glibc/sysdeps/x86_64/multiarch/strstr.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

51 lines
1.8 KiB
C

/* Multiple versions of strstr.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2012-2022 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/>. */
/* Redefine strstr so that the compiler won't complain about the type
mismatch with the IFUNC selector in strong_alias, below. */
#undef strstr
#define strstr __redirect_strstr
#include <string.h>
#undef strstr
#define STRSTR __strstr_sse2
#ifdef SHARED
# undef libc_hidden_builtin_def
# define libc_hidden_builtin_def(name) \
__hidden_ver1 (__strstr_sse2, __GI_strstr, __strstr_sse2);
#endif
#include "string/strstr.c"
extern __typeof (__redirect_strstr) __strstr_sse2_unaligned attribute_hidden;
extern __typeof (__redirect_strstr) __strstr_sse2 attribute_hidden;
#include "init-arch.h"
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
extern __typeof (__redirect_strstr) __libc_strstr;
libc_ifunc (__libc_strstr,
HAS_ARCH_FEATURE (Fast_Unaligned_Load)
? __strstr_sse2_unaligned
: __strstr_sse2)
#undef strstr
strong_alias (__libc_strstr, strstr)