/* ioapi.h -- IO base function header for compress/uncompress .zip
   part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )

   Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )

   Modifications for Zip64 support
   Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )

   For more info read MiniZip_info.txt

   Changes

   Oct-2009 - Defined ZPOS64_T to fpos_t on windows and u_int64_t on linux. (might need to find a better why for this)
   Oct-2009 - Change to fseeko64, ftello64 and fopen64 so large files would work on linux.
              More if/def section may be needed to support other platforms
   Oct-2009 - Defined fxxxx64 calls to normal fopen/ftell/fseek so they would compile on windows.
              (but you should use iowin32.c for windows instead)

*/

#ifndef _ZLIBIOAPI64_H
#define _ZLIBIOAPI64_H

#if (!defined(_WIN32)) && (!defined(WIN32)) && (!defined(__APPLE__))
    /* Linux needs this to support file operation on files larger then 4+GB
       But might need better if/def to select just the platforms that needs them. */
    #ifndef __USE_FILE_OFFSET64
        #define __USE_FILE_OFFSET64
    #endif
    #ifndef __USE_LARGEFILE64
        #define __USE_LARGEFILE64
    #endif
    #ifndef _LARGEFILE64_SOURCE
        #define _LARGEFILE64_SOURCE
    #endif
    #ifndef _FILE_OFFSET_BIT
        #define _FILE_OFFSET_BIT 64
    #endif
#endif

#include <stdio.h>
#include <stdlib.h>
#include "zlib.h"

#if defined(USE_FILE32API)
#define fopen64 fopen
#define ftello64 ftell
#define fseeko64 fseek
#else
#ifdef __FreeBSD__
#define fopen64 fopen
#define ftello64 ftello
#define fseeko64 fseeko
#endif
#ifdef _MSC_VER
    #define fopen64 fopen
    #if (_MSC_VER >= 1400) && (!(defined(NO_MSCVER_FILE64_FUNC)))
        #define ftello64 _ftelli64
        #define fseeko64 _fseeki64
    #else // old MSC
        #define ftello64 ftell
        #define fseeko64 fseek
    #endif
#endif
#endif

/* a type choosen by DEFINE */
#ifdef HAVE_64BIT_INT_CUSTOM
typedef  64BIT_INT_CUSTOM_TYPE ZPOS64_T;
#else
#ifdef HAS_STDINT_H
#include "stdint.h"
typedef uint64_t ZPOS64_T;
#else

#if defined(_MSC_VER) || defined(__BORLANDC__)
typedef unsigned __int64 ZPOS64_T;
#else
typedef unsigned long long int ZPOS64_T;
#endif
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

#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(_WIN32) || defined (WINDOWS) || \
         defined (_WINDOWS)) && defined(CALLBACK) && defined (USEWINDOWS_CALLBACK)
        #define ZCALLBACK CALLBACK
    #else
        #define ZCALLBACK
    #endif
#endif

typedef voidpf   (ZCALLBACK *open_file_func)      OF((voidpf opaque, const char* filename, int mode));
typedef voidpf   (ZCALLBACK *opendisk_file_func)  OF((voidpf opaque, voidpf stream, int number_disk, 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 int      (ZCALLBACK *close_file_func)     OF((voidpf opaque, voidpf stream));
typedef int      (ZCALLBACK *testerror_file_func) OF((voidpf opaque, voidpf stream));

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));

/* here is the "old" 32 bits structure structure */
typedef struct zlib_filefunc_def_s
{
    open_file_func      zopen_file;
    opendisk_file_func  zopendisk_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;

typedef ZPOS64_T (ZCALLBACK *tell64_file_func)    OF((voidpf opaque, voidpf stream));
typedef long     (ZCALLBACK *seek64_file_func)    OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
typedef voidpf   (ZCALLBACK *open64_file_func)    OF((voidpf opaque, const void* filename, int mode));
typedef voidpf   (ZCALLBACK *opendisk64_file_func)OF((voidpf opaque, voidpf stream, int number_disk, int mode));

typedef struct zlib_filefunc64_def_s
{
    open64_file_func     zopen64_file;
    opendisk64_file_func zopendisk64_file;
    read_file_func       zread_file;
    write_file_func      zwrite_file;
    tell64_file_func     ztell64_file;
    seek64_file_func     zseek64_file;
    close_file_func      zclose_file;
    testerror_file_func  zerror_file;
    voidpf               opaque;
} zlib_filefunc64_def;

void fill_fopen_filefunc OF((zlib_filefunc_def* pzlib_filefunc_def));
void fill_fopen64_filefunc OF((zlib_filefunc64_def* pzlib_filefunc_def));

/* now internal definition, only for zip.c and unzip.h */
typedef struct zlib_filefunc64_32_def_s
{
    zlib_filefunc64_def zfile_func64;
    open_file_func      zopen32_file;
    opendisk_file_func  zopendisk32_file;
    tell_file_func      ztell32_file;
    seek_file_func      zseek32_file;
} zlib_filefunc64_32_def;

#define ZREAD64(filefunc,filestream,buf,size)       ((*((filefunc).zfile_func64.zread_file))        ((filefunc).zfile_func64.opaque,filestream,buf,size))
#define ZWRITE64(filefunc,filestream,buf,size)      ((*((filefunc).zfile_func64.zwrite_file))       ((filefunc).zfile_func64.opaque,filestream,buf,size))
//#define ZTELL64(filefunc,filestream)                ((*((filefunc).ztell64_file))                   ((filefunc).opaque,filestream))
//#define ZSEEK64(filefunc,filestream,pos,mode)       ((*((filefunc).zseek64_file))                   ((filefunc).opaque,filestream,pos,mode))
#define ZCLOSE64(filefunc,filestream)               ((*((filefunc).zfile_func64.zclose_file))       ((filefunc).zfile_func64.opaque,filestream))
#define ZERROR64(filefunc,filestream)               ((*((filefunc).zfile_func64.zerror_file))       ((filefunc).zfile_func64.opaque,filestream))

voidpf   call_zopen64 OF((const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode));
voidpf   call_zopendisk64 OF((const zlib_filefunc64_32_def* pfilefunc, voidpf filestream, int number_disk, int mode));
long     call_zseek64 OF((const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin));
ZPOS64_T call_ztell64 OF((const zlib_filefunc64_32_def* pfilefunc,voidpf filestream));

void fill_zlib_filefunc64_32_def_from_filefunc32 OF((zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32));

#define ZOPEN64(filefunc,filename,mode)             (call_zopen64((&(filefunc)),(filename),(mode)))
#define ZOPENDISK64(filefunc,filestream,diskn,mode) (call_zopendisk64((&(filefunc)),(filestream),(diskn),(mode)))
#define ZTELL64(filefunc,filestream)                (call_ztell64((&(filefunc)),(filestream)))
#define ZSEEK64(filefunc,filestream,pos,mode)       (call_zseek64((&(filefunc)),(filestream),(pos),(mode)))

#ifdef __cplusplus
}
#endif

#endif
