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annotate lib/hard-locale.c @ 6163:bba2240c9260

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* iconvme.h: Add prototype for iconv_alloc.
author Simon Josefsson <simon@josefsson.org>
date Tue, 30 Aug 2005 07:38:53 +0000
parents a48fb0e98c8c
children 96c32553b4c6
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1 /* hard-locale.c -- Determine whether a locale is hard.
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2
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3 Copyright (C) 1997, 1998, 1999, 2002, 2003, 2004 Free Software
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4 Foundation, Inc.
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5
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software Foundation,
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18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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19
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20 #if HAVE_CONFIG_H
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21 # include <config.h>
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22 #endif
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23
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24 #include "hard-locale.h"
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25
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26 #include <locale.h>
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27 #include <stdlib.h>
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28 #include <string.h>
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29
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30 #include "strdup.h"
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31
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32 #ifdef __GLIBC__
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33 # define GLIBC_VERSION __GLIBC__
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34 #else
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35 # define GLIBC_VERSION 0
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36 #endif
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37
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38 /* Return true if the current CATEGORY locale is hard, i.e. if you
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39 can't get away with assuming traditional C or POSIX behavior. */
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40 bool
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41 hard_locale (int category)
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42 {
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43 bool hard = true;
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44 char const *p = setlocale (category, NULL);
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45
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46 if (p)
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47 {
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48 if (2 <= GLIBC_VERSION)
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49 {
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50 if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0)
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51 hard = false;
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52 }
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53 else
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54 {
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55 char *locale = strdup (p);
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56 if (locale)
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57 {
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58 /* Temporarily set the locale to the "C" and "POSIX" locales
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59 to find their names, so that we can determine whether one
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60 or the other is the caller's locale. */
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61 if (((p = setlocale (category, "C"))
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62 && strcmp (p, locale) == 0)
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63 || ((p = setlocale (category, "POSIX"))
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64 && strcmp (p, locale) == 0))
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65 hard = false;
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66
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67 /* Restore the caller's locale. */
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68 setlocale (category, locale);
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69 free (locale);
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70 }
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71 }
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72 }
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73
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74 return hard;
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75 }