1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #if defined(LIBC_SCCS) && !defined(lint) 12 static char sccsid[] = "@(#)memchr.c 8.1 (Berkeley) 06/04/93"; 13 #endif /* LIBC_SCCS and not lint */ 14 15 #include <sys/cdefs.h> 16 #include <string.h> 17 18 void * 19 memchr(s, c, n) 20 const void *s; 21 register unsigned char c; 22 register size_t n; 23 { 24 if (n != 0) { 25 register const unsigned char *p = s; 26 27 do { 28 if (*p++ == c) 29 return ((void *)(p - 1)); 30 } while (--n != 0); 31 } 32 return (NULL); 33 } 34