Mercurial > hg > xemacs-beta

comparison src/strcat.c @ 428:3ecd8885ac67 r21-2-22

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
parents
children abe6d1db359e
comparison
equal deleted inserted replaced
427:0a0253eac470 428:3ecd8885ac67
1 /* Copyright (C) 1991 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
18
19 /* Synched up with: Not in FSF. */
20
21 # include <config.h>
22 # ifndef REGISTER /* Strictly enforced in 20.3 */
23 # define REGISTER
24 # endif
25
26 /* In HPUX 10 the strcat function references memory past the last byte of
27 the string! This will core dump if the memory following the last byte is
28 not mapped.
29
30 Here is a correct version from glibc 1.09.
31 */
32
33 char *strcat (char *dest, const char *src);
34
35 /* Append SRC on the end of DEST. */
36 /* CONST IS LOSING, but const is part of the interface of strcat */
37 char *
38 strcat (char *dest, const char *src)
39 {
40 REGISTER char *s1 = dest;
41 REGISTER CONST char *s2 = src;
42 char c;
43
44 /* Find the end of the string. */
45 do
46 c = *s1++;
47 while (c != '\0');
48
49 /* Make S1 point before the next character, so we can increment
50 it while memory is read (wins on pipelined cpus). */
51 s1 -= 2;
52
53 do
54 {
55 c = *s2++;
56 *++s1 = c;
57 }
58 while (c != '\0');
59
60 return dest;
61 }