zlib/deflate.h @ 54294:dba767bc3155 legacy-trunk