v2ray-core/common/buf/multi_buffer.go

104 lines
1.6 KiB
Go

package buf
import (
"io"
"net"
)
type MultiBufferWriter interface {
WriteMultiBuffer(MultiBuffer) (int, error)
}
type MultiBufferReader interface {
ReadMultiBuffer() (MultiBuffer, error)
}
type MultiBuffer []*Buffer
func NewMultiBuffer() MultiBuffer {
return MultiBuffer(make([]*Buffer, 0, 128))
}
func NewMultiBufferValue(b ...*Buffer) MultiBuffer {
return MultiBuffer(b)
}
func (b *MultiBuffer) Append(buf *Buffer) {
*b = append(*b, buf)
}
func (b *MultiBuffer) AppendMulti(mb MultiBuffer) {
*b = append(*b, mb...)
}
func (mb *MultiBuffer) Read(b []byte) (int, error) {
if len(*mb) == 0 {
return 0, io.EOF
}
endIndex := len(*mb)
totalBytes := 0
for i, bb := range *mb {
nBytes, err := bb.Read(b)
totalBytes += nBytes
if err != nil {
return totalBytes, err
}
b = b[nBytes:]
if bb.IsEmpty() {
bb.Release()
} else {
endIndex = i
break
}
}
*mb = (*mb)[endIndex:]
return totalBytes, nil
}
func (mb MultiBuffer) Len() int {
size := 0
for _, b := range mb {
size += b.Len()
}
return size
}
func (mb MultiBuffer) IsEmpty() bool {
for _, b := range mb {
if !b.IsEmpty() {
return false
}
}
return true
}
func (mb MultiBuffer) Release() {
for i, b := range mb {
b.Release()
mb[i] = nil
}
}
func (mb MultiBuffer) ToNetBuffers() net.Buffers {
bs := make([][]byte, len(mb))
for i, b := range mb {
bs[i] = b.Bytes()
}
return bs
}
func (mb *MultiBuffer) SliceBySize(size int) MultiBuffer {
slice := NewMultiBuffer()
sliceSize := 0
endIndex := len(*mb)
for i, b := range *mb {
if b.Len()+sliceSize > size {
endIndex = i
break
}
slice.Append(b)
}
*mb = (*mb)[endIndex:]
return slice
}