101 lines
1.9 KiB
Go
101 lines
1.9 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package keys
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import (
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"encoding/binary"
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"io"
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"math"
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"reflect"
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"time"
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"unsafe"
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)
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type writer struct {
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io.Writer
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}
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func newWriter(w io.Writer) *writer {
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return &writer{
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w,
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}
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}
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func (w *writer) write(i interface{}) {
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switch v := i.(type) {
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case []byte:
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w.Write(v)
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case string:
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w.writeStr(v)
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case time.Time:
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w.writeTme(v)
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case uint:
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w.writeNum(float64(v))
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case uint8:
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w.writeNum(float64(v))
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case uint16:
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w.writeNum(float64(v))
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case uint32:
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w.writeNum(float64(v))
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case uint64:
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w.writeNum(float64(v))
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case int:
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w.writeNum(float64(v))
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case int8:
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w.writeNum(float64(v))
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case int16:
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w.writeNum(float64(v))
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case int32:
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w.writeNum(float64(v))
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case int64:
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w.writeNum(float64(v))
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case float32:
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w.writeNum(float64(v))
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case float64:
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w.writeNum(float64(v))
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}
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}
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func (w *writer) writeStr(v string) {
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b := *(*[]byte)(unsafe.Pointer((*reflect.SliceHeader)(unsafe.Pointer(&v))))
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w.Write(b)
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}
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func (w *writer) writeTme(v time.Time) {
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b := make([]byte, 8)
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binary.BigEndian.PutUint64(b, uint64(v.UTC().UnixNano()))
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w.Write(b)
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}
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func (w *writer) writeNum(v float64) {
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b := make([]byte, 8)
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if v < 0 {
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w.Write(bNEG)
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binary.BigEndian.PutUint64(b, ^math.Float64bits(v))
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} else {
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w.Write(bPOS)
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binary.BigEndian.PutUint64(b, math.Float64bits(v))
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}
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w.Write(b)
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}
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