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annotate liboctave/idx-vector.h @ 9479:d9716e3ee0dd

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supply optimized compiled sub2ind & ind2sub
author Jaroslav Hajek <highegg@gmail.com>
date Mon, 03 Aug 2009 15:52:40 +0200
parents 5fa53d1b6247
children a9b37bae1802
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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
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7 This file is part of Octave.
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8
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9 Octave is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 3 of the License, or (at your
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12 option) any later version.
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13
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14 Octave is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with Octave; see the file COPYING. If not, see
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21 <http://www.gnu.org/licenses/>.
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23 */
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25 #if !defined (octave_idx_vector_h)
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26 #define octave_idx_vector_h 1
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27
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28 #include <cassert>
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29
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30 #include <algorithm>
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31 #include <iosfwd>
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32
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33 #include "dim-vector.h"
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34 #include "oct-inttypes.h"
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35 #include "oct-alloc.h"
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36
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37 template<class T> class Array;
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38 template<class T> class Sparse;
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39 class Range;
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40
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41 // Design rationale:
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42 // idx_vector is a reference-counting, polymorphic pointer, that can contain
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43 // 4 types of index objects: a magic colon, a range, a scalar, or an index vector.
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44 // Polymorphic methods for single element access are provided, as well as
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45 // templates implementing "early dispatch", i.e. hoisting the checks for index
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46 // type out of loops.
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48 class
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49 OCTAVE_API
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50 idx_vector
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51 {
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52 public:
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53
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54 enum idx_class_type
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55 {
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56 class_invalid = -1,
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57 class_colon = 0,
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58 class_range,
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59 class_scalar,
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60 class_vector
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61 };
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62
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63 private:
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64
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65 class OCTAVE_API idx_base_rep
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66 {
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67 public:
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68 idx_base_rep (void) : count (1), err (false) { }
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69
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70 virtual ~idx_base_rep (void) { }
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71
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72 // Non-range-checking element query.
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73 virtual octave_idx_type xelem (octave_idx_type i) const = 0;
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74
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75 // Range-checking element query.
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76 virtual octave_idx_type checkelem (octave_idx_type i) const = 0;
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77
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78 // Length of the index vector.
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79 virtual octave_idx_type length (octave_idx_type n) const = 0;
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80
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81 // The maximum index + 1. The actual dimension is passed in.
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82 virtual octave_idx_type extent (octave_idx_type n) const = 0;
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83
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84 // Index class.
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85 virtual idx_class_type idx_class (void) const { return class_invalid; }
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86
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87 // Sorts, maybe uniqifies, and returns a clone object pointer.
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88 virtual idx_base_rep *sort_uniq_clone (bool uniq = false) = 0;
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89
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90 // Checks whether the index is colon or a range equivalent to colon.
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91 virtual bool is_colon_equiv (octave_idx_type) const
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92 { return false; }
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93
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94 // The original dimensions of this object (used when subscribing by matrices).
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95 virtual dim_vector orig_dimensions (void) const
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96 { return dim_vector (); }
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97
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98 // i/o
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99 virtual std::ostream& print (std::ostream& os) const = 0;
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100
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101 int count;
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102
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103 bool err;
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104
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105 private:
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106
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107 // No copying!
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108 idx_base_rep (const idx_base_rep&);
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109 };
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110
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111 // The magic colon index.
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112 class OCTAVE_API idx_colon_rep : public idx_base_rep
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113 {
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114 public:
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115 idx_colon_rep (void) { }
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116
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117 idx_colon_rep (char c);
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118
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119 octave_idx_type xelem (octave_idx_type i) const
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120 { return i; }
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121
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122 octave_idx_type checkelem (octave_idx_type i) const;
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123
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124 octave_idx_type length (octave_idx_type n) const
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125 { return n; }
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126
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127 octave_idx_type extent (octave_idx_type n) const
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128 { return n; }
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129
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130 idx_class_type idx_class (void) const { return class_colon; }
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131
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132 idx_base_rep *sort_uniq_clone (bool = false)
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133 { count++; return this; }
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134
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135 bool is_colon_equiv (octave_idx_type) const
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136 { return true; }
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137
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138 std::ostream& print (std::ostream& os) const;
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139
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140 private:
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141
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142 DECLARE_OCTAVE_ALLOCATOR
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143
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144 // No copying!
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145 idx_colon_rep (const idx_colon_rep& idx);
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146 };
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147
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148 // To distinguish the "direct" constructors that blindly trust the data.
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149 enum direct { DIRECT };
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150
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151 // The integer range index.
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152 class OCTAVE_API idx_range_rep : public idx_base_rep
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153 {
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154 public:
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155 idx_range_rep (octave_idx_type _start, octave_idx_type _len,
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156 octave_idx_type _step, direct)
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157 : idx_base_rep (), start(_start), len(_len), step(_step) { }
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158
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159 idx_range_rep (void)
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160 : start(0), len(0), step(1) { }
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161
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162 // Zero-based constructor.
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163 idx_range_rep (octave_idx_type _start, octave_idx_type _limit,
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164 octave_idx_type _step);
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165
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166 idx_range_rep (const Range&);
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167
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168 octave_idx_type xelem (octave_idx_type i) const
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169 { return start + i * step; }
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170
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171 octave_idx_type checkelem (octave_idx_type i) const;
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172
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173 octave_idx_type length (octave_idx_type) const
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174 { return len; }
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175
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176 octave_idx_type extent (octave_idx_type n) const
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177 { return len ? std::max (n, (start + 1 + (step < 0 ? 0 : step * (len - 1)))) : n; }
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178
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179 idx_class_type idx_class (void) const { return class_range; }
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180
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181 idx_base_rep *sort_uniq_clone (bool uniq = false);
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182
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183 bool is_colon_equiv (octave_idx_type n) const
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184 { return start == 0 && step == 1 && len == n; }
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185
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186 dim_vector orig_dimensions (void) const
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187 { return dim_vector (1, len); }
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188
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189 octave_idx_type get_start (void) const { return start; }
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190
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191 octave_idx_type get_step (void) const { return step; }
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192
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193 std::ostream& print (std::ostream& os) const;
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194
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195 private:
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196
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197 DECLARE_OCTAVE_ALLOCATOR
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198
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199 // No copying!
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200 idx_range_rep (const idx_range_rep& idx);
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201
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202 octave_idx_type start, len, step;
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203
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204 };
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205
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206 // The integer scalar index.
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207 class OCTAVE_API idx_scalar_rep : public idx_base_rep
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208 {
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209 public:
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210 idx_scalar_rep (octave_idx_type i, direct)
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211 : data (i) { }
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212
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213 idx_scalar_rep (void)
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214 : data (0) { }
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215
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216 // Zero-based constructor.
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217 idx_scalar_rep (octave_idx_type i);
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218
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219 template <class T>
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220 idx_scalar_rep (T x);
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221
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222 octave_idx_type xelem (octave_idx_type) const
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223 { return data; }
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224
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225 octave_idx_type checkelem (octave_idx_type i) const;
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226
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227 octave_idx_type length (octave_idx_type) const
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228 { return 1; }
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229
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230 octave_idx_type extent (octave_idx_type n) const
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231 { return std::max (n, data + 1); }
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232
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233 idx_class_type idx_class (void) const { return class_scalar; }
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234
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235 idx_base_rep *sort_uniq_clone (bool = false)
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236 { count++; return this; }
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237
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238 bool is_colon_equiv (octave_idx_type n) const
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239 { return n == 1 && data == 0; }
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240
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241 dim_vector orig_dimensions (void) const
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242 { return dim_vector (1, 1); }
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243
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244 octave_idx_type get_data (void) const { return data; }
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245
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246 std::ostream& print (std::ostream& os) const;
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247
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248 private:
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249
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250 DECLARE_OCTAVE_ALLOCATOR
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251
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252 // No copying!
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253 idx_scalar_rep (const idx_scalar_rep& idx);
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254
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255 octave_idx_type data;
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256
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257 };
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258
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259 // The integer vector index.
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260 class OCTAVE_API idx_vector_rep : public idx_base_rep
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261 {
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262 public:
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263 // Direct constructor.
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264 idx_vector_rep (octave_idx_type *_data, octave_idx_type _len,
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265 octave_idx_type _ext, const dim_vector& od, direct)
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266 : data (_data), len (_len), ext (_ext), aowner (0), orig_dims (od) { }
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267
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268 idx_vector_rep (void)
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269 : data (0), len (0), aowner (0)
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270 { }
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271
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272 // Zero-based constructor.
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273 idx_vector_rep (const Array<octave_idx_type>& inda);
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274
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275 template <class T>
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276 idx_vector_rep (const Array<T>&);
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277
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278 idx_vector_rep (bool);
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279
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280 idx_vector_rep (const Array<bool>&);
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281
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282 idx_vector_rep (const Sparse<bool>&);
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283
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284 ~idx_vector_rep (void);
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285
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286 octave_idx_type xelem (octave_idx_type i) const
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287 { return data[i]; }
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288
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289 octave_idx_type checkelem (octave_idx_type i) const;
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290
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291 octave_idx_type length (octave_idx_type) const
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292 { return len; }
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293
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294 octave_idx_type extent (octave_idx_type n) const
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295 { return std::max (n, ext); }
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296
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297 idx_class_type idx_class (void) const { return class_vector; }
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298
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299 idx_base_rep *sort_uniq_clone (bool uniq = false);
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300
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301 dim_vector orig_dimensions (void) const
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302 { return orig_dims; }
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303
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304 const octave_idx_type *get_data (void) const { return data; }
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305
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306 std::ostream& print (std::ostream& os) const;
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307
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308 private:
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309
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310 DECLARE_OCTAVE_ALLOCATOR
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311
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312 // No copying!
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313 idx_vector_rep (const idx_vector_rep& idx);
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314
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315 const octave_idx_type *data;
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316 octave_idx_type len, ext;
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317
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318 // This is a trick to allow user-given zero-based arrays to be used as indices
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319 // without copying. If the following pointer is nonzero, we do not own the data,
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320 // but rather have an Array<octave_idx_type> object that provides us the data.
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321 // Note that we need a pointer because we deferred the Array<T> declaration and
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322 // we do not want it yet to be defined.
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323
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324 Array<octave_idx_type> *aowner;
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325
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326 dim_vector orig_dims;
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327 };
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328
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329
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330 idx_vector (idx_base_rep *r) : rep (r) { }
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331
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332 // The shared empty vector representation (for fast default constructor)
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333 static idx_vector_rep *nil_rep (void)
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334 {
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335 static idx_vector_rep ivr;
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336 return &ivr;
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337 }
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338
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339 // The shared empty vector representation with the error flag set.
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340 static idx_vector_rep *err_rep (void)
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341 {
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342 static idx_vector_rep ivr;
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343 ivr.err = true;
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344 return &ivr;
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345 }
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346
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347 // If there was an error in constructing the rep, replace it with empty vector
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348 // for safety.
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349 void chkerr (void)
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350 {
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351 if (rep->err)
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352 {
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353 if (--rep->count == 0)
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354 delete rep;
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355 rep = err_rep ();
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356 rep->count++;
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357 }
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358 }
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359
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360 public:
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361
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362 // Fast empty constructor.
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363 idx_vector (void) : rep (nil_rep ()) { rep->count++; }
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364
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365 // Zero-based constructors (for use from C++).
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366 idx_vector (octave_idx_type i) : rep (new idx_scalar_rep (i))
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367 { chkerr (); }
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368
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369 idx_vector (octave_idx_type start, octave_idx_type limit,
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370 octave_idx_type step = 1)
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371 : rep (new idx_range_rep (start, limit, step))
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372 { chkerr (); }
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373
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374 static idx_vector
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375 make_range (octave_idx_type start, octave_idx_type step,
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376 octave_idx_type len)
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377 {
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378 return idx_vector (new idx_range_rep (start, len, step, DIRECT));
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379 }
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380
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381 idx_vector (const Array<octave_idx_type>& inda)
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382 : rep (new idx_vector_rep (inda))
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383 { chkerr (); }
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384
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385 // Colon is best constructed by simply copying (or referencing) this member.
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386 static const idx_vector colon;
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387
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388 // or passing ':' here
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389 idx_vector (char c) : rep (new idx_colon_rep (c)) { chkerr (); }
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390
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391 // Conversion constructors (used by interpreter).
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392
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393 template <class T>
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394 idx_vector (octave_int<T> x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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395
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396 idx_vector (double x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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397
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398 idx_vector (float x) : rep (new idx_scalar_rep (x)) { chkerr (); }
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399
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400 // A scalar bool does not necessarily map to scalar index.
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401 idx_vector (bool x) : rep (new idx_vector_rep (x)) { chkerr (); }
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402
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403 template <class T>
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404 idx_vector (const Array<octave_int<T> >& nda) : rep (new idx_vector_rep (nda))
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405 { chkerr (); }
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406
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407 idx_vector (const Array<double>& nda) : rep (new idx_vector_rep (nda))
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408 { chkerr (); }
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409
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410 idx_vector (const Array<float>& nda) : rep (new idx_vector_rep (nda))
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411 { chkerr (); }
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412
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413 idx_vector (const Array<bool>& nda) : rep (new idx_vector_rep (nda))
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414 { chkerr (); }
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415
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416 idx_vector (const Range& r)
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417 : rep (new idx_range_rep (r))
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418 { chkerr (); }
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419
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420 idx_vector (const Sparse<bool>& nda) : rep (new idx_vector_rep (nda))
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421 { chkerr (); }
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422
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423 idx_vector (const idx_vector& a) : rep (a.rep) { rep->count++; }
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424
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425 ~idx_vector (void)
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426 {
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427 if (--rep->count == 0)
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428 delete rep;
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429 }
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430
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431 idx_vector& operator = (const idx_vector& a)
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432 {
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433 if (this != &a)
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434 {
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435 if (--rep->count == 0)
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436 delete rep;
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437
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438 rep = a.rep;
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439 rep->count++;
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440 }
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441 return *this;
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442 }
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443
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444 idx_class_type idx_class (void) const { return rep->idx_class (); }
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445
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446 octave_idx_type length (octave_idx_type n = 0) const
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447 { return rep->length (n); }
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448
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449 octave_idx_type extent (octave_idx_type n) const
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450 { return rep->extent (n); }
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451
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452 octave_idx_type xelem (octave_idx_type n) const
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453 { return rep->xelem (n); }
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454
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455 octave_idx_type checkelem (octave_idx_type n) const
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456 { return rep->checkelem (n); }
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457
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458 octave_idx_type operator () (octave_idx_type n) const
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459 {
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diff changeset
460 #if defined (BOUNDS_CHECKING)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
461 return rep->checkelem (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
462 #else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
463 return rep->xelem (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
464 #endif
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
465 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
466
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
467 operator bool (void) const
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
468 { return ! rep->err; }
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
469
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
470 bool is_colon (void) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
471 { return rep->idx_class () == class_colon; }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
472
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
473 bool is_scalar (void) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
474 { return rep->idx_class () == class_scalar; }
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
475
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
476 bool is_range (void) const
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
477 { return rep->idx_class () == class_range; }
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
478
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
479 bool is_colon_equiv (octave_idx_type n) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
480 { return rep->is_colon_equiv (n); }
3079
eb827eb9b8ff [project @ 1997-08-03 20:44:07 by jwe]
jwe
parents: 2847
diff changeset
481
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
482 idx_vector sorted (bool uniq = false) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
483 { return idx_vector (rep->sort_uniq_clone (uniq)); }
208
380cb9ccc889 [project @ 1993-11-12 10:35:05 by jwe]
jwe
parents: 191
diff changeset
484
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
jwe
parents: 4650
diff changeset
485 dim_vector orig_dimensions (void) const { return rep->orig_dimensions (); }
4504
f6a61399bc5c [project @ 2003-09-09 17:48:00 by jwe]
jwe
parents: 4461
diff changeset
486
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
487 octave_idx_type orig_rows (void) const
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
488 { return orig_dimensions () (0); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
489
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
490 octave_idx_type orig_columns (void) const
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
491 { return orig_dimensions () (1); }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
492
2663
00b2eff19bf5 [project @ 1997-02-08 21:58:49 by jwe]
jwe
parents: 2386
diff changeset
493 int orig_empty (void) const
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
jwe
parents: 4650
diff changeset
494 { return (! is_colon () && orig_dimensions().any_zero ()); }
2663
00b2eff19bf5 [project @ 1997-02-08 21:58:49 by jwe]
jwe
parents: 2386
diff changeset
495
4653
14ab7b05a572 [project @ 2003-11-24 05:02:46 by jwe]
jwe
parents: 4650
diff changeset
496 // i/o
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
497
3504
5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe]
jwe
parents: 3503
diff changeset
498 std::ostream& print (std::ostream& os) const { return rep->print (os); }
1560
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
jwe
parents: 1553
diff changeset
499
3504
5eef8a2294bd [project @ 2000-02-01 10:06:51 by jwe]
jwe
parents: 3503
diff changeset
500 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
501 { return a.print (os); }
27a03373de41 [project @ 1995-10-12 07:22:26 by jwe]
jwe
parents: 1553
diff changeset
502
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
503 // Slice with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
504 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
505 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
506 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
507 // 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
508 // dest[i] = src[idx(i)];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
509 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
510 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
511 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
512 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
513 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
514 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
515 octave_idx_type len = rep->length (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
516 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
517 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
518 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
519 std::copy (src, src + len, dest);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
520 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
521 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
522 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
523 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
524 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
525 const T *ssrc = src + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
526 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
527 std::copy (ssrc, ssrc + len, dest);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
528 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
529 std::reverse_copy (ssrc - len + 1, ssrc + 1, dest);
8972
5fa53d1b6247 more indexing optimizations
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
530 else if (step == 0)
5fa53d1b6247 more indexing optimizations
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
531 std::fill_n (dest, len, *ssrc);
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
532 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
533 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
534 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
535 dest[i] = ssrc[j];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
536 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
537 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
538 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
539 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
540 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
541 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
542 dest[0] = src[r->get_data ()];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
543 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
544 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
545 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
546 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
547 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
548 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
549 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
550 dest[i] = src[data[i]];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
551 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
552 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
553 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
554 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
555 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
556 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
557
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
558 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
559 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
560
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
561 // Slice assignment with specializations. No checking of bounds!
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
562 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
563 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
564 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
565 // 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
566 // dest[idx(i)] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
567 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
568 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
569 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
570 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
571 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
572 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
573 octave_idx_type len = rep->length (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
574 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
575 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
576 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
577 std::copy (src, src + len, dest);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
578 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
579 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
580 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
581 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
582 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
583 T *sdest = dest + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
584 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
585 std::copy (src, src + len, sdest);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
586 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
587 std::reverse_copy (src, src + len, sdest - len + 1);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
588 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
589 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
590 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
591 sdest[j] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
592 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
593 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
594 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
595 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
596 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
597 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
598 dest[r->get_data ()] = src[0];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
599 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
600 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
601 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
602 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
603 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
604 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
605 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
606 dest[data[i]] = src[i];
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
607 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
608 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
609 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
610 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
611 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
612 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
613
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
614 return len;
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
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
617 // Slice fill with specializations. No checking of bounds!
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 // This is equivalent to the following loop (but much faster):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
620 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
621 // 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
622 // dest[idx(i)] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
623 // return i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
624 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
625 template <class T>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
626 octave_idx_type
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
627 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
628 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
629 octave_idx_type len = rep->length (n);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
630 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
631 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
632 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
633 std::fill (dest, dest + len, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
634 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
635 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
636 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
637 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
638 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
639 T *sdest = dest + start;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
640 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
641 std::fill (sdest, sdest + len, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
642 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
643 std::fill (sdest - len + 1, sdest + 1, val);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
644 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
645 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
646 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
647 sdest[j] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
648 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
649 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
650 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
651 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
652 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
653 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
654 dest[r->get_data ()] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
655 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
656 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
657 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
658 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
659 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
660 const octave_idx_type *data = r->get_data ();
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
661 for (octave_idx_type i = 0; i < len; i++)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
662 dest[data[i]] = val;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
663 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
664 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
665 default:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
666 assert (false);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
667 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
668 }
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 return len;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
671 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
672
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
673 // 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
674 // single functor body.
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
675 // 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
676 // inlined bodies):
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
677 //
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
678 // 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
679 //
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
680
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
681 template <class Functor>
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
682 void
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
683 loop (octave_idx_type n, Functor body) const
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
684 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
685 octave_idx_type len = rep->length (n);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
686 switch (rep->idx_class ())
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
687 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
688 case class_colon:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
689 for (octave_idx_type i = 0; i < len; i++) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
690 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
691 case class_range:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
692 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
693 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
694 octave_idx_type start = r->get_start (), step = r->get_step ();
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
695 octave_idx_type i, j;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
696 if (step == 1)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
697 for (i = start, j = start + len; i < j; i++) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
698 else if (step == -1)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
699 for (i = start, j = start - len; i > j; i--) body (i);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
700 else
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
701 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
702 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
703 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
704 case class_scalar:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
705 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
706 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
707 body (r->get_data ());
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
708 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
709 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
710 case class_vector:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
711 {
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
712 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
713 const octave_idx_type *data = r->get_data ();
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
714 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
715 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
716 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
717 default:
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
718 assert (false);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
719 break;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
720 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
721
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
722 }
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
723
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
724 // 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
725 // single functor body.
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
726 // 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
727 // inlined bodies):
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
728 //
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
729 // 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
730 // if (body (idx(i))) break;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
731 // return i;
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
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
734 template <class Functor>
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
735 octave_idx_type
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
736 bloop (octave_idx_type n, Functor body) const
8290
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 octave_idx_type len = rep->length (n), ret;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
739 switch (rep->idx_class ())
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
740 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
741 case class_colon:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
742 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
743 octave_idx_type i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
744 for (i = 0; i < len && body (i); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
745 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
746 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
747 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
748 case class_range:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
749 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
750 idx_range_rep * r = dynamic_cast<idx_range_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
751 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
752 octave_idx_type i, j;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
753 if (step == 1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
754 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
755 else if (step == -1)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
756 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
757 else
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
758 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
759 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
760 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
761 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
762 case class_scalar:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
763 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
764 idx_scalar_rep * r = dynamic_cast<idx_scalar_rep *> (rep);
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
765 ret = body (r->get_data ()) ? 1 : 0;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
766 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
767 break;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
768 case class_vector:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
769 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
770 idx_vector_rep * r = dynamic_cast<idx_vector_rep *> (rep);
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
771 const octave_idx_type *data = r->get_data ();
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff changeset
772 octave_idx_type i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
773 for (i = 0; i < len && body (data[i]); i++) ;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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diff changeset
774 ret = i;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
775 }
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
776 break;
7cbe01c21986 improve dense array indexing
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diff changeset
777 default:
7cbe01c21986 improve dense array indexing
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diff changeset
778 assert (false);
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
779 break;
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
780 }
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
781
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
782 return ret;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
783 }
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
784
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
785 // Rationale:
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
786 // 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
787 // 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
788 // 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
789 // equal to A(k)(:).
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
790
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
791 // 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
792 bool maybe_reduce (octave_idx_type n, const idx_vector& j,
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
793 octave_idx_type nj);
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
794
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
795 bool is_cont_range (octave_idx_type n,
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
796 octave_idx_type& l, octave_idx_type& u) const;
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 idx_vector
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
799 complement (octave_idx_type n) const;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
800
8367
445d27d79f4e support permutation matrix objects
Jaroslav Hajek <highegg@gmail.com>
parents: 8333
diff changeset
801 bool is_permutation (octave_idx_type n) const;
445d27d79f4e support permutation matrix objects
Jaroslav Hajek <highegg@gmail.com>
parents: 8333
diff changeset
802
9479
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
803 // 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
804 void copy_data (octave_idx_type *data) const;
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
805
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
806 // Unconverts the index to a scalar, Range or double array.
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
807 void unconvert (idx_class_type& iclass,
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 8972
diff changeset
808 double& scalar, Range& range, Array<double>& array) const;
d9716e3ee0dd supply optimized compiled sub2ind & ind2sub
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parents: 8972
diff changeset
809
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
810 // FIXME -- these are here for compatibility. They should be removed
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
811 // when no longer in use.
8290
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diff changeset
812
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
813 octave_idx_type elem (octave_idx_type n) const
7cbe01c21986 improve dense array indexing
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diff changeset
814 { return (*this) (n); }
7cbe01c21986 improve dense array indexing
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diff changeset
815
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
816 bool is_colon_equiv (octave_idx_type n, int) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7573
diff changeset
817 { return is_colon_equiv (n); }
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
818
8333
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John W. Eaton <jwe@octave.org>
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diff changeset
819 octave_idx_type
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
820 freeze (octave_idx_type z_len, const char *tag, bool resize_ok = false);
8290
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diff changeset
821
7cbe01c21986 improve dense array indexing
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diff changeset
822 void sort (bool uniq = false)
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
823 { *this = sorted (uniq); }
7cbe01c21986 improve dense array indexing
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parents: 7573
diff changeset
824
8333
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8319
diff changeset
825 octave_idx_type ones_count (void) const;
8290
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diff changeset
826
8333
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parents: 8319
diff changeset
827 octave_idx_type max (void) const { return extent (1) - 1; }
8290
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diff changeset
828
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
829 private:
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
830
8290
7cbe01c21986 improve dense array indexing
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diff changeset
831 idx_base_rep *rep;
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
832
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
833 };
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
834
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
835 #endif
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
836
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
837 /*
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
838 ;;; Local Variables: ***
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
839 ;;; mode: C++ ***
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
840 ;;; End: ***
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
841 */