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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 spatialys.com>
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_port.h"
#include "cpl_minizip_ioapi.h"
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include "cpl_minizip_ioapi.h"
#include "cpl_vsi.h"
#include "zconf.h"
#include "zlib.h"
static voidpf ZCALLBACK fopen_file_func(voidpf /* opaque */,
const char *filename, int mode)
{
VSILFILE *file = nullptr;
const char *mode_fopen = nullptr;
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 != nullptr)
return VSIFOpenExL(filename, mode_fopen, true);
}
if ((filename != nullptr) && (mode_fopen != nullptr))
file = VSIFOpenL(filename, mode_fopen);
return file;
}
static uLong ZCALLBACK fread_file_func(voidpf /* opaque */, voidpf stream,
void *buf, uLong size)
{
uLong ret = static_cast<uLong>(VSIFReadL(buf, 1, static_cast<size_t>(size),
static_cast<VSILFILE *>(stream)));
return ret;
}
static uLong ZCALLBACK fwrite_file_func(voidpf /* opaque */, voidpf stream,
const void *buf, uLong size)
{
uLong ret = static_cast<uLong>(VSIFWriteL(buf, 1, static_cast<size_t>(size),
static_cast<VSILFILE *>(stream)));
return ret;
}
static uLong64 ZCALLBACK ftell_file_func(voidpf /* opaque */, voidpf stream)
{
uLong64 ret;
ret = VSIFTellL(reinterpret_cast<VSILFILE *>(stream));
return ret;
}
static long ZCALLBACK fseek_file_func(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(reinterpret_cast<VSILFILE *>(stream), offset,
fseek_origin);
}
static int ZCALLBACK fclose_file_func(voidpf /* opaque */, voidpf stream)
{
return VSIFCloseL(reinterpret_cast<VSILFILE *>(stream));
}
static int ZCALLBACK ferror_file_func(voidpf /* opaque */, voidpf /* stream */)
{
// 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 = nullptr;
}
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