func Hincrbyfloat(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 float64
if res != nil {
current, err = bconv.ParseFloat(res, 64)
if err != nil {
return fmt.Errorf("hash value is not a valid float")
}
}
increment, err := bconv.ParseFloat(args[2], 64)
if err != nil {
return fmt.Errorf("value is not a valid float")
}
result := strconv.AppendFloat(nil, current+increment, 'f', -1, 64)
wb.Put(key, result)
// if is a new key, increment the hash length
if res == nil {
setHlen(mk, length+1, wb)
}
return result
}
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
}
func zadd(args [][]byte, wb *levigo.WriteBatch, incr bool) interface{} {
var newMembers uint32
var score float64
scoreBytes := make([]byte, 8)
setKey := NewKeyBuffer(ZSetKey, args[0], len(args[2]))
scoreKey := NewKeyBuffer(ZScoreKey, args[0], 8+len(args[2]))
mk := metaKey(args[0])
card, err := zcard(mk, nil)
if err != nil {
return err
}
// Iterate through each of the score/member pairs
for i := 1; i < len(args); i += 2 {
var err error
score, err = bconv.ParseFloat(args[i], 64)
if err != nil {
return fmt.Errorf("'%s' is not a valid float", string(args[1]))
}
// Check if the member exists
setKey.SetSuffix(args[i+1])
var res []byte
if card > 0 {
res, err = DB.Get(DefaultReadOptions, setKey.Key())
if err != nil {
return err
}
}
// set the score key with 8 empty bytes before the member for the score
setZScoreKeyMember(scoreKey, args[i+1])
if res != nil { // We got a score from the db, so the member already exists
if len(res) != 8 {
return InvalidDataError
}
actualScore := math.Float64frombits(binary.BigEndian.Uint64(res))
if incr { // this is a ZINCRBY, so increment the score
score += actualScore
}
if score == actualScore { // Member already exists with the same score, do nothing
continue
}
// Delete score key for member
setZScoreKeyScore(scoreKey, actualScore)
wb.Delete(scoreKey.Key())
} else { // No score found, we're adding a new member
newMembers++
}
// Store the set and score keys
binary.BigEndian.PutUint64(scoreBytes, math.Float64bits(score))
setZScoreKeyScore(scoreKey, score)
wb.Put(setKey.Key(), scoreBytes)
wb.Put(scoreKey.Key(), []byte{}) // The score key is only used for sorting, the value is empty
}
// Update the set metadata with the new cardinality
if newMembers > 0 {
setZcard(mk, card+newMembers, wb)
}
if incr { // This is a ZINCRBY, return the new score
return ftoa(score)
}
return newMembers
}
func combineZset(args [][]byte, op int, wb *levigo.WriteBatch) interface{} {
var count uint32
res := []interface{}{}
members := make(chan *iterZsetMember)
var setKey, scoreKey *KeyBuffer
scoreBytes := make([]byte, 8)
mk := metaKey(args[0])
if wb != nil {
_, err := delKey(mk, wb)
if err != nil {
return err
}
setKey = NewKeyBuffer(ZSetKey, args[0], 0)
scoreKey = NewKeyBuffer(ZScoreKey, args[0], 0)
}
numKeys, err := bconv.Atoi(args[1])
if err != nil {
return InvalidIntError
}
aggregate := zsetAggSum
weights := make([]float64, numKeys)
scores := make([]float64, 0, numKeys)
for i := 0; i < numKeys; i++ {
weights[i] = 1
}
argOffset := 2 + numKeys
if len(args) > argOffset {
if len(args) > argOffset+numKeys {
if EqualIgnoreCase(args[argOffset], []byte("weights")) {
argOffset += numKeys + 1
for i, w := range args[numKeys+3 : argOffset] {
weights[i], err = bconv.ParseFloat(w, 64)
if err != nil {
return fmt.Errorf("weight value is not a float")
}
}
} else {
return SyntaxError
}
}
if len(args) > argOffset {
if len(args) == argOffset+2 && EqualIgnoreCase(args[argOffset], []byte("aggregate")) {
agg := bytes.ToLower(args[argOffset+1])
switch {
case bytes.Equal(agg, []byte("sum")):
aggregate = zsetAggSum
case bytes.Equal(agg, []byte("min")):
aggregate = zsetAggMin
case bytes.Equal(agg, []byte("max")):
aggregate = zsetAggMax
default:
return SyntaxError
}
} else {
return SyntaxError
}
}
}
go multiZsetIter(args[2:numKeys+2], members, op != zsetUnion)
combine:
for m := range members {
if op == zsetInter {
for _, k := range m.exists {
if !k {
continue combine
}
}
}
scores = scores[:0]
for i, k := range m.exists {
if k {
scores = append(scores, m.scores[i])
}
}
var score float64
for i, s := range scores {
scores[i] = s * weights[i]
}
switch aggregate {
case zsetAggSum:
for _, s := range scores {
score += s
}
case zsetAggMin:
sort.Float64s(scores)
score = scores[0]
case zsetAggMax:
sort.Float64s(scores)
score = scores[len(scores)-1]
}
if wb != nil {
setKey.SetSuffix(m.member)
binary.BigEndian.PutUint64(scoreBytes, math.Float64bits(score))
setZScoreKeyMember(scoreKey, m.member)
setZScoreKeyScore(scoreKey, score)
wb.Put(setKey.Key(), scoreBytes)
wb.Put(scoreKey.Key(), []byte{})
count++
} else {
res = append(res, m.member, ftoa(score))
}
}
if wb != nil {
if count > 0 {
setZcard(mk, count, wb)
}
return count
}
return res
}