change the type of return score

ledis/t_zset.go

@@ -8,8 +8,9 @@ import (
 )
 
 const (
-	MinScore int64 = -1<<63 + 1
-	MaxScore int64 = 1<<63 - 1
+	MinScore     int64 = -1<<63 + 1
+	MaxScore     int64 = 1<<63 - 1
+	InvalidScore int64 = -1 << 63
 )
 
 type ScorePair struct {
@@ -21,6 +22,7 @@ var errZSizeKey = errors.New("invalid zsize key")
 var errZSetKey = errors.New("invalid zset key")
 var errZScoreKey = errors.New("invalid zscore key")
 var errScoreOverflow = errors.New("zset score overflow")
+var errScoreMiss = errors.New("zset score miss")
 
 const (
 	zsetNScoreSep    byte = '<'
@@ -311,19 +313,25 @@ func (db *DB) ZCard(key []byte) (int64, error) {
 	return Int64(db.db.Get(sk))
 }
 
-func (db *DB) ZScore(key []byte, member []byte) ([]byte, error) {
+func (db *DB) ZScore(key []byte, member []byte) (int64, error) {
 	if err := checkZSetKMSize(key, member); err != nil {
-		return nil, err
+		return InvalidScore, err
 	}
 
+	var score int64 = InvalidScore
+
 	k := db.zEncodeSetKey(key, member)
-
-	score, err := Int64(db.db.Get(k))
-	if err != nil {
-		return nil, err
+	if v, err := db.db.Get(k); err != nil {
+		return InvalidScore, err
+	} else if v == nil {
+		return InvalidScore, errScoreMiss
+	} else {
+		if score, err = Int64(v, nil); err != nil {
+			return InvalidScore, err
+		}
 	}
 
-	return StrPutInt64(score), nil
+	return score, nil
 }
 
 func (db *DB) ZRem(key []byte, members ...[]byte) (int64, error) {
@@ -356,9 +364,9 @@ func (db *DB) ZRem(key []byte, members ...[]byte) (int64, error) {
 	return num, err
 }
 
-func (db *DB) ZIncrBy(key []byte, delta int64, member []byte) ([]byte, error) {
+func (db *DB) ZIncrBy(key []byte, delta int64, member []byte) (int64, error) {
 	if err := checkZSetKMSize(key, member); err != nil {
-		return nil, err
+		return InvalidScore, err
 	}
 
 	t := db.zsetTx
@@ -371,18 +379,17 @@ func (db *DB) ZIncrBy(key []byte, delta int64, member []byte) ([]byte, error) {
 
 	v, err := db.db.Get(ek)
 	if err != nil {
-		return nil, err
+		return InvalidScore, err
 	} else if v != nil {
 		if s, err := Int64(v, err); err != nil {
-			return nil, err
+			return InvalidScore, err
 		} else {
 			sk := db.zEncodeScoreKey(key, member, s)
 			t.Delete(sk)
 
 			score = s + delta
-
 			if score >= MaxScore || score <= MinScore {
-				return nil, errScoreOverflow
+				return InvalidScore, errScoreOverflow
 			}
 		}
 	} else {
@@ -395,7 +402,7 @@ func (db *DB) ZIncrBy(key []byte, delta int64, member []byte) ([]byte, error) {
 	t.Put(sk, []byte{})
 
 	err = t.Commit()
-	return StrPutInt64(score), err
+	return score, err
 }
 
 func (db *DB) ZCount(key []byte, min int64, max int64) (int64, error) {
@@ -563,10 +570,10 @@ func (db *DB) zRange(key []byte, min int64, max int64, withScores bool, offset i
 			continue
 		}
 
-		v = append(v, m)
-
 		if withScores {
-			v = append(v, StrPutInt64(s))
+			v = append(v, m, s)
+		} else {
+			v = append(v, m)
 		}
 	}
 

ledis/t_zset_test.go

@@ -71,6 +71,16 @@ func TestDBZSet(t *testing.T) {
 		t.Fatal(n)
 	}
 
+	if s, err := db.ZScore(key, bin("d")); err != nil {
+		t.Fatal(err)
+	} else if s != 3 {
+		t.Fatal(s)
+	}
+
+	if s, err := db.ZScore(key, bin("zzz")); err != errScoreMiss || s != InvalidScore {
+		t.Fatal(fmt.Sprintf("s=[%d] err=[%s]", s, err))
+	}
+
 	// {c':2, 'd':3}
 	if n, err := db.ZRem(key, bin("a"), bin("b")); err != nil {
 		t.Fatal(err)
@@ -179,8 +189,10 @@ func TestZSetOrder(t *testing.T) {
 	}
 
 	// {'a':0, 'b':1, 'c':2, 'd':999, 'e':6, 'f':5}
-	if _, err := db.ZIncrBy(key, 2, bin("e")); err != nil {
+	if s, err := db.ZIncrBy(key, 2, bin("e")); err != nil {
 		t.Fatal(err)
+	} else if s != 6 {
+		t.Fatal(s)
 	}
 
 	if pos, _ := db.ZRank(key, bin("e")); int(pos) != 4 {
@@ -190,6 +202,19 @@ func TestZSetOrder(t *testing.T) {
 	if pos, _ := db.ZRevRank(key, bin("e")); int(pos) != 1 {
 		t.Fatal(pos)
 	}
+
+	if datas, _ := db.ZRange(key, 0, endPos, true); len(datas) != 12 {
+		t.Fatal(len(datas))
+	} else {
+		scores := []int64{0, 1, 2, 5, 6, 999}
+		for i := 1; i < len(datas); i += 2 {
+			if s, ok := datas[i].(int64); !ok || s != scores[(i-1)/2] {
+				t.Fatal(fmt.Sprintf("[%d]=%d", i, datas[i]))
+			}
+		}
+	}
+
+	return
 }
 
 func TestDBZScan(t *testing.T) {

server/cmd_zset.go

@@ -66,10 +66,10 @@ func zscoreCommand(c *client) error {
 		return ErrCmdParams
 	}
 
-	if v, err := c.db.ZScore(args[0], args[1]); err != nil {
+	if s, err := c.db.ZScore(args[0], args[1]); err != nil {
 		return err
 	} else {
-		c.writeBulk(v)
+		c.writeInteger(s)
 	}
 
 	return nil