mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 17:11:06 +00:00
b54e5d1c92
These functions are about to be added to POSIX, under Austin Group issue 986. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/* Copy a null-terminated wide string to a fixed-size buffer.
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <wchar.h>
|
|
|
|
size_t
|
|
__wcslcpy (wchar_t *__restrict dest, const wchar_t *__restrict src, size_t size)
|
|
{
|
|
size_t src_length = __wcslen (src);
|
|
|
|
if (__glibc_unlikely (src_length >= size))
|
|
{
|
|
if (size > 0)
|
|
{
|
|
/* Copy the leading portion of the string. The last
|
|
character is subsequently overwritten with the null
|
|
terminator, but the destination size is usually a
|
|
multiple of a small power of two, so writing it twice
|
|
should be more efficient than copying an odd number of
|
|
character. */
|
|
__wmemcpy (dest, src, size);
|
|
dest[size - 1] = '\0';
|
|
}
|
|
}
|
|
else
|
|
/* Copy the string and its terminating null character. */
|
|
__wmemcpy (dest, src, src_length + 1);
|
|
return src_length;
|
|
}
|
|
libc_hidden_def (__wcslcpy)
|
|
weak_alias (__wcslcpy, wcslcpy)
|