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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<h1>array2d.h</h1><a href="array2d_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright 2008-2009 NVIDIA Corporation</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00005"></a>00005 <span class="comment"> * you may not use this file except in compliance with the License.</span>
<a name="l00006"></a>00006 <span class="comment"> * You may obtain a copy of the License at</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span>
<a name="l00011"></a>00011 <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00012"></a>00012 <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00013"></a>00013 <span class="comment"> * See the License for the specific language governing permissions and</span>
<a name="l00014"></a>00014 <span class="comment"> * limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"> */</span>
<a name="l00016"></a>00016
<a name="l00021"></a>00021 <span class="preprocessor">#pragma once</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <cusp/detail/config.h></span>
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="preprocessor">#include <<a class="code" href="memory_8h.html" title="Memory spaces and allocators.">cusp/memory.h</a>></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <<a class="code" href="format_8h.html" title="Format types.">cusp/format.h</a>></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <<a class="code" href="array1d_8h.html" title="One-dimensional array.">cusp/array1d.h</a>></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <cusp/detail/matrix_base.h></span>
<a name="l00029"></a>00029
<a name="l00030"></a><a class="code" href="structcusp_1_1row__major.html">00030</a> <span class="preprocessor">#include <thrust/functional.h></span>
<a name="l00031"></a><a class="code" href="structcusp_1_1column__major.html">00031</a>
<a name="l00032"></a>00032 <span class="comment">// TODO move indexing stuff to /detail/</span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">namespace </span>cusp
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">struct </span><a class="code" href="structcusp_1_1row__major.html">row_major</a> {};
<a name="l00038"></a>00038 <span class="keyword">struct </span><a class="code" href="structcusp_1_1column__major.html">column_major</a> {};
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// forward definitions</span>
<a name="l00041"></a>00041 <span class="keyword">template</span><<span class="keyword">typename</span> Array, <span class="keyword">class</span> Orientation> <span class="keyword">class </span><a class="code" href="classcusp_1_1array2d__view.html">array2d_view</a>;
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keyword">namespace </span>detail
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <span class="comment">// (i,j) -> major dimension</span>
<a name="l00046"></a>00046 <span class="comment">// (i,j) -> minor dimension</span>
<a name="l00047"></a>00047 <span class="comment">// logical n -> (i,j)</span>
<a name="l00048"></a>00048 <span class="comment">// (i,j) -> logical n</span>
<a name="l00049"></a>00049 <span class="comment">// (i,j) -> physical n</span>
<a name="l00050"></a>00050 <span class="comment">// logical n -> physical n</span>
<a name="l00051"></a>00051 <span class="comment">// logical n -> physical n (translated)</span>
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00054"></a>00054 __host__ __device__
<a name="l00055"></a>00055 IndexType minor_dimension(IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1row__major.html">row_major</a>) { <span class="keywordflow">return</span> num_cols; }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00058"></a>00058 __host__ __device__
<a name="l00059"></a>00059 IndexType minor_dimension(IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1column__major.html">column_major</a>) { <span class="keywordflow">return</span> num_rows; }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00062"></a>00062 __host__ __device__
<a name="l00063"></a>00063 IndexType major_dimension(IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1row__major.html">row_major</a>) { <span class="keywordflow">return</span> num_rows; }
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00066"></a>00066 __host__ __device__
<a name="l00067"></a>00067 IndexType major_dimension(IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1column__major.html">column_major</a>) { <span class="keywordflow">return</span> num_cols; }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// convert logical linear index into a logical (i,j) index</span>
<a name="l00070"></a>00070 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00071"></a>00071 __host__ __device__
<a name="l00072"></a>00072 IndexType linear_index_to_row_index(IndexType linear_index, IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1row__major.html">row_major</a>) { <span class="keywordflow">return</span> linear_index / num_cols; }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00075"></a>00075 __host__ __device__
<a name="l00076"></a>00076 IndexType linear_index_to_col_index(IndexType linear_index, IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1row__major.html">row_major</a>) { <span class="keywordflow">return</span> linear_index % num_cols; }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00079"></a>00079 __host__ __device__
<a name="l00080"></a>00080 IndexType linear_index_to_row_index(IndexType linear_index, IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1column__major.html">column_major</a>) { <span class="keywordflow">return</span> linear_index % num_rows; }
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00083"></a>00083 __host__ __device__
<a name="l00084"></a>00084 IndexType linear_index_to_col_index(IndexType linear_index, IndexType num_rows, IndexType num_cols, <a class="code" href="structcusp_1_1column__major.html">column_major</a>) { <span class="keywordflow">return</span> linear_index / num_rows; }
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="comment">// convert a logical (i,j) index into a physical linear index</span>
<a name="l00087"></a>00087 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00088"></a>00088 __host__ __device__
<a name="l00089"></a>00089 IndexType index_of(IndexType i, IndexType j, IndexType pitch, <a class="code" href="structcusp_1_1row__major.html">row_major</a>) { <span class="keywordflow">return</span> i * pitch + j; }
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType>
<a name="l00092"></a>00092 __host__ __device__
<a name="l00093"></a>00093 IndexType index_of(IndexType i, IndexType j, IndexType pitch, <a class="code" href="structcusp_1_1column__major.html">column_major</a>) { <span class="keywordflow">return</span> j * pitch + i; }
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType, <span class="keyword">typename</span> Orientation>
<a name="l00096"></a>00096 __host__ __device__
<a name="l00097"></a>00097 IndexType logical_to_physical(IndexType linear_index, IndexType num_rows, IndexType num_cols, IndexType pitch, Orientation)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 IndexType i = linear_index_to_row_index(linear_index, num_rows, num_cols, Orientation());
<a name="l00100"></a>00100 IndexType j = linear_index_to_col_index(linear_index, num_rows, num_cols, Orientation());
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="keywordflow">return</span> index_of(i, j, pitch, Orientation());
<a name="l00103"></a>00103 }
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// convert logical linear index in the source into a physical linear index in the destination</span>
<a name="l00106"></a>00106 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType, <span class="keyword">typename</span> Orientation1, <span class="keyword">typename</span> Orientation2>
<a name="l00107"></a>00107 __host__ __device__
<a name="l00108"></a>00108 IndexType logical_to_other_physical(IndexType linear_index, IndexType num_rows, IndexType num_cols, IndexType pitch, Orientation1, Orientation2)
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 IndexType i = linear_index_to_row_index(linear_index, num_rows, num_cols, Orientation1());
<a name="l00111"></a><a class="code" href="structcusp_1_1detail_1_1logical__to__physical__functor.html">00111</a> IndexType j = linear_index_to_col_index(linear_index, num_rows, num_cols, Orientation1());
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">return</span> index_of(i, j, pitch, Orientation2());
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="comment">// functors </span>
<a name="l00117"></a>00117 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType, <span class="keyword">typename</span> Orientation>
<a name="l00118"></a>00118 <span class="keyword">struct </span><a class="code" href="structcusp_1_1detail_1_1logical__to__physical__functor.html">logical_to_physical_functor</a> : <span class="keyword">public</span> thrust::unary_function<IndexType,IndexType>
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 IndexType num_rows, num_cols, pitch;
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <a class="code" href="structcusp_1_1detail_1_1logical__to__physical__functor.html">logical_to_physical_functor</a>(IndexType num_rows, IndexType num_cols, IndexType pitch)
<a name="l00123"></a>00123 : num_rows(num_rows), num_cols(num_cols), pitch(pitch) {}
<a name="l00124"></a>00124
<a name="l00125"></a>00125 __host__ __device__
<a name="l00126"></a><a class="code" href="structcusp_1_1detail_1_1logical__to__other__physical__functor.html">00126</a> IndexType operator()(<span class="keyword">const</span> IndexType i)<span class="keyword"> const</span>
<a name="l00127"></a>00127 <span class="keyword"> </span>{
<a name="l00128"></a>00128 <span class="keywordflow">return</span> logical_to_physical(i, num_rows, num_cols, pitch, Orientation());
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 };
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keyword">template</span> <<span class="keyword">typename</span> IndexType, <span class="keyword">typename</span> Orientation1, <span class="keyword">typename</span> Orientation2>
<a name="l00133"></a>00133 <span class="keyword">struct </span>logical_to_other_physical_functor : <span class="keyword">public</span> thrust::unary_function<IndexType,IndexType>
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 IndexType num_rows, num_cols, pitch;
<a name="l00136"></a>00136
<a name="l00137"></a>00137 logical_to_other_physical_functor(IndexType num_rows, IndexType num_cols, IndexType pitch)
<a name="l00138"></a>00138 : num_rows(num_rows), num_cols(num_cols), pitch(pitch) {}
<a name="l00139"></a>00139
<a name="l00140"></a>00140 __host__ __device__
<a name="l00141"></a><a class="code" href="structcusp_1_1detail_1_1row__view.html">00141</a> IndexType operator()(<span class="keyword">const</span> IndexType i)<span class="keyword"> const</span>
<a name="l00142"></a>00142 <span class="keyword"> </span>{
<a name="l00143"></a>00143 <span class="keywordflow">return</span> logical_to_other_physical(i, num_rows, num_cols, pitch, Orientation1(), Orientation2());
<a name="l00144"></a><a class="code" href="structcusp_1_1detail_1_1row__view_3_01Iterator_00_01cusp_1_1row__major_01_4.html">00144</a> }
<a name="l00145"></a>00145 };
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator, <span class="keyword">class</span> Orientation>
<a name="l00148"></a>00148 <span class="keyword">struct </span>row_view {};
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator>
<a name="l00151"></a>00151 <span class="keyword">struct </span>row_view<Iterator,cusp::row_major> : <span class="keyword">public</span> cusp::array1d_view<Iterator>
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="keyword">template</span> <<span class="keyword">typename</span> Array>
<a name="l00154"></a><a class="code" href="structcusp_1_1detail_1_1column__view.html">00154</a> <a class="code" href="structcusp_1_1detail_1_1row__view.html">row_view</a>(Array& A, <span class="keywordtype">size_t</span> n)
<a name="l00155"></a>00155 : cusp::<a class="code" href="classcusp_1_1array1d__view.html">array1d_view</a><Iterator>(A.values.begin() + A.pitch * n,
<a name="l00156"></a>00156 A.values.begin() + A.pitch * n + A.num_cols)
<a name="l00157"></a><a class="code" href="structcusp_1_1detail_1_1column__view_3_01Iterator_00_01cusp_1_1column__major_01_4.html">00157</a> {}
<a name="l00158"></a>00158 };
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator, <span class="keyword">class</span> Orientation>
<a name="l00161"></a>00161 <span class="keyword">struct </span>column_view {};
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator>
<a name="l00164"></a>00164 <span class="keyword">struct </span>column_view<Iterator,cusp::column_major> : <span class="keyword">public</span> cusp::array1d_view<Iterator>
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="keyword">template</span> <<span class="keyword">typename</span> Array>
<a name="l00167"></a>00167 column_view(Array& A, <span class="keywordtype">size_t</span> n)
<a name="l00168"></a>00168 : cusp::array1d_view<Iterator>(A.values.begin() + A.pitch * n,
<a name="l00169"></a>00169 A.values.begin() + A.pitch * n + A.num_rows)
<a name="l00170"></a>00170 {}
<a name="l00171"></a>00171 };
<a name="l00172"></a>00172 } <span class="comment">// end namespace detail</span>
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="comment">// TODO document mapping of (i,j) onto values[pitch * i + j] or values[pitch * j + i]</span>
<a name="l00175"></a>00175 <span class="comment">// TODO document that array2d operations will try to respect .pitch of destination argument</span>
<a name="l00176"></a>00176
<a name="l00193"></a>00193 <span class="keyword">template</span><<span class="keyword">typename</span> ValueType, <span class="keyword">class</span> MemorySpace, <span class="keyword">class</span> Orientation = cusp::row_major>
<a name="l00194"></a>00194 <span class="keyword">class </span>array2d : <span class="keyword">public</span> cusp::detail::<a class="code" href="classdetail_1_1matrix__base.html">matrix_base</a><int,ValueType,MemorySpace,cusp::array2d_format>
<a name="l00195"></a><a class="code" href="structcusp_1_1array2d_1_1rebind.html">00195</a> {
<a name="l00196"></a>00196 <span class="keyword">typedef</span> <span class="keyword">typename</span> cusp::detail::matrix_base<int,ValueType,MemorySpace,cusp::array2d_format> Parent;
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <span class="keyword">public</span>:
<a name="l00199"></a>00199 <span class="keyword">typedef</span> Orientation orientation;
<a name="l00200"></a>00200
<a name="l00201"></a><a class="code" href="classcusp_1_1array2d.html#af7cce8dd6c5ae0db033ae0987fa1b9e3">00201</a> <span class="keyword">template</span><<span class="keyword">typename</span> MemorySpace2>
<a name="l00202"></a>00202 <span class="keyword">struct </span>rebind { <span class="keyword">typedef</span> <a class="code" href="classcusp_1_1array2d.html">cusp::array2d<ValueType, MemorySpace2, Orientation></a> type; };
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classcusp_1_1array1d.html">cusp::array1d<ValueType, MemorySpace></a> values_array_type;
<a name="l00205"></a><a class="code" href="classcusp_1_1array2d.html#a9da3ab013bfadec962f12f8946582735">00205</a>
<a name="l00208"></a>00208 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classcusp_1_1array2d.html">cusp::array2d<ValueType, MemorySpace, Orientation></a> <a class="code" href="classcusp_1_1array2d.html">container</a>;
<a name="l00209"></a><a class="code" href="classcusp_1_1array2d.html#a3ac44d471332a6e1cf046c1b1a0f31be">00209</a>
<a name="l00212"></a>00212 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classcusp_1_1array2d__view.html">cusp::array2d_view<typename values_array_type::view, Orientation></a> <a class="code" href="classcusp_1_1array2d__view.html">view</a>;
<a name="l00213"></a><a class="code" href="classcusp_1_1array2d.html#a078789ac2ccb28a229f87d83d9f874df">00213</a>
<a name="l00216"></a>00216 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classcusp_1_1array2d__view.html">cusp::array2d_view<typename values_array_type::const_view, Orientation></a> <a class="code" href="classcusp_1_1array2d__view.html">const_view</a>;
<a name="l00217"></a><a class="code" href="classcusp_1_1array2d.html#a50d10fe0e3cd7d7c2e857ad34e7a1627">00217</a>
<a name="l00220"></a>00220 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structcusp_1_1detail_1_1row__view.html">cusp::detail::row_view<typename values_array_type::iterator,Orientation></a> <a class="code" href="structcusp_1_1detail_1_1row__view.html">row_view</a>;
<a name="l00221"></a>00221
<a name="l00224"></a>00224 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structcusp_1_1detail_1_1column__view.html">cusp::detail::column_view<typename values_array_type::iterator,Orientation></a> <a class="code" href="structcusp_1_1detail_1_1column__view.html">column_view</a>;
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <a class="code" href="classcusp_1_1array1d.html">values_array_type</a> values;
<a name="l00227"></a>00227
<a name="l00228"></a>00228 <span class="comment">// minor_dimension + padding</span>
<a name="l00229"></a>00229 <span class="keywordtype">size_t</span> pitch;
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="comment">// construct empty matrix</span>
<a name="l00232"></a>00232 <a class="code" href="classcusp_1_1array2d.html">array2d</a>()
<a name="l00233"></a>00233 : Parent(), pitch(0), values(0) {}
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="comment">// construct matrix with given shape and number of entries</span>
<a name="l00236"></a>00236 <a class="code" href="classcusp_1_1array2d.html">array2d</a>(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols)
<a name="l00237"></a>00237 : Parent(num_rows, num_cols, num_rows * num_cols),
<a name="l00238"></a>00238 pitch(cusp::detail::minor_dimension(num_rows, num_cols, orientation())),
<a name="l00239"></a>00239 values(num_rows * num_cols) {}
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="comment">// construct matrix with given shape and number of entries and fill with a given value</span>
<a name="l00242"></a>00242 array2d(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols, <span class="keyword">const</span> ValueType& value)
<a name="l00243"></a>00243 : Parent(num_rows, num_cols, num_rows * num_cols),
<a name="l00244"></a>00244 pitch(cusp::detail::minor_dimension(num_rows, num_cols, orientation())),
<a name="l00245"></a>00245 values(num_rows * num_cols, value) {}
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="comment">// construct from another matrix</span>
<a name="l00248"></a>00248 <span class="keyword">template</span> <<span class="keyword">typename</span> MatrixType>
<a name="l00249"></a>00249 array2d(<span class="keyword">const</span> MatrixType& matrix);
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="keyword">typename</span> values_array_type::reference operator()(<span class="keyword">const</span> <span class="keywordtype">size_t</span> i, <span class="keyword">const</span> <span class="keywordtype">size_t</span> j)
<a name="l00252"></a>00252 {
<a name="l00253"></a>00253 <span class="keywordflow">return</span> values[cusp::detail::index_of(i, j, pitch, orientation())];
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="keyword">typename</span> values_array_type::const_reference operator()(<span class="keyword">const</span> <span class="keywordtype">size_t</span> i, <span class="keyword">const</span> <span class="keywordtype">size_t</span> j)<span class="keyword"> const</span>
<a name="l00257"></a>00257 <span class="keyword"> </span>{
<a name="l00258"></a>00258 <span class="keywordflow">return</span> values[cusp::detail::index_of(i, j, pitch, orientation())];
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="keywordtype">void</span> resize(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols, <span class="keywordtype">size_t</span> pitch)
<a name="l00262"></a>00262 {
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (pitch < cusp::detail::minor_dimension(num_rows, num_cols, orientation()))
<a name="l00264"></a>00264 <span class="keywordflow">throw</span> <a class="code" href="classcusp_1_1invalid__input__exception.html">cusp::invalid_input_exception</a>(<span class="stringliteral">"pitch cannot be less than minor dimension"</span>);
<a name="l00265"></a>00265
<a name="l00266"></a>00266 values.resize(pitch * cusp::detail::major_dimension(num_rows, num_cols, orientation()));
<a name="l00267"></a>00267
<a name="l00268"></a>00268 this->num_rows = num_rows;
<a name="l00269"></a>00269 this->num_cols = num_cols;
<a name="l00270"></a>00270 this->pitch = pitch;
<a name="l00271"></a>00271 this->num_entries = num_rows * num_cols;
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keywordtype">void</span> resize(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols)
<a name="l00275"></a>00275 {
<a name="l00276"></a>00276 <span class="comment">// preserve .pitch if possible</span>
<a name="l00277"></a>00277 <span class="keywordflow">if</span> (this->num_rows == num_rows && this->num_cols == num_cols)
<a name="l00278"></a>00278 <span class="keywordflow">return</span>;
<a name="l00279"></a>00279
<a name="l00280"></a>00280 resize(num_rows, num_cols, cusp::detail::minor_dimension(num_rows, num_cols, orientation()));
<a name="l00281"></a>00281 }
<a name="l00282"></a>00282
<a name="l00283"></a>00283 <span class="keywordtype">void</span> swap(array2d& matrix)
<a name="l00284"></a>00284 {
<a name="l00285"></a>00285 Parent::swap(matrix);
<a name="l00286"></a>00286 thrust::swap(this->pitch, matrix.pitch);
<a name="l00287"></a>00287 values.swap(matrix.values);
<a name="l00288"></a>00288 }
<a name="l00289"></a>00289
<a name="l00290"></a>00290 <a class="code" href="classcusp_1_1array2d.html#a078789ac2ccb28a229f87d83d9f874df">row_view</a> row(<span class="keywordtype">size_t</span> i)
<a name="l00291"></a>00291 {
<a name="l00292"></a>00292 <span class="keywordflow">return</span> <a class="code" href="classcusp_1_1array2d.html#a078789ac2ccb28a229f87d83d9f874df">row_view</a>(*<span class="keyword">this</span>, i);
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294
<a name="l00295"></a>00295 <a class="code" href="classcusp_1_1array2d.html#a50d10fe0e3cd7d7c2e857ad34e7a1627">column_view</a> column(<span class="keywordtype">size_t</span> i)
<a name="l00296"></a>00296 {
<a name="l00297"></a>00297 <span class="keywordflow">return</span> <a class="code" href="classcusp_1_1array2d.html#a50d10fe0e3cd7d7c2e857ad34e7a1627">column_view</a>(*<span class="keyword">this</span>, i);
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299
<a name="l00300"></a>00300 array2d& operator=(<span class="keyword">const</span> array2d& matrix);
<a name="l00301"></a>00301
<a name="l00302"></a>00302 <span class="keyword">template</span> <<span class="keyword">typename</span> MatrixType>
<a name="l00303"></a>00303 array2d& operator=(<span class="keyword">const</span> MatrixType& matrix);
<a name="l00304"></a>00304
<a name="l00305"></a>00305 }; <span class="comment">// class array2d</span>
<a name="l00321"></a>00321 <span class="comment"></span><span class="keyword">template</span><<span class="keyword">typename</span> Array, <span class="keyword">class</span> Orientation = cusp::row_major>
<a name="l00322"></a>00322 <span class="keyword">class </span>array2d_view : <span class="keyword">public</span> cusp::detail::<a class="code" href="classdetail_1_1matrix__base.html">matrix_base</a><int, typename Array::value_type,typename Array::memory_space, cusp::array2d_format>
<a name="l00323"></a>00323 {
<a name="l00324"></a>00324 <span class="keyword">typedef</span> cusp::detail::matrix_base<int, typename Array::value_type,typename Array::memory_space, cusp::array2d_format> Parent;
<a name="l00325"></a>00325 <span class="keyword">public</span>:
<a name="l00326"></a>00326 <span class="keyword">typedef</span> Orientation orientation;
<a name="l00327"></a><a class="code" href="classcusp_1_1array2d__view.html#a359eb7c083fff877b849ef0bb3a3521b">00327</a>
<a name="l00328"></a>00328 <span class="keyword">typedef</span> Array values_array_type;
<a name="l00329"></a>00329
<a name="l00330"></a>00330 values_array_type values;
<a name="l00331"></a><a class="code" href="classcusp_1_1array2d__view.html#a533800c66b9ae875097c0f7eb739839a">00331</a>
<a name="l00334"></a>00334 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classcusp_1_1array2d.html">cusp::array2d<typename Parent::value_type, typename Parent::memory_space, Orientation></a> <a class="code" href="classcusp_1_1array2d.html">container</a>;
<a name="l00335"></a><a class="code" href="classcusp_1_1array2d__view.html#a13f83581eb2f3927874bcf568c1c3df8">00335</a>
<a name="l00338"></a>00338 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classcusp_1_1array2d__view.html">cusp::array2d_view<Array, Orientation></a> <a class="code" href="classcusp_1_1array2d__view.html">view</a>;
<a name="l00339"></a><a class="code" href="classcusp_1_1array2d__view.html#ab227ffee7fbf26036d3d5f1454e15561">00339</a>
<a name="l00342"></a>00342 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structcusp_1_1detail_1_1row__view.html">cusp::detail::row_view<typename values_array_type::iterator,Orientation></a> <a class="code" href="structcusp_1_1detail_1_1row__view.html">row_view</a>;
<a name="l00343"></a>00343
<a name="l00346"></a>00346 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structcusp_1_1detail_1_1column__view.html">cusp::detail::column_view<typename values_array_type::iterator,Orientation></a> <a class="code" href="structcusp_1_1detail_1_1column__view.html">column_view</a>;
<a name="l00347"></a>00347
<a name="l00348"></a>00348 <span class="comment">// minor_dimension + padding</span>
<a name="l00349"></a>00349 <span class="keywordtype">size_t</span> pitch;
<a name="l00350"></a>00350
<a name="l00351"></a>00351 <span class="comment">// construct empty view</span>
<a name="l00352"></a>00352 <a class="code" href="classcusp_1_1array2d__view.html">array2d_view</a>(<span class="keywordtype">void</span>)
<a name="l00353"></a>00353 : Parent(), values(0), pitch(0) {}
<a name="l00354"></a>00354
<a name="l00355"></a>00355 <a class="code" href="classcusp_1_1array2d__view.html">array2d_view</a>(<span class="keyword">const</span> <a class="code" href="classcusp_1_1array2d__view.html">array2d_view</a>& a)
<a name="l00356"></a>00356 : Parent(a), values(a.values), pitch(a.pitch) {}
<a name="l00357"></a>00357
<a name="l00358"></a>00358 <span class="comment">// TODO handle different Orientation (pitch = major)</span>
<a name="l00359"></a>00359 <span class="comment">//template <typename Array2, typename Orientation2></span>
<a name="l00360"></a>00360 <span class="comment">//array2d_view(const array2d_view<Array2,Orientation2>& A)</span>
<a name="l00361"></a>00361
<a name="l00362"></a>00362 <span class="comment">// TODO check values.size()</span>
<a name="l00363"></a>00363
<a name="l00364"></a>00364 <span class="comment">// construct from array2d container</span>
<a name="l00365"></a>00365 array2d_view( array2d<typename Parent::value_type, typename Parent::memory_space, orientation>& a)
<a name="l00366"></a>00366 : Parent(a), values(a.values), pitch(a.pitch) {}
<a name="l00367"></a>00367
<a name="l00368"></a>00368 array2d_view(<span class="keyword">const</span> array2d<typename Parent::value_type, typename Parent::memory_space, orientation>& a)
<a name="l00369"></a>00369 : Parent(a), values(a.values), pitch(a.pitch) {}
<a name="l00370"></a>00370
<a name="l00371"></a>00371 <span class="keyword">template</span> <<span class="keyword">typename</span> Array2>
<a name="l00372"></a>00372 array2d_view(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols, <span class="keywordtype">size_t</span> pitch, Array2& values)
<a name="l00373"></a>00373 : Parent(num_rows, num_cols, num_rows * num_cols), pitch(pitch), values(values) {}
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="keyword">template</span> <<span class="keyword">typename</span> Array2>
<a name="l00376"></a>00376 array2d_view(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols, <span class="keywordtype">size_t</span> pitch, <span class="keyword">const</span> Array2& values)
<a name="l00377"></a>00377 : Parent(num_rows, num_cols, num_rows * num_cols), pitch(pitch), values(values) {}
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keyword">typename</span> values_array_type::reference operator()(<span class="keyword">const</span> <span class="keywordtype">size_t</span> i, <span class="keyword">const</span> <span class="keywordtype">size_t</span> j)<span class="keyword"> const</span>
<a name="l00380"></a>00380 <span class="keyword"> </span>{
<a name="l00381"></a>00381 <span class="keywordflow">return</span> values[detail::index_of(i, j, pitch, orientation())];
<a name="l00382"></a>00382 }
<a name="l00383"></a>00383
<a name="l00384"></a>00384 <span class="keywordtype">void</span> resize(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols, <span class="keywordtype">size_t</span> pitch)
<a name="l00385"></a>00385 {
<a name="l00386"></a>00386 <span class="keywordflow">if</span> (pitch < cusp::detail::minor_dimension(num_rows, num_cols, orientation()))
<a name="l00387"></a>00387 <span class="keywordflow">throw</span> <a class="code" href="classcusp_1_1invalid__input__exception.html">cusp::invalid_input_exception</a>(<span class="stringliteral">"pitch cannot be less than minor dimension"</span>);
<a name="l00388"></a>00388
<a name="l00389"></a>00389 values.resize(pitch * cusp::detail::major_dimension(num_rows, num_cols, orientation()));
<a name="l00390"></a>00390
<a name="l00391"></a>00391 this->num_rows = num_rows;
<a name="l00392"></a>00392 this->num_cols = num_cols;
<a name="l00393"></a>00393 this->pitch = pitch;
<a name="l00394"></a>00394 this->num_entries = num_rows * num_cols;
<a name="l00395"></a>00395 }
<a name="l00396"></a>00396
<a name="l00397"></a>00397 <span class="keywordtype">void</span> resize(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols)
<a name="l00398"></a>00398 {
<a name="l00399"></a>00399 <span class="comment">// preserve .pitch if possible</span>
<a name="l00400"></a>00400 <span class="keywordflow">if</span> (this->num_rows == num_rows && this->num_cols == num_cols)
<a name="l00401"></a>00401 <span class="keywordflow">return</span>;
<a name="l00402"></a>00402
<a name="l00403"></a>00403 resize(num_rows, num_cols, cusp::detail::minor_dimension(num_rows, num_cols, orientation()));
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <a class="code" href="classcusp_1_1array2d__view.html#a13f83581eb2f3927874bcf568c1c3df8">row_view</a> row(<span class="keywordtype">size_t</span> i)<span class="keyword"> const</span>
<a name="l00407"></a>00407 <span class="keyword"> </span>{
<a name="l00408"></a>00408 <span class="keywordflow">return</span> <a class="code" href="classcusp_1_1array2d__view.html#a13f83581eb2f3927874bcf568c1c3df8">row_view</a>(*<span class="keyword">this</span>, i);
<a name="l00409"></a>00409 }
<a name="l00410"></a>00410
<a name="l00411"></a>00411 <a class="code" href="classcusp_1_1array2d__view.html#ab227ffee7fbf26036d3d5f1454e15561">column_view</a> column(<span class="keywordtype">size_t</span> i)<span class="keyword"> const</span>
<a name="l00412"></a>00412 <span class="keyword"> </span>{
<a name="l00413"></a>00413 <span class="keywordflow">return</span> <a class="code" href="classcusp_1_1array2d__view.html#ab227ffee7fbf26036d3d5f1454e15561">column_view</a>(*<span class="keyword">this</span>, i);
<a name="l00414"></a>00414 }
<a name="l00415"></a>00415 }; <span class="comment">// class array2d_view</span>
<a name="l00416"></a>00416
<a name="l00417"></a>00417
<a name="l00418"></a>00418
<a name="l00419"></a>00419 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> Orientation>
<a name="l00420"></a>00420 array2d_view<typename cusp::array1d_view<Iterator>,Orientation>
<a name="l00421"></a>00421 make_array2d_view(<span class="keywordtype">size_t</span> num_rows, <span class="keywordtype">size_t</span> num_cols, <span class="keywordtype">size_t</span> pitch, <span class="keyword">const</span> <a class="code" href="classcusp_1_1array1d__view.html">cusp::array1d_view<Iterator></a>& values, Orientation)
<a name="l00422"></a>00422 {
<a name="l00423"></a>00423 <span class="keywordflow">return</span> array2d_view<typename cusp::array1d_view<Iterator>,Orientation>(num_rows, num_cols, pitch, values);
<a name="l00424"></a>00424 }
<a name="l00425"></a>00425
<a name="l00426"></a>00426 <span class="keyword">template</span> <<span class="keyword">typename</span> Array, <span class="keyword">typename</span> Orientation>
<a name="l00427"></a>00427 array2d_view<Array,Orientation>
<a name="l00428"></a>00428 make_array2d_view(<span class="keyword">const</span> array2d_view<Array, Orientation>& a)
<a name="l00429"></a>00429 {
<a name="l00430"></a>00430 <span class="keywordflow">return</span> array2d_view<Array,Orientation>(a);
<a name="l00431"></a>00431 }
<a name="l00432"></a>00432
<a name="l00433"></a>00433 <span class="keyword">template</span><<span class="keyword">typename</span> ValueType, <span class="keyword">class</span> MemorySpace, <span class="keyword">class</span> Orientation>
<a name="l00434"></a>00434 array2d_view<typename cusp::array1d_view<typename cusp::array1d<ValueType,MemorySpace>::iterator >, Orientation>
<a name="l00435"></a>00435 make_array2d_view(<a class="code" href="classcusp_1_1array2d.html">cusp::array2d<ValueType,MemorySpace,Orientation></a>& a)
<a name="l00436"></a>00436 {
<a name="l00437"></a>00437 <span class="keywordflow">return</span> cusp::make_array2d_view(a.num_rows, a.num_cols, a.pitch, cusp::make_array1d_view(a.values), Orientation());
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439
<a name="l00440"></a>00440 <span class="keyword">template</span><<span class="keyword">typename</span> ValueType, <span class="keyword">class</span> MemorySpace, <span class="keyword">class</span> Orientation>
<a name="l00441"></a>00441 array2d_view<typename cusp::array1d_view<typename cusp::array1d<ValueType,MemorySpace>::const_iterator >, Orientation>
<a name="l00442"></a>00442 make_array2d_view(<span class="keyword">const</span> <a class="code" href="classcusp_1_1array2d.html">cusp::array2d<ValueType,MemorySpace,Orientation></a>& a)
<a name="l00443"></a>00443 {
<a name="l00444"></a>00444 <span class="keywordflow">return</span> cusp::make_array2d_view(a.num_rows, a.num_cols, a.pitch, cusp::make_array1d_view(a.values), Orientation());
<a name="l00445"></a>00445 }
<a name="l00449"></a>00449 } <span class="comment">// end namespace cusp</span>
<a name="l00450"></a>00450
<a name="l00451"></a>00451 <span class="preprocessor">#include <cusp/detail/array2d.inl></span>
<a name="l00452"></a>00452
</pre></div></div>
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