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1 | /* maketree.c -- make inffixed.h table for decoding fixed codes | |
2 | * Copyright (C) 1995-2002 Mark Adler | |
3 | * For conditions of distribution and use, see copyright notice in zlib.h | |
4 | */ | |
5 | ||
6 | /* WARNING: this file should *not* be used by applications. It is | |
7 | part of the implementation of the compression library and is | |
8 | subject to change. Applications should only use zlib.h. | |
9 | */ | |
10 | ||
11 | /* This program is included in the distribution for completeness. | |
12 | You do not need to compile or run this program since inffixed.h | |
13 | is already included in the distribution. To use this program | |
14 | you need to compile zlib with BUILDFIXED defined and then compile | |
15 | and link this program with the zlib library. Then the output of | |
16 | this program can be piped to inffixed.h. */ | |
17 | ||
18 | #include <stdio.h> | |
19 | #include <stdlib.h> | |
20 | #include "zutil.h" | |
21 | #include "inftrees.h" | |
22 | ||
23 | /* simplify the use of the inflate_huft type with some defines */ | |
24 | #define exop word.what.Exop | |
25 | #define bits word.what.Bits | |
26 | ||
27 | /* generate initialization table for an inflate_huft structure array */ | |
28 | void maketree(uInt b, inflate_huft *t) | |
29 | { | |
30 | int i, e; | |
31 | ||
32 | i = 0; | |
33 | while (1) | |
34 | { | |
35 | e = t[i].exop; | |
36 | if (e && (e & (16+64)) == 0) /* table pointer */ | |
37 | { | |
38 | fprintf(stderr, "maketree: cannot initialize sub-tables!\n"); | |
39 | exit(1); | |
40 | } | |
41 | if (i % 4 == 0) | |
42 | printf("\n "); | |
43 | printf(" {{{%u,%u}},%u}", t[i].exop, t[i].bits, t[i].base); | |
44 | if (++i == (1<<b)) | |
45 | break; | |
46 | putchar(','); | |
47 | } | |
48 | puts(""); | |
49 | } | |
50 | ||
51 | /* create the fixed tables in C initialization syntax */ | |
52 | void main(void) | |
53 | { | |
54 | int r; | |
55 | uInt bl, bd; | |
56 | inflate_huft *tl, *td; | |
57 | z_stream z; | |
58 | ||
59 | z.zalloc = zcalloc; | |
60 | z.opaque = (voidpf)0; | |
61 | z.zfree = zcfree; | |
62 | r = inflate_trees_fixed(&bl, &bd, &tl, &td, &z); | |
63 | if (r) | |
64 | { | |
65 | fprintf(stderr, "inflate_trees_fixed error %d\n", r); | |
66 | return; | |
67 | } | |
68 | puts("/* inffixed.h -- table for decoding fixed codes"); | |
69 | puts(" * Generated automatically by the maketree.c program"); | |
70 | puts(" */"); | |
71 | puts(""); | |
72 | puts("/* WARNING: this file should *not* be used by applications. It is"); | |
73 | puts(" part of the implementation of the compression library and is"); | |
74 | puts(" subject to change. Applications should only use zlib.h."); | |
75 | puts(" */"); | |
76 | puts(""); | |
77 | printf("local uInt fixed_bl = %d;\n", bl); | |
78 | printf("local uInt fixed_bd = %d;\n", bd); | |
79 | printf("local inflate_huft fixed_tl[] = {"); | |
80 | maketree(bl, tl); | |
81 | puts(" };"); | |
82 | printf("local inflate_huft fixed_td[] = {"); | |
83 | maketree(bd, td); | |
84 | puts(" };"); | |
85 | } |