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[findutils.git] / lib / strspn.c
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1 /* strspn.c -- return numbers of chars at start of string in a class
2 Copyright (C) 1987, 1990, 2004 Free Software Foundation, Inc.
4 This file is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program 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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 Boston, MA 02110-1301, USA.
20 #include <config.h>
23 #if defined HAVE_STRING_H
24 #include <string.h>
25 #else
26 #include <strings.h>
27 #ifndef strchr
28 #define strchr index
29 #endif
30 #endif
32 #if !defined(HAVE_STRSPN)
33 int
34 strspn (str, class)
35 char *str, *class;
37 register char *st = str;
39 while (*st && strchr (class, *st))
40 ++st;
41 return st - str;
43 #endif