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
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.
17 # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
19 # define ZLIB_INTERNAL
24 #if defined(STDC) && !defined(Z_SOLO)
25 # if !(defined(_WIN32_WCE) && defined(_MSC_VER))
33 #ifndef _PTRDIFF_T_DECLARED
34 typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */
35 #define _PTRDIFF_T_DECLARED
42 /* since "static" is used to mean two completely different things in C, we
43 define "local" for the non-static meaning of "static", for readability
44 (compile with -Dlocal if your debugger can't find static symbols) */
46 typedef unsigned char uch;
48 typedef unsigned short ush;
50 typedef unsigned long ulg;
52 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
53 /* (size given to avoid silly warnings with Visual C++) */
55 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
57 #define ERR_RETURN(strm,err) \
58 return (strm->msg = ERR_MSG(err), (err))
59 /* To be used only when the state is known to be valid */
61 /* common constants */
64 # define DEF_WBITS MAX_WBITS
66 /* default windowBits for decompression. MAX_WBITS is for compression only */
68 #if MAX_MEM_LEVEL >= 8
69 # define DEF_MEM_LEVEL 8
71 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
73 /* default memLevel */
75 #define STORED_BLOCK 0
76 #define STATIC_TREES 1
78 /* The three kinds of block type */
82 /* The minimum and maximum match lengths */
84 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
86 /* target dependencies */
88 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
91 # if defined(__TURBOC__) || defined(__BORLANDC__)
92 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
93 /* Allow compilation with ANSI keywords only enabled */
94 void _Cdecl farfree( void *block );
95 void *_Cdecl farmalloc( unsigned long nbytes );
99 # else /* MSC or DJGPP */
109 #if defined(VAXC) || defined(VMS)
111 # define F_OPEN(name, mode) \
112 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
116 # if __TARGET_LIB__ < 0x20000000
118 # elif __TARGET_LIB__ < 0x40000000
125 #if defined(ATARI) || defined(atarist)
131 # if defined(M_I86) && !defined(Z_SOLO)
136 #if defined(MACOS) || defined(TARGET_OS_MAC)
139 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
140 # include <unix.h> /* for fdopen */
143 # define fdopen(fd,mode) NULL /* No fdopen() */
153 #if defined(WIN32) && !defined(__CYGWIN__)
169 #if defined(_BEOS_) || defined(RISCOS)
170 # define fdopen(fd,mode) NULL /* No fdopen() */
173 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
174 # if defined(_WIN32_WCE)
175 # define fdopen(fd,mode) NULL /* No fdopen() */
176 # ifndef _PTRDIFF_T_DEFINED
177 typedef int ptrdiff_t;
178 # define _PTRDIFF_T_DEFINED
181 # define fdopen(fd,type) _fdopen(fd,type)
185 #if defined(__BORLANDC__) && !defined(MSDOS)
191 /* provide prototypes for these when building zlib without LFS */
192 #if !defined(_WIN32) && \
193 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
194 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
195 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
198 /* common defaults */
201 # define OS_CODE 3 /* assume Unix */
205 # define F_OPEN(name, mode) fopen((name), (mode))
210 #if defined(pyr) || defined(Z_SOLO)
213 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
214 /* Use our own functions for small and medium model with MSC <= 5.0.
215 * You may have to use the same strategy for Borland C (untested).
216 * The __SC__ check is for Symantec.
220 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
224 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
225 # define zmemcpy _fmemcpy
226 # define zmemcmp _fmemcmp
227 # define zmemzero(dest, len) _fmemset(dest, 0, len)
229 # define zmemcpy memcpy
230 # define zmemcmp memcmp
231 # define zmemzero(dest, len) memset(dest, 0, len)
234 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
235 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
236 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
239 /* Diagnostic functions */
242 extern int ZLIB_INTERNAL z_verbose;
243 extern void ZLIB_INTERNAL z_error OF((char *m));
244 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
245 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
246 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
247 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
248 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
249 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
251 # define Assert(cond,msg)
256 # define Tracecv(c,x)
260 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
262 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
265 #define ZALLOC(strm, items, size) \
266 (*((strm)->zalloc))((strm)->opaque, (items), (size))
267 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
268 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
270 /* Reverse the bytes in a 32-bit value */
271 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
272 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))