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204 lines
4.8 KiB
C
204 lines
4.8 KiB
C
/* zutil.h -- internal interface and configuration of the compression library
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* Copyright (C) 1995-1996 Jean-loup Gailly.
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* WARNING: this file should *not* be used by applications. It is
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part of the implementation of the compression library and is
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subject to change. Applications should only use zlib.h.
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*/
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/* $Id$ */
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#ifndef _Z_UTIL_H
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#define _Z_UTIL_H
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#include "zlib.h"
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#if defined(MSDOS)||defined(VMS)||defined(CRAY)||defined(WIN32)||defined(RISCOS)
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# include <stddef.h>
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# include <errno.h>
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#else
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extern int errno;
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#endif
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#ifdef STDC
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# include <string.h>
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# include <stdlib.h>
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#endif
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#ifndef local
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# define local static
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#endif
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/* compile with -Dlocal if your debugger can't find static symbols */
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typedef unsigned char uch;
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typedef uch FAR uchf;
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typedef unsigned short ush;
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typedef ush FAR ushf;
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typedef unsigned long ulg;
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extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
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/* (size given to avoid silly warnings with Visual C++) */
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#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
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#define ERR_RETURN(strm,err) \
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return (strm->msg = (char*)ERR_MSG(err), (err))
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/* To be used only when the state is known to be valid */
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/* common constants */
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#ifndef DEF_WBITS
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# define DEF_WBITS MAX_WBITS
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#endif
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/* default windowBits for decompression. MAX_WBITS is for compression only */
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#if MAX_MEM_LEVEL >= 8
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# define DEF_MEM_LEVEL 8
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#else
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# define DEF_MEM_LEVEL MAX_MEM_LEVEL
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#endif
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/* default memLevel */
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#define STORED_BLOCK 0
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#define STATIC_TREES 1
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#define DYN_TREES 2
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/* The three kinds of block type */
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#define MIN_MATCH 3
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#define MAX_MATCH 258
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/* The minimum and maximum match lengths */
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#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
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/* target dependencies */
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#ifdef MSDOS
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# define OS_CODE 0x00
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# ifdef __TURBOC__
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# include <alloc.h>
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# else /* MSC or DJGPP */
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# include <malloc.h>
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# endif
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#endif
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#ifdef OS2
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# define OS_CODE 0x06
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#endif
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#ifdef WIN32 /* Window 95 & Windows NT */
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# define OS_CODE 0x0b
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#endif
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#if defined(VAXC) || defined(VMS)
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# define OS_CODE 0x02
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# define FOPEN(name, mode) \
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fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
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#endif
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#ifdef AMIGA
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# define OS_CODE 0x01
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#endif
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#if defined(ATARI) || defined(atarist)
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# define OS_CODE 0x05
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#endif
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#ifdef MACOS
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# define OS_CODE 0x07
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#endif
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#ifdef __50SERIES /* Prime/PRIMOS */
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# define OS_CODE 0x0F
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#endif
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#ifdef TOPS20
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# define OS_CODE 0x0a
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#endif
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#if defined(_BEOS_) || defined(RISCOS)
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# define fdopen(fd,mode) NULL /* No fdopen() */
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#endif
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/* Common defaults */
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#ifndef OS_CODE
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# define OS_CODE 0x03 /* assume Unix */
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#endif
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#ifndef FOPEN
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# define FOPEN(name, mode) fopen((name), (mode))
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#endif
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/* functions */
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#ifdef HAVE_STRERROR
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extern char *strerror OF((int));
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# define zstrerror(errnum) strerror(errnum)
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#else
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# define zstrerror(errnum) ""
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#endif
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#if defined(pyr)
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# define NO_MEMCPY
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#endif
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#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(_MSC_VER)
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/* Use our own functions for small and medium model with MSC <= 5.0.
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* You may have to use the same strategy for Borland C (untested).
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*/
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# define NO_MEMCPY
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#endif
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#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
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# define HAVE_MEMCPY
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#endif
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#ifdef HAVE_MEMCPY
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# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
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# define zmemcpy _fmemcpy
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# define zmemcmp _fmemcmp
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# define zmemzero(dest, len) _fmemset(dest, 0, len)
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# else
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# define zmemcpy memcpy
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# define zmemcmp memcmp
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# define zmemzero(dest, len) memset(dest, 0, len)
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# endif
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#else
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extern void zmemcpy OF((Bytef* dest, Bytef* source, uInt len));
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extern int zmemcmp OF((Bytef* s1, Bytef* s2, uInt len));
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extern void zmemzero OF((Bytef* dest, uInt len));
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#endif
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/* Diagnostic functions */
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#ifdef DEBUG
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# include <stdio.h>
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# ifndef verbose
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# define verbose 0
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# endif
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extern void z_error OF((char *m));
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# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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# define Trace(x) fprintf x
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# define Tracev(x) {if (verbose) fprintf x ;}
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# define Tracevv(x) {if (verbose>1) fprintf x ;}
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# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
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# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
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#else
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# define Assert(cond,msg)
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# define Trace(x)
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# define Tracev(x)
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# define Tracevv(x)
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# define Tracec(c,x)
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# define Tracecv(c,x)
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#endif
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typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len));
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voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
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void zcfree OF((voidpf opaque, voidpf ptr));
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#define ZALLOC(strm, items, size) \
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(*((strm)->zalloc))((strm)->opaque, (items), (size))
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#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
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#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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#endif /* _Z_UTIL_H */
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