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85dd1003 | 1 | /* Copyright (C) 1991, 1997, 2003 Free Software Foundation, Inc. |
c84142e8 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
c84142e8 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
c84142e8 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
28f540f4 RM |
18 | #include <string.h> |
19 | #include <memcopy.h> | |
20 | ||
9a0a462c UD |
21 | #undef strcat |
22 | ||
28f540f4 RM |
23 | /* Append SRC on the end of DEST. */ |
24 | char * | |
c84142e8 UD |
25 | strcat (dest, src) |
26 | char *dest; | |
27 | const char *src; | |
28f540f4 | 28 | { |
c84142e8 UD |
29 | char *s1 = dest; |
30 | const char *s2 = src; | |
28f540f4 RM |
31 | reg_char c; |
32 | ||
33 | /* Find the end of the string. */ | |
34 | do | |
35 | c = *s1++; | |
36 | while (c != '\0'); | |
37 | ||
38 | /* Make S1 point before the next character, so we can increment | |
39 | it while memory is read (wins on pipelined cpus). */ | |
40 | s1 -= 2; | |
41 | ||
42 | do | |
43 | { | |
44 | c = *s2++; | |
45 | *++s1 = c; | |
46 | } | |
47 | while (c != '\0'); | |
48 | ||
49 | return dest; | |
50 | } | |
85dd1003 | 51 | libc_hidden_builtin_def (strcat) |