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- /* This is file STRCSPN.C */
- /* This file may have been modified by DJ Delorie (Jan 1991). If so,
- ** these modifications are Coyright (C) 1993 DJ Delorie, 24 Kirsten Ave,
- ** Rochester NH, 03867-2954, USA.
- */
-
- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement: ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)strcspn.c 5.5 (Berkeley) 5/16/90";
- #endif /* LIBC_SCCS and not lint */
-
- #include <sys/stdc.h>
- #include <string.h>
-
- /*
- * Span the complement of string s2.
- */
- size_t
- strcspn(s1, s2)
- const char *s1;
- register const char *s2;
- {
- register const char *p, *spanp;
- register char c, sc;
-
- /*
- * Stop as soon as we find any character from s2. Note that there
- * must be a NUL in s2; it suffices to stop when we find that, too.
- */
- for (p = s1;;) {
- c = *p++;
- spanp = s2;
- do {
- if ((sc = *spanp++) == c)
- return (p - 1 - s1);
- } while (sc != 0);
- }
- /* NOTREACHED */
- }
-