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annotate liboctave/util/lo-utils.cc @ 15454:9b9f6dba39e0

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build: Use putenv module from gnulib. * bootstrap_gnulib.conf: Add putenv to list of modules. * configure.ac: Remove AC_CHECK_FUNCS call for putenv. * lo-utils.cc: Add gnulib:: decorator on putenv call. * libgnu/Makefile.am: Automatically updated by addition of putenv.
author Rik <rik@octave.org>
date Sat, 29 Sep 2012 15:41:18 -0700
parents 648dabbb4c6b
children 259c1f295a1e
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1 // utils.cc
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2 /*
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3
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4 Copyright (C) 1996-2012 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 <cstdlib>
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30 #include <cstdio>
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31 #include <cstring>
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32 #include <cfloat>
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33
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34 #include <limits>
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35 #include <string>
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36
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37 #include <sys/types.h>
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38 #include <unistd.h>
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39
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40 #include "quit.h"
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41
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42 #include "lo-error.h"
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43 #include "lo-ieee.h"
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44 #include "lo-mappers.h"
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45 #include "lo-utils.h"
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46
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47 bool xis_int_or_inf_or_nan (double x)
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48 { return xisnan (x) || D_NINT (x) == x; }
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49
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50 bool xis_one_or_zero (double x)
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51 { return x == 0 || x == 1; }
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52
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53 bool xis_zero (double x)
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54 { return x == 0; }
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55
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56 bool xtoo_large_for_float (double x)
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57 {
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58 return (! (xisnan (x) || xisinf (x))
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59 && 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 // This function was adapted from xputenv from Karl Berry's kpathsearch
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92 // library.
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93
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94 // FIXME -- make this do the right thing if we don't have a
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95 // SMART_PUTENV.
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96
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97 void
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98 octave_putenv (const std::string& name, const std::string& value)
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99 {
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100 int new_len = name.length () + value.length () + 2;
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101
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102 char *new_item = static_cast<char*> (gnulib::malloc (new_len));
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103
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104 sprintf (new_item, "%s=%s", name.c_str (), value.c_str ());
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105
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106 // As far as I can see there's no way to distinguish between the
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107 // various errors; putenv doesn't have errno values.
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108
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109 if (gnulib::putenv (new_item) < 0)
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110 (*current_liboctave_error_handler) ("putenv (%s) failed", new_item);
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111 }
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112
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113 std::string
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114 octave_fgets (FILE *f)
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115 {
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116 bool eof;
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117 return octave_fgets (f, eof);
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118 }
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119
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120 std::string
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121 octave_fgets (FILE *f, bool& eof)
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122 {
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123 eof = false;
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124
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125 std::string retval;
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126
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127 int grow_size = 1024;
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128 int max_size = grow_size;
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129
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130 char *buf = static_cast<char *> (gnulib::malloc (max_size));
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131 char *bufptr = buf;
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132 int len = 0;
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133
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134 do
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135 {
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136 if (gnulib::fgets (bufptr, grow_size, f))
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137 {
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138 len = strlen (bufptr);
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139
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140 if (len == grow_size - 1)
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141 {
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142 int tmp = bufptr - buf + grow_size - 1;
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143 grow_size *= 2;
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144 max_size += grow_size;
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145 buf = static_cast<char *> (gnulib::realloc (buf, max_size));
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146 bufptr = buf + tmp;
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147
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148 if (*(bufptr-1) == '\n')
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
149 {
07ebe522dac2 untabify liboctave C++ sources
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parents: 10182
diff changeset
150 *bufptr = '\0';
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
151 retval = buf;
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
152 }
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
153 }
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
154 else if (bufptr[len-1] != '\n')
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
155 {
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
156 bufptr[len++] = '\n';
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
157 bufptr[len] = '\0';
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
158 retval = buf;
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
159 }
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
160 else
07ebe522dac2 untabify liboctave C++ sources
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parents: 10182
diff changeset
161 retval = buf;
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
162 }
2926
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
163 else
10314
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John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
164 {
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
165 if (len == 0)
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
166 {
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
167 eof = true;
4527
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
168
10314
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diff changeset
169 free (buf);
2926
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jwe
parents: 2847
diff changeset
170
10314
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diff changeset
171 buf = 0;
07ebe522dac2 untabify liboctave C++ sources
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parents: 10182
diff changeset
172 }
2926
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jwe
parents: 2847
diff changeset
173
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parents: 10182
diff changeset
174 break;
07ebe522dac2 untabify liboctave C++ sources
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parents: 10182
diff changeset
175 }
2926
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
176 }
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
177 while (retval.empty ());
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
178
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
179 if (buf)
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
180 free (buf);
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
181
10142
829e69ec3110 make OCTAVE_QUIT a function
Jaroslav Hajek <highegg@gmail.com>
parents: 10068
diff changeset
182 octave_quit ();
10068
ca93f583573d handle interrupts octave_fgets
Jaroslav Hajek <highegg@gmail.com>
parents: 9469
diff changeset
183
2926
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
184 return retval;
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
185 }
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
parents: 2847
diff changeset
186
3970
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jwe
parents: 3504
diff changeset
187 std::string
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
188 octave_fgetl (FILE *f)
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
189 {
4527
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jwe
parents: 4130
diff changeset
190 bool eof;
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
191 return octave_fgetl (f, eof);
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
192 }
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
193
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
194 std::string
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
195 octave_fgetl (FILE *f, bool& eof)
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
196 {
c0a23a13eea2 [project @ 2003-10-03 02:52:46 by jwe]
jwe
parents: 4130
diff changeset
197 std::string retval = octave_fgets (f, eof);
3970
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diff changeset
198
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
199 size_t len = retval.length ();
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
200
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
201 if (retval[len-1] == '\n')
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
202 retval.resize (len-1);
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
203
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
204 return retval;
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
205 }
4f884e25aab9 [project @ 2002-07-02 04:14:35 by jwe]
jwe
parents: 3504
diff changeset
206
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
207 // Note that the caller is responsible for repositioning the stream on
980e2d5c83f7 avoid calling putback more than once between reads
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parents: 14138
diff changeset
208 // failure.
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
209
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
210 template <typename T>
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
211 T
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
212 read_inf_nan_na (std::istream& is, char c0)
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
213 {
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
214 T val = 0.0;
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
215
12995
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
216 switch (c0)
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
217 {
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
218 case 'i': case 'I':
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
219 {
12995
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
220 char c1 = is.get ();
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
221 if (c1 == 'n' || c1 == 'N')
10314
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parents: 10182
diff changeset
222 {
12995
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
223 char c2 = is.get ();
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
224 if (c2 == 'f' || c2 == 'F')
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
225 val = std::numeric_limits<T>::infinity ();
10314
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
226 else
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
227 is.setstate (std::ios::failbit);
10314
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
228 }
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
229 else
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
230 is.setstate (std::ios::failbit);
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
231 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
232 break;
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
233
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
234 case 'n': case 'N':
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
235 {
12995
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
236 char c1 = is.get ();
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
237 if (c1 == 'a' || c1 == 'A')
10314
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
238 {
12995
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
239 char c2 = is.get ();
7872afb42fab fix scanf problem with reading I (bug #33722)
John W. Eaton <jwe@octave.org>
parents: 12936
diff changeset
240 if (c2 == 'n' || c2 == 'N')
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
241 val = std::numeric_limits<T>::quiet_NaN ();
10314
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
242 else
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
243 val = octave_numeric_limits<T>::NA ();
10314
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parents: 10182
diff changeset
244 }
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
245 else
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
246 is.setstate (std::ios::failbit);
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
247 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
248 break;
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
249
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
250 default:
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
251 abort ();
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
252 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
253
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
254 return val;
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
255 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
256
12936
b74cb659e757 accept but discard sign when reading NA and NaN values
John W. Eaton <jwe@octave.org>
parents: 12918
diff changeset
257 // 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>
parents: 12918
diff changeset
258
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
259 template <typename T>
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
260 double
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
261 octave_read_fp_value (std::istream& is)
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
262 {
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
263 T val = 0.0;
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
264
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
265 // FIXME -- resetting stream position is likely to fail unless we are
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
266 // reading from a file.
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
267 std::ios::streampos pos = is.tellg ();
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
268
6907
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
269 char c1 = ' ';
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
270
6907
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
271 while (isspace (c1))
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
272 c1 = is.get ();
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
jwe
parents: 6897
diff changeset
273
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
274 bool neg = false;
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
275
6194
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
276 switch (c1)
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
277 {
6194
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
278 case '-':
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
279 neg = true;
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
280 // fall through...
6194
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
281
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
282 case '+':
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
283 {
10314
07ebe522dac2 untabify liboctave C++ sources
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parents: 10182
diff changeset
284 char c2 = 0;
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
285 c2 = is.get ();
12936
b74cb659e757 accept but discard sign when reading NA and NaN values
John W. Eaton <jwe@octave.org>
parents: 12918
diff changeset
286 if (c2 == 'i' || c2 == 'I' || c2 == 'n' || c2 == 'N')
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
287 val = read_inf_nan_na<T> (is, c2);
10314
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
288 else
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
289 {
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
290 is.putback (c2);
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
291 is >> val;
10314
07ebe522dac2 untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
292 }
14806
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
293
980e2d5c83f7 avoid calling putback more than once between reads
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
294 if (neg && ! is.fail ())
14811
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
John W. Eaton <jwe@octave.org>
parents: 14806
diff changeset
295 val = -val;
6194
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
296 }
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
297 break;
0d2ff0dfb159 [project @ 2006-12-01 05:25:38 by jwe]
jwe
parents: 5775
diff changeset
298
4130
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
jwe
parents: 3970
diff changeset
299 case 'i': case 'I':
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300 case 'n': case 'N':
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301 val = read_inf_nan_na<T> (is, c1);
4130
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302 break;
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303
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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304 default:
6194
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305 is.putback (c1);
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306 is >> val;
14806
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307 break;
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308 }
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309
980e2d5c83f7 avoid calling putback more than once between reads
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310 std::ios::iostate status = is.rdstate ();
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311 if (status & std::ios::failbit)
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312 {
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313 is.clear ();
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314 is.seekg (pos);
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315 is.setstate (status);
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316 }
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317
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318 return val;
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319 }
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320
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321 template <typename T>
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322 std::complex<T>
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323 octave_read_cx_fp_value (std::istream& is)
4130
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324 {
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325 T re = 0.0, im = 0.0;
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326
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327 std::complex<T> cx = 0.0;
4130
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328
6907
c8081f4c094f [project @ 2007-09-17 17:31:10 by jwe]
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329 char ch = ' ';
4130
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330
6907
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diff changeset
331 while (isspace (ch))
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332 ch = is.get ();
4130
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333
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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334 if (ch == '(')
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335 {
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336 re = octave_read_value<T> (is);
6897
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337 ch = is.get ();
4130
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338
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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339 if (ch == ',')
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340 {
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341 im = octave_read_value<T> (is);
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342 ch = is.get ();
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343
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344 if (ch == ')')
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345 cx = std::complex<T> (re, im);
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346 else
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347 is.setstate (std::ios::failbit);
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348 }
4130
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349 else if (ch == ')')
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350 cx = re;
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351 else
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352 is.setstate (std::ios::failbit);
4130
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353 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
354 else
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
355 {
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
356 is.putback (ch);
9469
c6edba80dfae sanity checks for loading sparse matrices
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diff changeset
357 cx = octave_read_value<double> (is);
4130
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358 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
359
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
360 return cx;
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
361 }
7d9bda865012 [project @ 2002-10-28 21:05:30 by jwe]
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diff changeset
362
14811
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diff changeset
363 template <> OCTAVE_API double octave_read_value (std::istream& is)
7789
82be108cc558 First attempt at single precision tyeps
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diff changeset
364 {
14811
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diff changeset
365 return octave_read_fp_value<double> (is);
7789
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diff changeset
366 }
82be108cc558 First attempt at single precision tyeps
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diff changeset
367
14811
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diff changeset
368 template <> OCTAVE_API Complex octave_read_value (std::istream& is)
7789
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diff changeset
369 {
14811
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370 return octave_read_cx_fp_value<double> (is);
7789
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diff changeset
371 }
82be108cc558 First attempt at single precision tyeps
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diff changeset
372
14811
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diff changeset
373 template <> OCTAVE_API float octave_read_value (std::istream& is)
7789
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diff changeset
374 {
14811
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diff changeset
375 return octave_read_fp_value<float> (is);
52cb71787cd1 use templates to avoid code duplication in octave_read_value functions
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diff changeset
376 }
7789
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diff changeset
377
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diff changeset
378 template <> OCTAVE_API FloatComplex octave_read_value (std::istream& is)
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diff changeset
379 {
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diff changeset
380 return octave_read_cx_fp_value<float> (is);
7789
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diff changeset
381 }
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
382
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
383 void
9469
c6edba80dfae sanity checks for loading sparse matrices
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parents: 8920
diff changeset
384 octave_write_double (std::ostream& os, double d)
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
385 {
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
386 if (lo_ieee_is_NA (d))
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
387 os << "NA";
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
388 else if (lo_ieee_isnan (d))
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
389 os << "NaN";
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
390 else if (lo_ieee_isinf (d))
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
391 os << (d < 0 ? "-Inf" : "Inf");
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
392 else
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
393 os << d;
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
394 }
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
395
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
396 void
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
397 octave_write_complex (std::ostream& os, const Complex& c)
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
398 {
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
399 os << "(";
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
400 octave_write_double (os, real (c));
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
401 os << ",";
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
402 octave_write_double (os, imag (c));
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
403 os << ")";
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
404 }
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
405
c6edba80dfae sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
parents: 8920
diff changeset
406 void
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
407 octave_write_float (std::ostream& os, float d)
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
408 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
409 if (lo_ieee_is_NA (d))
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
410 os << "NA";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
411 else if (lo_ieee_isnan (d))
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
412 os << "NaN";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
413 else if (lo_ieee_isinf (d))
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
414 os << (d < 0 ? "-Inf" : "Inf");
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
415 else
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
416 os << d;
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
417 }
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
418
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
419 void
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
420 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
421 {
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
422 os << "(";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
423 octave_write_float (os, real (c));
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
424 os << ",";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
425 octave_write_float (os, imag (c));
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
426 os << ")";
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7048
diff changeset
427 }