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annotate src/ov-float.cc @ 14770:cb85e836d035

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New function: erfcinv (bug #36607)
author Axel Mathéi <axel.mathei@gmail.com>
date Thu, 14 Jun 2012 23:31:59 +0200
parents 13cc11418393
children
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1 /*
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2
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3 Copyright (C) 1996-2012 John W. Eaton
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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 "data-conv.h"
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30 #include "mach-info.h"
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31 #include "lo-specfun.h"
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32 #include "lo-mappers.h"
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33
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34 #include "defun.h"
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35 #include "gripes.h"
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36 #include "oct-obj.h"
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37 #include "oct-stream.h"
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38 #include "ov-scalar.h"
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39 #include "ov-float.h"
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40 #include "ov-base.h"
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41 #include "ov-base-scalar.h"
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42 #include "ov-base-scalar.cc"
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43 #include "ov-flt-re-mat.h"
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44 #include "ov-typeinfo.h"
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45 #include "pr-output.h"
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46 #include "xdiv.h"
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47 #include "xpow.h"
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48 #include "ops.h"
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49
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50 #include "ls-oct-ascii.h"
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51 #include "ls-hdf5.h"
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52
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53 template class octave_base_scalar<float>;
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54
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55 DEFINE_OCTAVE_ALLOCATOR (octave_float_scalar);
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56
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57 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_float_scalar, "float scalar", "single");
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58
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59 octave_value
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60 octave_float_scalar::do_index_op (const octave_value_list& idx, bool resize_ok)
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61 {
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62 // FIXME -- this doesn't solve the problem of
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63 //
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64 // a = 1; a([1,1], [1,1], [1,1])
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65 //
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66 // and similar constructions. Hmm...
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67
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68 // FIXME -- using this constructor avoids narrowing the
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69 // 1x1 matrix back to a scalar value. Need a better solution
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70 // to this problem.
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71
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72 octave_value tmp (new octave_float_matrix (float_matrix_value ()));
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73
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74 return tmp.do_index_op (idx, resize_ok);
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75 }
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76
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77 octave_value
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78 octave_float_scalar::resize (const dim_vector& dv, bool fill) const
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79 {
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80 if (fill)
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81 {
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82 FloatNDArray retval (dv, 0);
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83
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84 if (dv.numel ())
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85 retval(0) = scalar;
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86
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87 return retval;
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88 }
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89 else
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90 {
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91 FloatNDArray retval (dv);
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92
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93 if (dv.numel ())
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94 retval(0) = scalar;
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95
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96 return retval;
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97 }
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98 }
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99
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100 octave_value
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101 octave_float_scalar::diag (octave_idx_type m, octave_idx_type n) const
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102 {
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103 return FloatDiagMatrix (Array<float> (dim_vector (1, 1), scalar), m, n);
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104 }
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105
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106 octave_value
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107 octave_float_scalar::convert_to_str_internal (bool, bool, char type) const
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108 {
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109 octave_value retval;
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110
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111 if (xisnan (scalar))
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112 gripe_nan_to_character_conversion ();
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113 else
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114 {
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115 int ival = NINT (scalar);
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116
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117 if (ival < 0 || ival > UCHAR_MAX)
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118 {
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119 // FIXME -- is there something better we could do?
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120
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121 ival = 0;
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122
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123 ::warning ("range error for conversion to character value");
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124 }
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125
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126 retval = octave_value (std::string (1, static_cast<char> (ival)), type);
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127 }
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128
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129 return retval;
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130 }
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131
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132 bool
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133 octave_float_scalar::save_ascii (std::ostream& os)
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134 {
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135 float d = float_value ();
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136
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137 octave_write_float (os, d);
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138
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139 os << "\n";
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140
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141 return true;
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142 }
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143
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144 bool
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145 octave_float_scalar::load_ascii (std::istream& is)
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146 {
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147 scalar = octave_read_value<float> (is);
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148 if (!is)
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149 {
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150 error ("load: failed to load scalar constant");
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151 return false;
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152 }
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153
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154 return true;
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155 }
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156
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157 bool
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158 octave_float_scalar::save_binary (std::ostream& os, bool& /* save_as_floats */)
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159 {
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160 char tmp = LS_FLOAT;
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161 os.write (reinterpret_cast<char *> (&tmp), 1);
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162 float dtmp = float_value ();
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163 os.write (reinterpret_cast<char *> (&dtmp), 4);
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164
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165 return true;
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166 }
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167
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168 bool
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169 octave_float_scalar::load_binary (std::istream& is, bool swap,
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170 oct_mach_info::float_format fmt)
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171 {
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172 char tmp;
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173 if (! is.read (reinterpret_cast<char *> (&tmp), 1))
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174 return false;
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175
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176 float dtmp;
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177 read_floats (is, &dtmp, static_cast<save_type> (tmp), 1, swap, fmt);
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178 if (error_state || ! is)
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179 return false;
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180
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181 scalar = dtmp;
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182 return true;
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183 }
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184
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185 #if defined (HAVE_HDF5)
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186
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187 bool
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188 octave_float_scalar::save_hdf5 (hid_t loc_id, const char *name,
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189 bool /* save_as_floats */)
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190 {
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191 hsize_t dimens[3];
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192 hid_t space_hid = -1, data_hid = -1;
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193 bool retval = true;
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194
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195 space_hid = H5Screate_simple (0, dimens, 0);
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196 if (space_hid < 0) return false;
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197 #if HAVE_HDF5_18
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198 data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_FLOAT, space_hid,
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199 H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
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200 #else
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201 data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_FLOAT, space_hid,
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202 H5P_DEFAULT);
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203 #endif
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204 if (data_hid < 0)
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205 {
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206 H5Sclose (space_hid);
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207 return false;
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208 }
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209
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210 float tmp = float_value ();
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211 retval = H5Dwrite (data_hid, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL,
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212 H5P_DEFAULT, &tmp) >= 0;
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213
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214 H5Dclose (data_hid);
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215 H5Sclose (space_hid);
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216
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217 return retval;
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218 }
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219
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220 bool
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221 octave_float_scalar::load_hdf5 (hid_t loc_id, const char *name)
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222 {
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223 #if HAVE_HDF5_18
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224 hid_t data_hid = H5Dopen (loc_id, name, H5P_DEFAULT);
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225 #else
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226 hid_t data_hid = H5Dopen (loc_id, name);
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227 #endif
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228 hid_t space_id = H5Dget_space (data_hid);
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229
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230 hsize_t rank = H5Sget_simple_extent_ndims (space_id);
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231
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232 if (rank != 0)
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233 {
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234 H5Dclose (data_hid);
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235 return false;
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236 }
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237
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238 float dtmp;
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239 if (H5Dread (data_hid, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL,
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240 H5P_DEFAULT, &dtmp) < 0)
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241 {
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242 H5Dclose (data_hid);
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243 return false;
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244 }
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245
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246 scalar = dtmp;
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247
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248 H5Dclose (data_hid);
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249
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250 return true;
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251 }
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252
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253 #endif
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254
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255 mxArray *
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256 octave_float_scalar::as_mxArray (void) const
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257 {
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258 mxArray *retval = new mxArray (mxSINGLE_CLASS, 1, 1, mxREAL);
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259
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260 float *pr = static_cast<float *> (retval->get_data ());
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261
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262 pr[0] = scalar;
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263
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264 return retval;
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265 }
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266
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267 octave_value
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268 octave_float_scalar::map (unary_mapper_t umap) const
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269 {
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270 switch (umap)
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271 {
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272 case umap_imag:
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273 return 0.0f;
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274
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275 case umap_real:
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276 case umap_conj:
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277 return scalar;
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278
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279 #define SCALAR_MAPPER(UMAP, FCN) \
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280 case umap_ ## UMAP: \
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281 return octave_value (FCN (scalar))
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282
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283 SCALAR_MAPPER (abs, ::fabsf);
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284 SCALAR_MAPPER (acos, rc_acos);
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285 SCALAR_MAPPER (acosh, rc_acosh);
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286 SCALAR_MAPPER (angle, ::arg);
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287 SCALAR_MAPPER (arg, ::arg);
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288 SCALAR_MAPPER (asin, rc_asin);
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289 SCALAR_MAPPER (asinh, ::asinhf);
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290 SCALAR_MAPPER (atan, ::atanf);
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291 SCALAR_MAPPER (atanh, rc_atanh);
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292 SCALAR_MAPPER (erf, ::erff);
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293 SCALAR_MAPPER (erfinv, ::erfinv);
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294 SCALAR_MAPPER (erfcinv, ::erfcinv);
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295 SCALAR_MAPPER (erfc, ::erfcf);
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296 SCALAR_MAPPER (erfcx, ::erfcx);
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297 SCALAR_MAPPER (gamma, xgamma);
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298 SCALAR_MAPPER (lgamma, rc_lgamma);
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299 SCALAR_MAPPER (cbrt, ::cbrtf);
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300 SCALAR_MAPPER (ceil, ::ceilf);
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301 SCALAR_MAPPER (cos, ::cosf);
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302 SCALAR_MAPPER (cosh, ::coshf);
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303 SCALAR_MAPPER (exp, ::expf);
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304 SCALAR_MAPPER (expm1, ::expm1f);
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305 SCALAR_MAPPER (fix, ::fix);
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306 SCALAR_MAPPER (floor, ::floorf);
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307 SCALAR_MAPPER (log, rc_log);
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308 SCALAR_MAPPER (log2, rc_log2);
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309 SCALAR_MAPPER (log10, rc_log10);
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310 SCALAR_MAPPER (log1p, rc_log1p);
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311 SCALAR_MAPPER (round, xround);
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312 SCALAR_MAPPER (roundb, xroundb);
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313 SCALAR_MAPPER (signum, ::signum);
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314 SCALAR_MAPPER (sin, ::sinf);
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315 SCALAR_MAPPER (sinh, ::sinhf);
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316 SCALAR_MAPPER (sqrt, rc_sqrt);
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317 SCALAR_MAPPER (tan, ::tanf);
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318 SCALAR_MAPPER (tanh, ::tanhf);
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319 SCALAR_MAPPER (finite, xfinite);
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320 SCALAR_MAPPER (isinf, xisinf);
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321 SCALAR_MAPPER (isna, octave_is_NA);
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322 SCALAR_MAPPER (isnan, xisnan);
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323
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324 default:
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325 return octave_base_value::map (umap);
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326 }
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327 }
10670
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328
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329 bool
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330 octave_float_scalar::fast_elem_insert_self (void *where, builtin_type_t btyp) const
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331 {
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332
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333 // Support inline real->complex conversion.
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334 if (btyp == btyp_float)
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335 {
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336 *(reinterpret_cast<float *>(where)) = scalar;
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337 return true;
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338 }
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339 else if (btyp == btyp_float_complex)
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340 {
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341 *(reinterpret_cast<FloatComplex *>(where)) = scalar;
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342 return true;
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343 }
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344 else
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345 return false;
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346 }