390 lines
10 KiB
Go
390 lines
10 KiB
Go
// Protocol Buffers for Go with Gadgets
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//
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// Copyright (c) 2013, 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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package descriptor
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import (
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"strings"
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)
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func (msg *DescriptorProto) GetMapFields() (*FieldDescriptorProto, *FieldDescriptorProto) {
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if !msg.GetOptions().GetMapEntry() {
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return nil, nil
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}
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return msg.GetField()[0], msg.GetField()[1]
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}
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func dotToUnderscore(r rune) rune {
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if r == '.' {
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return '_'
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}
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return r
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}
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func (field *FieldDescriptorProto) WireType() (wire int) {
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switch *field.Type {
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case FieldDescriptorProto_TYPE_DOUBLE:
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return 1
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case FieldDescriptorProto_TYPE_FLOAT:
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return 5
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case FieldDescriptorProto_TYPE_INT64:
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return 0
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case FieldDescriptorProto_TYPE_UINT64:
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return 0
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case FieldDescriptorProto_TYPE_INT32:
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return 0
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case FieldDescriptorProto_TYPE_UINT32:
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return 0
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case FieldDescriptorProto_TYPE_FIXED64:
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return 1
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case FieldDescriptorProto_TYPE_FIXED32:
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return 5
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case FieldDescriptorProto_TYPE_BOOL:
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return 0
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case FieldDescriptorProto_TYPE_STRING:
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return 2
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case FieldDescriptorProto_TYPE_GROUP:
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return 2
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case FieldDescriptorProto_TYPE_MESSAGE:
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return 2
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case FieldDescriptorProto_TYPE_BYTES:
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return 2
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case FieldDescriptorProto_TYPE_ENUM:
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return 0
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case FieldDescriptorProto_TYPE_SFIXED32:
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return 5
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case FieldDescriptorProto_TYPE_SFIXED64:
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return 1
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case FieldDescriptorProto_TYPE_SINT32:
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return 0
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case FieldDescriptorProto_TYPE_SINT64:
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return 0
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}
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panic("unreachable")
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}
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func (field *FieldDescriptorProto) GetKeyUint64() (x uint64) {
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packed := field.IsPacked()
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wireType := field.WireType()
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fieldNumber := field.GetNumber()
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if packed {
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wireType = 2
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}
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x = uint64(uint32(fieldNumber)<<3 | uint32(wireType))
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return x
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}
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func (field *FieldDescriptorProto) GetKey3Uint64() (x uint64) {
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packed := field.IsPacked3()
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wireType := field.WireType()
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fieldNumber := field.GetNumber()
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if packed {
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wireType = 2
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}
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x = uint64(uint32(fieldNumber)<<3 | uint32(wireType))
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return x
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}
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func (field *FieldDescriptorProto) GetKey() []byte {
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x := field.GetKeyUint64()
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i := 0
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keybuf := make([]byte, 0)
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for i = 0; x > 127; i++ {
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keybuf = append(keybuf, 0x80|uint8(x&0x7F))
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x >>= 7
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}
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keybuf = append(keybuf, uint8(x))
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return keybuf
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}
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func (field *FieldDescriptorProto) GetKey3() []byte {
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x := field.GetKey3Uint64()
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i := 0
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keybuf := make([]byte, 0)
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for i = 0; x > 127; i++ {
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keybuf = append(keybuf, 0x80|uint8(x&0x7F))
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x >>= 7
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}
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keybuf = append(keybuf, uint8(x))
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return keybuf
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}
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func (desc *FileDescriptorSet) GetField(packageName, messageName, fieldName string) *FieldDescriptorProto {
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msg := desc.GetMessage(packageName, messageName)
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if msg == nil {
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return nil
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}
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for _, field := range msg.GetField() {
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if field.GetName() == fieldName {
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return field
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}
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}
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return nil
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}
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func (file *FileDescriptorProto) GetMessage(typeName string) *DescriptorProto {
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for _, msg := range file.GetMessageType() {
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if msg.GetName() == typeName {
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return msg
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}
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nes := file.GetNestedMessage(msg, strings.TrimPrefix(typeName, msg.GetName()+"."))
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if nes != nil {
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return nes
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}
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}
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return nil
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}
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func (file *FileDescriptorProto) GetNestedMessage(msg *DescriptorProto, typeName string) *DescriptorProto {
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for _, nes := range msg.GetNestedType() {
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if nes.GetName() == typeName {
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return nes
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}
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res := file.GetNestedMessage(nes, strings.TrimPrefix(typeName, nes.GetName()+"."))
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if res != nil {
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return res
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}
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}
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return nil
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}
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func (desc *FileDescriptorSet) GetMessage(packageName string, typeName string) *DescriptorProto {
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for _, file := range desc.GetFile() {
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if strings.Map(dotToUnderscore, file.GetPackage()) != strings.Map(dotToUnderscore, packageName) {
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continue
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}
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for _, msg := range file.GetMessageType() {
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if msg.GetName() == typeName {
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return msg
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}
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}
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for _, msg := range file.GetMessageType() {
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for _, nes := range msg.GetNestedType() {
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if nes.GetName() == typeName {
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return nes
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}
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if msg.GetName()+"."+nes.GetName() == typeName {
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return nes
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}
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}
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}
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}
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return nil
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}
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func (desc *FileDescriptorSet) IsProto3(packageName string, typeName string) bool {
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for _, file := range desc.GetFile() {
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if strings.Map(dotToUnderscore, file.GetPackage()) != strings.Map(dotToUnderscore, packageName) {
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continue
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}
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for _, msg := range file.GetMessageType() {
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if msg.GetName() == typeName {
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return file.GetSyntax() == "proto3"
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}
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}
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for _, msg := range file.GetMessageType() {
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for _, nes := range msg.GetNestedType() {
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if nes.GetName() == typeName {
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return file.GetSyntax() == "proto3"
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}
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if msg.GetName()+"."+nes.GetName() == typeName {
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return file.GetSyntax() == "proto3"
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}
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}
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}
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}
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return false
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}
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func (msg *DescriptorProto) IsExtendable() bool {
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return len(msg.GetExtensionRange()) > 0
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}
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func (desc *FileDescriptorSet) FindExtension(packageName string, typeName string, fieldName string) (extPackageName string, field *FieldDescriptorProto) {
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parent := desc.GetMessage(packageName, typeName)
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if parent == nil {
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return "", nil
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}
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if !parent.IsExtendable() {
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return "", nil
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}
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extendee := "." + packageName + "." + typeName
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for _, file := range desc.GetFile() {
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for _, ext := range file.GetExtension() {
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if strings.Map(dotToUnderscore, file.GetPackage()) == strings.Map(dotToUnderscore, packageName) {
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if !(ext.GetExtendee() == typeName || ext.GetExtendee() == extendee) {
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continue
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}
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} else {
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if ext.GetExtendee() != extendee {
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continue
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}
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}
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if ext.GetName() == fieldName {
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return file.GetPackage(), ext
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}
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}
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}
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return "", nil
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}
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func (desc *FileDescriptorSet) FindExtensionByFieldNumber(packageName string, typeName string, fieldNum int32) (extPackageName string, field *FieldDescriptorProto) {
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parent := desc.GetMessage(packageName, typeName)
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if parent == nil {
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return "", nil
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}
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if !parent.IsExtendable() {
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return "", nil
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}
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extendee := "." + packageName + "." + typeName
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for _, file := range desc.GetFile() {
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for _, ext := range file.GetExtension() {
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if strings.Map(dotToUnderscore, file.GetPackage()) == strings.Map(dotToUnderscore, packageName) {
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if !(ext.GetExtendee() == typeName || ext.GetExtendee() == extendee) {
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continue
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}
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} else {
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if ext.GetExtendee() != extendee {
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continue
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}
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}
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if ext.GetNumber() == fieldNum {
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return file.GetPackage(), ext
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}
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}
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}
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return "", nil
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}
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func (desc *FileDescriptorSet) FindMessage(packageName string, typeName string, fieldName string) (msgPackageName string, msgName string) {
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parent := desc.GetMessage(packageName, typeName)
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if parent == nil {
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return "", ""
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}
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field := parent.GetFieldDescriptor(fieldName)
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if field == nil {
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var extPackageName string
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extPackageName, field = desc.FindExtension(packageName, typeName, fieldName)
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if field == nil {
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return "", ""
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}
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packageName = extPackageName
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}
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typeNames := strings.Split(field.GetTypeName(), ".")
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if len(typeNames) == 1 {
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msg := desc.GetMessage(packageName, typeName)
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if msg == nil {
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return "", ""
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}
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return packageName, msg.GetName()
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}
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if len(typeNames) > 2 {
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for i := 1; i < len(typeNames)-1; i++ {
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packageName = strings.Join(typeNames[1:len(typeNames)-i], ".")
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typeName = strings.Join(typeNames[len(typeNames)-i:], ".")
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msg := desc.GetMessage(packageName, typeName)
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if msg != nil {
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typeNames := strings.Split(msg.GetName(), ".")
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if len(typeNames) == 1 {
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return packageName, msg.GetName()
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}
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return strings.Join(typeNames[1:len(typeNames)-1], "."), typeNames[len(typeNames)-1]
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}
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}
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}
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return "", ""
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}
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func (msg *DescriptorProto) GetFieldDescriptor(fieldName string) *FieldDescriptorProto {
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for _, field := range msg.GetField() {
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if field.GetName() == fieldName {
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return field
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}
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}
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return nil
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}
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func (desc *FileDescriptorSet) GetEnum(packageName string, typeName string) *EnumDescriptorProto {
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for _, file := range desc.GetFile() {
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if strings.Map(dotToUnderscore, file.GetPackage()) != strings.Map(dotToUnderscore, packageName) {
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continue
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}
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for _, enum := range file.GetEnumType() {
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if enum.GetName() == typeName {
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return enum
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}
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}
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}
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return nil
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}
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func (f *FieldDescriptorProto) IsEnum() bool {
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return *f.Type == FieldDescriptorProto_TYPE_ENUM
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}
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func (f *FieldDescriptorProto) IsMessage() bool {
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return *f.Type == FieldDescriptorProto_TYPE_MESSAGE
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}
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func (f *FieldDescriptorProto) IsBytes() bool {
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return *f.Type == FieldDescriptorProto_TYPE_BYTES
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}
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func (f *FieldDescriptorProto) IsRepeated() bool {
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return f.Label != nil && *f.Label == FieldDescriptorProto_LABEL_REPEATED
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}
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func (f *FieldDescriptorProto) IsString() bool {
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return *f.Type == FieldDescriptorProto_TYPE_STRING
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}
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func (f *FieldDescriptorProto) IsBool() bool {
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return *f.Type == FieldDescriptorProto_TYPE_BOOL
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}
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func (f *FieldDescriptorProto) IsRequired() bool {
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return f.Label != nil && *f.Label == FieldDescriptorProto_LABEL_REQUIRED
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}
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func (f *FieldDescriptorProto) IsPacked() bool {
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return f.Options != nil && f.GetOptions().GetPacked()
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}
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func (f *FieldDescriptorProto) IsPacked3() bool {
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if f.IsRepeated() && f.IsScalar() {
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if f.Options == nil || f.GetOptions().Packed == nil {
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return true
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}
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return f.Options != nil && f.GetOptions().GetPacked()
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}
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return false
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}
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func (m *DescriptorProto) HasExtension() bool {
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return len(m.ExtensionRange) > 0
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}
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