1 /*
  2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  3  *
  4  * This code is free software; you can redistribute it and/or modify it
  5  * under the terms of the GNU General Public License version 2 only, as
  6  * published by the Free Software Foundation.  Oracle designates this
  7  * particular file as subject to the "Classpath" exception as provided
  8  * by Oracle in the LICENSE file that accompanied this code.
  9  *
 10  * This code is distributed in the hope that it will be useful, but WITHOUT
 11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 13  * version 2 for more details (a copy is included in the LICENSE file that
 14  * accompanied this code).
 15  *
 16  * You should have received a copy of the GNU General Public License version
 17  * 2 along with this work; if not, write to the Free Software Foundation,
 18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 19  *
 20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 21  * or visit www.oracle.com if you need additional information or have any
 22  * questions.
 23  */
 24 
 25 /* zutil.h -- internal interface and configuration of the compression library
 26  * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
 27  * For conditions of distribution and use, see copyright notice in zlib.h
 28  */
 29 
 30 /* WARNING: this file should *not* be used by applications. It is
 31    part of the implementation of the compression library and is
 32    subject to change. Applications should only use zlib.h.
 33  */
 34 
 35 /* @(#) $Id$ */
 36 
 37 #ifndef ZUTIL_H
 38 #define ZUTIL_H
 39 
 40 #ifdef HAVE_HIDDEN
 41 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
 42 #else
 43 #  define ZLIB_INTERNAL
 44 #endif
 45 
 46 #include "zlib.h"
 47 
 48 #if defined(STDC) && !defined(Z_SOLO)
 49 #  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
 50 #    include <stddef.h>
 51 #  endif
 52 #  include <string.h>
 53 #  include <stdlib.h>
 54 #endif
 55 
 56 #ifndef local
 57 #  define local static
 58 #endif
 59 /* since "static" is used to mean two completely different things in C, we
 60    define "local" for the non-static meaning of "static", for readability
 61    (compile with -Dlocal if your debugger can't find static symbols) */
 62 
 63 typedef unsigned char  uch;
 64 typedef uch FAR uchf;
 65 typedef unsigned short ush;
 66 typedef ush FAR ushf;
 67 typedef unsigned long  ulg;
 68 
 69 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
 70 #  include <limits.h>
 71 #  if (ULONG_MAX == 0xffffffffffffffff)
 72 #    define Z_U8 unsigned long
 73 #  elif (ULLONG_MAX == 0xffffffffffffffff)
 74 #    define Z_U8 unsigned long long
 75 #  elif (UINT_MAX == 0xffffffffffffffff)
 76 #    define Z_U8 unsigned
 77 #  endif
 78 #endif
 79 
 80 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 81 /* (size given to avoid silly warnings with Visual C++) */
 82 
 83 #define ERR_MSG(err) z_errmsg[(err) < -6 || (err) > 2 ? 9 : 2 - (err)]
 84 
 85 #define ERR_RETURN(strm,err) \
 86   return (strm->msg = ERR_MSG(err), (err))
 87 /* To be used only when the state is known to be valid */
 88 
 89         /* common constants */
 90 
 91 #ifndef DEF_WBITS
 92 #  define DEF_WBITS MAX_WBITS
 93 #endif
 94 /* default windowBits for decompression. MAX_WBITS is for compression only */
 95 
 96 #if MAX_MEM_LEVEL >= 8
 97 #  define DEF_MEM_LEVEL 8
 98 #else
 99 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
100 #endif
101 /* default memLevel */
102 
103 #define STORED_BLOCK 0
104 #define STATIC_TREES 1
105 #define DYN_TREES    2
106 /* The three kinds of block type */
107 
108 #define MIN_MATCH  3
109 #define MAX_MATCH  258
110 /* The minimum and maximum match lengths */
111 
112 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
113 
114         /* target dependencies */
115 
116 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
117 #  define OS_CODE  0x00
118 #  ifndef Z_SOLO
119 #    if defined(__TURBOC__) || defined(__BORLANDC__)
120 #      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
121          /* Allow compilation with ANSI keywords only enabled */
122          void _Cdecl farfree( void *block );
123          void *_Cdecl farmalloc( unsigned long nbytes );
124 #      else
125 #        include <alloc.h>
126 #      endif
127 #    else /* MSC or DJGPP */
128 #      include <malloc.h>
129 #    endif
130 #  endif
131 #endif
132 
133 #ifdef AMIGA
134 #  define OS_CODE  1
135 #endif
136 
137 #if defined(VAXC) || defined(VMS)
138 #  define OS_CODE  2
139 #  define F_OPEN(name, mode) \
140      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
141 #endif
142 
143 #ifdef __370__
144 #  if __TARGET_LIB__ < 0x20000000
145 #    define OS_CODE 4
146 #  elif __TARGET_LIB__ < 0x40000000
147 #    define OS_CODE 11
148 #  else
149 #    define OS_CODE 8
150 #  endif
151 #endif
152 
153 #if defined(ATARI) || defined(atarist)
154 #  define OS_CODE  5
155 #endif
156 
157 #ifdef OS2
158 #  define OS_CODE  6
159 #  if defined(M_I86) && !defined(Z_SOLO)
160 #    include <malloc.h>
161 #  endif
162 #endif
163 
164 #if defined(MACOS)
165 #  define OS_CODE  7
166 #endif
167 
168 #ifdef __acorn
169 #  define OS_CODE 13
170 #endif
171 
172 #if defined(WIN32) && !defined(__CYGWIN__)
173 #  define OS_CODE  10
174 #endif
175 
176 #ifdef _BEOS_
177 #  define OS_CODE  16
178 #endif
179 
180 #ifdef __TOS_OS400__
181 #  define OS_CODE 18
182 #endif
183 
184 #ifdef __APPLE__
185 #  define OS_CODE 19
186 #endif
187 
188 #if defined(__BORLANDC__) && !defined(MSDOS)
189   #pragma warn -8004
190   #pragma warn -8008
191   #pragma warn -8066
192 #endif
193 
194 /* provide prototypes for these when building zlib without LFS */
195 #if !defined(_WIN32) && \
196     (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
197     ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off_t);
198     ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off_t);
199     ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off_t);
200 #endif
201 
202         /* common defaults */
203 
204 #ifndef OS_CODE
205 #  define OS_CODE  3     /* assume Unix */
206 #endif
207 
208 #ifndef F_OPEN
209 #  define F_OPEN(name, mode) fopen((name), (mode))
210 #endif
211 
212          /* functions */
213 
214 #if defined(pyr) || defined(Z_SOLO)
215 #  define NO_MEMCPY
216 #endif
217 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
218  /* Use our own functions for small and medium model with MSC <= 5.0.
219   * You may have to use the same strategy for Borland C (untested).
220   * The __SC__ check is for Symantec.
221   */
222 #  define NO_MEMCPY
223 #endif
224 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
225 #  define HAVE_MEMCPY
226 #endif
227 #ifdef HAVE_MEMCPY
228 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
229 #    define zmemcpy _fmemcpy
230 #    define zmemcmp _fmemcmp
231 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
232 #  else
233 #    define zmemcpy memcpy
234 #    define zmemcmp memcmp
235 #    define zmemzero(dest, len) memset(dest, 0, len)
236 #  endif
237 #else
238    void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len);
239    int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len);
240    void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len);
241 #endif
242 
243 /* Diagnostic functions */
244 #ifdef ZLIB_DEBUG
245 #  include <stdio.h>
246    extern int ZLIB_INTERNAL z_verbose;
247    extern void ZLIB_INTERNAL z_error(char *m);
248 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
249 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
250 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
251 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
252 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
253 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
254 #else
255 #  define Assert(cond,msg)
256 #  define Trace(x)
257 #  define Tracev(x)
258 #  define Tracevv(x)
259 #  define Tracec(c,x)
260 #  define Tracecv(c,x)
261 #endif
262 
263 #ifndef Z_SOLO
264    voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items,
265                                 unsigned size);
266    void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr);
267 #endif
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 /* Reverse the bytes in a 32-bit value */
275 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
276                     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
277 
278 #endif /* ZUTIL_H */