* Copyright (c) 1983 Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strncat.s 5.5 (Berkeley) %G%"
#endif /* LIBC_SCCS and not lint */
* Concatenate string s2 on the end of s1
* and return the base of s1. The parameter
* n is the maximum length of string s2 to
movl r1,r3 # r3 = index(s1, '\0');
movzwl $65535,r2 # r2 = bytes in first chunk
cmpl r6,r2 # r2 = min(bytes in chunk, n);
locc $0,r2,(r1) # '\0' found?
subl2 r2,r1 # back up pointer updated by locc
movc3 r2,(r1),(r3) # copy in next piece
tstl r6 # run out of space?
clrb (r3) # force '\0' termination
subl2 r0,r2 # r2 = number of bytes to move
subl2 r2,r1 # back up pointer updated by locc
incl r2 # copy '\0' as well
movc3 r2,(r1),(r3) # copy in last piece
movl 4(ap),r0 # return s1