sl@0: /* maketree.c -- make inffixed.h table for decoding fixed codes
sl@0:  * Copyright (C) 1998 Mark Adler
sl@0:  * For conditions of distribution and use, see copyright notice in zlib.h 
sl@0:  */
sl@0: 
sl@0: /* WARNING: this file should *not* be used by applications. It is
sl@0:    part of the implementation of the compression library and is
sl@0:    subject to change. Applications should only use zlib.h.
sl@0:  */
sl@0: 
sl@0: /* This program is included in the distribution for completeness.
sl@0:    You do not need to compile or run this program since inffixed.h
sl@0:    is already included in the distribution.  To use this program
sl@0:    you need to compile zlib with BUILDFIXED defined and then compile
sl@0:    and link this program with the zlib library.  Then the output of
sl@0:    this program can be piped to inffixed.h. */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <stdlib.h>
sl@0: #include "zutil.h"
sl@0: #include "inftrees.h"
sl@0: 
sl@0: /* simplify the use of the inflate_huft type with some defines */
sl@0: #define exop word.what.Exop
sl@0: #define bits word.what.Bits
sl@0: 
sl@0: /* generate initialization table for an inflate_huft structure array */
sl@0: void maketree(uInt b, inflate_huft *t)
sl@0: {
sl@0:   int i, e;
sl@0: 
sl@0:   i = 0;
sl@0:   while (1)
sl@0:   {
sl@0:     e = t[i].exop;
sl@0:     if (e && (e & (16+64)) == 0)        /* table pointer */
sl@0:     {
sl@0:       fprintf(stderr, "maketree: cannot initialize sub-tables!\n");
sl@0:       exit(1);
sl@0:     }
sl@0:     if (i % 4 == 0)
sl@0:       printf("\n   ");
sl@0:     printf(" {{{%u,%u}},%u}", t[i].exop, t[i].bits, t[i].base);
sl@0:     if (++i == (1<<b))
sl@0:       break;
sl@0:     putchar(',');
sl@0:   }
sl@0:   puts("");
sl@0: }
sl@0: 
sl@0: /* create the fixed tables in C initialization syntax */
sl@0: void main(void)
sl@0: {
sl@0:   int r;
sl@0:   uInt bl, bd;
sl@0:   inflate_huft *tl, *td;
sl@0:   z_stream z;
sl@0: 
sl@0:   z.zalloc = zcalloc;
sl@0:   z.opaque = (voidpf)0;
sl@0:   z.zfree = zcfree;
sl@0:   r = inflate_trees_fixed(&bl, &bd, &tl, &td, &z);
sl@0:   if (r)
sl@0:   {
sl@0:     fprintf(stderr, "inflate_trees_fixed error %d\n", r);
sl@0:     return;
sl@0:   }
sl@0:   puts("/* inffixed.h -- table for decoding fixed codes");
sl@0:   puts(" * Generated automatically by the maketree.c program");
sl@0:   puts(" */");
sl@0:   puts("");
sl@0:   puts("/* WARNING: this file should *not* be used by applications. It is");
sl@0:   puts("   part of the implementation of the compression library and is");
sl@0:   puts("   subject to change. Applications should only use zlib.h.");
sl@0:   puts(" */");
sl@0:   puts("");
sl@0:   printf("local uInt fixed_bl = %d;\n", bl);
sl@0:   printf("local uInt fixed_bd = %d;\n", bd);
sl@0:   printf("local inflate_huft fixed_tl[] = {");
sl@0:   maketree(bl, tl);
sl@0:   puts("  };");
sl@0:   printf("local inflate_huft fixed_td[] = {");
sl@0:   maketree(bd, td);
sl@0:   puts("  };");
sl@0: }