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annotate liboctave/dim-vector.h @ 10418:6c19d6fcd7e5

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up to 7th-order dim_vector constructors
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 17 Mar 2010 08:46:46 +0100
parents 69ecfbffcf4f
children afe44ee90cbd
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1 /*
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2
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3 Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 John W. Eaton
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4 Copyirght (C) 2009 VZLU Prague
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #if !defined (octave_dim_vector_h)
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25 #define octave_dim_vector_h 1
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26
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27 #include <cassert>
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28 #include <limits>
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29
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30 #include <sstream>
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31 #include <string>
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32
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33 #include "lo-error.h"
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34
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35 // Rationale: This implementation is more tricky than Array, but the
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36 // big plus is that dim_vector requires only one allocation instead of
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37 // two. It is (slightly) patterned after GCC's basic_string
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38 // implementation. rep is a pointer to an array of memory, comprising
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39 // count, length, and the data:
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40 //
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41 // <count>
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42 // <ndims>
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43 // rep --> <dims[0]>
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44 // <dims[1]>
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45 // ...
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46 //
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47 // The inlines count(), ndims() recover this data from the rep. Note
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48 // that rep points to the beginning of dims to grant faster access
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49 // (reinterpret_cast is assumed to be an inexpensive operation).
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50
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51 class
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52 dim_vector
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53 {
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54 private:
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55
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56 octave_idx_type *rep;
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57
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58 octave_idx_type& ndims (void) const { return rep[-1]; }
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59
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60 octave_idx_type& count (void) const { return rep[-2]; }
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61
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62 // Construct a new rep with count = 1 and ndims given.
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63
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64 static octave_idx_type *newrep (int ndims)
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65 {
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66 octave_idx_type *r = new octave_idx_type[ndims + 2];
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67
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68 *r++ = 1;
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69 *r++ = ndims;
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70
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71 return r;
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72 }
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73
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74 // Clone this->rep.
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75
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76 octave_idx_type *clonerep (void)
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77 {
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78 int l = ndims ();
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79
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80 octave_idx_type *r = new octave_idx_type[l + 2];
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81
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82 *r++ = 1;
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83 *r++ = l;
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84
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85 for (int i = 0; i < l; i++)
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86 r[i] = rep[i];
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87
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88 return r;
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89 }
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90
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91 // Clone and resize this->rep to length n, filling by given value.
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92
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93 octave_idx_type *resizerep (int n, octave_idx_type fill_value)
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94 {
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95 int l = ndims ();
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96
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97 if (n < 2)
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98 n = 2;
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99
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100 octave_idx_type *r = new octave_idx_type[n + 2];
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101
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102 *r++ = 1;
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103 *r++ = n;
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104
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105 if (l > n)
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106 l = n;
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107
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108 int j;
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109 for (j = 0; j < l; j++)
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110 r[j] = rep[j];
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111 for (; j < n; j++)
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112 r[j] = fill_value;
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113
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114 return r;
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115 }
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116
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117 // Free the rep.
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118
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119 void freerep (void)
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120 {
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121 assert (count () == 0);
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122 delete [] (rep - 2);
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123 }
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124
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125 void make_unique (void)
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126 {
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127 if (count () > 1)
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128 {
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129 --count();
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130 rep = clonerep ();
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131 }
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132 }
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133
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134 public:
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135
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136 explicit dim_vector (octave_idx_type n) GCC_ATTR_DEPRECATED
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137 : rep (newrep (2))
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138 {
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139 rep[0] = n;
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140 rep[1] = 1;
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141 }
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142
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143 dim_vector (octave_idx_type r, octave_idx_type c)
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144 : rep (newrep (2))
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145 {
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146 rep[0] = r;
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147 rep[1] = c;
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148 }
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149
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150 dim_vector (octave_idx_type r, octave_idx_type c, octave_idx_type p)
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151 : rep (newrep (3))
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152 {
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153 rep[0] = r;
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154 rep[1] = c;
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155 rep[2] = p;
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156 }
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157
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158 dim_vector (octave_idx_type r, octave_idx_type c, octave_idx_type p,
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159 octave_idx_type q)
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160 : rep (newrep (4))
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161 {
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162 rep[0] = r;
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163 rep[1] = c;
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164 rep[2] = p;
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165 rep[3] = q;
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166 }
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167
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168 dim_vector (octave_idx_type r, octave_idx_type c, octave_idx_type p,
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169 octave_idx_type q, octave_idx_type s)
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170 : rep (newrep (5))
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171 {
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172 rep[0] = r;
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173 rep[1] = c;
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174 rep[2] = p;
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175 rep[3] = q;
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176 rep[4] = s;
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177 }
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178
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179 dim_vector (octave_idx_type r, octave_idx_type c, octave_idx_type p,
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180 octave_idx_type q, octave_idx_type s, octave_idx_type t)
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181 : rep (newrep (6))
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182 {
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183 rep[0] = r;
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184 rep[1] = c;
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185 rep[2] = p;
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186 rep[3] = q;
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187 rep[4] = s;
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188 rep[5] = t;
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189 }
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190
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191 dim_vector (octave_idx_type r, octave_idx_type c, octave_idx_type p,
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192 octave_idx_type q, octave_idx_type s, octave_idx_type t,
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193 octave_idx_type u)
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194 : rep (newrep (7))
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195 {
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196 rep[0] = r;
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197 rep[1] = c;
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198 rep[2] = p;
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199 rep[3] = q;
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200 rep[4] = s;
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201 rep[5] = t;
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202 rep[6] = u;
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203 }
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204
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205 dim_vector (const octave_idx_type *vec, size_t vec_size)
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206 : rep (newrep (vec_size))
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207 {
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208 for (size_t k = 0; k < vec_size; k++)
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209 rep[k] = vec[k];
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210 }
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211
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212 octave_idx_type& elem (int i)
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213 {
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214 #ifdef BOUNDS_CHECKING
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215 assert (i >= 0 && i < ndims ());
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216 #endif
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217 make_unique ();
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218 return rep[i];
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219 }
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220
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221 octave_idx_type elem (int i) const
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222 {
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223 #ifdef BOUNDS_CHECKING
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224 assert (i >= 0 && i < ndims ());
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225 #endif
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226 return rep[i];
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227 }
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228
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229 void chop_trailing_singletons (void)
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230 {
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231 int l = ndims ();
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232 if (l > 2 && rep[l-1] == 1)
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233 {
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234 make_unique ();
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235 do
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236 l--;
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237 while (l > 2 && rep[l-1] == 1);
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238 ndims () = l;
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239 }
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240 }
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241
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242 void chop_all_singletons (void)
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243 {
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244 make_unique ();
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245
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246 int j = 0;
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247 int l = ndims();
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248
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249 for (int i = 0; i < l; i++)
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250 {
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251 if (rep[i] != 1)
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252 rep[j++] = rep[i];
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253 }
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254
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255 if (j == 1)
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256 rep[1] = 1;
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257
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258 ndims () = j > 2 ? j : 2;
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259 }
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260
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261 private:
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262
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263 static octave_idx_type *nil_rep (void)
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264 {
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265 static dim_vector zv (0, 0);
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266 return zv.rep;
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267 }
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268
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269 explicit dim_vector (octave_idx_type *r)
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270 : rep (r) { }
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271
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272 public:
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273
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274 explicit dim_vector (void) : rep (nil_rep ()) { count()++; }
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275
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276 dim_vector (const dim_vector& dv) : rep (dv.rep) { count()++; }
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277
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278 static dim_vector alloc (int n)
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279 {
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280 return dim_vector (newrep (n < 2 ? 2 : n));
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281 }
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282
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283 dim_vector& operator = (const dim_vector& dv)
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284 {
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285 if (&dv != this)
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286 {
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287 if (--count() <= 0)
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288 freerep ();
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289
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290 rep = dv.rep;
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291 count()++;
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292 }
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293
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294 return *this;
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295 }
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296
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297 ~dim_vector (void)
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298 {
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299 if (--count() <= 0)
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300 freerep ();
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301 }
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302
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303 int length (void) const { return ndims (); }
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304
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305 octave_idx_type& operator () (int i) { return elem (i); }
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306
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307 octave_idx_type operator () (int i) const { return elem (i); }
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308
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309 void resize (int n, int fill_value = 0)
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310 {
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311 int len = length ();
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312
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313 if (n != len)
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314 {
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315 octave_idx_type *r = resizerep (n, fill_value);
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316
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diff changeset
317 if (--count() <= 0)
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diff changeset
318 freerep ();
4513
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319
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diff changeset
320 rep = r;
4548
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diff changeset
321 }
820323598f4f [project @ 2003-10-26 03:16:42 by jwe]
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diff changeset
322 }
4513
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323
4559
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diff changeset
324 std::string str (char sep = 'x') const
4548
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diff changeset
325 {
5765
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diff changeset
326 std::ostringstream buf;
4543
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327
4548
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328 for (int i = 0; i < length (); i++)
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parents: 4543
diff changeset
329 {
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330 buf << elem (i);
4543
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331
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332 if (i < length () - 1)
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333 buf << sep;
4548
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diff changeset
334 }
4543
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diff changeset
335
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diff changeset
336 std::string retval = buf.str ();
4543
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diff changeset
337
4548
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338 return retval;
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339 }
4543
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340
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
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diff changeset
341 bool all_zero (void) const
4548
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342 {
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343 bool retval = true;
4543
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diff changeset
344
4548
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345 for (int i = 0; i < length (); i++)
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346 {
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347 if (elem (i) != 0)
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348 {
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349 retval = false;
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350 break;
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351 }
4548
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352 }
4543
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diff changeset
353
4548
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354 return retval;
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parents: 4543
diff changeset
355 }
4559
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diff changeset
356
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357 bool zero_by_zero (void) const
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358 {
cddd5c3d5f04 fix & extend special-case optimizations for indexed assignment
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359 return length () == 2 && elem (0) == 0 && elem (1) == 0;
cddd5c3d5f04 fix & extend special-case optimizations for indexed assignment
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360 }
cddd5c3d5f04 fix & extend special-case optimizations for indexed assignment
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parents: 9840
diff changeset
361
4559
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diff changeset
362 bool any_zero (void) const
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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parents: 4548
diff changeset
363 {
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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parents: 4548
diff changeset
364 bool retval = false;
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
jwe
parents: 4548
diff changeset
365
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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366 for (int i = 0; i < length (); i++)
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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parents: 4548
diff changeset
367 {
10150
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368 if (elem (i) == 0)
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diff changeset
369 {
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370 retval = true;
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371 break;
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diff changeset
372 }
4559
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parents: 4548
diff changeset
373 }
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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parents: 4548
diff changeset
374
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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diff changeset
375 return retval;
802818bfac91 [project @ 2003-10-28 19:13:43 by jwe]
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parents: 4548
diff changeset
376 }
4567
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diff changeset
377
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diff changeset
378 int num_ones (void) const
4635
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diff changeset
379 {
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
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parents: 4567
diff changeset
380 int retval = 0;
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
jwe
parents: 4567
diff changeset
381
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
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parents: 4567
diff changeset
382 for (int i = 0; i < length (); i++)
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
jwe
parents: 4567
diff changeset
383 if (elem (i) == 1)
10150
3778ea95adea style fixes
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diff changeset
384 retval++;
4635
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
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parents: 4567
diff changeset
385
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
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diff changeset
386 return retval;
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
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parents: 4567
diff changeset
387 }
f2cd320cbf6e [project @ 2003-11-20 01:48:23 by jwe]
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parents: 4567
diff changeset
388
10150
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diff changeset
389 bool all_ones (void) const
4655
c8829691db47 [project @ 2003-11-24 21:24:37 by jwe]
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parents: 4635
diff changeset
390 {
c8829691db47 [project @ 2003-11-24 21:24:37 by jwe]
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parents: 4635
diff changeset
391 return (num_ones () == length ());
c8829691db47 [project @ 2003-11-24 21:24:37 by jwe]
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diff changeset
392 }
c8829691db47 [project @ 2003-11-24 21:24:37 by jwe]
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diff changeset
393
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394 // Return the number of elements that a matrix with this dimension
4567
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diff changeset
395 // vector would have, NOT the number of dimensions (elements in the
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
jwe
parents: 4565
diff changeset
396 // dimension vector).
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
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diff changeset
397
9027
9a46ba093db4 generalize dim_vector::numel
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diff changeset
398 octave_idx_type numel (int n = 0) const
4567
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
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diff changeset
399 {
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
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diff changeset
400 int n_dims = length ();
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
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parents: 4565
diff changeset
401
9027
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parents: 8950
diff changeset
402 octave_idx_type retval = 1;
4567
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
jwe
parents: 4565
diff changeset
403
9027
9a46ba093db4 generalize dim_vector::numel
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parents: 8950
diff changeset
404 for (int i = n; i < n_dims; i++)
4567
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
jwe
parents: 4565
diff changeset
405 retval *= elem (i);
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
jwe
parents: 4565
diff changeset
406
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
jwe
parents: 4565
diff changeset
407 return retval;
fc30061d01da [project @ 2003-10-29 20:11:15 by jwe]
jwe
parents: 4565
diff changeset
408 }
4673
6639c2574023 [project @ 2003-12-10 16:11:54 by jwe]
jwe
parents: 4655
diff changeset
409
9840
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
410 // The following function will throw a std::bad_alloc ()
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
411 // exception if the requested size is larger than can be indexed by
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
412 // octave_idx_type. This may be smaller than the actual amount of
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
413 // memory that can be safely allocated on a system. However, if we
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
414 // don't fail here, we can end up with a mysterious crash inside a
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
415 // function that is iterating over an array using octave_idx_type
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
416 // indices.
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
417
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
418 octave_idx_type safe_numel (void) const
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
419 {
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
420 octave_idx_type idx_max = std::numeric_limits<octave_idx_type>::max () - 1;
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
421 octave_idx_type n = 1;
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
422 int n_dims = length ();
10150
3778ea95adea style fixes
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parents: 10095
diff changeset
423
9840
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
424 for (int i = 0; i < n_dims; i++)
c0b54271904b improve safe numel() calculation for arrays
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parents: 9743
diff changeset
425 {
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
426 n *= rep[i];
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
427 if (rep[i] != 0)
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
428 idx_max /= rep[i];
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
429 if (idx_max <= 0)
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
430 throw std::bad_alloc ();
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
431 }
10150
3778ea95adea style fixes
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diff changeset
432
9840
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Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
433 return n;
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
434 }
c0b54271904b improve safe numel() calculation for arrays
Jaroslav Hajek <highegg@gmail.com>
parents: 9743
diff changeset
435
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
436 bool any_neg (void) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
437 {
10150
3778ea95adea style fixes
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parents: 10095
diff changeset
438 int n_dims = length ();
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
439 int i;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
440
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
441 for (i = 0; i < n_dims; i++)
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
442 if (elem (i) < 0)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
443 break;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
444
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
445 return i < n_dims;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
446 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
447
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
448 dim_vector squeeze (void) const
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
449 {
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
450 dim_vector new_dims = *this;
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
451
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
452 bool dims_changed = 1;
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
453
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
454 int k = 0;
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
455
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
456 for (int i = 0; i < length (); i++)
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
457 {
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
458 if (elem (i) == 1)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
459 dims_changed = true;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
460 else
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
461 new_dims(k++) = elem (i);
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
462 }
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
463
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
464 if (dims_changed)
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
465 {
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
466 if (k == 0)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
467 new_dims = dim_vector (1, 1);
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
468 else if (k == 1)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
469 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
470 // There is one non-singleton dimension, so we need
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
471 // to decide the correct orientation.
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
472
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
473 if (elem (0) == 1)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
474 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
475 // The original dimension vector had a leading
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
476 // singleton dimension.
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
477
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
478 octave_idx_type tmp = new_dims(0);
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
479
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
480 new_dims.resize (2);
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
481
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
482 new_dims(0) = 1;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
483 new_dims(1) = tmp;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
484 }
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
485 else
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
486 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
487 // The first element of the original dimension vector
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
488 // was not a singleton dimension.
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
489
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
490 new_dims.resize (2);
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
491
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
492 new_dims(1) = 1;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
493 }
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
494 }
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
495 else
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
496 new_dims.resize(k);
4735
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
497 }
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
498
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
499 return new_dims;
24c7bc6354ba [project @ 2004-02-05 17:26:28 by jwe]
jwe
parents: 4673
diff changeset
500 }
4915
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
501
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
502 bool concat (const dim_vector& dvb, int dim = 0)
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
503 {
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
504 if (all_zero ())
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
505 {
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
506 *this = dvb;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
507 return true;
4915
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
508 }
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
509
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
510 if (dvb.all_zero ())
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
511 return true;
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
512
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
513 int na = length ();
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
514 int nb = dvb.length ();
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
515
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
516 // Find the max and min value of na and nb
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
517 int n_max = na > nb ? na : nb;
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
518 int n_min = na < nb ? na : nb;
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
519
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
520 // The elements of the dimension vectors can only differ
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
521 // if the dim variable differs from the actual dimension
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
522 // they differ.
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
523
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
524 for (int i = 0; i < n_min; i++)
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
525 {
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
526 if (elem(i) != dvb(i) && dim != i)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
527 return false;
4915
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
528 }
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
529
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
530 // Ditto.
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
531 for (int i = n_min; i < n_max; i++)
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
532 {
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
533 if (na > n_min)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
534 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
535 if (elem(i) != 1 && dim != i)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
536 return false;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
537 }
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
538 else
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
539 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
540 if (dvb(i) != 1 && dim != i)
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
541 return false;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
542 }
4915
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
543 }
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
544
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
545 // If we want to add the dimension vectors at a dimension
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
546 // larger than both, then we need to set n_max to this number
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
547 // so that we resize *this to the right dimension.
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
548
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
549 n_max = n_max > (dim + 1) ? n_max : (dim + 1);
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
550
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
551 // Resize *this to the appropriate dimensions.
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
552
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
553 if (n_max > na)
9507
b096d11237be dim_vector improvements
Jaroslav Hajek <highegg@gmail.com>
parents: 9420
diff changeset
554 resize (n_max, 1);
4915
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
555
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
556 // Larger or equal since dim has been decremented by one.
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
557
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
558 if (dim >= nb)
4940
954cc2ba6a49 [project @ 2004-08-24 19:30:31 by jwe]
jwe
parents: 4915
diff changeset
559 elem (dim)++;
4915
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
560 else
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
561 elem (dim) += dvb(dim);
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
562
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
563 return true;
c638c144d4da [project @ 2004-07-23 19:01:22 by jwe]
jwe
parents: 4887
diff changeset
564 }
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
565
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
566 // Force certain dimensionality, preserving numel (). Missing
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
567 // dimensions are set to 1, redundant are folded into the trailing
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
568 // one. If n = 1, the result is 2d and the second dim is 1
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
569 // (dim_vectors are always at least 2D). If the original dimensions
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
570 // were all zero, the padding value is zero.
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
571
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
572 dim_vector redim (int n) const
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
573 {
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
574 int n_dims = length ();
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
575
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
576 if (n_dims == n)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
577 return *this;
9666
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
578 else if (n_dims < n)
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
579 {
9666
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
580 dim_vector retval = alloc (n);
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
581
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
582 int pad = 0;
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
583 for (int i = 0; i < n_dims; i++)
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
584 {
9666
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
585 retval.rep[i] = rep[i];
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
586 if (rep[i] != 0)
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
587 pad = 1;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
588 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
589
9666
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
590 for (int i = n_dims; i < n; i++)
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
591 retval.rep[i] = pad;
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
592
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
593 return retval;
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
594 }
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
595 else
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
596 {
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
597 if (n < 1) n = 1;
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
598
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
599 dim_vector retval = alloc (n);
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
600
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
601 retval.rep[1] = 1;
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
602
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
603 for (int i = 0; i < n-1; i++)
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
604 retval.rep[i] = rep[i];
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
605
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
606 int k = rep[n-1];
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
607 for (int i = n; i < n_dims; i++)
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
608 k *= rep[i];
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
609
a531dec450c4 allow 1D case for sub2ind and ind2sub
Jaroslav Hajek <highegg@gmail.com>
parents: 9648
diff changeset
610 retval.rep[n-1] = k;
8290
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
611
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
612 return retval;
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
613 }
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 7017
diff changeset
614 }
8721
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8290
diff changeset
615
10350
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
616 dim_vector as_column (void) const
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
617 {
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
618 if (length () == 2 && elem (1) == 1)
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
619 return *this;
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
620 else
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
621 return dim_vector (numel (), 1);
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
622 }
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
623
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
624 dim_vector as_row (void) const
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
625 {
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
626 if (length () == 2 && elem (0) == 1)
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
627 return *this;
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
628 else
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
629 return dim_vector (1, numel ());
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
630 }
12884915a8e4 merge MArray classes & improve Array interface
Jaroslav Hajek <highegg@gmail.com>
parents: 10150
diff changeset
631
8721
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8290
diff changeset
632 bool is_vector (void) const
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8290
diff changeset
633 {
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8290
diff changeset
634 return (length () == 2 && (elem (0) == 1 || elem (1) == 1));
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8290
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635 }
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8290
diff changeset
636
9511
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
637 int first_non_singleton (int def = 0) const
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
638 {
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
639 for (int i = 0; i < length (); i++)
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
640 {
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
641 if (elem (i) != 1)
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
642 return i;
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
643 }
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
644
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
645 return def;
cc1fd3084cb2 implement dim_vector::first_non_singleton
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parents: 9507
diff changeset
646 }
cc1fd3084cb2 implement dim_vector::first_non_singleton
Jaroslav Hajek <highegg@gmail.com>
parents: 9507
diff changeset
647
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3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
648 // Compute a linear index from an index tuple.
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
649
9739
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
650 octave_idx_type compute_index (const octave_idx_type *idx)
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
651 {
13b57eec9440 a few handy methods for dim_vector
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diff changeset
652 octave_idx_type k = 0;
9743
26abff55f6fe optimize bsxfun for common built-in operations
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parents: 9739
diff changeset
653 for (int i = length () - 1; i >= 0; i--)
9739
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
654 k = k * rep[i] + idx[i];
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
655
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parents: 9694
diff changeset
656 return k;
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parents: 9694
diff changeset
657 }
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
658
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
659 // Increment a multi-dimensional index tuple, optionally starting
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
660 // from an offset position and return the index of the last index
9739
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
661 // position that was changed, or length () if just cycled over.
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
662
9739
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
663 int increment_index (octave_idx_type *idx, int start = 0)
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
664 {
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
665 int i;
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
666 for (i = start; i < length (); i++)
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
667 {
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
668 if (++(*idx) == rep[i])
9743
26abff55f6fe optimize bsxfun for common built-in operations
Jaroslav Hajek <highegg@gmail.com>
parents: 9739
diff changeset
669 *idx++ = 0;
9739
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
670 else
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
671 break;
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parents: 9694
diff changeset
672 }
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
673 return i;
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
674 }
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
675
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
676 // Return cumulative dimensions.
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
677
9739
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
678 dim_vector cumulative (void) const
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
679 {
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
680 int nd = length ();
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
681 dim_vector retval = alloc (nd);
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
682
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
683 octave_idx_type k = 1;
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
684 for (int i = 0; i < nd; i++)
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
685 retval.rep[i] = k *= rep[i];
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
686
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
687 return retval;
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
688 }
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
689
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
690 // Compute a linear index from an index tuple. Dimensions are
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
691 // required to be cumulative.
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
692
9739
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
693 octave_idx_type cum_compute_index (const octave_idx_type *idx)
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
694 {
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
695 octave_idx_type k = idx[0];
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
696
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
697 for (int i = 1; i < length (); i++)
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
698 k += rep[i-1] * idx[i];
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
699
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
700 return k;
13b57eec9440 a few handy methods for dim_vector
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parents: 9694
diff changeset
701 }
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
702
13b57eec9440 a few handy methods for dim_vector
Jaroslav Hajek <highegg@gmail.com>
parents: 9694
diff changeset
703
9694
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
704 friend bool operator == (const dim_vector& a, const dim_vector& b);
4513
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
jwe
parents:
diff changeset
705 };
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
jwe
parents:
diff changeset
706
9694
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
707 inline bool
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
708 operator == (const dim_vector& a, const dim_vector& b)
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
709 {
9694
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
710 // Fast case.
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
711 if (a.rep == b.rep)
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
712 return true;
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
713
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
714 bool retval = true;
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
715
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
716 int a_len = a.length ();
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
717 int b_len = b.length ();
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
718
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
719 if (a_len != b_len)
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
720 retval = false;
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
721 else
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
722 {
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
723 for (int i = 0; i < a_len; i++)
10150
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
724 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
725 if (a(i) != b(i))
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
726 {
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
727 retval = false;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
728 break;
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
729 }
3778ea95adea style fixes
John W. Eaton <jwe@octave.org>
parents: 10095
diff changeset
730 }
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
731 }
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
732
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
733 return retval;
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
734 }
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
735
9694
50db3c5175b5 allow unpacked form of LU
Jaroslav Hajek <highegg@gmail.com>
parents: 9666
diff changeset
736 inline bool
4543
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
737 operator != (const dim_vector& a, const dim_vector& b)
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
738 {
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
739 return ! operator == (a, b);
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
740 }
79df15d4470c [project @ 2003-10-18 03:53:52 by jwe]
jwe
parents: 4532
diff changeset
741
4513
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
jwe
parents:
diff changeset
742 #endif