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/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* $Id: zutil.h,v 1.4 1995/04/14 10:22:17 jloup Exp $ */
#ifndef _Z_UTIL_H
#define _Z_UTIL_H
#include "zlib.h"
#ifdef MSDOS
# include <stddef.h>
#else
extern int errno;
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
extern char *z_errmsg[]; /* indexed by 1-zlib_error */
#define ERR_RETURN(strm,err) return (strm->msg=z_errmsg[1-err], err)
/* To be used only when the state is known to be valid */
/* common constants */
#define DEFLATED 8
#ifndef WBITS
# define WBITS 15 /* 32K window */
#endif
#ifndef MEM_LEVEL
# define MEM_LEVEL 8
#endif
#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES 2
/* The three kinds of block type */
#define MIN_MATCH 3
#define MAX_MATCH 258
/* The minimum and maximum match lengths */
/* target dependencies */
#ifdef MSDOS
# define OS_CODE 0x00
# ifdef __TURBOC__
# include <alloc.h>
# define exit(n) _exit(n)
# else /* MSC */
# include <malloc.h>
# endif
#endif
#ifdef OS2
# define OS_CODE 0x06
#endif
#ifdef WIN32 /* Windows NT */
# define OS_CODE 0x0b
#endif
#if defined(VAXC) || defined(VMS)
# define OS_CODE 0x02
# define FOPEN(name, mode) \
fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif
#ifdef AMIGA
# define OS_CODE 0x01
#endif
#if defined(ATARI) || defined(atarist)
# define OS_CODE 0x05
#endif
#ifdef MACOS
# define OS_CODE 0x07
#endif
#ifdef __50SERIES /* Prime/PRIMOS */
# define OS_CODE 0x0F
#endif
#ifdef TOPS20
# define OS_CODE 0x0a
#endif
/* Common defaults */
#ifndef OS_CODE
# define OS_CODE 0x03 /* assume Unix */
#endif
#ifndef FOPEN
# define FOPEN(name, mode) fopen((name), (mode))
#endif
/* functions */
#ifdef HAVE_STRERROR
extern char *strerror __P((int));
# define zstrerror(errnum) strerror(errnum)
#else
# define zstrerror(errnum) ""
#endif
#if defined(__STDC__) && !defined(HAVE_MEMCPY)
# define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
# define zmemcpy memcpy
# define zmemzero(dest, len) memset(dest, 0, len)
#else
extern void zmemcpy __P((Byte* dest, Byte* source, uInt len));
extern void zmemzero __P((Byte* dest, uInt len));
#endif
/* Diagnostic functions */
#ifdef DEBUG
# include <stdio.h>
# ifndef verbose
# define verbose 0
# endif
# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
# define Trace(x) fprintf x
# define Tracev(x) {if (verbose) fprintf x ;}
# define Tracevv(x) {if (verbose>1) fprintf x ;}
# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
#else
# define Assert(cond,msg)
# define Trace(x)
# define Tracev(x)
# define Tracevv(x)
# define Tracec(c,x)
# define Tracecv(c,x)
#endif
extern void z_error __P((char *m));
voidp zcalloc __P((voidp opaque, unsigned items, unsigned size));
void zcfree __P((voidp opaque, voidp ptr));
#define ZALLOC(strm, items, size) (*strm->zalloc)(strm->opaque, items, size)
#define ZFREE(strm, addr) (*strm->zfree) (strm->opaque, (voidp)addr)
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
#endif /* _Z_UTIL_H */
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