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annotate liboctave/idx-vector.h @ 10312:cbc402e64d83

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untabify liboctave header files
author John W. Eaton <jwe@octave.org>
date Thu, 11 Feb 2010 12:14:48 -0500
parents 22a7913bbeb5
children de2d43bcb083
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1 /*
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2
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3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2003,
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4 2004, 2005, 2006, 2007 John W. Eaton
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5 Copyright (C) 2008, 2009 Jaroslav Hajek
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6 Copyright (C) 2009 VZLU Prague
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7
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8 This file is part of Octave.
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9
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10 Octave is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 3 of the License, or (at your
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13 option) any later version.
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14
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15 Octave is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with Octave; see the file COPYING. If not, see
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22 <http://www.gnu.org/licenses/>.
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24 */
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26 #if !defined (octave_idx_vector_h)
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27 #define octave_idx_vector_h 1
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29 #include <cassert>
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30
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31 #include <algorithm>
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32 #include <iosfwd>
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33
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34 #include "dim-vector.h"
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35 #include "oct-inttypes.h"
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36 #include "oct-alloc.h"
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37 #include "oct-mem.h"
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38
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39 template<class T> class Array;
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40 template<class T> class Sparse;
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41 class Range;
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42
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43 // Design rationale:
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44 // idx_vector is a reference-counting, polymorphic pointer, that can contain
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45 // 4 types of index objects: a magic colon, a range, a scalar, or an index vector.
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46 // Polymorphic methods for single element access are provided, as well as
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47 // templates implementing "early dispatch", i.e. hoisting the checks for index
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48 // type out of loops.
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50 class
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51 OCTAVE_API
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52 idx_vector
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53 {
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54 public:
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55
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56 enum idx_class_type
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57 {
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58 class_invalid = -1,
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59 class_colon = 0,
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60 class_range,
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61 class_scalar,
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62 class_vector,
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63 class_mask
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64 };
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65
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66 private:
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67
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68 class OCTAVE_API idx_base_rep
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69 {
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70 public:
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71 idx_base_rep (void) : count (1), err (false) { }
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72
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73 virtual ~idx_base_rep (void) { }
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74
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75 // Non-range-checking element query.
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76 virtual octave_idx_type xelem (octave_idx_type i) const = 0;
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77
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78 // Range-checking element query.
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79 virtual octave_idx_type checkelem (octave_idx_type i) const = 0;
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80
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81 // Length of the index vector.
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82 virtual octave_idx_type length (octave_idx_type n) const = 0;
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83
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84 // The maximum index + 1. The actual dimension is passed in.
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85 virtual octave_idx_type extent (octave_idx_type n) const = 0;
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86
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87 // Index class.
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88 virtual idx_class_type idx_class (void) const { return class_invalid; }
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89
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90 // Sorts, maybe uniqifies, and returns a clone object pointer.
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91 virtual idx_base_rep *sort_uniq_clone (bool uniq = false) = 0;
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92 // Sorts, and returns a sorting permutation (aka Array::sort).
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93 virtual idx_base_rep *sort_idx (Array<octave_idx_type>&) = 0;
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94
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95 // Checks whether the index is colon or a range equivalent to colon.
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96 virtual bool is_colon_equiv (octave_idx_type) const
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97 { return false; }
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98
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99 // The original dimensions of this object (used when subscribing by matrices).
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100 virtual dim_vector orig_dimensions (void) const
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101 { return dim_vector (); }
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102
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103 // i/o
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104 virtual std::ostream& print (std::ostream& os) const = 0;
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105
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106 int count;
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107
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108 bool err;
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109
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110 private:
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111
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112 // No copying!
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113 idx_base_rep (const idx_base_rep&);
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114 };
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115
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116 // The magic colon index.
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117 class OCTAVE_API idx_colon_rep : public idx_base_rep
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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
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125 { return i; }
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126
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127 octave_idx_type checkelem (octave_idx_type i) const;
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128
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129 octave_idx_type length (octave_idx_type n) const
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130 { return n; }
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131
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132 octave_idx_type extent (octave_idx_type n) const
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133 { return n; }
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134
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135 idx_class_type idx_class (void) const { return class_colon; }
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136
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137 idx_base_rep *sort_uniq_clone (bool = false)
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138 { count++; return this; }
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139
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140 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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141
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142 bool is_colon_equiv (octave_idx_type) const
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143 { return true; }
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144
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145 std::ostream& print (std::ostream& os) const;
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146
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147 private:
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148
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149 DECLARE_OCTAVE_ALLOCATOR
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150
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151 // No copying!
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152 idx_colon_rep (const idx_colon_rep& idx);
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153 };
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154
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155 // To distinguish the "direct" constructors that blindly trust the data.
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156 enum direct { DIRECT };
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157
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158 // The integer range index.
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159 class OCTAVE_API idx_range_rep : public idx_base_rep
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160 {
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161 public:
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162 idx_range_rep (octave_idx_type _start, octave_idx_type _len,
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163 octave_idx_type _step, direct)
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164 : idx_base_rep (), start(_start), len(_len), step(_step) { }
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165
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166 idx_range_rep (void)
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167 : start(0), len(0), step(1) { }
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168
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169 // Zero-based constructor.
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170 idx_range_rep (octave_idx_type _start, octave_idx_type _limit,
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171 octave_idx_type _step);
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172
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173 idx_range_rep (const Range&);
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174
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175 octave_idx_type xelem (octave_idx_type i) const
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176 { return start + i * step; }
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177
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178 octave_idx_type checkelem (octave_idx_type i) const;
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179
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180 octave_idx_type length (octave_idx_type) const
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181 { return len; }
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182
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183 octave_idx_type extent (octave_idx_type n) const
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184 { return len ? std::max (n, (start + 1 + (step < 0 ? 0 : step * (len - 1)))) : n; }
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185
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186 idx_class_type idx_class (void) const { return class_range; }
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187
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188 idx_base_rep *sort_uniq_clone (bool uniq = false);
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189
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190 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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191
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192 bool is_colon_equiv (octave_idx_type n) const
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193 { return start == 0 && step == 1 && len == n; }
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194
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195 dim_vector orig_dimensions (void) const
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196 { return dim_vector (1, len); }
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197
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198 octave_idx_type get_start (void) const { return start; }
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199
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200 octave_idx_type get_step (void) const { return step; }
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201
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202 std::ostream& print (std::ostream& os) const;
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203
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204 Range unconvert (void) const;
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205
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206 private:
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207
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208 DECLARE_OCTAVE_ALLOCATOR
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209
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210 // No copying!
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211 idx_range_rep (const idx_range_rep& idx);
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212
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213 octave_idx_type start, len, step;
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214
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215 };
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216
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217 // The integer scalar index.
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218 class OCTAVE_API idx_scalar_rep : public idx_base_rep
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219 {
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220 public:
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221 idx_scalar_rep (octave_idx_type i, direct)
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222 : data (i) { }
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223
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224 idx_scalar_rep (void)
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225 : data (0) { }
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226
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227 // Zero-based constructor.
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228 idx_scalar_rep (octave_idx_type i);
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229
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230 template <class T>
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231 idx_scalar_rep (T x);
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232
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233 octave_idx_type xelem (octave_idx_type) const
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234 { return data; }
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235
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236 octave_idx_type checkelem (octave_idx_type i) const;
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237
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238 octave_idx_type length (octave_idx_type) const
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239 { return 1; }
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240
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241 octave_idx_type extent (octave_idx_type n) const
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242 { return std::max (n, data + 1); }
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243
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244 idx_class_type idx_class (void) const { return class_scalar; }
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245
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246 idx_base_rep *sort_uniq_clone (bool = false)
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247 { count++; return this; }
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248
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249 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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250
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251 bool is_colon_equiv (octave_idx_type n) const
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252 { return n == 1 && data == 0; }
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253
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254 dim_vector orig_dimensions (void) const
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255 { return dim_vector (1, 1); }
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256
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257 octave_idx_type get_data (void) const { return data; }
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258
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259 std::ostream& print (std::ostream& os) const;
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260
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261 double unconvert (void) const;
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262
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263 private:
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264
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265 DECLARE_OCTAVE_ALLOCATOR
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266
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267 // No copying!
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268 idx_scalar_rep (const idx_scalar_rep& idx);
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269
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270 octave_idx_type data;
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271
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272 };
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273
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274 // The integer vector index.
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275 class OCTAVE_API idx_vector_rep : public idx_base_rep
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276 {
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277 public:
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278 // Direct constructor.
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279 idx_vector_rep (octave_idx_type *_data, octave_idx_type _len,
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280 octave_idx_type _ext, const dim_vector& od, direct)
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281 : data (_data), len (_len), ext (_ext), aowner (0), orig_dims (od) { }
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282
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283 idx_vector_rep (void)
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284 : data (0), len (0), aowner (0)
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285 { }
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286
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287 // Zero-based constructor.
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288 idx_vector_rep (const Array<octave_idx_type>& inda);
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289
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290 idx_vector_rep (const Array<octave_idx_type>& inda,
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291 octave_idx_type _ext, direct);
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292
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293 template <class T>
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294 idx_vector_rep (const Array<T>&);
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295
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296 idx_vector_rep (bool);
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297
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298 idx_vector_rep (const Array<bool>&, octave_idx_type = -1);
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299
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300 idx_vector_rep (const Sparse<bool>&);
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301
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302 ~idx_vector_rep (void);
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303
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304 octave_idx_type xelem (octave_idx_type i) const
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305 { return data[i]; }
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306
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307 octave_idx_type checkelem (octave_idx_type i) const;
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308
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309 octave_idx_type length (octave_idx_type) const
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310 { return len; }
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311
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312 octave_idx_type extent (octave_idx_type n) const
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313 { return std::max (n, ext); }
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314
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315 idx_class_type idx_class (void) const { return class_vector; }
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316
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317 idx_base_rep *sort_uniq_clone (bool uniq = false);
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318
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319 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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320
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321 dim_vector orig_dimensions (void) const
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322 { return orig_dims; }
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323
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324 const octave_idx_type *get_data (void) const { return data; }
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325
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326 std::ostream& print (std::ostream& os) const;
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327
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328 Array<double> unconvert (void) const;
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329
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330 private:
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331
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332 DECLARE_OCTAVE_ALLOCATOR
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333
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334 // No copying!
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335 idx_vector_rep (const idx_vector_rep& idx);
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336
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337 const octave_idx_type *data;
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338 octave_idx_type len, 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 as indices
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341 // without copying. If the following pointer is nonzero, we do not own the data,
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342 // but rather have an Array<octave_idx_type> object that provides us the data.
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343 // Note that we need a pointer because we deferred the Array<T> declaration and
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344 // we do not want it yet to be defined.
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345
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346 Array<octave_idx_type> *aowner;
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347
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348 dim_vector orig_dims;
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349 };
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350
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351 // The logical mask index.
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352 class OCTAVE_API idx_mask_rep : public idx_base_rep
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353 {
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354 public:
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355 // Direct constructor.
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356 idx_mask_rep (bool *_data, octave_idx_type _len,
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357 octave_idx_type _ext, const dim_vector& od, direct)
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358 : data (_data), len (_len), ext (_ext), aowner (0), orig_dims (od) { }
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359
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360 idx_mask_rep (void)
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361 : data (0), len (0), aowner (0)
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362 { }
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363
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364 idx_mask_rep (bool);
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365
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366 idx_mask_rep (const Array<bool>&, octave_idx_type = -1);
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367
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368 ~idx_mask_rep (void);
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369
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370 octave_idx_type xelem (octave_idx_type i) const;
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371
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372 octave_idx_type checkelem (octave_idx_type i) const;
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373
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374 octave_idx_type length (octave_idx_type) const
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375 { return len; }
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376
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377 octave_idx_type extent (octave_idx_type n) const
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378 { return std::max (n, ext); }
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379
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380 idx_class_type idx_class (void) const { return class_mask; }
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381
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382 idx_base_rep *sort_uniq_clone (bool = false)
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383 { count++; return this; }
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384
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385 idx_base_rep *sort_idx (Array<octave_idx_type>&);
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386
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387 dim_vector orig_dimensions (void) const
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388 { return orig_dims; }
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389
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390 bool is_colon_equiv (octave_idx_type n) const
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391 { return len == n && ext == n; }
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392
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393 const bool *get_data (void) const { return data; }
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394
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395 std::ostream& print (std::ostream& os) const;
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396
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397 Array<bool> unconvert (void) const;
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398
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399 private:
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400
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401 DECLARE_OCTAVE_ALLOCATOR
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402
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403 // No copying!
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404 idx_mask_rep (const idx_mask_rep& idx);
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405
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406 const bool *data;
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407 octave_idx_type len, ext;
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408
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409 // FIXME: I'm not sure if this is a good design. Maybe it would be better to
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410 // employ some sort of generalized iteration scheme.
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411 mutable octave_idx_type lsti, lste;
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412
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413 // This is a trick to allow user-given mask arrays to be used as indices
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414 // without copying. If the following pointer is nonzero, we do not own the data,
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415 // but rather have an Array<bool> object that provides us the data.
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416 // Note that we need a pointer because we deferred the Array<T> declaration and
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417 // we do not want it yet to be defined.
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418
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419 Array<bool> *aowner;
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420
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421 dim_vector orig_dims;
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422 };
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423
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424 idx_vector (idx_base_rep *r) : rep (r) { }
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425
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426 // The shared empty vector representation (for fast default constructor)
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427 static idx_vector_rep *nil_rep (void)
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428 {
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429 static idx_vector_rep ivr;
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430 return &ivr;
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431 }
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432
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433 // The shared empty vector representation with the error flag set.
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434 static idx_vector_rep *err_rep (void)
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435 {
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436 static idx_vector_rep ivr;
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437 ivr.err = true;
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438 return &ivr;
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439 }
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440
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441 // If there was an error in constructing the rep, replace it with empty vector
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442 // for safety.
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443 void chkerr (void)
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444 {
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445 if (rep->err)
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446 {
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447 if (--rep->count == 0)
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448 delete rep;
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449 rep = err_rep ();
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450 rep->count++;
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451 }
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452 }
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453
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454 public:
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455
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456 // Fast empty constructor.
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457 idx_vector (void) : rep (nil_rep ()) { rep->count++; }
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458
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459 // Zero-based constructors (for use from C++).
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460 idx_vector (octave_idx_type i) : rep (new idx_scalar_rep (i))
7cbe01c21986 improve dense array indexing
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461 { chkerr (); }
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diff changeset
462
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diff changeset
463 idx_vector (octave_idx_type start, octave_idx_type limit,
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diff changeset
464 octave_idx_type step = 1)
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465 : rep (new idx_range_rep (start, limit, step))
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diff changeset
466 { chkerr (); }
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diff changeset
467
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diff changeset
468 static idx_vector
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diff changeset
469 make_range (octave_idx_type start, octave_idx_type step,
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diff changeset
470 octave_idx_type len)
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471 {
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diff changeset
472 return idx_vector (new idx_range_rep (start, len, step, DIRECT));
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diff changeset
473 }
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diff changeset
474
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diff changeset
475 idx_vector (const Array<octave_idx_type>& inda)
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476 : rep (new idx_vector_rep (inda))
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diff changeset
477 { chkerr (); }
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diff changeset
478
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479 // Directly pass extent, no checking.
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480 idx_vector (const Array<octave_idx_type>& inda, octave_idx_type ext)
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481 : rep (new idx_vector_rep (inda, ext, DIRECT))
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482 { }
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483
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484 // Colon is best constructed by simply copying (or referencing) this member.
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diff changeset
485 static const idx_vector colon;
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486
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487 // or passing ':' here
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diff changeset
488 idx_vector (char c) : rep (new idx_colon_rep (c)) { chkerr (); }
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diff changeset
489
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diff changeset
490 // Conversion constructors (used by interpreter).
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491
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492 template <class T>
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493 idx_vector (octave_int<T> x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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494
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495 idx_vector (double x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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496
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497 idx_vector (float x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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498
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499 // A scalar bool does not necessarily map to scalar index.
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500 idx_vector (bool x) : rep (new idx_mask_rep (x)) { chkerr (); }
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501
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502 template <class T>
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diff changeset
503 idx_vector (const Array<octave_int<T> >& nda) : rep (new idx_vector_rep (nda))
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504 { chkerr (); }
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505
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diff changeset
506 idx_vector (const Array<double>& nda) : rep (new idx_vector_rep (nda))
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507 { chkerr (); }
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508
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509 idx_vector (const Array<float>& nda) : rep (new idx_vector_rep (nda))
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510 { chkerr (); }
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511
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512 idx_vector (const Array<bool>& nda);
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513
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514 idx_vector (const Range& r)
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515 : rep (new idx_range_rep (r))
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516 { chkerr (); }
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517
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518 idx_vector (const Sparse<bool>& nda) : rep (new idx_vector_rep (nda))
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519 { chkerr (); }
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diff changeset
520
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521 idx_vector (const idx_vector& a) : rep (a.rep) { rep->count++; }
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522
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diff changeset
523 ~idx_vector (void)
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524 {
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525 if (--rep->count == 0)
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diff changeset
526 delete rep;
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527 }
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528
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529 idx_vector& operator = (const idx_vector& a)
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530 {
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531 if (this != &a)
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532 {
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533 if (--rep->count == 0)
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534 delete rep;
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535
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536 rep = a.rep;
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537 rep->count++;
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538 }
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diff changeset
539 return *this;
1551
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diff changeset
540 }
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diff changeset
541
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542 idx_class_type idx_class (void) const { return rep->idx_class (); }
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diff changeset
543
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544 octave_idx_type length (octave_idx_type n = 0) const
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diff changeset
545 { return rep->length (n); }
191
b6b4d8c513fe [project @ 1993-10-29 23:41:39 by jwe]
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diff changeset
546
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547 octave_idx_type extent (octave_idx_type n) const
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diff changeset
548 { return rep->extent (n); }
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549
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550 octave_idx_type xelem (octave_idx_type n) const
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551 { return rep->xelem (n); }
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diff changeset
552
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553 octave_idx_type checkelem (octave_idx_type n) const
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diff changeset
554 { return rep->checkelem (n); }
1551
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diff changeset
555
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556 octave_idx_type operator () (octave_idx_type n) const
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diff changeset
557 {
7cbe01c21986 improve dense array indexing
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558 #if defined (BOUNDS_CHECKING)
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559 return rep->checkelem (n);
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diff changeset
560 #else
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561 return rep->xelem (n);
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diff changeset
562 #endif
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563 }
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564
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diff changeset
565 operator bool (void) const
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diff changeset
566 { return ! rep->err; }
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diff changeset
567
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diff changeset
568 bool is_colon (void) const
7cbe01c21986 improve dense array indexing
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diff changeset
569 { return rep->idx_class () == class_colon; }
7cbe01c21986 improve dense array indexing
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diff changeset
570
7cbe01c21986 improve dense array indexing
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diff changeset
571 bool is_scalar (void) const
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diff changeset
572 { return rep->idx_class () == class_scalar; }
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573
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diff changeset
574 bool is_range (void) const
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575 { return rep->idx_class () == class_range; }
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576
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diff changeset
577 bool is_colon_equiv (octave_idx_type n) const
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diff changeset
578 { return rep->is_colon_equiv (n); }
3079
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parents: 2847
diff changeset
579
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diff changeset
580 idx_vector sorted (bool uniq = false) const
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diff changeset
581 { return idx_vector (rep->sort_uniq_clone (uniq)); }
208
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parents: 191
diff changeset
582
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parents: 10158
diff changeset
583 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
584 { return idx_vector (rep->sort_idx (sidx)); }
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parents: 10158
diff changeset
585
4653
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parents: 4650
diff changeset
586 dim_vector orig_dimensions (void) const { return rep->orig_dimensions (); }
4504
f6a61399bc5c [project @ 2003-09-09 17:48:00 by jwe]
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parents: 4461
diff changeset
587
8333
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diff changeset
588 octave_idx_type orig_rows (void) const
8290
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diff changeset
589 { return orig_dimensions () (0); }
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diff changeset
590
8333
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diff changeset
591 octave_idx_type orig_columns (void) const
8290
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diff changeset
592 { return orig_dimensions () (1); }
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parents: 7573
diff changeset
593
2663
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parents: 2386
diff changeset
594 int orig_empty (void) const
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
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parents: 4650
diff changeset
595 { return (! is_colon () && orig_dimensions().any_zero ()); }
2663
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diff changeset
596
4653
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diff changeset
597 // i/o
1
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diff changeset
598
3504
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parents: 3503
diff changeset
599 std::ostream& print (std::ostream& os) const { return rep->print (os); }
1560
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parents: 1553
diff changeset
600
3504
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parents: 3503
diff changeset
601 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
602 { return a.print (os); }
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
jwe
parents: 1553
diff changeset
603
8290
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diff changeset
604 // Slice with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
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diff changeset
605 //
7cbe01c21986 improve dense array indexing
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diff changeset
606 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff changeset
607 //
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
608 // 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
609 // dest[i] = src[idx(i)];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
610 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
611 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
612 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
613 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
614 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
615 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
616 octave_idx_type len = rep->length (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
617 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
618 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
619 case class_colon:
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
620 copy_or_memcpy (len, src, dest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
621 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
622 case class_range:
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 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
625 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
626 const T *ssrc = src + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
627 if (step == 1)
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
628 copy_or_memcpy (len, ssrc, dest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
629 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
630 std::reverse_copy (ssrc - len + 1, ssrc + 1, dest);
8972
5fa53d1b6247 more indexing optimizations
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
631 else if (step == 0)
5fa53d1b6247 more indexing optimizations
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
632 std::fill_n (dest, len, *ssrc);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
633 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
634 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
635 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
636 dest[i] = ssrc[j];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
637 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
638 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
639 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
640 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
641 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
642 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
643 dest[0] = src[r->get_data ()];
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 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
646 case class_vector:
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 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
649 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
650 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
651 dest[i] = src[data[i]];
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 break;
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
654 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
655 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
656 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
657 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
658 octave_idx_type ext = r->extent (0);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
659 for (octave_idx_type i = 0; i < ext; i++)
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
660 if (data[i]) *dest++ = src[i];
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
661 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
662 break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
663 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
664 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
665 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
666 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
667
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
668 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
669 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
670
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
671 // Slice assignment with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
672 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
673 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
674 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
675 // 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
676 // dest[idx(i)] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
677 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
678 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
679 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
680 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
681 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
682 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
683 octave_idx_type len = rep->length (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
684 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
685 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
686 case class_colon:
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
687 copy_or_memcpy (len, src, dest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
688 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
689 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
690 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
691 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
692 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
693 T *sdest = dest + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
694 if (step == 1)
9780
6dafc60dde31 rename oct-mem functions
Jaroslav Hajek <highegg@gmail.com>
parents: 9773
diff changeset
695 copy_or_memcpy (len, src, sdest);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
696 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
697 std::reverse_copy (src, src + len, sdest - len + 1);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
698 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
699 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
700 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
701 sdest[j] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
702 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
703 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
704 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
705 case class_scalar:
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_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
708 dest[r->get_data ()] = src[0];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
709 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
710 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
711 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
712 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
713 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
714 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
715 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
716 dest[data[i]] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
717 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
718 break;
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
719 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
720 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
721 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
722 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
723 octave_idx_type ext = r->extent (0);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
724 for (octave_idx_type i = 0; i < ext; i++)
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
725 if (data[i]) dest[i] = *src++;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
726 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
727 break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
728 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
729 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
730 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
731 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
732
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
733 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
734 }
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 // Slice fill with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
737 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
738 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
739 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
740 // 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
741 // dest[idx(i)] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
742 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
743 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
744 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
745 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
746 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
747 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
748 octave_idx_type len = rep->length (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
749 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
750 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
751 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
752 std::fill (dest, dest + len, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
753 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
754 case class_range:
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 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
757 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
758 T *sdest = dest + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
759 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
760 std::fill (sdest, sdest + len, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
761 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
762 std::fill (sdest - len + 1, sdest + 1, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
763 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
764 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
765 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
766 sdest[j] = val;
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 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
769 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
770 case class_scalar:
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 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
773 dest[r->get_data ()] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
774 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
775 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
776 case class_vector:
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_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
779 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
780 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
781 dest[data[i]] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
782 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
783 break;
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
784 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
785 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
786 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
787 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
788 octave_idx_type ext = r->extent (0);
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
789 for (octave_idx_type i = 0; i < ext; i++)
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
790 if (data[i]) dest[i] = val;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
791 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
792 break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
793 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
794 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
795 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
796 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
797
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
798 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
799 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
800
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
801 // Generic non-breakable indexed loop. The loop body should be encapsulated in a
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
802 // single functor body.
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
803 // This is equivalent to the following loop (but faster, at least for simple
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
804 // inlined bodies):
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
805 //
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
806 // 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
807 //
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
808
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
809 template <class Functor>
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
810 void
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
811 loop (octave_idx_type n, Functor body) const
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
812 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
813 octave_idx_type len = rep->length (n);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
814 switch (rep->idx_class ())
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
815 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
816 case class_colon:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
817 for (octave_idx_type i = 0; i < len; i++) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
818 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
819 case class_range:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
820 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
821 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
822 octave_idx_type start = r->get_start (), step = r->get_step ();
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
823 octave_idx_type i, j;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
824 if (step == 1)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
825 for (i = start, j = start + len; i < j; i++) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
826 else if (step == -1)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
827 for (i = start, j = start - len; i > j; i--) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
828 else
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
829 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
830 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
831 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
832 case class_scalar:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
833 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
834 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
835 body (r->get_data ());
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 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
838 case class_vector:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
839 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
840 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
841 const octave_idx_type *data = r->get_data ();
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
842 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
843 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
844 break;
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
845 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
846 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
847 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
848 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
849 octave_idx_type ext = r->extent (0);
9985
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
850 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
851 if (data[i]) body (i);
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
852 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
853 break;
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
854 default:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
855 assert (false);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
856 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
857 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
858
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
859 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
860
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
861 // Generic breakable indexed loop. The loop body should be encapsulated in a
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
862 // single functor body.
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
863 // This is equivalent to the following loop (but faster, at least for simple
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
864 // inlined bodies):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
865 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
866 // 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
867 // if (body (idx(i))) break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
868 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
869 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
870
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
871 template <class Functor>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
872 octave_idx_type
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
873 bloop (octave_idx_type n, Functor body) const
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
874 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
875 octave_idx_type len = rep->length (n), ret;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
876 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
877 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
878 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
879 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
880 octave_idx_type i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
881 for (i = 0; i < len && body (i); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
882 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
883 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
884 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
885 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
886 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
887 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
888 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
889 octave_idx_type i, j;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
890 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
891 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
892 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
893 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
894 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
895 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
896 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
897 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
898 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
899 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
900 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
901 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
902 ret = body (r->get_data ()) ? 1 : 0;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
903 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
904 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
905 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
906 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
907 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
908 const octave_idx_type *data = r->get_data ();
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
909 octave_idx_type i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
910 for (i = 0; i < len && body (data[i]); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
911 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
912 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
913 break;
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
914 case class_mask:
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
915 {
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
916 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
917 const bool *data = r->get_data ();
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
918 octave_idx_type ext = r->extent (0), j = 0;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
919 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
920 {
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
921 if (data[i])
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
922 {
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
923 if (body (i))
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
924 break;
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
925 else
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
926 j++;
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
927 }
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
928 }
43a29eeda994 fix idx_vector::loop for masks
Jaroslav Hajek <highegg@gmail.com>
parents: 9894
diff changeset
929
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
930 ret = j;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
931 }
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
932 break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
933 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
934 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
935 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
936 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
937
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
938 return ret;
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
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
941 // Rationale:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
942 // This method is the key to "smart indexing". When indexing cartesian
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
943 // arrays, sometimes consecutive index vectors can be reduced into a single
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
944 // index. If rows (A) = k and i.maybe_reduce (j) gives k, then A(i,j)(:) is
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
945 // equal to A(k)(:).
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
946
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
947 // 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
948 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
949 octave_idx_type nj);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
950
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
951 bool is_cont_range (octave_idx_type n,
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
952 octave_idx_type& l, octave_idx_type& u) const;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
953
9725
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
954 // 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
955 // vectors, 1st difference otherwise.
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
956 octave_idx_type increment (void) const;
aea3a3a950e1 implement nth_element
Jaroslav Hajek <highegg@gmail.com>
parents: 9601
diff changeset
957
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
958 idx_vector
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
959 complement (octave_idx_type n) const;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
960
8367
445d27d79f4e support permutation matrix objects
Jaroslav Hajek <highegg@gmail.com>
parents: 8333
diff changeset
961 bool is_permutation (octave_idx_type n) const;
445d27d79f4e support permutation matrix objects
Jaroslav Hajek <highegg@gmail.com>
parents: 8333
diff changeset
962
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
963 // 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
964 void copy_data (octave_idx_type *data) const;
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
965
9879
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
966 // 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
967 idx_vector unmask (void) const;
034677ab6865 smarter treatment of mask indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 9780
diff changeset
968
9894
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9886
diff changeset
969 // 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
970 void unconvert (idx_class_type& iclass,
9894
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9886
diff changeset
971 double& scalar, Range& range,
83bd7f34f9da improve idx_vector->octave_value conversion
Jaroslav Hajek <highegg@gmail.com>
parents: 9886
diff changeset
972 Array<double>& array, Array<bool>& mask) const;
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
973
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
974 // FIXME -- these are here for compatibility. They should be removed
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
975 // when no longer in use.
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
976
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
977 octave_idx_type elem (octave_idx_type n) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
978 { return (*this) (n); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
979
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
980 bool is_colon_equiv (octave_idx_type n, int) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
981 { return is_colon_equiv (n); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
982
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
983 octave_idx_type
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
984 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
985
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
986 void sort (bool uniq = false)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
987 { *this = sorted (uniq); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
988
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
989 octave_idx_type ones_count (void) const;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
990
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
991 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
992
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
993 private:
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
994
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
995 idx_base_rep *rep;
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
996
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
997 };
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
998
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
999 #endif