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annotate src/ov-base-diag.cc @ 16088:b29b10fbb744 stable release-3-6-4

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Version 3.6.4 released. * configure.ac (AC_INIT): Version is now 3.6.4. (OCTAVE_RELEASE_DATE): Now 2013-02-21.
author John W. Eaton <jwe@octave.org>
date Thu, 21 Feb 2013 15:17:54 -0500
parents d174210ce1ec
children
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1 /*
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2
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3 Copyright (C) 2008-2012 Jaroslav Hajek
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <iostream>
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28
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29 #include "mach-info.h"
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30 #include "lo-ieee.h"
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31
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32 #include "ov-base.h"
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33 #include "ov-base-mat.h"
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34 #include "pr-output.h"
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35 #include "error.h"
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36 #include "gripes.h"
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37 #include "oct-stream.h"
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38 #include "ops.h"
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39
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40 #include "ls-oct-ascii.h"
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41
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42 template <class DMT, class MT>
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43 octave_value
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44 octave_base_diag<DMT, MT>::subsref (const std::string& type,
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45 const std::list<octave_value_list>& idx)
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46 {
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47 octave_value retval;
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48
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49 switch (type[0])
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50 {
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51 case '(':
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52 retval = do_index_op (idx.front ());
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53 break;
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54
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55 case '{':
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56 case '.':
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57 {
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58 std::string nm = type_name ();
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59 error ("%s cannot be indexed with %c", nm.c_str (), type[0]);
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60 }
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61 break;
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62
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63 default:
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64 panic_impossible ();
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65 }
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66
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67 return retval.next_subsref (type, idx);
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68 }
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69
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70
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71 template <class DMT, class MT>
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72 octave_value
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73 octave_base_diag<DMT,MT>::diag (octave_idx_type k) const
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74 {
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75 octave_value retval;
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76 if (matrix.rows () == 1 || matrix.cols () == 1)
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77 {
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78 // Rather odd special case. This is a row or column vector
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79 // represented as a diagonal matrix with a single nonzero entry, but
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80 // Fdiag semantics are to product a diagonal matrix for vector
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81 // inputs.
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82 if (k == 0)
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83 // Returns Diag2Array<T> with nnz <= 1.
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84 retval = matrix.build_diag_matrix ();
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85 else
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86 // Returns Array<T> matrix
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87 retval = matrix.array_value ().diag (k);
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88 }
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89 else
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90 // Returns Array<T> vector
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91 retval = matrix.extract_diag (k);
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92 return retval;
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93 }
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94
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95
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96 template <class DMT, class MT>
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97 octave_value
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98 octave_base_diag<DMT, MT>::do_index_op (const octave_value_list& idx,
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99 bool resize_ok)
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100 {
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101 octave_value retval;
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102 typedef typename DMT::element_type el_type;
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103
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104 if (idx.length () == 2 && ! resize_ok)
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105 {
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106 idx_vector idx0 = idx(0).index_vector ();
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107 idx_vector idx1 = idx(1).index_vector ();
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108
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109 if (idx0.is_scalar () && idx1.is_scalar ())
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110 {
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111 retval = matrix.elem (idx0(0), idx1(0));
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112 }
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113 else
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114 {
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115 octave_idx_type m = idx0.length (matrix.rows ());
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116 octave_idx_type n = idx1.length (matrix.columns ());
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117 if (idx0.is_colon_equiv (m) && idx1.is_colon_equiv (n)
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118 && m <= matrix.rows () && n <= matrix.rows ())
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119 {
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120 DMT rm (matrix);
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121 rm.resize (m, n);
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122 retval = rm;
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123 }
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124 else
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125 retval = to_dense ().do_index_op (idx, resize_ok);
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126 }
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127 }
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128 else
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129 retval = to_dense ().do_index_op (idx, resize_ok);
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130
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131 return retval;
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132 }
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133
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134 template <class DMT, class MT>
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135 octave_value
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136 octave_base_diag<DMT, MT>::subsasgn (const std::string& type,
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137 const std::list<octave_value_list>& idx,
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138 const octave_value& rhs)
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139 {
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140 octave_value retval;
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141
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142 switch (type[0])
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143 {
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144 case '(':
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145 {
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146 if (type.length () == 1)
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147 {
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148 octave_value_list jdx = idx.front ();
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149 // Check for a simple element assignment. That means, if D is a diagonal matrix,
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150 // 'D(i,i) = x' will not destroy its diagonality (provided i is a valid index).
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151 if (jdx.length () == 2 && jdx(0).is_scalar_type () && jdx(1).is_scalar_type ())
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152 {
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153 typename DMT::element_type val;
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154 idx_vector i0 = jdx(0).index_vector (), i1 = jdx(1).index_vector ();
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155 if (! error_state && i0(0) == i1(0)
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156 && i0(0) < matrix.rows () && i1(0) < matrix.cols ()
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157 && chk_valid_scalar (rhs, val))
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158 {
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159 matrix.dgelem (i0(0)) = val;
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160 retval = this;
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161 this->count++;
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162 // invalidate cache
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163 dense_cache = octave_value ();
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164 }
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165 }
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166
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167 if (! error_state && ! retval.is_defined ())
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168 retval = numeric_assign (type, idx, rhs);
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169 }
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170 else
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171 {
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172 std::string nm = type_name ();
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173 error ("in indexed assignment of %s, last lhs index must be ()",
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174 nm.c_str ());
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175 }
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176 }
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177 break;
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178
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179 case '{':
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180 case '.':
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181 {
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182 if (is_empty ())
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183 {
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184 octave_value tmp = octave_value::empty_conv (type, rhs);
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185
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186 retval = tmp.subsasgn (type, idx, rhs);
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187 }
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188 else
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189 {
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190 std::string nm = type_name ();
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191 error ("%s cannot be indexed with %c", nm.c_str (), type[0]);
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192 }
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193 }
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194 break;
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195
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196 default:
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197 panic_impossible ();
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198 }
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199
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200 return retval;
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201 }
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202
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203 template <class DMT, class MT>
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204 octave_value
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205 octave_base_diag<DMT, MT>::resize (const dim_vector& dv, bool fill) const
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206 {
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207 octave_value retval;
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208 if (dv.length () == 2)
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209 {
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210 DMT rm (matrix);
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211 rm.resize (dv(0), dv(1));
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212 retval = rm;
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213 }
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214 else
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215 retval = to_dense ().resize (dv, fill);
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216 return retval;
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217 }
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218
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219 template <class DMT, class MT>
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220 bool
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221 octave_base_diag<DMT, MT>::is_true (void) const
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222 {
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223 return to_dense ().is_true ();
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224 }
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225
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226 // FIXME: this should be achieveable using ::real
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227 template <class T> inline T helper_getreal (T x) { return x; }
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228 template <class T> inline T helper_getreal (std::complex<T> x) { return x.real (); }
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229 // FIXME: we really need some traits so that ad hoc hooks like this are not necessary
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230 template <class T> inline T helper_iscomplex (T) { return false; }
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231 template <class T> inline T helper_iscomplex (std::complex<T>) { return true; }
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232
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233 template <class DMT, class MT>
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234 double
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235 octave_base_diag<DMT, MT>::double_value (bool force_conversion) const
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236 {
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237 double retval = lo_ieee_nan_value ();
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238 typedef typename DMT::element_type el_type;
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239
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240 if (helper_iscomplex (el_type ()) && ! force_conversion)
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241 gripe_implicit_conversion ("Octave:imag-to-real",
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242 "complex matrix", "real scalar");
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243
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244 if (numel () > 0)
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245 {
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246 gripe_implicit_conversion ("Octave:array-as-scalar",
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247 type_name (), "real scalar");
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248
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249 retval = helper_getreal (el_type (matrix (0, 0)));
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250 }
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251 else
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252 gripe_invalid_conversion (type_name (), "real scalar");
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253
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254 return retval;
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255 }
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256
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257 template <class DMT, class MT>
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258 float
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259 octave_base_diag<DMT, MT>::float_value (bool force_conversion) const
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260 {
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261 float retval = lo_ieee_float_nan_value ();
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262 typedef typename DMT::element_type el_type;
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263
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264 if (helper_iscomplex (el_type ()) && ! force_conversion)
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265 gripe_implicit_conversion ("Octave:imag-to-real",
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266 "complex matrix", "real scalar");
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267
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268 if (numel () > 0)
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269 {
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270 gripe_implicit_conversion ("Octave:array-as-scalar",
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271 type_name (), "real scalar");
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272
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273 retval = helper_getreal (el_type (matrix (0, 0)));
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274 }
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275 else
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276 gripe_invalid_conversion (type_name (), "real scalar");
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277
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278 return retval;
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279 }
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280
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281 template <class DMT, class MT>
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282 Complex
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283 octave_base_diag<DMT, MT>::complex_value (bool) const
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284 {
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285 double tmp = lo_ieee_nan_value ();
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286
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287 Complex retval (tmp, tmp);
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288
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289 if (rows () > 0 && columns () > 0)
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290 {
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291 gripe_implicit_conversion ("Octave:array-as-scalar",
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292 type_name (), "complex scalar");
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293
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294 retval = matrix (0, 0);
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295 }
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296 else
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297 gripe_invalid_conversion (type_name (), "complex scalar");
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298
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299 return retval;
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300 }
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301
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302 template <class DMT, class MT>
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303 FloatComplex
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304 octave_base_diag<DMT, MT>::float_complex_value (bool) const
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305 {
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306 float tmp = lo_ieee_float_nan_value ();
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307
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308 FloatComplex retval (tmp, tmp);
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309
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310 if (rows () > 0 && columns () > 0)
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311 {
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312 gripe_implicit_conversion ("Octave:array-as-scalar",
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313 type_name (), "complex scalar");
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314
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315 retval = matrix (0, 0);
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316 }
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317 else
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318 gripe_invalid_conversion (type_name (), "complex scalar");
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319
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320 return retval;
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321 }
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322
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323 template <class DMT, class MT>
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324 Matrix
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325 octave_base_diag<DMT, MT>::matrix_value (bool) const
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326 {
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327 return Matrix (diag_matrix_value ());
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328 }
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329
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330 template <class DMT, class MT>
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331 FloatMatrix
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332 octave_base_diag<DMT, MT>::float_matrix_value (bool) const
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333 {
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334 return FloatMatrix (float_diag_matrix_value ());
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335 }
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336
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337 template <class DMT, class MT>
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338 ComplexMatrix
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339 octave_base_diag<DMT, MT>::complex_matrix_value (bool) const
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340 {
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341 return ComplexMatrix (complex_diag_matrix_value ());
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342 }
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343
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344 template <class DMT, class MT>
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345 FloatComplexMatrix
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346 octave_base_diag<DMT, MT>::float_complex_matrix_value (bool) const
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347 {
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348 return FloatComplexMatrix (float_complex_diag_matrix_value ());
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349 }
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350
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351 template <class DMT, class MT>
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352 NDArray
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353 octave_base_diag<DMT, MT>::array_value (bool) const
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354 {
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355 return NDArray (matrix_value ());
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356 }
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357
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358 template <class DMT, class MT>
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359 FloatNDArray
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360 octave_base_diag<DMT, MT>::float_array_value (bool) const
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361 {
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362 return FloatNDArray (float_matrix_value ());
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363 }
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364
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365 template <class DMT, class MT>
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366 ComplexNDArray
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367 octave_base_diag<DMT, MT>::complex_array_value (bool) const
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368 {
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369 return ComplexNDArray (complex_matrix_value ());
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370 }
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371
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372 template <class DMT, class MT>
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373 FloatComplexNDArray
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374 octave_base_diag<DMT, MT>::float_complex_array_value (bool) const
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375 {
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376 return FloatComplexNDArray (float_complex_matrix_value ());
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377 }
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378
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379 template <class DMT, class MT>
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380 boolNDArray
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381 octave_base_diag<DMT, MT>::bool_array_value (bool warn) const
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382 {
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383 return to_dense ().bool_array_value (warn);
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384 }
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385
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386 template <class DMT, class MT>
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387 charNDArray
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388 octave_base_diag<DMT, MT>::char_array_value (bool warn) const
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389 {
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390 return to_dense ().char_array_value (warn);
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391 }
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392
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393 template <class DMT, class MT>
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394 SparseMatrix
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395 octave_base_diag<DMT, MT>::sparse_matrix_value (bool) const
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396 {
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397 return SparseMatrix (diag_matrix_value ());
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398 }
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399
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400 template <class DMT, class MT>
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401 SparseComplexMatrix
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402 octave_base_diag<DMT, MT>::sparse_complex_matrix_value (bool) const
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403 {
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404 return SparseComplexMatrix (complex_diag_matrix_value ());
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405 }
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406
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407 template <class DMT, class MT>
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408 idx_vector
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409 octave_base_diag<DMT, MT>::index_vector (void) const
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410 {
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411 return to_dense ().index_vector ();
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412 }
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413
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414 template <class DMT, class MT>
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415 octave_value
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416 octave_base_diag<DMT, MT>::convert_to_str_internal (bool pad, bool force, char type) const
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417 {
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418 return to_dense ().convert_to_str_internal (pad, force, type);
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419 }
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420
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421 template <class DMT, class MT>
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422 bool
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423 octave_base_diag<DMT, MT>::save_ascii (std::ostream& os)
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424 {
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425 os << "# rows: " << matrix.rows () << "\n"
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426 << "# columns: " << matrix.columns () << "\n";
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427
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428 os << matrix.diag ();
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429
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430 return true;
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431 }
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432
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433 template <class DMT, class MT>
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434 bool
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435 octave_base_diag<DMT, MT>::load_ascii (std::istream& is)
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436 {
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437 octave_idx_type r = 0, c = 0;
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438 bool success = true;
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439
8376
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440 if (extract_keyword (is, "rows", r, true)
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441 && extract_keyword (is, "columns", c, true))
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442 {
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443 octave_idx_type l = r < c ? r : c;
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444 MT tmp (l, 1);
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445 is >> tmp;
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446
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447 if (!is)
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448 {
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449 error ("load: failed to load diagonal matrix constant");
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450 success = false;
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451 }
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452 else
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453 {
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454 // This is a little tricky, as we have the Matrix type, but
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455 // not ColumnVector type. We need to help the compiler get
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456 // through the inheritance tree.
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457 typedef typename DMT::element_type el_type;
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458 matrix = DMT (MDiagArray2<el_type> (MArray<el_type> (tmp)));
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459 matrix.resize (r, c);
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460
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461 // Invalidate cache. Probably not necessary, but safe.
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462 dense_cache = octave_value ();
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463 }
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464 }
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465 else
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466 {
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467 error ("load: failed to extract number of rows and columns");
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468 success = false;
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469 }
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470
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471 return success;
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472 }
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473
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474 template <class DMT, class MT>
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475 void
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476 octave_base_diag<DMT, MT>::print_raw (std::ostream& os,
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477 bool pr_as_read_syntax) const
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478 {
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479 return octave_print_internal (os, matrix, pr_as_read_syntax,
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480 current_print_indent_level ());
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481 }
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482
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483 template <class DMT, class MT>
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484 mxArray *
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485 octave_base_diag<DMT, MT>::as_mxArray (void) const
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486 {
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487 return to_dense ().as_mxArray ();
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488 }
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489
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490 template <class DMT, class MT>
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491 bool
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492 octave_base_diag<DMT, MT>::print_as_scalar (void) const
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493 {
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494 dim_vector dv = dims ();
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495
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496 return (dv.all_ones () || dv.any_zero ());
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497 }
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498
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499 template <class DMT, class MT>
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500 void
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501 octave_base_diag<DMT, MT>::print (std::ostream& os, bool pr_as_read_syntax) const
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502 {
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503 print_raw (os, pr_as_read_syntax);
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504 newline (os);
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505 }
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506 template <class DMT, class MT>
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507 int
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508 octave_base_diag<DMT, MT>::write (octave_stream& os, int block_size,
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509 oct_data_conv::data_type output_type, int skip,
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510 oct_mach_info::float_format flt_fmt) const
11586
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511 {
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512 return to_dense ().write (os, block_size, output_type, skip, flt_fmt);
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513 }
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514
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515 template <class DMT, class MT>
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516 void
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517 octave_base_diag<DMT, MT>::print_info (std::ostream& os,
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518 const std::string& prefix) const
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519 {
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520 matrix.print_info (os, prefix);
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521 }
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522
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523 template <class DMT, class MT>
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524 octave_value
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525 octave_base_diag<DMT, MT>::to_dense (void) const
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526 {
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527 if (! dense_cache.is_defined ())
9358
d4b1314a7c31 mex.cc (mxArray_octave_value::get_data): avoid enumerating types that can be handled as foreign
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528 dense_cache = MT (matrix);
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529
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530 return dense_cache;
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531 }
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532