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annotate src/ov-cx-diag.cc @ 8834:8dd69187c4a2

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specialize sqrt for diagonal matrices
author Jaroslav Hajek <highegg@gmail.com>
date Fri, 20 Feb 2009 21:49:26 +0100
parents d95282fa0579
children eb63fbe60fab
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1 /*
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2
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3 Copyright (C) 2008 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 "byte-swap.h"
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28
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29 #include "ov-cx-diag.h"
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30 #include "ov-flt-cx-diag.h"
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31 #include "ov-re-diag.h"
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32 #include "ov-base-diag.cc"
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33 #include "ov-complex.h"
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34 #include "ov-cx-mat.h"
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35 #include "ls-utils.h"
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36
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37 template class octave_base_diag<ComplexDiagMatrix, ComplexMatrix>;
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38
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39 DEFINE_OCTAVE_ALLOCATOR (octave_complex_diag_matrix);
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40
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41 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_complex_diag_matrix,
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42 "complex diagonal matrix", "double");
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43
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44 static octave_base_value *
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45 default_numeric_conversion_function (const octave_base_value& a)
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46 {
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47 CAST_CONV_ARG (const octave_complex_diag_matrix&);
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48
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49 return new octave_complex_matrix (v.complex_matrix_value ());
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50 }
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51
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52 octave_base_value::type_conv_info
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53 octave_complex_diag_matrix::numeric_conversion_function (void) const
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54 {
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55 return octave_base_value::type_conv_info (default_numeric_conversion_function,
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56 octave_complex_matrix::static_type_id ());
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57 }
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58
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59 static octave_base_value *
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60 default_numeric_demotion_function (const octave_base_value& a)
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61 {
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62 CAST_CONV_ARG (const octave_complex_diag_matrix&);
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63
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64 return new octave_float_complex_diag_matrix (v.float_complex_diag_matrix_value ());
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65 }
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66
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67 octave_base_value::type_conv_info
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68 octave_complex_diag_matrix::numeric_demotion_function (void) const
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69 {
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70 return octave_base_value::type_conv_info (default_numeric_demotion_function,
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71 octave_float_complex_diag_matrix::static_type_id ());
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72 }
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73
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74 octave_base_value *
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75 octave_complex_diag_matrix::try_narrowing_conversion (void)
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76 {
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77 octave_base_value *retval = 0;
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78
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79 if (matrix.nelem () == 1)
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80 {
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81 // FIXME: the proxy mechanism of DiagArray2 causes problems here.
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82 retval = new octave_complex (Complex (matrix (0, 0)));
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83 octave_base_value *rv2 = retval->try_narrowing_conversion ();
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84 if (rv2)
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85 {
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86 delete retval;
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87 retval = rv2;
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88 }
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89 }
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90 else if (matrix.all_elements_are_real ())
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91 {
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92 return new octave_diag_matrix (::real (matrix));
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93 }
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94
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95 return retval;
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96 }
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97
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98 DiagMatrix
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99 octave_complex_diag_matrix::diag_matrix_value (bool force_conversion) const
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100 {
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101 DiagMatrix retval;
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102
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103 if (! force_conversion)
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104 gripe_implicit_conversion ("Octave:imag-to-real",
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105 type_name (), "real matrix");
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106
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107 retval = ::real (matrix);
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108
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109 return retval;
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110 }
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111
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112 FloatDiagMatrix
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113 octave_complex_diag_matrix::float_diag_matrix_value (bool force_conversion) const
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114 {
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115 DiagMatrix retval;
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116
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117 if (! force_conversion)
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118 gripe_implicit_conversion ("Octave:imag-to-real",
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119 type_name (), "real matrix");
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120
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121 retval = ::real (matrix);
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122
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123 return retval;
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124 }
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125
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126 ComplexDiagMatrix
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127 octave_complex_diag_matrix::complex_diag_matrix_value (bool) const
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128 {
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129 return matrix;
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130 }
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131
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132 FloatComplexDiagMatrix
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133 octave_complex_diag_matrix::float_complex_diag_matrix_value (bool) const
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134 {
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135 return FloatComplexDiagMatrix (matrix);
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136 }
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137
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138 octave_value
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139 octave_complex_diag_matrix::abs (void) const
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140 {
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141 return matrix.abs ();
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142 }
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143
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144 octave_value
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145 octave_complex_diag_matrix::real (void) const
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146 {
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147 return ::real (matrix);
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148 }
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149
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150 octave_value
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151 octave_complex_diag_matrix::conj (void) const
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152 {
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153 return ::conj (matrix);
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154 }
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155
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156 octave_value
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157 octave_complex_diag_matrix::imag (void) const
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158 {
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159 return ::imag (matrix);
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160 }
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161
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162 octave_value
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163 octave_complex_diag_matrix::sqrt (void) const
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164 {
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165 octave_value retval;
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166
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167 static ComplexNDArray::cmapper csqrt = std::sqrt;
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168
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169 ComplexColumnVector dvec = matrix.diag ();
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170 retval = ComplexDiagMatrix (dvec.map (csqrt));
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171
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172 retval.resize (dims ());
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173
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174 return retval;
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175 }
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176
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177 bool
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178 octave_complex_diag_matrix::save_binary (std::ostream& os, bool& save_as_floats)
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179 {
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180
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181 int32_t r = matrix.rows (), c = matrix.cols ();
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182 os.write (reinterpret_cast<char *> (&r), 4);
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183 os.write (reinterpret_cast<char *> (&c), 4);
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184
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185 ComplexMatrix m = ComplexMatrix (matrix.diag ());
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186 save_type st = LS_DOUBLE;
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187 if (save_as_floats)
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188 {
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189 if (m.too_large_for_float ())
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190 {
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191 warning ("save: some values too large to save as floats --");
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192 warning ("save: saving as doubles instead");
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193 }
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194 else
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195 st = LS_FLOAT;
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196 }
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197 else if (matrix.length () > 4096) // FIXME -- make this configurable.
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198 {
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199 double max_val, min_val;
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200 if (m.all_integers (max_val, min_val))
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201 st = get_save_type (max_val, min_val);
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202 }
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203
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204 const Complex *mtmp = m.data ();
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205 write_doubles (os, reinterpret_cast<const double *> (mtmp), st, 2 * m.numel ());
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206
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207 return true;
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208 }
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209
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210 bool
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211 octave_complex_diag_matrix::load_binary (std::istream& is, bool swap,
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212 oct_mach_info::float_format fmt)
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213 {
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214 int32_t r, c;
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215 char tmp;
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216 if (! (is.read (reinterpret_cast<char *> (&r), 4)
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217 && is.read (reinterpret_cast<char *> (&c), 4)
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218 && is.read (reinterpret_cast<char *> (&tmp), 1)))
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219 return false;
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220 if (swap)
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221 {
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222 swap_bytes<4> (&r);
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223 swap_bytes<4> (&c);
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224 }
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225
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226 ComplexDiagMatrix m (r, c);
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227 Complex *im = m.fortran_vec ();
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228 octave_idx_type len = m.length ();
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229 read_doubles (is, reinterpret_cast<double *> (im),
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230 static_cast<save_type> (tmp), 2 * len, swap, fmt);
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231 if (error_state || ! is)
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232 return false;
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233 matrix = m;
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234
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235 return true;
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236 }
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237
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238 bool
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239 octave_complex_diag_matrix::chk_valid_scalar (const octave_value& val,
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240 Complex& x) const
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241 {
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242 bool retval = val.is_complex_scalar () || val.is_real_scalar ();
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243 if (retval)
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244 x = val.complex_value ();
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245 return retval;
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246 }