1 /* Searching a string for a character among a given set of characters.
2 Copyright (C) 1999, 2002, 2006-2019 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2007.
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.
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, see <https://www.gnu.org/licenses/>. */
25 /* Find the first occurrence in the character string STRING of any character
26 in the character string ACCEPT. Return the number of bytes from the
27 beginning of the string to this occurrence, or to the end of the string
30 mbscspn (const char *string
, const char *accept
)
32 /* Optimize two cases. */
33 if (accept
[0] == '\0')
34 return strlen (string
);
35 if (accept
[1] == '\0')
37 const char *ptr
= mbschr (string
, accept
[0]);
38 return (ptr
!= NULL
? ptr
- string
: strlen (string
));
45 for (mbui_init (iter
, string
); mbui_avail (iter
); mbui_advance (iter
))
47 if (mb_len (mbui_cur (iter
)) == 1)
49 if (mbschr (accept
, * mbui_cur_ptr (iter
)))
54 mbui_iterator_t aiter
;
56 for (mbui_init (aiter
, accept
);
59 if (mb_equal (mbui_cur (aiter
), mbui_cur (iter
)))
64 return mbui_cur_ptr (iter
) - string
;
67 return strcspn (string
, accept
);