www.pudn.com > 200410111032011273DESMD5ZLIB算法源代码.rar > Zutil.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. 
*/ 
#ifndef _Z_UTIL_H 
#define _Z_UTIL_H 
 
#include "zlib.h" 
 
#include  
#include  
#include  
#include  
 
/* compile with -Dlocal if your debugger can't find static symbols */ 
 
extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */ 
/* (size given to avoid silly warnings with Visual C++) */ 
 
#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 
 
#define ERR_RETURN(strm,err) \ 
  return (strm->msg = (char*)ERR_MSG(err), (err)) 
/* To be used only when the state is known to be valid */ 
 
        /* common constants */ 
 
#define DEF_WBITS MAX_WBITS 
/* default windowBits for decompression. MAX_WBITS is for compression only */ 
 
/*#if MAX_MEM_LEVEL >= 8 
#   define DEF_MEM_LEVEL 8 
#else*/ 
#define DEF_MEM_LEVEL  MAX_MEM_LEVEL 
//#endif 
/* default memLevel */ 
 
#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 */ 
 
#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 
 
       /* functions */ 
typedef unsigned long (*check_func)(unsigned long check, const BYTE *buf, 
				       unsigned int len); 
void *zcalloc(void *opaque, unsigned items, unsigned size); 
void   zcfree (void *opaque, void *ptr); 
 
#define ZALLOC(strm, items, size) \ 
           (*((strm)->zalloc))((strm)->opaque, (items), (size)) 
#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (void *)(addr)) 
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 
 
#endif /* _Z_UTIL_H */