258 lines
8.4 KiB
Go
258 lines
8.4 KiB
Go
package main
|
|
|
|
import (
|
|
"sort"
|
|
"strings"
|
|
|
|
"google.golang.org/protobuf/compiler/protogen"
|
|
"google.golang.org/protobuf/reflect/protoreflect"
|
|
)
|
|
|
|
var (
|
|
protowirePackage = protogen.GoImportPath("google.golang.org/protobuf/encoding/protowire")
|
|
binaryPackage = protogen.GoImportPath("encoding/binary")
|
|
)
|
|
|
|
func main() {
|
|
protogen.Options{}.Run(func(gen *protogen.Plugin) error {
|
|
for _, f := range gen.Files {
|
|
if f.Generate {
|
|
generateFile(gen, f)
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// generateFile generates a *.pb.go file enforcing field-order serialization.
|
|
func generateFile(gen *protogen.Plugin, file *protogen.File) *protogen.GeneratedFile {
|
|
filename := file.GeneratedFilenamePrefix + "_frostfs.pb.go"
|
|
g := gen.NewGeneratedFile(filename, file.GoImportPath)
|
|
g.P("// Code generated by protoc-gen-go-frostfs. DO NOT EDIT.")
|
|
g.P()
|
|
g.P("package ", file.GoPackageName)
|
|
g.P()
|
|
g.P(`import "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/proto"`)
|
|
|
|
//for _, e := range file.Enums {
|
|
// g.P("type " + e.GoIdent.GoName + " int32")
|
|
// g.P("const (")
|
|
// for _, ev := range e.Values {
|
|
// g.P(ev.GoIdent.GoName, " = ", ev.Desc.Number())
|
|
// }
|
|
// g.P(")")
|
|
//}
|
|
for _, msg := range file.Messages {
|
|
emitMessage(g, msg)
|
|
}
|
|
return g
|
|
}
|
|
|
|
func emitMessage(g *protogen.GeneratedFile, msg *protogen.Message) {
|
|
for _, inner := range msg.Messages {
|
|
emitMessage(g, inner)
|
|
}
|
|
|
|
fs := sortFields(msg.Fields)
|
|
|
|
// StableSize implementation.
|
|
g.P("// StableSize returns the size of x in protobuf format.")
|
|
g.P("//")
|
|
g.P("// Structures with the same field values have the same binary size.")
|
|
g.P("func (x *", msg.GoIdent.GoName, ") StableSize() (size int) {")
|
|
g.P("if x == nil { return 0 }")
|
|
if len(fs) != 0 {
|
|
for _, f := range fs {
|
|
if f.Desc.IsList() && marshalers[f.Desc.Kind()].RepeatedDouble && !(f.Desc.Kind() == protoreflect.Uint64Kind && !f.Desc.IsPacked()) {
|
|
g.P("var n int")
|
|
break
|
|
}
|
|
}
|
|
for _, f := range fs {
|
|
emitFieldSize(g, f)
|
|
}
|
|
}
|
|
g.P("return size")
|
|
g.P("}\n")
|
|
|
|
// StableMarshal implementation.
|
|
g.P("// StableMarshal marshals x in protobuf binary format with stable field order.")
|
|
g.P("//")
|
|
g.P("// If buffer length is less than x.StableSize(), new buffer is allocated.")
|
|
g.P("//")
|
|
g.P("// Returns any error encountered which did not allow writing the data completely.")
|
|
g.P("// Otherwise, returns the buffer in which the data is written.")
|
|
g.P("//")
|
|
g.P("// Structures with the same field values have the same binary format.")
|
|
g.P("func (x *", msg.GoIdent.GoName, ") StableMarshal(buf []byte) []byte {")
|
|
if len(fs) != 0 {
|
|
g.P("if x == nil { return []byte{} }")
|
|
g.P("if buf == nil { buf = make([]byte, x.StableSize()) }")
|
|
g.P("var offset int")
|
|
for _, f := range fs {
|
|
emitFieldMarshal(g, f)
|
|
}
|
|
}
|
|
g.P("return buf")
|
|
g.P("}\n")
|
|
|
|
if strings.HasSuffix(msg.GoIdent.GoName, "Request") || strings.HasSuffix(msg.GoIdent.GoName, "Response") {
|
|
// SignedDataSize implementation (only for requests and responses).
|
|
g.P("// ReadSignedData fills buf with signed data of x.")
|
|
g.P("// If buffer length is less than x.SignedDataSize(), new buffer is allocated.")
|
|
g.P("//")
|
|
g.P("// Returns any error encountered which did not allow writing the data completely.")
|
|
g.P("// Otherwise, returns the buffer in which the data is written.")
|
|
g.P("//")
|
|
g.P("// Structures with the same field values have the same signed data.")
|
|
g.P("func (x *", msg.GoIdent.GoName, ") SignedDataSize() int {")
|
|
g.P("return x.GetBody().StableSize()")
|
|
g.P("}\n")
|
|
|
|
// ReadSignedData implementation (only for requests and responses).
|
|
g.P("// SignedDataSize returns size of the request signed data in bytes.")
|
|
g.P("//")
|
|
g.P("// Structures with the same field values have the same signed data size.")
|
|
g.P("func (x *", msg.GoIdent.GoName, ") ReadSignedData(buf []byte) ([]byte, error) {")
|
|
g.P("return x.GetBody().StableMarshal(buf), nil")
|
|
g.P("}\n")
|
|
|
|
// Signature setters and getters.
|
|
g.P("func (x *", msg.GoIdent.GoName, ") SetSignature(sig *Signature) {")
|
|
g.P("x.Signature = sig")
|
|
g.P("}\n")
|
|
}
|
|
}
|
|
|
|
func emitFieldSize(g *protogen.GeneratedFile, f *protogen.Field) {
|
|
m := marshalers[f.Desc.Kind()]
|
|
if m.Prefix == "" {
|
|
g.P("// FIXME missing field marshaler: ", f.GoName, " of type ", f.Desc.Kind().String())
|
|
g.P(`panic("unimplemented")`)
|
|
return
|
|
}
|
|
|
|
name := castFieldName(f)
|
|
if f.Oneof != nil {
|
|
name = "x." + f.Oneof.GoName
|
|
g.P("if inner, ok := ", name, ".(*", f.GoIdent.GoName, "); ok {")
|
|
defer g.P("}")
|
|
name = "inner." + f.GoName
|
|
}
|
|
|
|
switch {
|
|
case f.Desc.IsList() && (f.Desc.Kind() == protoreflect.MessageKind || f.Desc.Kind() == protoreflect.Uint64Kind && !f.Desc.IsPacked()):
|
|
g.P("for i := range ", name, "{")
|
|
if f.Desc.Kind() == protoreflect.MessageKind {
|
|
g.P("size += proto.NestedStructureSize(", f.Desc.Number(), ", ", name, "[i])")
|
|
} else {
|
|
if f.Desc.Kind() != protoreflect.Uint64Kind {
|
|
panic("only uint64 unpacked primitive is supported")
|
|
}
|
|
|
|
g.P("size += ", protowirePackage.Ident("SizeGroup"), "(",
|
|
protowirePackage.Ident("Number"), "(", f.Desc.Number(), "), ",
|
|
protowirePackage.Ident("SizeVarint"), "(", name, "[i]))")
|
|
}
|
|
g.P("}")
|
|
case f.Desc.IsList():
|
|
if m.RepeatedDouble {
|
|
g.P("n, _ = proto.Repeated", m.Prefix, "Size(", f.Desc.Number(), ", ", name, ")")
|
|
g.P("size += n")
|
|
} else {
|
|
g.P("size += proto.Repeated", m.Prefix, "Size(", f.Desc.Number(), ", ", name, ")")
|
|
}
|
|
default:
|
|
g.P("size += proto.", m.Prefix, "Size(", f.Desc.Number(), ", ", name, ")")
|
|
}
|
|
}
|
|
|
|
func emitFieldMarshal(g *protogen.GeneratedFile, f *protogen.Field) {
|
|
m := marshalers[f.Desc.Kind()]
|
|
if m.Prefix == "" {
|
|
g.P("// FIXME missing field marshaler: ", f.GoName, " of type ", f.Desc.Kind().String())
|
|
g.P(`panic("unimplemented")`)
|
|
return
|
|
}
|
|
|
|
name := castFieldName(f)
|
|
if f.Oneof != nil {
|
|
name = "x." + f.Oneof.GoName
|
|
g.P("if inner, ok := ", name, ".(*", f.GoIdent.GoName, "); ok {")
|
|
defer g.P("}")
|
|
name = "inner." + f.GoName
|
|
}
|
|
|
|
prefix := m.Prefix
|
|
if f.Desc.IsList() {
|
|
prefix = "Repeated" + m.Prefix
|
|
}
|
|
switch {
|
|
case f.Desc.IsList() && (f.Desc.Kind() == protoreflect.MessageKind || f.Desc.Kind() == protoreflect.Uint64Kind && !f.Desc.IsPacked()):
|
|
g.P("for i := range ", name, "{")
|
|
if f.Desc.Kind() == protoreflect.MessageKind {
|
|
g.P("offset += proto.NestedStructureMarshal(", f.Desc.Number(), ", buf[offset:], ", name, "[i])")
|
|
} else {
|
|
if f.Desc.Kind() != protoreflect.Uint64Kind {
|
|
panic("only uint64 unpacked primitive is supported")
|
|
}
|
|
g.P("{")
|
|
g.P("prefix := ", protowirePackage.Ident("EncodeTag"), "(",
|
|
protowirePackage.Ident("Number"), "(", f.Desc.Number(), "), ",
|
|
protowirePackage.Ident("VarintType"), ")")
|
|
g.P("offset += ", binaryPackage.Ident("PutUvarint"), "(buf[offset:], uint64(prefix))")
|
|
g.P("offset += ", binaryPackage.Ident("PutUvarint"), "(buf[offset:], ", name, "[i])")
|
|
g.P("}")
|
|
}
|
|
g.P("}")
|
|
case f.Desc.IsList():
|
|
g.P("offset += proto.Repeated", m.Prefix, "Marshal(", f.Desc.Number(), ", buf[offset:], ", name, ")")
|
|
default:
|
|
g.P("offset += proto.", prefix, "Marshal(", f.Desc.Number(), ", buf[offset:], ", name, ")")
|
|
}
|
|
}
|
|
|
|
func castFieldName(f *protogen.Field) string {
|
|
name := "x." + f.GoName
|
|
if f.Desc.Kind() != protoreflect.EnumKind {
|
|
return name
|
|
}
|
|
return "int32(" + name + ")"
|
|
}
|
|
|
|
type marshalerDesc struct {
|
|
Prefix string
|
|
RepeatedDouble bool
|
|
}
|
|
|
|
// Unused kinds are commented.
|
|
var marshalers = map[protoreflect.Kind]marshalerDesc{
|
|
protoreflect.BoolKind: {Prefix: "Bool"},
|
|
protoreflect.EnumKind: {Prefix: "Enum"},
|
|
|
|
protoreflect.Int32Kind: {Prefix: "Int32", RepeatedDouble: true},
|
|
// protoreflect.Sint32Kind: "",
|
|
protoreflect.Uint32Kind: {Prefix: "UInt32", RepeatedDouble: true},
|
|
protoreflect.Int64Kind: {Prefix: "Int64", RepeatedDouble: true},
|
|
// protoreflect.Sint64Kind: "",
|
|
protoreflect.Uint64Kind: {Prefix: "UInt64", RepeatedDouble: true},
|
|
// protoreflect.Sfixed32Kind: "",
|
|
protoreflect.Fixed32Kind: {Prefix: "Fixed32", RepeatedDouble: true},
|
|
// protoreflect.FloatKind: "",
|
|
// protoreflect.Sfixed64Kind: "",
|
|
protoreflect.Fixed64Kind: {Prefix: "Fixed64", RepeatedDouble: true},
|
|
protoreflect.DoubleKind: {Prefix: "Float64"},
|
|
protoreflect.StringKind: {Prefix: "String"},
|
|
protoreflect.BytesKind: {Prefix: "Bytes"},
|
|
protoreflect.MessageKind: {Prefix: "NestedStructure"},
|
|
// protoreflect.GroupKind: "",
|
|
}
|
|
|
|
func sortFields(fs []*protogen.Field) []*protogen.Field {
|
|
res := make([]*protogen.Field, len(fs))
|
|
copy(res, fs)
|
|
sort.Slice(res, func(i, j int) bool {
|
|
return res[i].Desc.Number() < res[j].Desc.Number()
|
|
})
|
|
return res
|
|
}
|