compat_cmath.h

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00001 /** @file rutz/compat_cmath.h Compatibility definitions for things missing from <cmath> */
00002 
00003 ///////////////////////////////////////////////////////////////////////
00004 //
00005 // Copyright (c) 2005-2007 University of Southern California
00006 // Rob Peters <rjpeters at usc dot edu>
00007 //
00008 // created: Mon Jan 16 18:16:40 2006
00009 // commit: $Id: compat_cmath.h 8249 2007-04-12 06:03:40Z rjpeters $
00010 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/rutz/compat_cmath.h $
00011 //
00012 // --------------------------------------------------------------------
00013 //
00014 // This file is part of GroovX.
00015 //   [http://www.klab.caltech.edu/rjpeters/groovx/]
00016 //
00017 // GroovX is free software; you can redistribute it and/or modify it
00018 // under the terms of the GNU General Public License as published by
00019 // the Free Software Foundation; either version 2 of the License, or
00020 // (at your option) any later version.
00021 //
00022 // GroovX is distributed in the hope that it will be useful, but
00023 // WITHOUT ANY WARRANTY; without even the implied warranty of
00024 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00025 // General Public License for more details.
00026 //
00027 // You should have received a copy of the GNU General Public License
00028 // along with GroovX; if not, write to the Free Software Foundation,
00029 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00030 //
00031 ///////////////////////////////////////////////////////////////////////
00032 
00033 #ifndef GROOVX_RUTZ_COMPAT_CMATH_H_UTC20060117021640_DEFINED
00034 #define GROOVX_RUTZ_COMPAT_CMATH_H_UTC20060117021640_DEFINED
00035 
00036 #include <cmath>
00037 
00038 namespace rutz
00039 {
00040   double compat_m_pi();
00041   double compat_m_pi_2();
00042   double compat_m_e();
00043   double compat_m_ln2();
00044 }
00045 
00046 
00047 #ifdef MISSING_M_PI
00048 #define                M_PI     (rutz::compat_m_pi())
00049 #endif
00050 
00051 #ifdef MISSING_M_PI_2
00052 #define                M_PI_2   (rutz::compat_m_pi_2())
00053 #endif
00054 
00055 #ifdef MISSING_M_E
00056 #define                M_E      (rutz::compat_m_e())
00057 #endif
00058 
00059 #ifdef MISSING_M_LN2
00060 #define                M_LN2    (rutz::compat_m_ln2())
00061 #endif
00062 
00063 #ifdef MISSING_CBRT
00064 #define                cbrt(x)  (pow(x, 1.0/3.0))
00065 #endif
00066 
00067 #ifdef MISSING_ISNAN
00068 #  if defined(HAVE_STD_ISNAN)
00069 template <class T> inline
00070 int                    isnan(T x) { return std::isnan(x); }
00071 #  endif
00072 #endif
00073 
00074 static const char __attribute__((used)) vcid_groovx_rutz_compat_cmath_h_utc20060117021640[] = "$Id: compat_cmath.h 8249 2007-04-12 06:03:40Z rjpeters $ $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/rutz/compat_cmath.h $";
00075 #endif // !GROOVX_RUTZ_COMPAT_CMATH_H_UTC20060117021640DEFINED