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annotate liboctave/Array.h @ 9653:e087d7c77ff9

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improve linspace in liboctave
author Jaroslav Hajek <highegg@gmail.com>
date Fri, 18 Sep 2009 15:27:09 +0200
parents 3fc7272937ce
children aea3a3a950e1
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1 // Template array classes
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2 /*
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3
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4 Copyright (C) 2008, 2009 Jaroslav Hajek
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5 Copyright (C) 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003,
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6 2004, 2005, 2006, 2007 John W. Eaton
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7
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8 This file is part of Octave.
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9
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10 Octave is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 3 of the License, or (at your
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13 option) any later version.
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14
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15 Octave is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with Octave; see the file COPYING. If not, see
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22 <http://www.gnu.org/licenses/>.
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23
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24 */
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25
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26 #if !defined (octave_Array_h)
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27 #define octave_Array_h 1
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28
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29 #include <cassert>
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30 #include <cstddef>
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31
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32 #include <algorithm>
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33 #include <iosfwd>
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34
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35 #include "dim-vector.h"
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36 #include "idx-vector.h"
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37 #include "lo-traits.h"
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38 #include "lo-utils.h"
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39 #include "oct-sort.h"
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40 #include "quit.h"
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41
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42 // One dimensional array class. Handles the reference counting for
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43 // all the derived classes.
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44
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45 template <class T>
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46 class
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47 Array
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48 {
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49 protected:
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50
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51 //--------------------------------------------------------------------
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52 // The real representation of all arrays.
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53 //--------------------------------------------------------------------
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54
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55 class ArrayRep
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56 {
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57 public:
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58
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59 T *data;
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60 octave_idx_type len;
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61 int count;
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62
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63 ArrayRep (T *d, octave_idx_type l, bool copy = false)
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64 : data (copy ? new T [l] : d), len (l), count (1)
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65 {
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66 if (copy)
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67 std::copy (d, d + l, data);
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68 }
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69
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70 ArrayRep (void) : data (0), len (0), count (1) { }
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71
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72 explicit ArrayRep (octave_idx_type n) : data (new T [n]), len (n), count (1) { }
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73
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74 explicit ArrayRep (octave_idx_type n, const T& val)
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75 : data (new T [n]), len (n), count (1)
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76 {
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77 std::fill (data, data + n, val);
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78 }
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79
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80 ArrayRep (const ArrayRep& a)
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81 : data (new T [a.len]), len (a.len), count (1)
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82 {
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83 std::copy (a.data, a.data + a.len, data);
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84 }
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85
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86 ~ArrayRep (void) { delete [] data; }
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87
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88 octave_idx_type length (void) const { return len; }
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89
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90 private:
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91
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92 // No assignment!
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93
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94 ArrayRep& operator = (const ArrayRep& a);
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95 };
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96
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97 //--------------------------------------------------------------------
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98
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99 public:
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100
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101 void make_unique (void)
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102 {
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103 if (rep->count > 1)
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104 {
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105 --rep->count;
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106 rep = new ArrayRep (slice_data, slice_len, true);
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107 slice_data = rep->data;
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108 }
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109 }
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110
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111 typedef T element_type;
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112
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113 typedef bool (*compare_fcn_type) (typename ref_param<T>::type,
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114 typename ref_param<T>::type);
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115
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116 protected:
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117
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118 typename Array<T>::ArrayRep *rep;
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119
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120 dim_vector dimensions;
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121
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122 // Rationale:
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123 // slice_data is a pointer to rep->data, denoting together with slice_len the
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124 // actual portion of the data referenced by this Array<T> object. This allows
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125 // to make shallow copies not only of a whole array, but also of contiguous
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126 // subranges. Every time rep is directly manipulated, slice_data and slice_len
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127 // need to be properly updated.
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128
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129 T* slice_data;
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130 octave_idx_type slice_len;
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131
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132 Array (T *d, octave_idx_type n)
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133 : rep (new typename Array<T>::ArrayRep (d, n)), dimensions (n)
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134 {
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135 slice_data = rep->data;
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136 slice_len = rep->len;
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137 }
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138
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139 Array (T *d, const dim_vector& dv)
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140 : rep (new typename Array<T>::ArrayRep (d, get_size (dv))),
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141 dimensions (dv)
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142 {
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143 slice_data = rep->data;
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144 slice_len = rep->len;
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145 }
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146
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147 // slice constructor
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148 Array (const Array<T>& a, const dim_vector& dv,
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149 octave_idx_type l, octave_idx_type u)
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150 : rep(a.rep), dimensions (dv)
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151 {
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152 rep->count++;
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153 slice_data = a.slice_data + l;
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154 slice_len = std::min (u, a.slice_len) - l;
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155 }
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156
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157 private:
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158
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159 typename Array<T>::ArrayRep *nil_rep (void) const
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160 {
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161 static typename Array<T>::ArrayRep *nr
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162 = new typename Array<T>::ArrayRep ();
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163
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164 return nr;
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165 }
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166
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167 template <class U>
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168 T *
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169 coerce (const U *a, octave_idx_type len)
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170 {
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171 T *retval = new T [len];
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172
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173 for (octave_idx_type i = 0; i < len; i++)
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174 retval[i] = T (a[i]);
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175
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176 return retval;
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177 }
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178
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179 public:
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180
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181 Array (void)
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182 : rep (nil_rep ()), dimensions ()
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183 {
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184 rep->count++;
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185 slice_data = rep->data;
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186 slice_len = rep->len;
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187 }
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188
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189 explicit Array (octave_idx_type n)
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190 : rep (new typename Array<T>::ArrayRep (n)), dimensions (n)
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191 {
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192 slice_data = rep->data;
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193 slice_len = rep->len;
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194 }
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195
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196 explicit Array (octave_idx_type n, const T& val)
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197 : rep (new typename Array<T>::ArrayRep (n)), dimensions (n)
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198 {
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199 slice_data = rep->data;
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200 slice_len = rep->len;
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201 fill (val);
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202 }
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203
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204 // Type conversion case.
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205 template <class U>
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206 Array (const Array<U>& a)
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207 : rep (new typename Array<T>::ArrayRep (coerce (a.data (), a.length ()), a.length ())),
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208 dimensions (a.dims ())
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209 {
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210 slice_data = rep->data;
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211 slice_len = rep->len;
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212 }
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213
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214 // No type conversion case.
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215 Array (const Array<T>& a)
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216 : rep (a.rep), dimensions (a.dimensions)
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217 {
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218 rep->count++;
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219 slice_data = a.slice_data;
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220 slice_len = a.slice_len;
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221 }
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222
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223 public:
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224
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225 Array (const dim_vector& dv)
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226 : rep (new typename Array<T>::ArrayRep (get_size (dv))),
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227 dimensions (dv)
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228 {
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229 slice_data = rep->data;
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230 slice_len = rep->len;
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231 }
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232
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233 Array (const dim_vector& dv, const T& val)
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234 : rep (new typename Array<T>::ArrayRep (get_size (dv))),
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235 dimensions (dv)
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236 {
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237 slice_data = rep->data;
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238 slice_len = rep->len;
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239 fill (val);
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240 }
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241
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242 Array (const Array<T>& a, const dim_vector& dv);
228
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243
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244 ~Array (void)
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245 {
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246 if (--rep->count <= 0)
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247 delete rep;
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248 }
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249
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250 Array<T>& operator = (const Array<T>& a)
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251 {
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252 if (this != &a)
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253 {
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254 if (--rep->count <= 0)
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255 delete rep;
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256
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257 rep = a.rep;
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258 rep->count++;
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259
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260 dimensions = a.dimensions;
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261 slice_data = a.slice_data;
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262 slice_len = a.slice_len;
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263 }
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264
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265 return *this;
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266 }
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267
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268 void fill (const T& val);
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269
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270 void clear (void);
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271 void clear (const dim_vector& dv);
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272 void clear (octave_idx_type n)
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273 { clear (dim_vector (n)); }
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274
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275 void clear (octave_idx_type r, octave_idx_type c)
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276 { clear (dim_vector (r, c)); }
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277
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278 octave_idx_type capacity (void) const { return slice_len; }
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279 octave_idx_type length (void) const { return capacity (); }
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280 octave_idx_type nelem (void) const { return capacity (); }
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281 octave_idx_type numel (void) const { return nelem (); }
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282
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283 octave_idx_type dim1 (void) const { return dimensions(0); }
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284 octave_idx_type dim2 (void) const { return dimensions(1); }
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285 octave_idx_type dim3 (void) const { return dimensions(2); }
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286
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287 octave_idx_type rows (void) const { return dim1 (); }
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288 octave_idx_type cols (void) const { return dim2 (); }
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289 octave_idx_type columns (void) const { return dim2 (); }
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290 octave_idx_type pages (void) const { return dim3 (); }
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291
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292 size_t byte_size (void) const { return numel () * sizeof (T); }
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293
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294 // Return a const-reference so that dims ()(i) works efficiently.
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295 const dim_vector& dims (void) const { return dimensions; }
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296
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297 Array<T> squeeze (void) const;
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298
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299 void chop_trailing_singletons (void)
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300 { dimensions.chop_trailing_singletons (); }
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301
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302 static octave_idx_type get_size (octave_idx_type r, octave_idx_type c);
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303 static octave_idx_type get_size (octave_idx_type r, octave_idx_type c, octave_idx_type p);
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304 static octave_idx_type get_size (const dim_vector& dv);
228
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305
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306 octave_idx_type compute_index (const Array<octave_idx_type>& ra_idx) const;
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307
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308 T range_error (const char *fcn, octave_idx_type n) const;
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309 T& range_error (const char *fcn, octave_idx_type n);
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310
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311 T range_error (const char *fcn, octave_idx_type i, octave_idx_type j) const;
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312 T& range_error (const char *fcn, octave_idx_type i, octave_idx_type j);
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313
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314 T range_error (const char *fcn, octave_idx_type i, octave_idx_type j, octave_idx_type k) const;
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315 T& range_error (const char *fcn, octave_idx_type i, octave_idx_type j, octave_idx_type k);
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316
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317 T range_error (const char *fcn, const Array<octave_idx_type>& ra_idx) const;
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318 T& range_error (const char *fcn, const Array<octave_idx_type>& ra_idx);
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319
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320 // No checking, even for multiple references, ever.
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321
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322 T& xelem (octave_idx_type n) { return slice_data [n]; }
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323 T xelem (octave_idx_type n) const { return slice_data [n]; }
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324
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325 T& xelem (octave_idx_type i, octave_idx_type j) { return xelem (dim1()*j+i); }
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326 T xelem (octave_idx_type i, octave_idx_type j) const { return xelem (dim1()*j+i); }
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327
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328 T& xelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return xelem (i, dim2()*k+j); }
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329 T xelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return xelem (i, dim2()*k+j); }
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330
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331 T& xelem (const Array<octave_idx_type>& ra_idx)
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332 { return xelem (compute_index (ra_idx)); }
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333
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334 T xelem (const Array<octave_idx_type>& ra_idx) const
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335 { return xelem (compute_index (ra_idx)); }
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336
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337 // FIXME -- would be nice to fix this so that we don't
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338 // unnecessarily force a copy, but that is not so easy, and I see no
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339 // clean way to do it.
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340
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341 T& checkelem (octave_idx_type n)
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342 {
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343 if (n < 0 || n >= slice_len)
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344 return range_error ("T& Array<T>::checkelem", n);
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345 else
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346 {
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347 make_unique ();
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348 return xelem (n);
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349 }
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350 }
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351
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352 T& checkelem (octave_idx_type i, octave_idx_type j)
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353 {
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354 if (i < 0 || j < 0 || i >= dim1 () || j >= dim2 ())
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355 return range_error ("T& Array<T>::checkelem", i, j);
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356 else
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357 return elem (dim1()*j+i);
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358 }
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359
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360 T& checkelem (octave_idx_type i, octave_idx_type j, octave_idx_type k)
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361 {
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362 if (i < 0 || j < 0 || k < 0 || i >= dim1 () || j >= dim2 () || k >= dim3 ())
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363 return range_error ("T& Array<T>::checkelem", i, j, k);
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364 else
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365 return elem (i, dim2()*k+j);
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366 }
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367
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368 T& checkelem (const Array<octave_idx_type>& ra_idx)
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369 {
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370 octave_idx_type i = compute_index (ra_idx);
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371
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372 if (i < 0)
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373 return range_error ("T& Array<T>::checkelem", ra_idx);
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374 else
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375 return elem (i);
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376 }
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377
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378 T& elem (octave_idx_type n)
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379 {
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380 make_unique ();
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381 return xelem (n);
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382 }
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383
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384 T& elem (octave_idx_type i, octave_idx_type j) { return elem (dim1()*j+i); }
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385
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386 T& elem (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return elem (i, dim2()*k+j); }
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387
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388 T& elem (const Array<octave_idx_type>& ra_idx)
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389 { return Array<T>::elem (compute_index (ra_idx)); }
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390
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391 #if defined (BOUNDS_CHECKING)
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392 T& operator () (octave_idx_type n) { return checkelem (n); }
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393 T& operator () (octave_idx_type i, octave_idx_type j) { return checkelem (i, j); }
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394 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return checkelem (i, j, k); }
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395 T& operator () (const Array<octave_idx_type>& ra_idx) { return checkelem (ra_idx); }
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396 #else
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397 T& operator () (octave_idx_type n) { return elem (n); }
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398 T& operator () (octave_idx_type i, octave_idx_type j) { return elem (i, j); }
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399 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) { return elem (i, j, k); }
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400 T& operator () (const Array<octave_idx_type>& ra_idx) { return elem (ra_idx); }
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401 #endif
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402
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403 T checkelem (octave_idx_type n) const
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404 {
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405 if (n < 0 || n >= slice_len)
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406 return range_error ("T Array<T>::checkelem", n);
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diff changeset
407 else
2108
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408 return xelem (n);
2006
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409 }
1989
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diff changeset
410
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411 T checkelem (octave_idx_type i, octave_idx_type j) const
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412 {
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413 if (i < 0 || j < 0 || i >= dim1 () || j >= dim2 ())
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414 return range_error ("T Array<T>::checkelem", i, j);
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diff changeset
415 else
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416 return elem (dim1()*j+i);
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diff changeset
417 }
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418
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419 T checkelem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const
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420 {
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421 if (i < 0 || j < 0 || k < 0 || i >= dim1 () || j >= dim2 () || k >= dim3 ())
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422 return range_error ("T Array<T>::checkelem", i, j, k);
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423 else
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424 return Array<T>::elem (i, Array<T>::dim1()*k+j);
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425 }
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426
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427 T checkelem (const Array<octave_idx_type>& ra_idx) const
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428 {
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429 octave_idx_type i = compute_index (ra_idx);
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430
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431 if (i < 0)
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432 return range_error ("T Array<T>::checkelem", ra_idx);
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diff changeset
433 else
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
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434 return Array<T>::elem (i);
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diff changeset
435 }
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diff changeset
436
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437 T elem (octave_idx_type n) const { return xelem (n); }
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438
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439 T elem (octave_idx_type i, octave_idx_type j) const { return elem (dim1()*j+i); }
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440
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441 T elem (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return elem (i, dim2()*k+j); }
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442
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443 T elem (const Array<octave_idx_type>& ra_idx) const
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444 { return Array<T>::elem (compute_index (ra_idx)); }
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445
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446 #if defined (BOUNDS_CHECKING)
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447 T operator () (octave_idx_type n) const { return checkelem (n); }
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448 T operator () (octave_idx_type i, octave_idx_type j) const { return checkelem (i, j); }
23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe]
jwe
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449 T operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return checkelem (i, j, k); }
6867
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dbateman
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450 T operator () (const Array<octave_idx_type>& ra_idx) const { return checkelem (ra_idx); }
2006
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451 #else
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452 T operator () (octave_idx_type n) const { return elem (n); }
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jwe
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453 T operator () (octave_idx_type i, octave_idx_type j) const { return elem (i, j); }
23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe]
jwe
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454 T operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k) const { return elem (i, j, k); }
6867
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dbateman
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diff changeset
455 T operator () (const Array<octave_idx_type>& ra_idx) const { return elem (ra_idx); }
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456 #endif
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457
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458 Array<T> reshape (const dim_vector& new_dims) const;
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459
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460 Array<T> permute (const Array<octave_idx_type>& vec, bool inv = false) const;
23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe]
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461 Array<T> ipermute (const Array<octave_idx_type>& vec) const
4593
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462 { return permute (vec, true); }
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463
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464 bool is_square (void) const { return (dim1 () == dim2 ()); }
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465
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466 bool is_empty (void) const { return numel () == 0; }
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467
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468 bool is_vector (void) const { return dimensions.is_vector (); }
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469
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470 Array<T> transpose (void) const;
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471 Array<T> hermitian (T (*fcn) (const T&) = 0) const;
238
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472
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473 const T *data (void) const { return slice_data; }
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474
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475 const T *fortran_vec (void) const { return data (); }
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476
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477 T *fortran_vec (void);
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478
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479 bool is_shared (void) { return rep->count > 1; }
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480
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481 int ndims (void) const { return dimensions.length (); }
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diff changeset
482
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483 void maybe_delete_dims (void);
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484
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485 // Indexing without resizing.
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486
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487 Array<T> index (const idx_vector& i) const;
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488
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489 Array<T> index (const idx_vector& i, const idx_vector& j) const;
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490
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491 Array<T> index (const Array<idx_vector>& ia) const;
1560
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492
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493 static T resize_fill_value ();
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494
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495 // Resizing (with fill).
1560
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496
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diff changeset
497 void resize_fill (octave_idx_type n, const T& rfv);
1560
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498
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diff changeset
499 void resize_fill (octave_idx_type nr, octave_idx_type nc, const T& rfv);
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500
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501 void resize_fill (const dim_vector& dv, const T& rfv);
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502
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diff changeset
503 // Resizing with default fill.
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504 // Rationale:
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505 // These use the default fill value rather than leaving memory uninitialized.
7cbe01c21986 improve dense array indexing
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506 // Resizing without fill leaves the resulting array in a rather weird state,
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diff changeset
507 // where part of the data is initialized an part isn't.
4513
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
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diff changeset
508
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509 void resize (octave_idx_type n)
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diff changeset
510 { resize_fill (n, resize_fill_value ()); }
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diff changeset
511
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parents: 8290
diff changeset
512 // FIXME -- this method cannot be defined here because it would
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John W. Eaton <jwe@octave.org>
parents: 8290
diff changeset
513 // clash with
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diff changeset
514 //
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diff changeset
515 // void resize (octave_idx_type, const T&)
8333
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diff changeset
516 //
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517 // (these become indistinguishable when T = octave_idx_type).
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518 // In the future, I think the resize (.., const T& rfv) overloads
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diff changeset
519 // should go away in favor of using resize_fill.
4513
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520
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521 // void resize (octave_idx_type nr, octave_idx_type nc)
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parents: 8179
diff changeset
522 // { resize_fill (nr, nc, resize_fill_value ()); }
4513
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523
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diff changeset
524 void resize (dim_vector dv)
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parents: 8179
diff changeset
525 { resize_fill (dv, resize_fill_value ()); }
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diff changeset
526
8333
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parents: 8290
diff changeset
527 // FIXME -- these are here for backward compatibility. They should
9238637cb81c style fixes
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diff changeset
528 // go away in favor of using resize_fill directly.
8290
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diff changeset
529 void resize (octave_idx_type n, const T& rfv)
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
530 { resize_fill (n, static_cast<T> (rfv)); }
4513
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
jwe
parents: 4461
diff changeset
531
8290
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diff changeset
532 void resize (octave_idx_type nr, octave_idx_type nc, const T& rfv)
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
533 { resize_fill (nr, nc, rfv); }
2382
58e5955495d7 [project @ 1996-10-12 17:45:06 by jwe]
jwe
parents: 2347
diff changeset
534
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diff changeset
535 void resize (dim_vector dv, const T& rfv)
7cbe01c21986 improve dense array indexing
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diff changeset
536 { resize_fill (dv, rfv); }
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537
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parents: 8179
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538 // Indexing with possible resizing and fill
8333
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parents: 8290
diff changeset
539 // FIXME -- this is really a corner case, that should better be
9238637cb81c style fixes
John W. Eaton <jwe@octave.org>
parents: 8290
diff changeset
540 // handled directly in liboctinterp.
3933
f9ea3dcf58ee [project @ 2002-05-15 03:21:00 by jwe]
jwe
parents: 3928
diff changeset
541
8290
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parents: 8179
diff changeset
542 Array<T> index (const idx_vector& i, bool resize_ok,
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parents: 8179
diff changeset
543 const T& rfv = resize_fill_value ()) const;
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diff changeset
544
7cbe01c21986 improve dense array indexing
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diff changeset
545 Array<T> index (const idx_vector& i, const idx_vector& j,
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
546 bool resize_ok, const T& rfv = resize_fill_value ()) const;
4513
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parents: 4461
diff changeset
547
8290
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diff changeset
548 Array<T> index (const Array<idx_vector>& ia,
7cbe01c21986 improve dense array indexing
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diff changeset
549 bool resize_ok, const T& rfv = resize_fill_value ()) const;
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diff changeset
550
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
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551 // Indexed assignment (always with resize & fill).
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
552
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
553 void assign (const idx_vector& i, const Array<T>& rhs,
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 8179
diff changeset
554 const T& rfv = resize_fill_value ());
4513
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
jwe
parents: 4461
diff changeset
555
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parents: 8179
diff changeset
556 void assign (const idx_vector& i, const idx_vector& j, const Array<T>& rhs,
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 8179
diff changeset
557 const T& rfv = resize_fill_value ());
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diff changeset
558
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
559 void assign (const Array<idx_vector>& ia, const Array<T>& rhs,
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
560 const T& rfv = resize_fill_value ());
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diff changeset
561
7cbe01c21986 improve dense array indexing
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diff changeset
562 // Deleting elements.
7cbe01c21986 improve dense array indexing
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diff changeset
563
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
564 // A(I) = [] (with a single subscript)
7cbe01c21986 improve dense array indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 8179
diff changeset
565 void delete_elements (const idx_vector& i);
4530
e8d87fefd144 [project @ 2003-10-07 04:02:04 by jwe]
jwe
parents: 4518
diff changeset
566
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Jaroslav Hajek <highegg@gmail.com>
parents: 8179
diff changeset
567 // A(:,...,I,...,:) = [] (>= 2 subscripts, one of them is non-colon)
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Jaroslav Hajek <highegg@gmail.com>
parents: 8179
diff changeset
568 void delete_elements (int dim, const idx_vector& i);
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Jaroslav Hajek <highegg@gmail.com>
parents: 8179
diff changeset
569
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parents: 8179
diff changeset
570 // Dispatcher to the above two.
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parents: 8179
diff changeset
571 void delete_elements (const Array<idx_vector>& ia);
4513
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jwe
parents: 4461
diff changeset
572
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parents: 8290
diff changeset
573 // FIXME -- are these required? What exactly are they supposed to do?.
3928
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parents: 3836
diff changeset
574
8290
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diff changeset
575 Array<T>& insert (const Array<T>& a, octave_idx_type r, octave_idx_type c);
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diff changeset
576 Array<T>& insert2 (const Array<T>& a, octave_idx_type r, octave_idx_type c);
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
577 Array<T>& insertN (const Array<T>& a, octave_idx_type r, octave_idx_type c);
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parents: 8179
diff changeset
578
7cbe01c21986 improve dense array indexing
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parents: 8179
diff changeset
579 Array<T>& insert (const Array<T>& a, const Array<octave_idx_type>& idx);
3933
f9ea3dcf58ee [project @ 2002-05-15 03:21:00 by jwe]
jwe
parents: 3928
diff changeset
580
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parents: 8503
diff changeset
581 void maybe_economize (void)
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Jaroslav Hajek <highegg@gmail.com>
parents: 8503
diff changeset
582 {
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parents: 8503
diff changeset
583 if (rep->count == 1 && slice_len != rep->len)
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parents: 8503
diff changeset
584 {
ad3afaaa19c1 implement non-copying contiguous range indexing
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diff changeset
585 ArrayRep *new_rep = new ArrayRep (slice_data, slice_len, true);
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parents: 8503
diff changeset
586 delete rep;
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parents: 8503
diff changeset
587 rep = new_rep;
ad3afaaa19c1 implement non-copying contiguous range indexing
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parents: 8503
diff changeset
588 slice_data = rep->data;
ad3afaaa19c1 implement non-copying contiguous range indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 8503
diff changeset
589 }
ad3afaaa19c1 implement non-copying contiguous range indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 8503
diff changeset
590 }
ad3afaaa19c1 implement non-copying contiguous range indexing
Jaroslav Hajek <highegg@gmail.com>
parents: 8503
diff changeset
591
4517
b4449b1193ac [project @ 2003-09-20 02:06:06 by jwe]
jwe
parents: 4513
diff changeset
592 void print_info (std::ostream& os, const std::string& prefix) const;
5900
c20eb7330d13 [project @ 2006-07-22 08:31:16 by jwe]
jwe
parents: 5775
diff changeset
593
c20eb7330d13 [project @ 2006-07-22 08:31:16 by jwe]
jwe
parents: 5775
diff changeset
594 // Unsafe. This function exists to support the MEX interface.
c20eb7330d13 [project @ 2006-07-22 08:31:16 by jwe]
jwe
parents: 5775
diff changeset
595 // You should not use it anywhere else.
c20eb7330d13 [project @ 2006-07-22 08:31:16 by jwe]
jwe
parents: 5775
diff changeset
596 void *mex_get_data (void) const { return const_cast<T *> (data ()); }
7433
402168152bb9 [project @ 2008-01-31 18:59:09 by dbateman]
dbateman
parents: 7017
diff changeset
597
7463
2467639bd8c0 eliminate UNDEFINED sort mode
John W. Eaton <jwe@octave.org>
parents: 7433
diff changeset
598 Array<T> sort (octave_idx_type dim = 0, sortmode mode = ASCENDING) const;
7433
402168152bb9 [project @ 2008-01-31 18:59:09 by dbateman]
dbateman
parents: 7017
diff changeset
599 Array<T> sort (Array<octave_idx_type> &sidx, octave_idx_type dim = 0,
7463
2467639bd8c0 eliminate UNDEFINED sort mode
John W. Eaton <jwe@octave.org>
parents: 7433
diff changeset
600 sortmode mode = ASCENDING) const;
7503
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
601
8721
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
602 // Ordering is auto-detected or can be specified.
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
603 sortmode is_sorted (sortmode mode = UNSORTED) const;
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
604
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
605 // Sort by rows returns only indices.
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
606 Array<octave_idx_type> sort_rows_idx (sortmode mode = ASCENDING) const;
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
607
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
608 // Ordering is auto-detected or can be specified.
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
609 sortmode is_sorted_rows (sortmode mode = UNSORTED) const;
e9cb742df9eb imported patch sort3.diff
Jaroslav Hajek <highegg@gmail.com>
parents: 8700
diff changeset
610
8814
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
611 // Do a binary lookup in a sorted array.
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
612 // Mode can be specified or is auto-detected by comparing 1st and last element.
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
613 octave_idx_type lookup (const T& value, sortmode mode = UNSORTED) const;
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
614
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
615 // Ditto, but for an array of values, specializing on long runs.
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
616 // If linf is true, the leftmost interval is extended to infinity
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
617 // (indices will be >= 1).
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
618 // If rinf is true, the rightmost interval is extended to infinity
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
619 // (indices will be <= length ()-1).
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
620 Array<octave_idx_type> lookup (const Array<T>& values, sortmode mode = UNSORTED,
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
621 bool linf = false, bool rinf = false) const;
de16ebeef93d improve lookup, provide Array<T>::lookup
Jaroslav Hajek <highegg@gmail.com>
parents: 8725
diff changeset
622
9341
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
623 // This looks up only exact matches, giving their indices. Non-exact matches get
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
624 // the value -1.
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
625 Array<octave_idx_type> lookupm (const Array<T>& values, sortmode mode = UNSORTED) const;
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
626
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
627 // This looks up only exact matches, returning true/false if match.
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
628 Array<bool> lookupb (const Array<T>& values, sortmode mode = UNSORTED) const;
9fd5c56ce57a extend lookup capabilities
Jaroslav Hajek <highegg@gmail.com>
parents: 9201
diff changeset
629
9025
484756d558d6 add Array<T>::find
Jaroslav Hajek <highegg@gmail.com>
parents: 8998
diff changeset
630 // Find indices of (at most n) nonzero elements. If n is specified, backward
484756d558d6 add Array<T>::find
Jaroslav Hajek <highegg@gmail.com>
parents: 8998
diff changeset
631 // specifies search from backward.
484756d558d6 add Array<T>::find
Jaroslav Hajek <highegg@gmail.com>
parents: 8998
diff changeset
632 Array<octave_idx_type> find (octave_idx_type n = -1, bool backward = false) const;
484756d558d6 add Array<T>::find
Jaroslav Hajek <highegg@gmail.com>
parents: 8998
diff changeset
633
7620
36594d5bbe13 Move diag function into the octave_value class
David Bateman <dbateman@free.fr>
parents: 7503
diff changeset
634 Array<T> diag (octave_idx_type k = 0) const;
36594d5bbe13 Move diag function into the octave_value class
David Bateman <dbateman@free.fr>
parents: 7503
diff changeset
635
7503
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
636 template <class U, class F>
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
637 Array<U>
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
638 map (F fcn) const
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
639 {
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
640 octave_idx_type len = length ();
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
641
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
642 const T *m = data ();
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
643
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
644 Array<U> result (dims ());
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
645 U *p = result.fortran_vec ();
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
646
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
647 for (octave_idx_type i = 0; i < len; i++)
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
648 {
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
649 OCTAVE_QUIT;
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
650
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
651 p[i] = fcn (m[i]);
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
652 }
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
653
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
654 return result;
8c32f95c2639 convert mapper functions to new format
David Bateman <dbateman@free.fr>
parents: 7463
diff changeset
655 }
8998
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
656
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
657 // This is non-breakable map, suitable for fast functions. Efficiency
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
658 // relies on compiler's ability to inline a function pointer. This seems
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
659 // to be OK with recent GCC.
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
660 template <class U>
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
661 Array<U>
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
662 fastmap (U (*fcn) (typename ref_param<T>::type)) const
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
663 {
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
664 octave_idx_type len = length ();
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
665
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
666 const T *m = data ();
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
667
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
668 Array<U> result (dims ());
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
669 U *p = result.fortran_vec ();
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
670
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
671 std::transform (m, m + len, p, fcn);
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
672
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
673 return result;
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
674 }
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8950
diff changeset
675
9046
88bf56bbccca make Array::find already return Matlab-compatible dimensions
Jaroslav Hajek <highegg@gmail.com>
parents: 9026
diff changeset
676 template <class U> friend class Array;
9201
472f0e22aa60 guard against implicit instantiation
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
677
472f0e22aa60 guard against implicit instantiation
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
678 private:
472f0e22aa60 guard against implicit instantiation
Jaroslav Hajek <highegg@gmail.com>
parents: 9046
diff changeset
679 static void instantiation_guard ();
4513
508238e65af7 [project @ 2003-09-19 21:40:57 by jwe]
jwe
parents: 4461
diff changeset
680 };
4459
75ee1995d2b4 [project @ 2003-07-11 17:46:41 by jwe]
jwe
parents: 4192
diff changeset
681
9653
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
682 // This is a simple wrapper template that will subclass an Array<T> type or any
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
683 // later type derived from it and override the default non-const operator() to
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
684 // not check for the array's uniqueness. It is, however, the user's
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
685 // responsibility to ensure the array is actually unaliased whenever elements
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
686 // are accessed.
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
687
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
688 template<class ArrayClass>
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
689 class NoAlias : public ArrayClass
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
690 {
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
691 typedef typename ArrayClass::element_type T;
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
692 public:
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
693 NoAlias () : ArrayClass () { }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
694
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
695 // FIXME: this would be simpler once C++0x is available
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
696 template <class X>
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
697 explicit NoAlias (X x) : ArrayClass (x) { }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
698
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
699 template <class X, class Y>
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
700 explicit NoAlias (X x, Y y) : ArrayClass (x, y) { }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
701
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
702 template <class X, class Y, class Z>
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
703 explicit NoAlias (X x, Y y, Z z) : ArrayClass (x, y, z) { }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
704
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
705 T& operator () (octave_idx_type n)
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
706 { return ArrayClass::xelem (n); }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
707 T& operator () (octave_idx_type i, octave_idx_type j)
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
708 { return ArrayClass::xelem (i, j); }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
709 T& operator () (octave_idx_type i, octave_idx_type j, octave_idx_type k)
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
710 { return ArrayClass::xelem (i, j, k); }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
711 T& operator () (const Array<octave_idx_type>& ra_idx)
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
712 { return ArrayClass::xelem (ra_idx); }
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
713 };
e087d7c77ff9 improve linspace in liboctave
Jaroslav Hajek <highegg@gmail.com>
parents: 9624
diff changeset
714
228
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
715 #endif
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
716
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
717 /*
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
718 ;;; Local Variables: ***
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
719 ;;; mode: C++ ***
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
720 ;;; End: ***
ee01ac1c7acc [project @ 1993-11-16 09:56:54 by jwe]
jwe
parents:
diff changeset
721 */