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/*
* Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 or (at your option)
* version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Endian.h"
#include <QtCore/QtEndian>
#include <QtCore/QIODevice>
namespace Endian
{
qint16 bytesToInt16(const QByteArray& ba, QSysInfo::Endian byteOrder)
{
Q_ASSERT(ba.size() == 2);
if (byteOrder == QSysInfo::LittleEndian) {
return qFromLittleEndian<qint16>(reinterpret_cast<const uchar*>(ba.constData()));
}
else {
return qFromBigEndian<qint16>(reinterpret_cast<const uchar*>(ba.constData()));
}
}
qint32 bytesToInt32(const QByteArray& ba, QSysInfo::Endian byteOrder)
{
Q_ASSERT(ba.size() == 4);
if (byteOrder == QSysInfo::LittleEndian) {
return qFromLittleEndian<qint32>(reinterpret_cast<const uchar*>(ba.constData()));
}
else {
return qFromBigEndian<qint32>(reinterpret_cast<const uchar*>(ba.constData()));
}
}
qint64 bytesToInt64(const QByteArray& ba, QSysInfo::Endian byteOrder)
{
Q_ASSERT(ba.size() == 8);
if (byteOrder == QSysInfo::LittleEndian) {
return qFromLittleEndian<qint64>(reinterpret_cast<const uchar*>(ba.constData()));
}
else {
return qFromBigEndian<qint64>(reinterpret_cast<const uchar*>(ba.constData()));
}
}
quint16 bytesToUInt16(const QByteArray& ba, QSysInfo::Endian byteOrder)
{
return bytesToInt16(ba, byteOrder);
}
quint32 bytesToUInt32(const QByteArray& ba, QSysInfo::Endian byteOrder)
{
return bytesToInt32(ba, byteOrder);
}
quint64 bytesToUInt64(const QByteArray& ba, QSysInfo::Endian byteOrder)
{
return bytesToInt64(ba, byteOrder);
}
qint16 readInt16(QIODevice* device, QSysInfo::Endian byteOrder, bool* ok)
{
QByteArray ba = device->read(2);
if (ba.size() != 2) {
*ok = false;
return 0;
}
else {
*ok = true;
return bytesToUInt16(ba, byteOrder);
}
}
qint32 readInt32(QIODevice* device, QSysInfo::Endian byteOrder, bool* ok)
{
QByteArray ba = device->read(4);
if (ba.size() != 4) {
*ok = false;
return 0;
}
else {
*ok = true;
return bytesToUInt32(ba, byteOrder);
}
}
qint64 readInt64(QIODevice* device, QSysInfo::Endian byteOrder, bool* ok)
{
QByteArray ba = device->read(8);
if (ba.size() != 8) {
*ok = false;
return 0;
}
else {
*ok = true;
return bytesToUInt64(ba, byteOrder);
}
}
quint16 readUInt16(QIODevice* device, QSysInfo::Endian byteOrder, bool* ok)
{
return readInt16(device, byteOrder, ok);
}
quint32 readUInt32(QIODevice* device, QSysInfo::Endian byteOrder, bool* ok)
{
return readInt32(device, byteOrder, ok);
}
quint64 readUInt64(QIODevice* device, QSysInfo::Endian byteOrder, bool* ok)
{
return readInt64(device, byteOrder, ok);
}
QByteArray int16ToBytes(qint16 num, QSysInfo::Endian byteOrder)
{
QByteArray ba;
ba.resize(2);
if (byteOrder == QSysInfo::LittleEndian) {
qToLittleEndian<qint16>(num, reinterpret_cast<uchar*>(ba.data()));
}
else {
qToBigEndian<qint64>(num, reinterpret_cast<uchar*>(ba.data()));
}
return ba;
}
QByteArray int32ToBytes(qint32 num, QSysInfo::Endian byteOrder)
{
QByteArray ba;
ba.resize(4);
if (byteOrder == QSysInfo::LittleEndian) {
qToLittleEndian<qint32>(num, reinterpret_cast<uchar*>(ba.data()));
}
else {
qToBigEndian<qint32>(num, reinterpret_cast<uchar*>(ba.data()));
}
return ba;
}
QByteArray int64ToBytes(qint64 num, QSysInfo::Endian byteOrder)
{
QByteArray ba;
ba.resize(8);
if (byteOrder == QSysInfo::LittleEndian) {
qToLittleEndian<qint64>(num, reinterpret_cast<uchar*>(ba.data()));
}
else {
qToBigEndian<qint64>(num, reinterpret_cast<uchar*>(ba.data()));
}
return ba;
}
bool writeInt16(qint16 num, QIODevice* device, QSysInfo::Endian byteOrder)
{
QByteArray ba = int16ToBytes(num, byteOrder);
int bytesWritten = device->write(ba);
return (bytesWritten == ba.size());
}
bool writeInt32(qint32 num, QIODevice* device, QSysInfo::Endian byteOrder)
{
QByteArray ba = int32ToBytes(num, byteOrder);
int bytesWritten = device->write(ba);
return (bytesWritten == ba.size());
}
bool writeInt64(qint64 num, QIODevice* device, QSysInfo::Endian byteOrder)
{
QByteArray ba = int64ToBytes(num, byteOrder);
int bytesWritten = device->write(ba);
return (bytesWritten == ba.size());
}
} // namespace Endian
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