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annotate libinterp/octave-value/ov-cx-diag.cc @ 18191:f80d258a2c7d stable

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get_first_help_sentence.m: avoid out-of-bound error (bug #41053) * get_first_help_sentence.m: avoid out-of-bound error (bug #41053)
author Philip Nienhuis <prnienhuis@users.sf.net>
date Thu, 02 Jan 2014 11:54:51 +0100
parents 175b392e91fe
children 6a71e5030df5
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1 /*
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2
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3 Copyright (C) 2008-2013 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
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56 (default_numeric_conversion_function,
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57 octave_complex_matrix::static_type_id ());
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58 }
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59
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60 static octave_base_value *
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61 default_numeric_demotion_function (const octave_base_value& a)
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62 {
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63 CAST_CONV_ARG (const octave_complex_diag_matrix&);
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64
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65 return new octave_float_complex_diag_matrix
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66 (v.float_complex_diag_matrix_value ());
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67 }
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68
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69 octave_base_value::type_conv_info
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70 octave_complex_diag_matrix::numeric_demotion_function (void) const
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71 {
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72 return
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73 octave_base_value::type_conv_info (default_numeric_demotion_function,
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74 octave_float_complex_diag_matrix::static_type_id ());
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75 }
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76
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77 octave_base_value *
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78 octave_complex_diag_matrix::try_narrowing_conversion (void)
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79 {
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80 octave_base_value *retval = 0;
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81
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82 if (matrix.nelem () == 1)
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83 {
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84 retval = new octave_complex (matrix (0, 0));
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85 octave_base_value *rv2 = retval->try_narrowing_conversion ();
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86 if (rv2)
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87 {
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88 delete retval;
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89 retval = rv2;
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90 }
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91 }
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92 else if (matrix.all_elements_are_real ())
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93 {
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94 return new octave_diag_matrix (::real (matrix));
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95 }
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96
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97 return retval;
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98 }
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99
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100 DiagMatrix
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101 octave_complex_diag_matrix::diag_matrix_value (bool force_conversion) const
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102 {
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103 DiagMatrix retval;
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104
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105 if (! force_conversion)
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106 gripe_implicit_conversion ("Octave:imag-to-real",
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107 type_name (), "real matrix");
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108
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109 retval = ::real (matrix);
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110
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111 return retval;
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112 }
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113
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114 FloatDiagMatrix
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115 octave_complex_diag_matrix::float_diag_matrix_value (bool force_conversion) const
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116 {
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117 DiagMatrix retval;
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118
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119 if (! force_conversion)
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120 gripe_implicit_conversion ("Octave:imag-to-real",
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121 type_name (), "real matrix");
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122
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123 retval = ::real (matrix);
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124
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125 return retval;
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126 }
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127
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128 ComplexDiagMatrix
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129 octave_complex_diag_matrix::complex_diag_matrix_value (bool) const
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130 {
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131 return matrix;
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132 }
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133
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134 FloatComplexDiagMatrix
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135 octave_complex_diag_matrix::float_complex_diag_matrix_value (bool) const
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136 {
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137 return FloatComplexDiagMatrix (matrix);
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138 }
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139
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140 octave_value
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141 octave_complex_diag_matrix::map (unary_mapper_t umap) const
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142 {
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143 switch (umap)
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144 {
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145 case umap_abs:
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146 return matrix.abs ();
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147 case umap_real:
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148 return ::real (matrix);
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149 case umap_conj:
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150 return ::conj (matrix);
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151 case umap_imag:
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152 return ::imag (matrix);
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153 case umap_sqrt:
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154 {
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155 ComplexColumnVector tmp =
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156 matrix.extract_diag ().map<Complex> (std::sqrt);
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157 ComplexDiagMatrix retval (tmp);
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158 retval.resize (matrix.rows (), matrix.columns ());
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159 return retval;
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160 }
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161 default:
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162 return to_dense ().map (umap);
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163 }
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164 }
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165
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166 bool
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167 octave_complex_diag_matrix::save_binary (std::ostream& os, bool& save_as_floats)
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168 {
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169
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170 int32_t r = matrix.rows (), c = matrix.cols ();
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171 os.write (reinterpret_cast<char *> (&r), 4);
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172 os.write (reinterpret_cast<char *> (&c), 4);
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173
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174 ComplexMatrix m = ComplexMatrix (matrix.extract_diag ());
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175 save_type st = LS_DOUBLE;
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176 if (save_as_floats)
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177 {
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178 if (m.too_large_for_float ())
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179 {
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180 warning ("save: some values too large to save as floats --");
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181 warning ("save: saving as doubles instead");
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182 }
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183 else
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184 st = LS_FLOAT;
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185 }
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186 else if (matrix.length () > 4096) // FIXME: make this configurable.
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187 {
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188 double max_val, min_val;
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189 if (m.all_integers (max_val, min_val))
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190 st = get_save_type (max_val, min_val);
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191 }
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192
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193 const Complex *mtmp = m.data ();
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194 write_doubles (os, reinterpret_cast<const double *> (mtmp), st,
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195 2 * m.numel ());
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196
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197 return true;
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198 }
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199
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200 bool
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201 octave_complex_diag_matrix::load_binary (std::istream& is, bool swap,
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202 oct_mach_info::float_format fmt)
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203 {
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204 int32_t r, c;
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205 char tmp;
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206 if (! (is.read (reinterpret_cast<char *> (&r), 4)
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207 && is.read (reinterpret_cast<char *> (&c), 4)
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208 && is.read (reinterpret_cast<char *> (&tmp), 1)))
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209 return false;
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210 if (swap)
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211 {
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212 swap_bytes<4> (&r);
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213 swap_bytes<4> (&c);
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214 }
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215
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216 ComplexDiagMatrix m (r, c);
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217 Complex *im = m.fortran_vec ();
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218 octave_idx_type len = m.length ();
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219 read_doubles (is, reinterpret_cast<double *> (im),
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220 static_cast<save_type> (tmp), 2 * len, swap, fmt);
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221 if (error_state || ! is)
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222 return false;
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223 matrix = m;
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224
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225 return true;
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226 }
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227
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228 bool
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229 octave_complex_diag_matrix::chk_valid_scalar (const octave_value& val,
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230 Complex& x) const
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231 {
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232 bool retval = val.is_complex_scalar () || val.is_real_scalar ();
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233 if (retval)
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234 x = val.complex_value ();
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235 return retval;
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236 }
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237
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238 /*
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239
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240 %% bug #36368
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241 %!assert (diag ([1+i, 1-i])^2 , diag ([2i, -2i]), 4*eps);
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242
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243 */