package io import ( "io" "v2ray.com/core/common" "v2ray.com/core/common/alloc" ) // Writer extends io.Writer with alloc.Buffer. type Writer interface { common.Releasable // Write writes an alloc.Buffer into underlying writer. Write(*alloc.Buffer) error } // AdaptiveWriter is a Writer that writes alloc.Buffer into underlying writer. type AdaptiveWriter struct { writer io.Writer } // NewAdaptiveWriter creates a new AdaptiveWriter. func NewAdaptiveWriter(writer io.Writer) *AdaptiveWriter { return &AdaptiveWriter{ writer: writer, } } // Write implements Writer.Write(). Write() takes ownership of the given buffer. func (this *AdaptiveWriter) Write(buffer *alloc.Buffer) error { defer buffer.Release() for !buffer.IsEmpty() { nBytes, err := this.writer.Write(buffer.Value) if err != nil { return err } buffer.SliceFrom(nBytes) } return nil } func (this *AdaptiveWriter) Release() { this.writer = nil }