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1 /* zutil.h -- internal interface and configuration of the compression library

3 * For conditions of distribution and use, see copyright notice in zlib.h

4 */

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 */

11 /* @(#) $Id$ */

13 #ifndef ZUTIL_H

14 #define ZUTIL_H

16 #ifdef HAVE_HIDDEN

17 # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))

18 #else

19 # define ZLIB_INTERNAL

20 #endif

22 #include "zlib.h"

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

32 #ifdef Z_SOLO

33 typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */

34 #endif

36 #ifndef local

37 # define local static

38 #endif

39 /* compile with -Dlocal if your debugger can't find static symbols */

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;

 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */

48 /* (size given to avoid silly warnings with Visual C++) */

50 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]

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 */

56 /* common constants */

58 #ifndef DEF_WBITS

59 # define DEF_WBITS MAX_WBITS

60 #endif

61 /* default windowBits for decompression. MAX_WBITS is for compression only */

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 */

70 #define STORED_BLOCK 0

71 #define STATIC_TREES 1

72 #define DYN_TREES 2

73 /* The three kinds of block type */

75 #define MIN_MATCH 3

76 #define MAX_MATCH 258

77 /* The minimum and maximum match lengths */

79 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */

81 /* target dependencies */

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 */

          void _Cdecl farfree( void *block );

          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

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) \

      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)

     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));

     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

    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));

    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));

    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;

    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

    voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,

240 unsigned size));

    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 */