Mercurial > octave
annotate liboctave/array/idx-vector.h @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
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1 | 1 /* |
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update Octave Project Developers copyright for the new year
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3 Copyright (C) 1993-2020 The Octave Project Developers |
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4 |
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5 See the file COPYRIGHT.md in the top-level directory of this distribution |
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6 or <https://octave.org/COPYRIGHT.html/>. |
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7 |
1 | 8 |
9 This file is part of Octave. | |
10 | |
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11 Octave is free software: you can redistribute it and/or modify it |
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12 under the terms of the GNU General Public License as published by |
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13 the Free Software Foundation, either version 3 of the License, or |
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14 (at your option) any later version. |
1 | 15 |
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16 Octave is distributed in the hope that it will be useful, but |
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17 WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 GNU General Public License for more details. |
1 | 20 |
21 You should have received a copy of the GNU General Public License | |
7016 | 22 along with Octave; see the file COPYING. If not, see |
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23 <https://www.gnu.org/licenses/>. |
1 | 24 |
25 */ | |
26 | |
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27 #if ! defined (octave_idx_vector_h) |
383 | 28 #define octave_idx_vector_h 1 |
1 | 29 |
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30 #include "octave-config.h" |
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31 |
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32 #include <cassert> |
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33 #include <cstring> |
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34 |
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35 #include <algorithm> |
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36 #include <iosfwd> |
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37 #include <memory> |
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4653 | 39 #include "dim-vector.h" |
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40 #include "oct-inttypes-fwd.h" |
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41 #include "oct-refcount.h" |
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42 |
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43 template <typename T> class Array; |
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44 template <typename T> class Sparse; |
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45 class Range; |
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47 // Design rationale: |
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48 // idx_vector is a reference-counting, polymorphic pointer, that can contain |
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49 // 4 types of index objects: a magic colon, a range, a scalar, or an index vector. |
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50 // Polymorphic methods for single element access are provided, as well as |
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51 // templates implementing "early dispatch", i.e., hoisting the checks for index |
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52 // type out of loops. |
164 | 53 |
453 | 54 class |
6108 | 55 OCTAVE_API |
453 | 56 idx_vector |
1 | 57 { |
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58 public: |
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59 |
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60 enum idx_class_type |
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61 { |
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62 class_invalid = -1, |
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63 class_colon = 0, |
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64 class_range, |
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65 class_scalar, |
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66 class_vector, |
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67 class_mask |
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68 }; |
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69 |
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70 template <typename T, typename D> friend class std::unique_ptr; |
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71 |
1560 | 72 private: |
73 | |
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74 class OCTAVE_API idx_base_rep |
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75 { |
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76 public: |
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77 |
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78 idx_base_rep (void) : count (1), err (false) { } |
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79 |
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80 // No copying! |
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81 |
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82 idx_base_rep (const idx_base_rep&) = delete; |
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83 |
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84 idx_base_rep& operator = (const idx_base_rep&) = delete; |
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85 |
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86 virtual ~idx_base_rep (void) = default; |
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87 |
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88 // Non-range-checking element query. |
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89 virtual octave_idx_type xelem (octave_idx_type i) const = 0; |
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90 |
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91 // Range-checking element query. |
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92 virtual octave_idx_type checkelem (octave_idx_type i) const = 0; |
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93 |
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94 // Length of the index vector. |
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95 virtual octave_idx_type length (octave_idx_type n) const = 0; |
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96 |
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97 // The maximum index + 1. The actual dimension is passed in. |
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98 virtual octave_idx_type extent (octave_idx_type n) const = 0; |
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99 |
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100 // Index class. |
8333 | 101 virtual idx_class_type idx_class (void) const { return class_invalid; } |
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102 |
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103 // Sorts, maybe uniqifies, and returns a clone object pointer. |
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104 virtual idx_base_rep * sort_uniq_clone (bool uniq = false) = 0; |
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105 // Sorts, and returns a sorting permutation (aka Array::sort). |
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106 virtual idx_base_rep * sort_idx (Array<octave_idx_type>&) = 0; |
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107 |
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108 // Checks whether the index is colon or a range equivalent to colon. |
10487 | 109 virtual bool is_colon_equiv (octave_idx_type) const { return false; } |
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110 |
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111 // The original dimensions of object (used when subscribing by matrices). |
10487 | 112 virtual dim_vector orig_dimensions (void) const { return dim_vector (); } |
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113 |
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114 // i/o |
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115 virtual std::ostream& print (std::ostream& os) const = 0; |
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116 |
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117 virtual Array<octave_idx_type> as_array (void); |
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118 |
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119 octave::refcount<octave_idx_type> count; |
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120 |
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121 bool err; |
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122 }; |
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123 |
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124 // The magic colon index. |
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125 class OCTAVE_API idx_colon_rep : public idx_base_rep |
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127 public: | |
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128 |
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129 idx_colon_rep (void) = default; |
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131 idx_colon_rep (char c); |
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132 |
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133 // No copying! |
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134 |
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135 idx_colon_rep (const idx_colon_rep& idx) = delete; |
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136 |
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137 idx_colon_rep& operator = (const idx_colon_rep& idx) = delete; |
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138 |
10487 | 139 octave_idx_type xelem (octave_idx_type i) const { return i; } |
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140 |
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141 octave_idx_type checkelem (octave_idx_type i) const; |
1560 | 142 |
10487 | 143 octave_idx_type length (octave_idx_type n) const { return n; } |
1560 | 144 |
10487 | 145 octave_idx_type extent (octave_idx_type n) const { return n; } |
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146 |
8333 | 147 idx_class_type idx_class (void) const { return class_colon; } |
1879 | 148 |
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149 idx_base_rep * sort_uniq_clone (bool = false) |
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150 { count++; return this; } |
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152 OCTAVE_NORETURN idx_base_rep * sort_idx (Array<octave_idx_type>&); |
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153 |
10487 | 154 bool is_colon_equiv (octave_idx_type) const { return true; } |
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155 |
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156 std::ostream& print (std::ostream& os) const; |
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157 }; |
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159 // To distinguish the "direct" constructors that blindly trust the data. |
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160 enum direct { DIRECT }; |
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162 // The integer range index. |
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163 class OCTAVE_API idx_range_rep : public idx_base_rep |
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164 { |
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165 public: |
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166 |
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167 idx_range_rep (void) = delete; |
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168 |
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169 idx_range_rep (octave_idx_type _start, octave_idx_type _len, |
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170 octave_idx_type _step, direct) |
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171 : idx_base_rep (), start(_start), len(_len), step(_step) { } |
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173 // Zero-based constructor. |
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174 idx_range_rep (octave_idx_type _start, octave_idx_type _limit, |
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175 octave_idx_type _step); |
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176 |
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177 idx_range_rep (const Range&); |
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178 |
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179 // No copying! |
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180 |
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181 idx_range_rep (const idx_range_rep& idx) = delete; |
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182 |
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183 idx_range_rep& operator = (const idx_range_rep& idx) = delete; |
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185 octave_idx_type xelem (octave_idx_type i) const |
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186 { return start + i * step; } |
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188 octave_idx_type checkelem (octave_idx_type i) const; |
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189 |
10487 | 190 octave_idx_type length (octave_idx_type) const { return len; } |
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192 octave_idx_type extent (octave_idx_type n) const |
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193 { |
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194 return len ? std::max (n, start + 1 + (step < 0 ? 0 : step * (len - 1))) |
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195 : n; |
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196 } |
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8333 | 198 idx_class_type idx_class (void) const { return class_range; } |
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200 idx_base_rep * sort_uniq_clone (bool uniq = false); |
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202 idx_base_rep * sort_idx (Array<octave_idx_type>&); |
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203 |
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204 bool is_colon_equiv (octave_idx_type n) const |
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205 { return start == 0 && step == 1 && len == n; } |
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8333 | 207 dim_vector orig_dimensions (void) const |
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208 { return dim_vector (1, len); } |
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8333 | 210 octave_idx_type get_start (void) const { return start; } |
1560 | 211 |
8333 | 212 octave_idx_type get_step (void) const { return step; } |
1560 | 213 |
3504 | 214 std::ostream& print (std::ostream& os) const; |
1560 | 215 |
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216 Range unconvert (void) const; |
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217 |
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218 Array<octave_idx_type> as_array (void); |
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219 |
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220 private: |
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221 |
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222 octave_idx_type start, len, step; |
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223 }; |
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224 |
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225 // The integer scalar index. |
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226 class OCTAVE_API idx_scalar_rep : public idx_base_rep |
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227 { |
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228 public: |
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229 |
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230 idx_scalar_rep (void) = delete; |
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231 |
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232 idx_scalar_rep (octave_idx_type i, direct) |
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233 : idx_base_rep (), data (i) { } |
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234 |
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235 // No copying! |
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236 |
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237 idx_scalar_rep (const idx_scalar_rep& idx) = delete; |
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238 |
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239 idx_scalar_rep& operator = (const idx_scalar_rep& idx) = delete; |
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240 |
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241 // Zero-based constructor. |
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242 idx_scalar_rep (octave_idx_type i); |
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243 |
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244 template <typename T> |
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245 idx_scalar_rep (T x); |
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246 |
10487 | 247 octave_idx_type xelem (octave_idx_type) const { return data; } |
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248 |
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249 octave_idx_type checkelem (octave_idx_type i) const; |
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250 |
10487 | 251 octave_idx_type length (octave_idx_type) const { return 1; } |
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252 |
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253 octave_idx_type extent (octave_idx_type n) const |
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254 { return std::max (n, data + 1); } |
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255 |
8333 | 256 idx_class_type idx_class (void) const { return class_scalar; } |
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257 |
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258 idx_base_rep * sort_uniq_clone (bool = false) |
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259 { count++; return this; } |
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260 |
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261 idx_base_rep * sort_idx (Array<octave_idx_type>&); |
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262 |
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263 bool is_colon_equiv (octave_idx_type n) const |
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264 { return n == 1 && data == 0; } |
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265 |
10487 | 266 dim_vector orig_dimensions (void) const { return dim_vector (1, 1); } |
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267 |
8333 | 268 octave_idx_type get_data (void) const { return data; } |
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269 |
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270 std::ostream& print (std::ostream& os) const; |
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271 |
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272 double unconvert (void) const; |
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273 |
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274 Array<octave_idx_type> as_array (void); |
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275 |
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276 private: |
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277 |
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278 octave_idx_type data; |
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279 }; |
4504 | 280 |
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281 // The integer vector index. |
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282 class OCTAVE_API idx_vector_rep : public idx_base_rep |
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283 { |
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284 public: |
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285 |
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286 idx_vector_rep (void) |
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287 : data (nullptr), len (0), ext (0), aowner (nullptr), orig_dims () |
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288 { } |
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289 |
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290 // Direct constructor. |
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291 idx_vector_rep (octave_idx_type *_data, octave_idx_type _len, |
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292 octave_idx_type _ext, const dim_vector& od, direct) |
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293 : idx_base_rep (), data (_data), len (_len), ext (_ext), |
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294 aowner (nullptr), orig_dims (od) |
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295 { } |
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296 |
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297 // Zero-based constructor. |
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298 idx_vector_rep (const Array<octave_idx_type>& inda); |
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299 |
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300 idx_vector_rep (const Array<octave_idx_type>& inda, |
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301 octave_idx_type _ext, direct); |
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302 |
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303 template <typename T> |
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304 idx_vector_rep (const Array<T>&); |
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305 |
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306 idx_vector_rep (bool); |
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307 |
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308 idx_vector_rep (const Array<bool>&, octave_idx_type = -1); |
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309 |
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310 idx_vector_rep (const Sparse<bool>&); |
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311 |
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312 // No copying! |
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313 |
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314 idx_vector_rep (const idx_vector_rep& idx) = delete; |
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315 |
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316 idx_vector_rep& operator = (const idx_vector_rep& idx) = delete; |
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317 |
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318 ~idx_vector_rep (void); |
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319 |
10487 | 320 octave_idx_type xelem (octave_idx_type i) const { return data[i]; } |
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321 |
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322 octave_idx_type checkelem (octave_idx_type i) const; |
4653 | 323 |
10487 | 324 octave_idx_type length (octave_idx_type) const { return len; } |
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325 |
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326 octave_idx_type extent (octave_idx_type n) const |
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327 { return std::max (n, ext); } |
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328 |
8333 | 329 idx_class_type idx_class (void) const { return class_vector; } |
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330 |
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331 idx_base_rep * sort_uniq_clone (bool uniq = false); |
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332 |
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333 idx_base_rep * sort_idx (Array<octave_idx_type>&); |
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334 |
10487 | 335 dim_vector orig_dimensions (void) const { return orig_dims; } |
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336 |
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337 const octave_idx_type * get_data (void) const { return data; } |
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338 |
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339 std::ostream& print (std::ostream& os) const; |
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340 |
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341 Array<double> unconvert (void) const; |
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342 |
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343 Array<octave_idx_type> as_array (void); |
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344 |
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345 private: |
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346 |
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347 const octave_idx_type *data; |
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348 octave_idx_type len; |
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349 octave_idx_type ext; |
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350 |
10487 | 351 // This is a trick to allow user-given zero-based arrays to be used |
352 // as indices without copying. If the following pointer is nonzero, | |
353 // we do not own the data, but rather have an Array<octave_idx_type> | |
354 // object that provides us the data. Note that we need a pointer | |
355 // because we deferred the Array<T> declaration and we do not want | |
356 // it yet to be defined. | |
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357 |
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358 Array<octave_idx_type> *aowner; |
1560 | 359 |
4653 | 360 dim_vector orig_dims; |
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361 }; |
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362 |
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363 // The logical mask index. |
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364 class OCTAVE_API idx_mask_rep : public idx_base_rep |
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365 { |
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366 public: |
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367 |
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368 idx_mask_rep (void) = delete; |
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369 |
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370 // Direct constructor. |
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371 idx_mask_rep (bool *_data, octave_idx_type _len, |
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372 octave_idx_type _ext, const dim_vector& od, direct) |
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373 : idx_base_rep (), data (_data), len (_len), ext (_ext), |
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374 lsti (-1), lste (-1), aowner (nullptr), orig_dims (od) |
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375 { } |
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376 |
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377 idx_mask_rep (bool); |
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378 |
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379 idx_mask_rep (const Array<bool>&, octave_idx_type = -1); |
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380 |
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381 // No copying! |
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382 |
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383 idx_mask_rep (const idx_mask_rep& idx) = delete; |
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384 |
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385 idx_mask_rep& operator = (const idx_mask_rep& idx) = delete; |
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386 |
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387 ~idx_mask_rep (void); |
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388 |
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389 octave_idx_type xelem (octave_idx_type i) const; |
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390 |
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391 octave_idx_type checkelem (octave_idx_type i) const; |
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392 |
10487 | 393 octave_idx_type length (octave_idx_type) const { return len; } |
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394 |
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395 octave_idx_type extent (octave_idx_type n) const |
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396 { return std::max (n, ext); } |
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397 |
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398 idx_class_type idx_class (void) const { return class_mask; } |
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399 |
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400 idx_base_rep * sort_uniq_clone (bool = false) |
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401 { count++; return this; } |
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402 |
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403 idx_base_rep * sort_idx (Array<octave_idx_type>&); |
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404 |
10487 | 405 dim_vector orig_dimensions (void) const { return orig_dims; } |
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406 |
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407 bool is_colon_equiv (octave_idx_type n) const |
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408 { return len == n && ext == n; } |
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409 |
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410 const bool * get_data (void) const { return data; } |
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411 |
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412 std::ostream& print (std::ostream& os) const; |
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413 |
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414 Array<bool> unconvert (void) const; |
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415 |
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416 Array<octave_idx_type> as_array (void); |
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417 |
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418 private: |
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419 |
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420 const bool *data; |
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421 octave_idx_type len; |
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422 octave_idx_type ext; |
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423 |
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424 // FIXME: I'm not sure if this is a good design. Maybe it would be |
10487 | 425 // better to employ some sort of generalized iteration scheme. |
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426 mutable octave_idx_type lsti; |
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427 mutable octave_idx_type lste; |
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428 |
10487 | 429 // This is a trick to allow user-given mask arrays to be used as |
430 // indices without copying. If the following pointer is nonzero, we | |
431 // do not own the data, but rather have an Array<bool> object that | |
432 // provides us the data. Note that we need a pointer because we | |
433 // deferred the Array<T> declaration and we do not want it yet to be | |
434 // defined. | |
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435 |
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436 Array<bool> *aowner; |
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437 |
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438 dim_vector orig_dims; |
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439 }; |
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440 |
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441 idx_vector (idx_base_rep *r) : rep (r) { } |
1560 | 442 |
10487 | 443 // The shared empty vector representation (for fast default |
444 // constructor). | |
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445 static idx_vector_rep *nil_rep (void); |
4938 | 446 |
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447 // The shared empty vector representation with the error flag set. |
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448 static idx_vector_rep *err_rep (void); |
4938 | 449 |
10487 | 450 // If there was an error in constructing the rep, replace it with |
451 // empty vector for safety. | |
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452 void chkerr (void) |
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453 { |
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454 if (rep->err) |
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455 { |
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456 if (--rep->count == 0) |
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457 delete rep; |
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458 rep = err_rep (); |
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459 rep->count++; |
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460 } |
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461 } |
1560 | 462 |
1 | 463 public: |
1551 | 464 |
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465 // Fast empty constructor. |
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466 idx_vector (void) : rep (nil_rep ()) { rep->count++; } |
1560 | 467 |
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468 // Zero-based constructors (for use from C++). |
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469 idx_vector (octave_idx_type i) : rep (new idx_scalar_rep (i)) |
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470 { chkerr (); } |
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471 |
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472 #if OCTAVE_SIZEOF_F77_INT_TYPE != OCTAVE_SIZEOF_IDX_TYPE |
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473 idx_vector (octave_f77_int_type i) |
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474 : rep (new idx_scalar_rep (static_cast<octave_idx_type> (i))) |
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475 { chkerr (); } |
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476 #endif |
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477 |
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478 idx_vector (octave_idx_type start, octave_idx_type limit, |
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479 octave_idx_type step = 1) |
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480 : rep (new idx_range_rep (start, limit, step)) |
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481 { chkerr (); } |
1560 | 482 |
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483 static idx_vector |
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484 make_range (octave_idx_type start, octave_idx_type step, |
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485 octave_idx_type len) |
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486 { |
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487 return idx_vector (new idx_range_rep (start, len, step, DIRECT)); |
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488 } |
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489 |
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490 idx_vector (const Array<octave_idx_type>& inda) |
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491 : rep (new idx_vector_rep (inda)) |
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492 { chkerr (); } |
1560 | 493 |
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494 // Directly pass extent, no checking. |
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495 idx_vector (const Array<octave_idx_type>& inda, octave_idx_type ext) |
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496 : rep (new idx_vector_rep (inda, ext, DIRECT)) |
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497 { } |
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498 |
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499 // Colon is best constructed by simply copying (or referencing) this member. |
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500 static const idx_vector colon; |
4938 | 501 |
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502 // or passing ':' here |
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503 idx_vector (char c) : rep (new idx_colon_rep (c)) { chkerr (); } |
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504 |
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505 // Conversion constructors (used by interpreter). |
1560 | 506 |
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507 template <typename T> |
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508 idx_vector (octave_int<T> x) : rep (new idx_scalar_rep (x)) { chkerr (); } |
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509 |
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510 idx_vector (double x) : rep (new idx_scalar_rep (x)) { chkerr (); } |
2386 | 511 |
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512 idx_vector (float x) : rep (new idx_scalar_rep (x)) { chkerr (); } |
3928 | 513 |
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514 // A scalar bool does not necessarily map to scalar index. |
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515 idx_vector (bool x) : rep (new idx_mask_rep (x)) { chkerr (); } |
1560 | 516 |
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517 template <typename T> |
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518 idx_vector (const Array<octave_int<T>>& nda) : rep (new idx_vector_rep (nda)) |
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519 { chkerr (); } |
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520 |
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521 idx_vector (const Array<double>& nda) : rep (new idx_vector_rep (nda)) |
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522 { chkerr (); } |
2828 | 523 |
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524 idx_vector (const Array<float>& nda) : rep (new idx_vector_rep (nda)) |
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525 { chkerr (); } |
4938 | 526 |
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527 idx_vector (const Array<bool>& nda); |
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528 |
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529 idx_vector (const Range& r) |
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530 : rep (new idx_range_rep (r)) |
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531 { chkerr (); } |
2828 | 532 |
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533 idx_vector (const Sparse<bool>& nda) : rep (new idx_vector_rep (nda)) |
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534 { chkerr (); } |
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535 |
4979 | 536 idx_vector (const idx_vector& a) : rep (a.rep) { rep->count++; } |
1551 | 537 |
2802 | 538 ~idx_vector (void) |
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539 { |
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540 if (--rep->count == 0) |
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541 delete rep; |
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542 } |
1 | 543 |
1560 | 544 idx_vector& operator = (const idx_vector& a) |
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545 { |
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546 if (this != &a) |
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547 { |
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548 if (--rep->count == 0) |
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549 delete rep; |
1 | 550 |
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551 rep = a.rep; |
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552 rep->count++; |
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553 } |
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554 return *this; |
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555 } |
1551 | 556 |
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557 idx_class_type idx_class (void) const { return rep->idx_class (); } |
1560 | 558 |
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559 octave_idx_type length (octave_idx_type n = 0) const |
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560 { return rep->length (n); } |
191 | 561 |
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562 octave_idx_type extent (octave_idx_type n) const |
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563 { return rep->extent (n); } |
1 | 564 |
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565 octave_idx_type xelem (octave_idx_type n) const |
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566 { return rep->xelem (n); } |
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567 |
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568 octave_idx_type checkelem (octave_idx_type n) const |
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569 { return rep->xelem (n); } |
1551 | 570 |
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571 octave_idx_type operator () (octave_idx_type n) const |
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572 { return rep->xelem (n); } |
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573 |
8333 | 574 operator bool (void) const |
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575 { return ! rep->err; } |
1 | 576 |
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577 bool is_colon (void) const |
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578 { return rep->idx_class () == class_colon; } |
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579 |
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580 bool is_scalar (void) const |
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581 { return rep->idx_class () == class_scalar; } |
1 | 582 |
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583 bool is_range (void) const |
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584 { return rep->idx_class () == class_range; } |
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585 |
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586 bool is_colon_equiv (octave_idx_type n) const |
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587 { return rep->is_colon_equiv (n); } |
3079 | 588 |
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589 idx_vector sorted (bool uniq = false) const |
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590 { return idx_vector (rep->sort_uniq_clone (uniq)); } |
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592 idx_vector sorted (Array<octave_idx_type>& sidx) const |
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593 { return idx_vector (rep->sort_idx (sidx)); } |
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594 |
4653 | 595 dim_vector orig_dimensions (void) const { return rep->orig_dimensions (); } |
4504 | 596 |
8333 | 597 octave_idx_type orig_rows (void) const |
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598 { return orig_dimensions () (0); } |
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599 |
8333 | 600 octave_idx_type orig_columns (void) const |
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601 { return orig_dimensions () (1); } |
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602 |
2663 | 603 int orig_empty (void) const |
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604 { return (! is_colon () && orig_dimensions ().any_zero ()); } |
2663 | 605 |
4653 | 606 // i/o |
1 | 607 |
3504 | 608 std::ostream& print (std::ostream& os) const { return rep->print (os); } |
1560 | 609 |
3504 | 610 friend std::ostream& operator << (std::ostream& os, const idx_vector& a) |
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611 { return a.print (os); } |
1560 | 612 |
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613 // Slice with specializations. No checking of bounds! |
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614 // |
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615 // This is equivalent to the following loop (but much faster): |
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616 // |
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617 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
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618 // dest[i] = src[idx(i)]; |
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619 // return i; |
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620 // |
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621 template <typename T> |
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622 octave_idx_type |
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623 index (const T *src, octave_idx_type n, T *dest) const |
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624 { |
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625 octave_idx_type len = rep->length (n); |
10487 | 626 |
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627 switch (rep->idx_class ()) |
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628 { |
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629 case class_colon: |
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630 std::copy_n (src, len, dest); |
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631 break; |
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633 case class_range: |
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634 { |
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635 idx_range_rep *r = dynamic_cast<idx_range_rep *> (rep); |
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636 octave_idx_type start = r->get_start (); |
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637 octave_idx_type step = r->get_step (); |
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638 const T *ssrc = src + start; |
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639 if (step == 1) |
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640 std::copy_n (ssrc, len, dest); |
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641 else if (step == -1) |
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642 std::reverse_copy (ssrc - len + 1, ssrc + 1, dest); |
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643 else if (step == 0) |
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644 std::fill_n (dest, len, *ssrc); |
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645 else |
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646 { |
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647 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step) |
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648 dest[i] = ssrc[j]; |
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649 } |
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650 } |
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651 break; |
10487 | 652 |
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653 case class_scalar: |
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654 { |
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655 idx_scalar_rep *r = dynamic_cast<idx_scalar_rep *> (rep); |
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656 dest[0] = src[r->get_data ()]; |
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657 } |
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658 break; |
10487 | 659 |
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660 case class_vector: |
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661 { |
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662 idx_vector_rep *r = dynamic_cast<idx_vector_rep *> (rep); |
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663 const octave_idx_type *data = r->get_data (); |
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664 for (octave_idx_type i = 0; i < len; i++) |
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665 dest[i] = src[data[i]]; |
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666 } |
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667 break; |
10487 | 668 |
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669 case class_mask: |
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670 { |
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671 idx_mask_rep *r = dynamic_cast<idx_mask_rep *> (rep); |
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672 const bool *data = r->get_data (); |
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673 octave_idx_type ext = r->extent (0); |
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674 for (octave_idx_type i = 0; i < ext; i++) |
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675 if (data[i]) *dest++ = src[i]; |
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676 } |
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677 break; |
10487 | 678 |
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679 default: |
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680 assert (false); |
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681 break; |
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682 } |
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683 |
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684 return len; |
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685 } |
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686 |
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687 // Slice assignment with specializations. No checking of bounds! |
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688 // |
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689 // This is equivalent to the following loop (but much faster): |
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690 // |
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691 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
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692 // dest[idx(i)] = src[i]; |
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693 // return i; |
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694 // |
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695 template <typename T> |
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696 octave_idx_type |
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697 assign (const T *src, octave_idx_type n, T *dest) const |
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698 { |
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699 octave_idx_type len = rep->length (n); |
10487 | 700 |
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701 switch (rep->idx_class ()) |
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702 { |
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703 case class_colon: |
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704 std::copy_n (src, len, dest); |
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705 break; |
10487 | 706 |
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707 case class_range: |
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708 { |
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709 idx_range_rep *r = dynamic_cast<idx_range_rep *> (rep); |
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710 octave_idx_type start = r->get_start (); |
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711 octave_idx_type step = r->get_step (); |
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712 T *sdest = dest + start; |
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713 if (step == 1) |
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714 std::copy_n (src, len, sdest); |
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17744
diff
changeset
|
715 else if (step == -1) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
716 std::reverse_copy (src, src + len, sdest - len + 1); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
717 else |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
718 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
719 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
720 sdest[j] = src[i]; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
721 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
722 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
723 break; |
10487 | 724 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
725 case class_scalar: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
726 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
727 idx_scalar_rep *r = dynamic_cast<idx_scalar_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
728 dest[r->get_data ()] = src[0]; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
729 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
730 break; |
10487 | 731 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
732 case class_vector: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
733 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
734 idx_vector_rep *r = dynamic_cast<idx_vector_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
735 const octave_idx_type *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
736 for (octave_idx_type i = 0; i < len; i++) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
737 dest[data[i]] = src[i]; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
738 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
739 break; |
10487 | 740 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
741 case class_mask: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
742 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
743 idx_mask_rep *r = dynamic_cast<idx_mask_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
744 const bool *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
745 octave_idx_type ext = r->extent (0); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
746 for (octave_idx_type i = 0; i < ext; i++) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
747 if (data[i]) dest[i] = *src++; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
748 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
749 break; |
10487 | 750 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
751 default: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
752 assert (false); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
753 break; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
754 } |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
755 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
756 return len; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
757 } |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
758 |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
21574
diff
changeset
|
759 // Slice fill with specializations. No checking of bounds! |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
760 // |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
761 // This is equivalent to the following loop (but much faster): |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
762 // |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
763 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
764 // dest[idx(i)] = val; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
765 // return i; |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
766 // |
21139
538b57866b90
consistently use "typename" intead of "class" in template declarations
John W. Eaton <jwe@octave.org>
parents:
21137
diff
changeset
|
767 template <typename T> |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
768 octave_idx_type |
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
769 fill (const T& val, octave_idx_type n, T *dest) const |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
770 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
771 octave_idx_type len = rep->length (n); |
10487 | 772 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
773 switch (rep->idx_class ()) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
774 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
775 case class_colon: |
23420
1fee389bd04b
Use std::copy_n rather than std::copy for clarity in liboctave/array.
Rik <rik@octave.org>
parents:
23401
diff
changeset
|
776 std::fill_n (dest, len, val); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
777 break; |
10487 | 778 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
779 case class_range: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
780 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
781 idx_range_rep *r = dynamic_cast<idx_range_rep *> (rep); |
18084
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
782 octave_idx_type start = r->get_start (); |
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
783 octave_idx_type step = r->get_step (); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
784 T *sdest = dest + start; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
785 if (step == 1) |
23420
1fee389bd04b
Use std::copy_n rather than std::copy for clarity in liboctave/array.
Rik <rik@octave.org>
parents:
23401
diff
changeset
|
786 std::fill_n (sdest, len, val); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
787 else if (step == -1) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
788 std::fill (sdest - len + 1, sdest + 1, val); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
789 else |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
790 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
791 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
792 sdest[j] = val; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
793 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
794 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
795 break; |
10487 | 796 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
797 case class_scalar: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
798 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
799 idx_scalar_rep *r = dynamic_cast<idx_scalar_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
800 dest[r->get_data ()] = val; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
801 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
802 break; |
10487 | 803 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
804 case class_vector: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
805 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
806 idx_vector_rep *r = dynamic_cast<idx_vector_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
807 const octave_idx_type *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
808 for (octave_idx_type i = 0; i < len; i++) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
809 dest[data[i]] = val; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
810 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
811 break; |
10487 | 812 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
813 case class_mask: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
814 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
815 idx_mask_rep *r = dynamic_cast<idx_mask_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
816 const bool *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
817 octave_idx_type ext = r->extent (0); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
818 for (octave_idx_type i = 0; i < ext; i++) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
819 if (data[i]) dest[i] = val; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
820 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
821 break; |
10487 | 822 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
823 default: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
824 assert (false); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
825 break; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
826 } |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
827 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
828 return len; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
829 } |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
830 |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
21574
diff
changeset
|
831 // Generic non-breakable indexed loop. The loop body should be |
10487 | 832 // encapsulated in a single functor body. This is equivalent to the |
833 // following loop (but faster, at least for simple inlined bodies): | |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
834 // |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
835 // for (octave_idx_type i = 0; i < idx->length (n); i++) body (idx(i)); |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
836 |
21139
538b57866b90
consistently use "typename" intead of "class" in template declarations
John W. Eaton <jwe@octave.org>
parents:
21137
diff
changeset
|
837 template <typename Functor> |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
838 void |
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
839 loop (octave_idx_type n, Functor body) const |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
840 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
841 octave_idx_type len = rep->length (n); |
10487 | 842 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
843 switch (rep->idx_class ()) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
844 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
845 case class_colon: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
846 for (octave_idx_type i = 0; i < len; i++) body (i); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
847 break; |
10487 | 848 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
849 case class_range: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
850 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
851 idx_range_rep *r = dynamic_cast<idx_range_rep *> (rep); |
18084
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
852 octave_idx_type start = r->get_start (); |
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
853 octave_idx_type step = r->get_step (); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
854 octave_idx_type i, j; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
855 if (step == 1) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
856 for (i = start, j = start + len; i < j; i++) body (i); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
857 else if (step == -1) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
858 for (i = start, j = start - len; i > j; i--) body (i); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
859 else |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
860 for (i = 0, j = start; i < len; i++, j += step) body (j); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
861 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
862 break; |
10487 | 863 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
864 case class_scalar: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
865 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
866 idx_scalar_rep *r = dynamic_cast<idx_scalar_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
867 body (r->get_data ()); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
868 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
869 break; |
10487 | 870 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
871 case class_vector: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
872 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
873 idx_vector_rep *r = dynamic_cast<idx_vector_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
874 const octave_idx_type *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
875 for (octave_idx_type i = 0; i < len; i++) body (data[i]); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
876 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
877 break; |
10487 | 878 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
879 case class_mask: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
880 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
881 idx_mask_rep *r = dynamic_cast<idx_mask_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
882 const bool *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
883 octave_idx_type ext = r->extent (0); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
884 for (octave_idx_type i = 0; i < ext; i++) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
885 if (data[i]) body (i); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
886 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
887 break; |
10487 | 888 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
889 default: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
890 assert (false); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
891 break; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
892 } |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
893 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
894 } |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
895 |
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
21574
diff
changeset
|
896 // Generic breakable indexed loop. The loop body should be |
10487 | 897 // encapsulated in a single functor body. This is equivalent to the |
898 // following loop (but faster, at least for simple inlined bodies): | |
8290
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>
parents:
7573
diff
changeset
|
900 // for (octave_idx_type i = 0; i < idx->length (n); i++) |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
901 // if (body (idx(i))) break; |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
902 // return i; |
11586
12df7854fa7c
strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
|
903 // |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
904 |
21139
538b57866b90
consistently use "typename" intead of "class" in template declarations
John W. Eaton <jwe@octave.org>
parents:
21137
diff
changeset
|
905 template <typename Functor> |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
906 octave_idx_type |
8934
c2099a4d12ea
partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents:
8920
diff
changeset
|
907 bloop (octave_idx_type n, Functor body) const |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
908 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
909 octave_idx_type len = rep->length (n), ret; |
10487 | 910 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
911 switch (rep->idx_class ()) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
912 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
913 case class_colon: |
8290
7cbe01c21986
improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents:
7573
diff
changeset
|
914 { |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
915 octave_idx_type i; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
916 for (i = 0; i < len && body (i); i++) ; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
917 ret = i; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
918 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
919 break; |
10487 | 920 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
921 case class_range: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
922 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
923 idx_range_rep *r = dynamic_cast<idx_range_rep *> (rep); |
18084
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
924 octave_idx_type start = r->get_start (); |
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
925 octave_idx_type step = r->get_step (); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
926 octave_idx_type i, j; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
927 if (step == 1) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
928 for (i = start, j = start + len; i < j && body (i); i++) ; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
929 else if (step == -1) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
930 for (i = start, j = start - len; i > j && body (i); i--) ; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
931 else |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
932 for (i = 0, j = start; i < len && body (j); i++, j += step) ; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
933 ret = i; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
934 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
935 break; |
10487 | 936 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
937 case class_scalar: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
938 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
939 idx_scalar_rep *r = dynamic_cast<idx_scalar_rep *> (rep); |
23450
855122b993da
maint: Wrap tertiary operator in parentheses "(COND ? x : y)".
Rik <rik@octave.org>
parents:
23446
diff
changeset
|
940 ret = (body (r->get_data ()) ? 1 : 0); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
941 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
942 break; |
10487 | 943 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
944 case class_vector: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
945 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
946 idx_vector_rep *r = dynamic_cast<idx_vector_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
947 const octave_idx_type *data = r->get_data (); |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
948 octave_idx_type i; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
949 for (i = 0; i < len && body (data[i]); i++) ; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
950 ret = i; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
951 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
952 break; |
10487 | 953 |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
954 case class_mask: |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
955 { |
23432
e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
Rik <rik@octave.org>
parents:
23420
diff
changeset
|
956 idx_mask_rep *r = dynamic_cast<idx_mask_rep *> (rep); |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
957 const bool *data = r->get_data (); |
18084
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
958 octave_idx_type ext = r->extent (0); |
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
959 octave_idx_type j = 0; |
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
960 for (octave_idx_type i = 0; i < ext; i++) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
961 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
962 if (data[i]) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
963 { |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
964 if (body (i)) |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
965 break; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
966 else |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
967 j++; |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
968 } |
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
969 } |
9985
43a29eeda994
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970 |
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971 ret = j; |
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972 } |
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973 break; |
10487 | 974 |
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975 default: |
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976 assert (false); |
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977 break; |
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978 } |
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979 |
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980 return ret; |
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981 } |
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982 |
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983 // Rationale: |
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984 // This method is the key to "smart indexing". When indexing cartesian |
10487 | 985 // arrays, sometimes consecutive index vectors can be reduced into a |
986 // single index. If rows (A) = k and i.maybe_reduce (j) gives k, then | |
987 // A(i,j)(:) is equal to A(k)(:). | |
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988 |
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989 // If the next index can be reduced, returns true and updates this. |
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990 bool maybe_reduce (octave_idx_type n, const idx_vector& j, |
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991 octave_idx_type nj); |
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992 |
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993 bool is_cont_range (octave_idx_type n, |
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994 octave_idx_type& l, octave_idx_type& u) const; |
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995 |
9725 | 996 // Returns the increment for ranges and colon, 0 for scalars and empty |
997 // vectors, 1st difference otherwise. | |
998 octave_idx_type increment (void) const; | |
999 | |
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1000 idx_vector |
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1001 complement (octave_idx_type n) const; |
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1002 |
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1003 bool is_permutation (octave_idx_type n) const; |
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1004 |
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1005 // Returns the inverse permutation. If this is not a permutation on 1:n, the |
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1006 // result is undefined (but no error unless extent () != n). |
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1007 idx_vector inverse_permutation (octave_idx_type n) const; |
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1008 |
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1009 // Copies all the indices to a given array. Not allowed for colons. |
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1010 void copy_data (octave_idx_type *data) const; |
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1011 |
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1012 // If the index is a mask, convert it to index vector. |
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1013 idx_vector unmask (void) const; |
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1014 |
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1015 // Unconverts the index to a scalar, Range, double array or a mask. |
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1016 void unconvert (idx_class_type& iclass, |
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1017 double& scalar, Range& range, |
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1018 Array<double>& array, Array<bool>& mask) const; |
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1019 |
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1020 Array<octave_idx_type> as_array (void) const; |
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1021 |
10487 | 1022 // Raw pointer to index array. This is non-const because it may be |
1023 // necessary to mutate the index. | |
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1024 const octave_idx_type * raw (void); |
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1025 |
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1026 bool isvector (void) const; |
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1027 |
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1028 // FIXME: these are here for compatibility. They should be removed |
8333 | 1029 // when no longer in use. |
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1030 |
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1031 octave_idx_type elem (octave_idx_type n) const |
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1032 { return (*this) (n); } |
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1033 |
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1034 bool is_colon_equiv (octave_idx_type n, int) const |
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1035 { return is_colon_equiv (n); } |
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1036 |
8333 | 1037 octave_idx_type |
1038 freeze (octave_idx_type z_len, const char *tag, bool resize_ok = false); | |
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1039 |
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1040 void sort (bool uniq = false) |
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1041 { *this = sorted (uniq); } |
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1042 |
8333 | 1043 octave_idx_type ones_count (void) const; |
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1044 |
8333 | 1045 octave_idx_type max (void) const { return extent (1) - 1; } |
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1046 |
1 | 1047 private: |
1048 | |
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1049 idx_base_rep *rep; |
1 | 1050 |
1051 }; | |
1052 | |
1053 #endif |