zutil.h 7.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295
  1. /* zutil.h -- internal interface and configuration of the compression library
  2. * Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler
  3. * For conditions of distribution and use, see copyright notice in zlib.h
  4. */
  5. /* WARNING: this file should *not* be used by applications. It is
  6. part of the implementation of the compression library and is
  7. subject to change. Applications should only use zlib.h.
  8. */
  9. /* @(#) $Id$ */
  10. #ifndef ZUTIL_H
  11. #define ZUTIL_H
  12. #ifdef HAVE_HIDDEN
  13. # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
  14. #else
  15. # define ZLIB_INTERNAL
  16. #endif
  17. #include "zlib.h"
  18. #if defined(STDC) && !defined(Z_SOLO)
  19. # if !(defined(_WIN32_WCE) && defined(_MSC_VER))
  20. # include <stddef.h>
  21. # endif
  22. # include <string.h>
  23. # include <stdlib.h>
  24. #endif
  25. #ifdef NO_ERRNO_H
  26. # ifdef _WIN32_WCE
  27. /* The Microsoft C Run-Time Library for Windows CE doesn't have
  28. * errno. We define it as a global variable to simplify porting.
  29. * Its value is always 0 and should not be used. We rename it to
  30. * avoid conflict with other libraries that use the same workaround.
  31. */
  32. # define errno z_errno
  33. # endif
  34. extern int errno;
  35. #else
  36. # ifndef _WIN32_WCE
  37. # include <errno.h>
  38. # endif
  39. #endif
  40. #ifndef local
  41. # define local static
  42. #endif
  43. /* since "static" is used to mean two completely different things in C, we
  44. define "local" for the non-static meaning of "static", for readability
  45. (compile with -Dlocal if your debugger can't find static symbols) */
  46. typedef unsigned char uch;
  47. typedef uch FAR uchf;
  48. typedef unsigned short ush;
  49. typedef ush FAR ushf;
  50. typedef unsigned long ulg;
  51. #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
  52. # include <limits.h>
  53. # if (ULONG_MAX == 0xffffffffffffffff)
  54. # define Z_U8 unsigned long
  55. # elif (ULLONG_MAX == 0xffffffffffffffff)
  56. # define Z_U8 unsigned long long
  57. # elif (UINT_MAX == 0xffffffffffffffff)
  58. # define Z_U8 unsigned
  59. # endif
  60. #endif
  61. extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  62. /* (size given to avoid silly warnings with Visual C++) */
  63. #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  64. #define ERR_RETURN(strm,err) \
  65. return (strm->msg = ERR_MSG(err), (err))
  66. /* To be used only when the state is known to be valid */
  67. /* common constants */
  68. #ifndef DEF_WBITS
  69. # define DEF_WBITS MAX_WBITS
  70. #endif
  71. /* default windowBits for decompression. MAX_WBITS is for compression only */
  72. #if MAX_MEM_LEVEL >= 8
  73. # define DEF_MEM_LEVEL 8
  74. #else
  75. # define DEF_MEM_LEVEL MAX_MEM_LEVEL
  76. #endif
  77. /* default memLevel */
  78. #define STORED_BLOCK 0
  79. #define STATIC_TREES 1
  80. #define DYN_TREES 2
  81. /* The three kinds of block type */
  82. #define MIN_MATCH 3
  83. #define MAX_MATCH 258
  84. /* The minimum and maximum match lengths */
  85. #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  86. /* target dependencies */
  87. #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  88. # define OS_CODE 0x00
  89. # ifndef Z_SOLO
  90. # if defined(__TURBOC__) || defined(__BORLANDC__)
  91. # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  92. /* Allow compilation with ANSI keywords only enabled */
  93. void _Cdecl farfree( void *block );
  94. void *_Cdecl farmalloc( unsigned long nbytes );
  95. # else
  96. # include <alloc.h>
  97. # endif
  98. # else /* MSC or DJGPP */
  99. # include <malloc.h>
  100. # endif
  101. # endif
  102. #endif
  103. #ifdef AMIGA
  104. # define OS_CODE 1
  105. #endif
  106. #if defined(VAXC) || defined(VMS)
  107. # define OS_CODE 2
  108. # define F_OPEN(name, mode) \
  109. fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
  110. #endif
  111. #ifdef __370__
  112. # if __TARGET_LIB__ < 0x20000000
  113. # define OS_CODE 4
  114. # elif __TARGET_LIB__ < 0x40000000
  115. # define OS_CODE 11
  116. # else
  117. # define OS_CODE 8
  118. # endif
  119. #endif
  120. #if defined(ATARI) || defined(atarist)
  121. # define OS_CODE 5
  122. #endif
  123. #ifdef OS2
  124. # define OS_CODE 6
  125. # if defined(M_I86) && !defined(Z_SOLO)
  126. # include <malloc.h>
  127. # endif
  128. #endif
  129. #if defined(MACOS) || defined(TARGET_OS_MAC)
  130. # define OS_CODE 7
  131. # ifndef Z_SOLO
  132. # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
  133. # include <unix.h> /* for fdopen */
  134. # else
  135. # ifndef fdopen
  136. # define fdopen(fd,mode) NULL /* No fdopen() */
  137. # endif
  138. # endif
  139. # endif
  140. #endif
  141. #ifdef __acorn
  142. # define OS_CODE 13
  143. #endif
  144. #if defined(WIN32) && !defined(__CYGWIN__)
  145. # define OS_CODE 10
  146. #endif
  147. #ifdef _BEOS_
  148. # define OS_CODE 16
  149. #endif
  150. #ifdef __TOS_OS400__
  151. # define OS_CODE 18
  152. #endif
  153. #ifdef __APPLE__
  154. # define OS_CODE 19
  155. #endif
  156. #if defined(_BEOS_) || defined(RISCOS)
  157. # define fdopen(fd,mode) NULL /* No fdopen() */
  158. #endif
  159. #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
  160. # if defined(_WIN32_WCE)
  161. # define fdopen(fd,mode) NULL /* No fdopen() */
  162. # else
  163. # define fdopen(fd,type) _fdopen(fd,type)
  164. # endif
  165. #endif
  166. #if defined(__BORLANDC__) && !defined(MSDOS)
  167. #pragma warn -8004
  168. #pragma warn -8008
  169. #pragma warn -8066
  170. #endif
  171. /* provide prototypes for these when building zlib without LFS */
  172. #if !defined(_WIN32) && \
  173. (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
  174. ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
  175. ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
  176. #endif
  177. /* common defaults */
  178. #ifndef OS_CODE
  179. # define OS_CODE 3 /* assume Unix */
  180. #endif
  181. #ifndef F_OPEN
  182. # define F_OPEN(name, mode) fopen((name), (mode))
  183. #endif
  184. /* functions */
  185. #if defined(pyr) || defined(Z_SOLO)
  186. # define NO_MEMCPY
  187. #endif
  188. #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
  189. /* Use our own functions for small and medium model with MSC <= 5.0.
  190. * You may have to use the same strategy for Borland C (untested).
  191. * The __SC__ check is for Symantec.
  192. */
  193. # define NO_MEMCPY
  194. #endif
  195. #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
  196. # define HAVE_MEMCPY
  197. #endif
  198. #ifdef HAVE_MEMCPY
  199. # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
  200. # define zmemcpy _fmemcpy
  201. # define zmemcmp _fmemcmp
  202. # define zmemzero(dest, len) _fmemset(dest, 0, len)
  203. # else
  204. # define zmemcpy memcpy
  205. # define zmemcmp memcmp
  206. # define zmemzero(dest, len) memset(dest, 0, len)
  207. # endif
  208. #else
  209. void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
  210. int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
  211. void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
  212. #endif
  213. /* Diagnostic functions */
  214. #ifdef ZLIB_DEBUG
  215. # include <stdio.h>
  216. extern int ZLIB_INTERNAL z_verbose;
  217. extern void ZLIB_INTERNAL z_error OF((char *m));
  218. # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
  219. # define Trace(x) {if (z_verbose>=0) fprintf x ;}
  220. # define Tracev(x) {if (z_verbose>0) fprintf x ;}
  221. # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
  222. # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
  223. # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
  224. #else
  225. # define Assert(cond,msg)
  226. # define Trace(x)
  227. # define Tracev(x)
  228. # define Tracevv(x)
  229. # define Tracec(c,x)
  230. # define Tracecv(c,x)
  231. #endif
  232. #ifndef Z_SOLO
  233. voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
  234. unsigned size));
  235. void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
  236. #endif
  237. #define ZALLOC(strm, items, size) \
  238. (*((strm)->zalloc))((strm)->opaque, (items), (size))
  239. #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
  240. #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
  241. /* Reverse the bytes in a 32-bit value */
  242. #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
  243. (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
  244. #ifdef _MSC_VER
  245. #define zalign(x) __declspec(align(x))
  246. #else
  247. #define zalign(x) __attribute__((aligned((x))))
  248. #endif
  249. #endif /* ZUTIL_H */