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1 // Copyright (C) 2008-2010 NICTA (www.nicta.com.au)
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2 // Copyright (C) 2008-2010 Conrad Sanderson
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3 //
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4 // This file is part of the Armadillo C++ library.
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5 // It is provided without any warranty of fitness
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6 // for any purpose. You can redistribute this file
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7 // and/or modify it under the terms of the GNU
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8 // Lesser General Public License (LGPL) as published
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9 // by the Free Software Foundation, either version 3
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10 // of the License or (at your option) any later version.
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11 // (see http://www.opensource.org/licenses for more info)
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12
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13
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14
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15 //! \addtogroup fn_trunc_exp
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16 //! @{
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17
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18
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19
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20 template<typename eT>
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21 inline
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22 static
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23 typename arma_float_only<eT>::result
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24 trunc_exp(const eT x)
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25 {
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26 if(std::numeric_limits<eT>::is_iec559 && (x >= Math<eT>::log_max() ))
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27 {
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28 return std::numeric_limits<eT>::max();
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29 }
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30 else
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31 {
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32 return std::exp(x);
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33 }
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34 }
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35
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36
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37
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38 template<typename eT>
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39 inline
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40 static
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41 typename arma_integral_only<eT>::result
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42 trunc_exp(const eT x)
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43 {
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44 return eT( trunc_exp( double(x) ) );
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45 }
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46
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47
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48
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49 template<typename T>
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50 arma_inline
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51 static
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52 std::complex<T>
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53 trunc_exp(const std::complex<T>& x)
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54 {
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55 return std::exp(x);
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56 }
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57
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58
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59
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60 template<typename T1>
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61 arma_inline
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62 const eOp<T1, eop_trunc_exp>
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63 trunc_exp(const Base<typename T1::elem_type,T1>& A)
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64 {
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65 arma_extra_debug_sigprint();
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66
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67 return eOp<T1, eop_trunc_exp>(A.get_ref());
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68 }
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69
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70
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71
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72 template<typename T1>
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73 arma_inline
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74 const eOpCube<T1, eop_trunc_exp>
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75 trunc_exp(const BaseCube<typename T1::elem_type,T1>& A)
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76 {
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77 arma_extra_debug_sigprint();
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78
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79 return eOpCube<T1, eop_trunc_exp>(A.get_ref());
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80 }
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81
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82
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83
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84 //! @}
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