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annotate liboctave/numeric/lo-mappers.cc @ 21231:5f318c8ec634

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eliminate feature tests from lo-specfun.h * lo-specfun.h, lo-specfun.cc (xacosh, xasinh, xatanh, xerf, xerfc xexpm1, xlog1p, xcbrt): Rename to have 'x' prefix. Conditionally define in .cc file. Change all uses Move complex versions of acosh, asinh, and atanh functions here.
author John W. Eaton <jwe@octave.org>
date Tue, 09 Feb 2016 04:15:50 -0500
parents f7121e111991
children b8cf410b5c88
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1 /*
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2
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3 Copyright (C) 1996-2015 John W. Eaton
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4 Copyright (C) 2010 VZLU Prague
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 # include <config.h>
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26 #endif
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27
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28 #include <cfloat>
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29
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30 #include "lo-error.h"
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31 #include "lo-ieee.h"
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32 #include "lo-mappers.h"
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33 #include "lo-math.h"
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34 #include "lo-specfun.h"
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35 #include "lo-utils.h"
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36 #include "oct-cmplx.h"
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37
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38 #include "f77-fcn.h"
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39
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40 // double -> double mappers.
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41
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42 // Both xtrunc and xround belong here so we can keep gnulib:: out of
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43 // lo-mappers.h.
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44
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45 double
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46 xtrunc (double x)
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47 {
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48 return gnulib::trunc (x);
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49 }
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50
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51 double
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52 xcopysign (double x, double y)
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53 {
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54 return gnulib::copysign (x, y);
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55 }
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56
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57 double xfloor (double x)
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58 {
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59 return gnulib::floor (x);
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60 }
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61
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62 double
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63 xround (double x)
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64 {
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65 return gnulib::round (x);
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66 }
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67
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68 double
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69 xroundb (double x)
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70 {
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71 double t = xround (x);
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72
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73 if (fabs (x - t) == 0.5)
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74 t = 2 * xtrunc (0.5 * t);
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75
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76 return t;
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77 }
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78
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79 double
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80 signum (double x)
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81 {
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82 double tmp = 0.0;
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83
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84 if (x < 0.0)
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85 tmp = -1.0;
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86 else if (x > 0.0)
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87 tmp = 1.0;
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88
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89 return xisnan (x) ? octave_NaN : tmp;
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90 }
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91
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92 double
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93 xlog2 (double x)
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94 {
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95 return gnulib::log2 (x);
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96 }
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97
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98 Complex
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99 xlog2 (const Complex& x)
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100 {
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101 #if defined (M_LN2)
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102 static double ln2 = M_LN2;
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103 #else
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104 static double ln2 = gnulib::log (2);
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105 #endif
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106
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107 return std::log (x) / ln2;
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108 }
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109
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110 double
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111 xexp2 (double x)
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112 {
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113 #if defined (HAVE_EXP2)
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114 return exp2 (x);
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115 #else
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116 # if defined (M_LN2)
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117 static double ln2 = M_LN2;
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118 #else
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119 static double ln2 = gnulib::log (2);
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120 #endif
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121
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122 return exp (x * ln2);
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123 #endif
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124 }
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125
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126 double
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127 xlog2 (double x, int& exp)
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128 {
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129 return gnulib::frexp (x, &exp);
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130 }
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131
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132 Complex
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133 xlog2 (const Complex& x, int& exp)
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134 {
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135 double ax = std::abs (x);
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136 double lax = xlog2 (ax, exp);
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137 return (ax != lax) ? (x / ax) * lax : x;
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138 }
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139
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140 // double -> bool mappers.
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141
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142 #if ! defined (HAVE_CMATH_ISNAN)
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143 bool
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144 xisnan (double x)
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145 {
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146 return lo_ieee_isnan (x);
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147 }
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148 #endif
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149
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150 #if ! defined (HAVE_CMATH_ISFINITE)
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151 bool
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152 xfinite (double x)
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153 {
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154 return lo_ieee_finite (x);
1967
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155 }
8998
a48fba01e4ac optimize isnan/isinf/isfinite mappers
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156 #endif
1967
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157
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158 #if ! defined (HAVE_CMATH_ISINF)
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159 bool
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160 xisinf (double x)
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161 {
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162 return lo_ieee_isinf (x);
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163 }
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parents: 8920
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164 #endif
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165
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166 bool
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167 octave_is_NA (double x)
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168 {
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169 return lo_ieee_is_NA (x);
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170 }
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171
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172 // (double, double) -> double mappers.
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173
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174 // complex -> complex mappers.
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175
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176 Complex
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177 acos (const Complex& x)
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178 {
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179 static Complex i (0, 1);
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180
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181 Complex tmp;
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182
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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183 if (imag (x) == 0.0)
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184 {
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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185 // If the imaginary part of X is 0, then avoid generating an
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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186 // imaginary part of -0 for the expression 1-x*x.
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187 // This effectively chooses the same phase of the branch cut as Matlab.
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188 double xr = real (x);
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189 tmp = Complex (1.0 - xr*xr);
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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190 }
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
191 else
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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192 tmp = 1.0 - x*x;
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193
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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194 return -i * log (x + i * sqrt (tmp));
1967
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195 }
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196
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197 Complex
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198 asin (const Complex& x)
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199 {
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200 static Complex i (0, 1);
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201
19242
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diff changeset
202 Complex tmp;
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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parents: 18928
diff changeset
203
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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parents: 18928
diff changeset
204 if (imag (x) == 0.0)
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parents: 18928
diff changeset
205 {
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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parents: 18928
diff changeset
206 // If the imaginary part of X is 0, then avoid generating an
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
207 // imaginary part of -0 for the expression 1-x*x.
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
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parents: 18928
diff changeset
208 // This effectively chooses the same phase of the branch cut as Matlab.
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
209 double xr = real (x);
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parents: 18928
diff changeset
210 tmp = Complex (1.0 - xr*xr);
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
211 }
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
212 else
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
213 tmp = 1.0 - x*x;
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
214
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
215 return -i * log (i*x + sqrt (tmp));
1967
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216 }
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217
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218 Complex
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219 atan (const Complex& x)
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220 {
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diff changeset
221 static Complex i (0, 1);
3056
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diff changeset
222
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diff changeset
223 return i * log ((i + x) / (i - x)) / 2.0;
1967
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224 }
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225
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226 // complex -> bool mappers.
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227
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228 bool
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229 octave_is_NA (const Complex& x)
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diff changeset
230 {
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diff changeset
231 return (octave_is_NA (real (x)) || octave_is_NA (imag (x)));
cfb762dc9259 [project @ 2002-08-09 06:32:15 by jwe]
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diff changeset
232 }
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diff changeset
233
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jwe
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diff changeset
234 bool
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diff changeset
235 octave_is_NaN_or_NA (const Complex& x)
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parents: 3873
diff changeset
236 {
5389
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diff changeset
237 return (xisnan (real (x)) || xisnan (imag (x)));
4025
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diff changeset
238 }
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diff changeset
239
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diff changeset
240 // (complex, complex) -> complex mappers.
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diff changeset
241
17769
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents: 17744
diff changeset
242 // FIXME: need to handle NA too?
4025
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243
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diff changeset
244 Complex
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diff changeset
245 xmin (const Complex& x, const Complex& y)
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diff changeset
246 {
3757
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diff changeset
247 return abs (x) <= abs (y) ? x : (xisnan (x) ? x : y);
3248
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diff changeset
248 }
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jwe
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diff changeset
249
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diff changeset
250 Complex
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jwe
parents: 3206
diff changeset
251 xmax (const Complex& x, const Complex& y)
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jwe
parents: 3206
diff changeset
252 {
3757
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diff changeset
253 return abs (x) >= abs (y) ? x : (xisnan (x) ? x : y);
3248
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diff changeset
254 }
68259f410026 [project @ 1999-07-13 03:34:54 by jwe]
jwe
parents: 3206
diff changeset
255
7789
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David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
256
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
257 // float -> float mappers.
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
258
11237
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
259 // Both xtrunc and xround belong here so we can keep gnulib:: out of
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
260 // lo-mappers.h.
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
261
110e570e5f8d keep gnulib out of lo-mappers.h
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parents: 11212
diff changeset
262 float
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
263 xtrunc (float x)
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
264 {
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
265 return gnulib::truncf (x);
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
266 }
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
267
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
268 float
13737
30414ff19d5e Use copysignf module from gnulib.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 11586
diff changeset
269 xcopysign (float x, float y)
30414ff19d5e Use copysignf module from gnulib.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 11586
diff changeset
270 {
30414ff19d5e Use copysignf module from gnulib.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 11586
diff changeset
271 return gnulib::copysignf (x, y);
30414ff19d5e Use copysignf module from gnulib.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 11586
diff changeset
272 }
30414ff19d5e Use copysignf module from gnulib.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 11586
diff changeset
273
15409
c898dbe14e1d build: Update imported module list from gnulib.
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parents: 15271
diff changeset
274 float xfloor (float x)
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diff changeset
275 {
c898dbe14e1d build: Update imported module list from gnulib.
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diff changeset
276 return gnulib::floorf (x);
c898dbe14e1d build: Update imported module list from gnulib.
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parents: 15271
diff changeset
277 }
c898dbe14e1d build: Update imported module list from gnulib.
Rik <rik@octave.org>
parents: 15271
diff changeset
278
13737
30414ff19d5e Use copysignf module from gnulib.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 11586
diff changeset
279 float
11237
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John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
280 xround (float x)
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parents: 11212
diff changeset
281 {
15409
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parents: 15271
diff changeset
282 return gnulib::roundf (x);
11237
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John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
283 }
110e570e5f8d keep gnulib out of lo-mappers.h
John W. Eaton <jwe@octave.org>
parents: 11212
diff changeset
284
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11525
diff changeset
285 float
7789
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David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
286 xroundb (float x)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
287 {
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
288 float t = xround (x);
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parents: 7740
diff changeset
289
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
290 if (fabsf (x - t) == 0.5)
7789
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diff changeset
291 t = 2 * xtrunc (0.5 * t);
82be108cc558 First attempt at single precision tyeps
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diff changeset
292
82be108cc558 First attempt at single precision tyeps
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diff changeset
293 return t;
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diff changeset
294 }
82be108cc558 First attempt at single precision tyeps
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295
82be108cc558 First attempt at single precision tyeps
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diff changeset
296 float
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
297 signum (float x)
82be108cc558 First attempt at single precision tyeps
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diff changeset
298 {
82be108cc558 First attempt at single precision tyeps
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diff changeset
299 float tmp = 0.0;
82be108cc558 First attempt at single precision tyeps
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diff changeset
300
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
301 if (x < 0.0)
82be108cc558 First attempt at single precision tyeps
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diff changeset
302 tmp = -1.0;
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
303 else if (x > 0.0)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
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diff changeset
304 tmp = 1.0;
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305
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306 return xisnan (x) ? octave_Float_NaN : tmp;
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307 }
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308
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309 float
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diff changeset
310 xlog2 (float x)
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diff changeset
311 {
18847
ff4da3c8ed16 use gnulib log2 modules (bug #42583)
John W. Eaton <jwe@octave.org>
parents: 17843
diff changeset
312 return gnulib::log2f (x);
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313 }
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314
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315 FloatComplex
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diff changeset
316 xlog2 (const FloatComplex& x)
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317 {
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diff changeset
318 #if defined (M_LN2)
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319 static float ln2 = M_LN2;
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320 #else
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321 static float ln2 = log (2);
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322 #endif
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323
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324 return std::log (x) / ln2;
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325 }
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326
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327 float
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328 xexp2 (float x)
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329 {
15452
4d960b078272 build: Remove unnecessary AC_CHECK_FUNCS calls.
Rik <rik@octave.org>
parents: 15409
diff changeset
330 #if defined (HAVE_EXP2F)
4d960b078272 build: Remove unnecessary AC_CHECK_FUNCS calls.
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parents: 15409
diff changeset
331 return exp2f (x);
4d960b078272 build: Remove unnecessary AC_CHECK_FUNCS calls.
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332 #elif defined (HAVE_EXP2)
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333 return exp2 (x);
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334 #else
21202
f7121e111991 maint: indent #ifdef blocks in liboctave and src directories.
Rik <rik@octave.org>
parents: 20791
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335 # if defined (M_LN2)
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336 static float ln2 = M_LN2;
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337 #else
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338 static float ln2 = log2 (2);
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339 #endif
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340
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341 return exp (x * ln2);
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342 #endif
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343 }
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344
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345 float
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346 xlog2 (float x, int& exp)
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347 {
17843
573f865aa8c8 use gnulib frexp module
John W. Eaton <jwe@octave.org>
parents: 17769
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348 return gnulib::frexpf (x, &exp);
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349 }
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350
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351 FloatComplex
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352 xlog2 (const FloatComplex& x, int& exp)
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353 {
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354 float ax = std::abs (x);
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355 float lax = xlog2 (ax, exp);
9319
0d9178575dd7 fix log2 with 2 outargs, loosen tests to meet IEEE
Jaroslav Hajek <highegg@gmail.com>
parents: 8998
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356 return (ax != lax) ? (x / ax) * lax : x;
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357 }
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358
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359 // float -> bool mappers.
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360
20791
f7084eae3318 maint: Use Octave coding conventions for #if statements.
Rik <rik@octave.org>
parents: 19739
diff changeset
361 #if ! defined (HAVE_CMATH_ISNANF)
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362 bool
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363 xisnan (float x)
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364 {
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365 return lo_ieee_isnan (x);
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366 }
8998
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
367 #endif
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368
20791
f7084eae3318 maint: Use Octave coding conventions for #if statements.
Rik <rik@octave.org>
parents: 19739
diff changeset
369 #if ! defined (HAVE_CMATH_ISFINITEF)
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370 bool
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371 xfinite (float x)
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372 {
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373 return lo_ieee_finite (x);
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374 }
8998
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
375 #endif
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376
20791
f7084eae3318 maint: Use Octave coding conventions for #if statements.
Rik <rik@octave.org>
parents: 19739
diff changeset
377 #if ! defined (HAVE_CMATH_ISINFF)
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378 bool
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379 xisinf (float x)
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380 {
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381 return lo_ieee_isinf (x);
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382 }
8998
a48fba01e4ac optimize isnan/isinf/isfinite mappers
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
383 #endif
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384
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385 bool
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diff changeset
386 octave_is_NA (float x)
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diff changeset
387 {
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diff changeset
388 return lo_ieee_is_NA (x);
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389 }
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390
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391 // (float, float) -> float mappers.
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392
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393 // complex -> complex mappers.
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394
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diff changeset
395 FloatComplex
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diff changeset
396 acos (const FloatComplex& x)
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diff changeset
397 {
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398 static FloatComplex i (0, 1);
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diff changeset
399
19242
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
400 FloatComplex tmp;
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
401
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
402 if (imag (x) == 0.0f)
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
403 {
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
404 // If the imaginary part of X is 0, then avoid generating an
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
405 // imaginary part of -0 for the expression 1-x*x.
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
406 // This effectively chooses the same phase of the branch cut as Matlab.
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
407 float xr = real (x);
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
408 tmp = FloatComplex (1.0f - xr*xr);
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
409 }
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
410 else
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
411 tmp = 1.0f - x*x;
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
412
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
413 return -i * log (x + i * sqrt (tmp));
7789
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diff changeset
414 }
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parents: 7740
diff changeset
415
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parents: 7740
diff changeset
416 FloatComplex
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parents: 7740
diff changeset
417 asin (const FloatComplex& x)
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parents: 7740
diff changeset
418 {
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diff changeset
419 static FloatComplex i (0, 1);
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parents: 7740
diff changeset
420
19242
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
421 FloatComplex tmp;
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
422
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
423 if (imag (x) == 0.0f)
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
424 {
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
425 // If the imaginary part of X is 0, then avoid generating an
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
426 // imaginary part of -0 for the expression 1-x*x.
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
427 // This effectively chooses the same phase of the branch cut as Matlab.
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
428 float xr = real (x);
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
429 tmp = FloatComplex (1.0f - xr*xr);
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
430 }
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
431 else
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
432 tmp = 1.0f - x*x;
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
433
ba7e42dea4b2 Fix returned phase of asin, acos outside principal branch (bug #43349).
Rik <rik@octave.org>
parents: 18928
diff changeset
434 return -i * log (i*x + sqrt (tmp));
7789
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diff changeset
435 }
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parents: 7740
diff changeset
436
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parents: 7740
diff changeset
437 FloatComplex
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parents: 7740
diff changeset
438 atan (const FloatComplex& x)
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
439 {
82be108cc558 First attempt at single precision tyeps
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diff changeset
440 static FloatComplex i (0, 1);
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
441
19738
9155bab86647 use 0.0f style constants instead of static_cast<float> (0.0)
John W. Eaton <jwe@octave.org>
parents: 19730
diff changeset
442 return i * log ((i + x) / (i - x)) / 2.0f;
7789
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diff changeset
443 }
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diff changeset
444
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diff changeset
445 // complex -> bool mappers.
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diff changeset
446
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parents: 7740
diff changeset
447 bool
82be108cc558 First attempt at single precision tyeps
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diff changeset
448 octave_is_NA (const FloatComplex& x)
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
449 {
82be108cc558 First attempt at single precision tyeps
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diff changeset
450 return (octave_is_NA (real (x)) || octave_is_NA (imag (x)));
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
451 }
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
452
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
453 bool
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
454 octave_is_NaN_or_NA (const FloatComplex& x)
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parents: 7740
diff changeset
455 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
456 return (xisnan (real (x)) || xisnan (imag (x)));
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
457 }
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
458
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
459 // (complex, complex) -> complex mappers.
82be108cc558 First attempt at single precision tyeps
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parents: 7740
diff changeset
460
17769
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents: 17744
diff changeset
461 // FIXME: need to handle NA too?
7789
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diff changeset
462
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
463 FloatComplex
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
464 xmin (const FloatComplex& x, const FloatComplex& y)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
465 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
466 return abs (x) <= abs (y) ? x : (xisnan (x) ? x : y);
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
467 }
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
468
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
469 FloatComplex
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
470 xmax (const FloatComplex& x, const FloatComplex& y)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
471 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
472 return abs (x) >= abs (y) ? x : (xisnan (x) ? x : y);
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
473 }
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7740
diff changeset
474
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
475 Complex
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
476 rc_acos (double x)
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
477 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
478 return fabs (x) > 1.0 ? acos (Complex (x)) : Complex (acos (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
479 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
480
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
481 FloatComplex
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
482 rc_acos (float x)
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
483 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
484 return fabsf (x) > 1.0f ? acos (FloatComplex (x)) : FloatComplex (acosf (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
485 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
486
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
487 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
488 rc_acosh (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
489 {
21231
5f318c8ec634 eliminate feature tests from lo-specfun.h
John W. Eaton <jwe@octave.org>
parents: 21202
diff changeset
490 return x < 1.0 ? xacosh (Complex (x)) : Complex (xacosh (x));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
491 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
492
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
493 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
494 rc_acosh (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
495 {
21231
5f318c8ec634 eliminate feature tests from lo-specfun.h
John W. Eaton <jwe@octave.org>
parents: 21202
diff changeset
496 return x < 1.0f ? xacosh (FloatComplex (x)) : FloatComplex (xacosh (x));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
497 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
498
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
499 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
500 rc_asin (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
501 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
502 return fabs (x) > 1.0 ? asin (Complex (x)) : Complex (asin (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
503 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
504
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
505 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
506 rc_asin (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
507 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
508 return fabsf (x) > 1.0f ? asin (FloatComplex (x)) : FloatComplex (asinf (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
509 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
510
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
511 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
512 rc_atanh (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
513 {
21231
5f318c8ec634 eliminate feature tests from lo-specfun.h
John W. Eaton <jwe@octave.org>
parents: 21202
diff changeset
514 return fabs (x) > 1.0 ? xatanh (Complex (x)) : Complex (xatanh (x));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
515 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
516
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
517 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
518 rc_atanh (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
519 {
21231
5f318c8ec634 eliminate feature tests from lo-specfun.h
John W. Eaton <jwe@octave.org>
parents: 21202
diff changeset
520 return fabsf (x) > 1.0f ? xatanh (FloatComplex (x))
5f318c8ec634 eliminate feature tests from lo-specfun.h
John W. Eaton <jwe@octave.org>
parents: 21202
diff changeset
521 : FloatComplex (xatanh (x));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
522 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
523
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
524 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
525 rc_log (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
526 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
527 const double pi = 3.14159265358979323846;
19375
264ff6bf7475 use gnulib:: namespace for log, logf, localtime, and gmtime
John W. Eaton <jwe@octave.org>
parents: 18847
diff changeset
528 return x < 0.0 ? Complex (gnulib::log (-x), pi) : Complex (gnulib::log (x));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
529 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
530
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
531 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
532 rc_log (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
533 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
534 const float pi = 3.14159265358979323846f;
19375
264ff6bf7475 use gnulib:: namespace for log, logf, localtime, and gmtime
John W. Eaton <jwe@octave.org>
parents: 18847
diff changeset
535 return (x < 0.0f
264ff6bf7475 use gnulib:: namespace for log, logf, localtime, and gmtime
John W. Eaton <jwe@octave.org>
parents: 18847
diff changeset
536 ? FloatComplex (gnulib::logf (-x), pi)
264ff6bf7475 use gnulib:: namespace for log, logf, localtime, and gmtime
John W. Eaton <jwe@octave.org>
parents: 18847
diff changeset
537 : FloatComplex (gnulib::logf (x)));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
538 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
539
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
540 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
541 rc_log2 (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
542 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
543 const double pil2 = 4.53236014182719380962; // = pi / log(2)
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
544 return x < 0.0 ? Complex (xlog2 (-x), pil2) : Complex (xlog2 (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
545 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
546
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
547 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
548 rc_log2 (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
549 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
550 const float pil2 = 4.53236014182719380962f; // = pi / log(2)
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
551 return x < 0.0f ? FloatComplex (xlog2 (-x), pil2) : FloatComplex (xlog2 (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
552 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
553
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
554 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
555 rc_log10 (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
556 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
557 const double pil10 = 1.36437635384184134748; // = pi / log(10)
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
558 return x < 0.0 ? Complex (log10 (-x), pil10) : Complex (log10 (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
559 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
560
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
561 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
562 rc_log10 (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
563 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
564 const float pil10 = 1.36437635384184134748f; // = pi / log(10)
17769
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents: 17744
diff changeset
565 return x < 0.0f ? FloatComplex (log10 (-x), pil10)
49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents: 17744
diff changeset
566 : FloatComplex (log10f (x));
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
567 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
568
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
569 Complex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
570 rc_sqrt (double x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
571 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
572 return x < 0.0 ? Complex (0.0, sqrt (-x)) : Complex (sqrt (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
573 }
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
574
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
575 FloatComplex
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
576 rc_sqrt (float x)
9812
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
577 {
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
578 return x < 0.0f ? FloatComplex (0.0f, sqrtf (-x)) : FloatComplex (sqrtf (x));
f80c566bc751 improve unary mapper system
Jaroslav Hajek <highegg@gmail.com>
parents: 9319
diff changeset
579 }
11010
9478b216752e simplify more array tests
Jaroslav Hajek <highegg@gmail.com>
parents: 10521
diff changeset
580
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
581 bool
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
582 xnegative_sign (double x)
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
583 {
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
584 return __lo_ieee_signbit (x);
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
585 }
11010
9478b216752e simplify more array tests
Jaroslav Hajek <highegg@gmail.com>
parents: 10521
diff changeset
586
11212
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
587 bool
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
588 xnegative_sign (float x)
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
589 {
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
590 return __lo_ieee_float_signbit (x);
ce27d6f4e134 use templates and inline for more lo-mappers functionos
John W. Eaton <jwe@octave.org>
parents: 11211
diff changeset
591 }
11211
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
592
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
593 // Convert X to the nearest integer value. Should not pass NaN to
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
594 // this function.
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
595
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
596 // Sometimes you need a large integer, but not always.
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
597
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
598 octave_idx_type
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
599 NINTbig (double x)
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
600 {
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
601 if (x > std::numeric_limits<octave_idx_type>::max ())
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
602 return std::numeric_limits<octave_idx_type>::max ();
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
603 else if (x < std::numeric_limits<octave_idx_type>::min ())
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
604 return std::numeric_limits<octave_idx_type>::min ();
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
605 else
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
606 return static_cast<octave_idx_type> ((x > 0) ? (x + 0.5) : (x - 0.5));
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
diff changeset
607 }
2554b4a0806e use templates for some lo-mappers functions
John W. Eaton <jwe@octave.org>
parents: 11209
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608
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John W. Eaton <jwe@octave.org>
parents: 11209
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609 octave_idx_type
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parents: 11209
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610 NINTbig (float x)
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parents: 11209
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611 {
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parents: 11209
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612 if (x > std::numeric_limits<octave_idx_type>::max ())
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613 return std::numeric_limits<octave_idx_type>::max ();
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parents: 11209
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614 else if (x < std::numeric_limits<octave_idx_type>::min ())
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parents: 11209
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615 return std::numeric_limits<octave_idx_type>::min ();
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616 else
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617 return static_cast<octave_idx_type> ((x > 0) ? (x + 0.5) : (x - 0.5));
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618 }
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619
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620 int
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621 NINT (double x)
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parents: 11209
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622 {
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parents: 11209
diff changeset
623 if (x > std::numeric_limits<int>::max ())
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diff changeset
624 return std::numeric_limits<int>::max ();
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parents: 11209
diff changeset
625 else if (x < std::numeric_limits<int>::min ())
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parents: 11209
diff changeset
626 return std::numeric_limits<int>::min ();
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627 else
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parents: 11209
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628 return static_cast<int> ((x > 0) ? (x + 0.5) : (x - 0.5));
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parents: 11209
diff changeset
629 }
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diff changeset
630
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parents: 11209
diff changeset
631 int
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632 NINT (float x)
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parents: 11209
diff changeset
633 {
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diff changeset
634 if (x > std::numeric_limits<int>::max ())
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diff changeset
635 return std::numeric_limits<int>::max ();
2554b4a0806e use templates for some lo-mappers functions
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parents: 11209
diff changeset
636 else if (x < std::numeric_limits<int>::min ())
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parents: 11209
diff changeset
637 return std::numeric_limits<int>::min ();
2554b4a0806e use templates for some lo-mappers functions
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parents: 11209
diff changeset
638 else
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diff changeset
639 return static_cast<int> ((x > 0) ? (x + 0.5) : (x - 0.5));
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640 }