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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/generic/dl-hash.h | |
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/generic/dl-hash.h')
-rw-r--r-- | sysdeps/generic/dl-hash.h | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/sysdeps/generic/dl-hash.h b/sysdeps/generic/dl-hash.h deleted file mode 100644 index 4524381647..0000000000 --- a/sysdeps/generic/dl-hash.h +++ /dev/null @@ -1,75 +0,0 @@ -/* Compute hash value for given string according to ELF standard. - Copyright (C) 1995-2017 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/>. */ - -#ifndef _DL_HASH_H -#define _DL_HASH_H 1 - - -/* This is the hashing function specified by the ELF ABI. In the - first five operations no overflow is possible so we optimized it a - bit. */ -static unsigned int -__attribute__ ((unused)) -_dl_elf_hash (const char *name_arg) -{ - const unsigned char *name = (const unsigned char *) name_arg; - unsigned long int hash = *name; - if (hash != 0 && name[1] != '\0') - { - hash = (hash << 4) + name[1]; - if (name[2] != '\0') - { - hash = (hash << 4) + name[2]; - if (name[3] != '\0') - { - hash = (hash << 4) + name[3]; - if (name[4] != '\0') - { - hash = (hash << 4) + name[4]; - name += 5; - while (*name != '\0') - { - unsigned long int hi; - hash = (hash << 4) + *name++; - hi = hash & 0xf0000000; - - /* The algorithm specified in the ELF ABI is as - follows: - - if (hi != 0) - hash ^= hi >> 24; - - hash &= ~hi; - - But the following is equivalent and a lot - faster, especially on modern processors. */ - - hash ^= hi >> 24; - } - - /* Second part of the modified formula. This - operation can be lifted outside the loop. */ - hash &= 0x0fffffff; - } - } - } - } - return hash; -} - -#endif /* dl-hash.h */ |