usbloadergx/source/unzip/ioapi.c

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/* ioapi.c -- 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
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zlib.h"
#include "ioapi.h"
/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
#ifndef SEEK_CUR
#define SEEK_CUR 1
#endif
#ifndef SEEK_END
#define SEEK_END 2
#endif
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
voidpf ZCALLBACK fopen_file_func OF( (
voidpf opaque,
const char* filename,
int mode ) );
uLong ZCALLBACK fread_file_func OF( (
voidpf opaque,
voidpf stream,
void* buf,
uLong size ) );
uLong ZCALLBACK fwrite_file_func OF( (
voidpf opaque,
voidpf stream,
const void* buf,
uLong size ) );
long ZCALLBACK ftell_file_func OF( (
voidpf opaque,
voidpf stream ) );
long ZCALLBACK fseek_file_func OF( (
voidpf opaque,
voidpf stream,
uLong offset,
int origin ) );
int ZCALLBACK fclose_file_func OF( (
voidpf opaque,
voidpf stream ) );
int ZCALLBACK ferror_file_func OF( (
voidpf opaque,
voidpf stream ) );
voidpf ZCALLBACK fopen_file_func ( opaque, filename, mode )
voidpf opaque;
const char* filename;
int mode;
{
FILE* file = NULL;
const char* mode_fopen = NULL;
if ( ( mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER ) == ZLIB_FILEFUNC_MODE_READ )
mode_fopen = "rb";
else if ( mode & ZLIB_FILEFUNC_MODE_EXISTING )
mode_fopen = "r+b";
else if ( mode & ZLIB_FILEFUNC_MODE_CREATE )
mode_fopen = "wb";
if ( ( filename != NULL ) && ( mode_fopen != NULL ) )
file = fopen( filename, mode_fopen );
return file;
}
uLong ZCALLBACK fread_file_func ( opaque, stream, buf, size )
voidpf opaque;
voidpf stream;
void* buf;
uLong size;
{
uLong ret;
ret = ( uLong )fread( buf, 1, ( size_t )size, ( FILE * )stream );
return ret;
}
uLong ZCALLBACK fwrite_file_func ( opaque, stream, buf, size )
voidpf opaque;
voidpf stream;
const void* buf;
uLong size;
{
uLong ret;
ret = ( uLong )fwrite( buf, 1, ( size_t )size, ( FILE * )stream );
return ret;
}
long ZCALLBACK ftell_file_func ( opaque, stream )
voidpf opaque;
voidpf stream;
{
long ret;
ret = ftell( ( FILE * )stream );
return ret;
}
long ZCALLBACK fseek_file_func ( opaque, stream, offset, origin )
voidpf opaque;
voidpf stream;
uLong offset;
int origin;
{
int fseek_origin = 0;
long ret;
switch ( origin )
{
case ZLIB_FILEFUNC_SEEK_CUR :
fseek_origin = SEEK_CUR;
break;
case ZLIB_FILEFUNC_SEEK_END :
fseek_origin = SEEK_END;
break;
case ZLIB_FILEFUNC_SEEK_SET :
fseek_origin = SEEK_SET;
break;
default:
return -1;
}
ret = 0;
fseek( ( FILE * )stream, offset, fseek_origin );
return ret;
}
int ZCALLBACK fclose_file_func ( opaque, stream )
voidpf opaque;
voidpf stream;
{
int ret;
ret = fclose( ( FILE * )stream );
return ret;
}
int ZCALLBACK ferror_file_func ( opaque, stream )
voidpf opaque;
voidpf stream;
{
int ret;
ret = ferror( ( FILE * )stream );
return ret;
}
void fill_fopen_filefunc ( pzlib_filefunc_def )
zlib_filefunc_def* pzlib_filefunc_def;
{
pzlib_filefunc_def->zopen_file = fopen_file_func;
pzlib_filefunc_def->zread_file = fread_file_func;
pzlib_filefunc_def->zwrite_file = fwrite_file_func;
pzlib_filefunc_def->ztell_file = ftell_file_func;
pzlib_filefunc_def->zseek_file = fseek_file_func;
pzlib_filefunc_def->zclose_file = fclose_file_func;
pzlib_filefunc_def->zerror_file = ferror_file_func;
pzlib_filefunc_def->opaque = NULL;
}