lib/strspn.c

   1 /* strspn.c -- return numbers of chars at start of string in a class
   2    Copyright (C) 1987, 1990, 2004 Free Software Foundation, Inc.
   3
   4    This program 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 3 of the License, or
   7    (at your option) any later version.
   8
   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.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #include <config.h>
  19
  20
  21 #if defined HAVE_STRING_H
  22 #include <string.h>
  23 #else
  24 #include <strings.h>
  25 #ifndef strchr
  26 #define strchr index
  27 #endif
  28 #endif
  29
  30 #if !defined(HAVE_STRSPN)
  31 int
  32 strspn (str, class)
  33      char *str, *class;
  34 {
  35   register char *st = str;
  36
  37   while (*st && strchr (class, *st))
  38     ++st;
  39   return st - str;
  40 }
  41 #endif