Stone Three Foundation Classes

00001 /*
00002  * Stone Three Foundation Class (s3fc) provides a number of utility classes.
00003  * Copyright (C) 2001 by Stone Three Signal Processing (Pty) Ltd.
00004  *
00005  * Authored by Stone Three Signal Processing (Pty) Ltd.
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  * 
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020  * 
00021  * Please see the file 'COPYING' in the source root directory.
00022  */
00023 
00033 #ifndef S3_UTILS_H
00034 #define S3_UTILS_H
00035 
00036 #ifndef _WIN32
00037 #include <sys/time.h>
00038 #endif
00039 
00043 class s3_utils
00044 {
00045 public:
00046 
00052    template<typename T> 
00053    inline static T sqr( const T &t )
00054    {
00055       return ( t * t );
00056    }
00057 
00061    template<typename T> 
00062    inline static T min( const T &t0, const T &t1 )
00063    {
00064       return ( ( t0 < t1 ) ? t0 : t1 );
00065    }
00066 
00070    template<typename T> 
00071    inline static T max( const T &t0, const T &t1 )
00072    {
00073       return ( ( t0 > t1 ) ? t0 : t1 );
00074    }
00075 
00076 #ifndef _WIN32
00077 
00086    inline static float time_diff( const timeval& time_start, const timeval& time_end )
00087    {
00088       return 
00089          static_cast<float>( time_end.tv_sec - time_start.tv_sec ) + 
00090          1e-6 * static_cast<float>( time_end.tv_usec - time_start.tv_usec );
00091    }
00092 #endif
00093 };
00094 
00095 #endif //S3_UTILS_H
s3_utils.h
