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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 */
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