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glibc  2.9
strcspn.c
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00001 /* Copyright (C) 1991, 1994, 1996, 1997, 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #if HAVE_CONFIG_H
00020 # include <config.h>
00021 #endif
00022 
00023 #if defined _LIBC || HAVE_STRING_H
00024 # include <string.h>
00025 #else
00026 # include <strings.h>
00027 # ifndef strchr
00028 #  define strchr index
00029 # endif
00030 #endif
00031 
00032 #undef strcspn
00033 
00034 /* Return the length of the maximum initial segment of S
00035    which contains no characters from REJECT.  */
00036 size_t
00037 strcspn (s, reject)
00038      const char *s;
00039      const char *reject;
00040 {
00041   size_t count = 0;
00042 
00043   while (*s != '\0')
00044     if (strchr (reject, *s++) == NULL)
00045       ++count;
00046     else
00047       return count;
00048 
00049   return count;
00050 }
00051 libc_hidden_builtin_def (strcspn)