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authorFlorian Weimer <fweimer@redhat.com>2023-06-14 18:10:24 +0200
committerFlorian Weimer <fweimer@redhat.com>2023-06-14 18:10:24 +0200
commitb54e5d1c9257cf1f55f46613aa438bce8fe73d10 (patch)
tree9eb9c7488dee38d204f98a88e154d7bd959490a6 /debug/wcslcat_chk.c
parent454a20c8756c9c1d55419153255fc7692b3d2199 (diff)
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Add the wcslcpy, wcslcat functions
These functions are about to be added to POSIX, under Austin Group
issue 986.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'debug/wcslcat_chk.c')
-rw-r--r--debug/wcslcat_chk.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/debug/wcslcat_chk.c b/debug/wcslcat_chk.c
new file mode 100644
index 0000000000..8ddcc012b1
--- /dev/null
+++ b/debug/wcslcat_chk.c
@@ -0,0 +1,31 @@
+/* Fortified version of wcslcat.
+   Copyright (C) 2023 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 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, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <wchar.h>
+
+/* Check that the user-supplied size does not exceed the
+   compiler-determined size, and then forward to wcslcat.  */
+size_t
+__wcslcat_chk (wchar_t *__restrict s1, const wchar_t *__restrict s2,
+               size_t n, size_t s1len)
+{
+  if (__glibc_unlikely (s1len < n))
+    __chk_fail ();
+
+  return __wcslcat (s1, s2, n);
+}