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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
Modified by Sergey A. Tachenov to integrate with Qt.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zlib.h"
#include "ioapi.h"
#include "quazip_global.h"
#include <QIODevice>
/* 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 qiodevice_open_file_func (
voidpf opaque UNUSED,
voidpf file,
int mode)
{
QIODevice *iodevice = reinterpret_cast<QIODevice*>(file);
if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
iodevice->open(QIODevice::ReadOnly);
else
if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
iodevice->open(QIODevice::ReadWrite);
else
if (mode & ZLIB_FILEFUNC_MODE_CREATE)
iodevice->open(QIODevice::WriteOnly);
if (iodevice->isOpen()) {
if (iodevice->isSequential()) {
iodevice->close();
return NULL;
} else {
return iodevice;
}
} else
return NULL;
}
uLong ZCALLBACK qiodevice_read_file_func (
voidpf opaque UNUSED,
voidpf stream,
void* buf,
uLong size)
{
uLong ret;
ret = (uLong)((QIODevice*)stream)->read((char*)buf,size);
return ret;
}
uLong ZCALLBACK qiodevice_write_file_func (
voidpf opaque UNUSED,
voidpf stream,
const void* buf,
uLong size)
{
uLong ret;
ret = (uLong)((QIODevice*)stream)->write((char*)buf,size);
return ret;
}
uLong ZCALLBACK qiodevice_tell_file_func (
voidpf opaque UNUSED,
voidpf stream)
{
uLong ret;
ret = ((QIODevice*)stream)->pos();
return ret;
}
int ZCALLBACK qiodevice_seek_file_func (
voidpf opaque UNUSED,
voidpf stream,
uLong offset,
int origin)
{
uLong qiodevice_seek_result=0;
int ret;
switch (origin)
{
case ZLIB_FILEFUNC_SEEK_CUR :
qiodevice_seek_result = ((QIODevice*)stream)->pos() + offset;
break;
case ZLIB_FILEFUNC_SEEK_END :
qiodevice_seek_result = ((QIODevice*)stream)->size() - offset;
break;
case ZLIB_FILEFUNC_SEEK_SET :
qiodevice_seek_result = offset;
break;
default: return -1;
}
ret = !((QIODevice*)stream)->seek(qiodevice_seek_result);
return ret;
}
int ZCALLBACK qiodevice_close_file_func (
voidpf opaque UNUSED,
voidpf stream)
{
((QIODevice*)stream)->close();
return 0;
}
int ZCALLBACK qiodevice_error_file_func (
voidpf opaque UNUSED,
voidpf stream)
{
// can't check for error due to the QIODevice API limitation
return 0;
}
void fill_qiodevice_filefunc (
zlib_filefunc_def* pzlib_filefunc_def)
{
pzlib_filefunc_def->zopen_file = qiodevice_open_file_func;
pzlib_filefunc_def->zread_file = qiodevice_read_file_func;
pzlib_filefunc_def->zwrite_file = qiodevice_write_file_func;
pzlib_filefunc_def->ztell_file = qiodevice_tell_file_func;
pzlib_filefunc_def->zseek_file = qiodevice_seek_file_func;
pzlib_filefunc_def->zclose_file = qiodevice_close_file_func;
pzlib_filefunc_def->zerror_file = qiodevice_error_file_func;
pzlib_filefunc_def->opaque = NULL;
}
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