1 /* 2 * Copyright (c) 1985 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific written prior permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 */ 12 13 #if defined(LIBC_SCCS) && !defined(lint) 14 static char sccsid[] = "@(#)strspn.c 5.3 (Berkeley) 05/25/88"; 15 #endif /* LIBC_SCCS and not lint */ 16 17 strspn(s, set) 18 register char *s, *set; 19 { 20 register n = 0; 21 register char *p; 22 register c; 23 24 while (c = *s++) { 25 for (p = set; *p; p++) 26 if (c == *p) 27 break; 28 if (!*p) 29 return (n); 30 n++; 31 } 32 return (n); 33 } 34