status-go/vendor/github.com/libp2p/go-msgio/protoio/interfaces.go

74 lines
2.1 KiB
Go

// Adapted from gogo/protobuf to use multiformats/go-varint for
// efficient, interoperable length-prefixing.
//
// # 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.
//
// Deprecated: GoGo Protobuf is deprecated and unmaintained.
package protoio
import (
"io"
"github.com/gogo/protobuf/proto"
)
type Writer interface {
WriteMsg(proto.Message) error
}
type WriteCloser interface {
Writer
io.Closer
}
type Reader interface {
ReadMsg(msg proto.Message) error
}
type ReadCloser interface {
Reader
io.Closer
}
func getSize(v interface{}) (int, bool) {
if sz, ok := v.(interface {
Size() (n int)
}); ok {
return sz.Size(), true
} else if sz, ok := v.(interface {
ProtoSize() (n int)
}); ok {
return sz.ProtoSize(), true
} else {
return 0, false
}
}