Mercurial > octave
annotate liboctave/idx-vector.h @ 10512:aac9f4265048
rewrite sparse indexed assignment
author | Jaroslav Hajek <highegg@gmail.com> |
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date | Tue, 13 Apr 2010 12:36:21 +0200 |
parents | d47802f0e557 |
children | f0266ee4aabe |
rev | line source |
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1 | 1 /* |
2 | |
7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2003, |
4 2004, 2005, 2006, 2007 John W. Eaton | |
8920 | 5 Copyright (C) 2008, 2009 Jaroslav Hajek |
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6 Copyright (C) 2009 VZLU Prague |
1 | 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. | |
1 | 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/>. | |
1 | 23 |
24 */ | |
25 | |
383 | 26 #if !defined (octave_idx_vector_h) |
27 #define octave_idx_vector_h 1 | |
1 | 28 |
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29 #include <cassert> |
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30 |
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31 #include <algorithm> |
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32 #include <iosfwd> |
3503 | 33 |
4653 | 34 #include "dim-vector.h" |
4938 | 35 #include "oct-inttypes.h" |
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36 #include "oct-alloc.h" |
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37 #include "oct-mem.h" |
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38 |
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39 template<class T> class Array; |
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40 template<class T> class Sparse; |
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41 class Range; |
4504 | 42 |
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43 // Design rationale: |
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44 // idx_vector is a reference-counting, polymorphic pointer, that can contain |
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45 // 4 types of index objects: a magic colon, a range, a scalar, or an index vector. |
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46 // Polymorphic methods for single element access are provided, as well as |
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47 // templates implementing "early dispatch", i.e. hoisting the checks for index |
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48 // type out of loops. |
164 | 49 |
453 | 50 class |
6108 | 51 OCTAVE_API |
453 | 52 idx_vector |
1 | 53 { |
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54 public: |
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55 |
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56 enum idx_class_type |
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57 { |
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58 class_invalid = -1, |
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59 class_colon = 0, |
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60 class_range, |
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61 class_scalar, |
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62 class_vector, |
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63 class_mask |
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64 }; |
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65 |
1560 | 66 private: |
67 | |
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68 class OCTAVE_API idx_base_rep |
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69 { |
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70 public: |
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71 idx_base_rep (void) : count (1), err (false) { } |
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72 |
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73 virtual ~idx_base_rep (void) { } |
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74 |
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75 // Non-range-checking element query. |
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76 virtual octave_idx_type xelem (octave_idx_type i) const = 0; |
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77 |
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78 // Range-checking element query. |
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79 virtual octave_idx_type checkelem (octave_idx_type i) const = 0; |
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80 |
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81 // Length of the index vector. |
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82 virtual octave_idx_type length (octave_idx_type n) const = 0; |
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83 |
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84 // The maximum index + 1. The actual dimension is passed in. |
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85 virtual octave_idx_type extent (octave_idx_type n) const = 0; |
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86 |
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87 // Index class. |
8333 | 88 virtual idx_class_type idx_class (void) const { return class_invalid; } |
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89 |
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90 // Sorts, maybe uniqifies, and returns a clone object pointer. |
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91 virtual idx_base_rep *sort_uniq_clone (bool uniq = false) = 0; |
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92 // Sorts, and returns a sorting permutation (aka Array::sort). |
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93 virtual idx_base_rep *sort_idx (Array<octave_idx_type>&) = 0; |
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94 |
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95 // Checks whether the index is colon or a range equivalent to colon. |
10487 | 96 virtual bool is_colon_equiv (octave_idx_type) const { return false; } |
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97 |
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98 // The original dimensions of this object (used when subscribing by matrices). |
10487 | 99 virtual dim_vector orig_dimensions (void) const { return dim_vector (); } |
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100 |
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101 // i/o |
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102 virtual std::ostream& print (std::ostream& os) const = 0; |
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103 |
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104 virtual Array<octave_idx_type> as_array (void); |
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105 |
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106 int count; |
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107 |
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108 bool err; |
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109 |
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110 private: |
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111 |
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112 // No copying! |
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113 idx_base_rep (const idx_base_rep&); |
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114 }; |
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115 |
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116 // The magic colon index. |
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117 class OCTAVE_API idx_colon_rep : public idx_base_rep |
1879 | 118 { |
119 public: | |
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120 idx_colon_rep (void) { } |
1879 | 121 |
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122 idx_colon_rep (char c); |
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123 |
10487 | 124 octave_idx_type xelem (octave_idx_type i) const { return i; } |
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125 |
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126 octave_idx_type checkelem (octave_idx_type i) const; |
1560 | 127 |
10487 | 128 octave_idx_type length (octave_idx_type n) const { return n; } |
1560 | 129 |
10487 | 130 octave_idx_type extent (octave_idx_type n) const { return n; } |
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131 |
8333 | 132 idx_class_type idx_class (void) const { return class_colon; } |
1879 | 133 |
10487 | 134 idx_base_rep *sort_uniq_clone (bool = false) |
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135 { count++; return this; } |
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136 |
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137 idx_base_rep *sort_idx (Array<octave_idx_type>&); |
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138 |
10487 | 139 bool is_colon_equiv (octave_idx_type) const { return true; } |
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140 |
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141 std::ostream& print (std::ostream& os) const; |
4938 | 142 |
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143 private: |
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145 DECLARE_OCTAVE_ALLOCATOR |
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146 |
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147 // No copying! |
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148 idx_colon_rep (const idx_colon_rep& idx); |
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149 }; |
2386 | 150 |
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151 // To distinguish the "direct" constructors that blindly trust the data. |
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152 enum direct { DIRECT }; |
2828 | 153 |
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154 // The integer range index. |
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155 class OCTAVE_API idx_range_rep : public idx_base_rep |
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156 { |
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157 public: |
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158 idx_range_rep (octave_idx_type _start, octave_idx_type _len, |
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159 octave_idx_type _step, direct) |
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160 : idx_base_rep (), start(_start), len(_len), step(_step) { } |
4938 | 161 |
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162 idx_range_rep (void) |
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163 : start(0), len(0), step(1) { } |
1560 | 164 |
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165 // Zero-based constructor. |
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166 idx_range_rep (octave_idx_type _start, octave_idx_type _limit, |
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167 octave_idx_type _step); |
1560 | 168 |
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169 idx_range_rep (const Range&); |
1560 | 170 |
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171 octave_idx_type xelem (octave_idx_type i) const |
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172 { return start + i * step; } |
1560 | 173 |
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174 octave_idx_type checkelem (octave_idx_type i) const; |
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175 |
10487 | 176 octave_idx_type length (octave_idx_type) const { return len; } |
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178 octave_idx_type extent (octave_idx_type n) const |
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179 { return len ? std::max (n, (start + 1 + (step < 0 ? 0 : step * (len - 1)))) : n; } |
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8333 | 181 idx_class_type idx_class (void) const { return class_range; } |
1879 | 182 |
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183 idx_base_rep *sort_uniq_clone (bool uniq = false); |
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185 idx_base_rep *sort_idx (Array<octave_idx_type>&); |
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186 |
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187 bool is_colon_equiv (octave_idx_type n) const |
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188 { return start == 0 && step == 1 && len == n; } |
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8333 | 190 dim_vector orig_dimensions (void) const |
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191 { return dim_vector (1, len); } |
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8333 | 193 octave_idx_type get_start (void) const { return start; } |
1560 | 194 |
8333 | 195 octave_idx_type get_step (void) const { return step; } |
1560 | 196 |
3504 | 197 std::ostream& print (std::ostream& os) const; |
1560 | 198 |
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199 Range unconvert (void) const; |
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200 |
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201 Array<octave_idx_type> as_array (void); |
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202 |
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203 private: |
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204 |
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205 DECLARE_OCTAVE_ALLOCATOR |
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206 |
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207 // No copying! |
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208 idx_range_rep (const idx_range_rep& idx); |
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209 |
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210 octave_idx_type start, len, step; |
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211 |
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212 }; |
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213 |
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214 // The integer scalar index. |
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215 class OCTAVE_API idx_scalar_rep : public idx_base_rep |
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216 { |
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217 public: |
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218 idx_scalar_rep (octave_idx_type i, direct) |
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219 : data (i) { } |
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220 |
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221 idx_scalar_rep (void) |
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222 : data (0) { } |
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223 |
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224 // Zero-based constructor. |
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225 idx_scalar_rep (octave_idx_type i); |
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226 |
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227 template <class T> |
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228 idx_scalar_rep (T x); |
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229 |
10487 | 230 octave_idx_type xelem (octave_idx_type) const { return data; } |
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231 |
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232 octave_idx_type checkelem (octave_idx_type i) const; |
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233 |
10487 | 234 octave_idx_type length (octave_idx_type) const { return 1; } |
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235 |
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236 octave_idx_type extent (octave_idx_type n) const |
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237 { return std::max (n, data + 1); } |
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238 |
8333 | 239 idx_class_type idx_class (void) const { return class_scalar; } |
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240 |
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241 idx_base_rep *sort_uniq_clone (bool = false) |
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242 { count++; return this; } |
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243 |
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244 idx_base_rep *sort_idx (Array<octave_idx_type>&); |
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245 |
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246 bool is_colon_equiv (octave_idx_type n) const |
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247 { return n == 1 && data == 0; } |
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248 |
10487 | 249 dim_vector orig_dimensions (void) const { return dim_vector (1, 1); } |
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250 |
8333 | 251 octave_idx_type get_data (void) const { return data; } |
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252 |
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253 std::ostream& print (std::ostream& os) const; |
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254 |
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255 double unconvert (void) const; |
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256 |
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257 Array<octave_idx_type> as_array (void); |
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258 |
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259 private: |
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260 |
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261 DECLARE_OCTAVE_ALLOCATOR |
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262 |
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263 // No copying! |
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264 idx_scalar_rep (const idx_scalar_rep& idx); |
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265 |
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266 octave_idx_type data; |
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267 |
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268 }; |
4504 | 269 |
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270 // The integer vector index. |
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271 class OCTAVE_API idx_vector_rep : public idx_base_rep |
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272 { |
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273 public: |
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274 // Direct constructor. |
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275 idx_vector_rep (octave_idx_type *_data, octave_idx_type _len, |
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276 octave_idx_type _ext, const dim_vector& od, direct) |
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277 : data (_data), len (_len), ext (_ext), aowner (0), orig_dims (od) { } |
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278 |
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279 idx_vector_rep (void) |
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280 : data (0), len (0), aowner (0) |
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281 { } |
5275 | 282 |
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283 // Zero-based constructor. |
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284 idx_vector_rep (const Array<octave_idx_type>& inda); |
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285 |
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286 idx_vector_rep (const Array<octave_idx_type>& inda, |
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287 octave_idx_type _ext, direct); |
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288 |
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289 template <class T> |
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290 idx_vector_rep (const Array<T>&); |
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291 |
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292 idx_vector_rep (bool); |
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293 |
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294 idx_vector_rep (const Array<bool>&, octave_idx_type = -1); |
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295 |
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296 idx_vector_rep (const Sparse<bool>&); |
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297 |
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298 ~idx_vector_rep (void); |
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299 |
10487 | 300 octave_idx_type xelem (octave_idx_type i) const { return data[i]; } |
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301 |
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302 octave_idx_type checkelem (octave_idx_type i) const; |
4653 | 303 |
10487 | 304 octave_idx_type length (octave_idx_type) const { return len; } |
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305 |
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306 octave_idx_type extent (octave_idx_type n) const |
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307 { return std::max (n, ext); } |
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308 |
8333 | 309 idx_class_type idx_class (void) const { return class_vector; } |
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310 |
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311 idx_base_rep *sort_uniq_clone (bool uniq = false); |
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312 |
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313 idx_base_rep *sort_idx (Array<octave_idx_type>&); |
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314 |
10487 | 315 dim_vector orig_dimensions (void) const { return orig_dims; } |
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316 |
8333 | 317 const octave_idx_type *get_data (void) const { return data; } |
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318 |
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319 std::ostream& print (std::ostream& os) const; |
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320 |
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321 Array<double> unconvert (void) const; |
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322 |
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323 Array<octave_idx_type> as_array (void); |
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324 |
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325 private: |
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326 |
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327 DECLARE_OCTAVE_ALLOCATOR |
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328 |
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329 // No copying! |
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330 idx_vector_rep (const idx_vector_rep& idx); |
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331 |
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332 const octave_idx_type *data; |
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333 octave_idx_type len, ext; |
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334 |
10487 | 335 // This is a trick to allow user-given zero-based arrays to be used |
336 // as indices without copying. If the following pointer is nonzero, | |
337 // we do not own the data, but rather have an Array<octave_idx_type> | |
338 // object that provides us the data. Note that we need a pointer | |
339 // because we deferred the Array<T> declaration and we do not want | |
340 // it yet to be defined. | |
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341 |
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342 Array<octave_idx_type> *aowner; |
1560 | 343 |
4653 | 344 dim_vector orig_dims; |
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345 }; |
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346 |
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347 // The logical mask index. |
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348 class OCTAVE_API idx_mask_rep : public idx_base_rep |
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349 { |
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350 public: |
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351 // Direct constructor. |
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352 idx_mask_rep (bool *_data, octave_idx_type _len, |
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353 octave_idx_type _ext, const dim_vector& od, direct) |
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354 : data (_data), len (_len), ext (_ext), aowner (0), orig_dims (od) { } |
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355 |
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356 idx_mask_rep (void) |
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357 : data (0), len (0), aowner (0) |
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358 { } |
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359 |
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360 idx_mask_rep (bool); |
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361 |
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362 idx_mask_rep (const Array<bool>&, octave_idx_type = -1); |
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363 |
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364 ~idx_mask_rep (void); |
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365 |
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366 octave_idx_type xelem (octave_idx_type i) const; |
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367 |
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368 octave_idx_type checkelem (octave_idx_type i) const; |
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369 |
10487 | 370 octave_idx_type length (octave_idx_type) const { return len; } |
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371 |
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372 octave_idx_type extent (octave_idx_type n) const |
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373 { return std::max (n, ext); } |
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374 |
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375 idx_class_type idx_class (void) const { return class_mask; } |
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376 |
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377 idx_base_rep *sort_uniq_clone (bool = false) |
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378 { count++; return this; } |
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379 |
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380 idx_base_rep *sort_idx (Array<octave_idx_type>&); |
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381 |
10487 | 382 dim_vector orig_dimensions (void) const { return orig_dims; } |
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383 |
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384 bool is_colon_equiv (octave_idx_type n) const |
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385 { return len == n && ext == n; } |
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386 |
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387 const bool *get_data (void) const { return data; } |
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388 |
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389 std::ostream& print (std::ostream& os) const; |
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390 |
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391 Array<bool> unconvert (void) const; |
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392 |
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393 Array<octave_idx_type> as_array (void); |
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394 |
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395 private: |
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396 |
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397 DECLARE_OCTAVE_ALLOCATOR |
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398 |
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399 // No copying! |
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400 idx_mask_rep (const idx_mask_rep& idx); |
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401 |
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402 const bool *data; |
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403 octave_idx_type len, ext; |
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404 |
10487 | 405 // FIXME: I'm not sure if this is a good design. Maybe it would be |
406 // better to employ some sort of generalized iteration scheme. | |
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407 mutable octave_idx_type lsti, lste; |
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408 |
10487 | 409 // This is a trick to allow user-given mask arrays to be used as |
410 // indices without copying. If the following pointer is nonzero, we | |
411 // do not own the data, but rather have an Array<bool> object that | |
412 // provides us the data. Note that we need a pointer because we | |
413 // deferred the Array<T> declaration and we do not want it yet to be | |
414 // defined. | |
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415 |
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416 Array<bool> *aowner; |
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417 |
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418 dim_vector orig_dims; |
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419 }; |
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420 |
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421 idx_vector (idx_base_rep *r) : rep (r) { } |
1560 | 422 |
10487 | 423 // The shared empty vector representation (for fast default |
424 // constructor). | |
8333 | 425 static idx_vector_rep *nil_rep (void) |
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426 { |
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427 static idx_vector_rep ivr; |
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428 return &ivr; |
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429 } |
4938 | 430 |
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431 // The shared empty vector representation with the error flag set. |
8333 | 432 static idx_vector_rep *err_rep (void) |
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433 { |
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434 static idx_vector_rep ivr; |
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435 ivr.err = true; |
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436 return &ivr; |
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437 } |
4938 | 438 |
10487 | 439 // If there was an error in constructing the rep, replace it with |
440 // empty vector for safety. | |
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441 void chkerr (void) |
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442 { |
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443 if (rep->err) |
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444 { |
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445 if (--rep->count == 0) |
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446 delete rep; |
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447 rep = err_rep (); |
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448 rep->count++; |
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449 } |
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450 } |
1560 | 451 |
1 | 452 public: |
1551 | 453 |
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454 // Fast empty constructor. |
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455 idx_vector (void) : rep (nil_rep ()) { rep->count++; } |
1560 | 456 |
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457 // Zero-based constructors (for use from C++). |
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458 idx_vector (octave_idx_type i) : rep (new idx_scalar_rep (i)) |
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459 { chkerr (); } |
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460 |
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461 idx_vector (octave_idx_type start, octave_idx_type limit, |
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462 octave_idx_type step = 1) |
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463 : rep (new idx_range_rep (start, limit, step)) |
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464 { chkerr (); } |
1560 | 465 |
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466 static idx_vector |
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467 make_range (octave_idx_type start, octave_idx_type step, |
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468 octave_idx_type len) |
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469 { |
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470 return idx_vector (new idx_range_rep (start, len, step, DIRECT)); |
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471 } |
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472 |
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473 idx_vector (const Array<octave_idx_type>& inda) |
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474 : rep (new idx_vector_rep (inda)) |
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475 { chkerr (); } |
1560 | 476 |
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477 // Directly pass extent, no checking. |
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478 idx_vector (const Array<octave_idx_type>& inda, octave_idx_type ext) |
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479 : rep (new idx_vector_rep (inda, ext, DIRECT)) |
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480 { } |
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481 |
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482 // Colon is best constructed by simply copying (or referencing) this member. |
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483 static const idx_vector colon; |
4938 | 484 |
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485 // or passing ':' here |
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486 idx_vector (char c) : rep (new idx_colon_rep (c)) { chkerr (); } |
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487 |
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488 // Conversion constructors (used by interpreter). |
1560 | 489 |
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490 template <class T> |
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491 idx_vector (octave_int<T> x) : rep (new idx_scalar_rep (x)) { chkerr (); } |
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492 |
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493 idx_vector (double x) : rep (new idx_scalar_rep (x)) { chkerr (); } |
2386 | 494 |
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495 idx_vector (float x) : rep (new idx_scalar_rep (x)) { chkerr (); } |
3928 | 496 |
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497 // A scalar bool does not necessarily map to scalar index. |
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498 idx_vector (bool x) : rep (new idx_mask_rep (x)) { chkerr (); } |
1560 | 499 |
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500 template <class T> |
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501 idx_vector (const Array<octave_int<T> >& nda) : rep (new idx_vector_rep (nda)) |
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502 { chkerr (); } |
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503 |
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504 idx_vector (const Array<double>& nda) : rep (new idx_vector_rep (nda)) |
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505 { chkerr (); } |
2828 | 506 |
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507 idx_vector (const Array<float>& nda) : rep (new idx_vector_rep (nda)) |
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508 { chkerr (); } |
4938 | 509 |
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510 idx_vector (const Array<bool>& nda); |
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511 |
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512 idx_vector (const Range& r) |
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513 : rep (new idx_range_rep (r)) |
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514 { chkerr (); } |
2828 | 515 |
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516 idx_vector (const Sparse<bool>& nda) : rep (new idx_vector_rep (nda)) |
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517 { chkerr (); } |
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518 |
4979 | 519 idx_vector (const idx_vector& a) : rep (a.rep) { rep->count++; } |
1551 | 520 |
2802 | 521 ~idx_vector (void) |
1560 | 522 { |
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523 if (--rep->count == 0) |
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524 delete rep; |
1560 | 525 } |
1 | 526 |
1560 | 527 idx_vector& operator = (const idx_vector& a) |
528 { | |
529 if (this != &a) | |
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530 { |
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531 if (--rep->count == 0) |
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532 delete rep; |
1 | 533 |
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534 rep = a.rep; |
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535 rep->count++; |
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536 } |
1560 | 537 return *this; |
1551 | 538 } |
539 | |
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540 idx_class_type idx_class (void) const { return rep->idx_class (); } |
1560 | 541 |
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542 octave_idx_type length (octave_idx_type n = 0) const |
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543 { return rep->length (n); } |
191 | 544 |
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545 octave_idx_type extent (octave_idx_type n) const |
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546 { return rep->extent (n); } |
1 | 547 |
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548 octave_idx_type xelem (octave_idx_type n) const |
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549 { return rep->xelem (n); } |
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550 |
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551 octave_idx_type checkelem (octave_idx_type n) const |
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552 { return rep->checkelem (n); } |
1551 | 553 |
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554 octave_idx_type operator () (octave_idx_type n) const |
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555 { |
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556 #if defined (BOUNDS_CHECKING) |
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557 return rep->checkelem (n); |
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558 #else |
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559 return rep->xelem (n); |
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560 #endif |
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561 } |
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562 |
8333 | 563 operator bool (void) const |
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564 { return ! rep->err; } |
1 | 565 |
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566 bool is_colon (void) const |
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567 { return rep->idx_class () == class_colon; } |
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568 |
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569 bool is_scalar (void) const |
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570 { return rep->idx_class () == class_scalar; } |
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572 bool is_range (void) const |
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573 { return rep->idx_class () == class_range; } |
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574 |
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575 bool is_colon_equiv (octave_idx_type n) const |
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576 { return rep->is_colon_equiv (n); } |
3079 | 577 |
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578 idx_vector sorted (bool uniq = false) const |
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579 { return idx_vector (rep->sort_uniq_clone (uniq)); } |
208 | 580 |
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581 idx_vector sorted (Array<octave_idx_type>& sidx) const |
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582 { return idx_vector (rep->sort_idx (sidx)); } |
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583 |
4653 | 584 dim_vector orig_dimensions (void) const { return rep->orig_dimensions (); } |
4504 | 585 |
8333 | 586 octave_idx_type orig_rows (void) const |
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587 { return orig_dimensions () (0); } |
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588 |
8333 | 589 octave_idx_type orig_columns (void) const |
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590 { return orig_dimensions () (1); } |
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591 |
2663 | 592 int orig_empty (void) const |
4653 | 593 { return (! is_colon () && orig_dimensions().any_zero ()); } |
2663 | 594 |
4653 | 595 // i/o |
1 | 596 |
3504 | 597 std::ostream& print (std::ostream& os) const { return rep->print (os); } |
1560 | 598 |
3504 | 599 friend std::ostream& operator << (std::ostream& os, const idx_vector& a) |
1560 | 600 { return a.print (os); } |
601 | |
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602 // Slice with specializations. No checking of bounds! |
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603 // |
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604 // This is equivalent to the following loop (but much faster): |
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605 // |
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606 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
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607 // dest[i] = src[idx(i)]; |
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608 // return i; |
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609 // |
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610 template <class T> |
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611 octave_idx_type |
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612 index (const T *src, octave_idx_type n, T *dest) const |
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613 { |
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614 octave_idx_type len = rep->length (n); |
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616 switch (rep->idx_class ()) |
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617 { |
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618 case class_colon: |
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619 copy_or_memcpy (len, src, dest); |
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620 break; |
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622 case class_range: |
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623 { |
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624 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep); |
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625 octave_idx_type start = r->get_start (), step = r->get_step (); |
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626 const T *ssrc = src + start; |
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627 if (step == 1) |
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628 copy_or_memcpy (len, ssrc, dest); |
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629 else if (step == -1) |
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630 std::reverse_copy (ssrc - len + 1, ssrc + 1, dest); |
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631 else if (step == 0) |
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632 std::fill_n (dest, len, *ssrc); |
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633 else |
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634 { |
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635 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step) |
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636 dest[i] = ssrc[j]; |
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637 } |
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638 } |
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639 break; |
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641 case class_scalar: |
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642 { |
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643 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep); |
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644 dest[0] = src[r->get_data ()]; |
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|
645 } |
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|
646 break; |
10487 | 647 |
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648 case class_vector: |
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|
649 { |
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650 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep); |
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651 const octave_idx_type *data = r->get_data (); |
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652 for (octave_idx_type i = 0; i < len; i++) |
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653 dest[i] = src[data[i]]; |
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|
654 } |
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improve dense array indexing
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|
655 break; |
10487 | 656 |
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|
657 case class_mask: |
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|
658 { |
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659 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep); |
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660 const bool *data = r->get_data (); |
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661 octave_idx_type ext = r->extent (0); |
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662 for (octave_idx_type i = 0; i < ext; i++) |
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663 if (data[i]) *dest++ = src[i]; |
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|
664 } |
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diff
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|
665 break; |
10487 | 666 |
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|
667 default: |
7cbe01c21986
improve dense array indexing
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diff
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|
668 assert (false); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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7573
diff
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|
669 break; |
7cbe01c21986
improve dense array indexing
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diff
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|
670 } |
7cbe01c21986
improve dense array indexing
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|
671 |
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|
672 return len; |
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diff
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|
673 } |
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improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
674 |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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|
675 // Slice assignment with specializations. No checking of bounds! |
7cbe01c21986
improve dense array indexing
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|
676 // |
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improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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677 // This is equivalent to the following loop (but much faster): |
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improve dense array indexing
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|
678 // |
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improve dense array indexing
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679 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
7cbe01c21986
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680 // dest[idx(i)] = src[i]; |
7cbe01c21986
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681 // return i; |
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Jaroslav Hajek <highegg@gmail.com>
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diff
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|
682 // |
7cbe01c21986
improve dense array indexing
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|
683 template <class T> |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
684 octave_idx_type |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
685 assign (const T *src, octave_idx_type n, T *dest) const |
7cbe01c21986
improve dense array indexing
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diff
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|
686 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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|
687 octave_idx_type len = rep->length (n); |
10487 | 688 |
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|
689 switch (rep->idx_class ()) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
690 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
691 case class_colon: |
9780
6dafc60dde31
rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
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|
692 copy_or_memcpy (len, src, dest); |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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|
693 break; |
10487 | 694 |
8290
7cbe01c21986
improve dense array indexing
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parents:
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diff
changeset
|
695 case class_range: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
696 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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|
697 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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698 octave_idx_type start = r->get_start (), step = r->get_step (); |
7cbe01c21986
improve dense array indexing
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|
699 T *sdest = dest + start; |
7cbe01c21986
improve dense array indexing
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|
700 if (step == 1) |
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701 copy_or_memcpy (len, src, sdest); |
8290
7cbe01c21986
improve dense array indexing
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|
702 else if (step == -1) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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703 std::reverse_copy (src, src + len, sdest - len + 1); |
7cbe01c21986
improve dense array indexing
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parents:
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diff
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|
704 else |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
705 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
706 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step) |
7cbe01c21986
improve dense array indexing
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|
707 sdest[j] = src[i]; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
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|
708 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
709 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
710 break; |
10487 | 711 |
8290
7cbe01c21986
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diff
changeset
|
712 case class_scalar: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
713 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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changeset
|
714 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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715 dest[r->get_data ()] = src[0]; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
716 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
717 break; |
10487 | 718 |
8290
7cbe01c21986
improve dense array indexing
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diff
changeset
|
719 case class_vector: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
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|
720 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
721 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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|
722 const octave_idx_type *data = r->get_data (); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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changeset
|
723 for (octave_idx_type i = 0; i < len; i++) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
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|
724 dest[data[i]] = src[i]; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
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|
725 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
726 break; |
10487 | 727 |
9879
034677ab6865
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parents:
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diff
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|
728 case class_mask: |
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Jaroslav Hajek <highegg@gmail.com>
parents:
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|
729 { |
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Jaroslav Hajek <highegg@gmail.com>
parents:
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|
730 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep); |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
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|
731 const bool *data = r->get_data (); |
034677ab6865
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|
732 octave_idx_type ext = r->extent (0); |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
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changeset
|
733 for (octave_idx_type i = 0; i < ext; i++) |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
734 if (data[i]) dest[i] = *src++; |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
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|
735 } |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
736 break; |
10487 | 737 |
8290
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
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|
738 default: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
739 assert (false); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
740 break; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
741 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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|
742 |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
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|
743 return len; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
744 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
745 |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
746 // Slice fill with specializations. No checking of bounds! |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
747 // |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
748 // This is equivalent to the following loop (but much faster): |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
749 // |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
750 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
751 // dest[idx(i)] = val; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
752 // return i; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
753 // |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
754 template <class T> |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
755 octave_idx_type |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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|
756 fill (const T& val, octave_idx_type n, T *dest) const |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
757 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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changeset
|
758 octave_idx_type len = rep->length (n); |
10487 | 759 |
8290
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parents:
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diff
changeset
|
760 switch (rep->idx_class ()) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
761 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
changeset
|
762 case class_colon: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
763 std::fill (dest, dest + len, val); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
764 break; |
10487 | 765 |
8290
7cbe01c21986
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parents:
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diff
changeset
|
766 case class_range: |
7cbe01c21986
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Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
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|
767 { |
7cbe01c21986
improve dense array indexing
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parents:
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diff
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|
768 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
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|
769 octave_idx_type start = r->get_start (), step = r->get_step (); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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changeset
|
770 T *sdest = dest + start; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
771 if (step == 1) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
772 std::fill (sdest, sdest + len, val); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
changeset
|
773 else if (step == -1) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
774 std::fill (sdest - len + 1, sdest + 1, val); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
775 else |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
776 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
777 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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changeset
|
778 sdest[j] = val; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
779 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
780 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
781 break; |
10487 | 782 |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
783 case class_scalar: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
784 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
785 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
786 dest[r->get_data ()] = val; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
787 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
788 break; |
10487 | 789 |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
790 case class_vector: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
791 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
792 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
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|
793 const octave_idx_type *data = r->get_data (); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
794 for (octave_idx_type i = 0; i < len; i++) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
795 dest[data[i]] = val; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
796 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
797 break; |
10487 | 798 |
9879
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
799 case class_mask: |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
800 { |
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parents:
9780
diff
changeset
|
801 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep); |
034677ab6865
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parents:
9780
diff
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|
802 const bool *data = r->get_data (); |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
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|
803 octave_idx_type ext = r->extent (0); |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
804 for (octave_idx_type i = 0; i < ext; i++) |
034677ab6865
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parents:
9780
diff
changeset
|
805 if (data[i]) dest[i] = val; |
034677ab6865
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parents:
9780
diff
changeset
|
806 } |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
807 break; |
10487 | 808 |
8290
7cbe01c21986
improve dense array indexing
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parents:
7573
diff
changeset
|
809 default: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
810 assert (false); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
811 break; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
812 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
813 |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff
changeset
|
814 return len; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
815 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
816 |
10487 | 817 // Generic non-breakable indexed loop. The loop body should be |
818 // encapsulated in a single functor body. This is equivalent to the | |
819 // following loop (but faster, at least for simple inlined bodies): | |
8934
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parents:
8920
diff
changeset
|
820 // |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
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diff
changeset
|
821 // for (octave_idx_type i = 0; i < idx->length (n); i++) body (idx(i)); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
822 |
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
823 template <class Functor> |
c2099a4d12ea
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
824 void |
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partially optimize accumarray
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parents:
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diff
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|
825 loop (octave_idx_type n, Functor body) const |
c2099a4d12ea
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
826 { |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
827 octave_idx_type len = rep->length (n); |
10487 | 828 |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
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|
829 switch (rep->idx_class ()) |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
830 { |
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partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
831 case class_colon: |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
832 for (octave_idx_type i = 0; i < len; i++) body (i); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
833 break; |
10487 | 834 |
8934
c2099a4d12ea
partially optimize accumarray
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parents:
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diff
changeset
|
835 case class_range: |
c2099a4d12ea
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Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
836 { |
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parents:
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diff
changeset
|
837 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
838 octave_idx_type start = r->get_start (), step = r->get_step (); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
839 octave_idx_type i, j; |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
840 if (step == 1) |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
841 for (i = start, j = start + len; i < j; i++) body (i); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
842 else if (step == -1) |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
843 for (i = start, j = start - len; i > j; i--) body (i); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
844 else |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
845 for (i = 0, j = start; i < len; i++, j += step) body (j); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
846 } |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
847 break; |
10487 | 848 |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
849 case class_scalar: |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
850 { |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
851 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
852 body (r->get_data ()); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
853 } |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
854 break; |
10487 | 855 |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
856 case class_vector: |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
857 { |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
858 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
859 const octave_idx_type *data = r->get_data (); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
860 for (octave_idx_type i = 0; i < len; i++) body (data[i]); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
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diff
changeset
|
861 } |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
862 break; |
10487 | 863 |
9879
034677ab6865
smarter treatment of mask indexing
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parents:
9780
diff
changeset
|
864 case class_mask: |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
865 { |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
866 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep); |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
867 const bool *data = r->get_data (); |
034677ab6865
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Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
868 octave_idx_type ext = r->extent (0); |
9985
43a29eeda994
fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents:
9894
diff
changeset
|
869 for (octave_idx_type i = 0; i < ext; i++) |
43a29eeda994
fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents:
9894
diff
changeset
|
870 if (data[i]) body (i); |
9879
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
871 } |
034677ab6865
smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
9780
diff
changeset
|
872 break; |
10487 | 873 |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
874 default: |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
875 assert (false); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
876 break; |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
877 } |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
878 |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
879 } |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
880 |
10487 | 881 // Generic breakable indexed loop. The loop body should be |
882 // encapsulated in a single functor body. This is equivalent to the | |
883 // following loop (but faster, at least for simple inlined bodies): | |
8290
7cbe01c21986
improve dense array indexing
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parents:
7573
diff
changeset
|
884 // |
7cbe01c21986
improve dense array indexing
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parents:
7573
diff
changeset
|
885 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
8934
c2099a4d12ea
partially optimize accumarray
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parents:
8920
diff
changeset
|
886 // if (body (idx(i))) break; |
8290
7cbe01c21986
improve dense array indexing
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diff
changeset
|
887 // return i; |
7cbe01c21986
improve dense array indexing
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diff
changeset
|
888 // |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
889 |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
890 template <class Functor> |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
891 octave_idx_type |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
892 bloop (octave_idx_type n, Functor body) const |
8290
7cbe01c21986
improve dense array indexing
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diff
changeset
|
893 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
894 octave_idx_type len = rep->length (n), ret; |
10487 | 895 |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
896 switch (rep->idx_class ()) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
897 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
898 case class_colon: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
899 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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7573
diff
changeset
|
900 octave_idx_type i; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
901 for (i = 0; i < len && body (i); i++) ; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
902 ret = i; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
903 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
904 break; |
10487 | 905 |
8290
7cbe01c21986
improve dense array indexing
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parents:
7573
diff
changeset
|
906 case class_range: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
907 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
908 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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7573
diff
changeset
|
909 octave_idx_type start = r->get_start (), step = r->get_step (); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
910 octave_idx_type i, j; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
911 if (step == 1) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
912 for (i = start, j = start + len; i < j && body (i); i++) ; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
913 else if (step == -1) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
914 for (i = start, j = start - len; i > j && body (i); i--) ; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
915 else |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
916 for (i = 0, j = start; i < len && body (j); i++, j += step) ; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
917 ret = i; |
7cbe01c21986
improve dense array indexing
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7573
diff
changeset
|
918 } |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
919 break; |
10487 | 920 |
8290
7cbe01c21986
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parents:
7573
diff
changeset
|
921 case class_scalar: |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
922 { |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
923 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep); |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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7573
diff
changeset
|
924 ret = body (r->get_data ()) ? 1 : 0; |
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925 } |
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926 break; |
10487 | 927 |
8290
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928 case class_vector: |
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929 { |
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930 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep); |
8934
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931 const octave_idx_type *data = r->get_data (); |
8290
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932 octave_idx_type i; |
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933 for (i = 0; i < len && body (data[i]); i++) ; |
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934 ret = i; |
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935 } |
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936 break; |
10487 | 937 |
9879
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938 case class_mask: |
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939 { |
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940 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep); |
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941 const bool *data = r->get_data (); |
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942 octave_idx_type ext = r->extent (0), j = 0; |
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943 for (octave_idx_type i = 0; i < ext; i++) |
9985
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944 { |
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945 if (data[i]) |
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946 { |
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947 if (body (i)) |
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948 break; |
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949 else |
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950 j++; |
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951 } |
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952 } |
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953 |
9879
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954 ret = j; |
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955 } |
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956 break; |
10487 | 957 |
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958 default: |
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959 assert (false); |
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960 break; |
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961 } |
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962 |
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963 return ret; |
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964 } |
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965 |
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966 // Rationale: |
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967 // This method is the key to "smart indexing". When indexing cartesian |
10487 | 968 // arrays, sometimes consecutive index vectors can be reduced into a |
969 // single index. If rows (A) = k and i.maybe_reduce (j) gives k, then | |
970 // A(i,j)(:) is equal to A(k)(:). | |
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971 |
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972 // If the next index can be reduced, returns true and updates this. |
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973 bool maybe_reduce (octave_idx_type n, const idx_vector& j, |
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974 octave_idx_type nj); |
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975 |
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976 bool is_cont_range (octave_idx_type n, |
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977 octave_idx_type& l, octave_idx_type& u) const; |
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978 |
9725 | 979 // Returns the increment for ranges and colon, 0 for scalars and empty |
980 // vectors, 1st difference otherwise. | |
981 octave_idx_type increment (void) const; | |
982 | |
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983 idx_vector |
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984 complement (octave_idx_type n) const; |
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985 |
8367
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986 bool is_permutation (octave_idx_type n) const; |
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987 |
10512
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988 // Returns the inverse permutation. If this is not a permutation on 1:n, the |
aac9f4265048
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989 // result is undefined (but no error unless extent () != n). |
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990 idx_vector inverse_permutation (octave_idx_type n) const; |
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991 |
9479
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992 // Copies all the indices to a given array. Not allowed for colons. |
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993 void copy_data (octave_idx_type *data) const; |
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994 |
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995 // If the index is a mask, convert it to index vector. |
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996 idx_vector unmask (void) const; |
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997 |
9894
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998 // Unconverts the index to a scalar, Range, double array or a mask. |
9479
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999 void unconvert (idx_class_type& iclass, |
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1000 double& scalar, Range& range, |
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1001 Array<double>& array, Array<bool>& mask) const; |
10339
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1002 |
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1003 Array<octave_idx_type> as_array (void) const; |
10475
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1004 |
10487 | 1005 // Raw pointer to index array. This is non-const because it may be |
1006 // necessary to mutate the index. | |
10475
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1007 const octave_idx_type *raw (void); |
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1008 |
8333 | 1009 // FIXME -- these are here for compatibility. They should be removed |
1010 // when no longer in use. | |
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1011 |
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1012 octave_idx_type elem (octave_idx_type n) const |
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1013 { return (*this) (n); } |
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1014 |
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1015 bool is_colon_equiv (octave_idx_type n, int) const |
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1016 { return is_colon_equiv (n); } |
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1017 |
8333 | 1018 octave_idx_type |
1019 freeze (octave_idx_type z_len, const char *tag, bool resize_ok = false); | |
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1020 |
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1021 void sort (bool uniq = false) |
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1022 { *this = sorted (uniq); } |
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1023 |
8333 | 1024 octave_idx_type ones_count (void) const; |
8290
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1025 |
8333 | 1026 octave_idx_type max (void) const { return extent (1) - 1; } |
8290
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1027 |
1 | 1028 private: |
1029 | |
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1030 idx_base_rep *rep; |
1 | 1031 |
1032 }; | |
1033 | |
1034 #endif |