#include "redis.h"
-
#include <math.h>
/*-----------------------------------------------------------------------------
*----------------------------------------------------------------------------*/
/* 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
+ * ziplist to a real hash. Note that we only check string encoded objects
* as their string length can be queried in constant time. */
-void hashTypeTryConversion(robj *subject, robj **argv, int start, int end) {
+void hashTypeTryConversion(robj *o, robj **argv, int start, int end) {
int i;
- if (subject->encoding != REDIS_ENCODING_ZIPMAP) return;
+
+ if (o->encoding != REDIS_ENCODING_ZIPLIST) return;
for (i = start; i <= end; i++) {
if (argv[i]->encoding == REDIS_ENCODING_RAW &&
- sdslen(argv[i]->ptr) > server.hash_max_zipmap_value)
+ sdslen(argv[i]->ptr) > server.hash_max_ziplist_value)
{
- convertToRealHash(subject);
- return;
+ hashTypeConvert(o, REDIS_ENCODING_HT);
+ break;
}
}
}
}
}
-/* Get the value from a hash identified by key.
- *
- * If the string is found either REDIS_ENCODING_HT or REDIS_ENCODING_ZIPMAP
- * is returned, and either **objval or **v and *vlen are set accordingly,
- * so that objects in hash tables are returend as objects and pointers
- * inside a zipmap are returned as such.
- *
- * If the object was not found -1 is returned.
- *
- * This function is copy on write friendly as there is no incr/decr
- * of refcount needed if objects are accessed just for reading operations. */
-int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v,
- unsigned int *vlen)
+/* Get the value from a ziplist encoded hash, identified by field.
+ * Returns -1 when the field cannot be found. */
+int hashTypeGetFromZiplist(robj *o, robj *field,
+ unsigned char **vstr,
+ unsigned int *vlen,
+ long long *vll)
{
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- int found;
+ unsigned char *zl, *fptr = NULL, *vptr = NULL;
+ int ret;
- key = getDecodedObject(key);
- found = zipmapGet(o->ptr,key->ptr,sdslen(key->ptr),v,vlen);
- decrRefCount(key);
- if (!found) return -1;
- } else {
- dictEntry *de = dictFind(o->ptr,key);
- if (de == NULL) return -1;
- *objval = dictGetEntryVal(de);
+ redisAssert(o->encoding == REDIS_ENCODING_ZIPLIST);
+
+ field = getDecodedObject(field);
+
+ zl = o->ptr;
+ fptr = ziplistIndex(zl, ZIPLIST_HEAD);
+ if (fptr != NULL) {
+ fptr = ziplistFind(fptr, field->ptr, sdslen(field->ptr), 1);
+ if (fptr != NULL) {
+ /* Grab pointer to the value (fptr points to the field) */
+ vptr = ziplistNext(zl, fptr);
+ redisAssert(vptr != NULL);
+ }
}
- return o->encoding;
+
+ decrRefCount(field);
+
+ if (vptr != NULL) {
+ ret = ziplistGet(vptr, vstr, vlen, vll);
+ redisAssert(ret);
+ return 0;
+ }
+
+ return -1;
+}
+
+/* Get the value from a hash table encoded hash, identified by field.
+ * Returns -1 when the field cannot be found. */
+int hashTypeGetFromHashTable(robj *o, robj *field, robj **value) {
+ dictEntry *de;
+
+ redisAssert(o->encoding == REDIS_ENCODING_HT);
+
+ de = dictFind(o->ptr, field);
+ if (de == NULL) return -1;
+ *value = dictGetVal(de);
+ return 0;
}
-/* Higher level function of hashTypeGet() that always returns a Redis
+/* Higher level function of hashTypeGet*() that always returns a Redis
* object (either new or with refcount incremented), so that the caller
* can retain a reference or call decrRefCount after the usage.
*
* The lower level function can prevent copy on write so it is
* the preferred way of doing read operations. */
-robj *hashTypeGetObject(robj *o, robj *key) {
- robj *objval;
- unsigned char *v;
- unsigned int vlen;
-
- int encoding = hashTypeGet(o,key,&objval,&v,&vlen);
- switch(encoding) {
- case REDIS_ENCODING_HT:
- incrRefCount(objval);
- return objval;
- case REDIS_ENCODING_ZIPMAP:
- objval = createStringObject((char*)v,vlen);
- return objval;
- default: return NULL;
- }
-}
-
-/* Test if the key exists in the given hash. Returns 1 if the key
- * exists and 0 when it doesn't. */
-int hashTypeExists(robj *o, robj *key) {
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- key = getDecodedObject(key);
- if (zipmapExists(o->ptr,key->ptr,sdslen(key->ptr))) {
- decrRefCount(key);
- return 1;
+robj *hashTypeGetObject(robj *o, robj *field) {
+ robj *value = NULL;
+
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr = NULL;
+ unsigned int vlen = UINT_MAX;
+ long long vll = LLONG_MAX;
+
+ if (hashTypeGetFromZiplist(o, field, &vstr, &vlen, &vll) == 0) {
+ if (vstr) {
+ value = createStringObject((char*)vstr, vlen);
+ } else {
+ value = createStringObjectFromLongLong(vll);
+ }
}
- decrRefCount(key);
- } else {
- if (dictFind(o->ptr,key) != NULL) {
- return 1;
+
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ robj *aux;
+
+ if (hashTypeGetFromHashTable(o, field, &aux) == 0) {
+ incrRefCount(aux);
+ value = aux;
}
+ } else {
+ redisPanic("Unknown hash encoding");
+ }
+ return value;
+}
+
+/* Test if the specified field exists in the given hash. Returns 1 if the field
+ * exists, and 0 when it doesn't. */
+int hashTypeExists(robj *o, robj *field) {
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr = NULL;
+ unsigned int vlen = UINT_MAX;
+ long long vll = LLONG_MAX;
+
+ if (hashTypeGetFromZiplist(o, field, &vstr, &vlen, &vll) == 0) return 1;
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ robj *aux;
+
+ if (hashTypeGetFromHashTable(o, field, &aux) == 0) return 1;
+ } else {
+ redisPanic("Unknown hash encoding");
}
return 0;
}
/* Add an element, discard the old if the key already exists.
- * Return 0 on insert and 1 on update. */
-int hashTypeSet(robj *o, robj *key, robj *value) {
+ * Return 0 on insert and 1 on update.
+ * This function will take care of incrementing the reference count of the
+ * retained fields and value objects. */
+int hashTypeSet(robj *o, robj *field, robj *value) {
int update = 0;
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- key = getDecodedObject(key);
+
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl, *fptr, *vptr;
+
+ field = getDecodedObject(field);
value = getDecodedObject(value);
- o->ptr = zipmapSet(o->ptr,
- key->ptr,sdslen(key->ptr),
- value->ptr,sdslen(value->ptr), &update);
- decrRefCount(key);
+
+ zl = o->ptr;
+ fptr = ziplistIndex(zl, ZIPLIST_HEAD);
+ if (fptr != NULL) {
+ fptr = ziplistFind(fptr, field->ptr, sdslen(field->ptr), 1);
+ if (fptr != NULL) {
+ /* Grab pointer to the value (fptr points to the field) */
+ vptr = ziplistNext(zl, fptr);
+ redisAssert(vptr != NULL);
+ update = 1;
+
+ /* Delete value */
+ zl = ziplistDelete(zl, &vptr);
+
+ /* Insert new value */
+ zl = ziplistInsert(zl, vptr, value->ptr, sdslen(value->ptr));
+ }
+ }
+
+ if (!update) {
+ /* Push new field/value pair onto the tail of the ziplist */
+ zl = ziplistPush(zl, field->ptr, sdslen(field->ptr), ZIPLIST_TAIL);
+ zl = ziplistPush(zl, value->ptr, sdslen(value->ptr), ZIPLIST_TAIL);
+ }
+ o->ptr = zl;
+ decrRefCount(field);
decrRefCount(value);
- /* 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 {
- if (dictReplace(o->ptr,key,value)) {
- /* Insert */
- incrRefCount(key);
- } else {
- /* Update */
+ /* Check if the ziplist needs to be converted to a hash table */
+ if (hashTypeLength(o) > server.hash_max_ziplist_entries)
+ hashTypeConvert(o, REDIS_ENCODING_HT);
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ if (dictReplace(o->ptr, field, value)) { /* Insert */
+ incrRefCount(field);
+ } else { /* Update */
update = 1;
}
incrRefCount(value);
+ } else {
+ redisPanic("Unknown hash encoding");
}
return update;
}
/* Delete an element from a hash.
* Return 1 on deleted and 0 on not found. */
-int hashTypeDelete(robj *o, robj *key) {
+int hashTypeDelete(robj *o, robj *field) {
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);
+
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl, *fptr;
+
+ field = getDecodedObject(field);
+
+ zl = o->ptr;
+ fptr = ziplistIndex(zl, ZIPLIST_HEAD);
+ if (fptr != NULL) {
+ fptr = ziplistFind(fptr, field->ptr, sdslen(field->ptr), 1);
+ if (fptr != NULL) {
+ zl = ziplistDelete(zl,&fptr);
+ zl = ziplistDelete(zl,&fptr);
+ o->ptr = zl;
+ deleted = 1;
+ }
+ }
+
+ decrRefCount(field);
+
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ if (dictDelete((dict*)o->ptr, field) == REDIS_OK) {
+ deleted = 1;
+
+ /* Always check if the dictionary needs a resize after a delete. */
+ if (htNeedsResize(o->ptr)) dictResize(o->ptr);
+ }
+
} 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);
+ redisPanic("Unknown hash encoding");
}
+
return deleted;
}
/* Return the number of elements in a hash. */
unsigned long hashTypeLength(robj *o) {
- return (o->encoding == REDIS_ENCODING_ZIPMAP) ?
- zipmapLen((unsigned char*)o->ptr) : dictSize((dict*)o->ptr);
+ unsigned long length = ULONG_MAX;
+
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ length = ziplistLen(o->ptr) / 2;
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ length = dictSize((dict*)o->ptr);
+ } else {
+ redisPanic("Unknown hash encoding");
+ }
+
+ return length;
}
hashTypeIterator *hashTypeInitIterator(robj *subject) {
hashTypeIterator *hi = zmalloc(sizeof(hashTypeIterator));
+ hi->subject = subject;
hi->encoding = subject->encoding;
- if (hi->encoding == REDIS_ENCODING_ZIPMAP) {
- hi->zi = zipmapRewind(subject->ptr);
+
+ if (hi->encoding == REDIS_ENCODING_ZIPLIST) {
+ hi->fptr = NULL;
+ hi->vptr = NULL;
} else if (hi->encoding == REDIS_ENCODING_HT) {
hi->di = dictGetIterator(subject->ptr);
} else {
- redisAssert(NULL);
+ redisPanic("Unknown hash encoding");
}
+
return hi;
}
if (hi->encoding == REDIS_ENCODING_HT) {
dictReleaseIterator(hi->di);
}
+
zfree(hi);
}
/* 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. */
int hashTypeNext(hashTypeIterator *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->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl;
+ unsigned char *fptr, *vptr;
+
+ zl = hi->subject->ptr;
+ fptr = hi->fptr;
+ vptr = hi->vptr;
+
+ if (fptr == NULL) {
+ /* Initialize cursor */
+ redisAssert(vptr == NULL);
+ fptr = ziplistIndex(zl, 0);
+ } else {
+ /* Advance cursor */
+ redisAssert(vptr != NULL);
+ fptr = ziplistNext(zl, vptr);
+ }
+ if (fptr == NULL) return REDIS_ERR;
+
+ /* Grab pointer to the value (fptr points to the field) */
+ vptr = ziplistNext(zl, fptr);
+ redisAssert(vptr != NULL);
+
+ /* fptr, vptr now point to the first or next pair */
+ hi->fptr = fptr;
+ hi->vptr = vptr;
+ } else if (hi->encoding == REDIS_ENCODING_HT) {
if ((hi->de = dictNext(hi->di)) == NULL) return REDIS_ERR;
+ } else {
+ redisPanic("Unknown hash encoding");
}
return REDIS_OK;
}
-/* Get key or value object at current iteration position.
- * The returned item differs with the hash object encoding:
- * - When encoding is REDIS_ENCODING_HT, the objval pointer is populated
- * with the original object.
- * - When encoding is REDIS_ENCODING_ZIPMAP, a pointer to the string and
- * its length is retunred populating the v and vlen pointers.
- * This function is copy on write friendly as accessing objects in read only
- * does not require writing to any memory page.
- *
- * The function returns the encoding of the object, so that the caller
- * can underestand if the key or value was returned as object or C string. */
-int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen) {
- if (hi->encoding == REDIS_ENCODING_ZIPMAP) {
- if (what & REDIS_HASH_KEY) {
- *v = hi->zk;
- *vlen = hi->zklen;
- } else {
- *v = hi->zv;
- *vlen = hi->zvlen;
- }
+/* Get the field or value at iterator cursor, for an iterator on a hash value
+ * encoded as a ziplist. Prototype is similar to `hashTypeGetFromZiplist`. */
+void hashTypeCurrentFromZiplist(hashTypeIterator *hi, int what,
+ unsigned char **vstr,
+ unsigned int *vlen,
+ long long *vll)
+{
+ int ret;
+
+ redisAssert(hi->encoding == REDIS_ENCODING_ZIPLIST);
+
+ if (what & REDIS_HASH_KEY) {
+ ret = ziplistGet(hi->fptr, vstr, vlen, vll);
+ redisAssert(ret);
} else {
- if (what & REDIS_HASH_KEY)
- *objval = dictGetEntryKey(hi->de);
- else
- *objval = dictGetEntryVal(hi->de);
+ ret = ziplistGet(hi->vptr, vstr, vlen, vll);
+ redisAssert(ret);
}
- return hi->encoding;
}
-/* A non copy-on-write friendly but higher level version of hashTypeCurrent()
- * that always returns an object with refcount incremented by one (or a new
- * object), so it's up to the caller to decrRefCount() the object if no
- * reference is retained. */
+/* Get the field or value at iterator cursor, for an iterator on a hash value
+ * encoded as a ziplist. Prototype is similar to `hashTypeGetFromHashTable`. */
+void hashTypeCurrentFromHashTable(hashTypeIterator *hi, int what, robj **dst) {
+ redisAssert(hi->encoding == REDIS_ENCODING_HT);
+
+ if (what & REDIS_HASH_KEY) {
+ *dst = dictGetKey(hi->de);
+ } else {
+ *dst = dictGetVal(hi->de);
+ }
+}
+
+/* A non copy-on-write friendly but higher level version of hashTypeCurrent*()
+ * that returns an object with incremented refcount (or a new object). It is up
+ * to the caller to decrRefCount() the object if no reference is retained. */
robj *hashTypeCurrentObject(hashTypeIterator *hi, int what) {
- robj *obj;
- unsigned char *v = NULL;
- unsigned int vlen = 0;
- int encoding = hashTypeCurrent(hi,what,&obj,&v,&vlen);
-
- if (encoding == REDIS_ENCODING_HT) {
- incrRefCount(obj);
- return obj;
+ robj *dst;
+
+ if (hi->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr = NULL;
+ unsigned int vlen = UINT_MAX;
+ long long vll = LLONG_MAX;
+
+ hashTypeCurrentFromZiplist(hi, what, &vstr, &vlen, &vll);
+ if (vstr) {
+ dst = createStringObject((char*)vstr, vlen);
+ } else {
+ dst = createStringObjectFromLongLong(vll);
+ }
+
+ } else if (hi->encoding == REDIS_ENCODING_HT) {
+ hashTypeCurrentFromHashTable(hi, what, &dst);
+ incrRefCount(dst);
+
} else {
- return createStringObject((char*)v,vlen);
+ redisPanic("Unknown hash encoding");
}
+
+ return dst;
}
robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key) {
return o;
}
-void convertToRealHash(robj *o) {
- unsigned char *key, *val, *p, *zm = o->ptr;
- unsigned int klen, vlen;
- dict *dict = dictCreate(&hashDictType,NULL);
+void hashTypeConvertZiplist(robj *o, int enc) {
+ redisAssert(o->encoding == REDIS_ENCODING_ZIPLIST);
- redisAssert(o->type == REDIS_HASH && o->encoding != REDIS_ENCODING_HT);
- p = zipmapRewind(zm);
- while((p = zipmapNext(p,&key,&klen,&val,&vlen)) != NULL) {
- robj *keyobj, *valobj;
+ if (enc == REDIS_ENCODING_ZIPLIST) {
+ /* Nothing to do... */
- keyobj = createStringObject((char*)key,klen);
- valobj = createStringObject((char*)val,vlen);
- keyobj = tryObjectEncoding(keyobj);
- valobj = tryObjectEncoding(valobj);
- dictAdd(dict,keyobj,valobj);
+ } else if (enc == REDIS_ENCODING_HT) {
+ hashTypeIterator *hi;
+ dict *dict;
+ int ret;
+
+ hi = hashTypeInitIterator(o);
+ dict = dictCreate(&hashDictType, NULL);
+
+ while (hashTypeNext(hi) != REDIS_ERR) {
+ robj *field, *value;
+
+ field = hashTypeCurrentObject(hi, REDIS_HASH_KEY);
+ field = tryObjectEncoding(field);
+ value = hashTypeCurrentObject(hi, REDIS_HASH_VALUE);
+ value = tryObjectEncoding(value);
+ ret = dictAdd(dict, field, value);
+ redisAssert(ret == DICT_OK);
+ }
+
+ hashTypeReleaseIterator(hi);
+ zfree(o->ptr);
+
+ o->encoding = REDIS_ENCODING_HT;
+ o->ptr = dict;
+
+ } else {
+ redisPanic("Unknown hash encoding");
+ }
+}
+
+void hashTypeConvert(robj *o, int enc) {
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ hashTypeConvertZiplist(o, enc);
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ redisPanic("Not implemented");
+ } else {
+ redisPanic("Unknown hash encoding");
}
- o->encoding = REDIS_ENCODING_HT;
- o->ptr = dict;
- zfree(zm);
}
/*-----------------------------------------------------------------------------
}
void hincrbyCommand(redisClient *c) {
- long long value, incr;
+ long long value, incr, oldvalue;
robj *o, *current, *new;
if (getLongLongFromObjectOrReply(c,c->argv[3],&incr,NULL) != REDIS_OK) return;
value = 0;
}
+ oldvalue = value;
+ if ((incr < 0 && oldvalue < 0 && incr < (LLONG_MIN-oldvalue)) ||
+ (incr > 0 && oldvalue > 0 && incr > (LLONG_MAX-oldvalue))) {
+ addReplyError(c,"increment or decrement would overflow");
+ return;
+ }
value += incr;
new = createStringObjectFromLongLong(value);
hashTypeTryObjectEncoding(o,&c->argv[2],NULL);
server.dirty++;
}
+void hincrbyfloatCommand(redisClient *c) {
+ double long value, incr;
+ robj *o, *current, *new, *aux;
+
+ if (getLongDoubleFromObjectOrReply(c,c->argv[3],&incr,NULL) != REDIS_OK) return;
+ if ((o = hashTypeLookupWriteOrCreate(c,c->argv[1])) == NULL) return;
+ if ((current = hashTypeGetObject(o,c->argv[2])) != NULL) {
+ if (getLongDoubleFromObjectOrReply(c,current,&value,
+ "hash value is not a valid float") != REDIS_OK) {
+ decrRefCount(current);
+ return;
+ }
+ decrRefCount(current);
+ } else {
+ value = 0;
+ }
+
+ value += incr;
+ new = createStringObjectFromLongDouble(value);
+ hashTypeTryObjectEncoding(o,&c->argv[2],NULL);
+ hashTypeSet(o,c->argv[2],new);
+ addReplyBulk(c,new);
+ signalModifiedKey(c->db,c->argv[1]);
+ server.dirty++;
+
+ /* Always replicate HINCRBYFLOAT as an HSET command with the final value
+ * in order to make sure that differences in float pricision or formatting
+ * will not create differences in replicas or after an AOF restart. */
+ aux = createStringObject("HSET",4);
+ rewriteClientCommandArgument(c,0,aux);
+ decrRefCount(aux);
+ rewriteClientCommandArgument(c,3,new);
+ decrRefCount(new);
+}
+
+static void addHashFieldToReply(redisClient *c, robj *o, robj *field) {
+ int ret;
+
+ if (o == NULL) {
+ addReply(c, shared.nullbulk);
+ return;
+ }
+
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr = NULL;
+ unsigned int vlen = UINT_MAX;
+ long long vll = LLONG_MAX;
+
+ ret = hashTypeGetFromZiplist(o, field, &vstr, &vlen, &vll);
+ if (ret < 0) {
+ addReply(c, shared.nullbulk);
+ } else {
+ if (vstr) {
+ addReplyBulkCBuffer(c, vstr, vlen);
+ } else {
+ addReplyBulkLongLong(c, vll);
+ }
+ }
+
+ } else if (o->encoding == REDIS_ENCODING_HT) {
+ robj *value;
+
+ ret = hashTypeGetFromHashTable(o, field, &value);
+ if (ret < 0) {
+ addReply(c, shared.nullbulk);
+ } else {
+ addReplyBulk(c, value);
+ }
+
+ } else {
+ redisPanic("Unknown hash encoding");
+ }
+}
+
void hgetCommand(redisClient *c) {
- robj *o, *value;
- unsigned char *v;
- unsigned int vlen;
- int encoding;
+ robj *o;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
checkType(c,o,REDIS_HASH)) return;
- if ((encoding = hashTypeGet(o,c->argv[2],&value,&v,&vlen)) != -1) {
- if (encoding == REDIS_ENCODING_HT)
- addReplyBulk(c,value);
- else
- addReplyBulkCBuffer(c,v,vlen);
- } else {
- addReply(c,shared.nullbulk);
- }
+ addHashFieldToReply(c, o, c->argv[2]);
}
void hmgetCommand(redisClient *c) {
- int i, encoding;
- robj *o, *value;
- unsigned char *v;
- unsigned int vlen;
+ robj *o;
+ int i;
- o = lookupKeyRead(c->db,c->argv[1]);
+ /* Don't abort when the key cannot be found. Non-existing keys are empty
+ * hashes, where HMGET should respond with a series of null bulks. */
+ o = lookupKeyRead(c->db, c->argv[1]);
if (o != NULL && o->type != REDIS_HASH) {
- addReply(c,shared.wrongtypeerr);
+ addReply(c, shared.wrongtypeerr);
return;
}
- /* 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. */
- addReplyMultiBulkLen(c,c->argc-2);
+ addReplyMultiBulkLen(c, c->argc-2);
for (i = 2; i < c->argc; i++) {
- if (o != NULL &&
- (encoding = hashTypeGet(o,c->argv[i],&value,&v,&vlen)) != -1) {
- if (encoding == REDIS_ENCODING_HT)
- addReplyBulk(c,value);
- else
- addReplyBulkCBuffer(c,v,vlen);
- } else {
- addReply(c,shared.nullbulk);
- }
+ addHashFieldToReply(c, o, c->argv[i]);
}
}
void hdelCommand(redisClient *c) {
robj *o;
+ int j, deleted = 0;
+
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,o,REDIS_HASH)) return;
- if (hashTypeDelete(o,c->argv[2])) {
- if (hashTypeLength(o) == 0) dbDelete(c->db,c->argv[1]);
- addReply(c,shared.cone);
+ for (j = 2; j < c->argc; j++) {
+ if (hashTypeDelete(o,c->argv[j])) {
+ deleted++;
+ if (hashTypeLength(o) == 0) {
+ dbDelete(c->db,c->argv[1]);
+ break;
+ }
+ }
+ }
+ if (deleted) {
signalModifiedKey(c->db,c->argv[1]);
- server.dirty++;
- } else {
- addReply(c,shared.czero);
+ server.dirty += deleted;
}
+ addReplyLongLong(c,deleted);
}
void hlenCommand(redisClient *c) {
addReplyLongLong(c,hashTypeLength(o));
}
+static void addHashIteratorCursorToReply(redisClient *c, hashTypeIterator *hi, int what) {
+ if (hi->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr = NULL;
+ unsigned int vlen = UINT_MAX;
+ long long vll = LLONG_MAX;
+
+ hashTypeCurrentFromZiplist(hi, what, &vstr, &vlen, &vll);
+ if (vstr) {
+ addReplyBulkCBuffer(c, vstr, vlen);
+ } else {
+ addReplyBulkLongLong(c, vll);
+ }
+
+ } else if (hi->encoding == REDIS_ENCODING_HT) {
+ robj *value;
+
+ hashTypeCurrentFromHashTable(hi, what, &value);
+ addReplyBulk(c, value);
+
+ } else {
+ redisPanic("Unknown hash encoding");
+ }
+}
+
void genericHgetallCommand(redisClient *c, int flags) {
robj *o;
- unsigned long count = 0;
hashTypeIterator *hi;
- void *replylen = NULL;
+ int multiplier = 0;
+ int length, count = 0;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
|| checkType(c,o,REDIS_HASH)) return;
- replylen = addDeferredMultiBulkLength(c);
+ if (flags & REDIS_HASH_KEY) multiplier++;
+ if (flags & REDIS_HASH_VALUE) multiplier++;
+
+ length = hashTypeLength(o) * multiplier;
+ addReplyMultiBulkLen(c, length);
+
hi = hashTypeInitIterator(o);
while (hashTypeNext(hi) != REDIS_ERR) {
- robj *obj;
- unsigned char *v = NULL;
- unsigned int vlen = 0;
- int encoding;
-
if (flags & REDIS_HASH_KEY) {
- encoding = hashTypeCurrent(hi,REDIS_HASH_KEY,&obj,&v,&vlen);
- if (encoding == REDIS_ENCODING_HT)
- addReplyBulk(c,obj);
- else
- addReplyBulkCBuffer(c,v,vlen);
+ addHashIteratorCursorToReply(c, hi, REDIS_HASH_KEY);
count++;
}
if (flags & REDIS_HASH_VALUE) {
- encoding = hashTypeCurrent(hi,REDIS_HASH_VALUE,&obj,&v,&vlen);
- if (encoding == REDIS_ENCODING_HT)
- addReplyBulk(c,obj);
- else
- addReplyBulkCBuffer(c,v,vlen);
+ addHashIteratorCursorToReply(c, hi, REDIS_HASH_VALUE);
count++;
}
}
+
hashTypeReleaseIterator(hi);
- setDeferredMultiBulkLength(c,replylen,count);
+ redisAssert(count == length);
}
void hkeysCommand(redisClient *c) {
projects / redis.git / blobdiff