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0001 /*****************************************************************************
0002  *   Copyright 2013 - 2015 Yichao Yu <yyc1992@gmail.com>                     *
0003  *                                                                           *
0004  *   This program is free software; you can redistribute it and/or modify    *
0005  *   it under the terms of the GNU Lesser General Public License as          *
0006  *   published by the Free Software Foundation; either version 2.1 of the    *
0007  *   License, or (at your option) version 3, or any later version accepted   *
0008  *   by the membership of KDE e.V. (or its successor approved by the         *
0009  *   membership of KDE e.V.), which shall act as a proxy defined in          *
0010  *   Section 6 of version 3 of the license.                                  *
0011  *                                                                           *
0012  *   This program is distributed in the hope that it will be useful,         *
0013  *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
0014  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU       *
0015  *   Lesser General Public License for more details.                         *
0016  *                                                                           *
0017  *   You should have received a copy of the GNU Lesser General Public        *
0018  *   License along with this library. If not,                                *
0019  *   see <http://www.gnu.org/licenses/>.                                     *
0020  *****************************************************************************/
0021 
0022 #ifndef _QTC_UTILS_LOG_H_
0023 #define _QTC_UTILS_LOG_H_
0024 
0025 #include "utils.h"
0026 #include <stdarg.h>
0027 
0028 namespace QtCurve {
0029 
0030 void backtrace();
0031 enum class LogLevel {
0032     Debug,
0033     Info,
0034     Warn,
0035     Error,
0036     Force
0037 };
0038 
0039 namespace Log {
0040 
0041 LogLevel level();
0042 
0043 __attribute__((format(printf, 5, 0)))
0044 void logv(LogLevel level, const char *fname, int line,
0045           const char *func, const char *fmt, va_list ap);
0046 
0047 __attribute__((format(printf, 5, 6)))
0048 void log(LogLevel level, const char *fname, int line, const char *func,
0049          const char *fmt, ...);
0050 
0051 static inline bool
0052 checkLevel(LogLevel _level)
0053 {
0054     return qtcUnlikely(_level <= LogLevel::Force && _level >= level());
0055 }
0056 
0057 }
0058 }
0059 
0060 #define qtcLog(__level, fmt, args...)                                   \
0061     do {                                                                \
0062         using namespace QtCurve;                                        \
0063         LogLevel level = (__level);                                     \
0064         if (!Log::checkLevel(level)) {                                  \
0065             break;                                                      \
0066         }                                                               \
0067         Log::log(level, __FILE__, __LINE__, __FUNCTION__, fmt, ##args); \
0068     } while (0)
0069 
0070 #define qtcDebug(fmt, args...) qtcLog(LogLevel::Debug, fmt, ##args)
0071 #define qtcInfo(fmt, args...) qtcLog(LogLevel::Info, fmt, ##args)
0072 #define qtcWarn(fmt, args...) qtcLog(LogLevel::Warn, fmt, ##args)
0073 #define qtcError(fmt, args...) qtcLog(LogLevel::Error, fmt, ##args)
0074 #define qtcForceLog(fmt, args...) qtcLog(LogLevel::Force, fmt, ##args)
0075 
0076 #endif