Return to strncat.s CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / tahoe / string

Annotation of 43BSDReno/lib/libc/tahoe/string/strncat.s, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  *
                     19:  * This code is derived from software contributed to Berkeley by
                     20:  * Computer Consoles Inc.
                     21:  */
                     22: 
                     23: #if defined(LIBC_SCCS) && !defined(lint)
                     24:        .asciz "@(#)strncat.s   1.5 (Berkeley) 6/1/90"
                     25: #endif /* LIBC_SCCS and not lint */
                     26: 
                     27: /*
                     28:  * Concatenate s2 on the end of s1.  S1's space must be large enough.
                     29:  * At most n characters are moved.
                     30:  * Return s1.
                     31:  * 
                     32:  * char *strncat(s1, s2, n)
                     33:  * register char *s1, *s2;
                     34:  * register n;
                     35:  */
                     36: #include "DEFS.h"
                     37: 
                     38: ENTRY(strncat, 0)
                     39:        tstl    12(fp)
                     40:        jgtr    n_ok
                     41:        movl    4(fp),r0
                     42:        ret
                     43: n_ok:
                     44:        movl    8(fp),r0
                     45:        movl    r0,r1
                     46:        cmps2                   # r0 points at null at end of s2
                     47:        subl3   8(fp),r0,r2     # r2 = numberof non-null chars in s2
                     48:        cmpl    12(fp),r2
                     49:        jgeq    r2_ok
                     50:        movl    12(fp),r2       # r2 = min (n, length(s2))
                     51: r2_ok:
                     52:        movl    4(fp),r0
                     53:        movl    r0,r1
                     54:        cmps2                   # r1 points at null at end of s1
                     55:        movl    8(fp),r0        # source for copy
                     56:        movs3                   # actual copy
                     57:        clrb    (r1)            # null terminated string !
                     58:        movl    4(fp),r0
                     59:        ret

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.