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/* ioapi.h -- IO base function header for compress/uncompress .zip

   files using zlib + zip or unzip API

   Version 1.01e, February 12th, 2005

   Copyright (C) 1998-2005 Gilles Vollant

*/

#ifndef _ZLIBIOAPI_H

#define _ZLIBIOAPI_H

#define ZLIB_FILEFUNC_SEEK_CUR (1)

#define ZLIB_FILEFUNC_SEEK_END (2)

#define ZLIB_FILEFUNC_SEEK_SET (0)

#define ZLIB_FILEFUNC_MODE_READ      (1)

#define ZLIB_FILEFUNC_MODE_WRITE     (2)

#define ZLIB_FILEFUNC_MODE_READWRITEFILTER (3)

#define ZLIB_FILEFUNC_MODE_EXISTING (4)

#define ZLIB_FILEFUNC_MODE_CREATE   (8)

#ifndef ZCALLBACK

#if (defined(WIN32) || defined (WINDOWS) || defined (_WINDOWS)) && defined(CALLBACK) && defined (USEWINDOWS_CALLBACK)

#define ZCALLBACK CALLBACK

#else

#define ZCALLBACK

#endif

#endif

#ifdef __cplusplus

extern "C" {

#endif

typedef voidpf (ZCALLBACK *open_file_func) OF((voidpf opaque, const char* filename, int mode));

typedef uLong  (ZCALLBACK *read_file_func) OF((voidpf opaque, voidpf stream, void* buf, uLong size));

typedef uLong  (ZCALLBACK *write_file_func) OF((voidpf opaque, voidpf stream, const void* buf, uLong size));

typedef long   (ZCALLBACK *tell_file_func) OF((voidpf opaque, voidpf stream));

typedef long   (ZCALLBACK *seek_file_func) OF((voidpf opaque, voidpf stream, uLong offset, int origin));

typedef int    (ZCALLBACK *close_file_func) OF((voidpf opaque, voidpf stream));

typedef int    (ZCALLBACK *testerror_file_func) OF((voidpf opaque, voidpf stream));

typedef struct zlib_filefunc_def_s

{

    open_file_func      zopen_file;

    read_file_func      zread_file;

    write_file_func     zwrite_file;

    tell_file_func      ztell_file;

    seek_file_func      zseek_file;

    close_file_func     zclose_file;

    testerror_file_func zerror_file;

    voidpf              opaque;

} zlib_filefunc_def;

void fill_fopen_filefunc OF((zlib_filefunc_def* pzlib_filefunc_def));

#define ZREAD(filefunc,filestream,buf,size) ((*((filefunc).zread_file))((filefunc).opaque,filestream,buf,size))

#define ZWRITE(filefunc,filestream,buf,size) ((*((filefunc).zwrite_file))((filefunc).opaque,filestream,buf,size))

#define ZTELL(filefunc,filestream) ((*((filefunc).ztell_file))((filefunc).opaque,filestream))

#define ZSEEK(filefunc,filestream,pos,mode) ((*((filefunc).zseek_file))((filefunc).opaque,filestream,pos,mode))

#define ZCLOSE(filefunc,filestream) ((*((filefunc).zclose_file))((filefunc).opaque,filestream))

#define ZERROR(filefunc,filestream) ((*((filefunc).zerror_file))((filefunc).opaque,filestream))

#ifdef __cplusplus

}

#endif

#endif