func encUUID(v interface{}) (driver.Value, error) {
var u uuid.UUID
switch v := v.(type) {
case string:
var err error
u, err = uuid.ParseUUID(v)
if err != nil {
return nil, err
}
case []byte:
u = uuid.FromBytes(v)
case uuid.UUID:
u = v
default:
return nil, fmt.Errorf("can not convert %T to a UUID", v)
}
return u.Bytes(), nil
}
func decode(b []byte, t []uint16) driver.Value {
switch t[0] {
case typeBool:
if len(b) >= 1 && b[0] != 0 {
return true
}
return false
case typeBlob:
return b
case typeVarchar, typeText, typeAscii:
return b
case typeInt:
return int64(int32(binary.BigEndian.Uint32(b)))
case typeBigInt:
return int64(binary.BigEndian.Uint64(b))
case typeFloat:
return float64(math.Float32frombits(binary.BigEndian.Uint32(b)))
case typeDouble:
return math.Float64frombits(binary.BigEndian.Uint64(b))
case typeTimestamp:
t := int64(binary.BigEndian.Uint64(b))
sec := t / 1000
nsec := (t - sec*1000) * 1000000
return time.Unix(sec, nsec)
case typeUUID, typeTimeUUID:
return uuid.FromBytes(b)
case typeMap:
// A Map is stored as the number of tuples followed by the sequence of tuples.
// Each name and value are stored as a byte count followed by the raw bytes.
//
// Example:
// 0 23 - 0 3 - 1 2 3 - 0 1 - 66 .... repeats
//
// In this example, there are 23 tuples. The first tuple's name has 3 bytes,
// which are 1, 2, and 3, and the tuple's value has 1 byte, which is 66.
//
// It only supports map[string][string] right now.
if t[1] == typeVarchar && t[2] == typeVarchar {
// Read the number of tuples
collLen := int(binary.BigEndian.Uint16(b[:2]))
coll := make(map[string]string, collLen)
for pairNum, bpointer := 0, 2; pairNum < collLen; pairNum++ {
// Read the byte count for the tuple's name
keyLen := int(binary.BigEndian.Uint16(b[bpointer : bpointer+2]))
bpointer += 2
// Read the tuple's name according to the byte count
key := string(b[bpointer : bpointer+keyLen])
bpointer += keyLen
// Read the byte count for the tuple's value
valueLen := int(binary.BigEndian.Uint16(b[bpointer : bpointer+2]))
bpointer += 2
// Read the tuple's value according to the byte count
value := string(b[bpointer : bpointer+valueLen])
bpointer += valueLen
coll[key] = value
}
return coll
} else {
panic("unsupported map collection type")
}
default:
panic("unsupported type")
}
return b
}