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zutil.h
Go to the documentation of this file.
1 /* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2010 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 #if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
17 # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
18 #else
19 # define ZLIB_INTERNAL
20 #endif
21
22 #include "zlib.h"
23
24 #ifdef STDC
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 #ifndef local
33 # define local static
34 #endif
35 /* compile with -Dlocal if your debugger can't find static symbols */
36
37 typedef unsigned char uch;
38 typedef uch FAR uchf;
39 typedef unsigned short ush;
40 typedef ush FAR ushf;
41 typedef unsigned long ulg;
42
43 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
44 /* (size given to avoid silly warnings with Visual C++) */
45
46 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
47
48 #define ERR_RETURN(strm,err) \
49 return (strm->msg = (char*)ERR_MSG(err), (err))
50 /* To be used only when the state is known to be valid */
51
52 /* common constants */
53
54 #ifndef DEF_WBITS
55 # define DEF_WBITS MAX_WBITS
56 #endif
57 /* default windowBits for decompression. MAX_WBITS is for compression only */
58
59 #if MAX_MEM_LEVEL >= 8
60 # define DEF_MEM_LEVEL 8
61 #else
62 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
63 #endif
64 /* default memLevel */
65
66 #define STORED_BLOCK 0
67 #define STATIC_TREES 1
68 #define DYN_TREES 2
69 /* The three kinds of block type */
70
71 #define MIN_MATCH 3
72 #define MAX_MATCH 258
73 /* The minimum and maximum match lengths */
74
75 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
76
77 /* target dependencies */
78
79 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
80 # define OS_CODE 0x00
81 # if defined(__TURBOC__) || defined(__BORLANDC__)
82 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
83 /* Allow compilation with ANSI keywords only enabled */
84 void _Cdecl farfree( void *block );
85 void *_Cdecl farmalloc( unsigned long nbytes );
86 # else
87 # include <alloc.h>
88 # endif
89 # else /* MSC or DJGPP */
90 # include <malloc.h>
91 # endif
92 #endif
93
94 #ifdef AMIGA
95 # define OS_CODE 0x01
96 #endif
97
98 #if defined(VAXC) || defined(VMS)
99 # define OS_CODE 0x02
100 # define F_OPEN(name, mode) \
101 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
102 #endif
103
104 #if defined(ATARI) || defined(atarist)
105 # define OS_CODE 0x05
106 #endif
107
108 #ifdef OS2
109 # define OS_CODE 0x06
110 # ifdef M_I86
111 # include <malloc.h>
112 # endif
113 #endif
114
115 #if defined(MACOS) || defined(TARGET_OS_MAC)
116 # define OS_CODE 0x07
117 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
118 # include <unix.h> /* for fdopen */
119 # else
120 # ifndef fdopen
121 # define fdopen(fd,mode) NULL /* No fdopen() */
122 # endif
123 # endif
124 #endif
125
126 #ifdef TOPS20
127 # define OS_CODE 0x0a
128 #endif
129
130 #ifdef WIN32
131 # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
132 # define OS_CODE 0x0b
133 # endif
134 #endif
135
136 #ifdef __50SERIES /* Prime/PRIMOS */
137 # define OS_CODE 0x0f
138 #endif
139
140 #if defined(_BEOS_) || defined(RISCOS)
141 # define fdopen(fd,mode) NULL /* No fdopen() */
142 #endif
143
144 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
145 # if defined(_WIN32_WCE)
146 # define fdopen(fd,mode) NULL /* No fdopen() */
147 # ifndef _PTRDIFF_T_DEFINED
148 typedef int ptrdiff_t;
149 # define _PTRDIFF_T_DEFINED
150 # endif
151 # else
152 # define fdopen(fd,type) _fdopen(fd,type)
153 # endif
154 #endif
155
156 #if defined(__BORLANDC__)
157 #pragma warn -8004
158 #pragma warn -8008
159 #pragma warn -8066
160 #endif
161
162 /* provide prototypes for these when building zlib without LFS */
163 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
164 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
165 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
166 #endif
167
168 /* common defaults */
169
170 #ifndef OS_CODE
171 # define OS_CODE 0x03 /* assume Unix */
172 #endif
173
174 #ifndef F_OPEN
175 # define F_OPEN(name, mode) fopen((name), (mode))
176 #endif
177
178 /* functions */
179
180 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
181 # ifndef HAVE_VSNPRINTF
182 # define HAVE_VSNPRINTF
183 # endif
184 #endif
185 #if defined(__CYGWIN__)
186 # ifndef HAVE_VSNPRINTF
187 # define HAVE_VSNPRINTF
188 # endif
189 #endif
190 #ifndef HAVE_VSNPRINTF
191 # ifdef MSDOS
192 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
193 but for now we just assume it doesn't. */
194 # define NO_vsnprintf
195 # endif
196 # ifdef __TURBOC__
197 # define NO_vsnprintf
198 # endif
199 # ifdef WIN32
200 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
201 # if !defined(vsnprintf) && !defined(NO_vsnprintf)
202 # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
203 # define vsnprintf _vsnprintf
204 # endif
205 # endif
206 # endif
207 # ifdef __SASC
208 # define NO_vsnprintf
209 # endif
210 #endif
211 #ifdef VMS
212 # define NO_vsnprintf
213 #endif
214
215 #if defined(pyr)
216 # define NO_MEMCPY
217 #endif
218 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
219 /* Use our own functions for small and medium model with MSC <= 5.0.
220 * You may have to use the same strategy for Borland C (untested).
221 * The __SC__ check is for Symantec.
222 */
223 # define NO_MEMCPY
224 #endif
225 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
226 # define HAVE_MEMCPY
227 #endif
228 #ifdef HAVE_MEMCPY
229 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
230 # define zmemcpy _fmemcpy
231 # define zmemcmp _fmemcmp
232 # define zmemzero(dest, len) _fmemset(dest, 0, len)
233 # else
234 # define zmemcpy memcpy
235 # define zmemcmp memcmp
236 # define zmemzero(dest, len) memset(dest, 0, len)
237 # endif
238 #else
239 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
240 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
241 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
242 #endif
243
244 /* Diagnostic functions */
245 #ifdef DEBUG
246 # include <stdio.h>
247 extern int ZLIB_INTERNAL z_verbose;
248 extern void ZLIB_INTERNAL z_error OF((char *m));
249 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
250 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
251 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
252 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
253 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
254 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
255 #else
256 # define Assert(cond,msg)
257 # define Trace(x)
258 # define Tracev(x)
259 # define Tracevv(x)
260 # define Tracec(c,x)
261 # define Tracecv(c,x)
262 #endif
263
264
265 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
266 unsigned size));
267 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
268
269 #define ZALLOC(strm, items, size) \
270 (*((strm)->zalloc))((strm)->opaque, (items), (size))
271 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
272 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
273
274 #endif /* ZUTIL_H */
voidpf
Byte FAR * voidpf
Definition: zconf.h:355
ushf
ush FAR ushf
Definition: zutil.h:40
zmemcmp
int ZLIB_INTERNAL zmemcmp(Bytef *s1, const Bytef *s2, uInt len) const
Definition: zutil.c:160
z_off_t
#define z_off_t
Definition: zconf.h:383
uLong
unsigned long uLong
Definition: zconf.h:336
Bytef
Byte FAR Bytef
Definition: zconf.h:342
zlib.h
ush
unsigned short ush
Definition: zutil.h:39
FAR
#define FAR
Definition: jmorecfg.h:215
zmemzero
void ZLIB_INTERNAL zmemzero(Bytef *dest, uInt len)
Definition: zutil.c:173
zmemcpy
void ZLIB_INTERNAL zmemcpy(Bytef *dest, const Bytef *source, uInt len)
Definition: zutil.c:149
adler32_combine64
uLong ZEXPORT adler32_combine64(uLong adler1, uLong adler2, z_off64_t len2)
Definition: adler32.c:163
z_errmsg
const char *const z_errmsg[10]
Definition: zutil.c:14
OF
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t))
crc32_combine64
uLong ZEXPORT crc32_combine64(uLong crc1, uLong crc2, z_off64_t len2)
Definition: crc32.c:436
ZEXTERN
#define ZEXTERN
Definition: zconf.h:319
uch
unsigned char uch
Definition: zutil.h:37
ulg
unsigned long ulg
Definition: zutil.h:41
uchf
uch FAR uchf
Definition: zutil.h:38
ZEXPORT
#define ZEXPORT
Definition: zconf.h:322
zcalloc
voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items, unsigned size)
Definition: zutil.c:300
ZLIB_INTERNAL
#define ZLIB_INTERNAL
Definition: zutil.h:19
uInt
unsigned int uInt
Definition: zconf.h:335
zcfree
void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr)
Definition: zutil.c:310