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include/opencv2/flann/logger.h

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00001 /***********************************************************************
00002  * Software License Agreement (BSD License)
00003  *
00004  * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
00005  * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
00006  *
00007  * THE BSD LICENSE
00008  *
00009  * Redistribution and use in source and binary forms, with or without
00010  * modification, are permitted provided that the following conditions
00011  * are met:
00012  *
00013  * 1. Redistributions of source code must retain the above copyright
00014  *    notice, this list of conditions and the following disclaimer.
00015  * 2. Redistributions in binary form must reproduce the above copyright
00016  *    notice, this list of conditions and the following disclaimer in the
00017  *    documentation and/or other materials provided with the distribution.
00018  *
00019  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00020  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00021  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00022  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00023  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00024  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00025  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00026  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00027  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00028  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029  *************************************************************************/
00030 
00031 #ifndef _OPENCV_LOGGER_H_
00032 #define _OPENCV_LOGGER_H_
00033 
00034 #include <cstdio>
00035 #include <stdarg.h>
00036 
00037 namespace cvflann
00038 {
00039     
00040 enum flann_log_level_t {
00041     FLANN_LOG_NONE = 0,
00042     FLANN_LOG_FATAL = 1,
00043     FLANN_LOG_ERROR = 2,
00044     FLANN_LOG_WARN = 3,
00045     FLANN_LOG_INFO = 4
00046 };
00047     
00048 class CV_EXPORTS Logger
00049 {
00050     FILE* stream;
00051     int logLevel;
00052 
00053 public:
00054 
00055     Logger() : stream(stdout), logLevel(FLANN_LOG_WARN) {};
00056 
00057     ~Logger()
00058     {
00059         if (stream!=NULL && stream!=stdout) {
00060             fclose(stream);
00061         }
00062     }
00063 
00064     void setDestination(const char* name)
00065     {
00066         if (name==NULL) {
00067             stream = stdout;
00068         }
00069         else {
00070             stream = fopen(name,"w");
00071             if (stream == NULL) {
00072                 stream = stdout;
00073             }
00074         }
00075     }
00076 
00077     void setLevel(int level) { logLevel = level; }
00078 
00079     int log(int level, const char* fmt, ...);
00080 
00081     int log(int level, const char* fmt, va_list arglist);
00082 
00083     int fatal(const char* fmt, ...);
00084 
00085     int error(const char* fmt, ...);
00086 
00087     int warn(const char* fmt, ...);
00088 
00089     int info(const char* fmt, ...);
00090 };
00091 
00092 CV_EXPORTS Logger& logger();
00093 
00094 } // namespace cvflann
00095 
00096 #endif //_OPENCV_LOGGER_H_