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annotate liboctave/Array.h @ 12583:bb29b58e650c release-3-4-x
abandon release-3-4-x branch in favor of workflow using stable and default branches and merging stable to default periodically
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 08 Apr 2011 09:06:04 -0400 |
parents | a21a3875ca83 |
children | 43cc49c7abd1 |
rev | line source |
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1993 | 1 // Template array classes |
228 | 2 /* |
3 | |
11523 | 4 Copyright (C) 1993-2011 John W. Eaton |
5 Copyright (C) 2008-2009 Jaroslav Hajek | |
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6 Copyright (C) 2010 VZLU Prague |
228 | 7 |
8 This file is part of Octave. | |
9 | |
10 Octave is free software; you can redistribute it and/or modify it | |
11 under the terms of the GNU General Public License as published by the | |
7016 | 12 Free Software Foundation; either version 3 of the License, or (at your |
13 option) any later version. | |
228 | 14 |
15 Octave is distributed in the hope that it will be useful, but WITHOUT | |
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 for more details. | |
19 | |
20 You should have received a copy of the GNU General Public License | |
7016 | 21 along with Octave; see the file COPYING. If not, see |
22 <http://www.gnu.org/licenses/>. | |
228 | 23 |
24 */ | |
25 | |
382 | 26 #if !defined (octave_Array_h) |
27 #define octave_Array_h 1 | |
28 | |
1366 | 29 #include <cassert> |
4152 | 30 #include <cstddef> |
3613 | 31 |
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32 #include <algorithm> |
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33 #include <iosfwd> |
3933 | 34 |
4513 | 35 #include "dim-vector.h" |
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36 #include "idx-vector.h" |
8725 | 37 #include "lo-traits.h" |
3613 | 38 #include "lo-utils.h" |
7433 | 39 #include "oct-sort.h" |
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40 #include "quit.h" |
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41 #include "oct-mem.h" |
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42 #include "oct-refcount.h" |
7433 | 43 |
1359 | 44 // One dimensional array class. Handles the reference counting for |
45 // all the derived classes. | |
238 | 46 |
228 | 47 template <class T> |
3585 | 48 class |
49 Array | |
228 | 50 { |
3504 | 51 protected: |
1619 | 52 |
4513 | 53 //-------------------------------------------------------------------- |
54 // The real representation of all arrays. | |
55 //-------------------------------------------------------------------- | |
1735 | 56 |
57 class ArrayRep | |
58 { | |
59 public: | |
60 | |
61 T *data; | |
5275 | 62 octave_idx_type len; |
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63 octave_refcount<int> count; |
1735 | 64 |
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65 ArrayRep (T *d, octave_idx_type l) |
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66 : data (no_ctor_new<T> (l)), len (l), count (1) |
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67 { |
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68 copy_or_memcpy (l, d, data); |
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69 } |
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70 |
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71 template <class U> |
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72 ArrayRep (U *d, octave_idx_type l) |
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73 : data (no_ctor_new<T> (l)), len (l), count (1) |
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74 { |
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75 std::copy (d, d+l, data); |
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76 } |
1735 | 77 |
78 ArrayRep (void) : data (0), len (0), count (1) { } | |
79 | |
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80 explicit ArrayRep (octave_idx_type n) : data (no_ctor_new<T> (n)), len (n), count (1) { } |
1735 | 81 |
5275 | 82 explicit ArrayRep (octave_idx_type n, const T& val) |
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83 : data (no_ctor_new<T> (n)), len (n), count (1) |
4513 | 84 { |
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85 fill_or_memset (n, val, data); |
4513 | 86 } |
87 | |
1735 | 88 ArrayRep (const ArrayRep& a) |
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89 : data (no_ctor_new<T> (a.len)), len (a.len), count (1) |
4513 | 90 { |
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91 copy_or_memcpy (a.len, a.data, data); |
4513 | 92 } |
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93 |
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94 ~ArrayRep (void) { no_ctor_delete<T> (data); } |
1735 | 95 |
5275 | 96 octave_idx_type length (void) const { return len; } |
1735 | 97 |
4517 | 98 private: |
99 | |
100 // No assignment! | |
101 | |
102 ArrayRep& operator = (const ArrayRep& a); | |
1735 | 103 }; |
104 | |
4513 | 105 //-------------------------------------------------------------------- |
106 | |
6884 | 107 public: |
108 | |
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109 void make_unique (void) |
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110 { |
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111 if (rep->count > 1) |
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112 { |
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113 --rep->count; |
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114 rep = new ArrayRep (slice_data, slice_len); |
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115 slice_data = rep->data; |
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116 } |
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117 } |
238 | 118 |
5900 | 119 typedef T element_type; |
120 | |
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121 typedef typename ref_param<T>::type crefT; |
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122 |
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124 typename ref_param<T>::type); |
8725 | 125 |
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126 protected: |
4902 | 127 |
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128 dim_vector dimensions; |
4518 | 129 |
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130 typename Array<T>::ArrayRep *rep; |
4513 | 131 |
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132 // Rationale: |
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133 // slice_data is a pointer to rep->data, denoting together with slice_len the |
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134 // actual portion of the data referenced by this Array<T> object. This allows |
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135 // to make shallow copies not only of a whole array, but also of contiguous |
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136 // subranges. Every time rep is directly manipulated, slice_data and slice_len |
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137 // need to be properly updated. |
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138 |
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139 T* slice_data; |
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140 octave_idx_type slice_len; |
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141 |
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142 // slice constructor |
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143 Array (const Array<T>& a, const dim_vector& dv, |
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144 octave_idx_type l, octave_idx_type u) |
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145 : dimensions (dv), rep(a.rep), slice_data (a.slice_data+l), slice_len (u-l) |
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146 { |
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147 rep->count++; |
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148 dimensions.chop_trailing_singletons (); |
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149 } |
4513 | 150 |
151 private: | |
152 | |
4585 | 153 typename Array<T>::ArrayRep *nil_rep (void) const |
4513 | 154 { |
155 static typename Array<T>::ArrayRep *nr | |
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156 = new typename Array<T>::ArrayRep (); |
4513 | 157 |
158 return nr; | |
1550 | 159 } |
238 | 160 |
228 | 161 public: |
238 | 162 |
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163 // Empty ctor (0x0). |
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164 |
1550 | 165 Array (void) |
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166 : dimensions (), rep (nil_rep ()), slice_data (rep->data), |
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167 slice_len (rep->len) |
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168 { |
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169 rep->count++; |
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170 } |
1550 | 171 |
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172 // Obsolete 1D ctor (there are no 1D arrays). |
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173 explicit Array (octave_idx_type n) GCC_ATTR_DEPRECATED |
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174 : dimensions (n, 1), rep (new typename Array<T>::ArrayRep (n)), |
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175 slice_data (rep->data), slice_len (rep->len) |
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176 { } |
1619 | 177 |
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178 // Obsolete initialized 1D ctor (there are no 1D arrays). |
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179 explicit Array (octave_idx_type n, const T& val) GCC_ATTR_DEPRECATED |
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180 : dimensions (n, 1), rep (new typename Array<T>::ArrayRep (n)), |
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181 slice_data (rep->data), slice_len (rep->len) |
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182 { |
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183 fill (val); |
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184 } |
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185 |
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186 // nD uninitialized ctor. |
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187 explicit Array (const dim_vector& dv) |
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188 : dimensions (dv), |
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189 rep (new typename Array<T>::ArrayRep (dv.safe_numel ())), |
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190 slice_data (rep->data), slice_len (rep->len) |
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191 { |
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192 dimensions.chop_trailing_singletons (); |
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193 } |
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194 |
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195 // nD initialized ctor. |
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196 explicit Array (const dim_vector& dv, const T& val) |
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197 : dimensions (dv), |
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198 rep (new typename Array<T>::ArrayRep (dv.safe_numel ())), |
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199 slice_data (rep->data), slice_len (rep->len) |
4513 | 200 { |
201 fill (val); | |
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202 dimensions.chop_trailing_singletons (); |
4513 | 203 } |
204 | |
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205 // Reshape constructor. |
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206 Array (const Array<T>& a, const dim_vector& dv); |
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207 |
4902 | 208 // Type conversion case. |
209 template <class U> | |
210 Array (const Array<U>& a) | |
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211 : dimensions (a.dims ()), |
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212 rep (new typename Array<T>::ArrayRep (a.data (), a.length ())), |
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213 slice_data (rep->data), slice_len (rep->len) |
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214 { } |
4902 | 215 |
216 // No type conversion case. | |
4513 | 217 Array (const Array<T>& a) |
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218 : dimensions (a.dimensions), rep (a.rep), slice_data (a.slice_data), |
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219 slice_len (a.slice_len) |
4513 | 220 { |
221 rep->count++; | |
1550 | 222 } |
223 | |
4513 | 224 public: |
225 | |
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226 ~Array (void) |
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227 { |
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228 if (--rep->count <= 0) |
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229 delete rep; |
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230 } |
228 | 231 |
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232 Array<T>& operator = (const Array<T>& a) |
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233 { |
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234 if (this != &a) |
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235 { |
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236 if (--rep->count <= 0) |
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237 delete rep; |
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238 |
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239 rep = a.rep; |
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240 rep->count++; |
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241 |
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242 dimensions = a.dimensions; |
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243 slice_data = a.slice_data; |
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244 slice_len = a.slice_len; |
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245 } |
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246 |
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247 return *this; |
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248 } |
4513 | 249 |
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250 void fill (const T& val); |
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251 |
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252 void clear (void); |
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253 void clear (const dim_vector& dv); |
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254 |
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255 void clear (octave_idx_type r, octave_idx_type c) |
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256 { clear (dim_vector (r, c)); } |
238 | 257 |
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258 octave_idx_type capacity (void) const { return slice_len; } |
5275 | 259 octave_idx_type length (void) const { return capacity (); } |
260 octave_idx_type nelem (void) const { return capacity (); } | |
261 octave_idx_type numel (void) const { return nelem (); } | |
4513 | 262 |
5275 | 263 octave_idx_type dim1 (void) const { return dimensions(0); } |
264 octave_idx_type dim2 (void) const { return dimensions(1); } | |
265 octave_idx_type dim3 (void) const { return dimensions(2); } | |
4513 | 266 |
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267 // Return the array as a column vector. |
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268 Array<T> as_column (void) const |
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269 { |
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270 Array<T> retval (*this); |
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271 if (dimensions.length () != 2 || dimensions(1) != 1) |
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272 retval.dimensions = dim_vector (numel (), 1); |
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273 |
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274 return retval; |
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275 } |
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276 |
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277 // Return the array as a row vector. |
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278 Array<T> as_row (void) const |
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279 { |
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280 Array<T> retval (*this); |
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281 if (dimensions.length () != 2 || dimensions(0) != 1) |
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282 retval.dimensions = dim_vector (1, numel ()); |
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283 |
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284 return retval; |
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285 } |
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286 |
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287 // Return the array as a matrix. |
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288 Array<T> as_matrix (void) const |
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289 { |
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290 Array<T> retval (*this); |
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291 if (dimensions.length () != 2) |
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292 retval.dimensions = dimensions.redim (2); |
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293 |
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294 return retval; |
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295 } |
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296 |
5275 | 297 octave_idx_type rows (void) const { return dim1 (); } |
298 octave_idx_type cols (void) const { return dim2 (); } | |
299 octave_idx_type columns (void) const { return dim2 (); } | |
300 octave_idx_type pages (void) const { return dim3 (); } | |
4513 | 301 |
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302 size_t byte_size (void) const { return static_cast<size_t> (numel ()) * sizeof (T); } |
4902 | 303 |
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304 // Return a const-reference so that dims ()(i) works efficiently. |
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305 const dim_vector& dims (void) const { return dimensions; } |
4513 | 306 |
4532 | 307 Array<T> squeeze (void) const; |
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308 |
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309 void chop_trailing_singletons (void) GCC_ATTR_DEPRECATED |
4703 | 310 { dimensions.chop_trailing_singletons (); } |
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311 |
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312 octave_idx_type compute_index (octave_idx_type i, octave_idx_type j) const; |
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313 octave_idx_type compute_index (octave_idx_type i, octave_idx_type j, octave_idx_type k) const; |
5275 | 314 octave_idx_type compute_index (const Array<octave_idx_type>& ra_idx) const; |
4517 | 315 |
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316 octave_idx_type compute_index_unchecked (const Array<octave_idx_type>& ra_idx) const |
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317 { return dimensions.compute_index (ra_idx.data (), ra_idx.length ()); } |
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318 |
2108 | 319 // No checking, even for multiple references, ever. |
320 | |
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321 T& xelem (octave_idx_type n) { return slice_data [n]; } |
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322 crefT xelem (octave_idx_type n) const { return slice_data [n]; } |
2108 | 323 |
5275 | 324 T& xelem (octave_idx_type i, octave_idx_type j) { return xelem (dim1()*j+i); } |
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325 crefT xelem (octave_idx_type i, octave_idx_type j) const { return xelem (dim1()*j+i); } |
4513 | 326 |
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327 T& xelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) |
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328 { return xelem (i, dim2()*k+j); } |
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329 crefT xelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const |
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330 { return xelem (i, dim2()*k+j); } |
4513 | 331 |
6867 | 332 T& xelem (const Array<octave_idx_type>& ra_idx) |
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333 { return xelem (compute_index_unchecked (ra_idx)); } |
4513 | 334 |
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335 crefT xelem (const Array<octave_idx_type>& ra_idx) const |
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336 { return xelem (compute_index_unchecked (ra_idx)); } |
4513 | 337 |
5775 | 338 // FIXME -- would be nice to fix this so that we don't |
2006 | 339 // unnecessarily force a copy, but that is not so easy, and I see no |
340 // clean way to do it. | |
341 | |
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342 T& checkelem (octave_idx_type n); |
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343 T& checkelem (octave_idx_type i, octave_idx_type j); |
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344 T& checkelem (octave_idx_type i, octave_idx_type j, octave_idx_type k); |
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345 T& checkelem (const Array<octave_idx_type>& ra_idx); |
4513 | 346 |
5275 | 347 T& elem (octave_idx_type n) |
2108 | 348 { |
349 make_unique (); | |
2109 | 350 return xelem (n); |
2108 | 351 } |
2306 | 352 |
5275 | 353 T& elem (octave_idx_type i, octave_idx_type j) { return elem (dim1()*j+i); } |
4513 | 354 |
5275 | 355 T& elem (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return elem (i, dim2()*k+j); } |
4513 | 356 |
6867 | 357 T& elem (const Array<octave_idx_type>& ra_idx) |
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358 { return Array<T>::elem (compute_index_unchecked (ra_idx)); } |
4513 | 359 |
2306 | 360 #if defined (BOUNDS_CHECKING) |
5275 | 361 T& operator () (octave_idx_type n) { return checkelem (n); } |
362 T& operator () (octave_idx_type i, octave_idx_type j) { return checkelem (i, j); } | |
363 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return checkelem (i, j, k); } | |
6867 | 364 T& operator () (const Array<octave_idx_type>& ra_idx) { return checkelem (ra_idx); } |
2306 | 365 #else |
5275 | 366 T& operator () (octave_idx_type n) { return elem (n); } |
367 T& operator () (octave_idx_type i, octave_idx_type j) { return elem (i, j); } | |
368 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return elem (i, j, k); } | |
6867 | 369 T& operator () (const Array<octave_idx_type>& ra_idx) { return elem (ra_idx); } |
2006 | 370 #endif |
371 | |
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372 crefT checkelem (octave_idx_type n) const; |
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373 crefT checkelem (octave_idx_type i, octave_idx_type j) const; |
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374 crefT checkelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const; |
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375 crefT checkelem (const Array<octave_idx_type>& ra_idx) const; |
4513 | 376 |
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377 crefT elem (octave_idx_type n) const { return xelem (n); } |
2306 | 378 |
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379 crefT elem (octave_idx_type i, octave_idx_type j) const { return xelem (i, j); } |
4513 | 380 |
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381 crefT elem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return xelem (i, j, k); } |
4513 | 382 |
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383 crefT elem (const Array<octave_idx_type>& ra_idx) const |
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384 { return Array<T>::xelem (compute_index_unchecked (ra_idx)); } |
4513 | 385 |
2108 | 386 #if defined (BOUNDS_CHECKING) |
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387 crefT operator () (octave_idx_type n) const { return checkelem (n); } |
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388 crefT operator () (octave_idx_type i, octave_idx_type j) const { return checkelem (i, j); } |
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389 crefT operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return checkelem (i, j, k); } |
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390 crefT operator () (const Array<octave_idx_type>& ra_idx) const { return checkelem (ra_idx); } |
2006 | 391 #else |
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392 crefT operator () (octave_idx_type n) const { return elem (n); } |
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393 crefT operator () (octave_idx_type i, octave_idx_type j) const { return elem (i, j); } |
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394 crefT operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return elem (i, j, k); } |
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395 crefT operator () (const Array<octave_idx_type>& ra_idx) const { return elem (ra_idx); } |
2006 | 396 #endif |
397 | |
9731 | 398 // Fast extractors. All of these produce shallow copies. |
399 // Warning: none of these do check bounds, unless BOUNDS_CHECKING is on! | |
400 | |
401 // Extract column: A(:,k+1). | |
402 Array<T> column (octave_idx_type k) const; | |
403 // Extract page: A(:,:,k+1). | |
404 Array<T> page (octave_idx_type k) const; | |
405 | |
406 // Extract a slice from this array as a column vector: A(:)(lo+1:up). | |
407 // Must be 0 <= lo && up <= numel. May be up < lo. | |
408 Array<T> linear_slice (octave_idx_type lo, octave_idx_type up) const; | |
409 | |
10352 | 410 Array<T> reshape (octave_idx_type nr, octave_idx_type nc) const |
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411 { return Array<T> (*this, dim_vector (nr, nc)); } |
10352 | 412 |
9731 | 413 Array<T> reshape (const dim_vector& new_dims) const |
414 { return Array<T> (*this, new_dims); } | |
4567 | 415 |
5275 | 416 Array<T> permute (const Array<octave_idx_type>& vec, bool inv = false) const; |
417 Array<T> ipermute (const Array<octave_idx_type>& vec) const | |
4593 | 418 { return permute (vec, true); } |
419 | |
4513 | 420 bool is_square (void) const { return (dim1 () == dim2 ()); } |
421 | |
4559 | 422 bool is_empty (void) const { return numel () == 0; } |
423 | |
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424 bool is_vector (void) const { return dimensions.is_vector (); } |
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425 |
4513 | 426 Array<T> transpose (void) const; |
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427 Array<T> hermitian (T (*fcn) (const T&) = 0) const; |
238 | 428 |
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429 const T *data (void) const { return slice_data; } |
228 | 430 |
3952 | 431 const T *fortran_vec (void) const { return data (); } |
432 | |
238 | 433 T *fortran_vec (void); |
1560 | 434 |
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435 bool is_shared (void) { return rep->count > 1; } |
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436 |
4513 | 437 int ndims (void) const { return dimensions.length (); } |
1560 | 438 |
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439 // Indexing without resizing. |
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440 |
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441 Array<T> index (const idx_vector& i) const; |
1560 | 442 |
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443 Array<T> index (const idx_vector& i, const idx_vector& j) const; |
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444 |
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445 Array<T> index (const Array<idx_vector>& ia) const; |
1560 | 446 |
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447 static const T& resize_fill_value (); |
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448 |
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449 // Resizing (with fill). |
1560 | 450 |
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451 void resize1 (octave_idx_type n, const T& rfv = resize_fill_value ()); |
1560 | 452 |
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453 void resize (octave_idx_type n) GCC_ATTR_DEPRECATED |
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454 { resize1 (n); } |
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456 void resize (octave_idx_type nr, octave_idx_type nc, |
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457 const T& rfv = resize_fill_value ()) GCC_ATTR_DEPRECATED |
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458 { |
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459 resize2 (nr, nc, rfv); |
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460 } |
4513 | 461 |
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462 void resize (const dim_vector& dv, const T& rfv = resize_fill_value ()); |
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463 |
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464 // Indexing with possible resizing and fill |
8333 | 465 // FIXME -- this is really a corner case, that should better be |
466 // handled directly in liboctinterp. | |
3933 | 467 |
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468 Array<T> index (const idx_vector& i, bool resize_ok, |
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469 const T& rfv = resize_fill_value ()) const; |
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470 |
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471 Array<T> index (const idx_vector& i, const idx_vector& j, |
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472 bool resize_ok, const T& rfv = resize_fill_value ()) const; |
4513 | 473 |
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474 Array<T> index (const Array<idx_vector>& ia, |
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475 bool resize_ok, const T& rfv = resize_fill_value ()) const; |
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476 |
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477 // Indexed assignment (always with resize & fill). |
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478 |
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479 void assign (const idx_vector& i, const Array<T>& rhs, |
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480 const T& rfv = resize_fill_value ()); |
4513 | 481 |
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482 void assign (const idx_vector& i, const idx_vector& j, const Array<T>& rhs, |
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483 const T& rfv = resize_fill_value ()); |
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484 |
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485 void assign (const Array<idx_vector>& ia, const Array<T>& rhs, |
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486 const T& rfv = resize_fill_value ()); |
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487 |
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488 // Deleting elements. |
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489 |
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490 // A(I) = [] (with a single subscript) |
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491 void delete_elements (const idx_vector& i); |
4530 | 492 |
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493 // A(:,...,I,...,:) = [] (>= 2 subscripts, one of them is non-colon) |
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494 void delete_elements (int dim, const idx_vector& i); |
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495 |
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496 // Dispatcher to the above two. |
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497 void delete_elements (const Array<idx_vector>& ia); |
4513 | 498 |
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499 // Insert an array into another at a specified position. |
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500 // If size (a) is [d1 d2 ... dN] and idx is [i1 i2 ... iN], |
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501 // this method is equivalent to |
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502 // x(i1:i1+d1-1, i2:i2+d2-1, ... , iN:iN+dN-1) = a. |
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503 Array<T>& insert (const Array<T>& a, const Array<octave_idx_type>& idx); |
3928 | 504 |
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505 // This is just a special case for idx = [r c 0 ...] |
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506 Array<T>& insert (const Array<T>& a, octave_idx_type r, octave_idx_type c); |
3933 | 507 |
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508 void maybe_economize (void) |
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509 { |
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510 if (rep->count == 1 && slice_len != rep->len) |
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511 { |
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512 ArrayRep *new_rep = new ArrayRep (slice_data, slice_len); |
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513 delete rep; |
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514 rep = new_rep; |
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515 slice_data = rep->data; |
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516 } |
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517 } |
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518 |
4517 | 519 void print_info (std::ostream& os, const std::string& prefix) const; |
5900 | 520 |
521 // Unsafe. This function exists to support the MEX interface. | |
522 // You should not use it anywhere else. | |
523 void *mex_get_data (void) const { return const_cast<T *> (data ()); } | |
7433 | 524 |
9725 | 525 Array<T> sort (int dim = 0, sortmode mode = ASCENDING) const; |
526 Array<T> sort (Array<octave_idx_type> &sidx, int dim = 0, | |
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527 sortmode mode = ASCENDING) const; |
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528 |
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529 // Ordering is auto-detected or can be specified. |
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530 sortmode is_sorted (sortmode mode = UNSORTED) const; |
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531 |
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532 // Sort by rows returns only indices. |
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533 Array<octave_idx_type> sort_rows_idx (sortmode mode = ASCENDING) const; |
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534 |
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535 // Ordering is auto-detected or can be specified. |
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536 sortmode is_sorted_rows (sortmode mode = UNSORTED) const; |
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537 |
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538 // Do a binary lookup in a sorted array. Must not contain NaNs. |
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539 // Mode can be specified or is auto-detected by comparing 1st and last element. |
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540 octave_idx_type lookup (const T& value, sortmode mode = UNSORTED) const; |
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541 |
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542 // Ditto, but for an array of values, specializing on the case when values |
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543 // are sorted. NaNs get the value N. |
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544 Array<octave_idx_type> lookup (const Array<T>& values, sortmode mode = UNSORTED) const; |
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545 |
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546 // Count nonzero elements. |
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547 octave_idx_type nnz (void) const; |
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548 |
9025 | 549 // Find indices of (at most n) nonzero elements. If n is specified, backward |
550 // specifies search from backward. | |
551 Array<octave_idx_type> find (octave_idx_type n = -1, bool backward = false) const; | |
552 | |
9725 | 553 // Returns the n-th element in increasing order, using the same ordering as |
554 // used for sort. n can either be a scalar index or a contiguous range. | |
555 Array<T> nth_element (const idx_vector& n, int dim = 0) const; | |
556 | |
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557 Array<T> diag (octave_idx_type k = 0) const; |
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558 |
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559 // Concatenation along a specified (0-based) dimension, equivalent to cat(). |
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560 // dim = -1 corresponds to dim = 0 and dim = -2 corresponds to dim = 1, |
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561 // but apply the looser matching rules of vertcat/horzcat. |
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562 static Array<T> |
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563 cat (int dim, octave_idx_type n, const Array<T> *array_list); |
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564 |
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565 template <class U, class F> |
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566 Array<U> |
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567 map (F fcn) const |
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568 { |
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569 octave_idx_type len = length (); |
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570 |
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571 const T *m = data (); |
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572 |
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573 Array<U> result (dims ()); |
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574 U *p = result.fortran_vec (); |
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575 |
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576 octave_idx_type i; |
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577 for (i = 0; i < len - 3; i += 4) |
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578 { |
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579 octave_quit (); |
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580 |
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581 p[i] = fcn (m[i]); |
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582 p[i+1] = fcn (m[i+1]); |
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583 p[i+2] = fcn (m[i+2]); |
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584 p[i+3] = fcn (m[i+3]); |
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585 } |
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586 |
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587 octave_quit (); |
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588 |
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589 for (; i < len; i++) |
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590 p[i] = fcn (m[i]); |
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591 |
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592 return result; |
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593 } |
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594 |
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595 // Overloads for function references. |
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596 template <class U> |
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597 Array<U> |
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598 map (U (&fcn) (T)) const |
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599 { return map<U, U (&) (T)> (fcn); } |
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600 |
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601 template <class U> |
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602 Array<U> |
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603 map (U (&fcn) (const T&)) const |
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604 { return map<U, U (&) (const T&)> (fcn); } |
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605 |
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606 // Generic any/all test functionality with arbitrary predicate. |
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607 template <class F, bool zero> |
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608 bool test (F fcn) const |
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609 { |
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610 octave_idx_type len = length (); |
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611 |
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612 const T *m = data (); |
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613 |
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614 octave_idx_type i; |
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615 for (i = 0; i < len - 3; i += 4) |
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616 { |
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617 octave_quit (); |
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618 |
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619 if (fcn (m[i]) != zero |
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620 || fcn (m[i+1]) != zero |
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621 || fcn (m[i+2]) != zero |
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622 || fcn (m[i+3]) != zero) |
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623 return ! zero; |
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624 |
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625 } |
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626 |
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627 octave_quit (); |
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628 |
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629 for (; i < len; i++) |
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630 if (fcn (m[i]) != zero) |
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631 return ! zero; |
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632 |
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633 return zero; |
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634 } |
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635 |
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636 // Simpler calls. |
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637 template <class F> |
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638 bool test_any (F fcn) const |
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639 { return test<F, false> (fcn); } |
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640 |
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641 template <class F> |
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642 bool test_all (F fcn) const |
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643 { return test<F, true> (fcn); } |
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644 |
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645 // Overloads for function references. |
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646 bool test_any (bool (&fcn) (T)) const |
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647 { return test<bool (&) (T), false> (fcn); } |
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648 |
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649 bool test_any (bool (&fcn) (const T&)) const |
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650 { return test<bool (&) (const T&), false> (fcn); } |
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651 |
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652 bool test_all (bool (&fcn) (T)) const |
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653 { return test<bool (&) (T), true> (fcn); } |
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654 |
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655 bool test_all (bool (&fcn) (const T&)) const |
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656 { return test<bool (&) (const T&), true> (fcn); } |
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657 |
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658 template <class U> friend class Array; |
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659 |
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660 // Returns true if this->dims () == dv, and if so, replaces this->dimensions |
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661 // by a shallow copy of dv. This is useful for maintaining several arrays with |
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662 // supposedly equal dimensions (e.g. structs in the interpreter). |
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663 bool optimize_dimensions (const dim_vector& dv); |
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664 |
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665 private: |
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666 |
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667 void resize2 (octave_idx_type nr, octave_idx_type nc, |
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668 const T& rfv = resize_fill_value ()); |
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669 |
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670 static void instantiation_guard (); |
4513 | 671 }; |
4459 | 672 |
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673 // This is a simple wrapper template that will subclass an Array<T> type or any |
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674 // later type derived from it and override the default non-const operator() to |
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675 // not check for the array's uniqueness. It is, however, the user's |
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676 // responsibility to ensure the array is actually unaliased whenever elements |
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677 // are accessed. |
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678 |
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679 template<class ArrayClass> |
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680 class NoAlias : public ArrayClass |
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681 { |
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682 typedef typename ArrayClass::element_type T; |
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683 public: |
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684 NoAlias () : ArrayClass () { } |
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685 |
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686 // FIXME: this would be simpler once C++0x is available |
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687 template <class X> |
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688 explicit NoAlias (X x) : ArrayClass (x) { } |
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689 |
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690 template <class X, class Y> |
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691 explicit NoAlias (X x, Y y) : ArrayClass (x, y) { } |
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692 |
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693 template <class X, class Y, class Z> |
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694 explicit NoAlias (X x, Y y, Z z) : ArrayClass (x, y, z) { } |
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695 |
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696 T& operator () (octave_idx_type n) |
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697 { return ArrayClass::xelem (n); } |
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698 T& operator () (octave_idx_type i, octave_idx_type j) |
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699 { return ArrayClass::xelem (i, j); } |
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700 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) |
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701 { return ArrayClass::xelem (i, j, k); } |
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702 T& operator () (const Array<octave_idx_type>& ra_idx) |
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703 { return ArrayClass::xelem (ra_idx); } |
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704 }; |
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705 |
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706 template <class T> |
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707 std::ostream& |
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708 operator << (std::ostream& os, const Array<T>& a); |
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709 |
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710 #endif |