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  1. /* zutil.h -- internal interface and configuration of the compression library
  2.  * Copyright (C) 1995-2013 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 ZUTIL_H
  14. #define ZUTIL_H
  15.  
  16. #ifdef HAVE_HIDDEN
  17. #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
  18. #else
  19. #  define ZLIB_INTERNAL
  20. #endif
  21.  
  22. #include "zlib.h"
  23.  
  24. #if defined(STDC) && !defined(Z_SOLO)
  25. #  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
  26. #    include <stddef.h>
  27. #  endif
  28. #  include <string.h>
  29. #  include <stdlib.h>
  30. #endif
  31.  
  32. #ifdef Z_SOLO
  33.    typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
  34. #endif
  35.  
  36. #ifndef local
  37. #  define local static
  38. #endif
  39. /* compile with -Dlocal if your debugger can't find static symbols */
  40.  
  41. typedef unsigned char  uch;
  42. typedef uch FAR uchf;
  43. typedef unsigned short ush;
  44. typedef ush FAR ushf;
  45. typedef unsigned long  ulg;
  46.  
  47. extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  48. /* (size given to avoid silly warnings with Visual C++) */
  49.  
  50. #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  51.  
  52. #define ERR_RETURN(strm,err) \
  53.   return (strm->msg = ERR_MSG(err), (err))
  54. /* To be used only when the state is known to be valid */
  55.  
  56.         /* common constants */
  57.  
  58. #ifndef DEF_WBITS
  59. #  define DEF_WBITS MAX_WBITS
  60. #endif
  61. /* default windowBits for decompression. MAX_WBITS is for compression only */
  62.  
  63. #if MAX_MEM_LEVEL >= 8
  64. #  define DEF_MEM_LEVEL 8
  65. #else
  66. #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  67. #endif
  68. /* default memLevel */
  69.  
  70. #define STORED_BLOCK 0
  71. #define STATIC_TREES 1
  72. #define DYN_TREES    2
  73. /* The three kinds of block type */
  74.  
  75. #define MIN_MATCH  3
  76. #define MAX_MATCH  258
  77. /* The minimum and maximum match lengths */
  78.  
  79. #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  80.  
  81.         /* target dependencies */
  82.  
  83. #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  84. #  define OS_CODE  0x00
  85. #  ifndef Z_SOLO
  86. #    if defined(__TURBOC__) || defined(__BORLANDC__)
  87. #      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  88.          /* Allow compilation with ANSI keywords only enabled */
  89.          void _Cdecl farfree( void *block );
  90.          void *_Cdecl farmalloc( unsigned long nbytes );
  91. #      else
  92. #        include <alloc.h>
  93. #      endif
  94. #    else /* MSC or DJGPP */
  95. #      include <malloc.h>
  96. #    endif
  97. #  endif
  98. #endif
  99.  
  100. #ifdef AMIGA
  101. #  define OS_CODE  0x01
  102. #endif
  103.  
  104. #if defined(VAXC) || defined(VMS)
  105. #  define OS_CODE  0x02
  106. #  define F_OPEN(name, mode) \
  107.      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
  108. #endif
  109.  
  110. #if defined(ATARI) || defined(atarist)
  111. #  define OS_CODE  0x05
  112. #endif
  113.  
  114. #ifdef OS2
  115. #  define OS_CODE  0x06
  116. #  if defined(M_I86) && !defined(Z_SOLO)
  117. #    include <malloc.h>
  118. #  endif
  119. #endif
  120.  
  121. #if defined(MACOS) || defined(TARGET_OS_MAC)
  122. #  define OS_CODE  0x07
  123. #  ifndef Z_SOLO
  124. #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
  125. #      include <unix.h> /* for fdopen */
  126. #    else
  127. #      ifndef fdopen
  128. #        define fdopen(fd,mode) NULL /* No fdopen() */
  129. #      endif
  130. #    endif
  131. #  endif
  132. #endif
  133.  
  134. #ifdef TOPS20
  135. #  define OS_CODE  0x0a
  136. #endif
  137.  
  138. #ifdef WIN32
  139. #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
  140. #    define OS_CODE  0x0b
  141. #  endif
  142. #endif
  143.  
  144. #ifdef __50SERIES /* Prime/PRIMOS */
  145. #  define OS_CODE  0x0f
  146. #endif
  147.  
  148. #if defined(_BEOS_) || defined(RISCOS)
  149. #  define fdopen(fd,mode) NULL /* No fdopen() */
  150. #endif
  151.  
  152. #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
  153. #  if defined(_WIN32_WCE)
  154. #    define fdopen(fd,mode) NULL /* No fdopen() */
  155. #    ifndef _PTRDIFF_T_DEFINED
  156.        typedef int ptrdiff_t;
  157. #      define _PTRDIFF_T_DEFINED
  158. #    endif
  159. #  else
  160. #    define fdopen(fd,type)  _fdopen(fd,type)
  161. #  endif
  162. #endif
  163.  
  164. #if defined(__BORLANDC__) && !defined(MSDOS)
  165.   #pragma warn -8004
  166.   #pragma warn -8008
  167.   #pragma warn -8066
  168. #endif
  169.  
  170. /* provide prototypes for these when building zlib without LFS */
  171. #if !defined(_WIN32) && \
  172.     (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
  173.     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
  174.     ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
  175. #endif
  176.  
  177.         /* common defaults */
  178.  
  179. #ifndef OS_CODE
  180. #  define OS_CODE  0x03  /* assume Unix */
  181. #endif
  182.  
  183. #ifndef F_OPEN
  184. #  define F_OPEN(name, mode) fopen((name), (mode))
  185. #endif
  186.  
  187.          /* functions */
  188.  
  189. #if defined(pyr) || defined(Z_SOLO)
  190. #  define NO_MEMCPY
  191. #endif
  192. #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
  193.  /* Use our own functions for small and medium model with MSC <= 5.0.
  194.   * You may have to use the same strategy for Borland C (untested).
  195.   * The __SC__ check is for Symantec.
  196.   */
  197. #  define NO_MEMCPY
  198. #endif
  199. #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
  200. #  define HAVE_MEMCPY
  201. #endif
  202. #ifdef HAVE_MEMCPY
  203. #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
  204. #    define zmemcpy _fmemcpy
  205. #    define zmemcmp _fmemcmp
  206. #    define zmemzero(dest, len) _fmemset(dest, 0, len)
  207. #  else
  208. #    define zmemcpy memcpy
  209. #    define zmemcmp memcmp
  210. #    define zmemzero(dest, len) memset(dest, 0, len)
  211. #  endif
  212. #else
  213.    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
  214.    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
  215.    void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
  216. #endif
  217.  
  218. /* Diagnostic functions */
  219. #ifdef DEBUG
  220. #  include <stdio.h>
  221.    extern int ZLIB_INTERNAL z_verbose;
  222.    extern void ZLIB_INTERNAL z_error OF((char *m));
  223. #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
  224. #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
  225. #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
  226. #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
  227. #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
  228. #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
  229. #else
  230. #  define Assert(cond,msg)
  231. #  define Trace(x)
  232. #  define Tracev(x)
  233. #  define Tracevv(x)
  234. #  define Tracec(c,x)
  235. #  define Tracecv(c,x)
  236. #endif
  237.  
  238. #ifndef Z_SOLO
  239.    voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
  240.                                     unsigned size));
  241.    void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
  242. #endif
  243.  
  244. #define ZALLOC(strm, items, size) \
  245.            (*((strm)->zalloc))((strm)->opaque, (items), (size))
  246. #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
  247. #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
  248.  
  249. /* Reverse the bytes in a 32-bit value */
  250. #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
  251.                     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
  252.  
  253. #endif /* ZUTIL_H */
  254.