Evocosm - A C++ Framework for Evolutionary Computing

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Created by Scott Robert Ladd at Coyote Gulch Productions.


evocommon.h

00001 /*
00002     Evocosm is a heterogenous collection of mathematical tools,  written in Standard C.
00003 
00004     Copyright 2011 Scott Robert Ladd. All rights reserved.
00005 
00006     Evocosm is user-supported open source software. Its continued development is dependent
00007     on financial support from the community. You can provide funding by visiting the Evocosm
00008     website at:
00009 
00010         http://www.coyotegulch.com
00011 
00012     You may license Evocosm in one of two fashions:
00013 
00014     1) Simplified BSD License (FreeBSD License)
00015 
00016     Redistribution and use in source and binary forms, with or without modification, are
00017     permitted provided that the following conditions are met:
00018 
00019     1.  Redistributions of source code must retain the above copyright notice, this list of
00020         conditions and the following disclaimer.
00021 
00022     2.  Redistributions in binary form must reproduce the above copyright notice, this list
00023         of conditions and the following disclaimer in the documentation and/or other materials
00024         provided with the distribution.
00025 
00026     THIS SOFTWARE IS PROVIDED BY SCOTT ROBERT LADD ``AS IS'' AND ANY EXPRESS OR IMPLIED
00027     WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
00028     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SCOTT ROBERT LADD OR
00029     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00030     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00031     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
00032     ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00033     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
00034     ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00035 
00036     The views and conclusions contained in the software and documentation are those of the
00037     authors and should not be interpreted as representing official policies, either expressed
00038     or implied, of Scott Robert Ladd.
00039 
00040     2) Closed-Source Proprietary License
00041 
00042     If your project is a closed-source or proprietary project, the Simplified BSD License may
00043     not be appropriate or desirable. In such cases, contact the Evocosm copyright holder to
00044     arrange your purchase of an appropriate license.
00045 
00046     The author can be contacted at:
00047 
00048           scott.ladd@coyotegulch.com
00049           scott.ladd@gmail.com
00050           http:www.coyotegulch.com
00051 */
00052 
00053 #if !defined(LIBEVOCOSM_EVOCOMMON_H)
00054 #define LIBEVOCOSM_EVOCOMMON_H
00055 
00056 // Brahe library
00057 #include "libbrahe/prng.h"
00058 
00059 // Standard C++ Library
00060 #include <string>
00061 
00062 namespace libevocosm
00063 {
00065 
00069     class prng
00070     {
00071     private:
00072         brahe_prng_state_t m_random;
00073 
00074     public:
00076         prng()
00077         {
00078             brahe_prng_init(&m_random,BRAHE_PRNG_MWC1038,0);
00079         }
00080 
00082         ~prng()
00083         {
00084             brahe_prng_free(&m_random);
00085         }
00086 
00088         void set_seed(uint32_t a_seed)
00089         {
00090             brahe_prng_init(&m_random,BRAHE_PRNG_MWC1038,a_seed);
00091         }
00092 
00094         uint32_t get_seed()
00095         {
00096             return m_random.m_seed;
00097         }
00098 
00100         size_t get_index(size_t n)
00101         {
00102             return brahe_prng_index(&m_random,n);
00103         }
00104 
00106         double get_real()
00107         {
00108             return brahe_prng_real2(&m_random);
00109         }
00110     };
00111 
00113 
00117     class globals
00118     {
00119     protected:
00121         static size_t rand_index(size_t n)
00122         {
00123             return g_random.get_index(n);
00124         }
00125 
00127         static prng g_random;
00128 
00130         static std::string g_version;
00131 
00132     public:
00134         static void set_seed(uint32_t a_seed)
00135         {
00136             g_random.set_seed(a_seed);
00137         }
00138 
00140         static uint32_t get_seed()
00141         {
00142             return g_random.get_seed();
00143         }
00144 
00146         static std::string version()
00147         {
00148             return g_version;
00149         }
00150     };
00151 
00152 }
00153 
00154 #endif

© 2011 Scott Robert Ladd. All rights reserved.
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