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 #ifndef Z_FREETYPE
57 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
58 /* (size given to avoid silly warnings with Visual C++) */
59 #endif /* !Z_FREETYPE */
60
61 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
62
63 #define ERR_RETURN(strm,err) \
64 return (strm->msg = ERR_MSG(err), (err))
65 /* To be used only when the state is known to be valid */
66
67 /* common constants */
68
69 #ifndef DEF_WBITS
70 # define DEF_WBITS MAX_WBITS
71 #endif
72 /* default windowBits for decompression. MAX_WBITS is for compression only */
73
74 #if MAX_MEM_LEVEL >= 8
75 # define DEF_MEM_LEVEL 8
76 #else
77 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
78 #endif
79 /* default memLevel */
80
81 #define STORED_BLOCK 0
82 #define STATIC_TREES 1
83 #define DYN_TREES 2
84 /* The three kinds of block type */
85
86 #define MIN_MATCH 3
87 #define MAX_MATCH 258
88 /* The minimum and maximum match lengths */
89
90 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
91
92 /* target dependencies */
93
94 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
95 # define OS_CODE 0x00
96 # ifndef Z_SOLO
97 # if defined(__TURBOC__) || defined(__BORLANDC__)
98 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
99 /* Allow compilation with ANSI keywords only enabled */
100 void _Cdecl farfree( void *block );
101 void *_Cdecl farmalloc( unsigned long nbytes );
102 # else
103 # include <alloc.h>
104 # endif
105 # else /* MSC or DJGPP */
106 # include <malloc.h>
107 # endif
108 # endif
109 #endif
110
111 #ifdef AMIGA
112 # define OS_CODE 1
113 #endif
114
115 #if defined(VAXC) || defined(VMS)
116 # define OS_CODE 2
117 # define F_OPEN(name, mode) \
118 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
119 #endif
120
121 #ifdef __370__
122 # if __TARGET_LIB__ < 0x20000000
123 # define OS_CODE 4
124 # elif __TARGET_LIB__ < 0x40000000
125 # define OS_CODE 11
126 # else
127 # define OS_CODE 8
128 # endif
129 #endif
130
131 #if defined(ATARI) || defined(atarist)
132 # define OS_CODE 5
133 #endif
134
135 #ifdef OS2
136 # define OS_CODE 6
137 # if defined(M_I86) && !defined(Z_SOLO)
138 # include <malloc.h>
139 # endif
140 #endif
141
142 #if defined(MACOS) || defined(TARGET_OS_MAC)
143 # define OS_CODE 7
144 # ifndef Z_SOLO
145 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
146 # include <unix.h> /* for fdopen */
147 # else
148 # ifndef fdopen
149 # define fdopen(fd,mode) NULL /* No fdopen() */
150 # endif
151 # endif
152 # endif
153 #endif
154
155 #ifdef __acorn
156 # define OS_CODE 13
157 #endif
158
159 #if defined(WIN32) && !defined(__CYGWIN__)
160 # define OS_CODE 10
161 #endif
162
163 #ifdef _BEOS_
164 # define OS_CODE 16
165 #endif
166
167 #ifdef __TOS_OS400__
168 # define OS_CODE 18
169 #endif
170
171 #ifdef __APPLE__
172 # define OS_CODE 19
173 #endif
174
175 #if defined(_BEOS_) || defined(RISCOS)
176 # define fdopen(fd,mode) NULL /* No fdopen() */
177 #endif
178
179 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
180 # if defined(_WIN32_WCE)
181 # define fdopen(fd,mode) NULL /* No fdopen() */
182 # else
183 # define fdopen(fd,type) _fdopen(fd,type)
184 # endif
185 #endif
186
187 #if defined(__BORLANDC__) && !defined(MSDOS)
188 #pragma warn -8004
189 #pragma warn -8008
190 #pragma warn -8066
191 #endif
192
193 #ifndef Z_FREETYPE
194
195 /* provide prototypes for these when building zlib without LFS */
196 #if !defined(_WIN32) && \
197 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
198 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
199 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
200 ZEXTERN uLong ZEXPORT crc32_combine_gen64 OF((z_off_t));
201 #endif
202
203 #endif /* !Z_FREETYPE */
204
205 /* common defaults */
206
207 #ifndef OS_CODE
208 # define OS_CODE 3 /* assume Unix */
209 #endif
210
211 #ifndef F_OPEN
212 # define F_OPEN(name, mode) fopen((name), (mode))
213 #endif
214
215 /* functions */
216
217 #if defined(pyr) || defined(Z_SOLO)
218 # define NO_MEMCPY
219 #endif
220 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
221 /* Use our own functions for small and medium model with MSC <= 5.0.
222 * You may have to use the same strategy for Borland C (untested).
223 * The __SC__ check is for Symantec.
224 */
225 # define NO_MEMCPY
226 #endif
227 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
228 # define HAVE_MEMCPY
229 #endif
230 #ifdef HAVE_MEMCPY
231 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
232 # define zmemcpy _fmemcpy
233 # define zmemcmp _fmemcmp
234 # define zmemzero(dest, len) _fmemset(dest, 0, len)
235 # else
236 # define zmemcpy ft_memcpy
237 # define zmemcmp ft_memcmp
238 # define zmemzero(dest, len) ft_memset(dest, 0, len)
239 # endif
240 #else
241 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
242 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
243 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
244 #endif
245
246 /* Diagnostic functions */
247 #ifdef ZLIB_DEBUG
248 # include <stdio.h>
249 extern int ZLIB_INTERNAL z_verbose;
250 extern void ZLIB_INTERNAL z_error OF((char *m));
251 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
252 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
253 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
254 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
255 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
256 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
257 #else
258 # define Assert(cond,msg)
259 # define Trace(x)
260 # define Tracev(x)
261 # define Tracevv(x)
262 # define Tracec(c,x)
263 # define Tracecv(c,x)
264 #endif
265
266 #ifndef Z_SOLO
267 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
268 unsigned size));
269 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
270 #endif
271
272 #define ZALLOC(strm, items, size) \
273 (*((strm)->zalloc))((strm)->opaque, (items), (size))
274 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
275 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
276
277 /* Reverse the bytes in a 32-bit value */
278 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
279 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
280
281 #endif /* ZUTIL_H */