Line data    Source code

       1             : /* Convert string to double, using the C locale.
       2             : 
       3             :    Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
       4             : 
       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 3 of the License, or
       8             :    (at your option) any later version.
       9             : 
      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.
      14             : 
      15             :    You should have received a copy of the GNU General Public License
      16             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      17             : 
      18             : /* Written by Paul Eggert.  */
      19             : 
      20             : #include <config.h>
      21             : 
      22             : #include "c-strtod.h"
      23             : 
      24             : #include <locale.h>
      25             : #include <stdlib.h>
      26             : 
      27             : #include "xalloc.h"
      28             : 
      29             : #if LONG
      30             : # define C_STRTOD c_strtold
      31             : # define DOUBLE long double
      32             : # define STRTOD_L strtold_l
      33             : #else
      34             : # define C_STRTOD c_strtod
      35             : # define DOUBLE double
      36             : # define STRTOD_L strtod_l
      37             : #endif
      38             : 
      39             : /* c_strtold falls back on strtod if strtold doesn't conform to C99.  */
      40             : #if LONG && HAVE_C99_STRTOLD
      41             : # define STRTOD strtold
      42             : #else
      43             : # define STRTOD strtod
      44             : #endif
      45             : 
      46             : DOUBLE
      47          80 : C_STRTOD (char const *nptr, char **endptr)
      48             : {
      49             :   DOUBLE r;
      50             : 
      51             : #ifdef LC_ALL_MASK
      52             : 
      53          80 :   locale_t c_locale = newlocale (LC_ALL_MASK, "C", 0);
      54          80 :   r = STRTOD_L (nptr, endptr, c_locale);
      55          80 :   freelocale (c_locale);
      56             : 
      57             : #else
      58             : 
      59             :   char *saved_locale = setlocale (LC_NUMERIC, NULL);
      60             : 
      61             :   if (saved_locale)
      62             :     {
      63             :       saved_locale = xstrdup (saved_locale);
      64             :       setlocale (LC_NUMERIC, "C");
      65             :     }
      66             : 
      67             :   r = STRTOD (nptr, endptr);
      68             : 
      69             :   if (saved_locale)
      70             :     {
      71             :       setlocale (LC_NUMERIC, saved_locale);
      72             :       free (saved_locale);
      73             :     }
      74             : 
      75             : #endif
      76             : 
      77          80 :   return r;
      78             : }