60 lines
2.1 KiB
Go
60 lines
2.1 KiB
Go
// Protocol Buffers for Go with Gadgets
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//
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// Copyright (c) 2018, The GoGo Authors. All rights reserved.
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// http://github.com/gogo/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// +build purego appengine js
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// This file contains an implementation of proto field accesses using package reflect.
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// It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
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// be used on App Engine.
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package proto
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import (
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"reflect"
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)
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// TODO: untested, so probably incorrect.
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func (p pointer) getRef() pointer {
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return pointer{v: p.v.Addr()}
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}
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func (p pointer) appendRef(v pointer, typ reflect.Type) {
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slice := p.getSlice(typ)
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elem := v.asPointerTo(typ).Elem()
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newSlice := reflect.Append(slice, elem)
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slice.Set(newSlice)
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}
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func (p pointer) getSlice(typ reflect.Type) reflect.Value {
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sliceTyp := reflect.SliceOf(typ)
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slice := p.asPointerTo(sliceTyp)
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slice = slice.Elem()
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return slice
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}
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