vendor files

vendor/github.com/gogo/protobuf/vanity/field.go

@@ -0,0 +1,90 @@
+// 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)
+}