usr/src/lib/libcompat/4.1/strcatn.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strcatn.c   4.3 (Berkeley) %G%";
#endif LIBC_SCCS and not lint

/*
 * Concatenate s2 on the end of s1.  S1's space must be large enough.
 * At most n characters are moved.
 * Return s1.
 */

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

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