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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2009. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*
*/
#include "hash.h"
/* This is hashpjw, from the dragon book */
/* Note that this function is only used as a default hash function.
* All calls are made through the hash pointer in the tab structure.
* The only place this function is explicitly referenced is in
* hash_newtab(); Users can use hash_setfunc() to change the hash function.
*/
int ei_dohash(const char *key)
{
const char *s;
unsigned h = 0;
unsigned g;
for (s=key; *s; s++) {
h = (h << 4) + *s;
if ((g = (h & 0xf0000000))) { /* assumes 32-bit int */
h = h^(g >> 24);
h = h^g;
}
}
return h;
}
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