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// Protocol Buffers for Go with Gadgets
//
// Copyright (c) 2013, The GoGo Authors. All rights reserved.
// http://github.com/gogo/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package io
import (
"github.com/gogo/protobuf/proto"
"io"
)
func NewFullWriter(w io.Writer) WriteCloser {
return &fullWriter{w, nil}
}
type fullWriter struct {
w io.Writer
buffer []byte
}
func (this *fullWriter) WriteMsg(msg proto.Message) (err error) {
var data []byte
if m, ok := msg.(marshaler); ok {
n, ok := getSize(m)
if !ok {
data, err = proto.Marshal(msg)
if err != nil {
return err
}
}
if n >= len(this.buffer) {
this.buffer = make([]byte, n)
}
_, err = m.MarshalTo(this.buffer)
if err != nil {
return err
}
data = this.buffer[:n]
} else {
data, err = proto.Marshal(msg)
if err != nil {
return err
}
}
_, err = this.w.Write(data)
return err
}
func (this *fullWriter) Close() error {
if closer, ok := this.w.(io.Closer); ok {
return closer.Close()
}
return nil
}
type fullReader struct {
r io.Reader
buf []byte
}
func NewFullReader(r io.Reader, maxSize int) ReadCloser {
return &fullReader{r, make([]byte, maxSize)}
}
func (this *fullReader) ReadMsg(msg proto.Message) error {
length, err := this.r.Read(this.buf)
if err != nil {
return err
}
return proto.Unmarshal(this.buf[:length], msg)
}
func (this *fullReader) Close() error {
if closer, ok := this.r.(io.Closer); ok {
return closer.Close()
}
return nil
}
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