1 /* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2005 Jean-loup Gailly.
3 * For conditions of distribution and use, see copyright notice in zlib.h
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.
18 #include <cyg/compress/zlib.h>
19 #include <cyg/crc/crc.h>
21 #define crc32 cyg_ether_crc32_accumulate
35 /* The Microsoft C Run-Time Library for Windows CE doesn't have
36 * errno. We define it as a global variable to simplify porting.
37 * Its value is always 0 and should not be used. We rename it to
38 * avoid conflict with other libraries that use the same workaround.
40 # define errno z_errno
52 /* compile with -Dlocal if your debugger can't find static symbols */
54 typedef unsigned char uch;
56 typedef unsigned short ush;
58 typedef unsigned long ulg;
60 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
61 /* (size given to avoid silly warnings with Visual C++) */
63 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
65 #define ERR_RETURN(strm,err) \
66 return (strm->msg = (char*)ERR_MSG(err), (err))
67 /* To be used only when the state is known to be valid */
69 /* common constants */
72 # define DEF_WBITS MAX_WBITS
74 /* default windowBits for decompression. MAX_WBITS is for compression only */
76 #if MAX_MEM_LEVEL >= 8
77 # define DEF_MEM_LEVEL 8
79 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
81 /* default memLevel */
83 #define STORED_BLOCK 0
84 #define STATIC_TREES 1
86 /* The three kinds of block type */
90 /* The minimum and maximum match lengths */
92 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
94 /* target dependencies */
96 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
98 # if defined(__TURBOC__) || defined(__BORLANDC__)
99 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
100 /* Allow compilation with ANSI keywords only enabled */
101 void _Cdecl farfree( void *block );
102 void *_Cdecl farmalloc( unsigned long nbytes );
106 # else /* MSC or DJGPP */
112 # define OS_CODE 0x01
115 #if defined(VAXC) || defined(VMS)
116 # define OS_CODE 0x02
117 # define F_OPEN(name, mode) \
118 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
121 #if defined(ATARI) || defined(atarist)
122 # define OS_CODE 0x05
126 # define OS_CODE 0x06
132 #if defined(MACOS) || defined(TARGET_OS_MAC)
133 # define OS_CODE 0x07
134 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
135 # include <unix.h> /* for fdopen */
138 # define fdopen(fd,mode) NULL /* No fdopen() */
144 # define OS_CODE 0x0a
148 # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
149 # define OS_CODE 0x0b
153 #ifdef __50SERIES /* Prime/PRIMOS */
154 # define OS_CODE 0x0f
157 #if defined(_BEOS_) || defined(RISCOS)
158 # define fdopen(fd,mode) NULL /* No fdopen() */
161 #if (defined(_MSC_VER) && (_MSC_VER > 600))
162 # if defined(_WIN32_WCE)
163 # define fdopen(fd,mode) NULL /* No fdopen() */
164 # ifndef _PTRDIFF_T_DEFINED
165 typedef int ptrdiff_t;
166 # define _PTRDIFF_T_DEFINED
169 # define fdopen(fd,type) _fdopen(fd,type)
173 /* common defaults */
176 # define OS_CODE 0x03 /* assume Unix */
180 # define F_OPEN(name, mode) fopen((name), (mode))
185 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
186 # ifndef HAVE_VSNPRINTF
187 # define HAVE_VSNPRINTF
190 #if defined(__CYGWIN__)
191 # ifndef HAVE_VSNPRINTF
192 # define HAVE_VSNPRINTF
195 #ifndef HAVE_VSNPRINTF
197 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
198 but for now we just assume it doesn't. */
199 # define NO_vsnprintf
202 # define NO_vsnprintf
205 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
206 # if !defined(vsnprintf) && !defined(NO_vsnprintf)
207 # define vsnprintf _vsnprintf
211 # define NO_vsnprintf
215 # define NO_vsnprintf
221 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
222 /* Use our own functions for small and medium model with MSC <= 5.0.
223 * You may have to use the same strategy for Borland C (untested).
224 * The __SC__ check is for Symantec.
228 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
232 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
233 # define zmemcpy _fmemcpy
234 # define zmemcmp _fmemcmp
235 # define zmemzero(dest, len) _fmemset(dest, 0, len)
237 # define zmemcpy memcpy
238 # define zmemcmp memcmp
239 # define zmemzero(dest, len) memset(dest, 0, len)
242 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
243 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
244 extern void zmemzero OF((Bytef* dest, uInt len));
247 /* Diagnostic functions */
250 extern int z_verbose;
251 extern void z_error OF((char *m));
252 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
253 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
254 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
255 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
256 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
257 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
259 # define Assert(cond,msg)
264 # define Tracecv(c,x)
268 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
269 void zcfree OF((voidpf opaque, voidpf ptr));
271 #define ZALLOC(strm, items, size) \
272 (*((strm)->zalloc))((strm)->opaque, (items), (size))
273 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
274 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}