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authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /debug/wcscat_chk.c
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
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2.5-18.1
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-rw-r--r--debug/wcscat_chk.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/debug/wcscat_chk.c b/debug/wcscat_chk.c
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+/* Copyright (C) 1995, 1996, 1997, 2001, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <wchar.h>
+
+
+/* Append SRC on the end of DEST. Check for overflows. */
+wchar_t *
+__wcscat_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
+{
+ register wchar_t *s1 = dest;
+ register const wchar_t *s2 = src;
+ wchar_t c;
+
+ /* Find the end of the string. */
+ do
+ {
+ if (__builtin_expect (destlen-- == 0, 0))
+ __chk_fail ();
+ 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;
+ ++destlen;
+
+ do
+ {
+ if (__builtin_expect (destlen-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ }
+ while (c != L'\0');
+
+ return dest;
+}