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maint: Update copyright notices for release.
author John W. Eaton <jwe@octave.org>
date Wed, 23 Oct 2013 22:09:27 -0400
parents 7b305b36b87e
children 49a5a4be04a1
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1 // utils.cc
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2 /*
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3
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4 Copyright (C) 1996-2013 John W. Eaton
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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 <cctype>
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29 #include <cerrno>
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30 #include <cstdlib>
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31 #include <cstdio>
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32 #include <cstring>
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33 #include <cfloat>
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34
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35 #include <limits>
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36 #include <string>
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37
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38 #include <sys/types.h>
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39 #include <unistd.h>
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40
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41 #include "quit.h"
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42
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43 #include "lo-error.h"
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44 #include "lo-ieee.h"
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45 #include "lo-mappers.h"
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46 #include "lo-utils.h"
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47
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48 bool xis_int_or_inf_or_nan (double x)
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49 { return xisnan (x) || D_NINT (x) == x; }
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50
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51 bool xis_one_or_zero (double x)
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52 { return x == 0 || x == 1; }
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53
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54 bool xis_zero (double x)
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55 { return x == 0; }
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56
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57 bool xtoo_large_for_float (double x)
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58 {
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59 return (xfinite (x) && fabs (x) > std::numeric_limits<float>::max ());
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60 }
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61
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62 bool xtoo_large_for_float (const Complex& x)
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63 {
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64 return (xtoo_large_for_float (x.real ())
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65 || xtoo_large_for_float (x.imag ()));
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66 }
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67
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68 bool xis_int_or_inf_or_nan (float x)
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69 { return xisnan (x) || D_NINT (x) == x; }
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70
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71 bool xis_one_or_zero (float x)
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72 { return x == 0 || x == 1; }
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73
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74 bool xis_zero (float x)
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75 { return x == 0; }
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76
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77 // Save a string.
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78
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79 char *
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80 strsave (const char *s)
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81 {
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82 if (! s)
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83 return 0;
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84
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85 int len = strlen (s);
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86 char *tmp = new char [len+1];
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87 tmp = strcpy (tmp, s);
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88 return tmp;
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89 }
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90
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91 void
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92 octave_putenv (const std::string& name, const std::string& value)
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93 {
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94 if (gnulib::setenv (name.c_str (), value.c_str (), true) < 0)
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95 (*current_liboctave_error_handler) ("putenv: %s",
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96 gnulib::strerror (errno));
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97 }
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98
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99 std::string
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100 octave_fgets (FILE *f)
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101 {
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102 bool eof;
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103 return octave_fgets (f, eof);
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104 }
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105
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106 std::string
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107 octave_fgets (FILE *f, bool& eof)
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108 {
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109 eof = false;
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110
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111 std::string retval;
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112
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113 int grow_size = 1024;
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114 int max_size = grow_size;
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115
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116 char *buf = static_cast<char *> (gnulib::malloc (max_size));
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117 char *bufptr = buf;
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118 int len = 0;
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119
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120 do
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121 {
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122 if (gnulib::fgets (bufptr, grow_size, f))
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123 {
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124 len = strlen (bufptr);
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125
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126 if (len == grow_size - 1)
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127 {
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128 int tmp = bufptr - buf + grow_size - 1;
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129 grow_size *= 2;
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130 max_size += grow_size;
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131 buf = static_cast<char *> (gnulib::realloc (buf, max_size));
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132 bufptr = buf + tmp;
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133
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134 if (*(bufptr-1) == '\n')
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135 {
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136 *bufptr = '\0';
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137 retval = buf;
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138 }
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139 }
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140 else if (bufptr[len-1] != '\n')
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141 {
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142 bufptr[len++] = '\n';
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143 bufptr[len] = '\0';
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144 retval = buf;
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145 }
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146 else
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147 retval = buf;
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148 }
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149 else
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150 {
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
151 if (len == 0)
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152 {
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
153 eof = true;
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154
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155 free (buf);
2926
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jwe
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diff changeset
156
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157 buf = 0;
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158 }
2926
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159
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160 break;
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
161 }
2926
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jwe
parents: 2847
diff changeset
162 }
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
163 while (retval.empty ());
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
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164
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
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165 if (buf)
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
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diff changeset
166 free (buf);
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
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167
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Jaroslav Hajek <highegg@gmail.com>
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168 octave_quit ();
10068
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Jaroslav Hajek <highegg@gmail.com>
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169
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170 return retval;
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
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diff changeset
171 }
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172
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173 std::string
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jwe
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174 octave_fgetl (FILE *f)
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175 {
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176 bool eof;
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177 return octave_fgetl (f, eof);
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
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178 }
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179
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180 std::string
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jwe
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181 octave_fgetl (FILE *f, bool& eof)
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jwe
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182 {
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
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183 std::string retval = octave_fgets (f, eof);
3970
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184
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185 size_t len = retval.length ();
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186
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187 if (retval[len-1] == '\n')
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188 retval.resize (len-1);
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189
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190 return retval;
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191 }
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192
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193 // Note that the caller is responsible for repositioning the stream on
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194 // failure.
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195
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196 template <typename T>
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197 T
14806
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198 read_inf_nan_na (std::istream& is, char c0)
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199 {
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200 T val = 0.0;
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201
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202 switch (c0)
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203 {
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204 case 'i': case 'I':
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205 {
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206 char c1 = is.get ();
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207 if (c1 == 'n' || c1 == 'N')
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208 {
12995
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209 char c2 = is.get ();
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210 if (c2 == 'f' || c2 == 'F')
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211 val = std::numeric_limits<T>::infinity ();
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212 else
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213 is.setstate (std::ios::failbit);
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214 }
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215 else
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diff changeset
216 is.setstate (std::ios::failbit);
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217 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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218 break;
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diff changeset
219
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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220 case 'n': case 'N':
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221 {
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diff changeset
222 char c1 = is.get ();
7872afb42fab fix scanf problem with reading I (bug #33722)
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diff changeset
223 if (c1 == 'a' || c1 == 'A')
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224 {
12995
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diff changeset
225 char c2 = is.get ();
7872afb42fab fix scanf problem with reading I (bug #33722)
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diff changeset
226 if (c2 == 'n' || c2 == 'N')
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227 val = std::numeric_limits<T>::quiet_NaN ();
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diff changeset
228 else
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diff changeset
229 val = octave_numeric_limits<T>::NA ();
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230 }
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
231 else
14806
980e2d5c83f7 avoid calling putback more than once between reads
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diff changeset
232 is.setstate (std::ios::failbit);
4130
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diff changeset
233 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
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diff changeset
234 break;
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
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diff changeset
235
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
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diff changeset
236 default:
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
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diff changeset
237 abort ();
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
238 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
239
14811
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diff changeset
240 return val;
4130
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diff changeset
241 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
242
12936
b74cb659e757 accept but discard sign when reading NA and NaN values
John W. Eaton <jwe@octave.org>
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diff changeset
243 // Read a double value. Discard any sign on NaN and NA.
b74cb659e757 accept but discard sign when reading NA and NaN values
John W. Eaton <jwe@octave.org>
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diff changeset
244
14811
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diff changeset
245 template <typename T>
4130
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jwe
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diff changeset
246 double
14811
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diff changeset
247 octave_read_fp_value (std::istream& is)
4130
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diff changeset
248 {
14811
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diff changeset
249 T val = 0.0;
4130
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diff changeset
250
14806
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diff changeset
251 // FIXME -- resetting stream position is likely to fail unless we are
980e2d5c83f7 avoid calling putback more than once between reads
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diff changeset
252 // reading from a file.
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diff changeset
253 std::ios::streampos pos = is.tellg ();
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diff changeset
254
6907
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
255 char c1 = ' ';
4130
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diff changeset
256
6907
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
257 while (isspace (c1))
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
258 c1 = is.get ();
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
259
14806
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diff changeset
260 bool neg = false;
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diff changeset
261
6194
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jwe
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diff changeset
262 switch (c1)
4130
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diff changeset
263 {
6194
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diff changeset
264 case '-':
14806
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diff changeset
265 neg = true;
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diff changeset
266 // fall through...
6194
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diff changeset
267
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
268 case '+':
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
269 {
10314
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diff changeset
270 char c2 = 0;
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
271 c2 = is.get ();
12936
b74cb659e757 accept but discard sign when reading NA and NaN values
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diff changeset
272 if (c2 == 'i' || c2 == 'I' || c2 == 'n' || c2 == 'N')
14811
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diff changeset
273 val = read_inf_nan_na<T> (is, c2);
10314
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diff changeset
274 else
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
275 {
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diff changeset
276 is.putback (c2);
14811
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diff changeset
277 is >> val;
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diff changeset
278 }
14806
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diff changeset
279
980e2d5c83f7 avoid calling putback more than once between reads
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diff changeset
280 if (neg && ! is.fail ())
14811
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diff changeset
281 val = -val;
6194
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
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diff changeset
282 }
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
283 break;
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jwe
parents: 5775
diff changeset
284
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
285 case 'i': case 'I':
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
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diff changeset
286 case 'n': case 'N':
14811
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diff changeset
287 val = read_inf_nan_na<T> (is, c1);
4130
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diff changeset
288 break;
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
289
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
290 default:
6194
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
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diff changeset
291 is.putback (c1);
14811
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diff changeset
292 is >> val;
14806
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diff changeset
293 break;
980e2d5c83f7 avoid calling putback more than once between reads
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parents: 14138
diff changeset
294 }
980e2d5c83f7 avoid calling putback more than once between reads
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diff changeset
295
980e2d5c83f7 avoid calling putback more than once between reads
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diff changeset
296 std::ios::iostate status = is.rdstate ();
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diff changeset
297 if (status & std::ios::failbit)
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diff changeset
298 {
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diff changeset
299 is.clear ();
980e2d5c83f7 avoid calling putback more than once between reads
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diff changeset
300 is.seekg (pos);
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301 is.setstate (status);
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302 }
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303
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304 return val;
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305 }
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306
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307 template <typename T>
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308 std::complex<T>
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309 octave_read_cx_fp_value (std::istream& is)
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310 {
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311 T re = 0.0, im = 0.0;
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312
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313 std::complex<T> cx = 0.0;
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314
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315 char ch = ' ';
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316
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317 while (isspace (ch))
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318 ch = is.get ();
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319
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320 if (ch == '(')
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321 {
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322 re = octave_read_value<T> (is);
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323 ch = is.get ();
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324
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325 if (ch == ',')
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326 {
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327 im = octave_read_value<T> (is);
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328 ch = is.get ();
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329
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330 if (ch == ')')
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331 cx = std::complex<T> (re, im);
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332 else
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333 is.setstate (std::ios::failbit);
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334 }
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335 else if (ch == ')')
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336 cx = re;
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337 else
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338 is.setstate (std::ios::failbit);
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339 }
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340 else
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341 {
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342 is.putback (ch);
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343 cx = octave_read_value<double> (is);
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344 }
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345
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346 return cx;
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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347 }
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348
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349 template <> OCTAVE_API double octave_read_value (std::istream& is)
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350 {
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351 return octave_read_fp_value<double> (is);
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352 }
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353
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354 template <> OCTAVE_API Complex octave_read_value (std::istream& is)
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355 {
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356 return octave_read_cx_fp_value<double> (is);
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357 }
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358
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359 template <> OCTAVE_API float octave_read_value (std::istream& is)
7789
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360 {
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361 return octave_read_fp_value<float> (is);
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362 }
7789
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363
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364 template <> OCTAVE_API FloatComplex octave_read_value (std::istream& is)
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diff changeset
365 {
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366 return octave_read_cx_fp_value<float> (is);
7789
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367 }
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368
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369 void
9469
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diff changeset
370 octave_write_double (std::ostream& os, double d)
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diff changeset
371 {
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
372 if (lo_ieee_is_NA (d))
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
373 os << "NA";
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
374 else if (lo_ieee_isnan (d))
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
375 os << "NaN";
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
376 else if (lo_ieee_isinf (d))
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
377 os << (d < 0 ? "-Inf" : "Inf");
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
378 else
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
379 os << d;
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
380 }
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
381
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
382 void
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
383 octave_write_complex (std::ostream& os, const Complex& c)
c6edba80dfae sanity checks for loading sparse matrices
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parents: 8920
diff changeset
384 {
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
385 os << "(";
c6edba80dfae sanity checks for loading sparse matrices
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parents: 8920
diff changeset
386 octave_write_double (os, real (c));
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
387 os << ",";
c6edba80dfae sanity checks for loading sparse matrices
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parents: 8920
diff changeset
388 octave_write_double (os, imag (c));
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
389 os << ")";
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
390 }
c6edba80dfae sanity checks for loading sparse matrices
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parents: 8920
diff changeset
391
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
392 void
7789
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diff changeset
393 octave_write_float (std::ostream& os, float d)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
394 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
395 if (lo_ieee_is_NA (d))
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
396 os << "NA";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
397 else if (lo_ieee_isnan (d))
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
398 os << "NaN";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
399 else if (lo_ieee_isinf (d))
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
400 os << (d < 0 ? "-Inf" : "Inf");
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
401 else
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
402 os << d;
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
403 }
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
404
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
405 void
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
406 octave_write_float_complex (std::ostream& os, const FloatComplex& c)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
407 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
408 os << "(";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
409 octave_write_float (os, real (c));
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
410 os << ",";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
411 octave_write_float (os, imag (c));
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
412 os << ")";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
413 }