mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-28 23:34:53 +03:00
2b778ceb40
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 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/* Copyright (c) 1997-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
|
|
|
|
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 <nss.h>
|
|
|
|
/* This is from libc/db/hash/hash_func.c, hash3 is static there */
|
|
/*
|
|
* This is INCREDIBLY ugly, but fast. We break the string up into 8 byte
|
|
* units. On the first time through the loop we get the "leftover bytes"
|
|
* (strlen % 8). On every other iteration, we perform 8 HASHC's so we handle
|
|
* all 8 bytes. Essentially, this saves us 7 cmp & branch instructions. If
|
|
* this routine is heavily used enough, it's worth the ugly coding.
|
|
*
|
|
* OZ's original sdbm hash
|
|
*/
|
|
uint32_t
|
|
__nss_hash (const void *keyarg, size_t len)
|
|
{
|
|
const unsigned char *key;
|
|
size_t loop;
|
|
uint32_t h;
|
|
|
|
#define HASHC h = *key++ + 65599 * h
|
|
|
|
h = 0;
|
|
key = keyarg;
|
|
if (len > 0)
|
|
{
|
|
loop = (len + 8 - 1) >> 3;
|
|
switch (len & (8 - 1))
|
|
{
|
|
case 0:
|
|
do
|
|
{
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 7:
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 6:
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 5:
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 4:
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 3:
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 2:
|
|
HASHC;
|
|
/* FALLTHROUGH */
|
|
case 1:
|
|
HASHC;
|
|
}
|
|
while (--loop);
|
|
}
|
|
}
|
|
return h;
|
|
}
|
|
|
|
libc_hidden_def (__nss_hash)
|