1 /* 2 * Copyright (c) 1988 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[] = "@(#)index.c 5.3 (Berkeley) 06/02/88"; 15 #endif /* LIBC_SCCS and not lint */ 16 17 #include <stdio.h> 18 19 char * 20 index(p, ch) 21 register char *p, ch; 22 { 23 for (;; ++p) { 24 if (*p == ch) 25 return(p); 26 if (!*p) 27 return((char *)NULL); 28 } 29 /* NOTREACHED */ 30 } 31