about summary refs log tree commit diff
path: root/wcsmbs/wcscat.c
blob: 4ff5c861e4de435b12192a1f7d08ab71366080e8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
/* Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.	 If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <wcstr.h>


/* Append SRC on the end of DEST.  */
wchar_t *
wcscat (dest, src)
    wchar_t *dest;
    const wchar_t *src;
{
  register wchar_t *s1 = dest;
  register const wchar_t *s2 = src;
  wchar_t c;

  /* Find the end of the string.  */
  do
    c = *s1++;
  while (c != L'\0');

  /* Make S1 point before the next character, so we can increment
     it while memory is read (wins on pipelined cpus).	*/
  s1 -= 2;

  do
    {
      c = *s2++;
      *++s1 = c;
    }
  while (c != L'\0');

  return dest;
}