More small optimizations for x86-64 strlen.
[glibc.git] / string / strspn.c
blobdc17ea8cbc0dbae935100db52b9f8971e7287bf1
1 /* Copyright (C) 1991, 1997, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <string.h>
21 #undef strspn
23 /* Return the length of the maximum initial segment
24 of S which contains only characters in ACCEPT. */
25 size_t
26 strspn (s, accept)
27 const char *s;
28 const char *accept;
30 const char *p;
31 const char *a;
32 size_t count = 0;
34 for (p = s; *p != '\0'; ++p)
36 for (a = accept; *a != '\0'; ++a)
37 if (*p == *a)
38 break;
39 if (*a == '\0')
40 return count;
41 else
42 ++count;
45 return count;
47 libc_hidden_builtin_def (strspn)