1 | // This file is part of Eigen, a lightweight C++ template library
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2 | // for linear algebra.
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3 | //
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4 | // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
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5 | //
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6 | // This Source Code Form is subject to the terms of the Mozilla
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7 | // Public License v. 2.0. If a copy of the MPL was not distributed
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8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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9 |
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10 | #ifndef EIGEN_ALLANDANY_H
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11 | #define EIGEN_ALLANDANY_H
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12 |
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13 | namespace Eigen {
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14 |
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15 | namespace internal {
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16 |
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17 | template<typename Derived, int UnrollCount>
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18 | struct all_unroller
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19 | {
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20 | enum {
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21 | col = (UnrollCount-1) / Derived::RowsAtCompileTime,
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22 | row = (UnrollCount-1) % Derived::RowsAtCompileTime
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23 | };
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24 |
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25 | static inline bool run(const Derived &mat)
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26 | {
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27 | return all_unroller<Derived, UnrollCount-1>::run(mat) && mat.coeff(row, col);
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28 | }
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29 | };
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30 |
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31 | template<typename Derived>
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32 | struct all_unroller<Derived, 0>
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33 | {
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34 | static inline bool run(const Derived &/*mat*/) { return true; }
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35 | };
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36 |
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37 | template<typename Derived>
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38 | struct all_unroller<Derived, Dynamic>
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39 | {
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40 | static inline bool run(const Derived &) { return false; }
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41 | };
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42 |
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43 | template<typename Derived, int UnrollCount>
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44 | struct any_unroller
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45 | {
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46 | enum {
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47 | col = (UnrollCount-1) / Derived::RowsAtCompileTime,
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48 | row = (UnrollCount-1) % Derived::RowsAtCompileTime
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49 | };
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50 |
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51 | static inline bool run(const Derived &mat)
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52 | {
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53 | return any_unroller<Derived, UnrollCount-1>::run(mat) || mat.coeff(row, col);
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54 | }
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55 | };
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56 |
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57 | template<typename Derived>
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58 | struct any_unroller<Derived, 0>
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59 | {
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60 | static inline bool run(const Derived & /*mat*/) { return false; }
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61 | };
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62 |
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63 | template<typename Derived>
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64 | struct any_unroller<Derived, Dynamic>
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65 | {
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66 | static inline bool run(const Derived &) { return false; }
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67 | };
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68 |
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69 | } // end namespace internal
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70 |
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71 | /** \returns true if all coefficients are true
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72 | *
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73 | * Example: \include MatrixBase_all.cpp
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74 | * Output: \verbinclude MatrixBase_all.out
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75 | *
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76 | * \sa any(), Cwise::operator<()
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77 | */
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78 | template<typename Derived>
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79 | inline bool DenseBase<Derived>::all() const
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80 | {
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81 | enum {
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82 | unroll = SizeAtCompileTime != Dynamic
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83 | && CoeffReadCost != Dynamic
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84 | && NumTraits<Scalar>::AddCost != Dynamic
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85 | && SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost) <= EIGEN_UNROLLING_LIMIT
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86 | };
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87 | if(unroll)
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88 | return internal::all_unroller<Derived, unroll ? int(SizeAtCompileTime) : Dynamic>::run(derived());
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89 | else
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90 | {
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91 | for(Index j = 0; j < cols(); ++j)
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92 | for(Index i = 0; i < rows(); ++i)
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93 | if (!coeff(i, j)) return false;
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94 | return true;
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95 | }
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96 | }
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97 |
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98 | /** \returns true if at least one coefficient is true
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99 | *
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100 | * \sa all()
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101 | */
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102 | template<typename Derived>
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103 | inline bool DenseBase<Derived>::any() const
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104 | {
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105 | enum {
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106 | unroll = SizeAtCompileTime != Dynamic
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107 | && CoeffReadCost != Dynamic
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108 | && NumTraits<Scalar>::AddCost != Dynamic
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109 | && SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost) <= EIGEN_UNROLLING_LIMIT
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110 | };
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111 | if(unroll)
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112 | return internal::any_unroller<Derived, unroll ? int(SizeAtCompileTime) : Dynamic>::run(derived());
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113 | else
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114 | {
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115 | for(Index j = 0; j < cols(); ++j)
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116 | for(Index i = 0; i < rows(); ++i)
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117 | if (coeff(i, j)) return true;
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118 | return false;
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119 | }
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120 | }
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121 |
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122 | /** \returns the number of coefficients which evaluate to true
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123 | *
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124 | * \sa all(), any()
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125 | */
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126 | template<typename Derived>
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127 | inline typename DenseBase<Derived>::Index DenseBase<Derived>::count() const
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128 | {
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129 | return derived().template cast<bool>().template cast<Index>().sum();
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130 | }
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131 |
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132 | /** \returns true is \c *this contains at least one Not A Number (NaN).
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133 | *
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134 | * \sa allFinite()
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135 | */
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136 | template<typename Derived>
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137 | inline bool DenseBase<Derived>::hasNaN() const
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138 | {
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139 | return !((derived().array()==derived().array()).all());
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140 | }
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141 |
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142 | /** \returns true if \c *this contains only finite numbers, i.e., no NaN and no +/-INF values.
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143 | *
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144 | * \sa hasNaN()
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145 | */
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146 | template<typename Derived>
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147 | inline bool DenseBase<Derived>::allFinite() const
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148 | {
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149 | return !((derived()-derived()).hasNaN());
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150 | }
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151 |
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152 | } // end namespace Eigen
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153 |
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154 | #endif // EIGEN_ALLANDANY_H
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