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  1. /* zutil.h -- internal interface and configuration of the compression library
  2.  * Copyright (C) 1995-2002 Jean-loup Gailly.
  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. /* @(#) $Id$ */
  12.  
  13. #ifndef _Z_UTIL_H
  14. #define _Z_UTIL_H
  15.  
  16. #include "zlib.h"
  17.  
  18. #ifdef STDC
  19. #  include <stddef.h>
  20. #  include <string.h>
  21. #  include <stdlib.h>
  22. #endif
  23. #ifdef NO_ERRNO_H
  24.     extern int errno;
  25. #else
  26. #   include <errno.h>
  27. #endif
  28.  
  29. #ifndef local
  30. #  define local static
  31. #endif
  32. /* compile with -Dlocal if your debugger can't find static symbols */
  33.  
  34. typedef unsigned char  uch;
  35. typedef uch FAR uchf;
  36. typedef unsigned short ush;
  37. typedef ush FAR ushf;
  38. typedef unsigned long  ulg;
  39.  
  40.  
  41. #define ERR_RETURN(strm,err) \
  42.   return (strm->msg = (char*)ERR_MSG(err), (err))
  43. /* To be used only when the state is known to be valid */
  44.  
  45.         /* common constants */
  46.  
  47. #ifndef DEF_WBITS
  48. #  define DEF_WBITS MAX_WBITS
  49. #endif
  50. /* default windowBits for decompression. MAX_WBITS is for compression only */
  51.  
  52. #if MAX_MEM_LEVEL >= 8
  53. #  define DEF_MEM_LEVEL 8
  54. #else
  55. #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  56. #endif
  57. /* default memLevel */
  58.  
  59. #define STORED_BLOCK 0
  60. #define STATIC_TREES 1
  61. #define DYN_TREES    2
  62. /* The three kinds of block type */
  63.  
  64. #define MIN_MATCH  3
  65. #define MAX_MATCH  258
  66. /* The minimum and maximum match lengths */
  67.  
  68. #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  69.  
  70.         /* target dependencies */
  71.  
  72. #ifdef MSDOS
  73. #  define OS_CODE  0x00
  74. #  if defined(__TURBOC__) || defined(__BORLANDC__)
  75. #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  76.        /* Allow compilation with ANSI keywords only enabled */
  77.        void _Cdecl farfree( void *block );
  78.        void *_Cdecl farmalloc( unsigned long nbytes );
  79. #    else
  80. #     include <alloc.h>
  81. #    endif
  82. #  else /* MSC or DJGPP */
  83. #  endif
  84. #endif
  85.  
  86. #ifdef OS2
  87. #  define OS_CODE  0x06
  88. #endif
  89.  
  90. #ifdef WIN32 /* Window 95 & Windows NT */
  91. #  define OS_CODE  0x0b
  92. #endif
  93.  
  94. #if defined(VAXC) || defined(VMS)
  95. #  define OS_CODE  0x02
  96. #  define F_OPEN(name, mode) \
  97.      ft_fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
  98. #endif
  99.  
  100. #ifdef AMIGA
  101. #  define OS_CODE  0x01
  102. #endif
  103.  
  104. #if defined(ATARI) || defined(atarist)
  105. #  define OS_CODE  0x05
  106. #endif
  107.  
  108. #if defined(MACOS) || defined(TARGET_OS_MAC)
  109. #  define OS_CODE  0x07
  110. #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
  111. #    include <unix.h> /* for fdopen */
  112. #  else
  113. #    ifndef fdopen
  114. #      define fdopen(fd,mode) NULL /* No fdopen() */
  115. #    endif
  116. #  endif
  117. #endif
  118.  
  119. #ifdef __50SERIES /* Prime/PRIMOS */
  120. #  define OS_CODE  0x0F
  121. #endif
  122.  
  123. #ifdef TOPS20
  124. #  define OS_CODE  0x0a
  125. #endif
  126.  
  127. #if defined(_BEOS_) || defined(RISCOS)
  128. #  define fdopen(fd,mode) NULL /* No fdopen() */
  129. #endif
  130.  
  131. #if (defined(_MSC_VER) && (_MSC_VER > 600))
  132. #  define fdopen(fd,type)  _fdopen(fd,type)
  133. #endif
  134.  
  135.  
  136.         /* Common defaults */
  137.  
  138. #ifndef OS_CODE
  139. #  define OS_CODE  0x03  /* assume Unix */
  140. #endif
  141.  
  142. #ifndef F_OPEN
  143. #  define F_OPEN(name, mode) ft_fopen((name), (mode))
  144. #endif
  145.  
  146.          /* functions */
  147.  
  148. #ifdef HAVE_STRERROR
  149.    extern char *strerror OF((int));
  150. #  define zstrerror(errnum) strerror(errnum)
  151. #else
  152. #  define zstrerror(errnum) ""
  153. #endif
  154.  
  155. #if defined(pyr)
  156. #  define NO_MEMCPY
  157. #endif
  158. #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
  159.  /* Use our own functions for small and medium model with MSC <= 5.0.
  160.   * You may have to use the same strategy for Borland C (untested).
  161.   * The __SC__ check is for Symantec.
  162.   */
  163. #  define NO_MEMCPY
  164. #endif
  165. #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
  166. #  define HAVE_MEMCPY
  167. #endif
  168. #ifdef HAVE_MEMCPY
  169. #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
  170. #    define zmemcpy _fmemcpy
  171. #    define zmemcmp _fmemcmp
  172. #    define zmemzero(dest, len) _fmemset(dest, 0, len)
  173. #  else
  174. #    define zmemcpy ft_memcpy
  175. #    define zmemcmp ft_memcmp
  176. #    define zmemzero(dest, len) ft_memset(dest, 0, len)
  177. #  endif
  178. #else
  179.    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
  180.    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
  181.    extern void zmemzero OF((Bytef* dest, uInt len));
  182. #endif
  183.  
  184. /* Diagnostic functions */
  185. #ifdef DEBUG
  186. #  include <stdio.h>
  187.    extern int z_verbose;
  188.    extern void z_error    OF((char *m));
  189. #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
  190. #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
  191. #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
  192. #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
  193. #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
  194. #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
  195. #else
  196. #  define Assert(cond,msg)
  197. #  define Trace(x)
  198. #  define Tracev(x)
  199. #  define Tracevv(x)
  200. #  define Tracec(c,x)
  201. #  define Tracecv(c,x)
  202. #endif
  203.  
  204.  
  205. typedef uLong (*check_func) OF((uLong check, const Bytef *buf,
  206.                                 uInt len));
  207. local voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
  208. local void   zcfree  OF((voidpf opaque, voidpf ptr));
  209.  
  210. #define ZALLOC(strm, items, size) \
  211.            (*((strm)->zalloc))((strm)->opaque, (items), (size))
  212. #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
  213. #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
  214.  
  215. #endif /* _Z_UTIL_H */
  216.