1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)index.c 5.7 (Berkeley) 02/24/91"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/cdefs.h> 13 #include <string.h> 14 #include <stddef.h> 15 16 char * 17 #ifdef STRCHR 18 strchr(p, ch) 19 #else 20 index(p, ch) 21 #endif 22 register const char *p, ch; 23 { 24 for (;; ++p) { 25 if (*p == ch) 26 return((char *)p); 27 if (!*p) 28 return((char *)NULL); 29 } 30 /* NOTREACHED */ 31 } 32