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1 | // The template and inlines for the -*- C++ -*- indirect_array class. |
2 | ||
5b9daa7e | 3 | // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2009 |
00386a9b | 4 | // Free Software Foundation, Inc. |
725dc051 BK |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
748086b7 | 9 | // Free Software Foundation; either version 3, or (at your option) |
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10 | // any later version. |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
748086b7 JJ |
17 | // Under Section 7 of GPL version 3, you are granted additional |
18 | // permissions described in the GCC Runtime Library Exception, version | |
19 | // 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | // You should have received a copy of the GNU General Public License and | |
22 | // a copy of the GCC Runtime Library Exception along with this program; | |
23 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | // <http://www.gnu.org/licenses/>. | |
725dc051 | 25 | |
729e3d3f PE |
26 | /** @file indirect_array.h |
27 | * This is an internal header file, included by other library headers. | |
28 | * You should not attempt to use it directly. | |
29 | */ | |
30 | ||
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31 | // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr> |
32 | ||
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33 | #ifndef _INDIRECT_ARRAY_H |
34 | #define _INDIRECT_ARRAY_H 1 | |
b0a85b86 GDR |
35 | |
36 | #pragma GCC system_header | |
725dc051 | 37 | |
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38 | _GLIBCXX_BEGIN_NAMESPACE(std) |
39 | ||
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40 | /** |
41 | * @addtogroup numeric_arrays | |
42 | * @{ | |
43 | */ | |
44 | ||
7fb397a4 JQ |
45 | /** |
46 | * @brief Reference to arbitrary subset of an array. | |
47 | * | |
48 | * An indirect_array is a reference to the actual elements of an array | |
82cb2574 PC |
49 | * specified by an ordered array of indices. The way to get an |
50 | * indirect_array is to call operator[](valarray<size_t>) on a valarray. | |
51 | * The returned indirect_array then permits carrying operations out on the | |
52 | * referenced subset of elements in the original valarray. | |
7fb397a4 JQ |
53 | * |
54 | * For example, if an indirect_array is obtained using the array (4,2,0) as | |
55 | * an argument, and then assigned to an array containing (1,2,3), then the | |
56 | * underlying array will have array[0]==3, array[2]==2, and array[4]==1. | |
57 | * | |
58 | * @param Tp Element type. | |
59 | */ | |
8164237c | 60 | template <class _Tp> |
7fb397a4 JQ |
61 | class indirect_array |
62 | { | |
63 | public: | |
64 | typedef _Tp value_type; | |
8164237c | 65 | |
d4cd08dd PC |
66 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
67 | // 253. valarray helper functions are almost entirely useless | |
68 | ||
ecc7568d JQ |
69 | /// Copy constructor. Both slices refer to the same underlying array. |
70 | indirect_array(const indirect_array&); | |
71 | ||
7fb397a4 JQ |
72 | /// Assignment operator. Assigns elements to corresponding elements |
73 | /// of @a a. | |
74 | indirect_array& operator=(const indirect_array&); | |
ed6814f7 | 75 | |
7fb397a4 JQ |
76 | /// Assign slice elements to corresponding elements of @a v. |
77 | void operator=(const valarray<_Tp>&) const; | |
78 | /// Multiply slice elements by corresponding elements of @a v. | |
79 | void operator*=(const valarray<_Tp>&) const; | |
80 | /// Divide slice elements by corresponding elements of @a v. | |
81 | void operator/=(const valarray<_Tp>&) const; | |
82 | /// Modulo slice elements by corresponding elements of @a v. | |
ed6814f7 | 83 | void operator%=(const valarray<_Tp>&) const; |
7fb397a4 JQ |
84 | /// Add corresponding elements of @a v to slice elements. |
85 | void operator+=(const valarray<_Tp>&) const; | |
86 | /// Subtract corresponding elements of @a v from slice elements. | |
ed6814f7 | 87 | void operator-=(const valarray<_Tp>&) const; |
7fb397a4 JQ |
88 | /// Logical xor slice elements with corresponding elements of @a v. |
89 | void operator^=(const valarray<_Tp>&) const; | |
90 | /// Logical and slice elements with corresponding elements of @a v. | |
91 | void operator&=(const valarray<_Tp>&) const; | |
92 | /// Logical or slice elements with corresponding elements of @a v. | |
93 | void operator|=(const valarray<_Tp>&) const; | |
94 | /// Left shift slice elements by corresponding elements of @a v. | |
95 | void operator<<=(const valarray<_Tp>&) const; | |
96 | /// Right shift slice elements by corresponding elements of @a v. | |
ed6814f7 | 97 | void operator>>=(const valarray<_Tp>&) const; |
7fb397a4 JQ |
98 | /// Assign all slice elements to @a t. |
99 | void operator= (const _Tp&) const; | |
100 | // ~indirect_array(); | |
ed6814f7 | 101 | |
7fb397a4 JQ |
102 | template<class _Dom> |
103 | void operator=(const _Expr<_Dom, _Tp>&) const; | |
104 | template<class _Dom> | |
105 | void operator*=(const _Expr<_Dom, _Tp>&) const; | |
106 | template<class _Dom> | |
107 | void operator/=(const _Expr<_Dom, _Tp>&) const; | |
108 | template<class _Dom> | |
109 | void operator%=(const _Expr<_Dom, _Tp>&) const; | |
110 | template<class _Dom> | |
111 | void operator+=(const _Expr<_Dom, _Tp>&) const; | |
112 | template<class _Dom> | |
113 | void operator-=(const _Expr<_Dom, _Tp>&) const; | |
114 | template<class _Dom> | |
115 | void operator^=(const _Expr<_Dom, _Tp>&) const; | |
116 | template<class _Dom> | |
117 | void operator&=(const _Expr<_Dom, _Tp>&) const; | |
118 | template<class _Dom> | |
119 | void operator|=(const _Expr<_Dom, _Tp>&) const; | |
120 | template<class _Dom> | |
121 | void operator<<=(const _Expr<_Dom, _Tp>&) const; | |
122 | template<class _Dom> | |
ed6814f7 | 123 | void operator>>=(const _Expr<_Dom, _Tp>&) const; |
8164237c | 124 | |
7fb397a4 JQ |
125 | private: |
126 | /// Copy constructor. Both slices refer to the same underlying array. | |
7fb397a4 | 127 | indirect_array(_Array<_Tp>, size_t, _Array<size_t>); |
8164237c | 128 | |
7fb397a4 JQ |
129 | friend class valarray<_Tp>; |
130 | friend class gslice_array<_Tp>; | |
ed6814f7 BI |
131 | |
132 | const size_t _M_sz; | |
7fb397a4 | 133 | const _Array<size_t> _M_index; |
ed6814f7 BI |
134 | const _Array<_Tp> _M_array; |
135 | ||
7fb397a4 JQ |
136 | // not implemented |
137 | indirect_array(); | |
138 | }; | |
8164237c GDR |
139 | |
140 | template<typename _Tp> | |
ed6814f7 | 141 | inline |
00386a9b | 142 | indirect_array<_Tp>::indirect_array(const indirect_array<_Tp>& __a) |
d4cd08dd | 143 | : _M_sz(__a._M_sz), _M_index(__a._M_index), _M_array(__a._M_array) {} |
8164237c GDR |
144 | |
145 | template<typename _Tp> | |
82cb2574 PC |
146 | inline |
147 | indirect_array<_Tp>::indirect_array(_Array<_Tp> __a, size_t __s, | |
148 | _Array<size_t> __i) | |
149 | : _M_sz(__s), _M_index(__i), _M_array(__a) {} | |
8164237c GDR |
150 | |
151 | template<typename _Tp> | |
82cb2574 PC |
152 | inline indirect_array<_Tp>& |
153 | indirect_array<_Tp>::operator=(const indirect_array<_Tp>& __a) | |
154 | { | |
155 | std::__valarray_copy(__a._M_array, _M_sz, __a._M_index, _M_array, | |
156 | _M_index); | |
157 | return *this; | |
158 | } | |
8164237c | 159 | |
8164237c | 160 | template<typename _Tp> |
82cb2574 PC |
161 | inline void |
162 | indirect_array<_Tp>::operator=(const _Tp& __t) const | |
163 | { std::__valarray_fill(_M_array, _M_index, _M_sz, __t); } | |
8164237c GDR |
164 | |
165 | template<typename _Tp> | |
82cb2574 PC |
166 | inline void |
167 | indirect_array<_Tp>::operator=(const valarray<_Tp>& __v) const | |
168 | { std::__valarray_copy(_Array<_Tp>(__v), _M_sz, _M_array, _M_index); } | |
8164237c GDR |
169 | |
170 | template<typename _Tp> | |
82cb2574 PC |
171 | template<class _Dom> |
172 | inline void | |
173 | indirect_array<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e) const | |
174 | { std::__valarray_copy(__e, _M_sz, _M_array, _M_index); } | |
725dc051 BK |
175 | |
176 | #undef _DEFINE_VALARRAY_OPERATOR | |
00386a9b GDR |
177 | #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name) \ |
178 | template<typename _Tp> \ | |
179 | inline void \ | |
180 | indirect_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const\ | |
181 | { \ | |
182 | _Array_augmented_##_Name(_M_array, _M_index, _Array<_Tp>(__v), _M_sz); \ | |
183 | } \ | |
725dc051 | 184 | \ |
00386a9b GDR |
185 | template<typename _Tp> \ |
186 | template<class _Dom> \ | |
187 | inline void \ | |
188 | indirect_array<_Tp>::operator _Op##=(const _Expr<_Dom,_Tp>& __e) const\ | |
189 | { \ | |
190 | _Array_augmented_##_Name(_M_array, _M_index, __e, _M_sz); \ | |
191 | } | |
192 | ||
193 | _DEFINE_VALARRAY_OPERATOR(*, __multiplies) | |
194 | _DEFINE_VALARRAY_OPERATOR(/, __divides) | |
195 | _DEFINE_VALARRAY_OPERATOR(%, __modulus) | |
196 | _DEFINE_VALARRAY_OPERATOR(+, __plus) | |
197 | _DEFINE_VALARRAY_OPERATOR(-, __minus) | |
198 | _DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor) | |
199 | _DEFINE_VALARRAY_OPERATOR(&, __bitwise_and) | |
200 | _DEFINE_VALARRAY_OPERATOR(|, __bitwise_or) | |
201 | _DEFINE_VALARRAY_OPERATOR(<<, __shift_left) | |
202 | _DEFINE_VALARRAY_OPERATOR(>>, __shift_right) | |
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203 | |
204 | #undef _DEFINE_VALARRAY_OPERATOR | |
205 | ||
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206 | // @} group numeric_arrays |
207 | ||
3cbc7af0 | 208 | _GLIBCXX_END_NAMESPACE |
725dc051 | 209 | |
3d7c150e | 210 | #endif /* _INDIRECT_ARRAY_H */ |