1/*
2 * Copyright (c) 2008 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* zutil.h -- internal interface and configuration of the compression library
29 * Copyright (C) 1995-2005 Jean-loup Gailly.
30 * For conditions of distribution and use, see copyright notice in zlib.h
31 */
32
33/* WARNING: this file should *not* be used by applications. It is
34   part of the implementation of the compression library and is
35   subject to change. Applications should only use zlib.h.
36 */
37
38/* @(#) $Id$ */
39
40#ifndef ZUTIL_H
41#define ZUTIL_H
42
43#define ZLIB_INTERNAL
44
45#if KERNEL
46#  include <libkern/zlib.h>
47#  include <string.h>
48#  ifndef NO_ERRNO_H
49#    define NO_ERRNO_H 1
50#  endif
51#  ifndef NO_ZCFUNCS
52#    define NO_ZCFUNCS 1
53#  endif
54#else
55#  include "zlib.h"
56#  ifdef STDC
57#    ifndef _WIN32_WCE
58#      include <stddef.h>
59#    endif
60#    include <string.h>
61#    include <stdlib.h>
62#  endif
63#endif /* KERNEL */
64
65#ifdef NO_ERRNO_H
66#   ifdef _WIN32_WCE
67      /* The Microsoft C Run-Time Library for Windows CE doesn't have
68       * errno.  We define it as a global variable to simplify porting.
69       * Its value is always 0 and should not be used.  We rename it to
70       * avoid conflict with other libraries that use the same workaround.
71       */
72#     define errno z_errno
73#   endif
74    extern int errno;
75#else
76#  ifndef _WIN32_WCE
77#    include <errno.h>
78#  endif
79#endif
80
81#ifndef local
82#  define local static
83#endif
84/* compile with -Dlocal if your debugger can't find static symbols */
85
86typedef unsigned char  uch;
87typedef uch FAR uchf;
88typedef unsigned short ush;
89typedef ush FAR ushf;
90typedef unsigned long  ulg;
91
92extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
93/* (size given to avoid silly warnings with Visual C++) */
94
95#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
96
97#define ERR_RETURN(strm,err) \
98  return (strm->msg = (char*)ERR_MSG(err), (err))
99/* To be used only when the state is known to be valid */
100
101        /* common constants */
102
103#ifndef DEF_WBITS
104#  define DEF_WBITS MAX_WBITS
105#endif
106/* default windowBits for decompression. MAX_WBITS is for compression only */
107
108#if MAX_MEM_LEVEL >= 8
109#  define DEF_MEM_LEVEL 8
110#else
111#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
112#endif
113/* default memLevel */
114
115#define STORED_BLOCK 0
116#define STATIC_TREES 1
117#define DYN_TREES    2
118/* The three kinds of block type */
119
120#define MIN_MATCH  3
121#define MAX_MATCH  258
122/* The minimum and maximum match lengths */
123
124#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
125
126        /* target dependencies */
127
128#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
129#  define OS_CODE  0x00
130#  if defined(__TURBOC__) || defined(__BORLANDC__)
131#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
132       /* Allow compilation with ANSI keywords only enabled */
133       void _Cdecl farfree( void *block );
134       void *_Cdecl farmalloc( unsigned long nbytes );
135#    else
136#      include <alloc.h>
137#    endif
138#  else /* MSC or DJGPP */
139#    include <malloc.h>
140#  endif
141#endif
142
143#ifdef AMIGA
144#  define OS_CODE  0x01
145#endif
146
147#if defined(VAXC) || defined(VMS)
148#  define OS_CODE  0x02
149#  define F_OPEN(name, mode) \
150     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
151#endif
152
153#if defined(ATARI) || defined(atarist)
154#  define OS_CODE  0x05
155#endif
156
157#ifdef OS2
158#  define OS_CODE  0x06
159#  ifdef M_I86
160     #include <malloc.h>
161#  endif
162#endif
163
164#if defined(MACOS) || defined(TARGET_OS_MAC)
165#  define OS_CODE  0x07
166#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
167#    include <unix.h> /* for fdopen */
168#  else
169#    ifndef fdopen
170#      define fdopen(fd,mode) NULL /* No fdopen() */
171#    endif
172#  endif
173#endif
174
175#ifdef TOPS20
176#  define OS_CODE  0x0a
177#endif
178
179#ifdef WIN32
180#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
181#    define OS_CODE  0x0b
182#  endif
183#endif
184
185#ifdef __50SERIES /* Prime/PRIMOS */
186#  define OS_CODE  0x0f
187#endif
188
189#if defined(_BEOS_) || defined(RISCOS)
190#  define fdopen(fd,mode) NULL /* No fdopen() */
191#endif
192
193#if KERNEL
194    typedef long ptrdiff_t;
195#elif (defined(_MSC_VER) && (_MSC_VER > 600))
196#  if defined(_WIN32_WCE)
197#    define fdopen(fd,mode) NULL /* No fdopen() */
198#    ifndef _PTRDIFF_T_DEFINED
199       typedef int ptrdiff_t;
200#      define _PTRDIFF_T_DEFINED
201#    endif
202#  else
203#    define fdopen(fd,type)  _fdopen(fd,type)
204#  endif
205#endif
206
207
208        /* common defaults */
209
210#ifndef OS_CODE
211#  define OS_CODE  0x03  /* assume Unix */
212#endif
213
214#ifndef F_OPEN
215#  define F_OPEN(name, mode) fopen((name), (mode))
216#endif
217
218         /* functions */
219
220#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
221#  ifndef HAVE_VSNPRINTF
222#    define HAVE_VSNPRINTF
223#  endif
224#endif
225#if defined(__CYGWIN__)
226#  ifndef HAVE_VSNPRINTF
227#    define HAVE_VSNPRINTF
228#  endif
229#endif
230#ifndef HAVE_VSNPRINTF
231#  ifdef MSDOS
232     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
233        but for now we just assume it doesn't. */
234#    define NO_vsnprintf
235#  endif
236#  ifdef __TURBOC__
237#    define NO_vsnprintf
238#  endif
239#  ifdef WIN32
240     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
241#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
242#      define vsnprintf _vsnprintf
243#    endif
244#  endif
245#  ifdef __SASC
246#    define NO_vsnprintf
247#  endif
248#endif
249#ifdef VMS
250#  define NO_vsnprintf
251#endif
252
253#if defined(pyr)
254#  define NO_MEMCPY
255#endif
256#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
257 /* Use our own functions for small and medium model with MSC <= 5.0.
258  * You may have to use the same strategy for Borland C (untested).
259  * The __SC__ check is for Symantec.
260  */
261#  define NO_MEMCPY
262#endif
263#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
264#  define HAVE_MEMCPY
265#endif
266#ifdef HAVE_MEMCPY
267#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
268#    define zmemcpy _fmemcpy
269#    define zmemcmp _fmemcmp
270#    define zmemzero(dest, len) _fmemset(dest, 0, len)
271#  else
272#    define zmemcpy memcpy
273#    define zmemcmp memcmp
274#    define zmemzero(dest, len) memset(dest, 0, len)
275#  endif
276#else
277   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
278   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
279   extern void zmemzero OF((Bytef* dest, uInt len));
280#endif
281
282/* Diagnostic functions */
283#if defined(DEBUG) && !defined(KERNEL)
284#  include <stdio.h>
285   extern int z_verbose;
286   extern void z_error    OF((char *m));
287#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
288#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
289#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
290#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
291#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
292#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
293#else
294#  define Assert(cond,msg)
295#  define Trace(x)
296#  define Tracev(x)
297#  define Tracevv(x)
298#  define Tracec(c,x)
299#  define Tracecv(c,x)
300#endif
301#undef DEBUG
302
303#ifndef NO_ZCFUNCS
304voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
305void   zcfree  OF((voidpf opaque, voidpf ptr));
306#endif /* NO_ZCFUNCS */
307
308#define ZALLOC(strm, items, size) \
309           (*((strm)->zalloc))((strm)->opaque, (items), (size))
310#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
311#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
312
313#endif /* ZUTIL_H */
314