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ZINCRSCOREBY implemented

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antirez 2009-11-19 19:48:46 +01:00
parent 37f68e6102
commit e2665397a7
2 changed files with 74 additions and 22 deletions
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1
redis-cli.c
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@ -93,6 +93,7 @@ static struct redisCommand cmdTable[] = {
{"sdiffstore",-3,REDIS_CMD_INLINE},
{"smembers",2,REDIS_CMD_INLINE},
{"zadd",4,REDIS_CMD_BULK},
{"zincrscoreby",4,REDIS_CMD_BULK},
{"zrem",3,REDIS_CMD_BULK},
{"zremrangebyscore",4,REDIS_CMD_INLINE},
{"zrange",4,REDIS_CMD_INLINE},

95
redis.c
View File

@ -466,6 +466,7 @@ static void debugCommand(redisClient *c);
static void msetCommand(redisClient *c);
static void msetnxCommand(redisClient *c);
static void zaddCommand(redisClient *c);
static void zincrscorebyCommand(redisClient *c);
static void zrangeCommand(redisClient *c);
static void zrangebyscoreCommand(redisClient *c);
static void zrevrangeCommand(redisClient *c);
@ -513,6 +514,7 @@ static struct redisCommand cmdTable[] = {
{"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
{"smembers",sinterCommand,2,REDIS_CMD_INLINE},
{"zadd",zaddCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
{"zincrscoreby",zincrscorebyCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
{"zrem",zremCommand,3,REDIS_CMD_BULK},
{"zremrangebyscore",zremrangebyscoreCommand,4,REDIS_CMD_INLINE},
{"zrange",zrangeCommand,4,REDIS_CMD_INLINE},
@ -1383,7 +1385,6 @@ static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask)
REDIS_NOTUSED(el);
REDIS_NOTUSED(mask);
/* Use writev() if we have enough buffers to send */
if (!server.glueoutputbuf &&
listLength(c->reply) > REDIS_WRITEV_THRESHOLD &&
@ -1939,6 +1940,14 @@ static void addReplySds(redisClient *c, sds s) {
decrRefCount(o);
}
static void addReplyDouble(redisClient *c, double d) {
char buf[128];
snprintf(buf,sizeof(buf),"%.17g",d);
addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n%s\r\n",
strlen(buf),buf));
}
static void addReplyBulkLen(redisClient *c, robj *obj) {
size_t len;
@ -4220,56 +4229,101 @@ static zskiplistNode *zslFirstWithScore(zskiplist *zsl, double score) {
/* The actual Z-commands implementations */
static void zaddCommand(redisClient *c) {
/* This generic command implements both ZADD and ZINCRSCOREBY.
* scoreval is the score if the operation is a ZADD (doincrement == 0) or
* the increment if the operation is a ZINCRSCOREBY (doincrement == 1). */
static void zaddGenericCommand(redisClient *c, robj *key, robj *ele, double scoreval, int doincrement) {
robj *zsetobj;
zset *zs;
double *score;
zsetobj = lookupKeyWrite(c->db,c->argv[1]);
zsetobj = lookupKeyWrite(c->db,key);
if (zsetobj == NULL) {
zsetobj = createZsetObject();
dictAdd(c->db->dict,c->argv[1],zsetobj);
incrRefCount(c->argv[1]);
dictAdd(c->db->dict,key,zsetobj);
incrRefCount(key);
} else {
if (zsetobj->type != REDIS_ZSET) {
addReply(c,shared.wrongtypeerr);
return;
}
}
score = zmalloc(sizeof(double));
*score = strtod(c->argv[2]->ptr,NULL);
zs = zsetobj->ptr;
if (dictAdd(zs->dict,c->argv[3],score) == DICT_OK) {
/* Ok now since we implement both ZADD and ZINCRSCOREBY here the code
* needs to handle the two different conditions. It's all about setting
* '*score', that is, the new score to set, to the right value. */
score = zmalloc(sizeof(double));
if (doincrement) {
dictEntry *de;
/* Read the old score. If the element was not present starts from 0 */
de = dictFind(zs->dict,ele);
if (de) {
double *oldscore = dictGetEntryVal(de);
*score = *oldscore + scoreval;
} else {
*score = scoreval;
}
} else {
*score = scoreval;
}
/* What follows is a simple remove and re-insert operation that is common
* to both ZADD and ZINCRSCOREBY... */
if (dictAdd(zs->dict,ele,score) == DICT_OK) {
/* case 1: New element */
incrRefCount(c->argv[3]); /* added to hash */
zslInsert(zs->zsl,*score,c->argv[3]);
incrRefCount(c->argv[3]); /* added to skiplist */
incrRefCount(ele); /* added to hash */
zslInsert(zs->zsl,*score,ele);
incrRefCount(ele); /* added to skiplist */
server.dirty++;
addReply(c,shared.cone);
if (doincrement)
addReply(c,shared.cone);
else
addReplyDouble(c,*score);
} else {
dictEntry *de;
double *oldscore;
/* case 2: Score update operation */
de = dictFind(zs->dict,c->argv[3]);
de = dictFind(zs->dict,ele);
assert(de != NULL);
oldscore = dictGetEntryVal(de);
if (*score != *oldscore) {
int deleted;
deleted = zslDelete(zs->zsl,*oldscore,c->argv[3]);
/* Remove and insert the element in the skip list with new score */
deleted = zslDelete(zs->zsl,*oldscore,ele);
assert(deleted != 0);
zslInsert(zs->zsl,*score,c->argv[3]);
incrRefCount(c->argv[3]);
dictReplace(zs->dict,c->argv[3],score);
zslInsert(zs->zsl,*score,ele);
incrRefCount(ele);
/* Update the score in the hash table */
dictReplace(zs->dict,ele,score);
server.dirty++;
} else {
zfree(score);
}
addReply(c,shared.czero);
if (doincrement)
addReplyDouble(c,*score);
else
addReply(c,shared.czero);
}
}
static void zaddCommand(redisClient *c) {
double scoreval;
scoreval = strtod(c->argv[2]->ptr,NULL);
zaddGenericCommand(c,c->argv[1],c->argv[3],scoreval,0);
}
static void zincrscorebyCommand(redisClient *c) {
double scoreval;
scoreval = strtod(c->argv[2]->ptr,NULL);
zaddGenericCommand(c,c->argv[1],c->argv[3],scoreval,1);
}
static void zremCommand(redisClient *c) {
robj *zsetobj;
zset *zs;
@ -4478,12 +4532,9 @@ static void zscoreCommand(redisClient *c) {
if (!de) {
addReply(c,shared.nullbulk);
} else {
char buf[128];
double *score = dictGetEntryVal(de);
snprintf(buf,sizeof(buf),"%.17g",*score);
addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n%s\r\n",
strlen(buf),buf));
addReplyDouble(c,*score);
}
}
}