tdesktop/Telegram/SourceFiles/storage/serialize_common.h

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#pragma once
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#include "mtproto/mtproto_auth_key.h"
#include "base/bytes.h"
#include <QtCore/QDataStream>
namespace Serialize {
inline int stringSize(const QString &str) {
return sizeof(quint32) + str.size() * sizeof(ushort);
}
inline int bytearraySize(const QByteArray &arr) {
return sizeof(quint32) + arr.size();
}
inline int bytesSize(bytes::const_span bytes) {
return sizeof(quint32) + bytes.size();
}
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inline int colorSize() {
return sizeof(quint32);
}
void writeColor(QDataStream &stream, const QColor &color);
QColor readColor(QDataStream &stream);
struct ReadBytesVectorWrap {
bytes::vector &bytes;
};
inline ReadBytesVectorWrap bytes(bytes::vector &bytes) {
return ReadBytesVectorWrap { bytes };
}
// Compatible with QDataStream &operator>>(QDataStream &, QByteArray &);
inline QDataStream &operator>>(QDataStream &stream, ReadBytesVectorWrap data) {
auto &bytes = data.bytes;
bytes.clear();
quint32 len;
stream >> len;
if (stream.status() != QDataStream::Ok || len == 0xFFFFFFFF) {
return stream;
}
constexpr auto kStep = quint32(1024 * 1024);
for (auto allocated = quint32(0); allocated < len;) {
auto blockSize = qMin(kStep, len - allocated);
bytes.resize(allocated + blockSize);
if (stream.readRawData(reinterpret_cast<char*>(bytes.data()) + allocated, blockSize) != blockSize) {
bytes.clear();
stream.setStatus(QDataStream::ReadPastEnd);
return stream;
}
allocated += blockSize;
}
return stream;
}
struct WriteBytesWrap {
bytes::const_span bytes;
};
inline WriteBytesWrap bytes(bytes::const_span bytes) {
return WriteBytesWrap { bytes };
}
inline QDataStream &operator<<(QDataStream &stream, WriteBytesWrap data) {
auto bytes = data.bytes;
if (bytes.empty()) {
stream << quint32(0xFFFFFFFF);
} else {
auto size = quint32(bytes.size());
stream << size;
stream.writeRawData(reinterpret_cast<const char*>(bytes.data()), size);
}
return stream;
}
inline QDataStream &operator<<(QDataStream &stream, ReadBytesVectorWrap data) {
return stream << WriteBytesWrap { data.bytes };
}
inline int dateTimeSize() {
return (sizeof(qint64) + sizeof(quint32) + sizeof(qint8));
}
template <typename T>
inline T read(QDataStream &stream) {
auto result = T();
stream >> result;
return result;
}
template <>
inline MTP::AuthKey::Data read<MTP::AuthKey::Data>(QDataStream &stream) {
auto result = MTP::AuthKey::Data();
stream.readRawData(reinterpret_cast<char*>(result.data()), result.size());
return result;
}
} // namespace Serialize