529ddbbec2
All numbers in encoded keys are now encoded into float64, ensuring that decimal numbers are sorted alongside integers. The maximum number able to be stored as a float64, without losing precision, is now (1<<53 - 1) - the same maximum number possible in javascript.
131 lines
2.7 KiB
Go
131 lines
2.7 KiB
Go
// Copyright © 2016 Abcum Ltd
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package keys
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"io"
|
|
"time"
|
|
)
|
|
|
|
type writer struct {
|
|
io.Writer
|
|
}
|
|
|
|
func newWriter(w io.Writer) *writer {
|
|
return &writer{
|
|
w,
|
|
}
|
|
}
|
|
|
|
func (w *writer) Write(i interface{}) {
|
|
|
|
switch v := i.(type) {
|
|
|
|
case []byte:
|
|
w.Writer.Write(v)
|
|
|
|
case string:
|
|
w.Writer.Write([]byte(v))
|
|
|
|
case time.Time:
|
|
binary.Write(w.Writer, binary.BigEndian, v.UnixNano())
|
|
|
|
case uint:
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
|
|
case uint8:
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
|
|
case uint16:
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
|
|
case uint32:
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
|
|
case uint64:
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
|
|
case int:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
case int8:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
case int16:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
case int32:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
case int64:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
case float32:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
case float64:
|
|
if v < 0 {
|
|
w.Write(bNILL)
|
|
binary.Write(w.Writer, binary.BigEndian, 0-float64(v))
|
|
} else {
|
|
w.Write(bBOOL)
|
|
binary.Write(w.Writer, binary.BigEndian, float64(v))
|
|
}
|
|
|
|
}
|
|
|
|
}
|