diff options
Diffstat (limited to 'sysdeps/tile/strnlen.c')
-rw-r--r-- | sysdeps/tile/strnlen.c | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/sysdeps/tile/strnlen.c b/sysdeps/tile/strnlen.c deleted file mode 100644 index c7c72818df..0000000000 --- a/sysdeps/tile/strnlen.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Copyright (C) 2013-2018 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 <string.h> -#include <stdint.h> -#include "string-endian.h" - -/* Find the length of S, but scan at most MAXLEN characters. If no - '\0' terminator is found in that many characters, return MAXLEN. */ -size_t -__strnlen (const char *s, size_t maxlen) -{ - /* When maxlen is 0, can't read any bytes or it might cause a page fault. */ - if (maxlen == 0) - return 0; - - /* Get an aligned pointer. */ - const uintptr_t s_int = (uintptr_t) s; - const uint64_t *p = (const uint64_t *) (s_int & -8); - size_t bytes_read = sizeof (*p) - (s_int & (sizeof (*p) - 1)); - - /* Read and MASK the first word. */ - uint64_t v = *p | MASK (s_int); - - uint64_t bits; - while ((bits = v1cmpeqi (v, 0)) == 0) - { - if (bytes_read >= maxlen) - { - /* Read maxlen bytes and didn't find the terminator. */ - return maxlen; - } - v = *++p; - bytes_read += sizeof (v); - } - - /* Found '\0', check it is not larger than maxlen */ - size_t len = ((const char *) p) + (CFZ (bits) >> 3) - s; - return (len < maxlen ? len : maxlen); -} -libc_hidden_def (__strnlen) -weak_alias (__strnlen, strnlen) -libc_hidden_def (strnlen) |