mirror of https://github.com/v2ray/v2ray-core
139 lines
2.6 KiB
Go
139 lines
2.6 KiB
Go
package buf
|
|
|
|
import "net"
|
|
|
|
type MultiBufferWriter interface {
|
|
WriteMultiBuffer(MultiBuffer) error
|
|
}
|
|
|
|
type MultiBufferReader interface {
|
|
ReadMultiBuffer() (MultiBuffer, error)
|
|
}
|
|
|
|
// MultiBuffer is a list of Buffers. The order of Buffer matters.
|
|
type MultiBuffer []*Buffer
|
|
|
|
// NewMultiBuffer creates a new MultiBuffer instance.
|
|
func NewMultiBuffer() MultiBuffer {
|
|
return MultiBuffer(make([]*Buffer, 0, 128))
|
|
}
|
|
|
|
// NewMultiBufferValue wraps a list of Buffers into MultiBuffer.
|
|
func NewMultiBufferValue(b ...*Buffer) MultiBuffer {
|
|
return MultiBuffer(b)
|
|
}
|
|
|
|
func (mb *MultiBuffer) Append(buf *Buffer) {
|
|
*mb = append(*mb, buf)
|
|
}
|
|
|
|
func (mb *MultiBuffer) AppendMulti(buf MultiBuffer) {
|
|
*mb = append(*mb, buf...)
|
|
}
|
|
|
|
func (mb MultiBuffer) Copy(b []byte) int {
|
|
total := 0
|
|
for _, bb := range mb {
|
|
nBytes := copy(b[total:], bb.Bytes())
|
|
total += nBytes
|
|
if nBytes < bb.Len() {
|
|
break
|
|
}
|
|
}
|
|
return total
|
|
}
|
|
|
|
func (mb *MultiBuffer) Read(b []byte) (int, error) {
|
|
endIndex := len(*mb)
|
|
totalBytes := 0
|
|
for i, bb := range *mb {
|
|
nBytes, _ := bb.Read(b)
|
|
totalBytes += nBytes
|
|
b = b[nBytes:]
|
|
if bb.IsEmpty() {
|
|
bb.Release()
|
|
} else {
|
|
endIndex = i
|
|
break
|
|
}
|
|
}
|
|
*mb = (*mb)[endIndex:]
|
|
return totalBytes, nil
|
|
}
|
|
|
|
func (mb *MultiBuffer) Write(b []byte) {
|
|
n := len(*mb)
|
|
if n > 0 && !(*mb)[n-1].IsFull() {
|
|
nBytes, _ := (*mb)[n-1].Write(b)
|
|
b = b[nBytes:]
|
|
}
|
|
|
|
for len(b) > 0 {
|
|
bb := New()
|
|
nBytes, _ := bb.Write(b)
|
|
b = b[nBytes:]
|
|
mb.Append(bb)
|
|
}
|
|
}
|
|
|
|
// Len returns the total number of bytes in the MultiBuffer.
|
|
func (mb MultiBuffer) Len() int {
|
|
size := 0
|
|
for _, b := range mb {
|
|
size += b.Len()
|
|
}
|
|
return size
|
|
}
|
|
|
|
// IsEmpty return true if the MultiBuffer has no content.
|
|
func (mb MultiBuffer) IsEmpty() bool {
|
|
for _, b := range mb {
|
|
if !b.IsEmpty() {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Release releases all Buffers in the MultiBuffer.
|
|
func (mb MultiBuffer) Release() {
|
|
for i, b := range mb {
|
|
b.Release()
|
|
mb[i] = nil
|
|
}
|
|
}
|
|
|
|
// ToNetBuffers converts this MultiBuffer to net.Buffers. The return net.Buffers points to the same content of the MultiBuffer.
|
|
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
|
|
}
|
|
sliceSize += b.Len()
|
|
slice.Append(b)
|
|
}
|
|
*mb = (*mb)[endIndex:]
|
|
return slice
|
|
}
|
|
|
|
func (mb *MultiBuffer) SplitFirst() *Buffer {
|
|
if len(*mb) == 0 {
|
|
return nil
|
|
}
|
|
b := (*mb)[0]
|
|
*mb = (*mb)[1:]
|
|
return b
|
|
}
|