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1 | /* Copyright (C) 1991, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
28f540f4 | 3 | |
c84142e8 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
28f540f4 | 8 | |
c84142e8 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Library General Public License for more details. | |
28f540f4 | 13 | |
c84142e8 UD |
14 | You should have received a copy of the GNU Library General Public |
15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
28f540f4 | 18 | |
28f540f4 RM |
19 | #include <string.h> |
20 | ||
9a0a462c | 21 | #undef strspn |
28f540f4 RM |
22 | |
23 | /* Return the length of the maximum initial segment | |
24 | of S which contains only characters in ACCEPT. */ | |
25 | size_t | |
c84142e8 UD |
26 | strspn (s, accept) |
27 | const char *s; | |
28 | const char *accept; | |
28f540f4 | 29 | { |
c84142e8 UD |
30 | const char *p; |
31 | const char *a; | |
32 | size_t count = 0; | |
28f540f4 RM |
33 | |
34 | for (p = s; *p != '\0'; ++p) | |
35 | { | |
36 | for (a = accept; *a != '\0'; ++a) | |
37 | if (*p == *a) | |
38 | break; | |
39 | if (*a == '\0') | |
40 | return count; | |
41 | else | |
42 | ++count; | |
43 | } | |
44 | ||
45 | return count; | |
46 | } |