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71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* Things needed for both reading and writing DWARF indices.
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Copyright (C) 1994-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "dwarf2/index-common.h"
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/* See dwarf-index-common.h. */
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hashval_t
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mapped_index_string_hash (int index_version, const void *p)
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{
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const unsigned char *str = (const unsigned char *) p;
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hashval_t r = 0;
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unsigned char c;
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while ((c = *str++) != 0)
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{
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if (index_version >= 5)
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c = tolower (c);
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r = r * 67 + c - 113;
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}
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return r;
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}
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/* See dwarf-index-common.h. */
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uint32_t
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dwarf5_djb_hash (const char *str_)
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{
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const unsigned char *str = (const unsigned char *) str_;
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/* Note: tolower here ignores UTF-8, which isn't fully compliant.
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See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */
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uint32_t hash = 5381;
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while (int c = *str++)
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hash = hash * 33 + tolower (c);
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return hash;
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}
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/* See dwarf-index-common.h. */
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uint32_t
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dwarf5_djb_hash (gdb::string_view str)
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{
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/* Note: tolower here ignores UTF-8, which isn't fully compliant.
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See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */
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uint32_t hash = 5381;
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for (char c : str)
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hash = hash * 33 + tolower (c & 0xff);
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return hash;
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}
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