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Diffstat (limited to 'src/corelib/global/qlogging.h')
| -rw-r--r-- | src/corelib/global/qlogging.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/corelib/global/qlogging.h b/src/corelib/global/qlogging.h new file mode 100644 index 0000000000..c6edc7bc48 --- /dev/null +++ b/src/corelib/global/qlogging.h @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore/qglobal.h> + +#ifndef QLOGGING_H +#define QLOGGING_H + +#if 0 +// header is automatically included in qglobal.h +#pragma qt_no_master_include +#endif + +QT_BEGIN_HEADER +QT_BEGIN_NAMESPACE + +/* + Forward declarations only. + + In order to use the qDebug() stream, you must #include<QDebug> +*/ +class QDebug; +class QNoDebug; + +enum QtMsgType { QtDebugMsg, QtWarningMsg, QtCriticalMsg, QtFatalMsg, QtSystemMsg = QtCriticalMsg }; + +class QMessageLogContext +{ + Q_DISABLE_COPY(QMessageLogContext) +public: + QMessageLogContext() : version(1), line(0), file(0), function(0) {} + Q_DECL_CONSTEXPR QMessageLogContext(const char *file, int line, const char *function) + : version(1), line(line), file(file), function(function) {} + + int version; + int line; + const char *file; + const char *function; + +private: + friend class QMessageLogger; + friend class QDebug; +}; + +class Q_CORE_EXPORT QMessageLogger +{ + Q_DISABLE_COPY(QMessageLogger) +public: + QMessageLogger() : context() {} + Q_DECL_CONSTEXPR QMessageLogger(const char *file, int line, const char *function) + : context(file, line, function) {} + + void debug(const char *msg, ...) +#if defined(Q_CC_GNU) && !defined(__INSURE__) + __attribute__ ((format (printf, 2, 3))) +#endif + ; + void noDebug(const char *, ...) +#if defined(Q_CC_GNU) && !defined(__INSURE__) + __attribute__ ((format (printf, 2, 3))) +#endif + {} + void warning(const char *msg, ...) +#if defined(Q_CC_GNU) && !defined(__INSURE__) + __attribute__ ((format (printf, 2, 3))) +#endif + ; + void critical(const char *msg, ...) +#if defined(Q_CC_GNU) && !defined(__INSURE__) + __attribute__ ((format (printf, 2, 3))) +#endif + ; + void fatal(const char *msg, ...) +#if defined(Q_CC_GNU) && !defined(__INSURE__) + __attribute__ ((format (printf, 2, 3))) +#endif + ; + +#ifndef QT_NO_DEBUG_STREAM + QDebug debug(); + QDebug warning(); + QDebug critical(); + + QNoDebug noDebug(); +#endif // QT_NO_DEBUG_STREAM + +private: + QMessageLogContext context; +}; + +Q_CORE_EXPORT void qt_message_output(QtMsgType, const QMessageLogContext &context, const char *buf); + +/* + qDebug, qWarning, qCritical, qFatal are redefined to automatically include context information + */ +#define qDebug QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).debug +#define qWarning QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).warning +#define qCritical QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).critical +#define qFatal QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).fatal + +#define QT_NO_QDEBUG_MACRO while (false) QMessageLogger().noDebug +#define QT_NO_QWARNING_MACRO while (false) QMessageLogger().noDebug + +#ifdef QT_NO_DEBUG_OUTPUT +# undef qDebug +# define qDebug QT_NO_QDEBUG_MACRO +#endif +#ifdef QT_NO_WARNING_OUTPUT +# undef qWarning +# define qWarning QT_NO_QWARNING_MACRO +#endif + +// deprecated. Use qInstallMessageHandler instead! +typedef void (*QtMsgHandler)(QtMsgType, const char *); +Q_CORE_EXPORT QtMsgHandler qInstallMsgHandler(QtMsgHandler); + +typedef void (*QMessageHandler)(QtMsgType, const QMessageLogContext &, const char *); +Q_CORE_EXPORT QMessageHandler qInstallMessageHandler(QMessageHandler); + +QT_END_HEADER +QT_END_NAMESPACE + +#endif // QLOGGING_H |