forked from gitea/gitea
112 lines
1.9 KiB
Go
112 lines
1.9 KiB
Go
package iohelper
|
|
|
|
import (
|
|
"encoding/binary"
|
|
|
|
pb "github.com/golang/protobuf/proto"
|
|
"github.com/juju/errors"
|
|
)
|
|
|
|
type PbBuffer struct {
|
|
b []byte
|
|
}
|
|
|
|
func NewPbBuffer() *PbBuffer {
|
|
b := []byte{}
|
|
return &PbBuffer{
|
|
b: b,
|
|
}
|
|
}
|
|
|
|
func (b *PbBuffer) Bytes() []byte {
|
|
return b.b
|
|
}
|
|
|
|
func (b *PbBuffer) Write(d []byte) (int, error) {
|
|
b.b = append(b.b, d...)
|
|
return len(d), nil
|
|
}
|
|
|
|
func (b *PbBuffer) WriteByte(d byte) error {
|
|
return binary.Write(b, binary.BigEndian, d)
|
|
}
|
|
|
|
func (b *PbBuffer) WriteString(d string) error {
|
|
return binary.Write(b, binary.BigEndian, d)
|
|
}
|
|
|
|
func (b *PbBuffer) WriteInt32(d int32) error {
|
|
return binary.Write(b, binary.BigEndian, d)
|
|
}
|
|
|
|
func (b *PbBuffer) WriteInt64(d int64) error {
|
|
return binary.Write(b, binary.BigEndian, d)
|
|
}
|
|
|
|
func (b *PbBuffer) WriteFloat32(d float32) error {
|
|
return binary.Write(b, binary.BigEndian, d)
|
|
}
|
|
|
|
func (b *PbBuffer) WriteFloat64(d float64) error {
|
|
return binary.Write(b, binary.BigEndian, d)
|
|
}
|
|
|
|
func (b *PbBuffer) WritePBMessage(d pb.Message) error {
|
|
buf, err := pb.Marshal(d)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
|
|
_, err = b.Write(buf)
|
|
return errors.Trace(err)
|
|
}
|
|
|
|
func (b *PbBuffer) WriteDelimitedBuffers(bufs ...*PbBuffer) error {
|
|
totalLength := 0
|
|
lens := make([][]byte, len(bufs))
|
|
for i, v := range bufs {
|
|
n := len(v.Bytes())
|
|
lenb := pb.EncodeVarint(uint64(n))
|
|
|
|
totalLength += len(lenb) + n
|
|
lens[i] = lenb
|
|
}
|
|
|
|
err := b.WriteInt32(int32(totalLength))
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
|
|
for i, v := range bufs {
|
|
_, err = b.Write(lens[i])
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
|
|
_, err = b.Write(v.Bytes())
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (b *PbBuffer) PrependSize() error {
|
|
size := int32(len(b.b))
|
|
newBuf := NewPbBuffer()
|
|
|
|
err := newBuf.WriteInt32(size)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
|
|
_, err = newBuf.Write(b.b)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
|
|
*b = *newBuf
|
|
return nil
|
|
}
|