mirror of https://github.com/v2ray/v2ray-core
102 lines
1.9 KiB
Go
102 lines
1.9 KiB
Go
package buf
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import (
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"io"
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"v2ray.com/core/common/errors"
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)
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// BytesToBufferReader is a Reader that adjusts its reading speed automatically.
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type BytesToBufferReader struct {
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reader io.Reader
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buffer *Buffer
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}
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// Read implements Reader.Read().
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func (r *BytesToBufferReader) Read() (MultiBuffer, error) {
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if err := r.buffer.Reset(ReadFrom(r.reader)); err != nil {
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return nil, err
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}
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mb := NewMultiBuffer()
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for !r.buffer.IsEmpty() {
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b := New()
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b.AppendSupplier(ReadFrom(r.buffer))
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mb.Append(b)
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}
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return mb, nil
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}
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type readerAdpater struct {
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MultiBufferReader
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}
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func (r *readerAdpater) Read() (MultiBuffer, error) {
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return r.ReadMultiBuffer()
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}
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type bufferToBytesReader struct {
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stream Reader
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leftOver MultiBuffer
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}
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func (r *bufferToBytesReader) Read(b []byte) (int, error) {
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if r.leftOver != nil {
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nBytes, err := r.leftOver.Read(b)
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if r.leftOver.IsEmpty() {
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r.leftOver.Release()
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r.leftOver = nil
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}
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return nBytes, err
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}
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mb, err := r.stream.Read()
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if err != nil {
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return 0, err
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}
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nBytes, err := mb.Read(b)
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if !mb.IsEmpty() {
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r.leftOver = mb
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}
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return nBytes, err
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}
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func (r *bufferToBytesReader) ReadMultiBuffer() (MultiBuffer, error) {
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if r.leftOver != nil {
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mb := r.leftOver
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r.leftOver = nil
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return mb, nil
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}
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return r.stream.Read()
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}
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func (r *bufferToBytesReader) writeToInternal(writer io.Writer) (int64, error) {
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mbWriter := NewWriter(writer)
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totalBytes := int64(0)
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if r.leftOver != nil {
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mbWriter.Write(r.leftOver)
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totalBytes += int64(r.leftOver.Len())
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}
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for {
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mb, err := r.stream.Read()
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if err != nil {
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return totalBytes, err
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}
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totalBytes += int64(mb.Len())
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if err := mbWriter.Write(mb); err != nil {
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return totalBytes, err
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}
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}
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}
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func (r *bufferToBytesReader) WriteTo(writer io.Writer) (int64, error) {
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nBytes, err := r.writeToInternal(writer)
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if errors.Cause(err) == io.EOF {
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return nBytes, nil
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}
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return nBytes, err
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}
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