/* ioapi.h -- IO base function header for compress/uncompress .zip
   part of the MiniZip project

   Copyright (C) 1998-2010 Gilles Vollant
     http://www.winimage.com/zLibDll/minizip.html
   Modifications for Zip64 support
     Copyright (C) 2009-2010 Mathias Svensson
     http://result42.com

   This program is distributed under the terms of the same license as zlib.
   See the accompanying LICENSE file for the full text of the license.
*/

#ifndef _ZLIBIOAPI64_H
#define _ZLIBIOAPI64_H

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

#include "zlib.h"

#if defined(USE_FILE32API)
#   define fopen64 fopen
#   define ftello64 ftell
#   define fseeko64 fseek
#else
#if defined(_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
#else
#   define fopen64 fopen
#   define ftello64 ftello
#   define fseeko64 fseeko
#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)     (voidpf opaque, const char *filename, int mode);
typedef voidpf   (ZCALLBACK *opendisk_file_func) (voidpf opaque, voidpf stream, uint32_t number_disk, int mode);
typedef uint32_t (ZCALLBACK *read_file_func)     (voidpf opaque, voidpf stream, void* buf, uint32_t size);
typedef uint32_t (ZCALLBACK *write_file_func)    (voidpf opaque, voidpf stream, const void *buf, uint32_t size);
typedef int      (ZCALLBACK *close_file_func)    (voidpf opaque, voidpf stream);
typedef int      (ZCALLBACK *error_file_func)    (voidpf opaque, voidpf stream);

typedef long     (ZCALLBACK *tell_file_func)     (voidpf opaque, voidpf stream);
typedef long     (ZCALLBACK *seek_file_func)     (voidpf opaque, voidpf stream, uint32_t 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;
    error_file_func     zerror_file;
    voidpf              opaque;
} zlib_filefunc_def;

typedef uint64_t (ZCALLBACK *tell64_file_func)    (voidpf opaque, voidpf stream);
typedef long     (ZCALLBACK *seek64_file_func)    (voidpf opaque, voidpf stream, uint64_t offset, int origin);
typedef voidpf   (ZCALLBACK *open64_file_func)    (voidpf opaque, const void *filename, int mode);
typedef voidpf   (ZCALLBACK *opendisk64_file_func)(voidpf opaque, voidpf stream, uint32_t 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;
    error_file_func      zerror_file;
    voidpf               opaque;
} zlib_filefunc64_def;

void fill_fopen_filefunc(zlib_filefunc_def *pzlib_filefunc_def);
void fill_fopen64_filefunc(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(const zlib_filefunc64_32_def *pfilefunc,const void*filename, int mode);
voidpf   call_zopendisk64(const zlib_filefunc64_32_def *pfilefunc, voidpf filestream, uint32_t number_disk, int mode);
long     call_zseek64(const zlib_filefunc64_32_def *pfilefunc, voidpf filestream, uint64_t offset, int origin);
uint64_t call_ztell64(const zlib_filefunc64_32_def *pfilefunc, voidpf filestream);

void fill_zlib_filefunc64_32_def_from_filefunc32(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
