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update formatting of copyright notices * Use <https://octave.org/copyright/> instead of <https://octave.org/COPYRIGHT.html/>. * For consistency with other comments in the Octave sources, use C++-style comments for copyright blocks in C and C++ files. * Use delimiters above and below copyright blocks that are appropriate for the language used in the file. * Eliminate extra spacing inside copyright blocks. * lex.ll (looks_like_copyright): Also allow newlines and carriage returns before the word "Copyright". * scripts/mk-doc.pl (gethelp): Also skip empty comment lines. * bp-table.cc, type.m: Adjust tests.
author John W. Eaton <jwe@octave.org>
date Wed, 08 Jan 2020 11:59:41 -0500
parents 1891570abac8
children 0a5b15007766
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27923
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2020 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_lo_ieee_h)
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27 #define octave_lo_ieee_h 1
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28
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29 #include <cmath>
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30
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31 #include "octave-config.h"
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32
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33 #if defined (__cplusplus)
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34 extern "C" {
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35 #endif
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36
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37 /* Octave's idea of infinity. */
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38 #define octave_Inf (lo_ieee_inf_value ())
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39
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40 /* Octave's idea of a missing value. */
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41 #define octave_NA (lo_ieee_na_value ())
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42
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43 /* Octave's idea of not a number. */
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44 #define octave_NaN (lo_ieee_nan_value ())
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45
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46 /* Octave's idea of infinity. */
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47 #define octave_Float_Inf (lo_ieee_float_inf_value ())
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48
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49 /* Octave's idea of a missing value. */
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50 #define octave_Float_NA (lo_ieee_float_na_value ())
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51
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52 /* Octave's idea of not a number. */
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53 #define octave_Float_NaN (lo_ieee_float_nan_value ())
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54
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55 /* FIXME: This code assumes that a double has twice the
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56 number of bits as an int */
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57
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58 typedef union
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59 {
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60 double value;
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61 unsigned int word[2];
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62 } lo_ieee_double;
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63
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64 typedef union
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65 {
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66 float value;
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67 unsigned int word;
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68 } lo_ieee_float;
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69
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70 #define LO_IEEE_NA_HW_OLD 0x7ff00000
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71 #define LO_IEEE_NA_LW_OLD 1954
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72 #define LO_IEEE_NA_HW 0x7FF840F4
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73 #define LO_IEEE_NA_LW 0x40000000
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74 #define LO_IEEE_NA_FLOAT 0x7FC207A2
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75
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76 extern OCTAVE_API void octave_ieee_init (void);
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77
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78 inline int __lo_ieee_isnan (double x) { return std::isnan (x); }
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79 inline int __lo_ieee_finite (double x) { return std::isfinite (x); }
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80 inline int __lo_ieee_isinf (double x) { return std::isinf (x); }
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82 extern OCTAVE_API int __lo_ieee_is_NA (double);
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83 extern OCTAVE_API int __lo_ieee_is_old_NA (double);
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84 extern OCTAVE_API double __lo_ieee_replace_old_NA (double);
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85
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86 extern OCTAVE_API double lo_ieee_inf_value (void);
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87 extern OCTAVE_API double lo_ieee_na_value (void);
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88 extern OCTAVE_API double lo_ieee_nan_value (void);
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89
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90 inline int __lo_ieee_signbit (double x) { return std::signbit (x); }
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91
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92 inline int __lo_ieee_float_isnan (float x) { return std::isnan (x); }
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93 inline int __lo_ieee_float_finite (float x) { return std::isfinite (x); }
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94 inline int __lo_ieee_float_isinf (float x) { return std::isinf (x); }
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95
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96 extern OCTAVE_API int __lo_ieee_float_is_NA (float);
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97
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98 extern OCTAVE_API float lo_ieee_float_inf_value (void);
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99 extern OCTAVE_API float lo_ieee_float_na_value (void);
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100 extern OCTAVE_API float lo_ieee_float_nan_value (void);
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101
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102 inline int __lo_ieee_float_signbit (float x) { return std::signbit (x); }
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103
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104 #if defined (__cplusplus)
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105 }
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106 #endif
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107
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108 #define lo_ieee_isnan(x) \
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109 (sizeof (x) == sizeof (float) \
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110 ? __lo_ieee_float_isnan (x) : __lo_ieee_isnan (x))
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111
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112 #define lo_ieee_finite(x) \
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113 (sizeof (x) == sizeof (float) \
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114 ? __lo_ieee_float_finite (x) : __lo_ieee_finite (x))
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115
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116 #define lo_ieee_isinf(x) \
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117 (sizeof (x) == sizeof (float) \
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118 ? __lo_ieee_float_isinf (x) : __lo_ieee_isinf (x))
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119
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120 #define lo_ieee_is_NA(x) \
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121 (sizeof (x) == sizeof (float) \
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122 ? __lo_ieee_float_is_NA (x) : __lo_ieee_is_NA (x))
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123
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124 #define lo_ieee_is_NaN_or_NA(x) \
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125 (sizeof (x) == sizeof (float) \
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126 ? __lo_ieee_float_is_NaN_or_NA (x) : __lo_ieee_is_NaN_or_NA (x))
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127
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128 #define lo_ieee_signbit(x) \
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129 (sizeof (x) == sizeof (float) \
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130 ? __lo_ieee_float_signbit (x) : __lo_ieee_signbit (x))
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131
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132 #if defined (__cplusplus)
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133
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134 namespace octave
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135 {
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136 template <typename T>
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137 struct numeric_limits
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138 {
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139 static T NA (void) { return static_cast<T> (0); }
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140 static T NaN (void) { return static_cast<T> (0); }
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141 static T Inf (void) { return static_cast<T> (0); }
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142 };
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143
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144 template <>
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145 struct numeric_limits<double>
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146 {
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147 static double NA (void) { return octave_NA; }
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148 static double NaN (void) { return octave_NaN; }
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149 static double Inf (void) { return octave_Inf; }
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150 };
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151
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152 template <>
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153 struct numeric_limits<float>
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154 {
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155 static float NA (void) { return octave_Float_NA; }
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156 static float NaN (void) { return octave_Float_NaN; }
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157 static float Inf (void) { return octave_Float_Inf; }
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158 };
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159 }
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160
1967
4cb6aaa0f2c7 [project @ 1996-02-17 02:54:24 by jwe]
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161 #endif
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162
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163 #endif