strncpy.c

来自「操作系统SunOS 4.1.3版本的源码」· C语言 代码 · 共 24 行

#ifndef lint
static	char sccsid[] = "@(#)strncpy.c 1.1 92/07/30 SMI"; /* from S5R2 1.3 */
#endif

/*LINTLIBRARY*/
/*
 * 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 int n;
{
	register char *os1 = s1;

	while (--n >= 0)
		if ((*s1++ = *s2++) == '\0')
			while (--n >= 0)
				*s1++ = '\0';
	return (os1);
}