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
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 #ifndef local
33 # define local static
34 #endif
35 /* since "static" is used to mean two completely different things in C, we
36 define "local" for the non-static meaning of "static", for readability
37 (compile with -Dlocal if your debugger can't find static symbols) */
38
39 typedef unsigned char uch;
40 typedef uch FAR uchf;
41 typedef unsigned short ush;
42 typedef ush FAR ushf;
43 typedef unsigned long ulg;
44
45 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
46 # include <limits.h>
47 # if (ULONG_MAX == 0xffffffffffffffff)
48 # define Z_U8 unsigned long
49 # elif (ULLONG_MAX == 0xffffffffffffffff)
50 # define Z_U8 unsigned long long
51 # elif (UINT_MAX == 0xffffffffffffffff)
52 # define Z_U8 unsigned
53 # endif
54 #endif
55
56 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
57 /* (size given to avoid silly warnings with Visual C++) */
58
59 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
60
61 #define ERR_RETURN(strm,err) \
62 return (strm->msg = ERR_MSG(err), (err))
63 /* To be used only when the state is known to be valid */
64
65 /* common constants */
66
67 #ifndef DEF_WBITS
68 # define DEF_WBITS MAX_WBITS
69 #endif
70 /* default windowBits for decompression. MAX_WBITS is for compression only */
71
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
79 #define STORED_BLOCK 0
80 #define STATIC_TREES 1
81 #define DYN_TREES 2
82 /* The three kinds of block type */
83
84 #define MIN_MATCH 3
85 #define MAX_MATCH 258
86 /* The minimum and maximum match lengths */
87
88 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
89
90 /* target dependencies */
91
92 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
93 # define OS_CODE 0x00
94 # ifndef Z_SOLO
95 # if defined(__TURBOC__) || defined(__BORLANDC__)
96 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
97 /* Allow compilation with ANSI keywords only enabled */
98 void _Cdecl farfree( void *block );
99 void *_Cdecl farmalloc( unsigned long nbytes );
100 # else
101 # include <alloc.h>
102 # endif
103 # else /* MSC or DJGPP */
104 # include <malloc.h>
105 # endif
106 # endif
107 #endif
108
109 #ifdef AMIGA
110 # define OS_CODE 1
111 #endif
112
113 #if defined(VAXC) || defined(VMS)
114 # define OS_CODE 2
115 # define F_OPEN(name, mode) \
116 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
117 #endif
118
119 #ifdef __370__
120 # if __TARGET_LIB__ < 0x20000000
121 # define OS_CODE 4
122 # elif __TARGET_LIB__ < 0x40000000
123 # define OS_CODE 11
124 # else
125 # define OS_CODE 8
126 # endif
127 #endif
128
129 #if defined(ATARI) || defined(atarist)
130 # define OS_CODE 5
131 #endif
132
133 #ifdef OS2
134 # define OS_CODE 6
135 # if defined(M_I86) && !defined(Z_SOLO)
136 # include <malloc.h>
137 # endif
138 #endif
139
140 #if defined(MACOS) || defined(TARGET_OS_MAC)
141 # define OS_CODE 7
142 # ifndef Z_SOLO
143 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
144 # include <unix.h> /* for fdopen */
145 # else
146 # ifndef fdopen
147 # define fdopen(fd,mode) NULL /* No fdopen() */
148 # endif
149 # endif
150 # endif
151 #endif
152
153 #ifdef __acorn
154 # define OS_CODE 13
155 #endif
156
157 #if defined(WIN32) && !defined(__CYGWIN__)
158 # define OS_CODE 10
159 #endif
160
161 #ifdef _BEOS_
162 # define OS_CODE 16
163 #endif
164
165 #ifdef __TOS_OS400__
166 # define OS_CODE 18
167 #endif
168
169 #ifdef __APPLE__
170 # define OS_CODE 19
171 #endif
172
173 #if defined(_BEOS_) || defined(RISCOS)
174 # define fdopen(fd,mode) NULL /* No fdopen() */
175 #endif
176
177 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
178 # if defined(_WIN32_WCE)
179 # define fdopen(fd,mode) NULL /* No fdopen() */
180 # else
181 # define fdopen(fd,type) _fdopen(fd,type)
182 # endif
183 #endif
184
185 #if defined(__BORLANDC__) && !defined(MSDOS)
186 #pragma warn -8004
187 #pragma warn -8008
188 #pragma warn -8066
189 #endif
190
191 /* provide prototypes for these when building zlib without LFS */
192 #if !defined(_WIN32) && \
193 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
194 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
195 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
196 #endif
197
198 /* common defaults */
199
200 #ifndef OS_CODE
201 # define OS_CODE 3 /* assume Unix */
202 #endif
203
204 #ifndef F_OPEN
205 # define F_OPEN(name, mode) fopen((name), (mode))
206 #endif
207
208 /* functions */
209
210 #if defined(pyr) || defined(Z_SOLO)
211 # define NO_MEMCPY
212 #endif
213 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
214 /* Use our own functions for small and medium model with MSC <= 5.0.
215 * You may have to use the same strategy for Borland C (untested).
216 * The __SC__ check is for Symantec.
217 */
218 # define NO_MEMCPY
219 #endif
220 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
221 # define HAVE_MEMCPY
222 #endif
223 #ifdef HAVE_MEMCPY
224 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
225 # define zmemcpy _fmemcpy
226 # define zmemcmp _fmemcmp
227 # define zmemzero(dest, len) _fmemset(dest, 0, len)
228 # else
229 # define zmemcpy memcpy
230 # define zmemcmp memcmp
231 # define zmemzero(dest, len) memset(dest, 0, len)
232 # endif
233 #else
234 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
235 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
236 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
237 #endif
238
239 /* Diagnostic functions */
240 #ifdef ZLIB_DEBUG
241 # include <stdio.h>
242 extern int ZLIB_INTERNAL z_verbose;
243 extern void ZLIB_INTERNAL z_error OF((char *m));
244 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
245 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
246 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
247 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
248 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
249 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
250 #else
251 # define Assert(cond,msg)
252 # define Trace(x)
253 # define Tracev(x)
254 # define Tracevv(x)
255 # define Tracec(c,x)
256 # define Tracecv(c,x)
257 #endif
258
259 #ifndef Z_SOLO
260 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
261 unsigned size));
262 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
263 #endif
264
265 #define ZALLOC(strm, items, size) \
266 (*((strm)->zalloc))((strm)->opaque, (items), (size))
267 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
268 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
269
270 /* Reverse the bytes in a 32-bit value */
271 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
272 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
273
274 #endif /* ZUTIL_H */