| 1 | /* Copyright (C) 1991, 1997 Free Software Foundation, Inc. |
| 2 | |
| 3 | NOTE: The canonical source of this file is maintained with the GNU |
| 4 | C Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Library General Public License |
| 8 | as published by the Free Software Foundation; either version 2 of |
| 9 | the License, or (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Library General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Library General Public |
| 17 | License along with this program; see the file COPYING.LIB. If not, |
| 18 | write to the Free Software Foundation, Inc., 59 Temple Place - |
| 19 | Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #if HAVE_CONFIG_H |
| 22 | # include <config.h> |
| 23 | #endif |
| 24 | |
| 25 | #if defined _LIBC || HAVE_STRING_H |
| 26 | # include <string.h> |
| 27 | #else |
| 28 | # include <strings.h> |
| 29 | # ifndef strchr |
| 30 | # define strchr index |
| 31 | # endif |
| 32 | #endif |
| 33 | |
| 34 | #undef strspn |
| 35 | |
| 36 | /* Return the length of the maximum initial segment |
| 37 | of S which contains only characters in ACCEPT. */ |
| 38 | size_t |
| 39 | strspn (s, accept) |
| 40 | const char *s; |
| 41 | const char *accept; |
| 42 | { |
| 43 | const char *p; |
| 44 | const char *a; |
| 45 | size_t count = 0; |
| 46 | |
| 47 | for (p = s; *p != '\0'; ++p) |
| 48 | { |
| 49 | for (a = accept; *a != '\0'; ++a) |
| 50 | if (*p == *a) |
| 51 | break; |
| 52 | if (*a == '\0') |
| 53 | return count; |
| 54 | else |
| 55 | ++count; |
| 56 | } |
| 57 | |
| 58 | return count; |
| 59 | } |