Merge master into breakout_swarm

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

gateway/vendor/github.com/gogo/protobuf/io/uint32.go

@@ -0,0 +1,138 @@
+// 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 (
+	"encoding/binary"
+	"io"
+
+	"github.com/gogo/protobuf/proto"
+)
+
+const uint32BinaryLen = 4
+
+func NewUint32DelimitedWriter(w io.Writer, byteOrder binary.ByteOrder) WriteCloser {
+	return &uint32Writer{w, byteOrder, nil, make([]byte, uint32BinaryLen)}
+}
+
+func NewSizeUint32DelimitedWriter(w io.Writer, byteOrder binary.ByteOrder, size int) WriteCloser {
+	return &uint32Writer{w, byteOrder, make([]byte, size), make([]byte, uint32BinaryLen)}
+}
+
+type uint32Writer struct {
+	w         io.Writer
+	byteOrder binary.ByteOrder
+	buffer    []byte
+	lenBuf    []byte
+}
+
+func (this *uint32Writer) writeFallback(msg proto.Message) error {
+	data, err := proto.Marshal(msg)
+	if err != nil {
+		return err
+	}
+
+	length := uint32(len(data))
+	this.byteOrder.PutUint32(this.lenBuf, length)
+	if _, err = this.w.Write(this.lenBuf); err != nil {
+		return err
+	}
+	_, err = this.w.Write(data)
+	return err
+}
+
+func (this *uint32Writer) WriteMsg(msg proto.Message) error {
+	m, ok := msg.(marshaler)
+	if !ok {
+		return this.writeFallback(msg)
+	}
+
+	n, ok := getSize(m)
+	if !ok {
+		return this.writeFallback(msg)
+	}
+
+	size := n + uint32BinaryLen
+	if size > len(this.buffer) {
+		this.buffer = make([]byte, size)
+	}
+
+	this.byteOrder.PutUint32(this.buffer, uint32(n))
+	if _, err := m.MarshalTo(this.buffer[uint32BinaryLen:]); err != nil {
+		return err
+	}
+
+	_, err := this.w.Write(this.buffer[:size])
+	return err
+}
+
+func (this *uint32Writer) Close() error {
+	if closer, ok := this.w.(io.Closer); ok {
+		return closer.Close()
+	}
+	return nil
+}
+
+type uint32Reader struct {
+	r         io.Reader
+	byteOrder binary.ByteOrder
+	lenBuf    []byte
+	buf       []byte
+	maxSize   int
+}
+
+func NewUint32DelimitedReader(r io.Reader, byteOrder binary.ByteOrder, maxSize int) ReadCloser {
+	return &uint32Reader{r, byteOrder, make([]byte, 4), nil, maxSize}
+}
+
+func (this *uint32Reader) ReadMsg(msg proto.Message) error {
+	if _, err := io.ReadFull(this.r, this.lenBuf); err != nil {
+		return err
+	}
+	length32 := this.byteOrder.Uint32(this.lenBuf)
+	length := int(length32)
+	if length < 0 || length > this.maxSize {
+		return io.ErrShortBuffer
+	}
+	if length >= len(this.buf) {
+		this.buf = make([]byte, length)
+	}
+	_, err := io.ReadFull(this.r, this.buf[:length])
+	if err != nil {
+		return err
+	}
+	return proto.Unmarshal(this.buf[:length], msg)
+}
+
+func (this *uint32Reader) Close() error {
+	if closer, ok := this.r.(io.Closer); ok {
+		return closer.Close()
+	}
+	return nil
+}