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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/tile/tilegx/strnlen.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/tile/tilegx/strnlen.c')
-rw-r--r-- | sysdeps/tile/tilegx/strnlen.c | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/sysdeps/tile/tilegx/strnlen.c b/sysdeps/tile/tilegx/strnlen.c deleted file mode 100644 index 5d73a14926..0000000000 --- a/sysdeps/tile/tilegx/strnlen.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Copyright (C) 2013-2017 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 = __insn_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) |