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/***********************************************************************
* Software License Agreement (BSD License)
*
* Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
* Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
*
* THE BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*************************************************************************/
#ifndef OPENCV_FLANN_LOGGER_H
#define OPENCV_FLANN_LOGGER_H
#include <stdio.h>
#include <stdarg.h>
#include "defines.h"
namespace cvflann
{
class Logger
{
Logger() : stream(stdout), logLevel(FLANN_LOG_WARN) {}
~Logger()
{
if ((stream!=NULL)&&(stream!=stdout)) {
fclose(stream);
}
}
static Logger& instance()
{
static Logger logger;
return logger;
}
void _setDestination(const char* name)
{
if (name==NULL) {
stream = stdout;
}
else {
stream = fopen(name,"w");
if (stream == NULL) {
stream = stdout;
}
}
}
int _log(int level, const char* fmt, va_list arglist)
{
if (level > logLevel ) return -1;
int ret = vfprintf(stream, fmt, arglist);
return ret;
}
public:
/**
* Sets the logging level. All messages with lower priority will be ignored.
* @param level Logging level
*/
static void setLevel(int level) { instance().logLevel = level; }
/**
* Sets the logging destination
* @param name Filename or NULL for console
*/
static void setDestination(const char* name) { instance()._setDestination(name); }
/**
* Print log message
* @param level Log level
* @param fmt Message format
* @return
*/
static int log(int level, const char* fmt, ...)
{
va_list arglist;
va_start(arglist, fmt);
int ret = instance()._log(level,fmt,arglist);
va_end(arglist);
return ret;
}
#define LOG_METHOD(NAME,LEVEL) \
static int NAME(const char* fmt, ...) \
{ \
va_list ap; \
va_start(ap, fmt); \
int ret = instance()._log(LEVEL, fmt, ap); \
va_end(ap); \
return ret; \
}
LOG_METHOD(fatal, FLANN_LOG_FATAL)
LOG_METHOD(error, FLANN_LOG_ERROR)
LOG_METHOD(warn, FLANN_LOG_WARN)
LOG_METHOD(info, FLANN_LOG_INFO)
private:
FILE* stream;
int logLevel;
};
}
#endif //OPENCV_FLANN_LOGGER_H
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