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
39typedef unsigned char  uch;
40typedef uch FAR uchf;
41typedef unsigned short ush;
42typedef ush FAR ushf;
43typedef 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
56extern 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 */
275