зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
2.6 KiB
C
112 строки
2.6 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public
|
|
* License Version 1.1 (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.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
/* This file holds a temporary implementation of hash tables. It will
|
|
be replaced with STL or NSPR
|
|
*/
|
|
|
|
#include "rdf-int.h"
|
|
|
|
typedef struct _HashEntryStruct {
|
|
struct _HashEntryStruct* next; /* hash chain linkage */
|
|
char* key;
|
|
void* value;
|
|
} HashEntryStruct;
|
|
|
|
typedef HashEntryStruct* HashEntry;
|
|
|
|
typedef struct _HashTableStruct {
|
|
int size;
|
|
HashEntry* buckets; /* vector of hash buckets */
|
|
} HashTableStruct;
|
|
|
|
|
|
|
|
int
|
|
hashKey (HashTable ht, char* key) {
|
|
size_t len = strlen(key);
|
|
int sum = 0;
|
|
size_t n = 0;
|
|
int ans;
|
|
for (n = 0; n < len; n++) sum = sum + (int)key[n];
|
|
ans = sum & ht->size;
|
|
if (ans == ht->size) ans = ans-1;
|
|
return ans;
|
|
}
|
|
|
|
HashTable
|
|
NewHashTable(int size) {
|
|
HashTable ht = (HashTable)getMem(sizeof(HashTableStruct));
|
|
ht->size = size;
|
|
ht->buckets = (HashEntry*)getMem(sizeof(HashEntry) * size);
|
|
return ht;
|
|
}
|
|
|
|
void*
|
|
HashLookup(HashTable ht, char* key) {
|
|
int offset = hashKey(ht, key);
|
|
HashEntry he = ht->buckets[offset];
|
|
while (he) {
|
|
if (strcmp(he->key, key) == 0) return he->value;
|
|
he = he->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int catCount = 0;
|
|
int itemCount = 0;
|
|
|
|
void
|
|
HashAdd (HashTable ht, char* key, void* value) {
|
|
int offset = hashKey(ht, key);
|
|
HashEntry he = ht->buckets[offset];
|
|
HashEntry prev = he;
|
|
while (he) {
|
|
if (strcmp(he->key, key) == 0) {
|
|
if (value == he->value) {
|
|
return;
|
|
} else {
|
|
he->value = value;
|
|
return;
|
|
}
|
|
}
|
|
prev = he;
|
|
he = he->next;
|
|
}
|
|
if (startsWith("http://", key)) {
|
|
itemCount++;
|
|
} else {
|
|
catCount++;
|
|
}
|
|
he = (HashEntry) fgetMem(sizeof(HashEntryStruct));
|
|
he->value = value;
|
|
he->key = key;
|
|
if (prev) {
|
|
prev->next = he;
|
|
} else {
|
|
ht->buckets[offset] = he;
|
|
}
|
|
}
|
|
|
|
|
|
|