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6fd435485f
If we want to further optimize the functions tests are needed. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* __simple_dl_elf_hash for testing true elf symbol lookup.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SIMPLE_DL_ELF_HASH_H
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#define _SIMPLE_DL_ELF_HASH_H 1
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#include <stdint.h>
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/* For testing/benchmarking purposes. Real implementation in
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sysdeps/generic/dl-hash.h. */
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static uint32_t
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__attribute__ ((unused))
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__simple_dl_elf_hash (const char *name_arg)
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{
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unsigned long int hash = 0;
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for (unsigned char c = *name_arg; c != '\0'; c = *(++name_arg))
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{
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unsigned long int hi;
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hash = (hash << 4) + c;
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hi = hash & 0xf0000000;
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hash ^= hi >> 24;
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hash &= 0x0fffffff;
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}
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return hash;
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}
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#endif /* simple-dl-hash.h */
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