func Hincrby(args [][]byte, wb *levigo.WriteBatch) interface{} {
mk := metaKey(args[0])
length, err := hlen(mk, nil)
if err != nil {
return err
}
key := NewKeyBufferWithSuffix(HashKey, args[0], args[1]).Key()
res, err := DB.Get(DefaultReadOptions, key)
if err != nil {
return err
}
var current int64
if res != nil {
current, err = bconv.ParseInt(res, 10, 64)
if err != nil {
return InvalidIntError
}
}
increment, err := bconv.ParseInt(args[2], 10, 64)
if err != nil {
return InvalidIntError
}
result := strconv.AppendInt(nil, current+increment, 10)
wb.Put(key, result)
// if is a new key, increment the hash length
if res == nil {
setHlen(mk, length+1, wb)
}
return result
}
func Restore(args [][]byte, wb *levigo.WriteBatch) interface{} {
ttl, err := bconv.ParseInt(args[1], 10, 64)
if err != nil {
return InvalidIntError
}
err = rdb.DecodeDump(args[2], 0, args[0], ttl, &rdbDecoder{wb: wb})
if err != nil {
return err
}
return ReplyOK
}
func parseRange(args [][]byte, length int64) (int64, int64, error) {
start, err := bconv.ParseInt(args[0], 10, 64)
end, err2 := bconv.ParseInt(args[1], 10, 64)
if err != nil || err2 != nil {
return 0, 0, InvalidIntError
}
// if the index is negative, it is counting from the end,
// so add it to the length to get the absolute index
if start < 0 {
start += length
}
if end < 0 {
end += length
}
if end > length { // limit the end to the last member
end = length - 1
}
return start, end, nil
}
func Migrate(args [][]byte, wb *levigo.WriteBatch) interface{} {
timeout, err := bconv.ParseInt(args[4], 10, 64)
if err != nil {
return InvalidIntError
}
data, err := dumpKey(args[2])
if err != nil {
return err
}
if data == nil {
return ReplyNOKEY
}
t := time.Duration(timeout) * time.Millisecond
r, err := redis.DialTimeout("tcp", string(args[0])+":"+string(args[1]), t, t, t)
defer r.Close()
if err != nil {
return IOError{fmt.Errorf("error or timeout connecting to target instance")}
}
res, err := redis.String(r.Do("SELECT", args[3]))
if _, ok := err.(redis.Error); ok {
return fmt.Errorf("Target instance replied with error: %s", err)
}
if err != nil || res != "OK" {
return IOError{fmt.Errorf("error or timeout performing SELECT of database %s on target instance", args[3])}
}
res, err = redis.String(r.Do("RESTORE", args[2], "0", data))
if _, ok := err.(redis.Error); ok {
return fmt.Errorf("Target instance replied with error: %s", err)
}
if err != nil || res != "OK" {
return IOError{fmt.Errorf("error or timeout performing RESTORE of key on target instance")}
}
_, err = delKey(metaKey(args[2]), wb)
if err != nil {
return IOError{fmt.Errorf("error deleting key from local instance: %s", err)}
}
return ReplyOK
}
func zrangebyscore(args [][]byte, flag zrangeFlag, wb *levigo.WriteBatch) interface{} {
// use a snapshot for this read so that the zcard is consistent
snapshot := DB.NewSnapshot()
opts := levigo.NewReadOptions()
opts.SetSnapshot(snapshot)
defer opts.Close()
defer DB.ReleaseSnapshot(snapshot)
mk := metaKey(args[0])
card, err := zcard(mk, opts)
if err != nil {
return err
}
var minExclusive, maxExclusive bool
if args[1][0] == '(' {
minExclusive = true
args[1] = args[1][1:]
}
if args[2][0] == '(' {
maxExclusive = true
args[2] = args[2][1:]
}
min, err := bconv.ParseFloat(args[1], 64)
max, err2 := bconv.ParseFloat(args[2], 64)
if err != nil || err2 != nil {
return fmt.Errorf("min or max is not a float")
}
if flag == zrangeReverse {
min, max = max, min
minExclusive, maxExclusive = maxExclusive, minExclusive
}
if card == 0 || min > max {
if flag <= zrangeReverse {
return []interface{}{}
} else {
return 0
}
}
// shortcut for zcount of -Inf to +Inf
if flag == zrangeCount && math.IsInf(min, -1) && math.IsInf(max, 1) {
return card
}
var withscores bool
var offset, total int64 = 0, -1
if flag <= zrangeReverse && len(args) > 3 {
if len(args) == 4 || len(args) == 7 {
if EqualIgnoreCase(args[3], []byte("withscores")) {
withscores = true
}
} else if len(args) != 6 {
return SyntaxError
}
if len(args) >= 6 {
if EqualIgnoreCase(args[len(args)-3], []byte("limit")) {
offset, err = bconv.ParseInt(args[len(args)-2], 10, 64)
total, err2 = bconv.ParseInt(args[len(args)-1], 10, 64)
if err != nil || err2 != nil {
return InvalidIntError
}
if offset < 0 || total < 1 {
return []interface{}{}
}
} else {
return SyntaxError
}
}
}
it := DB.NewIterator(opts)
defer it.Close()
var deleted, count uint32
var deleteKey *KeyBuffer
if flag == zrangeDelete {
deleteKey = NewKeyBuffer(ZSetKey, args[0], 0)
}
res := []interface{}{}
iterKey := NewKeyBuffer(ZScoreKey, args[0], 8)
if flag != zrangeReverse {
setZScoreKeyScore(iterKey, min)
} else {
setZScoreKeyScore(iterKey, max)
iterKey.ReverseIterKey()
}
it.Seek(iterKey.Key())
for i := int64(0); it.Valid(); i++ {
if flag == zrangeReverse {
it.Prev()
}
if i >= offset {
if total > -1 && i-offset >= total {
break
}
k := it.Key()
if !iterKey.IsPrefixOf(k) {
break
}
score, member := parseZScoreKey(it.Key(), len(args[0]))
if (!minExclusive && score < min) || (minExclusive && score <= min) {
if flag != zrangeReverse {
it.Next()
}
continue
}
if (!maxExclusive && score > max) || (maxExclusive && score >= max) {
break
}
if flag <= zrangeReverse {
res = append(res, member)
if withscores {
res = append(res, ftoa(score))
}
}
if flag == zrangeDelete {
deleteKey.SetSuffix(member)
wb.Delete(k)
wb.Delete(deleteKey.Key())
deleted++
}
if flag == zrangeCount {
count++
}
}
if flag != zrangeReverse {
it.Next()
}
}
if flag == zrangeDelete && deleted == card {
wb.Delete(mk)
} else if deleted > 0 {
setZcard(mk, card-deleted, wb)
}
if flag == zrangeDelete {
return deleted
}
if flag == zrangeCount {
return count
}
return res
}