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/***********************************************************************
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 * Software License Agreement (BSD License)
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 *
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 * Copyright 2008-2009  Marius Muja ([email protected]). All rights reserved.
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 * Copyright 2008-2009  David G. Lowe ([email protected]). All rights reserved.
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 *
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 * THE BSD LICENSE
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *************************************************************************/
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#ifndef _OPENCV_LOGGER_H_
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#define _OPENCV_LOGGER_H_
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#include <cstdio>
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#include <stdarg.h>
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#include "opencv2/flann/general.h"
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using namespace std;
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namespace cvflann
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{
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class CV_EXPORTS Logger
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{
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    FILE* stream;
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    int logLevel;
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public:
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    Logger() : stream(stdout), logLevel(LOG_WARN) {};
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    ~Logger()
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    {
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        if (stream!=NULL && stream!=stdout) {
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            fclose(stream);
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        }
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    }
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    void setDestination(const char* name)
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    {
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        if (name==NULL) {
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            stream = stdout;
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        }
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        else {
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            stream = fopen(name,"w");
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            if (stream == NULL) {
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                stream = stdout;
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            }
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        }
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    }
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    void setLevel(int level) { logLevel = level; }
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    int log(int level, const char* fmt, ...);
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    int log(int level, const char* fmt, va_list arglist);
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    int fatal(const char* fmt, ...);
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    int error(const char* fmt, ...);
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    int warn(const char* fmt, ...);
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    int info(const char* fmt, ...);
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};
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CV_EXPORTS Logger& logger();
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} // namespace cvflann
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#endif //_OPENCV_LOGGER_H_