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annotate liboctave/DiagArray2.cc @ 14628:63ae976ac2e7 stable

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preserve DiagArray2 interface for stable release series * DiagArray2.h (DiagArray2::checkelem): Restore function. Provide non-const version. (DiagArray2::check_idx): Return bool status. (DiagArray2::operator ()): Call checkelem, not check_idx.
author John W. Eaton <jwe@octave.org>
date Sat, 12 May 2012 12:31:34 -0400
parents 6250e1232c9c
children fd5c0159b588
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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) 1996-2012 John W. Eaton
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5 Copyright (C) 2010 VZLU Prague
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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 DiagArray2<T>::DiagArray2 (const Array<T>& a, octave_idx_type r,
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41 octave_idx_type c)
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42 : Array<T> (a.as_column ()), d1 (r), d2 (c)
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43 {
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44 octave_idx_type rcmin = std::min (r, c);
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45 if (rcmin != a.length ())
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46 Array<T>::resize (dim_vector (rcmin, 1));
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47 }
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48
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49 template <class T>
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50 Array<T>
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51 DiagArray2<T>::diag (octave_idx_type k) const
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52 {
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53 Array<T> d;
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54
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55 if (k == 0)
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56 // The main diagonal is shallow-copied.
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57 d = *this;
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58 else if (k > 0 && k < cols ())
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59 d = Array<T> (dim_vector (std::min (cols () - k, rows ()), 1), T ());
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60 else if (k < 0 && -k < rows ())
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61 d = Array<T> (dim_vector (std::min (rows () + k, cols ()), 1), T ());
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62 else
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63 (*current_liboctave_error_handler)
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64 ("diag: requested diagonal out of range");
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65
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66 return d;
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67 }
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68
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69 template <class T>
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70 DiagArray2<T>
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71 DiagArray2<T>::transpose (void) const
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72 {
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73 return DiagArray2<T> (*this, d2, d1);
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74 }
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75
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76 template <class T>
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77 DiagArray2<T>
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78 DiagArray2<T>::hermitian (T (* fcn) (const T&)) const
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79 {
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80 return DiagArray2<T> (Array<T>::template map<T> (fcn), d2, d1);
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81 }
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82
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83 // A two-dimensional array with diagonal elements only.
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84
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85 template <class T>
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86 void
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87 DiagArray2<T>::resize (octave_idx_type r, octave_idx_type c,
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88 const T& rfv)
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89 {
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90 if (r < 0 || c < 0)
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91 {
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92 (*current_liboctave_error_handler) ("can't resize to negative dimensions");
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93 return;
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94 }
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95
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96 if (r != dim1 () || c != dim2 ())
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97 {
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98 Array<T>::resize (dim_vector (std::min (r, c), 1), rfv);
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99 d1 = r; d2 = c;
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100 }
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101 }
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102
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103 template <class T>
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104 Array<T>
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105 DiagArray2<T>::array_value (void) const
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106 {
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107 Array<T> result (dims (), T (0));
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108
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109 for (octave_idx_type i = 0, len = length (); i < len; i++)
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110 result.xelem (i, i) = dgelem (i);
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111
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112 return result;
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113 }
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114
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115 template <typename T>
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116 bool
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117 DiagArray2<T>::check_idx (octave_idx_type r, octave_idx_type c) const
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118 {
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119 bool ok = true;
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120
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121 if (r < 0 || r >= dim1 ())
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122 {
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123 gripe_index_out_of_range (2, 1, r+1, dim1 ());
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124 ok = false;
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125 }
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126
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127 if (c < 0 || c >= dim2 ())
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128 {
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129 gripe_index_out_of_range (2, 2, c+1, dim2 ());
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130 ok = false;
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131 }
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132
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133 return ok;
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134 }