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authortlatorre <tlatorre@uchicago.edu>2018-08-14 10:08:27 -0500
committertlatorre <tlatorre@uchicago.edu>2018-08-14 10:08:27 -0500
commit24c8bcfe7f76b20124e2862ea050f815c0f768e7 (patch)
treee5bdbd638a2c7f38f1c094cc9e95cbdfe05b9481 /dict.h
parent0b7f199c0d93074484ea580504485a32dc29f5e2 (diff)
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move everything to src directory
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-/* Hash Tables Implementation.
- *
- * This file implements in-memory hash tables with insert/del/replace/find/
- * get-random-element operations. Hash tables will auto-resize if needed
- * tables of power of two in size are used, collisions are handled by
- * chaining. See the source code for more information... :)
- *
- * Copyright (c) 2006-2012, Salvatore Sanfilippo <antirez at gmail dot com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of Redis nor the names of its contributors may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdint.h>
-#include <stdlib.h>
-
-#ifndef __DICT_H
-#define __DICT_H
-
-#define DICT_OK 0
-#define DICT_ERR 1
-
-/* Unused arguments generate annoying warnings... */
-#define DICT_NOTUSED(V) ((void) V)
-
-typedef struct dictEntry {
- void *key;
- union {
- void *val;
- uint64_t u64;
- int64_t s64;
- double d;
- } v;
- struct dictEntry *next;
-} dictEntry;
-
-typedef struct dictType {
- uint64_t (*hashFunction)(const void *key);
- void *(*keyDup)(void *privdata, const void *key);
- void *(*valDup)(void *privdata, const void *obj);
- int (*keyCompare)(void *privdata, const void *key1, const void *key2);
- void (*keyDestructor)(void *privdata, void *key);
- void (*valDestructor)(void *privdata, void *obj);
-} dictType;
-
-/* This is our hash table structure. Every dictionary has two of this as we
- * implement incremental rehashing, for the old to the new table. */
-typedef struct dictht {
- dictEntry **table;
- unsigned long size;
- unsigned long sizemask;
- unsigned long used;
-} dictht;
-
-typedef struct dict {
- dictType *type;
- void *privdata;
- dictht ht[2];
- long rehashidx; /* rehashing not in progress if rehashidx == -1 */
- unsigned long iterators; /* number of iterators currently running */
-} dict;
-
-/* If safe is set to 1 this is a safe iterator, that means, you can call
- * dictAdd, dictFind, and other functions against the dictionary even while
- * iterating. Otherwise it is a non safe iterator, and only dictNext()
- * should be called while iterating. */
-typedef struct dictIterator {
- dict *d;
- long index;
- int table, safe;
- dictEntry *entry, *nextEntry;
- /* unsafe iterator fingerprint for misuse detection. */
- long long fingerprint;
-} dictIterator;
-
-typedef void (dictScanFunction)(void *privdata, const dictEntry *de);
-typedef void (dictScanBucketFunction)(void *privdata, dictEntry **bucketref);
-
-/* This is the initial size of every hash table */
-#define DICT_HT_INITIAL_SIZE 4
-
-/* ------------------------------- Macros ------------------------------------*/
-#define dictFreeVal(d, entry) \
- if ((d)->type->valDestructor) \
- (d)->type->valDestructor((d)->privdata, (entry)->v.val)
-
-#define dictSetVal(d, entry, _val_) do { \
- if ((d)->type->valDup) \
- (entry)->v.val = (d)->type->valDup((d)->privdata, _val_); \
- else \
- (entry)->v.val = (_val_); \
-} while(0)
-
-#define dictSetSignedIntegerVal(entry, _val_) \
- do { (entry)->v.s64 = _val_; } while(0)
-
-#define dictSetUnsignedIntegerVal(entry, _val_) \
- do { (entry)->v.u64 = _val_; } while(0)
-
-#define dictSetDoubleVal(entry, _val_) \
- do { (entry)->v.d = _val_; } while(0)
-
-#define dictFreeKey(d, entry) \
- if ((d)->type->keyDestructor) \
- (d)->type->keyDestructor((d)->privdata, (entry)->key)
-
-#define dictSetKey(d, entry, _key_) do { \
- if ((d)->type->keyDup) \
- (entry)->key = (d)->type->keyDup((d)->privdata, _key_); \
- else \
- (entry)->key = (_key_); \
-} while(0)
-
-#define dictCompareKeys(d, key1, key2) \
- (((d)->type->keyCompare) ? \
- (d)->type->keyCompare((d)->privdata, key1, key2) : \
- (key1) == (key2))
-
-#define dictHashKey(d, key) (d)->type->hashFunction(key)
-#define dictGetKey(he) ((he)->key)
-#define dictGetVal(he) ((he)->v.val)
-#define dictGetSignedIntegerVal(he) ((he)->v.s64)
-#define dictGetUnsignedIntegerVal(he) ((he)->v.u64)
-#define dictGetDoubleVal(he) ((he)->v.d)
-#define dictSlots(d) ((d)->ht[0].size+(d)->ht[1].size)
-#define dictSize(d) ((d)->ht[0].used+(d)->ht[1].used)
-#define dictIsRehashing(d) ((d)->rehashidx != -1)
-
-/* API */
-dict *dictCreate(dictType *type, void *privDataPtr);
-int dictExpand(dict *d, unsigned long size);
-int dictAdd(dict *d, void *key, void *val);
-dictEntry *dictAddRaw(dict *d, void *key, dictEntry **existing);
-dictEntry *dictAddOrFind(dict *d, void *key);
-int dictReplace(dict *d, void *key, void *val);
-int dictDelete(dict *d, const void *key);
-dictEntry *dictUnlink(dict *ht, const void *key);
-void dictFreeUnlinkedEntry(dict *d, dictEntry *he);
-void dictRelease(dict *d);
-dictEntry * dictFind(dict *d, const void *key);
-void *dictFetchValue(dict *d, const void *key);
-int dictResize(dict *d);
-dictIterator *dictGetIterator(dict *d);
-dictIterator *dictGetSafeIterator(dict *d);
-dictEntry *dictNext(dictIterator *iter);
-void dictReleaseIterator(dictIterator *iter);
-dictEntry *dictGetRandomKey(dict *d);
-unsigned int dictGetSomeKeys(dict *d, dictEntry **des, unsigned int count);
-void dictGetStats(char *buf, size_t bufsize, dict *d);
-uint64_t dictGenHashFunction(const void *key, int len);
-uint64_t dictGenCaseHashFunction(const unsigned char *buf, int len);
-void dictEmpty(dict *d, void(callback)(void*));
-void dictEnableResize(void);
-void dictDisableResize(void);
-int dictRehash(dict *d, int n);
-int dictRehashMilliseconds(dict *d, int ms);
-void dictSetHashFunctionSeed(uint8_t *seed);
-uint8_t *dictGetHashFunctionSeed(void);
-unsigned long dictScan(dict *d, unsigned long v, dictScanFunction *fn, dictScanBucketFunction *bucketfn, void *privdata);
-uint64_t dictGetHash(dict *d, const void *key);
-dictEntry **dictFindEntryRefByPtrAndHash(dict *d, const void *oldptr, uint64_t hash);
-
-/* Hash table types */
-extern dictType dictTypeHeapStringCopyKey;
-extern dictType dictTypeHeapStrings;
-extern dictType dictTypeHeapStringCopyKeyValue;
-
-#endif /* __DICT_H */