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