memchr.c

来自「操作系统SunOS 4.1.3版本的源码」· C语言 代码 · 共 20 行

#if !defined(lint) && defined(SCCSIDS)
static	char sccsid[] = "@(#)memchr.c 1.1 92/07/30 SMI"; /* from S5R2 1.1 */
#endif

/*LINTLIBRARY*/
/*
 * Return the ptr in sp at which the character c appears;
 *   NULL if not found in n chars; don't stop at \0.
 */
char *
memchr(sp, c, n)
register char *sp, c;
register int n;
{
	while (--n >= 0)
		if (*sp++ == c)
			return (--sp);
	return (0);
}