strncpy.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 34 行

#ifndef lint
static char *sccsid = "@(#)strncpy.c	4.1	(ULTRIX)	7/3/90";
#endif not lint
/* ------------------------------------------------------------------ */
/* | Copyright Unpublished, MIPS Computer Systems, Inc.  All Rights | */
/* | Reserved.  This software contains proprietary and confidential | */
/* | information of MIPS and its suppliers.  Use, disclosure or     | */
/* | reproduction is prohibited without the prior express written   | */
/* | consent of MIPS.                                               | */
/* ------------------------------------------------------------------ */
/* $Header: strncpy.c,v 1.1 87/02/16 11:17:02 dce Exp $ */

/*
 * Copy s2 to s1, truncating or null-padding to always copy n bytes
 * return s1
 */

char *
strncpy(s1, s2, n)
register char *s1, *s2;
{
	register i;
	register char *os1;

	os1 = s1;
	for (i = 0; i < n; i++)
		if ((*s1++ = *s2++) == '\0') {
			while (++i < n)
				*s1++ = '\0';
			return(os1);
		}
	return(os1);
}