strxfrm.c

minux的源代码,一个非常小的操作系统

/*
 * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
 * See the copyright notice in the ACK home directory, in the file "Copyright".
 */
/* $Header: strxfrm.c,v 1.4 90/08/28 13:54:46 eck Exp $ */

#include	<string.h>

size_t
strxfrm(register char *s1, register const char *save, register size_t n)
{
	register const char *s2 = save;

	while (*s2) {
		if (n > 1) {
			n--;
			*s1++ = *s2++;
		} else
			s2++;
	}
	if (n > 0)
		*s1++ = '\0';
	return s2 - save;
}