mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-18 19:44:06 -08:00
581 lines
15 KiB
Go
581 lines
15 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 compare
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import (
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"github.com/gogo/protobuf/gogoproto"
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"github.com/gogo/protobuf/proto"
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descriptor "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
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"github.com/gogo/protobuf/protoc-gen-gogo/generator"
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"github.com/gogo/protobuf/vanity"
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)
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type plugin struct {
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*generator.Generator
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generator.PluginImports
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fmtPkg generator.Single
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bytesPkg generator.Single
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sortkeysPkg generator.Single
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protoPkg generator.Single
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}
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func NewPlugin() *plugin {
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return &plugin{}
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}
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func (p *plugin) Name() string {
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return "compare"
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}
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func (p *plugin) Init(g *generator.Generator) {
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p.Generator = g
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}
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func (p *plugin) Generate(file *generator.FileDescriptor) {
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p.PluginImports = generator.NewPluginImports(p.Generator)
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p.fmtPkg = p.NewImport("fmt")
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p.bytesPkg = p.NewImport("bytes")
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p.sortkeysPkg = p.NewImport("github.com/gogo/protobuf/sortkeys")
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p.protoPkg = p.NewImport("github.com/gogo/protobuf/proto")
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for _, msg := range file.Messages() {
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if msg.DescriptorProto.GetOptions().GetMapEntry() {
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continue
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}
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if gogoproto.HasCompare(file.FileDescriptorProto, msg.DescriptorProto) {
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p.generateMessage(file, msg)
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}
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}
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}
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func (p *plugin) generateNullableField(fieldname string) {
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p.P(`if this.`, fieldname, ` != nil && that1.`, fieldname, ` != nil {`)
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p.In()
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p.P(`if *this.`, fieldname, ` != *that1.`, fieldname, `{`)
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p.In()
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p.P(`if *this.`, fieldname, ` < *that1.`, fieldname, `{`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`} else if this.`, fieldname, ` != nil {`)
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p.In()
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p.P(`return 1`)
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p.Out()
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p.P(`} else if that1.`, fieldname, ` != nil {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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}
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func (p *plugin) generateMsgNullAndTypeCheck(ccTypeName string) {
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p.P(`if that == nil {`)
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p.In()
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p.P(`if this == nil {`)
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p.In()
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p.P(`return 0`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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p.P(``)
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p.P(`that1, ok := that.(*`, ccTypeName, `)`)
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p.P(`if !ok {`)
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p.In()
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p.P(`that2, ok := that.(`, ccTypeName, `)`)
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p.P(`if ok {`)
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p.In()
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p.P(`that1 = &that2`)
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p.Out()
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p.P(`} else {`)
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p.In()
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`}`)
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p.P(`if that1 == nil {`)
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p.In()
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p.P(`if this == nil {`)
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p.In()
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p.P(`return 0`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`} else if this == nil {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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}
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func (p *plugin) generateField(file *generator.FileDescriptor, message *generator.Descriptor, field *descriptor.FieldDescriptorProto) {
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proto3 := gogoproto.IsProto3(file.FileDescriptorProto)
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fieldname := p.GetOneOfFieldName(message, field)
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repeated := field.IsRepeated()
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ctype := gogoproto.IsCustomType(field)
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nullable := gogoproto.IsNullable(field)
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// oneof := field.OneofIndex != nil
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if !repeated {
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if ctype {
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if nullable {
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p.P(`if that1.`, fieldname, ` == nil {`)
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p.In()
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p.P(`if this.`, fieldname, ` != nil {`)
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p.In()
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`} else if this.`, fieldname, ` == nil {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`} else if c := this.`, fieldname, `.Compare(*that1.`, fieldname, `); c != 0 {`)
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} else {
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p.P(`if c := this.`, fieldname, `.Compare(that1.`, fieldname, `); c != 0 {`)
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}
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p.In()
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p.P(`return c`)
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p.Out()
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p.P(`}`)
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} else {
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if field.IsMessage() || p.IsGroup(field) {
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if nullable {
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p.P(`if c := this.`, fieldname, `.Compare(that1.`, fieldname, `); c != 0 {`)
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} else {
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p.P(`if c := this.`, fieldname, `.Compare(&that1.`, fieldname, `); c != 0 {`)
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}
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p.In()
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p.P(`return c`)
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p.Out()
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p.P(`}`)
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} else if field.IsBytes() {
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p.P(`if c := `, p.bytesPkg.Use(), `.Compare(this.`, fieldname, `, that1.`, fieldname, `); c != 0 {`)
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p.In()
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p.P(`return c`)
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p.Out()
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p.P(`}`)
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} else if field.IsString() {
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if nullable && !proto3 {
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p.generateNullableField(fieldname)
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} else {
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p.P(`if this.`, fieldname, ` != that1.`, fieldname, `{`)
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p.In()
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p.P(`if this.`, fieldname, ` < that1.`, fieldname, `{`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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}
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} else if field.IsBool() {
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if nullable && !proto3 {
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p.P(`if this.`, fieldname, ` != nil && that1.`, fieldname, ` != nil {`)
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p.In()
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p.P(`if *this.`, fieldname, ` != *that1.`, fieldname, `{`)
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p.In()
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p.P(`if !*this.`, fieldname, ` {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`} else if this.`, fieldname, ` != nil {`)
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p.In()
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p.P(`return 1`)
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p.Out()
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p.P(`} else if that1.`, fieldname, ` != nil {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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} else {
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p.P(`if this.`, fieldname, ` != that1.`, fieldname, `{`)
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p.In()
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p.P(`if !this.`, fieldname, ` {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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}
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} else {
|
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if nullable && !proto3 {
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p.generateNullableField(fieldname)
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|
} else {
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p.P(`if this.`, fieldname, ` != that1.`, fieldname, `{`)
|
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p.In()
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p.P(`if this.`, fieldname, ` < that1.`, fieldname, `{`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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p.P(`return 1`)
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p.Out()
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p.P(`}`)
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}
|
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}
|
|
}
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|
} else {
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p.P(`if len(this.`, fieldname, `) != len(that1.`, fieldname, `) {`)
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|
p.In()
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p.P(`if len(this.`, fieldname, `) < len(that1.`, fieldname, `) {`)
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p.In()
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p.P(`return -1`)
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p.Out()
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p.P(`}`)
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|
p.P(`return 1`)
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|
p.Out()
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p.P(`}`)
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|
p.P(`for i := range this.`, fieldname, ` {`)
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|
p.In()
|
|
if ctype {
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|
p.P(`if c := this.`, fieldname, `[i].Compare(that1.`, fieldname, `[i]); c != 0 {`)
|
|
p.In()
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|
p.P(`return c`)
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|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
if p.IsMap(field) {
|
|
m := p.GoMapType(nil, field)
|
|
valuegoTyp, _ := p.GoType(nil, m.ValueField)
|
|
valuegoAliasTyp, _ := p.GoType(nil, m.ValueAliasField)
|
|
nullable, valuegoTyp, valuegoAliasTyp = generator.GoMapValueTypes(field, m.ValueField, valuegoTyp, valuegoAliasTyp)
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|
|
|
mapValue := m.ValueAliasField
|
|
if mapValue.IsMessage() || p.IsGroup(mapValue) {
|
|
if nullable && valuegoTyp == valuegoAliasTyp {
|
|
p.P(`if c := this.`, fieldname, `[i].Compare(that1.`, fieldname, `[i]); c != 0 {`)
|
|
} else {
|
|
// Compare() has a pointer receiver, but map value is a value type
|
|
a := `this.` + fieldname + `[i]`
|
|
b := `that1.` + fieldname + `[i]`
|
|
if valuegoTyp != valuegoAliasTyp {
|
|
// cast back to the type that has the generated methods on it
|
|
a = `(` + valuegoTyp + `)(` + a + `)`
|
|
b = `(` + valuegoTyp + `)(` + b + `)`
|
|
}
|
|
p.P(`a := `, a)
|
|
p.P(`b := `, b)
|
|
if nullable {
|
|
p.P(`if c := a.Compare(b); c != 0 {`)
|
|
} else {
|
|
p.P(`if c := (&a).Compare(&b); c != 0 {`)
|
|
}
|
|
}
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else if mapValue.IsBytes() {
|
|
p.P(`if c := `, p.bytesPkg.Use(), `.Compare(this.`, fieldname, `[i], that1.`, fieldname, `[i]); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else if mapValue.IsString() {
|
|
p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`if this.`, fieldname, `[i] < that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`if this.`, fieldname, `[i] < that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
} else if field.IsMessage() || p.IsGroup(field) {
|
|
if nullable {
|
|
p.P(`if c := this.`, fieldname, `[i].Compare(that1.`, fieldname, `[i]); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
p.P(`if c := this.`, fieldname, `[i].Compare(&that1.`, fieldname, `[i]); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
} else if field.IsBytes() {
|
|
p.P(`if c := `, p.bytesPkg.Use(), `.Compare(this.`, fieldname, `[i], that1.`, fieldname, `[i]); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else if field.IsString() {
|
|
p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`if this.`, fieldname, `[i] < that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else if field.IsBool() {
|
|
p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`if !this.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`if this.`, fieldname, `[i] < that1.`, fieldname, `[i] {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
}
|
|
|
|
func (p *plugin) generateMessage(file *generator.FileDescriptor, message *generator.Descriptor) {
|
|
ccTypeName := generator.CamelCaseSlice(message.TypeName())
|
|
p.P(`func (this *`, ccTypeName, `) Compare(that interface{}) int {`)
|
|
p.In()
|
|
p.generateMsgNullAndTypeCheck(ccTypeName)
|
|
oneofs := make(map[string]struct{})
|
|
|
|
for _, field := range message.Field {
|
|
oneof := field.OneofIndex != nil
|
|
if oneof {
|
|
fieldname := p.GetFieldName(message, field)
|
|
if _, ok := oneofs[fieldname]; ok {
|
|
continue
|
|
} else {
|
|
oneofs[fieldname] = struct{}{}
|
|
}
|
|
p.P(`if that1.`, fieldname, ` == nil {`)
|
|
p.In()
|
|
p.P(`if this.`, fieldname, ` != nil {`)
|
|
p.In()
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`} else if this.`, fieldname, ` == nil {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`} else {`)
|
|
p.In()
|
|
|
|
// Generate two type switches in order to compare the
|
|
// types of the oneofs. If they are of the same type
|
|
// call Compare, otherwise return 1 or -1.
|
|
p.P(`thisType := -1`)
|
|
p.P(`switch this.`, fieldname, `.(type) {`)
|
|
for i, subfield := range message.Field {
|
|
if *subfield.OneofIndex == *field.OneofIndex {
|
|
ccTypeName := p.OneOfTypeName(message, subfield)
|
|
p.P(`case *`, ccTypeName, `:`)
|
|
p.In()
|
|
p.P(`thisType = `, i)
|
|
p.Out()
|
|
}
|
|
}
|
|
p.P(`default:`)
|
|
p.In()
|
|
p.P(`panic(fmt.Sprintf("compare: unexpected type %T in oneof", this.`, fieldname, `))`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
|
|
p.P(`that1Type := -1`)
|
|
p.P(`switch that1.`, fieldname, `.(type) {`)
|
|
for i, subfield := range message.Field {
|
|
if *subfield.OneofIndex == *field.OneofIndex {
|
|
ccTypeName := p.OneOfTypeName(message, subfield)
|
|
p.P(`case *`, ccTypeName, `:`)
|
|
p.In()
|
|
p.P(`that1Type = `, i)
|
|
p.Out()
|
|
}
|
|
}
|
|
p.P(`default:`)
|
|
p.In()
|
|
p.P(`panic(fmt.Sprintf("compare: unexpected type %T in oneof", that1.`, fieldname, `))`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
|
|
p.P(`if thisType == that1Type {`)
|
|
p.In()
|
|
p.P(`if c := this.`, fieldname, `.Compare(that1.`, fieldname, `); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`} else if thisType < that1Type {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`} else if thisType > that1Type {`)
|
|
p.In()
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
p.generateField(file, message, field)
|
|
}
|
|
}
|
|
if message.DescriptorProto.HasExtension() {
|
|
if gogoproto.HasExtensionsMap(file.FileDescriptorProto, message.DescriptorProto) {
|
|
p.P(`thismap := `, p.protoPkg.Use(), `.GetUnsafeExtensionsMap(this)`)
|
|
p.P(`thatmap := `, p.protoPkg.Use(), `.GetUnsafeExtensionsMap(that1)`)
|
|
p.P(`extkeys := make([]int32, 0, len(thismap)+len(thatmap))`)
|
|
p.P(`for k, _ := range thismap {`)
|
|
p.In()
|
|
p.P(`extkeys = append(extkeys, k)`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(`for k, _ := range thatmap {`)
|
|
p.In()
|
|
p.P(`if _, ok := thismap[k]; !ok {`)
|
|
p.In()
|
|
p.P(`extkeys = append(extkeys, k)`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.P(p.sortkeysPkg.Use(), `.Int32s(extkeys)`)
|
|
p.P(`for _, k := range extkeys {`)
|
|
p.In()
|
|
p.P(`if v, ok := thismap[k]; ok {`)
|
|
p.In()
|
|
p.P(`if v2, ok := thatmap[k]; ok {`)
|
|
p.In()
|
|
p.P(`if c := v.Compare(&v2); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`} else {`)
|
|
p.In()
|
|
p.P(`return 1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`} else {`)
|
|
p.In()
|
|
p.P(`return -1`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
fieldname := "XXX_extensions"
|
|
p.P(`if c := `, p.bytesPkg.Use(), `.Compare(this.`, fieldname, `, that1.`, fieldname, `); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
}
|
|
if gogoproto.HasUnrecognized(file.FileDescriptorProto, message.DescriptorProto) {
|
|
fieldname := "XXX_unrecognized"
|
|
p.P(`if c := `, p.bytesPkg.Use(), `.Compare(this.`, fieldname, `, that1.`, fieldname, `); c != 0 {`)
|
|
p.In()
|
|
p.P(`return c`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
p.P(`return 0`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
|
|
//Generate Compare methods for oneof fields
|
|
m := proto.Clone(message.DescriptorProto).(*descriptor.DescriptorProto)
|
|
for _, field := range m.Field {
|
|
oneof := field.OneofIndex != nil
|
|
if !oneof {
|
|
continue
|
|
}
|
|
ccTypeName := p.OneOfTypeName(message, field)
|
|
p.P(`func (this *`, ccTypeName, `) Compare(that interface{}) int {`)
|
|
p.In()
|
|
|
|
p.generateMsgNullAndTypeCheck(ccTypeName)
|
|
vanity.TurnOffNullableForNativeTypes(field)
|
|
p.generateField(file, message, field)
|
|
|
|
p.P(`return 0`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
}
|
|
|
|
func init() {
|
|
generator.RegisterPlugin(NewPlugin())
|
|
}
|