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85 lines
2.5 KiB
85 lines
2.5 KiB
/* maketree.c -- make inffixed.h table for decoding fixed codes |
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* Copyright (C) 1995-2002 Mark Adler |
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* For conditions of distribution and use, see copyright notice in zlib.h |
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*/ |
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/* WARNING: this file should *not* be used by applications. It is |
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part of the implementation of the compression library and is |
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subject to change. Applications should only use zlib.h. |
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*/ |
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/* This program is included in the distribution for completeness. |
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You do not need to compile or run this program since inffixed.h |
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is already included in the distribution. To use this program |
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you need to compile zlib with BUILDFIXED defined and then compile |
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and link this program with the zlib library. Then the output of |
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this program can be piped to inffixed.h. */ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "zutil.h" |
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#include "inftrees.h" |
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/* simplify the use of the inflate_huft type with some defines */ |
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#define exop word.what.Exop |
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#define bits word.what.Bits |
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/* generate initialization table for an inflate_huft structure array */ |
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void maketree(uInt b, inflate_huft *t) |
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{ |
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int i, e; |
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i = 0; |
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while (1) |
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{ |
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e = t[i].exop; |
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if (e && (e & (16+64)) == 0) /* table pointer */ |
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{ |
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fprintf(stderr, "maketree: cannot initialize sub-tables!\n"); |
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exit(1); |
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} |
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if (i % 4 == 0) |
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printf("\n "); |
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printf(" {{{%u,%u}},%u}", t[i].exop, t[i].bits, t[i].base); |
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if (++i == (1<<b)) |
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break; |
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putchar(','); |
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} |
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puts(""); |
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} |
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/* create the fixed tables in C initialization syntax */ |
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void main(void) |
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{ |
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int r; |
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uInt bl, bd; |
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inflate_huft *tl, *td; |
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z_stream z; |
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z.zalloc = zcalloc; |
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z.opaque = (voidpf)0; |
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z.zfree = zcfree; |
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r = inflate_trees_fixed(&bl, &bd, &tl, &td, &z); |
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if (r) |
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{ |
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fprintf(stderr, "inflate_trees_fixed error %d\n", r); |
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return; |
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} |
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puts("/* inffixed.h -- table for decoding fixed codes"); |
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puts(" * Generated automatically by the maketree.c program"); |
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puts(" */"); |
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puts(""); |
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puts("/* WARNING: this file should *not* be used by applications. It is"); |
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puts(" part of the implementation of the compression library and is"); |
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puts(" subject to change. Applications should only use zlib.h."); |
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puts(" */"); |
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puts(""); |
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printf("local uInt fixed_bl = %d;\n", bl); |
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printf("local uInt fixed_bd = %d;\n", bd); |
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printf("local inflate_huft fixed_tl[] = {"); |
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maketree(bl, tl); |
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puts(" };"); |
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printf("local inflate_huft fixed_td[] = {"); |
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maketree(bd, td); |
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puts(" };"); |
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}
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