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annotate liboctave/DiagArray2.cc @ 8920:eb63fbe60fab

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update copyright notices
author John W. Eaton <jwe@octave.org>
date Sat, 07 Mar 2009 10:41:27 -0500
parents 937921654627
children 4c0cdbe0acca
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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) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2007,
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5 2008, 2009 John W. Eaton
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6
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7 This file is part of Octave.
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8
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9 Octave is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 3 of the License, or (at your
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12 option) any later version.
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13
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14 Octave is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with Octave; see the file COPYING. If not, see
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21 <http://www.gnu.org/licenses/>.
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22
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23 */
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24
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25 #ifdef HAVE_CONFIG_H
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26 #include <config.h>
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27 #endif
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28
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29 #include <cassert>
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30
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31 #include <iostream>
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32
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33 #include <algorithm>
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34
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35 #include "DiagArray2.h"
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36
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37 #include "lo-error.h"
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38
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39 template <class T>
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40 const typename DiagArray2<T>::Proxy&
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41 DiagArray2<T>::Proxy::operator = (const T& val) const
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42 {
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43 if (i == j)
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44 {
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45 if (object)
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46 object->set (val, i);
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47 }
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48 else
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49 (*current_liboctave_error_handler)
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50 ("invalid assignment to off-diagonal in diagonal array");
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51
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52 return *this;
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53 }
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54
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55 template <class T>
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56 DiagArray2<T>::Proxy::operator T () const
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57 {
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58 if (object && i == j)
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59 return object->get (i);
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60 else
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61 {
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62 static T foo;
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63 return foo;
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64 }
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65 }
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66
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67 template <class T>
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68 Array<T>
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69 DiagArray2<T>::diag (octave_idx_type k) const
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70 {
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71 Array<T> d;
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72
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73 if (k == 0)
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74 // The main diagonal is shallow-copied.
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75 d = *this;
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76 else if (k > 0 && k < cols ())
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77 d = Array<T> (std::min (cols () - k, rows ()), T ());
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78 else if (k < 0 && -k < rows ())
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79 d = Array<T> (std::min (rows () + k, cols ()), T ());
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80 else
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81 (*current_liboctave_error_handler)
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82 ("diag: requested diagonal out of range");
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83
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84 return d;
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85 }
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86
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87 template <class T>
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88 DiagArray2<T>
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89 DiagArray2<T>::transpose (void) const
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90 {
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91 DiagArray2<T> retval (*this);
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92 retval.d1 = d2;
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93 retval.d2 = d1;
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94 return retval;
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95 }
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96
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97 template <class T>
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98 DiagArray2<T>
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99 DiagArray2<T>::hermitian (T (* fcn) (const T&)) const
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100 {
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101 DiagArray2<T> retval (dim2 (), dim1 ());
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102 const T *p = this->data ();
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103 T *q = retval.fortran_vec ();
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104 for (octave_idx_type i = 0; i < this->length (); i++)
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105 q [i] = fcn (p [i]);
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106 return retval;
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107 }
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108
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109 // A two-dimensional array with diagonal elements only.
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110
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111 template <class T>
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112 T
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113 DiagArray2<T>::checkelem (octave_idx_type r, octave_idx_type c) const
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114 {
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115 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ())
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116 {
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117 (*current_liboctave_error_handler) ("range error in DiagArray2");
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118 return T ();
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119 }
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120 return elem (r, c);
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121 }
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122
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123 template <class T>
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124 typename DiagArray2<T>::Proxy
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125 DiagArray2<T>::checkelem (octave_idx_type r, octave_idx_type c)
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126 {
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127 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ())
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128 {
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129 (*current_liboctave_error_handler) ("range error in DiagArray2");
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130 return Proxy (0, r, c);
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131 }
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132 else
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133 return Proxy (this, r, c);
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134 }
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135
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136 template <class T>
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137 void
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138 DiagArray2<T>::resize (octave_idx_type r, octave_idx_type c)
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139 {
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140 if (r < 0 || c < 0)
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141 {
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142 (*current_liboctave_error_handler) ("can't resize to negative dimensions");
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143 return;
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144 }
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145
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146 if (r != dim1 () || c != dim2 ())
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147 {
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148 Array<T>::resize (std::min (r, c));
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149 d1 = r; d2 = c;
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150 }
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151 }
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152
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153 template <class T>
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154 void
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155 DiagArray2<T>::resize_fill (octave_idx_type r, octave_idx_type c, const T& val)
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156 {
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157 if (r < 0 || c < 0)
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158 {
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159 (*current_liboctave_error_handler) ("can't resize to negative dimensions");
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160 return;
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161 }
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162
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163 if (r != dim1 () || c != dim2 ())
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164 {
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165 Array<T>::resize_fill (std::min (r, c), val);
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166 d1 = r; d2 = c;
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167 }
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168 }
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169
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170 template <class T>
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171 DiagArray2<T>::operator Array2<T> (void) const
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172 {
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173 Array2<T> result (dim1 (), dim2 ());
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174 for (octave_idx_type i = 0, len = length (); i < len; i++)
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175 result.xelem (i, i) = dgelem (i);
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176
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177 return result;
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178 }
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179
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180 /*
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181 ;;; Local Variables: ***
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182 ;;; mode: C++ ***
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183 ;;; End: ***
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184 */