grpc codec

codec/codec.go

@@ -0,0 +1,73 @@
+// Copyright (c) 2015, Vastech SA (PTY) LTD. All rights reserved.
+// http://github.com/gogo/protobuf/gogoproto
+//
+// 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 codec
+
+import (
+	"github.com/gogo/protobuf/proto"
+)
+
+type Codec interface {
+	Marshal(v interface{}) ([]byte, error)
+	Unmarshal(data []byte, v interface{}) error
+	String() string
+}
+
+type marshaler interface {
+	MarshalTo(data []byte) (n int, err error)
+	Size() (n int)
+}
+
+type codec struct {
+	buf []byte
+}
+
+func (this *codec) String() string {
+	return "proto"
+}
+
+func New(size int) Codec {
+	return &codec{make([]byte, size)}
+}
+
+func (this *codec) Marshal(v interface{}) ([]byte, error) {
+	if m, ok := v.(marshaler); ok {
+		n := m.Size()
+		if n > len(this.buf) {
+			this.buf = make([]byte, n)
+		}
+		_, err := m.MarshalTo(this.buf)
+		if err != nil {
+			return nil, err
+		}
+		return this.buf[:n], nil
+	}
+	return proto.Marshal(v.(proto.Message))
+}
+
+func (this *codec) Unmarshal(data []byte, v interface{}) error {
+	return proto.Unmarshal(data, v.(proto.Message))
+}

codec/codec_test.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2015, Vastech SA (PTY) LTD. All rights reserved.
+// http://github.com/gogo/protobuf/gogoproto
+//
+// 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 codec
+
+import (
+	"github.com/gogo/protobuf/test"
+	"math/rand"
+	"testing"
+	"time"
+)
+
+func TestCodec(t *testing.T) {
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	in := test.NewPopulatedNinOptStruct(r, true)
+	c := New(r.Intn(1024))
+	data, err := c.Marshal(in)
+	if err != nil {
+		t.Fatal(err)
+	}
+	out := &test.NinOptStruct{}
+	err = c.Unmarshal(data, out)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := in.VerboseEqual(out); err != nil {
+		t.Fatal(err)
+	}
+}