mirror of
https://github.com/fluencelabs/redis
synced 2025-03-18 16:40:50 +00:00
wrapper functions for the set type to support multiple encodings
This commit is contained in:
Pieter Noordhuis
parent
3ab98cef4e
commit
35cabcb505
282
redis.c
282
redis.c
@ -3064,7 +3064,9 @@ static robj *createZiplistObject(void) {
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static robj *createSetObject(void) {
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dict *d = dictCreate(&setDictType,NULL);
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return createObject(REDIS_SET,d);
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robj *o = createObject(REDIS_SET,d);
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o->encoding = REDIS_ENCODING_HT;
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return o;
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}
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static robj *createHashObject(void) {
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@ -5457,6 +5459,99 @@ static void rpoplpushcommand(redisClient *c) {
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/* ==================================== Sets ================================ */
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static int setTypeAdd(robj *subject, robj *value) {
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if (subject->encoding == REDIS_ENCODING_HT) {
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if (dictAdd(subject->ptr,value,NULL) == DICT_OK) {
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incrRefCount(value);
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return 1;
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}
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} else {
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redisPanic("Unknown set encoding");
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}
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return 0;
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}
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static int setTypeRemove(robj *subject, robj *value) {
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if (subject->encoding == REDIS_ENCODING_HT) {
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if (dictDelete(subject->ptr,value) == DICT_OK) {
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if (htNeedsResize(subject->ptr)) dictResize(subject->ptr);
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return 1;
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}
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} else {
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redisPanic("Unknown set encoding");
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}
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return 0;
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}
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static int setTypeIsMember(robj *subject, robj *value) {
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if (subject->encoding == REDIS_ENCODING_HT) {
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return dictFind((dict*)subject->ptr,value) != NULL;
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} else {
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redisPanic("Unknown set encoding");
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}
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}
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/* Structure to hold set iteration abstraction. */
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typedef struct {
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int encoding;
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dictIterator *di;
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} setIterator;
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static setIterator *setTypeInitIterator(robj *subject) {
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setIterator *si = zmalloc(sizeof(setIterator));
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si->encoding = subject->encoding;
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if (si->encoding == REDIS_ENCODING_HT) {
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si->di = dictGetIterator(subject->ptr);
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} else {
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redisPanic("Unknown set encoding");
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}
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return si;
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}
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static void setTypeReleaseIterator(setIterator *si) {
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if (si->encoding == REDIS_ENCODING_HT)
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dictReleaseIterator(si->di);
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zfree(si);
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}
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/* Move to the next entry in the set. Returns the object at the current
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* position, or NULL when the end is reached. This object will have its
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* refcount incremented, so the caller needs to take care of this. */
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static robj *setTypeNext(setIterator *si) {
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robj *ret = NULL;
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if (si->encoding == REDIS_ENCODING_HT) {
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dictEntry *de = dictNext(si->di);
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if (de != NULL) {
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ret = dictGetEntryKey(de);
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incrRefCount(ret);
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}
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}
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return ret;
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}
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/* Return random element from set. The returned object will always have
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* an incremented refcount. */
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robj *setTypeRandomElement(robj *subject) {
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robj *ret = NULL;
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if (subject->encoding == REDIS_ENCODING_HT) {
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dictEntry *de = dictGetRandomKey(subject->ptr);
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ret = dictGetEntryKey(de);
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incrRefCount(ret);
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} else {
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redisPanic("Unknown set encoding");
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}
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return ret;
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}
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static unsigned long setTypeSize(robj *subject) {
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if (subject->encoding == REDIS_ENCODING_HT) {
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return dictSize((dict*)subject->ptr);
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} else {
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redisPanic("Unknown set encoding");
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}
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}
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static void saddCommand(redisClient *c) {
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robj *set;
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@ -5470,8 +5565,7 @@ static void saddCommand(redisClient *c) {
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return;
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}
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}
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if (dictAdd(set->ptr,c->argv[2],NULL) == DICT_OK) {
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incrRefCount(c->argv[2]);
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if (setTypeAdd(set,c->argv[2])) {
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server.dirty++;
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addReply(c,shared.cone);
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} else {
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@ -5485,10 +5579,9 @@ static void sremCommand(redisClient *c) {
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if ((set = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
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checkType(c,set,REDIS_SET)) return;
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if (dictDelete(set->ptr,c->argv[2]) == DICT_OK) {
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if (setTypeRemove(set,c->argv[2])) {
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if (setTypeSize(set) == 0) dbDelete(c->db,c->argv[1]);
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server.dirty++;
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if (htNeedsResize(set->ptr)) dictResize(set->ptr);
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if (dictSize((dict*)set->ptr) == 0) dbDelete(c->db,c->argv[1]);
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addReply(c,shared.cone);
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} else {
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addReply(c,shared.czero);
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@ -5513,12 +5606,12 @@ static void smoveCommand(redisClient *c) {
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return;
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}
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/* Remove the element from the source set */
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if (dictDelete(srcset->ptr,c->argv[3]) == DICT_ERR) {
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if (!setTypeRemove(srcset,c->argv[3])) {
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/* Key not found in the src set! return zero */
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addReply(c,shared.czero);
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return;
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}
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if (dictSize((dict*)srcset->ptr) == 0 && srcset != dstset)
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if (setTypeSize(srcset) == 0 && srcset != dstset)
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dbDelete(c->db,c->argv[1]);
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server.dirty++;
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/* Add the element to the destination set */
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@ -5526,8 +5619,7 @@ static void smoveCommand(redisClient *c) {
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dstset = createSetObject();
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dbAdd(c->db,c->argv[2],dstset);
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}
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if (dictAdd(dstset->ptr,c->argv[3],NULL) == DICT_OK)
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incrRefCount(c->argv[3]);
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setTypeAdd(dstset,c->argv[3]);
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addReply(c,shared.cone);
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}
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@ -5537,7 +5629,7 @@ static void sismemberCommand(redisClient *c) {
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if ((set = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
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checkType(c,set,REDIS_SET)) return;
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if (dictFind(set->ptr,c->argv[2]))
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if (setTypeIsMember(set,c->argv[2]))
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addReply(c,shared.cone);
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else
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addReply(c,shared.czero);
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@ -5545,74 +5637,62 @@ static void sismemberCommand(redisClient *c) {
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static void scardCommand(redisClient *c) {
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robj *o;
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dict *s;
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if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
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checkType(c,o,REDIS_SET)) return;
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s = o->ptr;
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addReplyUlong(c,dictSize(s));
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addReplyUlong(c,setTypeSize(o));
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}
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static void spopCommand(redisClient *c) {
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robj *set;
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dictEntry *de;
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robj *set, *ele;
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if ((set = lookupKeyWriteOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
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checkType(c,set,REDIS_SET)) return;
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de = dictGetRandomKey(set->ptr);
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if (de == NULL) {
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ele = setTypeRandomElement(set);
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if (ele == NULL) {
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addReply(c,shared.nullbulk);
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} else {
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robj *ele = dictGetEntryKey(de);
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setTypeRemove(set,ele);
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addReplyBulk(c,ele);
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dictDelete(set->ptr,ele);
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if (htNeedsResize(set->ptr)) dictResize(set->ptr);
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if (dictSize((dict*)set->ptr) == 0) dbDelete(c->db,c->argv[1]);
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decrRefCount(ele);
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if (setTypeSize(set) == 0) dbDelete(c->db,c->argv[1]);
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server.dirty++;
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}
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}
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static void srandmemberCommand(redisClient *c) {
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robj *set;
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dictEntry *de;
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robj *set, *ele;
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if ((set = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
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checkType(c,set,REDIS_SET)) return;
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de = dictGetRandomKey(set->ptr);
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if (de == NULL) {
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ele = setTypeRandomElement(set);
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if (ele == NULL) {
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addReply(c,shared.nullbulk);
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} else {
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robj *ele = dictGetEntryKey(de);
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addReplyBulk(c,ele);
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decrRefCount(ele);
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}
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}
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static int qsortCompareSetsByCardinality(const void *s1, const void *s2) {
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dict **d1 = (void*) s1, **d2 = (void*) s2;
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return dictSize(*d1)-dictSize(*d2);
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return setTypeSize(*(robj**)s1)-setTypeSize(*(robj**)s2);
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}
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static void sinterGenericCommand(redisClient *c, robj **setskeys, unsigned long setsnum, robj *dstkey) {
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dict **dv = zmalloc(sizeof(dict*)*setsnum);
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dictIterator *di;
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dictEntry *de;
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robj *lenobj = NULL, *dstset = NULL;
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static void sinterGenericCommand(redisClient *c, robj **setkeys, unsigned long setnum, robj *dstkey) {
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robj **sets = zmalloc(sizeof(robj*)*setnum);
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setIterator *si;
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robj *ele, *lenobj = NULL, *dstset = NULL;
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unsigned long j, cardinality = 0;
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for (j = 0; j < setsnum; j++) {
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robj *setobj;
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setobj = dstkey ?
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lookupKeyWrite(c->db,setskeys[j]) :
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lookupKeyRead(c->db,setskeys[j]);
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for (j = 0; j < setnum; j++) {
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robj *setobj = dstkey ?
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lookupKeyWrite(c->db,setkeys[j]) :
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lookupKeyRead(c->db,setkeys[j]);
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if (!setobj) {
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zfree(dv);
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zfree(sets);
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if (dstkey) {
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if (dbDelete(c->db,dstkey))
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server.dirty++;
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@ -5622,16 +5702,15 @@ static void sinterGenericCommand(redisClient *c, robj **setskeys, unsigned long
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}
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return;
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}
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if (setobj->type != REDIS_SET) {
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zfree(dv);
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addReply(c,shared.wrongtypeerr);
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if (checkType(c,setobj,REDIS_SET)) {
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zfree(sets);
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return;
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}
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dv[j] = setobj->ptr;
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sets[j] = setobj;
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}
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/* Sort sets from the smallest to largest, this will improve our
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* algorithm's performace */
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qsort(dv,setsnum,sizeof(dict*),qsortCompareSetsByCardinality);
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qsort(sets,setnum,sizeof(robj*),qsortCompareSetsByCardinality);
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/* The first thing we should output is the total number of elements...
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* since this is a multi-bulk write, but at this stage we don't know
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@ -5651,33 +5730,31 @@ static void sinterGenericCommand(redisClient *c, robj **setskeys, unsigned long
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/* Iterate all the elements of the first (smallest) set, and test
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* the element against all the other sets, if at least one set does
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* not include the element it is discarded */
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di = dictGetIterator(dv[0]);
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si = setTypeInitIterator(sets[0]);
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while((ele = setTypeNext(si)) != NULL) {
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for (j = 1; j < setnum; j++)
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if (!setTypeIsMember(sets[j],ele)) break;
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while((de = dictNext(di)) != NULL) {
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robj *ele;
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for (j = 1; j < setsnum; j++)
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if (dictFind(dv[j],dictGetEntryKey(de)) == NULL) break;
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if (j != setsnum)
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continue; /* at least one set does not contain the member */
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ele = dictGetEntryKey(de);
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if (!dstkey) {
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addReplyBulk(c,ele);
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cardinality++;
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} else {
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dictAdd(dstset->ptr,ele,NULL);
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incrRefCount(ele);
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/* Only take action when all sets contain the member */
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if (j == setnum) {
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if (!dstkey) {
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addReplyBulk(c,ele);
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cardinality++;
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} else {
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setTypeAdd(dstset,ele);
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}
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}
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decrRefCount(ele);
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}
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dictReleaseIterator(di);
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setTypeReleaseIterator(si);
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if (dstkey) {
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/* Store the resulting set into the target, if the intersection
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* is not an empty set. */
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dbDelete(c->db,dstkey);
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if (dictSize((dict*)dstset->ptr) > 0) {
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if (setTypeSize(dstset) > 0) {
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dbAdd(c->db,dstkey,dstset);
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addReplyLongLong(c,dictSize((dict*)dstset->ptr));
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addReplyLongLong(c,setTypeSize(dstset));
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} else {
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decrRefCount(dstset);
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addReply(c,shared.czero);
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@ -5686,7 +5763,7 @@ static void sinterGenericCommand(redisClient *c, robj **setskeys, unsigned long
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} else {
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lenobj->ptr = sdscatprintf(sdsempty(),"*%lu\r\n",cardinality);
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}
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zfree(dv);
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zfree(sets);
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}
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static void sinterCommand(redisClient *c) {
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@ -5701,29 +5778,25 @@ static void sinterstoreCommand(redisClient *c) {
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#define REDIS_OP_DIFF 1
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#define REDIS_OP_INTER 2
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static void sunionDiffGenericCommand(redisClient *c, robj **setskeys, int setsnum, robj *dstkey, int op) {
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dict **dv = zmalloc(sizeof(dict*)*setsnum);
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dictIterator *di;
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dictEntry *de;
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robj *dstset = NULL;
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static void sunionDiffGenericCommand(redisClient *c, robj **setkeys, int setnum, robj *dstkey, int op) {
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robj **sets = zmalloc(sizeof(robj*)*setnum);
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setIterator *si;
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robj *ele, *dstset = NULL;
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int j, cardinality = 0;
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for (j = 0; j < setsnum; j++) {
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robj *setobj;
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setobj = dstkey ?
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lookupKeyWrite(c->db,setskeys[j]) :
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lookupKeyRead(c->db,setskeys[j]);
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for (j = 0; j < setnum; j++) {
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robj *setobj = dstkey ?
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lookupKeyWrite(c->db,setkeys[j]) :
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lookupKeyRead(c->db,setkeys[j]);
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if (!setobj) {
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dv[j] = NULL;
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sets[j] = NULL;
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continue;
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}
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if (setobj->type != REDIS_SET) {
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zfree(dv);
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addReply(c,shared.wrongtypeerr);
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if (checkType(c,setobj,REDIS_SET)) {
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zfree(sets);
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return;
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}
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dv[j] = setobj->ptr;
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sets[j] = setobj;
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}
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/* We need a temp set object to store our union. If the dstkey
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@ -5733,60 +5806,53 @@ static void sunionDiffGenericCommand(redisClient *c, robj **setskeys, int setsnu
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/* Iterate all the elements of all the sets, add every element a single
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* time to the result set */
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for (j = 0; j < setsnum; j++) {
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if (op == REDIS_OP_DIFF && j == 0 && !dv[j]) break; /* result set is empty */
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if (!dv[j]) continue; /* non existing keys are like empty sets */
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for (j = 0; j < setnum; j++) {
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if (op == REDIS_OP_DIFF && j == 0 && !sets[j]) break; /* result set is empty */
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if (!sets[j]) continue; /* non existing keys are like empty sets */
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di = dictGetIterator(dv[j]);
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while((de = dictNext(di)) != NULL) {
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robj *ele;
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/* dictAdd will not add the same element multiple times */
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ele = dictGetEntryKey(de);
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si = setTypeInitIterator(sets[j]);
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while((ele = setTypeNext(si)) != NULL) {
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if (op == REDIS_OP_UNION || j == 0) {
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if (dictAdd(dstset->ptr,ele,NULL) == DICT_OK) {
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incrRefCount(ele);
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if (setTypeAdd(dstset,ele)) {
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cardinality++;
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}
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} else if (op == REDIS_OP_DIFF) {
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if (dictDelete(dstset->ptr,ele) == DICT_OK) {
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if (setTypeRemove(dstset,ele)) {
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cardinality--;
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}
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}
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decrRefCount(ele);
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}
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dictReleaseIterator(di);
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setTypeReleaseIterator(si);
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/* result set is empty? Exit asap. */
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/* Exit when result set is empty. */
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if (op == REDIS_OP_DIFF && cardinality == 0) break;
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}
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/* Output the content of the resulting set, if not in STORE mode */
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if (!dstkey) {
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addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",cardinality));
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di = dictGetIterator(dstset->ptr);
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while((de = dictNext(di)) != NULL) {
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robj *ele;
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ele = dictGetEntryKey(de);
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si = setTypeInitIterator(dstset);
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while((ele = setTypeNext(si)) != NULL) {
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addReplyBulk(c,ele);
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decrRefCount(ele);
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}
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dictReleaseIterator(di);
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setTypeReleaseIterator(si);
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decrRefCount(dstset);
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} else {
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/* If we have a target key where to store the resulting set
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* create this key with the result set inside */
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dbDelete(c->db,dstkey);
|
||||
if (dictSize((dict*)dstset->ptr) > 0) {
|
||||
if (setTypeSize(dstset) > 0) {
|
||||
dbAdd(c->db,dstkey,dstset);
|
||||
addReplyLongLong(c,dictSize((dict*)dstset->ptr));
|
||||
addReplyLongLong(c,setTypeSize(dstset));
|
||||
} else {
|
||||
decrRefCount(dstset);
|
||||
addReply(c,shared.czero);
|
||||
}
|
||||
server.dirty++;
|
||||
}
|
||||
zfree(dv);
|
||||
zfree(sets);
|
||||
}
|
||||
|
||||
static void sunionCommand(redisClient *c) {
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user