428
+ − 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
442
+ − 30 Here is a correct version from, glibc 1.09.
428
+ − 31 */
+ − 32
+ − 33 char *strcat (char *dest, const char *src);
+ − 34
+ − 35 /* Append SRC on the end of DEST. */
+ − 36 char *
+ − 37 strcat (char *dest, const char *src)
+ − 38 {
+ − 39 REGISTER char *s1 = dest;
442
+ − 40 REGISTER const char *s2 = src;
428
+ − 41 char c;
+ − 42
+ − 43 /* Find the end of the string. */
+ − 44 do
+ − 45 c = *s1++;
+ − 46 while (c != '\0');
+ − 47
+ − 48 /* Make S1 point before the next character, so we can increment
+ − 49 it while memory is read (wins on pipelined cpus). */
+ − 50 s1 -= 2;
+ − 51
+ − 52 do
+ − 53 {
+ − 54 c = *s2++;
+ − 55 *++s1 = c;
+ − 56 }
+ − 57 while (c != '\0');
+ − 58
+ − 59 return dest;
+ − 60 }
