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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
* Nota bene: later versions of the GNU General Public License do not apply
* to this program.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#define HASHTABLE_INTERNAL
#include "stringhashtable.h"
#include "types.h"
#include "libs/misc.h"
// For unconst()
#include "libs/uio/uioport.h"
static inline uio_uint32 StringHashTable_hash(
StringHashTable_HashTable *hashTable, const char *string);
static inline uio_bool StringHashTable_equal(
StringHashTable_HashTable *hashTable,
const char *key1, const char *key2);
static inline char *StringHashTable_copy(
StringHashTable_HashTable *hashTable, const char *key);
#include "libs/uio/hashtable.c"
static inline uio_uint32
StringHashTable_hash(StringHashTable_HashTable *hashTable, const char *key) {
uio_uint32 hash;
(void) hashTable;
// Rotating hash, variation of something on the web which
// wasn't original itself.
hash = 0;
// Hash was on that web page initialised as the length,
// but that isn't known at this time.
while (*key != '\0') {
hash = (hash << 4) ^ (hash >> 28) ^ *key;
key++;
}
return hash ^ (hash >> 10) ^ (hash >> 20);
}
static inline uio_bool
StringHashTable_equal(StringHashTable_HashTable *hashTable,
const char *key1, const char *key2) {
(void) hashTable;
return strcmp(key1, key2) == 0;
}
static inline char *
StringHashTable_copy(StringHashTable_HashTable *hashTable,
const char *key) {
(void) hashTable;
return unconst(key);
}
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