tdesktop/Telegram/SourceFiles/codegen/common/logging.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
#include <QtCore/QString>
#include <iostream>
namespace codegen {
namespace common {
// Common error codes.
constexpr int kErrorFileNotFound = 101;
constexpr int kErrorFileTooLarge = 102;
constexpr int kErrorFileNotOpened = 103;
constexpr int kErrorUnexpectedEndOfFile = 104;
// Wrapper around std::ostream that adds '\n' to the end of the logging line.
class LogStream {
public:
enum NullType {
Null,
};
explicit LogStream(NullType) : final_(false) {
}
explicit LogStream(std::ostream &stream) : stream_(&stream) {
}
LogStream(LogStream &&other) : stream_(other.stream_), final_(other.final_) {
other.final_ = false;
}
std::ostream *stream() const {
return stream_;
}
~LogStream() {
if (final_) {
*stream_ << '\n';
}
}
private:
std::ostream *stream_ = nullptr;
bool final_ = true;
};
template <typename T>
LogStream operator<<(LogStream &&stream, T &&value) {
if (auto ostream = stream.stream()) {
*ostream << std::forward<T>(value);
}
return std::forward<LogStream>(stream);
}
// Outputs file name, line number and error code to std::err. Usage:
// logError(kErrorFileTooLarge, filepath) << "file too large, size=" << size;
LogStream logError(int code, const QString &filepath, int line = 0);
void logSetWorkingPath(const QString &workingpath);
static constexpr int kErrorInternal = 666;
} // namespace common
} // namespace codegen