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1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9 
10 #ifndef EIGEN_ALLANDANY_H
11 #define EIGEN_ALLANDANY_H
12 
13 namespace Eigen {
14 
15 namespace internal {
16 
17 template<typename Derived, int UnrollCount>
18 struct all_unroller
19 {
20   enum {
21     col = (UnrollCount-1) / Derived::RowsAtCompileTime,
22     row = (UnrollCount-1) % Derived::RowsAtCompileTime
23   };
24 
runall_unroller25   static inline bool run(const Derived &mat)
26   {
27     return all_unroller<Derived, UnrollCount-1>::run(mat) && mat.coeff(row, col);
28   }
29 };
30 
31 template<typename Derived>
32 struct all_unroller<Derived, 0>
33 {
34   static inline bool run(const Derived &/*mat*/) { return true; }
35 };
36 
37 template<typename Derived>
38 struct all_unroller<Derived, Dynamic>
39 {
40   static inline bool run(const Derived &) { return false; }
41 };
42 
43 template<typename Derived, int UnrollCount>
44 struct any_unroller
45 {
46   enum {
47     col = (UnrollCount-1) / Derived::RowsAtCompileTime,
48     row = (UnrollCount-1) % Derived::RowsAtCompileTime
49   };
50 
51   static inline bool run(const Derived &mat)
52   {
53     return any_unroller<Derived, UnrollCount-1>::run(mat) || mat.coeff(row, col);
54   }
55 };
56 
57 template<typename Derived>
58 struct any_unroller<Derived, 0>
59 {
60   static inline bool run(const Derived & /*mat*/) { return false; }
61 };
62 
63 template<typename Derived>
64 struct any_unroller<Derived, Dynamic>
65 {
66   static inline bool run(const Derived &) { return false; }
67 };
68 
69 } // end namespace internal
70 
71 /** \returns true if all coefficients are true
72   *
73   * Example: \include MatrixBase_all.cpp
74   * Output: \verbinclude MatrixBase_all.out
75   *
76   * \sa any(), Cwise::operator<()
77   */
78 template<typename Derived>
79 inline bool DenseBase<Derived>::all() const
80 {
81   enum {
82     unroll = SizeAtCompileTime != Dynamic
83           && CoeffReadCost != Dynamic
84           && NumTraits<Scalar>::AddCost != Dynamic
85           && SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost) <= EIGEN_UNROLLING_LIMIT
86   };
87   if(unroll)
88     return internal::all_unroller<Derived, unroll ? int(SizeAtCompileTime) : Dynamic>::run(derived());
89   else
90   {
91     for(Index j = 0; j < cols(); ++j)
92       for(Index i = 0; i < rows(); ++i)
93         if (!coeff(i, j)) return false;
94     return true;
95   }
96 }
97 
98 /** \returns true if at least one coefficient is true
99   *
100   * \sa all()
101   */
102 template<typename Derived>
103 inline bool DenseBase<Derived>::any() const
104 {
105   enum {
106     unroll = SizeAtCompileTime != Dynamic
107           && CoeffReadCost != Dynamic
108           && NumTraits<Scalar>::AddCost != Dynamic
109           && SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost) <= EIGEN_UNROLLING_LIMIT
110   };
111   if(unroll)
112     return internal::any_unroller<Derived, unroll ? int(SizeAtCompileTime) : Dynamic>::run(derived());
113   else
114   {
115     for(Index j = 0; j < cols(); ++j)
116       for(Index i = 0; i < rows(); ++i)
117         if (coeff(i, j)) return true;
118     return false;
119   }
120 }
121 
122 /** \returns the number of coefficients which evaluate to true
123   *
124   * \sa all(), any()
125   */
126 template<typename Derived>
127 inline typename DenseBase<Derived>::Index DenseBase<Derived>::count() const
128 {
129   return derived().template cast<bool>().template cast<Index>().sum();
130 }
131 
132 /** \returns true is \c *this contains at least one Not A Number (NaN).
133   *
134   * \sa allFinite()
135   */
136 template<typename Derived>
137 inline bool DenseBase<Derived>::hasNaN() const
138 {
139   return !((derived().array()==derived().array()).all());
140 }
141 
142 /** \returns true if \c *this contains only finite numbers, i.e., no NaN and no +/-INF values.
143   *
144   * \sa hasNaN()
145   */
146 template<typename Derived>
147 inline bool DenseBase<Derived>::allFinite() const
148 {
149   return !((derived()-derived()).hasNaN());
150 }
151 
152 } // end namespace Eigen
153 
154 #endif // EIGEN_ALLANDANY_H
155