fn_trunc_exp.hpp
Go to the documentation of this file.00001 // Copyright (C) 2008-2010 NICTA (www.nicta.com.au) 00002 // Copyright (C) 2008-2010 Conrad Sanderson 00003 // 00004 // This file is part of the Armadillo C++ library. 00005 // It is provided without any warranty of fitness 00006 // for any purpose. You can redistribute this file 00007 // and/or modify it under the terms of the GNU 00008 // Lesser General Public License (LGPL) as published 00009 // by the Free Software Foundation, either version 3 00010 // of the License or (at your option) any later version. 00011 // (see http://www.opensource.org/licenses for more info) 00012 00013 00014 00017 00018 00019 00020 template<typename eT> 00021 inline 00022 static 00023 typename arma_float_only<eT>::result 00024 trunc_exp(const eT x) 00025 { 00026 if(std::numeric_limits<eT>::is_iec559 && (x >= Math<eT>::log_max() )) 00027 { 00028 return std::numeric_limits<eT>::max(); 00029 } 00030 else 00031 { 00032 return std::exp(x); 00033 } 00034 } 00035 00036 00037 00038 template<typename eT> 00039 inline 00040 static 00041 typename arma_integral_only<eT>::result 00042 trunc_exp(const eT x) 00043 { 00044 return eT( trunc_exp( double(x) ) ); 00045 } 00046 00047 00048 00049 template<typename T> 00050 arma_inline 00051 static 00052 std::complex<T> 00053 trunc_exp(const std::complex<T>& x) 00054 { 00055 return std::exp(x); 00056 } 00057 00058 00059 00060 template<typename T1> 00061 arma_inline 00062 const eOp<T1, eop_trunc_exp> 00063 trunc_exp(const Base<typename T1::elem_type,T1>& A) 00064 { 00065 arma_extra_debug_sigprint(); 00066 00067 return eOp<T1, eop_trunc_exp>(A.get_ref()); 00068 } 00069 00070 00071 00072 template<typename T1> 00073 arma_inline 00074 const eOpCube<T1, eop_trunc_exp> 00075 trunc_exp(const BaseCube<typename T1::elem_type,T1>& A) 00076 { 00077 arma_extra_debug_sigprint(); 00078 00079 return eOpCube<T1, eop_trunc_exp>(A.get_ref()); 00080 } 00081 00082 00083