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#ifndef ZUTIL_H
12#define ZUTIL_H
13
14#ifdef HAVE_HIDDEN
15#  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
16#else
17#  define ZLIB_INTERNAL
18#endif
19
20#include "zlib.h"
21
22#if defined(STDC) && !defined(Z_SOLO) && !defined(_KERNEL)
23#  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
24#    include <stddef.h>
25#  endif
26#  include <string.h>
27#  include <stdlib.h>
28#endif
29
30#ifdef Z_SOLO
31   typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
32#endif
33
34#ifndef local
35#  define local static
36#endif
37/* since "static" is used to mean two completely different things in C, we
38   define "local" for the non-static meaning of "static", for readability
39   (compile with -Dlocal if your debugger can't find static symbols) */
40
41typedef unsigned char  uch;
42typedef uch FAR uchf;
43typedef unsigned short ush;
44typedef ush FAR ushf;
45typedef unsigned long  ulg;
46
47extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
48/* (size given to avoid silly warnings with Visual C++) */
49
50#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
51
52#define ERR_RETURN(strm,err) \
53  return (strm->msg = ERR_MSG(err), (err))
54/* To be used only when the state is known to be valid */
55
56        /* common constants */
57
58#ifndef DEF_WBITS
59#  define DEF_WBITS MAX_WBITS
60#endif
61/* default windowBits for decompression. MAX_WBITS is for compression only */
62
63#if MAX_MEM_LEVEL >= 8
64#  define DEF_MEM_LEVEL 8
65#else
66#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
67#endif
68/* default memLevel */
69
70#define STORED_BLOCK 0
71#define STATIC_TREES 1
72#define DYN_TREES    2
73/* The three kinds of block type */
74
75#define MIN_MATCH  3
76#define MAX_MATCH  258
77/* The minimum and maximum match lengths */
78
79#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
80
81        /* target dependencies */
82
83#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
84#  define OS_CODE  0x00
85#  ifndef Z_SOLO
86#    if defined(__TURBOC__) || defined(__BORLANDC__)
87#      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
88         /* Allow compilation with ANSI keywords only enabled */
89         void _Cdecl farfree( void *block );
90         void *_Cdecl farmalloc( unsigned long nbytes );
91#      else
92#        include <alloc.h>
93#      endif
94#    else /* MSC or DJGPP */
95#      include <malloc.h>
96#    endif
97#  endif
98#endif
99
100#ifdef AMIGA
101#  define OS_CODE  1
102#endif
103
104#if defined(VAXC) || defined(VMS)
105#  define OS_CODE  2
106#  define F_OPEN(name, mode) \
107     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
108#endif
109
110#ifdef __370__
111#  if __TARGET_LIB__ < 0x20000000
112#    define OS_CODE 4
113#  elif __TARGET_LIB__ < 0x40000000
114#    define OS_CODE 11
115#  else
116#    define OS_CODE 8
117#  endif
118#endif
119
120#if defined(ATARI) || defined(atarist)
121#  define OS_CODE  5
122#endif
123
124#ifdef OS2
125#  define OS_CODE  6
126#  if defined(M_I86) && !defined(Z_SOLO)
127#    include <malloc.h>
128#  endif
129#endif
130
131#if defined(MACOS) || defined(TARGET_OS_MAC)
132#  define OS_CODE  7
133#  ifndef Z_SOLO
134#    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
135#      include <unix.h> /* for fdopen */
136#    else
137#      ifndef fdopen
138#        define fdopen(fd,mode) NULL /* No fdopen() */
139#      endif
140#    endif
141#  endif
142#endif
143
144#ifdef __acorn
145#  define OS_CODE 13
146#endif
147
148#if defined(WIN32) && !defined(__CYGWIN__)
149#  define OS_CODE  10
150#endif
151
152#ifdef _BEOS_
153#  define OS_CODE  16
154#endif
155
156#ifdef __TOS_OS400__
157#  define OS_CODE 18
158#endif
159
160#ifdef __APPLE__
161#  define OS_CODE 19
162#endif
163
164#if defined(_BEOS_) || defined(RISCOS)
165#  define fdopen(fd,mode) NULL /* No fdopen() */
166#endif
167
168#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
169#  if defined(_WIN32_WCE)
170#    define fdopen(fd,mode) NULL /* No fdopen() */
171#    ifndef _PTRDIFF_T_DEFINED
172       typedef int ptrdiff_t;
173#      define _PTRDIFF_T_DEFINED
174#    endif
175#  else
176#    define fdopen(fd,type)  _fdopen(fd,type)
177#  endif
178#endif
179
180#if defined(__BORLANDC__) && !defined(MSDOS)
181  #pragma warn -8004
182  #pragma warn -8008
183  #pragma warn -8066
184#endif
185
186/* provide prototypes for these when building zlib without LFS */
187#if !defined(_WIN32) && \
188    (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
189    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
190    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
191#endif
192
193        /* common defaults */
194
195#ifndef OS_CODE
196#  define OS_CODE  3     /* assume Unix */
197#endif
198
199#ifndef F_OPEN
200#  define F_OPEN(name, mode) fopen((name), (mode))
201#endif
202
203         /* functions */
204
205#if defined(pyr) || defined(Z_SOLO)
206#  define NO_MEMCPY
207#endif
208#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
209 /* Use our own functions for small and medium model with MSC <= 5.0.
210  * You may have to use the same strategy for Borland C (untested).
211  * The __SC__ check is for Symantec.
212  */
213#  define NO_MEMCPY
214#endif
215#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
216#  define HAVE_MEMCPY
217#endif
218#ifdef HAVE_MEMCPY
219#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
220#    define zmemcpy _fmemcpy
221#    define zmemcmp _fmemcmp
222#    define zmemzero(dest, len) _fmemset(dest, 0, len)
223#  else
224#    define zmemcpy memcpy
225#    define zmemcmp memcmp
226#    define zmemzero(dest, len) memset(dest, 0, len)
227#  endif
228#else
229   void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
230   int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
231   void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
232#endif
233
234/* Diagnostic functions */
235#ifdef ZLIB_DEBUG
236#  include <stdio.h>
237   extern int ZLIB_INTERNAL z_verbose;
238   extern void ZLIB_INTERNAL z_error OF((char *m));
239#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
240#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
241#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
242#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
243#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
244#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
245#else
246#  define Assert(cond,msg)
247#  define Trace(x)
248#  define Tracev(x)
249#  define Tracevv(x)
250#  define Tracec(c,x)
251#  define Tracecv(c,x)
252#endif
253
254#ifndef Z_SOLO
255   voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
256                                    unsigned size));
257   void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
258#endif
259
260#define ZALLOC(strm, items, size) \
261           (*((strm)->zalloc))((strm)->opaque, (items), (size))
262#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
263#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
264
265/* Reverse the bytes in a 32-bit value */
266#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
267                    (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
268
269#endif /* ZUTIL_H */
270