static void zrankCommand(redisClient *c);
static void zrevrankCommand(redisClient *c);
static void hsetCommand(redisClient *c);
+static void hsetnxCommand(redisClient *c);
static void hgetCommand(redisClient *c);
static void hmsetCommand(redisClient *c);
static void hmgetCommand(redisClient *c);
{"zrank",zrankCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
{"zrevrank",zrevrankCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
{"hset",hsetCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"hsetnx",hsetnxCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
{"hget",hgetCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
{"hmset",hmsetCommand,-4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
{"hmget",hmgetCommand,-3,REDIS_CMD_BULK,NULL,1,1,1},
zrankGenericCommand(c, 1);
}
-/* =================================== Hashes =============================== */
-static void hsetCommand(redisClient *c) {
- int update = 0;
- robj *o = lookupKeyWrite(c->db,c->argv[1]);
+/* ========================= Hashes utility functions ======================= */
+#define REDIS_HASH_KEY 1
+#define REDIS_HASH_VALUE 2
- if (o == NULL) {
- o = createHashObject();
- dictAdd(c->db->dict,c->argv[1],o);
- incrRefCount(c->argv[1]);
- } else {
- if (o->type != REDIS_HASH) {
- addReply(c,shared.wrongtypeerr);
+/* Check the length of a number of objects to see if we need to convert a
+ * zipmap to a real hash. Note that we only check string encoded objects
+ * as their string length can be queried in constant time. */
+static void hashTryConversion(robj *subject, robj **argv, int start, int end) {
+ int i;
+ if (subject->encoding != REDIS_ENCODING_ZIPMAP) return;
+
+ for (i = start; i <= end; i++) {
+ if (argv[i]->encoding == REDIS_ENCODING_RAW &&
+ sdslen(argv[i]->ptr) > server.hash_max_zipmap_value)
+ {
+ convertToRealHash(subject);
return;
}
}
- /* We want to convert the zipmap into an hash table right now if the
- * entry to be added is too big. Note that we check if the object
- * is integer encoded before to try fetching the length in the test below.
- * This is because integers are small, but currently stringObjectLen()
- * performs a slow conversion: not worth it. */
- if (o->encoding == REDIS_ENCODING_ZIPMAP &&
- ((c->argv[2]->encoding == REDIS_ENCODING_RAW &&
- sdslen(c->argv[2]->ptr) > server.hash_max_zipmap_value) ||
- (c->argv[3]->encoding == REDIS_ENCODING_RAW &&
- sdslen(c->argv[3]->ptr) > server.hash_max_zipmap_value)))
- {
- convertToRealHash(o);
+}
+
+/* Get the value from a hash identified by key. Returns either a string
+ * object or NULL if the value cannot be found. The refcount of the object
+ * is always increased by 1 when the value was found. */
+static robj *hashGet(robj *o, robj *key) {
+ robj *value = NULL;
+ if (o->encoding == REDIS_ENCODING_ZIPMAP) {
+ unsigned char *v;
+ unsigned int vlen;
+ key = getDecodedObject(key);
+ if (zipmapGet(o->ptr,key->ptr,sdslen(key->ptr),&v,&vlen)) {
+ value = createStringObject((char*)v,vlen);
+ }
+ decrRefCount(key);
+ } else {
+ dictEntry *de = dictFind(o->ptr,key);
+ if (de != NULL) {
+ value = dictGetEntryVal(de);
+ incrRefCount(value);
+ }
}
+ return value;
+}
+/* Test if the key exists in the given hash. Returns 1 if the key
+ * exists and 0 when it doesn't. */
+static int hashExists(robj *o, robj *key) {
if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *zm = o->ptr;
- robj *valobj = getDecodedObject(c->argv[3]);
+ key = getDecodedObject(key);
+ if (zipmapExists(o->ptr,key->ptr,sdslen(key->ptr))) {
+ decrRefCount(key);
+ return 1;
+ }
+ decrRefCount(key);
+ } else {
+ if (dictFind(o->ptr,key) != NULL) {
+ return 1;
+ }
+ }
+ return 0;
+}
- zm = zipmapSet(zm,c->argv[2]->ptr,sdslen(c->argv[2]->ptr),
- valobj->ptr,sdslen(valobj->ptr),&update);
- decrRefCount(valobj);
- o->ptr = zm;
+/* Add an element, discard the old if the key already exists.
+ * Return 0 on insert and 1 on update. */
+static int hashSet(robj *o, robj *key, robj *value) {
+ int update = 0;
+ if (o->encoding == REDIS_ENCODING_ZIPMAP) {
+ key = getDecodedObject(key);
+ value = getDecodedObject(value);
+ o->ptr = zipmapSet(o->ptr,
+ key->ptr,sdslen(key->ptr),
+ value->ptr,sdslen(value->ptr), &update);
+ decrRefCount(key);
+ decrRefCount(value);
- /* And here there is the second check for hash conversion. */
- if (zipmapLen(zm) > server.hash_max_zipmap_entries)
+ /* Check if the zipmap needs to be upgraded to a real hash table */
+ if (zipmapLen(o->ptr) > server.hash_max_zipmap_entries)
convertToRealHash(o);
} else {
- c->argv[2] = tryObjectEncoding(c->argv[2]);
- /* note that c->argv[3] is already encoded, as the latest arg
- * of a bulk command is always integer encoded if possible. */
- if (dictReplace(o->ptr,c->argv[2],c->argv[3])) {
- incrRefCount(c->argv[2]);
+ value = tryObjectEncoding(value);
+ if (dictReplace(o->ptr,key,value)) {
+ /* Insert */
+ incrRefCount(key);
} else {
+ /* Update */
update = 1;
}
- incrRefCount(c->argv[3]);
+ incrRefCount(value);
}
- server.dirty++;
- addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",update == 0));
+ return update;
}
-static void hmsetCommand(redisClient *c) {
- int i;
- robj *o, *key, *val;
-
- if ((c->argc % 2) == 1) {
- addReplySds(c,sdsnew("-ERR wrong number of arguments for HMSET\r\n"));
- return;
+/* Delete an element from a hash.
+ * Return 1 on deleted and 0 on not found. */
+static int hashDelete(robj *o, robj *key) {
+ int deleted = 0;
+ if (o->encoding == REDIS_ENCODING_ZIPMAP) {
+ key = getDecodedObject(key);
+ o->ptr = zipmapDel(o->ptr,key->ptr,sdslen(key->ptr), &deleted);
+ decrRefCount(key);
+ } else {
+ deleted = dictDelete((dict*)o->ptr,key) == DICT_OK;
+ /* Always check if the dictionary needs a resize after a delete. */
+ if (deleted && htNeedsResize(o->ptr)) dictResize(o->ptr);
}
+ return deleted;
+}
- if ((o = lookupKeyWrite(c->db,c->argv[1])) == NULL) {
- o = createHashObject();
- dictAdd(c->db->dict,c->argv[1],o);
- incrRefCount(c->argv[1]);
+/* Return the number of elements in a hash. */
+static unsigned long hashLength(robj *o) {
+ return (o->encoding == REDIS_ENCODING_ZIPMAP) ?
+ zipmapLen((unsigned char*)o->ptr) : dictSize((dict*)o->ptr);
+}
+
+/* Structure to hold hash iteration abstration. Note that iteration over
+ * hashes involves both fields and values. Because it is possible that
+ * not both are required, store pointers in the iterator to avoid
+ * unnecessary memory allocation for fields/values. */
+typedef struct {
+ int encoding;
+ unsigned char *zi;
+ unsigned char *zk, *zv;
+ unsigned int zklen, zvlen;
+
+ dictIterator *di;
+ dictEntry *de;
+} hashIterator;
+
+static hashIterator *hashInitIterator(robj *subject) {
+ hashIterator *hi = zmalloc(sizeof(hashIterator));
+ hi->encoding = subject->encoding;
+ if (hi->encoding == REDIS_ENCODING_ZIPMAP) {
+ hi->zi = zipmapRewind(subject->ptr);
+ } else if (hi->encoding == REDIS_ENCODING_HT) {
+ hi->di = dictGetIterator(subject->ptr);
} else {
- if (o->type != REDIS_HASH) {
- addReply(c,shared.wrongtypeerr);
- return;
- }
+ redisAssert(NULL);
}
+ return hi;
+}
- /* We want to convert the zipmap into an hash table right now if the
- * entry to be added is too big. */
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- for (i = 2; i < c->argc; i+=2) {
- if ((c->argv[i]->encoding == REDIS_ENCODING_RAW &&
- sdslen(c->argv[i]->ptr) > server.hash_max_zipmap_value) ||
- (c->argv[i+1]->encoding == REDIS_ENCODING_RAW &&
- sdslen(c->argv[i+1]->ptr) > server.hash_max_zipmap_value)) {
- convertToRealHash(o);
- break;
- }
- }
+static void hashReleaseIterator(hashIterator *hi) {
+ if (hi->encoding == REDIS_ENCODING_HT) {
+ dictReleaseIterator(hi->di);
}
+ zfree(hi);
+}
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *zm = o->ptr;
+/* Move to the next entry in the hash. Return REDIS_OK when the next entry
+ * could be found and REDIS_ERR when the iterator reaches the end. */
+static int hashNext(hashIterator *hi) {
+ if (hi->encoding == REDIS_ENCODING_ZIPMAP) {
+ if ((hi->zi = zipmapNext(hi->zi, &hi->zk, &hi->zklen,
+ &hi->zv, &hi->zvlen)) == NULL) return REDIS_ERR;
+ } else {
+ if ((hi->de = dictNext(hi->di)) == NULL) return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
- for (i = 2; i < c->argc; i+=2) {
- key = getDecodedObject(c->argv[i]);
- val = getDecodedObject(c->argv[i+1]);
- zm = zipmapSet(zm,key->ptr,sdslen(key->ptr),
- val->ptr,sdslen(val->ptr),NULL);
- decrRefCount(key);
- decrRefCount(val);
- o->ptr = zm;
+/* Get key or value object at current iteration position.
+ * This increases the refcount of the field object by 1. */
+static robj *hashCurrent(hashIterator *hi, int what) {
+ robj *o;
+ if (hi->encoding == REDIS_ENCODING_ZIPMAP) {
+ if (what & REDIS_HASH_KEY) {
+ o = createStringObject((char*)hi->zk,hi->zklen);
+ } else {
+ o = createStringObject((char*)hi->zv,hi->zvlen);
}
-
- /* And here there is the second check for hash conversion. */
- if (zipmapLen(zm) > server.hash_max_zipmap_entries)
- convertToRealHash(o);
} else {
- for (i = 2; i < c->argc; i+=2) {
- key = tryObjectEncoding(c->argv[i]);
- val = tryObjectEncoding(c->argv[i+1]);
- if (dictReplace(o->ptr,key,val)) {
- incrRefCount(key);
- }
- incrRefCount(val);
+ if (what & REDIS_HASH_KEY) {
+ o = dictGetEntryKey(hi->de);
+ } else {
+ o = dictGetEntryVal(hi->de);
}
+ incrRefCount(o);
}
-
- addReply(c, shared.ok);
+ return o;
}
-static void hincrbyCommand(redisClient *c) {
- long long value = 0, incr = 0;
- robj *o = lookupKeyWrite(c->db,c->argv[1]);
-
+static robj *hashLookupWriteOrCreate(redisClient *c, robj *key) {
+ robj *o = lookupKeyWrite(c->db,key);
if (o == NULL) {
o = createHashObject();
- dictAdd(c->db->dict,c->argv[1],o);
- incrRefCount(c->argv[1]);
+ dictAdd(c->db->dict,key,o);
+ incrRefCount(key);
} else {
if (o->type != REDIS_HASH) {
addReply(c,shared.wrongtypeerr);
- return;
+ return NULL;
}
}
+ return o;
+}
- if (getLongLongFromObject(c, c->argv[3], &incr) != REDIS_OK) return;
+/* ============================= Hash commands ============================== */
+static void hsetCommand(redisClient *c) {
+ int update;
+ robj *o;
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *zm = o->ptr;
- unsigned char *zval;
- unsigned int zvlen;
-
- /* Find value if already present in hash */
- if (zipmapGet(zm,c->argv[2]->ptr,sdslen(c->argv[2]->ptr),
- &zval,&zvlen)) {
- /* strtoll needs the char* to have a trailing \0, but
- * the zipmap doesn't include them. */
- sds szval = sdsnewlen(zval, zvlen);
- value = strtoll(szval,NULL,10);
- sdsfree(szval);
- }
-
- value += incr;
- sds svalue = sdscatprintf(sdsempty(),"%lld",value);
- zm = zipmapSet(zm,c->argv[2]->ptr,sdslen(c->argv[2]->ptr),
- (unsigned char*)svalue,sdslen(svalue),NULL);
- sdsfree(svalue);
- o->ptr = zm;
-
- /* Check if the zipmap needs to be converted. */
- if (zipmapLen(zm) > server.hash_max_zipmap_entries)
- convertToRealHash(o);
+ if ((o = hashLookupWriteOrCreate(c,c->argv[1])) == NULL) return;
+ hashTryConversion(o,c->argv,2,3);
+ update = hashSet(o,c->argv[2],c->argv[3]);
+ addReply(c, update ? shared.czero : shared.cone);
+ server.dirty++;
+}
+
+static void hsetnxCommand(redisClient *c) {
+ robj *o;
+ if ((o = hashLookupWriteOrCreate(c,c->argv[1])) == NULL) return;
+ hashTryConversion(o,c->argv,2,3);
+
+ if (hashExists(o, c->argv[2])) {
+ addReply(c, shared.czero);
} else {
- robj *hval;
- dictEntry *de;
+ hashSet(o,c->argv[2],c->argv[3]);
+ addReply(c, shared.cone);
+ server.dirty++;
+ }
+}
- /* Find value if already present in hash */
- de = dictFind(o->ptr,c->argv[2]);
- if (de != NULL) {
- hval = dictGetEntryVal(de);
- if (hval->encoding == REDIS_ENCODING_RAW)
- value = strtoll(hval->ptr,NULL,10);
- else if (hval->encoding == REDIS_ENCODING_INT)
- value = (long)hval->ptr;
- else
- redisAssert(1 != 1);
- }
+static void hmsetCommand(redisClient *c) {
+ int i;
+ robj *o;
- value += incr;
- hval = createObject(REDIS_STRING,sdscatprintf(sdsempty(),"%lld",value));
- hval = tryObjectEncoding(hval);
- if (dictReplace(o->ptr,c->argv[2],hval)) {
- incrRefCount(c->argv[2]);
- }
+ if ((c->argc % 2) == 1) {
+ addReplySds(c,sdsnew("-ERR wrong number of arguments for HMSET\r\n"));
+ return;
}
+ if ((o = hashLookupWriteOrCreate(c,c->argv[1])) == NULL) return;
+ hashTryConversion(o,c->argv,2,c->argc-1);
+ for (i = 2; i < c->argc; i += 2) {
+ hashSet(o,c->argv[i],c->argv[i+1]);
+ }
+ addReply(c, shared.ok);
+}
+
+static void hincrbyCommand(redisClient *c) {
+ long long value, incr;
+ robj *o, *current, *new;
+
+ if (getLongLongFromObject(c,c->argv[3],&incr) != REDIS_OK) return;
+ if ((o = hashLookupWriteOrCreate(c,c->argv[1])) == NULL) return;
+ if ((current = hashGet(o,c->argv[2])) != NULL) {
+ if (current->encoding == REDIS_ENCODING_RAW)
+ value = strtoll(current->ptr,NULL,10);
+ else if (current->encoding == REDIS_ENCODING_INT)
+ value = (long)current->ptr;
+ else
+ redisAssert(1 != 1);
+ decrRefCount(current);
+ } else {
+ value = 0;
+ }
+
+ value += incr;
+ new = createObject(REDIS_STRING,sdscatprintf(sdsempty(),"%lld",value));
+ hashSet(o,c->argv[2],new);
+ decrRefCount(new);
+ addReplyLongLong(c,value);
server.dirty++;
- addReplyLongLong(c, value);
}
static void hgetCommand(redisClient *c) {
- robj *o;
-
+ robj *o, *value;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
checkType(c,o,REDIS_HASH)) return;
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *zm = o->ptr;
- unsigned char *val;
- unsigned int vlen;
- robj *field;
-
- field = getDecodedObject(c->argv[2]);
- if (zipmapGet(zm,field->ptr,sdslen(field->ptr), &val,&vlen)) {
- addReplySds(c,sdscatprintf(sdsempty(),"$%u\r\n", vlen));
- addReplySds(c,sdsnewlen(val,vlen));
- addReply(c,shared.crlf);
- decrRefCount(field);
- return;
- } else {
- addReply(c,shared.nullbulk);
- decrRefCount(field);
- return;
- }
+ if ((value = hashGet(o,c->argv[2])) != NULL) {
+ addReplyBulk(c,value);
+ decrRefCount(value);
} else {
- struct dictEntry *de;
-
- de = dictFind(o->ptr,c->argv[2]);
- if (de == NULL) {
- addReply(c,shared.nullbulk);
- } else {
- robj *e = dictGetEntryVal(de);
-
- addReplyBulk(c,e);
- }
+ addReply(c,shared.nullbulk);
}
}
static void hmgetCommand(redisClient *c) {
int i;
-
- robj *o = lookupKeyRead(c->db, c->argv[1]);
- if (o == NULL) {
- addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",c->argc-2));
- for (i = 2; i < c->argc; i++) {
- addReply(c,shared.nullbulk);
- }
- return;
- } else {
- if (o->type != REDIS_HASH) {
- addReply(c,shared.wrongtypeerr);
- return;
- }
+ robj *o, *value;
+ o = lookupKeyRead(c->db,c->argv[1]);
+ if (o != NULL && o->type != REDIS_HASH) {
+ addReply(c,shared.wrongtypeerr);
}
+ /* Note the check for o != NULL happens inside the loop. This is
+ * done because objects that cannot be found are considered to be
+ * an empty hash. The reply should then be a series of NULLs. */
addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",c->argc-2));
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *zm = o->ptr;
- unsigned char *v;
- unsigned int vlen;
- robj *field;
-
- for (i = 2; i < c->argc; i++) {
- field = getDecodedObject(c->argv[i]);
- if (zipmapGet(zm,field->ptr,sdslen(field->ptr),&v,&vlen)) {
- addReplySds(c,sdscatprintf(sdsempty(),"$%u\r\n", vlen));
- addReplySds(c,sdsnewlen(v,vlen));
- addReply(c,shared.crlf);
- } else {
- addReply(c,shared.nullbulk);
- }
- decrRefCount(field);
- }
- } else {
- dictEntry *de;
-
- for (i = 2; i < c->argc; i++) {
- de = dictFind(o->ptr,c->argv[i]);
- if (de != NULL) {
- addReplyBulk(c,(robj*)dictGetEntryVal(de));
- } else {
- addReply(c,shared.nullbulk);
- }
+ for (i = 2; i < c->argc; i++) {
+ if (o != NULL && (value = hashGet(o,c->argv[i])) != NULL) {
+ addReplyBulk(c,value);
+ decrRefCount(value);
+ } else {
+ addReply(c,shared.nullbulk);
}
}
}
static void hdelCommand(redisClient *c) {
robj *o;
- int deleted = 0;
-
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,o,REDIS_HASH)) return;
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- robj *field = getDecodedObject(c->argv[2]);
-
- o->ptr = zipmapDel((unsigned char*) o->ptr,
- (unsigned char*) field->ptr,
- sdslen(field->ptr), &deleted);
- decrRefCount(field);
- if (zipmapLen((unsigned char*) o->ptr) == 0)
- deleteKey(c->db,c->argv[1]);
+ if (hashDelete(o,c->argv[2])) {
+ if (hashLength(o) == 0) deleteKey(c->db,c->argv[1]);
+ addReply(c,shared.cone);
+ server.dirty++;
} else {
- deleted = dictDelete((dict*)o->ptr,c->argv[2]) == DICT_OK;
- if (htNeedsResize(o->ptr)) dictResize(o->ptr);
- if (dictSize((dict*)o->ptr) == 0) deleteKey(c->db,c->argv[1]);
+ addReply(c,shared.czero);
}
- if (deleted) server.dirty++;
- addReply(c,deleted ? shared.cone : shared.czero);
}
static void hlenCommand(redisClient *c) {
robj *o;
- unsigned long len;
-
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,o,REDIS_HASH)) return;
- len = (o->encoding == REDIS_ENCODING_ZIPMAP) ?
- zipmapLen((unsigned char*)o->ptr) : dictSize((dict*)o->ptr);
- addReplyUlong(c,len);
+ addReplyUlong(c,hashLength(o));
}
-#define REDIS_GETALL_KEYS 1
-#define REDIS_GETALL_VALS 2
static void genericHgetallCommand(redisClient *c, int flags) {
- robj *o, *lenobj;
+ robj *o, *lenobj, *obj;
unsigned long count = 0;
+ hashIterator *hi;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
|| checkType(c,o,REDIS_HASH)) return;
addReply(c,lenobj);
decrRefCount(lenobj);
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *p = zipmapRewind(o->ptr);
- unsigned char *field, *val;
- unsigned int flen, vlen;
-
- while((p = zipmapNext(p,&field,&flen,&val,&vlen)) != NULL) {
- robj *aux;
-
- if (flags & REDIS_GETALL_KEYS) {
- aux = createStringObject((char*)field,flen);
- addReplyBulk(c,aux);
- decrRefCount(aux);
- count++;
- }
- if (flags & REDIS_GETALL_VALS) {
- aux = createStringObject((char*)val,vlen);
- addReplyBulk(c,aux);
- decrRefCount(aux);
- count++;
- }
+ hi = hashInitIterator(o);
+ while (hashNext(hi) != REDIS_ERR) {
+ if (flags & REDIS_HASH_KEY) {
+ obj = hashCurrent(hi,REDIS_HASH_KEY);
+ addReplyBulk(c,obj);
+ decrRefCount(obj);
+ count++;
}
- } else {
- dictIterator *di = dictGetIterator(o->ptr);
- dictEntry *de;
-
- while((de = dictNext(di)) != NULL) {
- robj *fieldobj = dictGetEntryKey(de);
- robj *valobj = dictGetEntryVal(de);
-
- if (flags & REDIS_GETALL_KEYS) {
- addReplyBulk(c,fieldobj);
- count++;
- }
- if (flags & REDIS_GETALL_VALS) {
- addReplyBulk(c,valobj);
- count++;
- }
+ if (flags & REDIS_HASH_VALUE) {
+ obj = hashCurrent(hi,REDIS_HASH_VALUE);
+ addReplyBulk(c,obj);
+ decrRefCount(obj);
+ count++;
}
- dictReleaseIterator(di);
}
+ hashReleaseIterator(hi);
+
lenobj->ptr = sdscatprintf(sdsempty(),"*%lu\r\n",count);
}
static void hkeysCommand(redisClient *c) {
- genericHgetallCommand(c,REDIS_GETALL_KEYS);
+ genericHgetallCommand(c,REDIS_HASH_KEY);
}
static void hvalsCommand(redisClient *c) {
- genericHgetallCommand(c,REDIS_GETALL_VALS);
+ genericHgetallCommand(c,REDIS_HASH_VALUE);
}
static void hgetallCommand(redisClient *c) {
- genericHgetallCommand(c,REDIS_GETALL_KEYS|REDIS_GETALL_VALS);
+ genericHgetallCommand(c,REDIS_HASH_KEY|REDIS_HASH_VALUE);
}
static void hexistsCommand(redisClient *c) {
robj *o;
- int exists = 0;
-
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,o,REDIS_HASH)) return;
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- robj *field;
- unsigned char *zm = o->ptr;
-
- field = getDecodedObject(c->argv[2]);
- exists = zipmapExists(zm,field->ptr,sdslen(field->ptr));
- decrRefCount(field);
- } else {
- exists = dictFind(o->ptr,c->argv[2]) != NULL;
- }
- addReply(c,exists ? shared.cone : shared.czero);
+ addReply(c, hashExists(o,c->argv[2]) ? shared.cone : shared.czero);
}
static void convertToRealHash(robj *o) {
/* Return the value associated to the key with a name obtained
* substituting the first occurence of '*' in 'pattern' with 'subst' */
static robj *lookupKeyByPattern(redisDb *db, robj *pattern, robj *subst) {
- char *p;
+ char *p, *f;
sds spat, ssub;
- robj keyobj;
- int prefixlen, sublen, postfixlen;
+ robj keyobj, fieldobj, *o;
+ int prefixlen, sublen, postfixlen, fieldlen;
/* Expoit the internal sds representation to create a sds string allocated on the stack in order to make this function faster */
struct {
long len;
long free;
char buf[REDIS_SORTKEY_MAX+1];
- } keyname;
+ } keyname, fieldname;
/* If the pattern is "#" return the substitution object itself in order
* to implement the "SORT ... GET #" feature. */
return NULL;
}
+ /* Find out if we're dealing with a hash dereference. */
+ if ((f = strstr(p+1, "->")) != NULL) {
+ fieldlen = sdslen(spat)-(f-spat);
+ /* this also copies \0 character */
+ memcpy(fieldname.buf,f+2,fieldlen-1);
+ fieldname.len = fieldlen-2;
+ } else {
+ fieldlen = 0;
+ }
+
prefixlen = p-spat;
sublen = sdslen(ssub);
- postfixlen = sdslen(spat)-(prefixlen+1);
+ postfixlen = sdslen(spat)-(prefixlen+1)-fieldlen;
memcpy(keyname.buf,spat,prefixlen);
memcpy(keyname.buf+prefixlen,ssub,sublen);
memcpy(keyname.buf+prefixlen+sublen,p+1,postfixlen);
keyname.buf[prefixlen+sublen+postfixlen] = '\0';
keyname.len = prefixlen+sublen+postfixlen;
-
- initStaticStringObject(keyobj,((char*)&keyname)+(sizeof(long)*2))
decrRefCount(subst);
- /* printf("lookup '%s' => %p\n", keyname.buf,de); */
- return lookupKeyRead(db,&keyobj);
+ /* Lookup substituted key */
+ initStaticStringObject(keyobj,((char*)&keyname)+(sizeof(long)*2));
+ o = lookupKeyRead(db,&keyobj);
+
+ if (o != NULL && fieldlen > 0) {
+ /* Retrieve value from hash by the field name. This operation
+ * already increases the refcount of the returned object. */
+ if (o->type != REDIS_HASH || fieldname.len < 1) {
+ return NULL;
+ }
+ initStaticStringObject(fieldobj,((char*)&fieldname)+(sizeof(long)*2));
+ o = hashGet(o, &fieldobj);
+ } else {
+ if (o->type != REDIS_STRING) {
+ return NULL;
+ }
+
+ /* Every object that this function returns needs to have its refcount
+ * increased. sortCommand decreases it again. */
+ incrRefCount(o);
+ }
+
+ return o;
}
/* sortCompare() is used by qsort in sortCommand(). Given that qsort_r with
cmp = strcoll(so1->u.cmpobj->ptr,so2->u.cmpobj->ptr);
}
} else {
- /* Compare elements directly */
- robj *dec1, *dec2;
-
- dec1 = getDecodedObject(so1->obj);
- dec2 = getDecodedObject(so2->obj);
- cmp = strcoll(dec1->ptr,dec2->ptr);
- decrRefCount(dec1);
- decrRefCount(dec2);
+ /* Compare elements directly. Note that these objects already
+ * need to be non-encoded (see sortCommand). */
+ cmp = strcoll(so1->obj->ptr,so2->obj->ptr);
}
}
return server.sort_desc ? -cmp : cmp;
/* Now it's time to load the right scores in the sorting vector */
if (dontsort == 0) {
for (j = 0; j < vectorlen; j++) {
+ robj *byval;
if (sortby) {
- robj *byval;
-
+ /* lookup value to sort by */
byval = lookupKeyByPattern(c->db,sortby,vector[j].obj);
- if (!byval || byval->type != REDIS_STRING) continue;
- if (alpha) {
- vector[j].u.cmpobj = getDecodedObject(byval);
- } else {
- if (byval->encoding == REDIS_ENCODING_RAW) {
- vector[j].u.score = strtod(byval->ptr,NULL);
- } else {
- /* Don't need to decode the object if it's
- * integer-encoded (the only encoding supported) so
- * far. We can just cast it */
- if (byval->encoding == REDIS_ENCODING_INT) {
- vector[j].u.score = (long)byval->ptr;
- } else
- redisAssert(1 != 1);
- }
- }
+ if (!byval) continue;
} else {
- if (!alpha) {
- if (vector[j].obj->encoding == REDIS_ENCODING_RAW)
- vector[j].u.score = strtod(vector[j].obj->ptr,NULL);
- else {
- if (vector[j].obj->encoding == REDIS_ENCODING_INT)
- vector[j].u.score = (long) vector[j].obj->ptr;
- else
- redisAssert(1 != 1);
- }
+ /* use object itself to sort by */
+ byval = vector[j].obj;
+ }
+
+ if (alpha) {
+ vector[j].u.cmpobj = getDecodedObject(byval);
+ } else {
+ if (byval->encoding == REDIS_ENCODING_RAW) {
+ vector[j].u.score = strtod(byval->ptr,NULL);
+ } else if (byval->encoding == REDIS_ENCODING_INT) {
+ /* Don't need to decode the object if it's
+ * integer-encoded (the only encoding supported) so
+ * far. We can just cast it */
+ vector[j].u.score = (long)byval->ptr;
+ } else {
+ redisAssert(1 != 1);
}
}
+
+ /* when the object was retrieved using lookupKeyByPattern,
+ * its refcount needs to be decreased. */
+ if (sortby) {
+ decrRefCount(byval);
+ }
}
}
decrRefCount(sortval);
listRelease(operations);
for (j = 0; j < vectorlen; j++) {
- if (sortby && alpha && vector[j].u.cmpobj)
+ if (alpha && vector[j].u.cmpobj)
decrRefCount(vector[j].u.cmpobj);
}
zfree(vector);
projects / redis.git / blobdiff