c62d2810 |
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 | } |