glibc/wcsmbs/wcsncmp.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

70 lines
1.8 KiB
C

/* Copyright (C) 1995-2022 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>
#ifndef WCSNCMP
# define WCSNCMP wcsncmp
#endif
/* Compare no more than N characters of S1 and S2,
returning less than, equal to or greater than zero
if S1 is lexicographically less than, equal to or
greater than S2. */
int
WCSNCMP (const wchar_t *s1, const wchar_t *s2, size_t n)
{
wchar_t c1 = L'\0';
wchar_t c2 = L'\0';
if (n >= 4)
{
size_t n4 = n >> 2;
do
{
c1 = *s1++;
c2 = *s2++;
if (c1 == L'\0' || c1 != c2)
return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
c1 = *s1++;
c2 = *s2++;
if (c1 == L'\0' || c1 != c2)
return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
c1 = *s1++;
c2 = *s2++;
if (c1 == L'\0' || c1 != c2)
return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
c1 = *s1++;
c2 = *s2++;
if (c1 == L'\0' || c1 != c2)
return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
} while (--n4 > 0);
n &= 3;
}
while (n > 0)
{
c1 = *s1++;
c2 = *s2++;
if (c1 == L'\0' || c1 != c2)
return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
n--;
}
return 0;
}