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/* Modified version by Even Rouault. :
- change fill_fopen_filefunc to cpl_fill_fopen_filefunc
- port to VSIL*L API
- Remove old C style function prototypes
- Add support for ZIP64
* Copyright (c) 2008-2010, Even Rouault <even dot rouault at mines-paris dot org>
Original licence available in port/LICENCE_minizip
*/
/* 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 "cpl_vsi.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "zlib.h"
#include "cpl_minizip_ioapi.h"
static
voidpf ZCALLBACK fopen_file_func (CPL_UNUSED voidpf opaque, const char* filename, int mode)
{
VSILFILE* 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 = VSIFOpenL(filename, mode_fopen);
return file;
}
static
uLong ZCALLBACK fread_file_func (CPL_UNUSED voidpf opaque, voidpf stream, void* buf, uLong size)
{
uLong ret;
ret = (uLong)VSIFReadL(buf, 1, (size_t)size, (VSILFILE *)stream);
return ret;
}
static
uLong ZCALLBACK fwrite_file_func (CPL_UNUSED voidpf opaque, voidpf stream, const void* buf, uLong size)
{
uLong ret;
ret = (uLong)VSIFWriteL(buf, 1, (size_t)size, (VSILFILE *)stream);
return ret;
}
static
uLong64 ZCALLBACK ftell_file_func (CPL_UNUSED voidpf opaque, voidpf stream)
{
uLong64 ret;
ret = VSIFTellL((VSILFILE *)stream);
return ret;
}
static
long ZCALLBACK fseek_file_func (CPL_UNUSED voidpf opaque, voidpf stream, uLong64 offset, int origin)
{
int fseek_origin=0;
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;
}
return VSIFSeekL((VSILFILE *)stream, offset, fseek_origin);
}
static
int ZCALLBACK fclose_file_func (CPL_UNUSED voidpf opaque, voidpf stream)
{
return VSIFCloseL((VSILFILE *)stream);
}
static
int ZCALLBACK ferror_file_func (CPL_UNUSED voidpf opaque,
CPL_UNUSED voidpf stream)
{
// int ret;
// ret = 0; // FIXME
//ret = ferror((FILE *)stream);
return 0;
}
void cpl_fill_fopen_filefunc (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;
}
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