1 /* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
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: zutil.h,v 1.1.1.2 2002/03/11 21:53:28 tromey Exp $ */
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 /* since "static" is used to mean two completely different things in C, we
40 define "local" for the non-static meaning of "static", for readability
41 (compile with -Dlocal if your debugger can't find static symbols) */
42
43 typedef unsigned char uch;
44 typedef uch FAR uchf;
45 typedef unsigned short ush;
46 typedef ush FAR ushf;
47 typedef unsigned long ulg;
48
49 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
50 /* (size given to avoid silly warnings with Visual C++) */
51
52 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
53
54 #define ERR_RETURN(strm,err) \
55 return (strm->msg = ERR_MSG(err), (err))
56 /* To be used only when the state is known to be valid */
57
58 /* common constants */
59
60 #ifndef DEF_WBITS
61 # define DEF_WBITS MAX_WBITS
62 #endif
63 /* default windowBits for decompression. MAX_WBITS is for compression only */
64
65 #if MAX_MEM_LEVEL >= 8
66 # define DEF_MEM_LEVEL 8
67 #else
68 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
69 #endif
70 /* default memLevel */
71
72 #define STORED_BLOCK 0
73 #define STATIC_TREES 1
74 #define DYN_TREES 2
75 /* The three kinds of block type */
76
77 #define MIN_MATCH 3
78 #define MAX_MATCH 258
79 /* The minimum and maximum match lengths */
80
81 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
82
83 /* target dependencies */
84
85 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
86 # define OS_CODE 0x00
87 # ifndef Z_SOLO
88 # if defined(__TURBOC__) || defined(__BORLANDC__)
89 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
90 /* Allow compilation with ANSI keywords only enabled */
91 void _Cdecl farfree( void *block );
92 void *_Cdecl farmalloc( unsigned long nbytes );
93 # else
94 # include <alloc.h>
95 # endif
96 # else /* MSC or DJGPP */
97 # include <malloc.h>
98 # endif
99 # endif
100 #endif
101
102 #ifdef AMIGA
103 # define OS_CODE 1
104 #endif
105
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
112 #ifdef __370__
113 # if __TARGET_LIB__ < 0x20000000
114 # define OS_CODE 4
115 # elif __TARGET_LIB__ < 0x40000000
116 # define OS_CODE 11
117 # else
118 # define OS_CODE 8
119 # endif
120 #endif
121
122 #if defined(ATARI) || defined(atarist)
123 # define OS_CODE 5
124 #endif
125
126 #ifdef OS2
127 # define OS_CODE 6
128 # if defined(M_I86) && !defined(Z_SOLO)
129 # include <malloc.h>
130 # endif
131 #endif
132
133 #if defined(MACOS) || defined(TARGET_OS_MAC)
134 # define OS_CODE 7
135 # ifndef Z_SOLO
136 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
137 # include <unix.h> /* for fdopen */
138 # else
139 # ifndef fdopen
140 # define fdopen(fd,mode) NULL /* No fdopen() */
141 # endif
142 # endif
143 # endif
144 #endif
145
146 #ifdef __acorn
147 # define OS_CODE 13
148 #endif
149
150 #if defined(WIN32) && !defined(__CYGWIN__)
151 # define OS_CODE 10
152 #endif
153
154 #ifdef _BEOS_
155 # define OS_CODE 16
156 #endif
157
158 #ifdef __TOS_OS400__
159 # define OS_CODE 18
160 #endif
161
162 #ifdef __APPLE__
163 # define OS_CODE 19
164 #endif
165
166 #if defined(_BEOS_) || defined(RISCOS)
167 # define fdopen(fd,mode) NULL /* No fdopen() */
168 #endif
169
170 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
171 # if defined(_WIN32_WCE)
172 # define fdopen(fd,mode) NULL /* No fdopen() */
173 # ifndef _PTRDIFF_T_DEFINED
174 typedef int ptrdiff_t;
175 # define _PTRDIFF_T_DEFINED
176 # endif
177 # else
178 # define fdopen(fd,type) _fdopen(fd,type)
179 # endif
180 #endif
181
182 #if defined(__BORLANDC__) && !defined(MSDOS)
183 #pragma warn -8004
184 #pragma warn -8008
185 #pragma warn -8066
186 #endif
187
188 /* provide prototypes for these when building zlib without LFS */
189 #if !defined(_WIN32) && \
190 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
191 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
192 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
193 #endif
194
195 /* common defaults */
196
197 #ifndef OS_CODE
198 # define OS_CODE 3 /* assume Unix */
199 #endif
200
201 #ifndef F_OPEN
202 # define F_OPEN(name, mode) fopen((name), (mode))
203 #endif
204
205 /* functions */
206
207 #if defined(pyr) || defined(Z_SOLO)
208 # define NO_MEMCPY
209 #endif
210 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
211 /* Use our own functions for small and medium model with MSC <= 5.0.
212 * You may have to use the same strategy for Borland C (untested).
213 * The __SC__ check is for Symantec.
214 */
215 # define NO_MEMCPY
216 #endif
217 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
218 # define HAVE_MEMCPY
219 #endif
220 #ifdef HAVE_MEMCPY
221 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
222 # define zmemcpy _fmemcpy
223 # define zmemcmp _fmemcmp
224 # define zmemzero(dest, len) _fmemset(dest, 0, len)
225 # else
226 # define zmemcpy memcpy
227 # define zmemcmp memcmp
228 # define zmemzero(dest, len) memset(dest, 0, len)
229 # endif
230 #else
231 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
232 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
233 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
234 #endif
235
236 /* Diagnostic functions */
237 #ifdef ZLIB_DEBUG
238 # include <stdio.h>
239 extern int ZLIB_INTERNAL z_verbose;
240 extern void ZLIB_INTERNAL z_error OF((char *m));
241 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
242 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
243 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
244 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
245 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
246 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
247 #else
248 # define Assert(cond,msg)
249 # define Trace(x)
250 # define Tracev(x)
251 # define Tracevv(x)
252 # define Tracec(c,x)
253 # define Tracecv(c,x)
254 #endif
255
256 #ifndef Z_SOLO
257 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
258 unsigned size));
259 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
260 #endif
261
262 #define ZALLOC(strm, items, size) \
263 (*((strm)->zalloc))((strm)->opaque, (items), (size))
264 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
265 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
266
267 /* Reverse the bytes in a 32-bit value */
268 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
269 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
270
271 #endif /* ZUTIL_H */