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annotate libinterp/octave-value/ov-float.cc @ 18691:336e64e9e6e3 draft

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Fully int8 type support
author LYH <lyh.kernel@gmail.com>
date Fri, 21 Mar 2014 14:59:39 -0400
parents b7d3e1f762e1
children 76478d2da117
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1 /*
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2
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3 Copyright (C) 1996-2013 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 "mxarray.h"
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37 #include "oct-obj.h"
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38 #include "oct-stream.h"
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39 #include "ov-scalar.h"
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40 #include "ov-float.h"
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41 #include "ov-base.h"
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42 #include "ov-base-scalar.h"
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43 #include "ov-base-scalar.cc"
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44 #include "ov-flt-re-mat.h"
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45 #include "ov-typeinfo.h"
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46 #include "pr-output.h"
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47 #include "xdiv.h"
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48 #include "xpow.h"
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49 #include "ops.h"
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50
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51 #include "ls-oct-ascii.h"
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52 #include "ls-hdf5.h"
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53
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54 template class octave_base_scalar<float>;
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55
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56 DEFINE_OCTAVE_ALLOCATOR (octave_float_scalar);
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57
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58 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_float_scalar, "float scalar",
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59 "single");
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60
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61 octave_value
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62 octave_float_scalar::do_index_op (const octave_value_list& idx, bool resize_ok)
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63 {
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64 // FIXME: this doesn't solve the problem of
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65 //
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66 // a = 1; a([1,1], [1,1], [1,1])
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67 //
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68 // and similar constructions. Hmm...
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69
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70 // FIXME: using this constructor avoids narrowing the
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71 // 1x1 matrix back to a scalar value. Need a better solution
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72 // to this problem.
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73
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74 octave_value tmp (new octave_float_matrix (float_matrix_value ()));
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75
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76 return tmp.do_index_op (idx, resize_ok);
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77 }
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78
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79 octave_value
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80 octave_float_scalar::resize (const dim_vector& dv, bool fill) const
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81 {
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82 if (fill)
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83 {
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84 FloatNDArray retval (dv, 0);
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85
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86 if (dv.numel ())
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87 retval(0) = scalar;
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88
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89 return retval;
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90 }
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91 else
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92 {
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93 FloatNDArray retval (dv);
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94
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95 if (dv.numel ())
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96 retval(0) = scalar;
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97
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98 return retval;
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99 }
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100 }
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101
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102 octave_value
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103 octave_float_scalar::diag (octave_idx_type m, octave_idx_type n) const
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104 {
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105 return FloatDiagMatrix (Array<float> (dim_vector (1, 1), scalar), m, n);
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106 }
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107
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108 octave_value
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109 octave_float_scalar::convert_to_str_internal (bool, bool, char type) const
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110 {
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111 octave_value retval;
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112
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113 if (xisnan (scalar))
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114 gripe_nan_to_character_conversion ();
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115 else
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116 {
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117 int ival = NINT (scalar);
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118
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119 if (ival < 0 || ival > std::numeric_limits<unsigned char>::max ())
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120 {
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121 // FIXME: is there something better we could do?
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122
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123 ival = 0;
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124
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125 ::warning ("range error for conversion to character value");
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126 }
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127
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128 retval = octave_value (std::string (1, static_cast<char> (ival)), type);
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129 }
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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 bool
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135 octave_float_scalar::save_ascii (std::ostream& os)
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136 {
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137 float d = float_value ();
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138
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139 octave_write_float (os, d);
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140
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141 os << "\n";
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142
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143 return true;
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144 }
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145
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146 bool
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147 octave_float_scalar::load_ascii (std::istream& is)
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148 {
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149 scalar = octave_read_value<float> (is);
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150 if (!is)
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151 {
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152 error ("load: failed to load scalar constant");
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153 return false;
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154 }
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155
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156 return true;
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157 }
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158
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159 bool
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160 octave_float_scalar::save_binary (std::ostream& os, bool& /* save_as_floats */)
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161 {
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162 char tmp = LS_FLOAT;
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163 os.write (reinterpret_cast<char *> (&tmp), 1);
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164 float dtmp = float_value ();
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165 os.write (reinterpret_cast<char *> (&dtmp), 4);
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166
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167 return true;
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168 }
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169
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170 bool
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171 octave_float_scalar::load_binary (std::istream& is, bool swap,
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172 oct_mach_info::float_format fmt)
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173 {
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174 char tmp;
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175 if (! is.read (reinterpret_cast<char *> (&tmp), 1))
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176 return false;
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177
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178 float dtmp;
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179 read_floats (is, &dtmp, static_cast<save_type> (tmp), 1, swap, fmt);
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180 if (error_state || ! is)
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181 return false;
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182
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183 scalar = dtmp;
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184 return true;
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185 }
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186
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187 #if defined (HAVE_HDF5)
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188
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189 bool
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190 octave_float_scalar::save_hdf5 (hid_t loc_id, const char *name,
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191 bool /* save_as_floats */)
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192 {
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193 hsize_t dimens[3];
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194 hid_t space_hid, data_hid;
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195 space_hid = data_hid = -1;
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196 bool retval = true;
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197
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198 space_hid = H5Screate_simple (0, dimens, 0);
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199 if (space_hid < 0) return false;
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200 #if HAVE_HDF5_18
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201 data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_FLOAT, space_hid,
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202 H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
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203 #else
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204 data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_FLOAT, space_hid,
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205 H5P_DEFAULT);
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206 #endif
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207 if (data_hid < 0)
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208 {
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209 H5Sclose (space_hid);
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210 return false;
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211 }
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212
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213 float tmp = float_value ();
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214 retval = H5Dwrite (data_hid, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL,
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215 H5P_DEFAULT, &tmp) >= 0;
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216
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217 H5Dclose (data_hid);
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218 H5Sclose (space_hid);
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219
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220 return retval;
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221 }
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222
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223 bool
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224 octave_float_scalar::load_hdf5 (hid_t loc_id, const char *name)
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225 {
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226 #if HAVE_HDF5_18
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227 hid_t data_hid = H5Dopen (loc_id, name, H5P_DEFAULT);
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228 #else
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229 hid_t data_hid = H5Dopen (loc_id, name);
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230 #endif
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231 hid_t space_id = H5Dget_space (data_hid);
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232
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233 hsize_t rank = H5Sget_simple_extent_ndims (space_id);
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234
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235 if (rank != 0)
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236 {
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237 H5Dclose (data_hid);
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238 return false;
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239 }
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240
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241 float dtmp;
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242 if (H5Dread (data_hid, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL,
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243 H5P_DEFAULT, &dtmp) < 0)
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244 {
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245 H5Dclose (data_hid);
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246 return false;
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247 }
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248
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249 scalar = dtmp;
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250
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251 H5Dclose (data_hid);
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252
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253 return true;
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254 }
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255
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256 #endif
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257
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258 mxArray *
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259 octave_float_scalar::as_mxArray (void) const
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260 {
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261 mxArray *retval = new mxArray (mxSINGLE_CLASS, 1, 1, mxREAL);
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262
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263 float *pr = static_cast<float *> (retval->get_data ());
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264
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265 pr[0] = scalar;
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266
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267 return retval;
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268 }
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269
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270 octave_value
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271 octave_float_scalar::map (unary_mapper_t umap) const
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272 {
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273 switch (umap)
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274 {
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275 case umap_imag:
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276 return 0.0f;
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277
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278 case umap_real:
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279 case umap_conj:
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280 return scalar;
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281
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282 #define SCALAR_MAPPER(UMAP, FCN) \
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283 case umap_ ## UMAP: \
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284 return octave_value (FCN (scalar))
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285
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286 SCALAR_MAPPER (abs, ::fabsf);
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287 SCALAR_MAPPER (acos, rc_acos);
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288 SCALAR_MAPPER (acosh, rc_acosh);
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289 SCALAR_MAPPER (angle, ::arg);
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290 SCALAR_MAPPER (arg, ::arg);
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291 SCALAR_MAPPER (asin, rc_asin);
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292 SCALAR_MAPPER (asinh, ::asinhf);
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293 SCALAR_MAPPER (atan, ::atanf);
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294 SCALAR_MAPPER (atanh, rc_atanh);
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295 SCALAR_MAPPER (erf, ::erff);
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296 SCALAR_MAPPER (erfinv, ::erfinv);
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297 SCALAR_MAPPER (erfcinv, ::erfcinv);
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298 SCALAR_MAPPER (erfc, ::erfcf);
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299 SCALAR_MAPPER (erfcx, ::erfcx);
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300 SCALAR_MAPPER (erfi, ::erfi);
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301 SCALAR_MAPPER (dawson, ::dawson);
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302 SCALAR_MAPPER (gamma, xgamma);
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303 SCALAR_MAPPER (lgamma, rc_lgamma);
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304 SCALAR_MAPPER (cbrt, ::cbrtf);
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305 SCALAR_MAPPER (ceil, ::ceilf);
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306 SCALAR_MAPPER (cos, ::cosf);
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307 SCALAR_MAPPER (cosh, ::coshf);
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308 SCALAR_MAPPER (exp, ::expf);
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309 SCALAR_MAPPER (expm1, ::expm1f);
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310 SCALAR_MAPPER (fix, ::fix);
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diff changeset
311 SCALAR_MAPPER (floor, gnulib::floorf);
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312 SCALAR_MAPPER (log, rc_log);
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313 SCALAR_MAPPER (log2, rc_log2);
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314 SCALAR_MAPPER (log10, rc_log10);
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315 SCALAR_MAPPER (log1p, rc_log1p);
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316 SCALAR_MAPPER (round, xround);
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317 SCALAR_MAPPER (roundb, xroundb);
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318 SCALAR_MAPPER (signum, ::signum);
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319 SCALAR_MAPPER (sin, ::sinf);
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320 SCALAR_MAPPER (sinh, ::sinhf);
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321 SCALAR_MAPPER (sqrt, rc_sqrt);
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322 SCALAR_MAPPER (tan, ::tanf);
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323 SCALAR_MAPPER (tanh, ::tanhf);
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324 SCALAR_MAPPER (finite, xfinite);
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325 SCALAR_MAPPER (isinf, xisinf);
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326 SCALAR_MAPPER (isna, octave_is_NA);
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327 SCALAR_MAPPER (isnan, xisnan);
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328 SCALAR_MAPPER (xsignbit, xsignbit);
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329
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330 // Special cases for Matlab compatibility.
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331 case umap_xtolower:
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332 case umap_xtoupper:
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333 return scalar;
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334
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335 case umap_xisalnum:
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336 case umap_xisalpha:
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337 case umap_xisascii:
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338 case umap_xiscntrl:
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339 case umap_xisdigit:
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340 case umap_xisgraph:
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341 case umap_xislower:
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342 case umap_xisprint:
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343 case umap_xispunct:
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344 case umap_xisspace:
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345 case umap_xisupper:
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346 case umap_xisxdigit:
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347 case umap_xtoascii:
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348 {
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349 octave_value str_conv = convert_to_str (true, true);
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350 return error_state ? octave_value () : str_conv.map (umap);
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351 }
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352
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353 default:
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354 return octave_base_value::map (umap);
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355 }
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356 }
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357
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358 bool
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359 octave_float_scalar::fast_elem_insert_self (void *where,
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360 builtin_type_t btyp) const
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361 {
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362
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363 // Support inline real->complex conversion.
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364 if (btyp == btyp_float)
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365 {
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366 *(reinterpret_cast<float *>(where)) = scalar;
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367 return true;
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368 }
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369 else if (btyp == btyp_float_complex)
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370 {
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371 *(reinterpret_cast<FloatComplex *>(where)) = scalar;
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372 return true;
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373 }
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374 else
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375 return false;
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376 }