1// Protocol Buffers for Go with Gadgets
2//
3// Copyright (c) 2015, The GoGo Authors.  rights reserved.
4// http://github.com/gogo/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29package vanity
30
31import (
32	"github.com/gogo/protobuf/gogoproto"
33	"github.com/gogo/protobuf/proto"
34	descriptor "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
35)
36
37func FieldHasBoolExtension(field *descriptor.FieldDescriptorProto, extension *proto.ExtensionDesc) bool {
38	if field.Options == nil {
39		return false
40	}
41	value, err := proto.GetExtension(field.Options, extension)
42	if err != nil {
43		return false
44	}
45	if value == nil {
46		return false
47	}
48	if value.(*bool) == nil {
49		return false
50	}
51	return true
52}
53
54func SetBoolFieldOption(extension *proto.ExtensionDesc, value bool) func(field *descriptor.FieldDescriptorProto) {
55	return func(field *descriptor.FieldDescriptorProto) {
56		if FieldHasBoolExtension(field, extension) {
57			return
58		}
59		if field.Options == nil {
60			field.Options = &descriptor.FieldOptions{}
61		}
62		if err := proto.SetExtension(field.Options, extension, &value); err != nil {
63			panic(err)
64		}
65	}
66}
67
68func TurnOffNullable(field *descriptor.FieldDescriptorProto) {
69	if field.IsRepeated() && !field.IsMessage() {
70		return
71	}
72	SetBoolFieldOption(gogoproto.E_Nullable, false)(field)
73}
74
75func TurnOffNullableForNativeTypes(field *descriptor.FieldDescriptorProto) {
76	if field.IsRepeated() || field.IsMessage() {
77		return
78	}
79	SetBoolFieldOption(gogoproto.E_Nullable, false)(field)
80}
81
82func TurnOffNullableForNativeTypesWithoutDefaultsOnly(field *descriptor.FieldDescriptorProto) {
83	if field.IsRepeated() || field.IsMessage() {
84		return
85	}
86	if field.DefaultValue != nil {
87		return
88	}
89	SetBoolFieldOption(gogoproto.E_Nullable, false)(field)
90}
91