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metaforce/metaforce-gui/quazip/quazip/qioapi.cpp

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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 <QtCore/QIODevice>
#include "quazip_qt_compat.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 call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,voidpf file,int mode)
{
if (pfilefunc->zfile_func64.zopen64_file != nullptr)
return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,file,mode);
else
{
return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,file,mode);
}
}
int call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
{
if (pfilefunc->zfile_func64.zseek64_file != nullptr)
return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
else
{
uLong offsetTruncated = (uLong)offset;
if (offsetTruncated != offset)
return -1;
else
return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
}
}
ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
{
if (pfilefunc->zfile_func64.zseek64_file != nullptr)
return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
else
{
uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
if ((tell_uLong) == ((uLong)-1))
return (ZPOS64_T)-1;
else
return tell_uLong;
}
}
/// @cond internal
struct QIODevice_descriptor {
// Position only used for writing to sequential devices.
qint64 pos;
inline QIODevice_descriptor():
pos(0)
{}
};
/// @endcond
voidpf ZCALLBACK qiodevice_open_file_func (
voidpf opaque,
voidpf file,
int mode)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
QIODevice *iodevice = reinterpret_cast<QIODevice*>(file);
QIODevice::OpenMode desiredMode;
if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
desiredMode = QIODevice::ReadOnly;
else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
desiredMode = QIODevice::ReadWrite;
else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
desiredMode = QIODevice::WriteOnly;
if (iodevice->isOpen()) {
if ((iodevice->openMode() & desiredMode) == desiredMode) {
if (desiredMode != QIODevice::WriteOnly
&& iodevice->isSequential()) {
// We can use sequential devices only for writing.
delete d;
return nullptr;
} else {
if ((desiredMode & QIODevice::WriteOnly) != 0) {
// open for writing, need to seek existing device
if (!iodevice->isSequential()) {
iodevice->seek(0);
} else {
d->pos = iodevice->pos();
}
}
}
return iodevice;
} else {
delete d;
return nullptr;
}
}
iodevice->open(desiredMode);
if (iodevice->isOpen()) {
if (desiredMode != QIODevice::WriteOnly && iodevice->isSequential()) {
// We can use sequential devices only for writing.
iodevice->close();
delete d;
return nullptr;
} else {
return iodevice;
}
} else {
delete d;
return nullptr;
}
}
uLong ZCALLBACK qiodevice_read_file_func (
voidpf opaque,
voidpf stream,
void* buf,
uLong size)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
qint64 ret64 = iodevice->read((char*)buf,size);
uLong ret;
ret = (uLong) ret64;
if (ret64 != -1) {
d->pos += ret64;
}
return ret;
}
uLong ZCALLBACK qiodevice_write_file_func (
voidpf opaque,
voidpf stream,
const void* buf,
uLong size)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
uLong ret;
qint64 ret64 = iodevice->write((char*)buf,size);
if (ret64 != -1) {
d->pos += ret64;
}
ret = (uLong) ret64;
return ret;
}
uLong ZCALLBACK qiodevice_tell_file_func (
voidpf opaque,
voidpf stream)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
uLong ret;
qint64 ret64;
if (iodevice->isSequential()) {
ret64 = d->pos;
} else {
ret64 = iodevice->pos();
}
ret = static_cast<uLong>(ret64);
return ret;
}
ZPOS64_T ZCALLBACK qiodevice64_tell_file_func (
voidpf opaque,
voidpf stream)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
qint64 ret;
if (iodevice->isSequential()) {
ret = d->pos;
} else {
ret = iodevice->pos();
}
return static_cast<ZPOS64_T>(ret);
}
int ZCALLBACK qiodevice_seek_file_func (
voidpf /*opaque UNUSED*/,
voidpf stream,
uLong offset,
int origin)
{
QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
if (iodevice->isSequential()) {
if (origin == ZLIB_FILEFUNC_SEEK_END
&& offset == 0) {
// sequential devices are always at end (needed in mdAppend)
return 0;
} else {
qWarning("qiodevice_seek_file_func() called for sequential device");
return -1;
}
}
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 = !iodevice->seek(qiodevice_seek_result);
return ret;
}
int ZCALLBACK qiodevice64_seek_file_func (
voidpf /*opaque UNUSED*/,
voidpf stream,
ZPOS64_T offset,
int origin)
{
QIODevice *iodevice = reinterpret_cast<QIODevice*>(stream);
if (iodevice->isSequential()) {
if (origin == ZLIB_FILEFUNC_SEEK_END
&& offset == 0) {
// sequential devices are always at end (needed in mdAppend)
return 0;
} else {
qWarning("qiodevice_seek_file_func() called for sequential device");
return -1;
}
}
qint64 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 = !iodevice->seek(qiodevice_seek_result);
return ret;
}
int ZCALLBACK qiodevice_close_file_func (
voidpf opaque,
voidpf stream)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
delete d;
QIODevice *device = reinterpret_cast<QIODevice*>(stream);
return quazip_close(device) ? 0 : -1;
}
int ZCALLBACK qiodevice_fakeclose_file_func (
voidpf opaque,
voidpf /*stream*/)
{
QIODevice_descriptor *d = reinterpret_cast<QIODevice_descriptor*>(opaque);
delete d;
return 0;
}
int ZCALLBACK qiodevice_error_file_func (
voidpf /*opaque UNUSED*/,
voidpf /*stream UNUSED*/)
{
// 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 = new QIODevice_descriptor;
}
void fill_qiodevice64_filefunc (
zlib_filefunc64_def* pzlib_filefunc_def)
{
// Open functions are the same for Qt.
pzlib_filefunc_def->zopen64_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->ztell64_file = qiodevice64_tell_file_func;
pzlib_filefunc_def->zseek64_file = qiodevice64_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 = new QIODevice_descriptor;
pzlib_filefunc_def->zfakeclose_file = qiodevice_fakeclose_file_func;
}
void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
{
p_filefunc64_32->zfile_func64.zopen64_file = nullptr;
p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
p_filefunc64_32->zfile_func64.ztell64_file = nullptr;
p_filefunc64_32->zfile_func64.zseek64_file = nullptr;
p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
p_filefunc64_32->zfile_func64.zfakeclose_file = nullptr;
p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
}
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