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/* Things needed for both reading and writing DWARF indices.
Copyright (C) 1994-2023 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "dwarf2/index-common.h"
/* See dwarf-index-common.h. */
hashval_t
mapped_index_string_hash (int index_version, const void *p)
{
const unsigned char *str = (const unsigned char *) p;
hashval_t r = 0;
unsigned char c;
while ((c = *str++) != 0)
{
if (index_version >= 5)
c = tolower (c);
r = r * 67 + c - 113;
}
return r;
}
/* See dwarf-index-common.h. */
uint32_t
dwarf5_djb_hash (const char *str_)
{
const unsigned char *str = (const unsigned char *) str_;
/* Note: tolower here ignores UTF-8, which isn't fully compliant.
See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */
uint32_t hash = 5381;
while (int c = *str++)
hash = hash * 33 + tolower (c);
return hash;
}
/* See dwarf-index-common.h. */
uint32_t
dwarf5_djb_hash (gdb::string_view str)
{
/* Note: tolower here ignores UTF-8, which isn't fully compliant.
See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */
uint32_t hash = 5381;
for (char c : str)
hash = hash * 33 + tolower (c & 0xff);
return hash;
}
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