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comparison zlib/inftrees.h @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* inftrees.h -- header to use inftrees.c 1 /* inftrees.h -- header to use inftrees.c
2 * Copyright (C) 1995-2005 Mark Adler 2 * Copyright (C) 1995-2005, 2010 Mark Adler
3 * For conditions of distribution and use, see copyright notice in zlib.h 3 * For conditions of distribution and use, see copyright notice in zlib.h
4 */ 4 */
5 5
6 /* WARNING: this file should *not* be used by applications. It is 6 /* WARNING: this file should *not* be used by applications. It is
7 part of the implementation of the compression library and is 7 part of the implementation of the compression library and is
33 0001eeee - length or distance, eeee is the number of extra bits 33 0001eeee - length or distance, eeee is the number of extra bits
34 01100000 - end of block 34 01100000 - end of block
35 01000000 - invalid code 35 01000000 - invalid code
36 */ 36 */
37 37
38 /* Maximum size of dynamic tree. The maximum found in a long but non- 38 /* Maximum size of the dynamic table. The maximum number of code structures is
39 exhaustive search was 1444 code structures (852 for length/literals 39 1444, which is the sum of 852 for literal/length codes and 592 for distance
40 and 592 for distances, the latter actually the result of an 40 codes. These values were found by exhaustive searches using the program
41 exhaustive search). The true maximum is not known, but the value 41 examples/enough.c found in the zlib distribtution. The arguments to that
42 below is more than safe. */ 42 program are the number of symbols, the initial root table size, and the
43 #define ENOUGH 2048 43 maximum bit length of a code. "enough 286 9 15" for literal/length codes
44 #define MAXD 592 44 returns returns 852, and "enough 30 6 15" for distance codes returns 592.
45 The initial root table size (9 or 6) is found in the fifth argument of the
46 inflate_table() calls in inflate.c and infback.c. If the root table size is
47 changed, then these maximum sizes would be need to be recalculated and
48 updated. */
49 #define ENOUGH_LENS 852
50 #define ENOUGH_DISTS 592
51 #define ENOUGH (ENOUGH_LENS+ENOUGH_DISTS)
45 52
46 /* Type of code to build for inftable() */ 53 /* Type of code to build for inflate_table() */
47 typedef enum { 54 typedef enum {
48 CODES, 55 CODES,
49 LENS, 56 LENS,
50 DISTS 57 DISTS
51 } codetype; 58 } codetype;
52 59
53 extern int inflate_table OF((codetype type, unsigned short FAR *lens, 60 int ZLIB_INTERNAL inflate_table OF((codetype type, unsigned short FAR *lens,
54 unsigned codes, code FAR * FAR *table, 61 unsigned codes, code FAR * FAR *table,
55 unsigned FAR *bits, unsigned short FAR *work)); 62 unsigned FAR *bits, unsigned short FAR *work));