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annotate liboctave/idx-vector.h @ 11523:fd0a3ac60b0e

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author John W. Eaton <jwe@octave.org>
date Fri, 14 Jan 2011 05:47:45 -0500
parents b3f511c48b14
children 12df7854fa7c
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1 /*
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2
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3 Copyright (C) 1993-2011 John W. Eaton
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4 Copyright (C) 2008-2009 Jaroslav Hajek
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5 Copyright (C) 2009 VZLU Prague
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6
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7 This file is part of Octave.
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8
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9 Octave is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 3 of the License, or (at your
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12 option) any later version.
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13
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14 Octave is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with Octave; see the file COPYING. If not, see
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21 <http://www.gnu.org/licenses/>.
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23 */
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25 #if !defined (octave_idx_vector_h)
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26 #define octave_idx_vector_h 1
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27
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28 #include <cassert>
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29
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30 #include <algorithm>
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31 #include <iosfwd>
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32
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33 #include "dim-vector.h"
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34 #include "oct-inttypes.h"
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35 #include "oct-alloc.h"
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36 #include "oct-mem.h"
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37
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38 template<class T> class Array;
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39 template<class T> class Sparse;
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40 class Range;
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41
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42 // Design rationale:
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43 // idx_vector is a reference-counting, polymorphic pointer, that can contain
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44 // 4 types of index objects: a magic colon, a range, a scalar, or an index vector.
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45 // Polymorphic methods for single element access are provided, as well as
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46 // templates implementing "early dispatch", i.e. hoisting the checks for index
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47 // type out of loops.
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49 class
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50 OCTAVE_API
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51 idx_vector
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52 {
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53 public:
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54
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55 enum idx_class_type
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56 {
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57 class_invalid = -1,
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58 class_colon = 0,
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59 class_range,
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60 class_scalar,
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61 class_vector,
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62 class_mask
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63 };
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64
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65 private:
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66
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67 class OCTAVE_API idx_base_rep
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68 {
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69 public:
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70 idx_base_rep (void) : count (1), err (false) { }
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71
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72 virtual ~idx_base_rep (void) { }
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73
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74 // Non-range-checking element query.
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75 virtual octave_idx_type xelem (octave_idx_type i) const = 0;
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76
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77 // Range-checking element query.
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78 virtual octave_idx_type checkelem (octave_idx_type i) const = 0;
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79
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80 // Length of the index vector.
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81 virtual octave_idx_type length (octave_idx_type n) const = 0;
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82
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83 // The maximum index + 1. The actual dimension is passed in.
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84 virtual octave_idx_type extent (octave_idx_type n) const = 0;
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85
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86 // Index class.
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87 virtual idx_class_type idx_class (void) const { return class_invalid; }
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88
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89 // Sorts, maybe uniqifies, and returns a clone object pointer.
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90 virtual idx_base_rep *sort_uniq_clone (bool uniq = false) = 0;
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91 // Sorts, and returns a sorting permutation (aka Array::sort).
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92 virtual idx_base_rep *sort_idx (Array<octave_idx_type>&) = 0;
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93
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94 // Checks whether the index is colon or a range equivalent to colon.
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95 virtual bool is_colon_equiv (octave_idx_type) const { return false; }
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96
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97 // The original dimensions of this object (used when subscribing by matrices).
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98 virtual dim_vector orig_dimensions (void) const { return dim_vector (); }
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99
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100 // i/o
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101 virtual std::ostream& print (std::ostream& os) const = 0;
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102
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103 virtual Array<octave_idx_type> as_array (void);
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104
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105 int count;
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106
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107 bool err;
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108
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109 private:
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110
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111 // No copying!
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112 idx_base_rep (const idx_base_rep&);
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113 idx_base_rep& operator = (const idx_base_rep&);
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114 };
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115
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116 // The magic colon index.
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117 class OCTAVE_API idx_colon_rep : public idx_base_rep
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118 {
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119 public:
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120 idx_colon_rep (void) { }
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121
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122 idx_colon_rep (char c);
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123
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124 octave_idx_type xelem (octave_idx_type i) const { return i; }
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125
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126 octave_idx_type checkelem (octave_idx_type i) const;
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127
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128 octave_idx_type length (octave_idx_type n) const { return n; }
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129
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130 octave_idx_type extent (octave_idx_type n) const { return n; }
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131
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132 idx_class_type idx_class (void) const { return class_colon; }
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133
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134 idx_base_rep *sort_uniq_clone (bool = false)
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135 { count++; return this; }
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136
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137 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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138
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139 bool is_colon_equiv (octave_idx_type) const { return true; }
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140
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141 std::ostream& print (std::ostream& os) const;
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142
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143 private:
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144
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145 DECLARE_OCTAVE_ALLOCATOR
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146
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147 // No copying!
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148 idx_colon_rep (const idx_colon_rep& idx);
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149 idx_colon_rep& operator = (const idx_colon_rep& idx);
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150 };
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151
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152 // To distinguish the "direct" constructors that blindly trust the data.
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153 enum direct { DIRECT };
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154
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155 // The integer range index.
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156 class OCTAVE_API idx_range_rep : public idx_base_rep
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157 {
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158 public:
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159 idx_range_rep (octave_idx_type _start, octave_idx_type _len,
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160 octave_idx_type _step, direct)
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161 : idx_base_rep (), start(_start), len(_len), step(_step) { }
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162
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163 idx_range_rep (void)
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164 : start(0), len(0), step(1) { }
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165
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166 // Zero-based constructor.
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167 idx_range_rep (octave_idx_type _start, octave_idx_type _limit,
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168 octave_idx_type _step);
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169
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170 idx_range_rep (const Range&);
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171
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172 octave_idx_type xelem (octave_idx_type i) const
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173 { return start + i * step; }
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174
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175 octave_idx_type checkelem (octave_idx_type i) const;
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176
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177 octave_idx_type length (octave_idx_type) const { return len; }
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178
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179 octave_idx_type extent (octave_idx_type n) const
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180 { return len ? std::max (n, (start + 1 + (step < 0 ? 0 : step * (len - 1)))) : n; }
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181
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182 idx_class_type idx_class (void) const { return class_range; }
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183
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184 idx_base_rep *sort_uniq_clone (bool uniq = false);
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185
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186 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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187
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188 bool is_colon_equiv (octave_idx_type n) const
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189 { return start == 0 && step == 1 && len == n; }
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190
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191 dim_vector orig_dimensions (void) const
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192 { return dim_vector (1, len); }
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193
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194 octave_idx_type get_start (void) const { return start; }
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195
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196 octave_idx_type get_step (void) const { return step; }
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197
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198 std::ostream& print (std::ostream& os) const;
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199
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200 Range unconvert (void) const;
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201
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202 Array<octave_idx_type> as_array (void);
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203
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204 private:
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205
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206 DECLARE_OCTAVE_ALLOCATOR
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207
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208 // No copying!
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209 idx_range_rep (const idx_range_rep& idx);
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210 idx_range_rep& operator = (const idx_range_rep& idx);
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211
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212 octave_idx_type start, len, step;
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213
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214 };
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215
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216 // The integer scalar index.
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217 class OCTAVE_API idx_scalar_rep : public idx_base_rep
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218 {
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219 public:
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220 idx_scalar_rep (octave_idx_type i, direct)
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221 : data (i) { }
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222
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223 idx_scalar_rep (void)
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224 : data (0) { }
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225
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226 // Zero-based constructor.
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227 idx_scalar_rep (octave_idx_type i);
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228
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229 template <class T>
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230 idx_scalar_rep (T x);
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231
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232 octave_idx_type xelem (octave_idx_type) const { return data; }
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233
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234 octave_idx_type checkelem (octave_idx_type i) const;
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235
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236 octave_idx_type length (octave_idx_type) const { return 1; }
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237
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238 octave_idx_type extent (octave_idx_type n) const
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239 { return std::max (n, data + 1); }
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240
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241 idx_class_type idx_class (void) const { return class_scalar; }
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242
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243 idx_base_rep *sort_uniq_clone (bool = false)
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244 { count++; return this; }
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245
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246 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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247
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248 bool is_colon_equiv (octave_idx_type n) const
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249 { return n == 1 && data == 0; }
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250
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251 dim_vector orig_dimensions (void) const { return dim_vector (1, 1); }
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252
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253 octave_idx_type get_data (void) const { return data; }
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254
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255 std::ostream& print (std::ostream& os) const;
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256
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257 double unconvert (void) const;
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258
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259 Array<octave_idx_type> as_array (void);
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260
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261 private:
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262
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263 DECLARE_OCTAVE_ALLOCATOR
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264
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265 // No copying!
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266 idx_scalar_rep (const idx_scalar_rep& idx);
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267 idx_scalar_rep& operator = (const idx_scalar_rep& idx);
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268
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269 octave_idx_type data;
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270
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271 };
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272
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273 // The integer vector index.
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274 class OCTAVE_API idx_vector_rep : public idx_base_rep
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275 {
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276 public:
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277 // Direct constructor.
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278 idx_vector_rep (octave_idx_type *_data, octave_idx_type _len,
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279 octave_idx_type _ext, const dim_vector& od, direct)
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280 : data (_data), len (_len), ext (_ext), aowner (0), orig_dims (od) { }
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281
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282 idx_vector_rep (void)
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283 : data (0), len (0), ext (0), aowner (0), orig_dims ()
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284 { }
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285
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286 // Zero-based constructor.
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287 idx_vector_rep (const Array<octave_idx_type>& inda);
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288
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289 idx_vector_rep (const Array<octave_idx_type>& inda,
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290 octave_idx_type _ext, direct);
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291
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292 template <class T>
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293 idx_vector_rep (const Array<T>&);
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294
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295 idx_vector_rep (bool);
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296
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297 idx_vector_rep (const Array<bool>&, octave_idx_type = -1);
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298
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299 idx_vector_rep (const Sparse<bool>&);
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300
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301 ~idx_vector_rep (void);
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302
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303 octave_idx_type xelem (octave_idx_type i) const { return data[i]; }
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304
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305 octave_idx_type checkelem (octave_idx_type i) const;
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306
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307 octave_idx_type length (octave_idx_type) const { return len; }
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308
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309 octave_idx_type extent (octave_idx_type n) const
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310 { return std::max (n, ext); }
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311
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312 idx_class_type idx_class (void) const { return class_vector; }
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313
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314 idx_base_rep *sort_uniq_clone (bool uniq = false);
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315
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316 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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317
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318 dim_vector orig_dimensions (void) const { return orig_dims; }
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319
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320 const octave_idx_type *get_data (void) const { return data; }
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321
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322 std::ostream& print (std::ostream& os) const;
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323
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324 Array<double> unconvert (void) const;
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325
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326 Array<octave_idx_type> as_array (void);
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327
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328 private:
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329
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330 DECLARE_OCTAVE_ALLOCATOR
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331
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332 // No copying!
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333 idx_vector_rep (const idx_vector_rep& idx);
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334 idx_vector_rep& operator = (const idx_vector_rep& idx);
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335
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336 const octave_idx_type *data;
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337 octave_idx_type len;
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338 octave_idx_type ext;
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339
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340 // This is a trick to allow user-given zero-based arrays to be used
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341 // as indices without copying. If the following pointer is nonzero,
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342 // we do not own the data, but rather have an Array<octave_idx_type>
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343 // object that provides us the data. Note that we need a pointer
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344 // because we deferred the Array<T> declaration and we do not want
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345 // it yet to be defined.
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346
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347 Array<octave_idx_type> *aowner;
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348
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349 dim_vector orig_dims;
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350 };
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351
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352 // The logical mask index.
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353 class OCTAVE_API idx_mask_rep : public idx_base_rep
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354 {
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355 public:
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356 // Direct constructor.
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357 idx_mask_rep (bool *_data, octave_idx_type _len,
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358 octave_idx_type _ext, const dim_vector& od, direct)
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359 : data (_data), len (_len), ext (_ext), lsti (-1), lste (-1),
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360 aowner (0), orig_dims (od) { }
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361
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362 idx_mask_rep (void)
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363 : data (0), len (0), ext (0), lsti (-1), lste (-1), aowner (0),
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364 orig_dims ()
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365 { }
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366
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367 idx_mask_rep (bool);
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368
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369 idx_mask_rep (const Array<bool>&, octave_idx_type = -1);
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370
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371 ~idx_mask_rep (void);
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372
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373 octave_idx_type xelem (octave_idx_type i) const;
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374
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375 octave_idx_type checkelem (octave_idx_type i) const;
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376
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377 octave_idx_type length (octave_idx_type) const { return len; }
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378
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379 octave_idx_type extent (octave_idx_type n) const
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380 { return std::max (n, ext); }
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381
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382 idx_class_type idx_class (void) const { return class_mask; }
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383
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384 idx_base_rep *sort_uniq_clone (bool = false)
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385 { count++; return this; }
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386
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387 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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388
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389 dim_vector orig_dimensions (void) const { return orig_dims; }
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390
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391 bool is_colon_equiv (octave_idx_type n) const
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392 { return len == n && ext == n; }
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393
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394 const bool *get_data (void) const { return data; }
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395
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396 std::ostream& print (std::ostream& os) const;
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397
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398 Array<bool> unconvert (void) const;
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399
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400 Array<octave_idx_type> as_array (void);
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401
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402 private:
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403
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404 DECLARE_OCTAVE_ALLOCATOR
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405
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406 // No copying!
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407 idx_mask_rep (const idx_mask_rep& idx);
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408 idx_mask_rep& operator = (const idx_mask_rep& idx);
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409
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410 const bool *data;
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411 octave_idx_type len;
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412 octave_idx_type ext;
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413
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414 // FIXME: I'm not sure if this is a good design. Maybe it would be
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415 // better to employ some sort of generalized iteration scheme.
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416 mutable octave_idx_type lsti;
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417 mutable octave_idx_type lste;
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418
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419 // This is a trick to allow user-given mask arrays to be used as
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420 // indices without copying. If the following pointer is nonzero, we
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421 // do not own the data, but rather have an Array<bool> object that
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422 // provides us the data. Note that we need a pointer because we
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423 // deferred the Array<T> declaration and we do not want it yet to be
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424 // defined.
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425
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426 Array<bool> *aowner;
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427
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428 dim_vector orig_dims;
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429 };
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430
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431 idx_vector (idx_base_rep *r) : rep (r) { }
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432
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433 // The shared empty vector representation (for fast default
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434 // constructor).
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435 static idx_vector_rep *nil_rep (void)
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436 {
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437 static idx_vector_rep ivr;
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438 return &ivr;
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439 }
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440
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441 // The shared empty vector representation with the error flag set.
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442 static idx_vector_rep *err_rep (void)
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443 {
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444 static idx_vector_rep ivr;
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445 ivr.err = true;
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446 return &ivr;
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447 }
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diff changeset
448
10487
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449 // If there was an error in constructing the rep, replace it with
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450 // empty vector for safety.
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451 void chkerr (void)
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452 {
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453 if (rep->err)
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454 {
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455 if (--rep->count == 0)
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456 delete rep;
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457 rep = err_rep ();
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458 rep->count++;
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diff changeset
459 }
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diff changeset
460 }
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461
1
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462 public:
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463
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diff changeset
464 // Fast empty constructor.
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diff changeset
465 idx_vector (void) : rep (nil_rep ()) { rep->count++; }
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diff changeset
466
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467 // Zero-based constructors (for use from C++).
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diff changeset
468 idx_vector (octave_idx_type i) : rep (new idx_scalar_rep (i))
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diff changeset
469 { chkerr (); }
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diff changeset
470
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diff changeset
471 idx_vector (octave_idx_type start, octave_idx_type limit,
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472 octave_idx_type step = 1)
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473 : rep (new idx_range_rep (start, limit, step))
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diff changeset
474 { chkerr (); }
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diff changeset
475
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diff changeset
476 static idx_vector
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diff changeset
477 make_range (octave_idx_type start, octave_idx_type step,
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diff changeset
478 octave_idx_type len)
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479 {
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480 return idx_vector (new idx_range_rep (start, len, step, DIRECT));
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481 }
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482
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483 idx_vector (const Array<octave_idx_type>& inda)
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484 : rep (new idx_vector_rep (inda))
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diff changeset
485 { chkerr (); }
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diff changeset
486
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diff changeset
487 // Directly pass extent, no checking.
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diff changeset
488 idx_vector (const Array<octave_idx_type>& inda, octave_idx_type ext)
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489 : rep (new idx_vector_rep (inda, ext, DIRECT))
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diff changeset
490 { }
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diff changeset
491
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492 // Colon is best constructed by simply copying (or referencing) this member.
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diff changeset
493 static const idx_vector colon;
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494
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495 // or passing ':' here
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496 idx_vector (char c) : rep (new idx_colon_rep (c)) { chkerr (); }
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diff changeset
497
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diff changeset
498 // Conversion constructors (used by interpreter).
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499
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diff changeset
500 template <class T>
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diff changeset
501 idx_vector (octave_int<T> x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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diff changeset
502
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diff changeset
503 idx_vector (double x) : rep (new idx_scalar_rep (x)) { chkerr (); }
2386
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504
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diff changeset
505 idx_vector (float x) : rep (new idx_scalar_rep (x)) { chkerr (); }
3928
e8627dc4bdf2 [project @ 2002-05-03 19:56:01 by jwe]
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parents: 3504
diff changeset
506
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diff changeset
507 // A scalar bool does not necessarily map to scalar index.
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diff changeset
508 idx_vector (bool x) : rep (new idx_mask_rep (x)) { chkerr (); }
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diff changeset
509
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diff changeset
510 template <class T>
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511 idx_vector (const Array<octave_int<T> >& nda) : rep (new idx_vector_rep (nda))
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512 { chkerr (); }
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diff changeset
513
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514 idx_vector (const Array<double>& nda) : rep (new idx_vector_rep (nda))
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515 { chkerr (); }
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92826d6e8bd9 [project @ 1997-03-25 23:41:41 by jwe]
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diff changeset
516
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517 idx_vector (const Array<float>& nda) : rep (new idx_vector_rep (nda))
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diff changeset
518 { chkerr (); }
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519
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520 idx_vector (const Array<bool>& nda);
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521
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diff changeset
522 idx_vector (const Range& r)
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523 : rep (new idx_range_rep (r))
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524 { chkerr (); }
2828
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525
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526 idx_vector (const Sparse<bool>& nda) : rep (new idx_vector_rep (nda))
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527 { chkerr (); }
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diff changeset
528
4979
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diff changeset
529 idx_vector (const idx_vector& a) : rep (a.rep) { rep->count++; }
1551
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parents: 1315
diff changeset
530
2802
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parents: 2800
diff changeset
531 ~idx_vector (void)
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diff changeset
532 {
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diff changeset
533 if (--rep->count == 0)
10312
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diff changeset
534 delete rep;
1560
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diff changeset
535 }
1
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diff changeset
536
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diff changeset
537 idx_vector& operator = (const idx_vector& a)
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
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parents: 1553
diff changeset
538 {
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
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parents: 1553
diff changeset
539 if (this != &a)
10312
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parents: 10285
diff changeset
540 {
cbc402e64d83 untabify liboctave header files
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parents: 10285
diff changeset
541 if (--rep->count == 0)
cbc402e64d83 untabify liboctave header files
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diff changeset
542 delete rep;
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
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diff changeset
543
10312
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diff changeset
544 rep = a.rep;
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diff changeset
545 rep->count++;
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parents: 10285
diff changeset
546 }
1560
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diff changeset
547 return *this;
1551
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parents: 1315
diff changeset
548 }
8f63ee44726c [project @ 1995-10-08 23:19:55 by jwe]
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parents: 1315
diff changeset
549
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diff changeset
550 idx_class_type idx_class (void) const { return rep->idx_class (); }
1560
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diff changeset
551
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diff changeset
552 octave_idx_type length (octave_idx_type n = 0) const
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diff changeset
553 { return rep->length (n); }
191
b6b4d8c513fe [project @ 1993-10-29 23:41:39 by jwe]
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parents: 164
diff changeset
554
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diff changeset
555 octave_idx_type extent (octave_idx_type n) const
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parents: 7573
diff changeset
556 { return rep->extent (n); }
1
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parents:
diff changeset
557
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diff changeset
558 octave_idx_type xelem (octave_idx_type n) const
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diff changeset
559 { return rep->xelem (n); }
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diff changeset
560
7cbe01c21986 improve dense array indexing
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diff changeset
561 octave_idx_type checkelem (octave_idx_type n) const
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diff changeset
562 { return rep->checkelem (n); }
1551
8f63ee44726c [project @ 1995-10-08 23:19:55 by jwe]
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diff changeset
563
8290
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Jaroslav Hajek <highegg@gmail.com>
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diff changeset
564 octave_idx_type operator () (octave_idx_type n) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff changeset
565 {
7cbe01c21986 improve dense array indexing
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diff changeset
566 #if defined (BOUNDS_CHECKING)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
567 return rep->checkelem (n);
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
568 #else
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
569 return rep->xelem (n);
7cbe01c21986 improve dense array indexing
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diff changeset
570 #endif
7cbe01c21986 improve dense array indexing
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diff changeset
571 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
572
8333
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diff changeset
573 operator bool (void) const
8290
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parents: 7573
diff changeset
574 { return ! rep->err; }
1
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parents:
diff changeset
575
8290
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diff changeset
576 bool is_colon (void) const
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
577 { return rep->idx_class () == class_colon; }
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
578
7cbe01c21986 improve dense array indexing
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diff changeset
579 bool is_scalar (void) const
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
580 { return rep->idx_class () == class_scalar; }
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
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parents:
diff changeset
581
9479
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diff changeset
582 bool is_range (void) const
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
583 { return rep->idx_class () == class_range; }
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
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parents: 8972
diff changeset
584
8290
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diff changeset
585 bool is_colon_equiv (octave_idx_type n) const
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
586 { return rep->is_colon_equiv (n); }
3079
eb827eb9b8ff [project @ 1997-08-03 20:44:07 by jwe]
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parents: 2847
diff changeset
587
8290
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parents: 7573
diff changeset
588 idx_vector sorted (bool uniq = false) const
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
589 { return idx_vector (rep->sort_uniq_clone (uniq)); }
208
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe]
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parents: 191
diff changeset
590
10273
3a8c13b71612 implement special-case optimization for sort of index vectors
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parents: 10158
diff changeset
591 idx_vector sorted (Array<octave_idx_type>& sidx) const
3a8c13b71612 implement special-case optimization for sort of index vectors
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parents: 10158
diff changeset
592 { return idx_vector (rep->sort_idx (sidx)); }
3a8c13b71612 implement special-case optimization for sort of index vectors
Jaroslav Hajek <highegg@gmail.com>
parents: 10158
diff changeset
593
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
jwe
parents: 4650
diff changeset
594 dim_vector orig_dimensions (void) const { return rep->orig_dimensions (); }
4504
f6a61399bc5c [project @ 2003-09-09 17:48:00 by jwe]
jwe
parents: 4461
diff changeset
595
8333
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parents: 8319
diff changeset
596 octave_idx_type orig_rows (void) const
8290
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
597 { return orig_dimensions () (0); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
598
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
599 octave_idx_type orig_columns (void) const
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
600 { return orig_dimensions () (1); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
601
2663
00b2eff19bf5 [project @ 1997-02-08 21:58:49 by jwe]
jwe
parents: 2386
diff changeset
602 int orig_empty (void) const
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
jwe
parents: 4650
diff changeset
603 { return (! is_colon () && orig_dimensions().any_zero ()); }
2663
00b2eff19bf5 [project @ 1997-02-08 21:58:49 by jwe]
jwe
parents: 2386
diff changeset
604
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
jwe
parents: 4650
diff changeset
605 // i/o
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
606
3504
5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe]
jwe
parents: 3503
diff changeset
607 std::ostream& print (std::ostream& os) const { return rep->print (os); }
1560
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
jwe
parents: 1553
diff changeset
608
3504
5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe]
jwe
parents: 3503
diff changeset
609 friend std::ostream& operator << (std::ostream& os, const idx_vector& a)
1560
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
jwe
parents: 1553
diff changeset
610 { return a.print (os); }
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
jwe
parents: 1553
diff changeset
611
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
612 // Slice with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
613 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
614 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
615 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
616 // 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
617 // dest[i] = src[idx(i)];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
618 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
619 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
620 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
621 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
622 index (const T *src, octave_idx_type n, T *dest) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
623 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
624 octave_idx_type len = rep->length (n);
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
625
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
626 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
627 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
628 case class_colon:
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
629 copy_or_memcpy (len, src, dest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
630 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
631
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
632 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
633 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
634 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
635 octave_idx_type start = r->get_start (), step = r->get_step ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
636 const T *ssrc = src + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
637 if (step == 1)
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
638 copy_or_memcpy (len, ssrc, dest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
639 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
640 std::reverse_copy (ssrc - len + 1, ssrc + 1, dest);
8972
5fa53d1b6247 more indexing optimizations
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
641 else if (step == 0)
5fa53d1b6247 more indexing optimizations
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
642 std::fill_n (dest, len, *ssrc);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
643 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
644 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
645 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
646 dest[i] = ssrc[j];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
647 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
648 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
649 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
650
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
651 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
652 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
653 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
654 dest[0] = src[r->get_data ()];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
655 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
656 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
657
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
658 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
659 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
660 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
661 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
662 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
663 dest[i] = src[data[i]];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
664 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
665 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
666
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
667 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
668 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
669 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
670 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
671 octave_idx_type ext = r->extent (0);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
672 for (octave_idx_type i = 0; i < ext; i++)
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
673 if (data[i]) *dest++ = src[i];
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
674 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
675 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
676
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
677 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
678 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
679 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
680 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
681
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
682 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
683 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
684
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
685 // Slice assignment with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
686 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
687 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
688 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
689 // 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
690 // dest[idx(i)] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
691 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
692 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
693 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
694 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
695 assign (const T *src, octave_idx_type n, T *dest) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
696 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
697 octave_idx_type len = rep->length (n);
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
698
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
699 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
700 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
701 case class_colon:
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
702 copy_or_memcpy (len, src, dest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
703 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
704
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
705 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
706 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
707 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
708 octave_idx_type start = r->get_start (), step = r->get_step ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
709 T *sdest = dest + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
710 if (step == 1)
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
711 copy_or_memcpy (len, src, sdest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
712 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
713 std::reverse_copy (src, src + len, sdest - len + 1);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
714 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
715 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
716 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
717 sdest[j] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
718 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
719 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
720 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
721
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
722 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
723 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
724 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
725 dest[r->get_data ()] = src[0];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
726 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
727 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
728
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
729 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
730 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
731 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
732 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
733 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
734 dest[data[i]] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
735 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
736 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
737
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
738 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
739 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
740 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
741 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
742 octave_idx_type ext = r->extent (0);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
743 for (octave_idx_type i = 0; i < ext; i++)
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
744 if (data[i]) dest[i] = *src++;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
745 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
746 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
747
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
748 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
749 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
750 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
751 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
752
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
753 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
754 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
755
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
756 // Slice fill with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
757 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
758 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
759 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
760 // 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
761 // dest[idx(i)] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
762 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
763 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
764 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
765 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
766 fill (const T& val, octave_idx_type n, T *dest) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
767 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
768 octave_idx_type len = rep->length (n);
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
769
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
770 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
771 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
772 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
773 std::fill (dest, dest + len, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
774 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
775
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
776 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
777 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
778 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
779 octave_idx_type start = r->get_start (), step = r->get_step ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
780 T *sdest = dest + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
781 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
782 std::fill (sdest, sdest + len, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
783 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
784 std::fill (sdest - len + 1, sdest + 1, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
785 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
786 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
787 for (octave_idx_type i = 0, j = 0; i < len; i++, j += step)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
788 sdest[j] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
789 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
790 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
791 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
792
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
793 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
794 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
795 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
796 dest[r->get_data ()] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
797 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
798 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
799
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
800 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
801 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
802 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
803 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
804 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
805 dest[data[i]] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
806 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
807 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
808
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
809 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
810 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
811 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
812 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
813 octave_idx_type ext = r->extent (0);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
814 for (octave_idx_type i = 0; i < ext; i++)
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
815 if (data[i]) dest[i] = val;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
816 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
817 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
818
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
819 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
820 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
821 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
822 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
823
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
824 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
825 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
826
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
827 // Generic non-breakable indexed loop. The loop body should be
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
828 // encapsulated in a single functor body. This is equivalent to the
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
829 // following loop (but faster, at least for simple inlined bodies):
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
830 //
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
831 // 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
832
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
833 template <class Functor>
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
834 void
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
835 loop (octave_idx_type n, Functor body) const
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
836 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
837 octave_idx_type len = rep->length (n);
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
838
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
839 switch (rep->idx_class ())
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
840 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
841 case class_colon:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
842 for (octave_idx_type i = 0; i < len; i++) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
843 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
844
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
845 case class_range:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
846 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
847 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
848 octave_idx_type start = r->get_start (), step = r->get_step ();
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
849 octave_idx_type i, j;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
850 if (step == 1)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
851 for (i = start, j = start + len; i < j; i++) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
852 else if (step == -1)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
853 for (i = start, j = start - len; i > j; i--) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
854 else
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
855 for (i = 0, j = start; i < len; i++, j += step) body (j);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
856 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
857 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
858
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
859 case class_scalar:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
860 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
861 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
862 body (r->get_data ());
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
863 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
864 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
865
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
866 case class_vector:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
867 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
868 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
869 const octave_idx_type *data = r->get_data ();
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
870 for (octave_idx_type i = 0; i < len; i++) body (data[i]);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
871 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
872 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
873
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
874 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
875 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
876 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
877 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
878 octave_idx_type ext = r->extent (0);
9985
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
879 for (octave_idx_type i = 0; i < ext; i++)
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
880 if (data[i]) body (i);
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
881 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
882 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
883
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
884 default:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
885 assert (false);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
886 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
887 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
888
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
889 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
890
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
891 // Generic breakable indexed loop. The loop body should be
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
892 // encapsulated in a single functor body. This is equivalent to the
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
893 // 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
894 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
895 // 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
896 // if (body (idx(i))) break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
897 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
898 //
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 template <class Functor>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
901 octave_idx_type
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
902 bloop (octave_idx_type n, Functor body) const
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
903 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
904 octave_idx_type len = rep->length (n), ret;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
905
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
906 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
907 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
908 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
909 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
910 octave_idx_type i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
911 for (i = 0; i < len && body (i); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
912 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
913 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
914 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
915
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
916 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
917 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
918 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
919 octave_idx_type start = r->get_start (), step = r->get_step ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
920 octave_idx_type i, j;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
921 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
922 for (i = start, j = start + len; i < j && body (i); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
923 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
924 for (i = start, j = start - len; i > j && body (i); i--) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
925 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
926 for (i = 0, j = start; i < len && body (j); i++, j += step) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
927 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
928 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
929 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
930
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
931 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
932 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
933 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
934 ret = body (r->get_data ()) ? 1 : 0;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
935 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
936 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
937
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
938 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
939 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
940 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
941 const octave_idx_type *data = r->get_data ();
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
942 octave_idx_type i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
943 for (i = 0; i < len && body (data[i]); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
944 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
945 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
946 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
947
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
948 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
949 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
950 idx_mask_rep * r = dynamic_cast<idx_mask_rep *> (rep);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
951 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
952 octave_idx_type ext = r->extent (0), j = 0;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
953 for (octave_idx_type i = 0; i < ext; i++)
9985
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
954 {
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
955 if (data[i])
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
956 {
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
957 if (body (i))
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
958 break;
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
959 else
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
960 j++;
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
961 }
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
962 }
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
963
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
964 ret = j;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
965 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
966 break;
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
967
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
968 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
969 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
970 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
971 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
972
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
973 return ret;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
974 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
975
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
976 // Rationale:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
977 // This method is the key to "smart indexing". When indexing cartesian
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
978 // arrays, sometimes consecutive index vectors can be reduced into a
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
979 // single index. If rows (A) = k and i.maybe_reduce (j) gives k, then
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
980 // A(i,j)(:) is equal to A(k)(:).
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
981
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
982 // If the next index can be reduced, returns true and updates this.
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
983 bool maybe_reduce (octave_idx_type n, const idx_vector& j,
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
984 octave_idx_type nj);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
985
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
986 bool is_cont_range (octave_idx_type n,
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
987 octave_idx_type& l, octave_idx_type& u) const;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
988
9725
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
989 // Returns the increment for ranges and colon, 0 for scalars and empty
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
990 // vectors, 1st difference otherwise.
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
991 octave_idx_type increment (void) const;
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
992
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
993 idx_vector
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
994 complement (octave_idx_type n) const;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
995
8367
445d27d79f4e support permutation matrix objects
Jaroslav Hajek <highegg@gmail.com>
parents: 8333
diff changeset
996 bool is_permutation (octave_idx_type n) const;
445d27d79f4e support permutation matrix objects
Jaroslav Hajek <highegg@gmail.com>
parents: 8333
diff changeset
997
10512
aac9f4265048 rewrite sparse indexed assignment
Jaroslav Hajek <highegg@gmail.com>
parents: 10489
diff changeset
998 // Returns the inverse permutation. If this is not a permutation on 1:n, the
aac9f4265048 rewrite sparse indexed assignment
Jaroslav Hajek <highegg@gmail.com>
parents: 10489
diff changeset
999 // result is undefined (but no error unless extent () != n).
aac9f4265048 rewrite sparse indexed assignment
Jaroslav Hajek <highegg@gmail.com>
parents: 10489
diff changeset
1000 idx_vector inverse_permutation (octave_idx_type n) const;
aac9f4265048 rewrite sparse indexed assignment
Jaroslav Hajek <highegg@gmail.com>
parents: 10489
diff changeset
1001
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
1002 // Copies all the indices to a given array. Not allowed for colons.
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
1003 void copy_data (octave_idx_type *data) const;
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
1004
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
1005 // If the index is a mask, convert it to index vector.
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
1006 idx_vector unmask (void) const;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
1007
9894
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9886
diff changeset
1008 // Unconverts the index to a scalar, Range, double array or a mask.
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
1009 void unconvert (idx_class_type& iclass,
9894
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9886
diff changeset
1010 double& scalar, Range& range,
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9886
diff changeset
1011 Array<double>& array, Array<bool>& mask) const;
10339
de2d43bcb083 optimize some lazy index operations
Jaroslav Hajek <highegg@gmail.com>
parents: 10312
diff changeset
1012
de2d43bcb083 optimize some lazy index operations
Jaroslav Hajek <highegg@gmail.com>
parents: 10312
diff changeset
1013 Array<octave_idx_type> as_array (void) const;
10475
739109ef88ee helper idx_vector methods
Jaroslav Hajek <highegg@gmail.com>
parents: 10425
diff changeset
1014
10487
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
1015 // Raw pointer to index array. This is non-const because it may be
942386d6d1a5 style fixes
John W. Eaton <jwe@octave.org>
parents: 10486
diff changeset
1016 // necessary to mutate the index.
10475
739109ef88ee helper idx_vector methods
Jaroslav Hajek <highegg@gmail.com>
parents: 10425
diff changeset
1017 const octave_idx_type *raw (void);
10516
f0266ee4aabe optimize some special indexing & assignment cases
Jaroslav Hajek <highegg@gmail.com>
parents: 10512
diff changeset
1018
f0266ee4aabe optimize some special indexing & assignment cases
Jaroslav Hajek <highegg@gmail.com>
parents: 10512
diff changeset
1019 bool is_vector (void) const;
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
1020
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
1021 // FIXME -- these are here for compatibility. They should be removed
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
1022 // when no longer in use.
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1023
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1024 octave_idx_type elem (octave_idx_type n) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1025 { return (*this) (n); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1026
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1027 bool is_colon_equiv (octave_idx_type n, int) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1028 { return is_colon_equiv (n); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1029
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
1030 octave_idx_type
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
1031 freeze (octave_idx_type z_len, const char *tag, bool resize_ok = false);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1032
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1033 void sort (bool uniq = false)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1034 { *this = sorted (uniq); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1035
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
1036 octave_idx_type ones_count (void) const;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1037
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
1038 octave_idx_type max (void) const { return extent (1) - 1; }
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1039
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
1040 private:
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
1041
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
1042 idx_base_rep *rep;
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
1043
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
1044 };
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
1045
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
1046 #endif