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/*****************************************************************************
* Copyright 2013 - 2015 Yichao Yu <yyc1992@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 2.1 of the *
* License, or (at your option) version 3, or any later version accepted *
* by the membership of KDE e.V. (or its successor approved by the *
* membership of KDE e.V.), which shall act as a proxy defined in *
* Section 6 of 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library. If not, *
* see <http://www.gnu.org/licenses/>. *
*****************************************************************************/
#include <config.h>
#include "log.h"
#include "strs.h"
#include "map.h"
#include <unistd.h>
#include <stdarg.h>
#ifdef QTC_ENABLE_BACKTRACE
#include <execinfo.h>
#endif
namespace QtCurve {
QTC_EXPORT void
backtrace()
{
#ifdef QTC_ENABLE_BACKTRACE
void *buff[1024];
size_t size = ::backtrace(buff, 1024);
::backtrace_symbols_fd(buff, size, STDERR_FILENO);
#endif
}
namespace Log {
QTC_EXPORT LogLevel
level()
{
static LogLevel _level = [] () -> LogLevel {
const char *env_debug = getenv("QTCURVE_DEBUG");
if (Str::convert(env_debug, false)) {
return LogLevel::Debug;
}
static const StrMap<LogLevel, false> level_map{
{"debug", LogLevel::Debug},
{"info", LogLevel::Info},
{"warning", LogLevel::Warn},
{"warn", LogLevel::Warn},
{"error", LogLevel::Error}
};
LogLevel res = level_map.search(getenv("QTCURVE_LEVEL"),
LogLevel::Error);
if (Str::convert(env_debug, true) && res <= LogLevel::Debug) {
return LogLevel::Info;
}
return res;
}();
return _level;
}
static bool
useColor()
{
static bool color = [] () -> bool {
const char *env_color = getenv("QTCURVE_LOG_COLOR");
if (Str::convert(env_color, false)) {
return true;
} else if (!Str::convert(env_color, true)) {
return false;
} else if (isatty(2)) {
return true;
} else {
return false;
}
}();
return color;
}
QTC_EXPORT void
logv(LogLevel _level, const char *fname, int line, const char *func,
const char *fmt, va_list ap)
{
QTC_RET_IF_FAIL(_level >= level() && ((int)_level) >= 0 &&
_level <= LogLevel::Force);
static const char *color_codes[] = {
[(int)LogLevel::Debug] = "\e[01;32m",
[(int)LogLevel::Info] = "\e[01;34m",
[(int)LogLevel::Warn] = "\e[01;33m",
[(int)LogLevel::Error] = "\e[01;31m",
[(int)LogLevel::Force] = "\e[01;35m",
};
static const char *log_prefixes[] = {
[(int)LogLevel::Debug] = "qtcDebug-",
[(int)LogLevel::Info] = "qtcInfo-",
[(int)LogLevel::Warn] = "qtcWarn-",
[(int)LogLevel::Error] = "qtcError-",
[(int)LogLevel::Force] = "qtcLog-",
};
const char *color_prefix = (useColor() ? color_codes[(int)_level] : "");
const char *log_prefix = log_prefixes[(int)_level];
fprintf(stderr, "%s%s%d (%s:%d) %s ", color_prefix, log_prefix, getpid(),
fname, line, func);
vfprintf(stderr, fmt, ap);
if (useColor()) {
fwrite("\e[0m", strlen("\e[0m"), 1, stderr);
}
}
QTC_EXPORT void
log(LogLevel _level, const char *fname, int line, const char *func,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
logv(_level, fname, line, func, fmt, ap);
va_end(ap);
}
}
}
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