147 lines
3.6 KiB
C++
147 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "prmem.h"
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#include "nsHash.h"
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//
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// Key operations
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//
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static PR_CALLBACK PLHashNumber _hashValue(const void *key)
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{
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return ((const nsHashKey *) key)->HashValue();
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}
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static PR_CALLBACK PRIntn _hashKeyCompare(const void *key1, const void *key2) {
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return ((const nsHashKey *) key1)->Equals((const nsHashKey *) key2);
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}
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static PR_CALLBACK PRIntn _hashValueCompare(const void *value1,
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const void *value2) {
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// We're not going to make any assumptions about value equality
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return 0;
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}
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//
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// Memory callbacks
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//
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static PR_CALLBACK void *_hashAllocTable(void *pool, PRSize size) {
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return PR_MALLOC(size);
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}
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static PR_CALLBACK void _hashFreeTable(void *pool, void *item) {
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PR_DELETE(item);
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}
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static PR_CALLBACK PLHashEntry *_hashAllocEntry(void *pool, const void *key) {
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return PR_NEW(PLHashEntry);
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}
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static PR_CALLBACK void _hashFreeEntry(void *pool, PLHashEntry *entry,
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PRUintn flag) {
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if (flag == HT_FREE_ENTRY) {
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delete (nsHashKey *) (entry->key);
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PR_DELETE(entry);
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}
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}
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static PLHashAllocOps _hashAllocOps = {
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_hashAllocTable, _hashFreeTable,
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_hashAllocEntry, _hashFreeEntry
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};
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//
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// Enumerator callback
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//
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static PR_CALLBACK PRIntn _hashEnumerate(PLHashEntry *he, PRIntn i, void *arg)
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{
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return ((nsHashEnumFunc) arg)((nsHashKey *) he->key, he->value) ?
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HT_ENUMERATE_NEXT :
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HT_ENUMERATE_STOP;
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}
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//
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// HashKey
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//
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nsHashKey::nsHashKey(void)
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{
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}
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nsHashKey::~nsHashKey(void)
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{
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}
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nsHash::nsHash(PRUint32 aInitSize) {
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hashtable = PL_NewHashTable(aInitSize,
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_hashValue,
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_hashKeyCompare,
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_hashValueCompare,
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&_hashAllocOps,
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NULL);
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}
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nsHash::~nsHash() {
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PL_HashTableDestroy(hashtable);
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}
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void *nsHash::Put(nsHashKey *aKey, void *aData) {
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void *res = NULL;
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PLHashNumber hash = aKey->HashValue();
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PLHashEntry *he;
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PLHashEntry **hep = PL_HashTableRawLookup(hashtable, hash, (void *) aKey);
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if ((he = *hep) != NULL) {
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res = he->value;
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he->value = aData;
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} else {
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PL_HashTableRawAdd(hashtable, hep, hash,
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(void *) aKey->Clone(), aData);
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}
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return res;
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}
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void *nsHash::Get(nsHashKey *aKey) {
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return PL_HashTableLookup(hashtable, (void *) aKey);
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}
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void *nsHash::Remove(nsHashKey *aKey) {
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PLHashNumber hash = aKey->HashValue();
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PLHashEntry *he;
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PLHashEntry **hep = PL_HashTableRawLookup(hashtable, hash, (void *) aKey);
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void *res = NULL;
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if ((he = *hep) != NULL) {
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res = he->value;
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PL_HashTableRawRemove(hashtable, hep, he);
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}
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return res;
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}
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void nsHash::Enumerate(nsHashEnumFunc aEnumFunc) {
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PL_HashTableEnumerateEntries(hashtable, _hashEnumerate, aEnumFunc);
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}
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