/* This skiplist implementation is almost a C translation of the original
* algorithm described by William Pugh in "Skip Lists: A Probabilistic
* Alternative to Balanced Trees", modified in three ways:
- * a) this implementation allows for repeated values.
+ * a) this implementation allows for repeated scores.
* b) the comparison is not just by key (our 'score') but by satellite data.
* c) there is a back pointer, so it's a doubly linked list with the back
* pointers being only at "level 1". This allows to traverse the list
zfree(zsl);
}
+/* Returns a random level for the new skiplist node we are going to create.
+ * The return value of this function is between 1 and ZSKIPLIST_MAXLEVEL
+ * (both inclusive), with a powerlaw-alike distribution where higher
+ * levels are less likely to be returned. */
int zslRandomLevel(void) {
int level = 1;
while ((random()&0xFFFF) < (ZSKIPLIST_P * 0xFFFF))
unsigned int rank[ZSKIPLIST_MAXLEVEL];
int i, level;
+ redisAssert(!isnan(score));
x = zsl->header;
for (i = zsl->level-1; i >= 0; i--) {
/* store rank that is crossed to reach the insert position */
return 0; /* not found */
}
-/* Struct to hold a inclusive/exclusive range spec. */
-typedef struct {
- double min, max;
- int minex, maxex; /* are min or max exclusive? */
-} zrangespec;
-
static int zslValueGteMin(double value, zrangespec *spec) {
return spec->minex ? (value > spec->min) : (value >= spec->min);
}
return spec->maxex ? (value < spec->max) : (value <= spec->max);
}
-static int zslValueInRange(double value, zrangespec *spec) {
- return zslValueGteMin(value,spec) && zslValueLteMax(value,spec);
-}
-
/* Returns if there is a part of the zset is in range. */
int zslIsInRange(zskiplist *zsl, zrangespec *range) {
zskiplistNode *x;
x = x->level[i].forward;
}
- /* The tail is in range, so the previous block should always return a
- * node that is non-NULL and the last one to be out of range. */
+ /* This is an inner range, so the next node cannot be NULL. */
x = x->level[0].forward;
- redisAssert(x != NULL && zslValueInRange(x->score,&range));
+ redisAssert(x != NULL);
+
+ /* Check if score <= max. */
+ if (!zslValueLteMax(x->score,&range)) return NULL;
return x;
}
x = x->level[i].forward;
}
- /* The header is in range, so the previous block should always return a
- * node that is non-NULL and in range. */
- redisAssert(x != NULL && zslValueInRange(x->score,&range));
+ /* This is an inner range, so this node cannot be NULL. */
+ redisAssert(x != NULL);
+
+ /* Check if score >= min. */
+ if (!zslValueGteMin(x->score,&range)) return NULL;
return x;
}
return cmp;
}
-unsigned int zzlLength(robj *zobj) {
- unsigned char *zl = zobj->ptr;
+unsigned int zzlLength(unsigned char *zl) {
return ziplistLen(zl)/2;
}
+/* Move to next entry based on the values in eptr and sptr. Both are set to
+ * NULL when there is no next entry. */
+void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr) {
+ unsigned char *_eptr, *_sptr;
+ redisAssert(*eptr != NULL && *sptr != NULL);
+
+ _eptr = ziplistNext(zl,*sptr);
+ if (_eptr != NULL) {
+ _sptr = ziplistNext(zl,_eptr);
+ redisAssert(_sptr != NULL);
+ } else {
+ /* No next entry. */
+ _sptr = NULL;
+ }
+
+ *eptr = _eptr;
+ *sptr = _sptr;
+}
+
+/* Move to the previous entry based on the values in eptr and sptr. Both are
+ * set to NULL when there is no next entry. */
+void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr) {
+ unsigned char *_eptr, *_sptr;
+ redisAssert(*eptr != NULL && *sptr != NULL);
+
+ _sptr = ziplistPrev(zl,*eptr);
+ if (_sptr != NULL) {
+ _eptr = ziplistPrev(zl,_sptr);
+ redisAssert(_eptr != NULL);
+ } else {
+ /* No previous entry. */
+ _eptr = NULL;
+ }
+
+ *eptr = _eptr;
+ *sptr = _sptr;
+}
+
/* Returns if there is a part of the zset is in range. Should only be used
* internally by zzlFirstInRange and zzlLastInRange. */
int zzlIsInRange(unsigned char *zl, zrangespec *range) {
return 0;
p = ziplistIndex(zl,-1); /* Last score. */
- redisAssert(p != NULL);
+ if (p == NULL) return 0; /* Empty sorted set */
score = zzlGetScore(p);
if (!zslValueGteMin(score,range))
return 0;
/* Find pointer to the first element contained in the specified range.
* Returns NULL when no element is contained in the range. */
-unsigned char *zzlFirstInRange(robj *zobj, zrangespec range) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlFirstInRange(unsigned char *zl, zrangespec range) {
unsigned char *eptr = ziplistIndex(zl,0), *sptr;
double score;
redisAssert(sptr != NULL);
score = zzlGetScore(sptr);
- if (zslValueGteMin(score,&range))
- return eptr;
+ if (zslValueGteMin(score,&range)) {
+ /* Check if score <= max. */
+ if (zslValueLteMax(score,&range))
+ return eptr;
+ return NULL;
+ }
/* Move to next element. */
eptr = ziplistNext(zl,sptr);
/* Find pointer to the last element contained in the specified range.
* Returns NULL when no element is contained in the range. */
-unsigned char *zzlLastInRange(robj *zobj, zrangespec range) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlLastInRange(unsigned char *zl, zrangespec range) {
unsigned char *eptr = ziplistIndex(zl,-2), *sptr;
double score;
redisAssert(sptr != NULL);
score = zzlGetScore(sptr);
- if (zslValueLteMax(score,&range))
- return eptr;
+ if (zslValueLteMax(score,&range)) {
+ /* Check if score >= min. */
+ if (zslValueGteMin(score,&range))
+ return eptr;
+ return NULL;
+ }
/* Move to previous element by moving to the score of previous element.
* When this returns NULL, we know there also is no element. */
return NULL;
}
-unsigned char *zzlFind(robj *zobj, robj *ele, double *score) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlFind(unsigned char *zl, robj *ele, double *score) {
unsigned char *eptr = ziplistIndex(zl,0), *sptr;
ele = getDecodedObject(ele);
while (eptr != NULL) {
sptr = ziplistNext(zl,eptr);
- redisAssert(sptr != NULL);
+ redisAssertWithInfo(NULL,ele,sptr != NULL);
if (ziplistCompare(eptr,ele->ptr,sdslen(ele->ptr))) {
/* Matching element, pull out score. */
/* Delete (element,score) pair from ziplist. Use local copy of eptr because we
* don't want to modify the one given as argument. */
-int zzlDelete(robj *zobj, unsigned char *eptr) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlDelete(unsigned char *zl, unsigned char *eptr) {
unsigned char *p = eptr;
/* TODO: add function to ziplist API to delete N elements from offset. */
zl = ziplistDelete(zl,&p);
zl = ziplistDelete(zl,&p);
- zobj->ptr = zl;
- return REDIS_OK;
+ return zl;
}
-int zzlInsertAt(robj *zobj, robj *ele, double score, unsigned char *eptr) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlInsertAt(unsigned char *zl, unsigned char *eptr, robj *ele, double score) {
unsigned char *sptr;
char scorebuf[128];
int scorelen;
- int offset;
+ size_t offset;
- redisAssert(ele->encoding == REDIS_ENCODING_RAW);
+ redisAssertWithInfo(NULL,ele,ele->encoding == REDIS_ENCODING_RAW);
scorelen = d2string(scorebuf,sizeof(scorebuf),score);
if (eptr == NULL) {
zl = ziplistPush(zl,ele->ptr,sdslen(ele->ptr),ZIPLIST_TAIL);
eptr = zl+offset;
/* Insert score after the element. */
- redisAssert((sptr = ziplistNext(zl,eptr)) != NULL);
+ redisAssertWithInfo(NULL,ele,(sptr = ziplistNext(zl,eptr)) != NULL);
zl = ziplistInsert(zl,sptr,(unsigned char*)scorebuf,scorelen);
}
- zobj->ptr = zl;
- return REDIS_OK;
+ return zl;
}
/* Insert (element,score) pair in ziplist. This function assumes the element is
* not yet present in the list. */
-int zzlInsert(robj *zobj, robj *ele, double score) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score) {
unsigned char *eptr = ziplistIndex(zl,0), *sptr;
double s;
ele = getDecodedObject(ele);
while (eptr != NULL) {
sptr = ziplistNext(zl,eptr);
- redisAssert(sptr != NULL);
+ redisAssertWithInfo(NULL,ele,sptr != NULL);
s = zzlGetScore(sptr);
if (s > score) {
/* First element with score larger than score for element to be
* inserted. This means we should take its spot in the list to
* maintain ordering. */
- zzlInsertAt(zobj,ele,score,eptr);
+ zl = zzlInsertAt(zl,eptr,ele,score);
break;
} else if (s == score) {
/* Ensure lexicographical ordering for elements. */
- if (zzlCompareElements(eptr,ele->ptr,sdslen(ele->ptr)) < 0) {
- zzlInsertAt(zobj,ele,score,eptr);
+ if (zzlCompareElements(eptr,ele->ptr,sdslen(ele->ptr)) > 0) {
+ zl = zzlInsertAt(zl,eptr,ele,score);
break;
}
}
/* Push on tail of list when it was not yet inserted. */
if (eptr == NULL)
- zzlInsertAt(zobj,ele,score,NULL);
+ zl = zzlInsertAt(zl,NULL,ele,score);
decrRefCount(ele);
- return REDIS_OK;
+ return zl;
}
-unsigned long zzlDeleteRangeByScore(robj *zobj, zrangespec range) {
- unsigned char *zl = zobj->ptr;
+unsigned char *zzlDeleteRangeByScore(unsigned char *zl, zrangespec range, unsigned long *deleted) {
unsigned char *eptr, *sptr;
double score;
- unsigned long deleted = 0;
+ unsigned long num = 0;
- eptr = zzlFirstInRange(zobj,range);
- if (eptr == NULL) return deleted;
+ if (deleted != NULL) *deleted = 0;
+ eptr = zzlFirstInRange(zl,range);
+ if (eptr == NULL) return zl;
/* When the tail of the ziplist is deleted, eptr will point to the sentinel
* byte and ziplistNext will return NULL. */
/* Delete both the element and the score. */
zl = ziplistDelete(zl,&eptr);
zl = ziplistDelete(zl,&eptr);
- deleted++;
+ num++;
} else {
/* No longer in range. */
break;
}
}
- return deleted;
+ if (deleted != NULL) *deleted = num;
+ return zl;
+}
+
+/* Delete all the elements with rank between start and end from the skiplist.
+ * Start and end are inclusive. Note that start and end need to be 1-based */
+unsigned char *zzlDeleteRangeByRank(unsigned char *zl, unsigned int start, unsigned int end, unsigned long *deleted) {
+ unsigned int num = (end-start)+1;
+ if (deleted) *deleted = num;
+ zl = ziplistDeleteRange(zl,2*(start-1),2*num);
+ return zl;
+}
+
+/*-----------------------------------------------------------------------------
+ * Common sorted set API
+ *----------------------------------------------------------------------------*/
+
+unsigned int zsetLength(robj *zobj) {
+ int length = -1;
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ length = zzlLength(zobj->ptr);
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ length = ((zset*)zobj->ptr)->zsl->length;
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+ return length;
+}
+
+void zsetConvert(robj *zobj, int encoding) {
+ zset *zs;
+ zskiplistNode *node, *next;
+ robj *ele;
+ double score;
+
+ if (zobj->encoding == encoding) return;
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl = zobj->ptr;
+ unsigned char *eptr, *sptr;
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+
+ if (encoding != REDIS_ENCODING_SKIPLIST)
+ redisPanic("Unknown target encoding");
+
+ zs = zmalloc(sizeof(*zs));
+ zs->dict = dictCreate(&zsetDictType,NULL);
+ zs->zsl = zslCreate();
+
+ eptr = ziplistIndex(zl,0);
+ redisAssertWithInfo(NULL,zobj,eptr != NULL);
+ sptr = ziplistNext(zl,eptr);
+ redisAssertWithInfo(NULL,zobj,sptr != NULL);
+
+ while (eptr != NULL) {
+ score = zzlGetScore(sptr);
+ redisAssertWithInfo(NULL,zobj,ziplistGet(eptr,&vstr,&vlen,&vlong));
+ if (vstr == NULL)
+ ele = createStringObjectFromLongLong(vlong);
+ else
+ ele = createStringObject((char*)vstr,vlen);
+
+ /* Has incremented refcount since it was just created. */
+ node = zslInsert(zs->zsl,score,ele);
+ redisAssertWithInfo(NULL,zobj,dictAdd(zs->dict,ele,&node->score) == DICT_OK);
+ incrRefCount(ele); /* Added to dictionary. */
+ zzlNext(zl,&eptr,&sptr);
+ }
+
+ zfree(zobj->ptr);
+ zobj->ptr = zs;
+ zobj->encoding = REDIS_ENCODING_SKIPLIST;
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ unsigned char *zl = ziplistNew();
+
+ if (encoding != REDIS_ENCODING_ZIPLIST)
+ redisPanic("Unknown target encoding");
+
+ /* Approach similar to zslFree(), since we want to free the skiplist at
+ * the same time as creating the ziplist. */
+ zs = zobj->ptr;
+ dictRelease(zs->dict);
+ node = zs->zsl->header->level[0].forward;
+ zfree(zs->zsl->header);
+ zfree(zs->zsl);
+
+ while (node) {
+ ele = getDecodedObject(node->obj);
+ zl = zzlInsertAt(zl,NULL,ele,node->score);
+ decrRefCount(ele);
+
+ next = node->level[0].forward;
+ zslFreeNode(node);
+ node = next;
+ }
+
+ zfree(zs);
+ zobj->ptr = zl;
+ zobj->encoding = REDIS_ENCODING_ZIPLIST;
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
}
/*-----------------------------------------------------------------------------
robj *ele;
robj *zobj;
robj *curobj;
- double score, curscore = 0.0;
+ double score = 0, *scores, curscore = 0.0;
+ int j, elements = (c->argc-2)/2;
+ int added = 0;
- if (getDoubleFromObjectOrReply(c,c->argv[2],&score,NULL) != REDIS_OK)
+ if (c->argc % 2) {
+ addReply(c,shared.syntaxerr);
return;
+ }
+
+ /* Start parsing all the scores, we need to emit any syntax error
+ * before executing additions to the sorted set, as the command should
+ * either execute fully or nothing at all. */
+ scores = zmalloc(sizeof(double)*elements);
+ for (j = 0; j < elements; j++) {
+ if (getDoubleFromObjectOrReply(c,c->argv[2+j*2],&scores[j],NULL)
+ != REDIS_OK)
+ {
+ zfree(scores);
+ return;
+ }
+ }
+ /* Lookup the key and create the sorted set if does not exist. */
zobj = lookupKeyWrite(c->db,key);
if (zobj == NULL) {
- zobj = createZsetZiplistObject();
+ if (server.zset_max_ziplist_entries == 0 ||
+ server.zset_max_ziplist_value < sdslen(c->argv[3]->ptr))
+ {
+ zobj = createZsetObject();
+ } else {
+ zobj = createZsetZiplistObject();
+ }
dbAdd(c->db,key,zobj);
} else {
if (zobj->type != REDIS_ZSET) {
addReply(c,shared.wrongtypeerr);
+ zfree(scores);
return;
}
}
- if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
- unsigned char *eptr;
-
- /* Prefer non-encoded element when dealing with ziplists. */
- ele = c->argv[3];
- if ((eptr = zzlFind(zobj,ele,&curscore)) != NULL) {
- if (incr) {
- score += curscore;
- if (isnan(score)) {
- addReplyError(c,nanerr);
- /* Don't need to check if the sorted set is empty, because
- * we know it has at least one element. */
- return;
+ for (j = 0; j < elements; j++) {
+ score = scores[j];
+
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *eptr;
+
+ /* Prefer non-encoded element when dealing with ziplists. */
+ ele = c->argv[3+j*2];
+ if ((eptr = zzlFind(zobj->ptr,ele,&curscore)) != NULL) {
+ if (incr) {
+ score += curscore;
+ if (isnan(score)) {
+ addReplyError(c,nanerr);
+ /* Don't need to check if the sorted set is empty
+ * because we know it has at least one element. */
+ zfree(scores);
+ return;
+ }
}
- }
- /* Remove and re-insert when score changed. */
- if (score != curscore) {
- redisAssert(zzlDelete(zobj,eptr) == REDIS_OK);
- redisAssert(zzlInsert(zobj,ele,score) == REDIS_OK);
+ /* Remove and re-insert when score changed. */
+ if (score != curscore) {
+ zobj->ptr = zzlDelete(zobj->ptr,eptr);
+ zobj->ptr = zzlInsert(zobj->ptr,ele,score);
+
+ signalModifiedKey(c->db,key);
+ server.dirty++;
+ }
+ } else {
+ /* Optimize: check if the element is too large or the list
+ * becomes too long *before* executing zzlInsert. */
+ zobj->ptr = zzlInsert(zobj->ptr,ele,score);
+ if (zzlLength(zobj->ptr) > server.zset_max_ziplist_entries)
+ zsetConvert(zobj,REDIS_ENCODING_SKIPLIST);
+ if (sdslen(ele->ptr) > server.zset_max_ziplist_value)
+ zsetConvert(zobj,REDIS_ENCODING_SKIPLIST);
signalModifiedKey(c->db,key);
server.dirty++;
+ if (!incr) added++;
}
-
- if (incr) /* ZINCRBY */
- addReplyDouble(c,score);
- else /* ZADD */
- addReply(c,shared.czero);
- } else {
- redisAssert(zzlInsert(zobj,ele,score) == REDIS_OK);
-
- signalModifiedKey(c->db,key);
- server.dirty++;
-
- if (incr) /* ZINCRBY */
- addReplyDouble(c,score);
- else /* ZADD */
- addReply(c,shared.cone);
- }
- } else if (zobj->encoding == REDIS_ENCODING_RAW) {
- zset *zs = zobj->ptr;
- zskiplistNode *znode;
- dictEntry *de;
-
- ele = c->argv[3] = tryObjectEncoding(c->argv[3]);
- de = dictFind(zs->dict,ele);
- if (de != NULL) {
- curobj = dictGetEntryKey(de);
- curscore = *(double*)dictGetEntryVal(de);
-
- if (incr) {
- score += curscore;
- if (isnan(score)) {
- addReplyError(c,nanerr);
- /* Don't need to check if the sorted set is empty, because
- * we know it has at least one element. */
- return;
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+ zskiplistNode *znode;
+ dictEntry *de;
+
+ ele = c->argv[3+j*2] = tryObjectEncoding(c->argv[3+j*2]);
+ de = dictFind(zs->dict,ele);
+ if (de != NULL) {
+ curobj = dictGetKey(de);
+ curscore = *(double*)dictGetVal(de);
+
+ if (incr) {
+ score += curscore;
+ if (isnan(score)) {
+ addReplyError(c,nanerr);
+ /* Don't need to check if the sorted set is empty
+ * because we know it has at least one element. */
+ zfree(scores);
+ return;
+ }
}
- }
- /* Remove and re-insert when score changed. We can safely delete
- * the key object from the skiplist, since the dictionary still has
- * a reference to it. */
- if (score != curscore) {
- redisAssert(zslDelete(zs->zsl,curscore,curobj));
- znode = zslInsert(zs->zsl,score,curobj);
- incrRefCount(curobj); /* Re-inserted in skiplist. */
- dictGetEntryVal(de) = &znode->score; /* Update score ptr. */
+ /* Remove and re-insert when score changed. We can safely
+ * delete the key object from the skiplist, since the
+ * dictionary still has a reference to it. */
+ if (score != curscore) {
+ redisAssertWithInfo(c,curobj,zslDelete(zs->zsl,curscore,curobj));
+ znode = zslInsert(zs->zsl,score,curobj);
+ incrRefCount(curobj); /* Re-inserted in skiplist. */
+ dictGetVal(de) = &znode->score; /* Update score ptr. */
+
+ signalModifiedKey(c->db,key);
+ server.dirty++;
+ }
+ } else {
+ znode = zslInsert(zs->zsl,score,ele);
+ incrRefCount(ele); /* Inserted in skiplist. */
+ redisAssertWithInfo(c,NULL,dictAdd(zs->dict,ele,&znode->score) == DICT_OK);
+ incrRefCount(ele); /* Added to dictionary. */
signalModifiedKey(c->db,key);
server.dirty++;
+ if (!incr) added++;
}
-
- if (incr) /* ZINCRBY */
- addReplyDouble(c,score);
- else /* ZADD */
- addReply(c,shared.czero);
} else {
- znode = zslInsert(zs->zsl,score,ele);
- incrRefCount(ele); /* Inserted in skiplist. */
- redisAssert(dictAdd(zs->dict,ele,&znode->score) == DICT_OK);
- incrRefCount(ele); /* Added to dictionary. */
-
- signalModifiedKey(c->db,key);
- server.dirty++;
-
- if (incr) /* ZINCRBY */
- addReplyDouble(c,score);
- else /* ZADD */
- addReply(c,shared.cone);
+ redisPanic("Unknown sorted set encoding");
}
- } else {
- redisPanic("Unknown sorted set encoding");
}
+ zfree(scores);
+ if (incr) /* ZINCRBY */
+ addReplyDouble(c,score);
+ else /* ZADD */
+ addReplyLongLong(c,added);
}
void zaddCommand(redisClient *c) {
void zremCommand(redisClient *c) {
robj *key = c->argv[1];
- robj *ele = c->argv[2];
robj *zobj;
+ int deleted = 0, j;
if ((zobj = lookupKeyWriteOrReply(c,key,shared.czero)) == NULL ||
checkType(c,zobj,REDIS_ZSET)) return;
if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *eptr;
- if ((eptr = zzlFind(zobj,ele,NULL)) != NULL) {
- redisAssert(zzlDelete(zobj,eptr) == REDIS_OK);
- if (zzlLength(zobj) == 0) dbDelete(c->db,key);
- } else {
- addReply(c,shared.czero);
- return;
+ for (j = 2; j < c->argc; j++) {
+ if ((eptr = zzlFind(zobj->ptr,c->argv[j],NULL)) != NULL) {
+ deleted++;
+ zobj->ptr = zzlDelete(zobj->ptr,eptr);
+ if (zzlLength(zobj->ptr) == 0) {
+ dbDelete(c->db,key);
+ break;
+ }
+ }
}
- } else if (zobj->encoding == REDIS_ENCODING_RAW) {
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
zset *zs = zobj->ptr;
dictEntry *de;
double score;
- de = dictFind(zs->dict,ele);
- if (de != NULL) {
- /* Delete from the skiplist */
- score = *(double*)dictGetEntryVal(de);
- redisAssert(zslDelete(zs->zsl,score,ele));
-
- /* Delete from the hash table */
- dictDelete(zs->dict,ele);
- if (htNeedsResize(zs->dict)) dictResize(zs->dict);
- if (dictSize(zs->dict) == 0) dbDelete(c->db,key);
- } else {
- addReply(c,shared.czero);
- return;
+ for (j = 2; j < c->argc; j++) {
+ de = dictFind(zs->dict,c->argv[j]);
+ if (de != NULL) {
+ deleted++;
+
+ /* Delete from the skiplist */
+ score = *(double*)dictGetVal(de);
+ redisAssertWithInfo(c,c->argv[j],zslDelete(zs->zsl,score,c->argv[j]));
+
+ /* Delete from the hash table */
+ dictDelete(zs->dict,c->argv[j]);
+ if (htNeedsResize(zs->dict)) dictResize(zs->dict);
+ if (dictSize(zs->dict) == 0) {
+ dbDelete(c->db,key);
+ break;
+ }
+ }
}
} else {
redisPanic("Unknown sorted set encoding");
}
- signalModifiedKey(c->db,key);
- server.dirty++;
- addReply(c,shared.cone);
+ if (deleted) {
+ signalModifiedKey(c->db,key);
+ server.dirty += deleted;
+ }
+ addReplyLongLong(c,deleted);
}
void zremrangebyscoreCommand(redisClient *c) {
/* Parse the range arguments. */
if (zslParseRange(c->argv[2],c->argv[3],&range) != REDIS_OK) {
- addReplyError(c,"min or max is not a double");
+ addReplyError(c,"min or max is not a float");
return;
}
checkType(c,zobj,REDIS_ZSET)) return;
if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
- deleted = zzlDeleteRangeByScore(zobj,range);
- } else if (zobj->encoding == REDIS_ENCODING_RAW) {
+ zobj->ptr = zzlDeleteRangeByScore(zobj->ptr,range,&deleted);
+ if (zzlLength(zobj->ptr) == 0) dbDelete(c->db,key);
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
zset *zs = zobj->ptr;
deleted = zslDeleteRangeByScore(zs->zsl,range,zs->dict);
if (htNeedsResize(zs->dict)) dictResize(zs->dict);
}
void zremrangebyrankCommand(redisClient *c) {
+ robj *key = c->argv[1];
+ robj *zobj;
long start;
long end;
int llen;
- long deleted;
- robj *zsetobj;
- zset *zs;
+ unsigned long deleted;
if ((getLongFromObjectOrReply(c, c->argv[2], &start, NULL) != REDIS_OK) ||
(getLongFromObjectOrReply(c, c->argv[3], &end, NULL) != REDIS_OK)) return;
- if ((zsetobj = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
- checkType(c,zsetobj,REDIS_ZSET)) return;
- zs = zsetobj->ptr;
- llen = zs->zsl->length;
+ if ((zobj = lookupKeyWriteOrReply(c,key,shared.czero)) == NULL ||
+ checkType(c,zobj,REDIS_ZSET)) return;
- /* convert negative indexes */
+ /* Sanitize indexes. */
+ llen = zsetLength(zobj);
if (start < 0) start = llen+start;
if (end < 0) end = llen+end;
if (start < 0) start = 0;
}
if (end >= llen) end = llen-1;
- /* increment start and end because zsl*Rank functions
- * use 1-based rank */
- deleted = zslDeleteRangeByRank(zs->zsl,start+1,end+1,zs->dict);
- if (htNeedsResize(zs->dict)) dictResize(zs->dict);
- if (dictSize(zs->dict) == 0) dbDelete(c->db,c->argv[1]);
- if (deleted) signalModifiedKey(c->db,c->argv[1]);
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ /* Correct for 1-based rank. */
+ zobj->ptr = zzlDeleteRangeByRank(zobj->ptr,start+1,end+1,&deleted);
+ if (zzlLength(zobj->ptr) == 0) dbDelete(c->db,key);
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+
+ /* Correct for 1-based rank. */
+ deleted = zslDeleteRangeByRank(zs->zsl,start+1,end+1,zs->dict);
+ if (htNeedsResize(zs->dict)) dictResize(zs->dict);
+ if (dictSize(zs->dict) == 0) dbDelete(c->db,key);
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+
+ if (deleted) signalModifiedKey(c->db,key);
server.dirty += deleted;
- addReplyLongLong(c, deleted);
+ addReplyLongLong(c,deleted);
}
typedef struct {
- dict *dict;
+ robj *subject;
+ int type; /* Set, sorted set */
+ int encoding;
double weight;
+
+ union {
+ /* Set iterators. */
+ union _iterset {
+ struct {
+ intset *is;
+ int ii;
+ } is;
+ struct {
+ dict *dict;
+ dictIterator *di;
+ dictEntry *de;
+ } ht;
+ } set;
+
+ /* Sorted set iterators. */
+ union _iterzset {
+ struct {
+ unsigned char *zl;
+ unsigned char *eptr, *sptr;
+ } zl;
+ struct {
+ zset *zs;
+ zskiplistNode *node;
+ } sl;
+ } zset;
+ } iter;
} zsetopsrc;
-int qsortCompareZsetopsrcByCardinality(const void *s1, const void *s2) {
- zsetopsrc *d1 = (void*) s1, *d2 = (void*) s2;
- unsigned long size1, size2;
- size1 = d1->dict ? dictSize(d1->dict) : 0;
- size2 = d2->dict ? dictSize(d2->dict) : 0;
- return size1 - size2;
+
+/* Use dirty flags for pointers that need to be cleaned up in the next
+ * iteration over the zsetopval. The dirty flag for the long long value is
+ * special, since long long values don't need cleanup. Instead, it means that
+ * we already checked that "ell" holds a long long, or tried to convert another
+ * representation into a long long value. When this was successful,
+ * OPVAL_VALID_LL is set as well. */
+#define OPVAL_DIRTY_ROBJ 1
+#define OPVAL_DIRTY_LL 2
+#define OPVAL_VALID_LL 4
+
+/* Store value retrieved from the iterator. */
+typedef struct {
+ int flags;
+ unsigned char _buf[32]; /* Private buffer. */
+ robj *ele;
+ unsigned char *estr;
+ unsigned int elen;
+ long long ell;
+ double score;
+} zsetopval;
+
+typedef union _iterset iterset;
+typedef union _iterzset iterzset;
+
+void zuiInitIterator(zsetopsrc *op) {
+ if (op->subject == NULL)
+ return;
+
+ if (op->type == REDIS_SET) {
+ iterset *it = &op->iter.set;
+ if (op->encoding == REDIS_ENCODING_INTSET) {
+ it->is.is = op->subject->ptr;
+ it->is.ii = 0;
+ } else if (op->encoding == REDIS_ENCODING_HT) {
+ it->ht.dict = op->subject->ptr;
+ it->ht.di = dictGetIterator(op->subject->ptr);
+ it->ht.de = dictNext(it->ht.di);
+ } else {
+ redisPanic("Unknown set encoding");
+ }
+ } else if (op->type == REDIS_ZSET) {
+ iterzset *it = &op->iter.zset;
+ if (op->encoding == REDIS_ENCODING_ZIPLIST) {
+ it->zl.zl = op->subject->ptr;
+ it->zl.eptr = ziplistIndex(it->zl.zl,0);
+ if (it->zl.eptr != NULL) {
+ it->zl.sptr = ziplistNext(it->zl.zl,it->zl.eptr);
+ redisAssert(it->zl.sptr != NULL);
+ }
+ } else if (op->encoding == REDIS_ENCODING_SKIPLIST) {
+ it->sl.zs = op->subject->ptr;
+ it->sl.node = it->sl.zs->zsl->header->level[0].forward;
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+ } else {
+ redisPanic("Unsupported type");
+ }
+}
+
+void zuiClearIterator(zsetopsrc *op) {
+ if (op->subject == NULL)
+ return;
+
+ if (op->type == REDIS_SET) {
+ iterset *it = &op->iter.set;
+ if (op->encoding == REDIS_ENCODING_INTSET) {
+ REDIS_NOTUSED(it); /* skip */
+ } else if (op->encoding == REDIS_ENCODING_HT) {
+ dictReleaseIterator(it->ht.di);
+ } else {
+ redisPanic("Unknown set encoding");
+ }
+ } else if (op->type == REDIS_ZSET) {
+ iterzset *it = &op->iter.zset;
+ if (op->encoding == REDIS_ENCODING_ZIPLIST) {
+ REDIS_NOTUSED(it); /* skip */
+ } else if (op->encoding == REDIS_ENCODING_SKIPLIST) {
+ REDIS_NOTUSED(it); /* skip */
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+ } else {
+ redisPanic("Unsupported type");
+ }
+}
+
+int zuiLength(zsetopsrc *op) {
+ if (op->subject == NULL)
+ return 0;
+
+ if (op->type == REDIS_SET) {
+ iterset *it = &op->iter.set;
+ if (op->encoding == REDIS_ENCODING_INTSET) {
+ return intsetLen(it->is.is);
+ } else if (op->encoding == REDIS_ENCODING_HT) {
+ return dictSize(it->ht.dict);
+ } else {
+ redisPanic("Unknown set encoding");
+ }
+ } else if (op->type == REDIS_ZSET) {
+ iterzset *it = &op->iter.zset;
+ if (op->encoding == REDIS_ENCODING_ZIPLIST) {
+ return zzlLength(it->zl.zl);
+ } else if (op->encoding == REDIS_ENCODING_SKIPLIST) {
+ return it->sl.zs->zsl->length;
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+ } else {
+ redisPanic("Unsupported type");
+ }
+}
+
+/* Check if the current value is valid. If so, store it in the passed structure
+ * and move to the next element. If not valid, this means we have reached the
+ * end of the structure and can abort. */
+int zuiNext(zsetopsrc *op, zsetopval *val) {
+ if (op->subject == NULL)
+ return 0;
+
+ if (val->flags & OPVAL_DIRTY_ROBJ)
+ decrRefCount(val->ele);
+
+ memset(val,0,sizeof(zsetopval));
+
+ if (op->type == REDIS_SET) {
+ iterset *it = &op->iter.set;
+ if (op->encoding == REDIS_ENCODING_INTSET) {
+ int64_t ell;
+
+ if (!intsetGet(it->is.is,it->is.ii,&ell))
+ return 0;
+ val->ell = ell;
+ val->score = 1.0;
+
+ /* Move to next element. */
+ it->is.ii++;
+ } else if (op->encoding == REDIS_ENCODING_HT) {
+ if (it->ht.de == NULL)
+ return 0;
+ val->ele = dictGetKey(it->ht.de);
+ val->score = 1.0;
+
+ /* Move to next element. */
+ it->ht.de = dictNext(it->ht.di);
+ } else {
+ redisPanic("Unknown set encoding");
+ }
+ } else if (op->type == REDIS_ZSET) {
+ iterzset *it = &op->iter.zset;
+ if (op->encoding == REDIS_ENCODING_ZIPLIST) {
+ /* No need to check both, but better be explicit. */
+ if (it->zl.eptr == NULL || it->zl.sptr == NULL)
+ return 0;
+ redisAssert(ziplistGet(it->zl.eptr,&val->estr,&val->elen,&val->ell));
+ val->score = zzlGetScore(it->zl.sptr);
+
+ /* Move to next element. */
+ zzlNext(it->zl.zl,&it->zl.eptr,&it->zl.sptr);
+ } else if (op->encoding == REDIS_ENCODING_SKIPLIST) {
+ if (it->sl.node == NULL)
+ return 0;
+ val->ele = it->sl.node->obj;
+ val->score = it->sl.node->score;
+
+ /* Move to next element. */
+ it->sl.node = it->sl.node->level[0].forward;
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+ } else {
+ redisPanic("Unsupported type");
+ }
+ return 1;
+}
+
+int zuiLongLongFromValue(zsetopval *val) {
+ if (!(val->flags & OPVAL_DIRTY_LL)) {
+ val->flags |= OPVAL_DIRTY_LL;
+
+ if (val->ele != NULL) {
+ if (val->ele->encoding == REDIS_ENCODING_INT) {
+ val->ell = (long)val->ele->ptr;
+ val->flags |= OPVAL_VALID_LL;
+ } else if (val->ele->encoding == REDIS_ENCODING_RAW) {
+ if (string2ll(val->ele->ptr,sdslen(val->ele->ptr),&val->ell))
+ val->flags |= OPVAL_VALID_LL;
+ } else {
+ redisPanic("Unsupported element encoding");
+ }
+ } else if (val->estr != NULL) {
+ if (string2ll((char*)val->estr,val->elen,&val->ell))
+ val->flags |= OPVAL_VALID_LL;
+ } else {
+ /* The long long was already set, flag as valid. */
+ val->flags |= OPVAL_VALID_LL;
+ }
+ }
+ return val->flags & OPVAL_VALID_LL;
+}
+
+robj *zuiObjectFromValue(zsetopval *val) {
+ if (val->ele == NULL) {
+ if (val->estr != NULL) {
+ val->ele = createStringObject((char*)val->estr,val->elen);
+ } else {
+ val->ele = createStringObjectFromLongLong(val->ell);
+ }
+ val->flags |= OPVAL_DIRTY_ROBJ;
+ }
+ return val->ele;
+}
+
+int zuiBufferFromValue(zsetopval *val) {
+ if (val->estr == NULL) {
+ if (val->ele != NULL) {
+ if (val->ele->encoding == REDIS_ENCODING_INT) {
+ val->elen = ll2string((char*)val->_buf,sizeof(val->_buf),(long)val->ele->ptr);
+ val->estr = val->_buf;
+ } else if (val->ele->encoding == REDIS_ENCODING_RAW) {
+ val->elen = sdslen(val->ele->ptr);
+ val->estr = val->ele->ptr;
+ } else {
+ redisPanic("Unsupported element encoding");
+ }
+ } else {
+ val->elen = ll2string((char*)val->_buf,sizeof(val->_buf),val->ell);
+ val->estr = val->_buf;
+ }
+ }
+ return 1;
+}
+
+/* Find value pointed to by val in the source pointer to by op. When found,
+ * return 1 and store its score in target. Return 0 otherwise. */
+int zuiFind(zsetopsrc *op, zsetopval *val, double *score) {
+ if (op->subject == NULL)
+ return 0;
+
+ if (op->type == REDIS_SET) {
+ iterset *it = &op->iter.set;
+
+ if (op->encoding == REDIS_ENCODING_INTSET) {
+ if (zuiLongLongFromValue(val) && intsetFind(it->is.is,val->ell)) {
+ *score = 1.0;
+ return 1;
+ } else {
+ return 0;
+ }
+ } else if (op->encoding == REDIS_ENCODING_HT) {
+ zuiObjectFromValue(val);
+ if (dictFind(it->ht.dict,val->ele) != NULL) {
+ *score = 1.0;
+ return 1;
+ } else {
+ return 0;
+ }
+ } else {
+ redisPanic("Unknown set encoding");
+ }
+ } else if (op->type == REDIS_ZSET) {
+ iterzset *it = &op->iter.zset;
+ zuiObjectFromValue(val);
+
+ if (op->encoding == REDIS_ENCODING_ZIPLIST) {
+ if (zzlFind(it->zl.zl,val->ele,score) != NULL) {
+ /* Score is already set by zzlFind. */
+ return 1;
+ } else {
+ return 0;
+ }
+ } else if (op->encoding == REDIS_ENCODING_SKIPLIST) {
+ dictEntry *de;
+ if ((de = dictFind(it->sl.zs->dict,val->ele)) != NULL) {
+ *score = *(double*)dictGetVal(de);
+ return 1;
+ } else {
+ return 0;
+ }
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+ } else {
+ redisPanic("Unsupported type");
+ }
+}
+
+int zuiCompareByCardinality(const void *s1, const void *s2) {
+ return zuiLength((zsetopsrc*)s1) - zuiLength((zsetopsrc*)s2);
}
#define REDIS_AGGR_SUM 1
#define REDIS_AGGR_MIN 2
#define REDIS_AGGR_MAX 3
-#define zunionInterDictValue(_e) (dictGetEntryVal(_e) == NULL ? 1.0 : *(double*)dictGetEntryVal(_e))
+#define zunionInterDictValue(_e) (dictGetVal(_e) == NULL ? 1.0 : *(double*)dictGetVal(_e))
inline static void zunionInterAggregate(double *target, double val, int aggregate) {
if (aggregate == REDIS_AGGR_SUM) {
}
void zunionInterGenericCommand(redisClient *c, robj *dstkey, int op) {
- int i, j, setnum;
+ int i, j;
+ long setnum;
int aggregate = REDIS_AGGR_SUM;
zsetopsrc *src;
+ zsetopval zval;
+ robj *tmp;
+ unsigned int maxelelen = 0;
robj *dstobj;
zset *dstzset;
zskiplistNode *znode;
- dictIterator *di;
- dictEntry *de;
int touched = 0;
/* expect setnum input keys to be given */
- setnum = atoi(c->argv[2]->ptr);
+ if ((getLongFromObjectOrReply(c, c->argv[2], &setnum, NULL) != REDIS_OK))
+ return;
+
if (setnum < 1) {
addReplyError(c,
"at least 1 input key is needed for ZUNIONSTORE/ZINTERSTORE");
}
/* read keys to be used for input */
- src = zmalloc(sizeof(zsetopsrc) * setnum);
+ src = zcalloc(sizeof(zsetopsrc) * setnum);
for (i = 0, j = 3; i < setnum; i++, j++) {
robj *obj = lookupKeyWrite(c->db,c->argv[j]);
- if (!obj) {
- src[i].dict = NULL;
- } else {
- if (obj->type == REDIS_ZSET) {
- src[i].dict = ((zset*)obj->ptr)->dict;
- } else if (obj->type == REDIS_SET) {
- src[i].dict = (obj->ptr);
- } else {
+ if (obj != NULL) {
+ if (obj->type != REDIS_ZSET && obj->type != REDIS_SET) {
zfree(src);
addReply(c,shared.wrongtypeerr);
return;
}
+
+ src[i].subject = obj;
+ src[i].type = obj->type;
+ src[i].encoding = obj->encoding;
+ } else {
+ src[i].subject = NULL;
}
- /* default all weights to 1 */
+ /* Default all weights to 1. */
src[i].weight = 1.0;
}
j++; remaining--;
for (i = 0; i < setnum; i++, j++, remaining--) {
if (getDoubleFromObjectOrReply(c,c->argv[j],&src[i].weight,
- "weight value is not a double") != REDIS_OK)
+ "weight value is not a float") != REDIS_OK)
{
zfree(src);
return;
}
}
+ for (i = 0; i < setnum; i++)
+ zuiInitIterator(&src[i]);
+
/* sort sets from the smallest to largest, this will improve our
* algorithm's performance */
- qsort(src,setnum,sizeof(zsetopsrc),qsortCompareZsetopsrcByCardinality);
+ qsort(src,setnum,sizeof(zsetopsrc),zuiCompareByCardinality);
dstobj = createZsetObject();
dstzset = dstobj->ptr;
+ memset(&zval, 0, sizeof(zval));
if (op == REDIS_OP_INTER) {
- /* skip going over all entries if the smallest zset is NULL or empty */
- if (src[0].dict && dictSize(src[0].dict) > 0) {
- /* precondition: as src[0].dict is non-empty and the zsets are ordered
- * from small to large, all src[i > 0].dict are non-empty too */
- di = dictGetIterator(src[0].dict);
- while((de = dictNext(di)) != NULL) {
+ /* Skip everything if the smallest input is empty. */
+ if (zuiLength(&src[0]) > 0) {
+ /* Precondition: as src[0] is non-empty and the inputs are ordered
+ * by size, all src[i > 0] are non-empty too. */
+ while (zuiNext(&src[0],&zval)) {
double score, value;
- score = src[0].weight * zunionInterDictValue(de);
+ score = src[0].weight * zval.score;
+ if (isnan(score)) score = 0;
+
for (j = 1; j < setnum; j++) {
- dictEntry *other = dictFind(src[j].dict,dictGetEntryKey(de));
- if (other) {
- value = src[j].weight * zunionInterDictValue(other);
+ /* It is not safe to access the zset we are
+ * iterating, so explicitly check for equal object. */
+ if (src[j].subject == src[0].subject) {
+ value = zval.score*src[j].weight;
+ zunionInterAggregate(&score,value,aggregate);
+ } else if (zuiFind(&src[j],&zval,&value)) {
+ value *= src[j].weight;
zunionInterAggregate(&score,value,aggregate);
} else {
break;
}
}
- /* Only continue when present in every source dict. */
+ /* Only continue when present in every input. */
if (j == setnum) {
- robj *o = dictGetEntryKey(de);
- znode = zslInsert(dstzset->zsl,score,o);
- incrRefCount(o); /* added to skiplist */
- dictAdd(dstzset->dict,o,&znode->score);
- incrRefCount(o); /* added to dictionary */
+ tmp = zuiObjectFromValue(&zval);
+ znode = zslInsert(dstzset->zsl,score,tmp);
+ incrRefCount(tmp); /* added to skiplist */
+ dictAdd(dstzset->dict,tmp,&znode->score);
+ incrRefCount(tmp); /* added to dictionary */
+
+ if (tmp->encoding == REDIS_ENCODING_RAW)
+ if (sdslen(tmp->ptr) > maxelelen)
+ maxelelen = sdslen(tmp->ptr);
}
}
- dictReleaseIterator(di);
}
} else if (op == REDIS_OP_UNION) {
for (i = 0; i < setnum; i++) {
- if (!src[i].dict) continue;
+ if (zuiLength(&src[i]) == 0)
+ continue;
- di = dictGetIterator(src[i].dict);
- while((de = dictNext(di)) != NULL) {
+ while (zuiNext(&src[i],&zval)) {
double score, value;
- /* skip key when already processed */
- if (dictFind(dstzset->dict,dictGetEntryKey(de)) != NULL)
+ /* Skip key when already processed */
+ if (dictFind(dstzset->dict,zuiObjectFromValue(&zval)) != NULL)
continue;
- /* initialize score */
- score = src[i].weight * zunionInterDictValue(de);
+ /* Initialize score */
+ score = src[i].weight * zval.score;
+ if (isnan(score)) score = 0;
- /* because the zsets are sorted by size, its only possible
- * for sets at larger indices to hold this entry */
+ /* Because the inputs are sorted by size, it's only possible
+ * for sets at larger indices to hold this element. */
for (j = (i+1); j < setnum; j++) {
- dictEntry *other = dictFind(src[j].dict,dictGetEntryKey(de));
- if (other) {
- value = src[j].weight * zunionInterDictValue(other);
+ /* It is not safe to access the zset we are
+ * iterating, so explicitly check for equal object. */
+ if(src[j].subject == src[i].subject) {
+ value = zval.score*src[j].weight;
+ zunionInterAggregate(&score,value,aggregate);
+ } else if (zuiFind(&src[j],&zval,&value)) {
+ value *= src[j].weight;
zunionInterAggregate(&score,value,aggregate);
}
}
- robj *o = dictGetEntryKey(de);
- znode = zslInsert(dstzset->zsl,score,o);
- incrRefCount(o); /* added to skiplist */
- dictAdd(dstzset->dict,o,&znode->score);
- incrRefCount(o); /* added to dictionary */
+ tmp = zuiObjectFromValue(&zval);
+ znode = zslInsert(dstzset->zsl,score,tmp);
+ incrRefCount(zval.ele); /* added to skiplist */
+ dictAdd(dstzset->dict,tmp,&znode->score);
+ incrRefCount(zval.ele); /* added to dictionary */
+
+ if (tmp->encoding == REDIS_ENCODING_RAW)
+ if (sdslen(tmp->ptr) > maxelelen)
+ maxelelen = sdslen(tmp->ptr);
}
- dictReleaseIterator(di);
}
} else {
- /* unknown operator */
- redisAssert(op == REDIS_OP_INTER || op == REDIS_OP_UNION);
+ redisPanic("Unknown operator");
}
+ for (i = 0; i < setnum; i++)
+ zuiClearIterator(&src[i]);
+
if (dbDelete(c->db,dstkey)) {
signalModifiedKey(c->db,dstkey);
touched = 1;
server.dirty++;
}
if (dstzset->zsl->length) {
+ /* Convert to ziplist when in limits. */
+ if (dstzset->zsl->length <= server.zset_max_ziplist_entries &&
+ maxelelen <= server.zset_max_ziplist_value)
+ zsetConvert(dstobj,REDIS_ENCODING_ZIPLIST);
+
dbAdd(c->db,dstkey,dstobj);
- addReplyLongLong(c, dstzset->zsl->length);
+ addReplyLongLong(c,zsetLength(dstobj));
if (!touched) signalModifiedKey(c->db,dstkey);
server.dirty++;
} else {
decrRefCount(dstobj);
- addReply(c, shared.czero);
+ addReply(c,shared.czero);
}
zfree(src);
}
}
void zrangeGenericCommand(redisClient *c, int reverse) {
- robj *o;
+ robj *key = c->argv[1];
+ robj *zobj;
+ int withscores = 0;
long start;
long end;
- int withscores = 0;
int llen;
- int rangelen, j;
- zset *zsetobj;
- zskiplist *zsl;
- zskiplistNode *ln;
- robj *ele;
+ int rangelen;
if ((getLongFromObjectOrReply(c, c->argv[2], &start, NULL) != REDIS_OK) ||
(getLongFromObjectOrReply(c, c->argv[3], &end, NULL) != REDIS_OK)) return;
return;
}
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
- || checkType(c,o,REDIS_ZSET)) return;
- zsetobj = o->ptr;
- zsl = zsetobj->zsl;
- llen = zsl->length;
+ if ((zobj = lookupKeyReadOrReply(c,key,shared.emptymultibulk)) == NULL
+ || checkType(c,zobj,REDIS_ZSET)) return;
- /* convert negative indexes */
+ /* Sanitize indexes. */
+ llen = zsetLength(zobj);
if (start < 0) start = llen+start;
if (end < 0) end = llen+end;
if (start < 0) start = 0;
if (end >= llen) end = llen-1;
rangelen = (end-start)+1;
- /* check if starting point is trivial, before searching
- * the element in log(N) time */
- if (reverse) {
- ln = start == 0 ? zsl->tail : zslGetElementByRank(zsl, llen-start);
- } else {
- ln = start == 0 ?
- zsl->header->level[0].forward : zslGetElementByRank(zsl, start+1);
- }
-
/* Return the result in form of a multi-bulk reply */
- addReplyMultiBulkLen(c,withscores ? (rangelen*2) : rangelen);
- for (j = 0; j < rangelen; j++) {
- ele = ln->obj;
- addReplyBulk(c,ele);
- if (withscores)
- addReplyDouble(c,ln->score);
- ln = reverse ? ln->backward : ln->level[0].forward;
+ addReplyMultiBulkLen(c, withscores ? (rangelen*2) : rangelen);
+
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl = zobj->ptr;
+ unsigned char *eptr, *sptr;
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+
+ if (reverse)
+ eptr = ziplistIndex(zl,-2-(2*start));
+ else
+ eptr = ziplistIndex(zl,2*start);
+
+ redisAssertWithInfo(c,zobj,eptr != NULL);
+ sptr = ziplistNext(zl,eptr);
+
+ while (rangelen--) {
+ redisAssertWithInfo(c,zobj,eptr != NULL && sptr != NULL);
+ redisAssertWithInfo(c,zobj,ziplistGet(eptr,&vstr,&vlen,&vlong));
+ if (vstr == NULL)
+ addReplyBulkLongLong(c,vlong);
+ else
+ addReplyBulkCBuffer(c,vstr,vlen);
+
+ if (withscores)
+ addReplyDouble(c,zzlGetScore(sptr));
+
+ if (reverse)
+ zzlPrev(zl,&eptr,&sptr);
+ else
+ zzlNext(zl,&eptr,&sptr);
+ }
+
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+ zskiplist *zsl = zs->zsl;
+ zskiplistNode *ln;
+ robj *ele;
+
+ /* Check if starting point is trivial, before doing log(N) lookup. */
+ if (reverse) {
+ ln = zsl->tail;
+ if (start > 0)
+ ln = zslGetElementByRank(zsl,llen-start);
+ } else {
+ ln = zsl->header->level[0].forward;
+ if (start > 0)
+ ln = zslGetElementByRank(zsl,start+1);
+ }
+
+ while(rangelen--) {
+ redisAssertWithInfo(c,zobj,ln != NULL);
+ ele = ln->obj;
+ addReplyBulk(c,ele);
+ if (withscores)
+ addReplyDouble(c,ln->score);
+ ln = reverse ? ln->backward : ln->level[0].forward;
+ }
+ } else {
+ redisPanic("Unknown sorted set encoding");
}
}
zrangeGenericCommand(c,1);
}
-/* This command implements ZRANGEBYSCORE, ZREVRANGEBYSCORE and ZCOUNT.
- * If "justcount", only the number of elements in the range is returned. */
-void genericZrangebyscoreCommand(redisClient *c, int reverse, int justcount) {
+/* This command implements ZRANGEBYSCORE, ZREVRANGEBYSCORE. */
+void genericZrangebyscoreCommand(redisClient *c, int reverse) {
zrangespec range;
- robj *o, *emptyreply;
- zset *zsetobj;
- zskiplist *zsl;
- zskiplistNode *ln;
- int offset = 0, limit = -1;
+ robj *key = c->argv[1];
+ robj *zobj;
+ long offset = 0, limit = -1;
int withscores = 0;
unsigned long rangelen = 0;
void *replylen = NULL;
}
if (zslParseRange(c->argv[minidx],c->argv[maxidx],&range) != REDIS_OK) {
- addReplyError(c,"min or max is not a double");
+ addReplyError(c,"min or max is not a float");
return;
}
pos++; remaining--;
withscores = 1;
} else if (remaining >= 3 && !strcasecmp(c->argv[pos]->ptr,"limit")) {
- offset = atoi(c->argv[pos+1]->ptr);
- limit = atoi(c->argv[pos+2]->ptr);
+ if ((getLongFromObjectOrReply(c, c->argv[pos+1], &offset, NULL) != REDIS_OK) ||
+ (getLongFromObjectOrReply(c, c->argv[pos+2], &limit, NULL) != REDIS_OK)) return;
pos += 3; remaining -= 3;
} else {
addReply(c,shared.syntaxerr);
}
/* Ok, lookup the key and get the range */
- emptyreply = justcount ? shared.czero : shared.emptymultibulk;
- if ((o = lookupKeyReadOrReply(c,c->argv[1],emptyreply)) == NULL ||
- checkType(c,o,REDIS_ZSET)) return;
- zsetobj = o->ptr;
- zsl = zsetobj->zsl;
+ if ((zobj = lookupKeyReadOrReply(c,key,shared.emptymultibulk)) == NULL ||
+ checkType(c,zobj,REDIS_ZSET)) return;
- /* If reversed, get the last node in range as starting point. */
- if (reverse) {
- ln = zslLastInRange(zsl,range);
- } else {
- ln = zslFirstInRange(zsl,range);
- }
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl = zobj->ptr;
+ unsigned char *eptr, *sptr;
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+ double score;
- /* No "first" element in the specified interval. */
- if (ln == NULL) {
- addReply(c,emptyreply);
- return;
- }
+ /* If reversed, get the last node in range as starting point. */
+ if (reverse) {
+ eptr = zzlLastInRange(zl,range);
+ } else {
+ eptr = zzlFirstInRange(zl,range);
+ }
+
+ /* No "first" element in the specified interval. */
+ if (eptr == NULL) {
+ addReply(c, shared.emptymultibulk);
+ return;
+ }
- /* We don't know in advance how many matching elements there are in the
- * list, so we push this object that will represent the multi-bulk length
- * in the output buffer, and will "fix" it later */
- if (!justcount)
+ /* Get score pointer for the first element. */
+ redisAssertWithInfo(c,zobj,eptr != NULL);
+ sptr = ziplistNext(zl,eptr);
+
+ /* We don't know in advance how many matching elements there are in the
+ * list, so we push this object that will represent the multi-bulk
+ * length in the output buffer, and will "fix" it later */
replylen = addDeferredMultiBulkLength(c);
- /* If there is an offset, just traverse the number of elements without
- * checking the score because that is done in the next loop. */
- while(ln && offset--) {
- ln = reverse ? ln->backward : ln->level[0].forward;
- }
+ /* If there is an offset, just traverse the number of elements without
+ * checking the score because that is done in the next loop. */
+ while (eptr && offset--) {
+ if (reverse) {
+ zzlPrev(zl,&eptr,&sptr);
+ } else {
+ zzlNext(zl,&eptr,&sptr);
+ }
+ }
- while (ln && limit--) {
- /* Abort when the node is no longer in range. */
+ while (eptr && limit--) {
+ score = zzlGetScore(sptr);
+
+ /* Abort when the node is no longer in range. */
+ if (reverse) {
+ if (!zslValueGteMin(score,&range)) break;
+ } else {
+ if (!zslValueLteMax(score,&range)) break;
+ }
+
+ /* We know the element exists, so ziplistGet should always succeed */
+ redisAssertWithInfo(c,zobj,ziplistGet(eptr,&vstr,&vlen,&vlong));
+
+ rangelen++;
+ if (vstr == NULL) {
+ addReplyBulkLongLong(c,vlong);
+ } else {
+ addReplyBulkCBuffer(c,vstr,vlen);
+ }
+
+ if (withscores) {
+ addReplyDouble(c,score);
+ }
+
+ /* Move to next node */
+ if (reverse) {
+ zzlPrev(zl,&eptr,&sptr);
+ } else {
+ zzlNext(zl,&eptr,&sptr);
+ }
+ }
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+ zskiplist *zsl = zs->zsl;
+ zskiplistNode *ln;
+
+ /* If reversed, get the last node in range as starting point. */
if (reverse) {
- if (!zslValueGteMin(ln->score,&range)) break;
+ ln = zslLastInRange(zsl,range);
} else {
- if (!zslValueLteMax(ln->score,&range)) break;
+ ln = zslFirstInRange(zsl,range);
}
- /* Do our magic */
- rangelen++;
- if (!justcount) {
+ /* No "first" element in the specified interval. */
+ if (ln == NULL) {
+ addReply(c, shared.emptymultibulk);
+ return;
+ }
+
+ /* We don't know in advance how many matching elements there are in the
+ * list, so we push this object that will represent the multi-bulk
+ * length in the output buffer, and will "fix" it later */
+ replylen = addDeferredMultiBulkLength(c);
+
+ /* If there is an offset, just traverse the number of elements without
+ * checking the score because that is done in the next loop. */
+ while (ln && offset--) {
+ if (reverse) {
+ ln = ln->backward;
+ } else {
+ ln = ln->level[0].forward;
+ }
+ }
+
+ while (ln && limit--) {
+ /* Abort when the node is no longer in range. */
+ if (reverse) {
+ if (!zslValueGteMin(ln->score,&range)) break;
+ } else {
+ if (!zslValueLteMax(ln->score,&range)) break;
+ }
+
+ rangelen++;
addReplyBulk(c,ln->obj);
- if (withscores)
+
+ if (withscores) {
addReplyDouble(c,ln->score);
- }
+ }
- /* Move to next node */
- ln = reverse ? ln->backward : ln->level[0].forward;
+ /* Move to next node */
+ if (reverse) {
+ ln = ln->backward;
+ } else {
+ ln = ln->level[0].forward;
+ }
+ }
+ } else {
+ redisPanic("Unknown sorted set encoding");
}
- if (justcount) {
- addReplyLongLong(c,(long)rangelen);
- } else {
- setDeferredMultiBulkLength(c,replylen,
- withscores ? (rangelen*2) : rangelen);
+ if (withscores) {
+ rangelen *= 2;
}
+
+ setDeferredMultiBulkLength(c, replylen, rangelen);
}
void zrangebyscoreCommand(redisClient *c) {
- genericZrangebyscoreCommand(c,0,0);
+ genericZrangebyscoreCommand(c,0);
}
void zrevrangebyscoreCommand(redisClient *c) {
- genericZrangebyscoreCommand(c,1,0);
+ genericZrangebyscoreCommand(c,1);
}
void zcountCommand(redisClient *c) {
- genericZrangebyscoreCommand(c,0,1);
+ robj *key = c->argv[1];
+ robj *zobj;
+ zrangespec range;
+ int count = 0;
+
+ /* Parse the range arguments */
+ if (zslParseRange(c->argv[2],c->argv[3],&range) != REDIS_OK) {
+ addReplyError(c,"min or max is not a float");
+ return;
+ }
+
+ /* Lookup the sorted set */
+ if ((zobj = lookupKeyReadOrReply(c, key, shared.czero)) == NULL ||
+ checkType(c, zobj, REDIS_ZSET)) return;
+
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl = zobj->ptr;
+ unsigned char *eptr, *sptr;
+ double score;
+
+ /* Use the first element in range as the starting point */
+ eptr = zzlFirstInRange(zl,range);
+
+ /* No "first" element */
+ if (eptr == NULL) {
+ addReply(c, shared.czero);
+ return;
+ }
+
+ /* First element is in range */
+ sptr = ziplistNext(zl,eptr);
+ score = zzlGetScore(sptr);
+ redisAssertWithInfo(c,zobj,zslValueLteMax(score,&range));
+
+ /* Iterate over elements in range */
+ while (eptr) {
+ score = zzlGetScore(sptr);
+
+ /* Abort when the node is no longer in range. */
+ if (!zslValueLteMax(score,&range)) {
+ break;
+ } else {
+ count++;
+ zzlNext(zl,&eptr,&sptr);
+ }
+ }
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+ zskiplist *zsl = zs->zsl;
+ zskiplistNode *zn;
+ unsigned long rank;
+
+ /* Find first element in range */
+ zn = zslFirstInRange(zsl, range);
+
+ /* Use rank of first element, if any, to determine preliminary count */
+ if (zn != NULL) {
+ rank = zslGetRank(zsl, zn->score, zn->obj);
+ count = (zsl->length - (rank - 1));
+
+ /* Find last element in range */
+ zn = zslLastInRange(zsl, range);
+
+ /* Use rank of last element, if any, to determine the actual count */
+ if (zn != NULL) {
+ rank = zslGetRank(zsl, zn->score, zn->obj);
+ count -= (zsl->length - rank);
+ }
+ }
+ } else {
+ redisPanic("Unknown sorted set encoding");
+ }
+
+ addReplyLongLong(c, count);
}
void zcardCommand(redisClient *c) {
- robj *o;
- zset *zs;
+ robj *key = c->argv[1];
+ robj *zobj;
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
- checkType(c,o,REDIS_ZSET)) return;
+ if ((zobj = lookupKeyReadOrReply(c,key,shared.czero)) == NULL ||
+ checkType(c,zobj,REDIS_ZSET)) return;
- zs = o->ptr;
- addReplyLongLong(c,zs->zsl->length);
+ addReplyLongLong(c,zsetLength(zobj));
}
void zscoreCommand(redisClient *c) {
- robj *o;
- zset *zs;
- dictEntry *de;
+ robj *key = c->argv[1];
+ robj *zobj;
+ double score;
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
- checkType(c,o,REDIS_ZSET)) return;
+ if ((zobj = lookupKeyReadOrReply(c,key,shared.nullbulk)) == NULL ||
+ checkType(c,zobj,REDIS_ZSET)) return;
- zs = o->ptr;
- c->argv[2] = tryObjectEncoding(c->argv[2]);
- de = dictFind(zs->dict,c->argv[2]);
- if (!de) {
- addReply(c,shared.nullbulk);
- } else {
- double *score = dictGetEntryVal(de);
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ if (zzlFind(zobj->ptr,c->argv[2],&score) != NULL)
+ addReplyDouble(c,score);
+ else
+ addReply(c,shared.nullbulk);
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+ dictEntry *de;
- addReplyDouble(c,*score);
+ c->argv[2] = tryObjectEncoding(c->argv[2]);
+ de = dictFind(zs->dict,c->argv[2]);
+ if (de != NULL) {
+ score = *(double*)dictGetVal(de);
+ addReplyDouble(c,score);
+ } else {
+ addReply(c,shared.nullbulk);
+ }
+ } else {
+ redisPanic("Unknown sorted set encoding");
}
}
void zrankGenericCommand(redisClient *c, int reverse) {
- robj *o;
- zset *zs;
- zskiplist *zsl;
- dictEntry *de;
+ robj *key = c->argv[1];
+ robj *ele = c->argv[2];
+ robj *zobj;
+ unsigned long llen;
unsigned long rank;
- double *score;
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
- checkType(c,o,REDIS_ZSET)) return;
+ if ((zobj = lookupKeyReadOrReply(c,key,shared.nullbulk)) == NULL ||
+ checkType(c,zobj,REDIS_ZSET)) return;
+ llen = zsetLength(zobj);
- zs = o->ptr;
- zsl = zs->zsl;
- c->argv[2] = tryObjectEncoding(c->argv[2]);
- de = dictFind(zs->dict,c->argv[2]);
- if (!de) {
- addReply(c,shared.nullbulk);
- return;
- }
+ redisAssertWithInfo(c,ele,ele->encoding == REDIS_ENCODING_RAW);
+ if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl = zobj->ptr;
+ unsigned char *eptr, *sptr;
- score = dictGetEntryVal(de);
- rank = zslGetRank(zsl, *score, c->argv[2]);
- if (rank) {
- if (reverse) {
- addReplyLongLong(c, zsl->length - rank);
+ eptr = ziplistIndex(zl,0);
+ redisAssertWithInfo(c,zobj,eptr != NULL);
+ sptr = ziplistNext(zl,eptr);
+ redisAssertWithInfo(c,zobj,sptr != NULL);
+
+ rank = 1;
+ while(eptr != NULL) {
+ if (ziplistCompare(eptr,ele->ptr,sdslen(ele->ptr)))
+ break;
+ rank++;
+ zzlNext(zl,&eptr,&sptr);
+ }
+
+ if (eptr != NULL) {
+ if (reverse)
+ addReplyLongLong(c,llen-rank);
+ else
+ addReplyLongLong(c,rank-1);
} else {
- addReplyLongLong(c, rank-1);
+ addReply(c,shared.nullbulk);
+ }
+ } else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = zobj->ptr;
+ zskiplist *zsl = zs->zsl;
+ dictEntry *de;
+ double score;
+
+ ele = c->argv[2] = tryObjectEncoding(c->argv[2]);
+ de = dictFind(zs->dict,ele);
+ if (de != NULL) {
+ score = *(double*)dictGetVal(de);
+ rank = zslGetRank(zsl,score,ele);
+ redisAssertWithInfo(c,ele,rank); /* Existing elements always have a rank. */
+ if (reverse)
+ addReplyLongLong(c,llen-rank);
+ else
+ addReplyLongLong(c,rank-1);
+ } else {
+ addReply(c,shared.nullbulk);
}
} else {
- addReply(c,shared.nullbulk);
+ redisPanic("Unknown sorted set encoding");
}
}
projects / redis.git / blobdiff