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Feat: Add HStrlen Command.

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This commit is contained in:
Eriri
2022-05-31 20:13:33 +08:00
committed by finley
parent 951a844439
commit bde2c8ccbe
5 changed files with 31 additions and 4 deletions
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23
database/hash.go
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@@ -187,6 +187,28 @@ func execHLen(db *DB, args [][]byte) redis.Reply {
return protocol.MakeIntReply(int64(dict.Len()))
}
// execHStrlen Returns the string length of the value associated with field in the hash stored at key.
// If the key or the field do not exist, 0 is returned.
func execHStrlen(db *DB, args [][]byte) redis.Reply {
key := string(args[0])
field := string(args[1])
dict, errReply := db.getAsDict(key)
if errReply != nil {
return errReply
}
if dict == nil {
return protocol.MakeIntReply(0)
}
raw, exists := dict.Get(field)
if exists {
value, _ := raw.([]byte)
return protocol.MakeIntReply(int64(len(value)))
}
return protocol.MakeIntReply(0)
}
// execHMSet sets multi fields in hash table
func execHMSet(db *DB, args [][]byte) redis.Reply {
// parse args
@@ -482,6 +504,7 @@ func init() {
RegisterCommand("HExists", execHExists, readFirstKey, nil, 3)
RegisterCommand("HDel", execHDel, writeFirstKey, undoHDel, -3)
RegisterCommand("HLen", execHLen, readFirstKey, nil, 2)
RegisterCommand("HStrlen", execHStrlen, readFirstKey, nil, 3)
RegisterCommand("HMSet", execHMSet, writeFirstKey, undoHMSet, -4)
RegisterCommand("HMGet", execHMGet, readFirstKey, nil, -3)
RegisterCommand("HGet", execHGet, readFirstKey, nil, -3)