1 /* Convert string to double, using the C locale.
3 Copyright (C) 2003, 2004 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* Written by Paul Eggert. */
21 #ifdef HAVE_CONFIG_H
22 # include <config.h>
23 #endif
25 #include "c-strtod.h"
27 #include <locale.h>
28 #include <stdlib.h>
30 #include "xalloc.h"
32 #if LONG
33 # define C_STRTOD c_strtold
34 # define DOUBLE long double
35 # define STRTOD_L strtold_l
36 #else
37 # define C_STRTOD c_strtod
38 # define DOUBLE double
39 # define STRTOD_L strtod_l
40 #endif
42 /* c_strtold falls back on strtod if strtold doesn't conform to C99. */
43 #if LONG && HAVE_C99_STRTOLD
44 # define STRTOD strtold
45 #else
46 # define STRTOD strtod
47 #endif
49 DOUBLE
50 C_STRTOD (char const *nptr, char **endptr)
51 {
52 DOUBLE r;
54 #ifdef LC_ALL_MASK
56 locale_t c_locale = newlocale (LC_ALL_MASK, "C", 0);
57 r = STRTOD_L (nptr, endptr, c_locale);
58 freelocale (c_locale);
60 #else
62 char *saved_locale = setlocale (LC_NUMERIC, NULL);
64 if (saved_locale)
65 {
66 saved_locale = xstrdup (saved_locale);
67 setlocale (LC_NUMERIC, "C");
68 }
70 r = STRTOD (nptr, endptr);
72 if (saved_locale)
73 {
74 setlocale (LC_NUMERIC, saved_locale);
75 free (saved_locale);
76 }
78 #endif
80 return r;
81 }