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/* @(#) $Id$ */
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#ifdef Z_SOLO
33   typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
34#endif
35
36#ifndef local
37#  define local static
38#endif
39/* since "static" is used to mean two completely different things in C, we
40   define "local" for the non-static meaning of "static", for readability
41   (compile with -Dlocal if your debugger can't find static symbols) */
42
43typedef unsigned char  uch;
44typedef uch FAR uchf;
45typedef unsigned short ush;
46typedef ush FAR ushf;
47typedef unsigned long  ulg;
48
49extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
50/* (size given to avoid silly warnings with Visual C++) */
51
52#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
53
54#define ERR_RETURN(strm,err) \
55  return (strm->msg = ERR_MSG(err), (err))
56/* To be used only when the state is known to be valid */
57
58        /* common constants */
59
60#ifndef DEF_WBITS
61#  define DEF_WBITS MAX_WBITS
62#endif
63/* default windowBits for decompression. MAX_WBITS is for compression only */
64
65#if MAX_MEM_LEVEL >= 8
66#  define DEF_MEM_LEVEL 8
67#else
68#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
69#endif
70/* default memLevel */
71
72#define STORED_BLOCK 0
73#define STATIC_TREES 1
74#define DYN_TREES    2
75/* The three kinds of block type */
76
77#define MIN_MATCH  3
78#define MAX_MATCH  258
79/* The minimum and maximum match lengths */
80
81#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
82
83        /* target dependencies */
84
85#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
86#  define OS_CODE  0x00
87#  ifndef Z_SOLO
88#    if defined(__TURBOC__) || defined(__BORLANDC__)
89#      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
90         /* Allow compilation with ANSI keywords only enabled */
91         void _Cdecl farfree( void *block );
92         void *_Cdecl farmalloc( unsigned long nbytes );
93#      else
94#        include <alloc.h>
95#      endif
96#    else /* MSC or DJGPP */
97#      include <malloc.h>
98#    endif
99#  endif
100#endif
101
102#ifdef AMIGA
103#  define OS_CODE  1
104#endif
105
106#if defined(VAXC) || defined(VMS)
107#  define OS_CODE  2
108#  define F_OPEN(name, mode) \
109     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
110#endif
111
112#ifdef __370__
113#  if __TARGET_LIB__ < 0x20000000
114#    define OS_CODE 4
115#  elif __TARGET_LIB__ < 0x40000000
116#    define OS_CODE 11
117#  else
118#    define OS_CODE 8
119#  endif
120#endif
121
122#if defined(ATARI) || defined(atarist)
123#  define OS_CODE  5
124#endif
125
126#ifdef OS2
127#  define OS_CODE  6
128#  if defined(M_I86) && !defined(Z_SOLO)
129#    include <malloc.h>
130#  endif
131#endif
132
133#if defined(MACOS) || defined(TARGET_OS_MAC)
134#  define OS_CODE  7
135#  ifndef Z_SOLO
136#    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
137#      include <unix.h> /* for fdopen */
138#    else
139#      ifndef fdopen
140#        define fdopen(fd,mode) NULL /* No fdopen() */
141#      endif
142#    endif
143#  endif
144#endif
145
146#ifdef __acorn
147#  define OS_CODE 13
148#endif
149
150#if defined(WIN32) && !defined(__CYGWIN__)
151#  define OS_CODE  10
152#endif
153
154#ifdef _BEOS_
155#  define OS_CODE  16
156#endif
157
158#ifdef __TOS_OS400__
159#  define OS_CODE 18
160#endif
161
162#ifdef __APPLE__
163#  define OS_CODE 19
164#endif
165
166#if defined(_BEOS_) || defined(RISCOS)
167#  define fdopen(fd,mode) NULL /* No fdopen() */
168#endif
169
170#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
171#  if defined(_WIN32_WCE)
172#    define fdopen(fd,mode) NULL /* No fdopen() */
173#    ifndef _PTRDIFF_T_DEFINED
174       typedef int ptrdiff_t;
175#      define _PTRDIFF_T_DEFINED
176#    endif
177#  else
178#    define fdopen(fd,type)  _fdopen(fd,type)
179#  endif
180#endif
181
182#if defined(__BORLANDC__) && !defined(MSDOS)
183  #pragma warn -8004
184  #pragma warn -8008
185  #pragma warn -8066
186#endif
187
188/* provide prototypes for these when building zlib without LFS */
189#if !defined(_WIN32) && \
190    (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
191    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
192    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
193#endif
194
195        /* common defaults */
196
197#ifndef OS_CODE
198#  define OS_CODE  3     /* assume Unix */
199#endif
200
201#ifndef F_OPEN
202#  define F_OPEN(name, mode) fopen((name), (mode))
203#endif
204
205         /* functions */
206
207#if defined(pyr) || defined(Z_SOLO)
208#  define NO_MEMCPY
209#endif
210#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
211 /* Use our own functions for small and medium model with MSC <= 5.0.
212  * You may have to use the same strategy for Borland C (untested).
213  * The __SC__ check is for Symantec.
214  */
215#  define NO_MEMCPY
216#endif
217#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
218#  define HAVE_MEMCPY
219#endif
220#ifdef HAVE_MEMCPY
221#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
222#    define zmemcpy _fmemcpy
223#    define zmemcmp _fmemcmp
224#    define zmemzero(dest, len) _fmemset(dest, 0, len)
225#  else
226#    define zmemcpy memcpy
227#    define zmemcmp memcmp
228#    define zmemzero(dest, len) memset(dest, 0, len)
229#  endif
230#else
231   void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
232   int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
233   void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
234#endif
235
236/* Diagnostic functions */
237#ifdef ZLIB_DEBUG
238#  include <stdio.h>
239   extern int ZLIB_INTERNAL z_verbose;
240   extern void ZLIB_INTERNAL z_error OF((char *m));
241#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
242#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
243#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
244#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
245#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
246#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
247#else
248#  define Assert(cond,msg)
249#  define Trace(x)
250#  define Tracev(x)
251#  define Tracevv(x)
252#  define Tracec(c,x)
253#  define Tracecv(c,x)
254#endif
255
256#ifndef Z_SOLO
257   voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
258                                    unsigned size));
259   void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
260#endif
261
262#define ZALLOC(strm, items, size) \
263           (*((strm)->zalloc))((strm)->opaque, (items), (size))
264#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
265#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
266
267/* Reverse the bytes in a 32-bit value */
268#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
269                    (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
270
271#endif /* ZUTIL_H */
272