syncthing/vendor/github.com/gogo/protobuf/vanity/field.go
2017-12-29 11:38:00 +00:00

91 lines
2.9 KiB
Go

// Protocol Buffers for Go with Gadgets
//
// Copyright (c) 2015, The GoGo Authors. 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 vanity
import (
"github.com/gogo/protobuf/gogoproto"
"github.com/gogo/protobuf/proto"
descriptor "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
)
func FieldHasBoolExtension(field *descriptor.FieldDescriptorProto, extension *proto.ExtensionDesc) bool {
if field.Options == nil {
return false
}
value, err := proto.GetExtension(field.Options, extension)
if err != nil {
return false
}
if value == nil {
return false
}
if value.(*bool) == nil {
return false
}
return true
}
func SetBoolFieldOption(extension *proto.ExtensionDesc, value bool) func(field *descriptor.FieldDescriptorProto) {
return func(field *descriptor.FieldDescriptorProto) {
if FieldHasBoolExtension(field, extension) {
return
}
if field.Options == nil {
field.Options = &descriptor.FieldOptions{}
}
if err := proto.SetExtension(field.Options, extension, &value); err != nil {
panic(err)
}
}
}
func TurnOffNullable(field *descriptor.FieldDescriptorProto) {
if field.IsRepeated() && !field.IsMessage() {
return
}
SetBoolFieldOption(gogoproto.E_Nullable, false)(field)
}
func TurnOffNullableForNativeTypes(field *descriptor.FieldDescriptorProto) {
if field.IsRepeated() || field.IsMessage() {
return
}
SetBoolFieldOption(gogoproto.E_Nullable, false)(field)
}
func TurnOffNullableForNativeTypesWithoutDefaultsOnly(field *descriptor.FieldDescriptorProto) {
if field.IsRepeated() || field.IsMessage() {
return
}
if field.DefaultValue != nil {
return
}
SetBoolFieldOption(gogoproto.E_Nullable, false)(field)
}