1 /* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2004 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.
26 /* The Microsoft C Run-Time Library for Windows CE doesn't have
27 * errno. We define it as a global variable to simplify porting.
28 * Its value is always 0 and should not be used. We rename it to
29 * avoid conflict with other libraries that use the same workaround.
31 # define errno z_errno
41 /* compile with -Dlocal if your debugger can't find static symbols */
43 typedef unsigned char uch;
45 typedef unsigned short ush;
47 typedef unsigned long ulg;
49 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
50 /* (size given to avoid silly warnings with Visual C++) */
52 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
54 #define ERR_RETURN(strm,err) \
55 return (strm->msg = (char*)ERR_MSG(err), (err))
56 /* To be used only when the state is known to be valid */
58 /* common constants */
61 # define DEF_WBITS MAX_WBITS
63 /* default windowBits for decompression. MAX_WBITS is for compression only */
65 #if MAX_MEM_LEVEL >= 8
66 # define DEF_MEM_LEVEL 8
68 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
70 /* default memLevel */
72 #define STORED_BLOCK 0
73 #define STATIC_TREES 1
75 /* The three kinds of block type */
79 /* The minimum and maximum match lengths */
81 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
83 /* target dependencies */
85 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
87 # if defined(__TURBOC__) || defined(__BORLANDC__)
88 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
89 /* Allow compilation with ANSI keywords only enabled */
90 void _Cdecl farfree( void *block );
91 void *_Cdecl farmalloc( unsigned long nbytes );
95 # else /* MSC or DJGPP */
101 # define OS_CODE 0x01
104 #if defined(VAXC) || defined(VMS)
105 # define OS_CODE 0x02
106 # define F_OPEN(name, mode) \
107 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
110 #if defined(ATARI) || defined(atarist)
111 # define OS_CODE 0x05
115 # define OS_CODE 0x06
118 #if defined(MACOS) || defined(TARGET_OS_MAC)
119 # define OS_CODE 0x07
120 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
121 # include <unix.h> /* for fdopen */
124 # define fdopen(fd,mode) NULL /* No fdopen() */
130 # define OS_CODE 0x0a
134 # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
135 # define OS_CODE 0x0b
139 #ifdef __50SERIES /* Prime/PRIMOS */
140 # define OS_CODE 0x0f
143 #if defined(_BEOS_) || defined(RISCOS)
144 # define fdopen(fd,mode) NULL /* No fdopen() */
147 #if (defined(_MSC_VER) && (_MSC_VER > 600))
148 # if defined(_WIN32_WCE)
149 # define fdopen(fd,mode) NULL /* No fdopen() */
150 # ifndef _PTRDIFF_T_DEFINED
151 typedef int ptrdiff_t;
152 # define _PTRDIFF_T_DEFINED
155 # define fdopen(fd,type) _fdopen(fd,type)
159 /* common defaults */
162 # define OS_CODE 0x03 /* assume Unix */
166 # define F_OPEN(name, mode) fopen((name), (mode))
171 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
172 # ifndef HAVE_VSNPRINTF
173 # define HAVE_VSNPRINTF
176 #if defined(__CYGWIN__)
177 # ifndef HAVE_VSNPRINTF
178 # define HAVE_VSNPRINTF
181 #ifndef HAVE_VSNPRINTF
183 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
184 but for now we just assume it doesn't. */
185 # define NO_vsnprintf
188 # define NO_vsnprintf
191 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
192 # if !defined(vsnprintf) && !defined(NO_vsnprintf)
193 # define vsnprintf _vsnprintf
197 # define NO_vsnprintf
201 # define NO_vsnprintf
207 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
208 /* Use our own functions for small and medium model with MSC <= 5.0.
209 * You may have to use the same strategy for Borland C (untested).
210 * The __SC__ check is for Symantec.
214 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
218 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
219 # define zmemcpy _fmemcpy
220 # define zmemcmp _fmemcmp
221 # define zmemzero(dest, len) _fmemset(dest, 0, len)
223 # define zmemcpy memcpy
224 # define zmemcmp memcmp
225 # define zmemzero(dest, len) memset(dest, 0, len)
228 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
229 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
230 extern void zmemzero OF((Bytef* dest, uInt len));
233 /* Diagnostic functions */
236 extern int z_verbose;
237 extern void z_error OF((char *m));
238 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
239 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
240 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
241 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
242 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
243 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
245 # define Assert(cond,msg)
250 # define Tracecv(c,x)
254 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
255 void zcfree OF((voidpf opaque, voidpf ptr));
257 #define ZALLOC(strm, items, size) \
258 (*((strm)->zalloc))((strm)->opaque, (items), (size))
259 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
260 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}