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8104
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1 /* Searching a string for a character among a given set of characters. |
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2 Copyright (C) 1999, 2002, 2006-2007 Free Software Foundation, Inc. |
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3 Written by Bruno Haible <bruno@clisp.org>, 2007. |
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4 |
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5 This program is free software; you can redistribute it and/or modify |
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6 it under the terms of the GNU General Public License as published by |
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7 the Free Software Foundation; either version 2, or (at your option) |
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8 any later version. |
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9 |
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10 This program is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 GNU General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU General Public License |
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16 along with this program; if not, write to the Free Software Foundation, |
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
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18 |
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19 #include <config.h> |
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20 |
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21 /* Specification. */ |
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22 #include <string.h> |
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23 |
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24 #if HAVE_MBRTOWC |
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25 # include "mbuiter.h" |
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26 #endif |
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27 |
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28 /* Find the first occurrence in the character string STRING of any character |
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29 in the character string ACCEPT. Return the pointer to it, or NULL if none |
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30 exists. */ |
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31 char * |
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32 mbspbrk (const char *string, const char *accept) |
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33 { |
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34 /* Optimize two cases. */ |
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35 if (accept[0] == '\0') |
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36 return NULL; |
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37 if (accept[1] == '\0') |
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38 return mbschr (string, accept[0]); |
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39 /* General case. */ |
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40 #if HAVE_MBRTOWC |
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41 if (MB_CUR_MAX > 1) |
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42 { |
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43 mbui_iterator_t iter; |
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44 |
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45 for (mbui_init (iter, string); mbui_avail (iter); mbui_advance (iter)) |
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46 { |
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47 if (mb_len (mbui_cur (iter)) == 1) |
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48 { |
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8140
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49 if (mbschr (accept, * mbui_cur_ptr (iter))) |
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8104
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50 return (char *) mbui_cur_ptr (iter); |
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51 } |
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52 else |
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53 { |
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54 mbui_iterator_t aiter; |
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55 |
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56 for (mbui_init (aiter, accept); |
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57 mbui_avail (aiter); |
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58 mbui_advance (aiter)) |
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59 if (mb_equal (mbui_cur (aiter), mbui_cur (iter))) |
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60 return (char *) mbui_cur_ptr (iter); |
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61 } |
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62 } |
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63 return NULL; |
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64 } |
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65 else |
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66 #endif |
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67 return strpbrk (string, accept); |
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68 } |
