/
gbinary_le.go
287 lines (251 loc) · 6.2 KB
/
gbinary_le.go
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// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gbinary
import (
"bytes"
"context"
"encoding/binary"
"fmt"
"math"
"github.com/gogf/gf/v2/errors/gerror"
"github.com/gogf/gf/v2/internal/intlog"
)
// LeEncode encodes one or multiple `values` into bytes using LittleEndian.
// It uses type asserting checking the type of each value of `values` and internally
// calls corresponding converting function do the bytes converting.
//
// It supports common variable type asserting, and finally it uses fmt.Sprintf converting
// value to string and then to bytes.
func LeEncode(values ...interface{}) []byte {
buf := new(bytes.Buffer)
for i := 0; i < len(values); i++ {
if values[i] == nil {
return buf.Bytes()
}
switch value := values[i].(type) {
case int:
buf.Write(LeEncodeInt(value))
case int8:
buf.Write(LeEncodeInt8(value))
case int16:
buf.Write(LeEncodeInt16(value))
case int32:
buf.Write(LeEncodeInt32(value))
case int64:
buf.Write(LeEncodeInt64(value))
case uint:
buf.Write(LeEncodeUint(value))
case uint8:
buf.Write(LeEncodeUint8(value))
case uint16:
buf.Write(LeEncodeUint16(value))
case uint32:
buf.Write(LeEncodeUint32(value))
case uint64:
buf.Write(LeEncodeUint64(value))
case bool:
buf.Write(LeEncodeBool(value))
case string:
buf.Write(LeEncodeString(value))
case []byte:
buf.Write(value)
case float32:
buf.Write(LeEncodeFloat32(value))
case float64:
buf.Write(LeEncodeFloat64(value))
default:
if err := binary.Write(buf, binary.LittleEndian, value); err != nil {
intlog.Errorf(context.TODO(), `%+v`, err)
buf.Write(LeEncodeString(fmt.Sprintf("%v", value)))
}
}
}
return buf.Bytes()
}
func LeEncodeByLength(length int, values ...interface{}) []byte {
b := LeEncode(values...)
if len(b) < length {
b = append(b, make([]byte, length-len(b))...)
} else if len(b) > length {
b = b[0:length]
}
return b
}
func LeDecode(b []byte, values ...interface{}) error {
var (
err error
buf = bytes.NewBuffer(b)
)
for i := 0; i < len(values); i++ {
if err = binary.Read(buf, binary.LittleEndian, values[i]); err != nil {
err = gerror.Wrap(err, `binary.Read failed`)
return err
}
}
return nil
}
func LeEncodeString(s string) []byte {
return []byte(s)
}
func LeDecodeToString(b []byte) string {
return string(b)
}
func LeEncodeBool(b bool) []byte {
if b {
return []byte{1}
} else {
return []byte{0}
}
}
func LeEncodeInt(i int) []byte {
if i <= math.MaxInt8 {
return EncodeInt8(int8(i))
} else if i <= math.MaxInt16 {
return EncodeInt16(int16(i))
} else if i <= math.MaxInt32 {
return EncodeInt32(int32(i))
} else {
return EncodeInt64(int64(i))
}
}
func LeEncodeUint(i uint) []byte {
if i <= math.MaxUint8 {
return EncodeUint8(uint8(i))
} else if i <= math.MaxUint16 {
return EncodeUint16(uint16(i))
} else if i <= math.MaxUint32 {
return EncodeUint32(uint32(i))
} else {
return EncodeUint64(uint64(i))
}
}
func LeEncodeInt8(i int8) []byte {
return []byte{byte(i)}
}
func LeEncodeUint8(i uint8) []byte {
return []byte{i}
}
func LeEncodeInt16(i int16) []byte {
b := make([]byte, 2)
binary.LittleEndian.PutUint16(b, uint16(i))
return b
}
func LeEncodeUint16(i uint16) []byte {
b := make([]byte, 2)
binary.LittleEndian.PutUint16(b, i)
return b
}
func LeEncodeInt32(i int32) []byte {
b := make([]byte, 4)
binary.LittleEndian.PutUint32(b, uint32(i))
return b
}
func LeEncodeUint32(i uint32) []byte {
b := make([]byte, 4)
binary.LittleEndian.PutUint32(b, i)
return b
}
func LeEncodeInt64(i int64) []byte {
b := make([]byte, 8)
binary.LittleEndian.PutUint64(b, uint64(i))
return b
}
func LeEncodeUint64(i uint64) []byte {
b := make([]byte, 8)
binary.LittleEndian.PutUint64(b, i)
return b
}
func LeEncodeFloat32(f float32) []byte {
bits := math.Float32bits(f)
b := make([]byte, 4)
binary.LittleEndian.PutUint32(b, bits)
return b
}
func LeEncodeFloat64(f float64) []byte {
bits := math.Float64bits(f)
b := make([]byte, 8)
binary.LittleEndian.PutUint64(b, bits)
return b
}
func LeDecodeToInt(b []byte) int {
if len(b) < 2 {
return int(LeDecodeToUint8(b))
} else if len(b) < 3 {
return int(LeDecodeToUint16(b))
} else if len(b) < 5 {
return int(LeDecodeToUint32(b))
} else {
return int(LeDecodeToUint64(b))
}
}
func LeDecodeToUint(b []byte) uint {
if len(b) < 2 {
return uint(LeDecodeToUint8(b))
} else if len(b) < 3 {
return uint(LeDecodeToUint16(b))
} else if len(b) < 5 {
return uint(LeDecodeToUint32(b))
} else {
return uint(LeDecodeToUint64(b))
}
}
func LeDecodeToBool(b []byte) bool {
if len(b) == 0 {
return false
}
if bytes.Equal(b, make([]byte, len(b))) {
return false
}
return true
}
func LeDecodeToInt8(b []byte) int8 {
if len(b) == 0 {
panic(`empty slice given`)
}
return int8(b[0])
}
func LeDecodeToUint8(b []byte) uint8 {
if len(b) == 0 {
panic(`empty slice given`)
}
return b[0]
}
func LeDecodeToInt16(b []byte) int16 {
return int16(binary.LittleEndian.Uint16(LeFillUpSize(b, 2)))
}
func LeDecodeToUint16(b []byte) uint16 {
return binary.LittleEndian.Uint16(LeFillUpSize(b, 2))
}
func LeDecodeToInt32(b []byte) int32 {
return int32(binary.LittleEndian.Uint32(LeFillUpSize(b, 4)))
}
func LeDecodeToUint32(b []byte) uint32 {
return binary.LittleEndian.Uint32(LeFillUpSize(b, 4))
}
func LeDecodeToInt64(b []byte) int64 {
return int64(binary.LittleEndian.Uint64(LeFillUpSize(b, 8)))
}
func LeDecodeToUint64(b []byte) uint64 {
return binary.LittleEndian.Uint64(LeFillUpSize(b, 8))
}
func LeDecodeToFloat32(b []byte) float32 {
return math.Float32frombits(binary.LittleEndian.Uint32(LeFillUpSize(b, 4)))
}
func LeDecodeToFloat64(b []byte) float64 {
return math.Float64frombits(binary.LittleEndian.Uint64(LeFillUpSize(b, 8)))
}
// LeFillUpSize fills up the bytes `b` to given length `l` using LittleEndian.
//
// Note that it creates a new bytes slice by copying the original one to avoid changing
// the original parameter bytes.
func LeFillUpSize(b []byte, l int) []byte {
if len(b) >= l {
return b[:l]
}
c := make([]byte, l)
copy(c, b)
return c
}