Add proto2 to proto3 util

6 files changed, 311 insertions, 39 deletions

diff --git a/benchmarks/util/data_proto2_to_proto3_util.h b/benchmarks/util/data_proto2_to_proto3_util.h
new file mode 100644
index 00000000..7207efde
--- /dev/null
+++ b/benchmarks/util/data_proto2_to_proto3_util.h
@@ -0,0 +1,63 @@
+#ifndef PROTOBUF_BENCHMARKS_UTIL_DATA_PROTO2_TO_PROTO3_UTIL_H_
+#define PROTOBUF_BENCHMARKS_UTIL_DATA_PROTO2_TO_PROTO3_UTIL_H_
+
+#include "google/protobuf/message.h"
+#include "google/protobuf/descriptor.h"
+
+using google::protobuf::FieldDescriptor;
+using google::protobuf::Message;
+using google::protobuf::Reflection;
+
+namespace google {
+namespace protobuf {
+namespace util {
+
+class DataStripper {
+ public:
+  void StripMessage(Message *message) {
+    std::vector<const FieldDescriptor*> set_fields;
+    const Reflection* reflection = message->GetReflection();
+    reflection->ListFields(*message, &set_fields);
+
+    for (size_t i = 0; i < set_fields.size(); i++) {
+      const FieldDescriptor* field = set_fields[i];
+      if (ShouldBeClear(field)) {
+        reflection->ClearField(message, field);
+      }
+      if (field->type() == FieldDescriptor::TYPE_MESSAGE) {
+        if (field->is_repeated()) {
+          for (int j = 0; j < reflection->FieldSize(*message, field); j++) {
+            StripMessage(reflection->MutableRepeatedMessage(message, field, j));
+          }
+        } else {
+          StripMessage(reflection->MutableMessage(message, field));
+        }
+      }
+    }
+
+    reflection->MutableUnknownFields(message)->Clear();
+  }
+ private:
+  virtual bool ShouldBeClear(const FieldDescriptor *field) = 0;
+};
+
+class GogoDataStripper : public DataStripper {
+ private:
+  virtual bool ShouldBeClear(const FieldDescriptor *field) {
+    return field->type() == FieldDescriptor::TYPE_GROUP;
+  }
+};
+
+class Proto3DataStripper : public DataStripper {
+ private:
+  virtual bool ShouldBeClear(const FieldDescriptor *field) {
+    return field->type() == FieldDescriptor::TYPE_GROUP ||
+           field->is_extension();
+  }
+};
+
+}  // namespace util
+}  // namespace protobuf
+}  // namespace google
+
+#endif  // PROTOBUF_BENCHMARKS_UTIL_DATA_PROTO2_TO_PROTO3_UTIL_H_
diff --git a/benchmarks/util/gogo_data_scrubber.cc b/benchmarks/util/gogo_data_scrubber.cc
index fb9af6e2..9ef57b0d 100644
--- a/benchmarks/util/gogo_data_scrubber.cc
+++ b/benchmarks/util/gogo_data_scrubber.cc
@@ -4,43 +4,11 @@
 #include "datasets/google_message2/benchmark_message2.pb.h"
 #include "datasets/google_message3/benchmark_message3.pb.h"
 #include "datasets/google_message4/benchmark_message4.pb.h"
-
-#include "google/protobuf/message.h"
-#include "google/protobuf/descriptor.h"
+#include "data_proto2_to_proto3_util.h"
 
 #include <fstream>
 
-using google::protobuf::FieldDescriptor;
-using google::protobuf::Message;
-using google::protobuf::Reflection;
-
-
-class DataGroupStripper {
- public:
-  static void StripMessage(Message *message) {
-    std::vector<const FieldDescriptor*> set_fields;
-    const Reflection* reflection = message->GetReflection();
-    reflection->ListFields(*message, &set_fields);
-
-    for (size_t i = 0; i < set_fields.size(); i++) {
-      const FieldDescriptor* field = set_fields[i];
-      if (field->type() == FieldDescriptor::TYPE_GROUP) {
-        reflection->ClearField(message, field);
-      }
-      if (field->type() == FieldDescriptor::TYPE_MESSAGE) {
-        if (field->is_repeated()) {
-          for (int j = 0; j < reflection->FieldSize(*message, field); j++) {
-            StripMessage(reflection->MutableRepeatedMessage(message, field, j));
-          }
-        } else {
-          StripMessage(reflection->MutableMessage(message, field));
-        }
-      }
-    }
-
-    reflection->MutableUnknownFields(message)->Clear();
-  }
-};
+using google::protobuf::util::GogoDataStripper;
 
 std::string ReadFile(const std::string& name) {
   std::ifstream file(name.c_str());
@@ -91,7 +59,8 @@ int main(int argc, char *argv[]) {
 
     for (int i = 0; i < dataset.payload_size(); i++) {
       message->ParseFromString(dataset.payload(i));
-      DataGroupStripper::StripMessage(message);
+      GogoDataStripper stripper;
+      stripper.StripMessage(message);
       dataset.set_payload(i, message->SerializeAsString());
     }
 
diff --git a/benchmarks/util/proto3_data_stripper.cc b/benchmarks/util/proto3_data_stripper.cc
new file mode 100644
index 00000000..3096c4c1
--- /dev/null
+++ b/benchmarks/util/proto3_data_stripper.cc
@@ -0,0 +1,74 @@
+#include "benchmarks.pb.h"
+#include "datasets/google_message1/proto2/benchmark_message1_proto2.pb.h"
+#include "datasets/google_message1/proto3/benchmark_message1_proto3.pb.h"
+#include "datasets/google_message2/benchmark_message2.pb.h"
+#include "datasets/google_message3/benchmark_message3.pb.h"
+#include "datasets/google_message4/benchmark_message4.pb.h"
+#include "data_proto2_to_proto3_util.h"
+
+#include <fstream>
+
+using google::protobuf::util::Proto3DataStripper;
+
+std::string ReadFile(const std::string& name) {
+  std::ifstream file(name.c_str());
+  GOOGLE_CHECK(file.is_open()) << "Couldn't find file '"
+      << name
+      << "', please make sure you are running this command from the benchmarks"
+      << " directory.\n";
+  return std::string((std::istreambuf_iterator<char>(file)),
+                     std::istreambuf_iterator<char>());
+}
+
+int main(int argc, char *argv[]) {
+  if (argc % 2 == 0 || argc == 1) {
+    std::cerr << "Usage: [input_files] [output_file_names] where " <<
+        "input_files are one to one mapping to output_file_names." <<
+        std::endl;
+    return 1;
+  }
+
+  for (int i = argc / 2; i > 0; i--) {
+    const std::string &input_file = argv[i];
+    const std::string &output_file = argv[i + argc / 2];
+
+    std::cerr << "Generating " << input_file
+        << " to " << output_file << std::endl;
+    benchmarks::BenchmarkDataset dataset;
+    Message* message;
+    std::string dataset_payload = ReadFile(input_file);
+    GOOGLE_CHECK(dataset.ParseFromString(dataset_payload))
+      << "Can' t parse data file " << input_file;
+
+    if (dataset.message_name() == "benchmarks.proto3.GoogleMessage1") {
+      message = new benchmarks::proto3::GoogleMessage1;
+    } else if (dataset.message_name() == "benchmarks.proto2.GoogleMessage1") {
+      message = new benchmarks::proto2::GoogleMessage1;
+    } else if (dataset.message_name() == "benchmarks.proto2.GoogleMessage2") {
+      message = new benchmarks::proto2::GoogleMessage2;
+    } else if (dataset.message_name() ==
+        "benchmarks.google_message3.GoogleMessage3") {
+      message = new benchmarks::google_message3::GoogleMessage3;
+    } else if (dataset.message_name() ==
+        "benchmarks.google_message4.GoogleMessage4") {
+      message = new benchmarks::google_message4::GoogleMessage4;
+    } else {
+      std::cerr << "Unknown message type: " << dataset.message_name();
+      exit(1);
+    }
+
+    for (int i = 0; i < dataset.payload_size(); i++) {
+      message->ParseFromString(dataset.payload(i));
+      Proto3DataStripper stripper;
+      stripper.StripMessage(message);
+      dataset.set_payload(i, message->SerializeAsString());
+    }
+
+    std::ofstream ofs(output_file);
+    ofs << dataset.SerializeAsString();
+    ofs.close();
+  }
+
+
+  return 0;
+}
diff --git a/benchmarks/util/protoc-gen-gogoproto.cc b/benchmarks/util/protoc-gen-gogoproto.cc
index bfa6a5e5..9c1b3d04 100644
--- a/benchmarks/util/protoc-gen-gogoproto.cc
+++ b/benchmarks/util/protoc-gen-gogoproto.cc
@@ -12,7 +12,7 @@ using google::protobuf::FileDescriptor;
 using google::protobuf::DescriptorPool;
 using google::protobuf::io::Printer;
 using google::protobuf::util::SchemaGroupStripper;
-using google::protobuf::util::SchemaAddZeroEnumValue;
+using google::protobuf::util::EnumScrubber;
 
 namespace google {
 namespace protobuf {
@@ -74,7 +74,7 @@ class GoGoProtoGenerator : public CodeGenerator {
     file->CopyTo(&new_file);
     SchemaGroupStripper::StripFile(file, &new_file);
 
-    SchemaAddZeroEnumValue enum_scrubber;
+    EnumScrubber enum_scrubber;
     enum_scrubber.ScrubFile(&new_file);
 
     string filename = file->name();
diff --git a/benchmarks/util/protoc-gen-proto2_to_proto3.cc b/benchmarks/util/protoc-gen-proto2_to_proto3.cc
new file mode 100644
index 00000000..b1e6ba41
--- /dev/null
+++ b/benchmarks/util/protoc-gen-proto2_to_proto3.cc
@@ -0,0 +1,108 @@
+#include "google/protobuf/compiler/code_generator.h"
+#include "google/protobuf/io/zero_copy_stream.h"
+#include "google/protobuf/io/printer.h"
+#include "google/protobuf/descriptor.h"
+#include "google/protobuf/descriptor.pb.h"
+#include "schema_proto2_to_proto3_util.h"
+
+#include "google/protobuf/compiler/plugin.h"
+
+using google::protobuf::FileDescriptorProto;
+using google::protobuf::FileDescriptor;
+using google::protobuf::DescriptorPool;
+using google::protobuf::io::Printer;
+using google::protobuf::util::SchemaGroupStripper;
+using google::protobuf::util::EnumScrubber;
+using google::protobuf::util::ExtensionStripper;
+using google::protobuf::util::FieldScrubber;
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+
+namespace {
+
+string StripProto(string filename) {
+  if (filename.substr(filename.size() - 11) == ".protodevel") {
+    // .protodevel
+    return filename.substr(0, filename.size() - 11);
+  } else {
+    // .proto
+    return filename.substr(0, filename.size() - 6);
+  }
+}
+
+DescriptorPool new_pool_;
+
+}  // namespace
+
+class Proto2ToProto3Generator : public CodeGenerator {
+ public:
+  virtual bool GenerateAll(const std::vector<const FileDescriptor*>& files,
+                           const string& parameter,
+                           GeneratorContext* context,
+                           string* error) const {
+    for (int i = 0; i < files.size(); i++) {
+      for (auto file : files) {
+        bool can_generate =
+            (new_pool_.FindFileByName(file->name()) == nullptr);
+        for (int j = 0; j < file->dependency_count(); j++) {
+          can_generate &= (new_pool_.FindFileByName(
+              file->dependency(j)->name()) != nullptr);
+        }
+        for (int j = 0; j < file->public_dependency_count(); j++) {
+          can_generate &= (new_pool_.FindFileByName(
+              file->public_dependency(j)->name()) != nullptr);
+        }
+        for (int j = 0; j < file->weak_dependency_count(); j++) {
+          can_generate &= (new_pool_.FindFileByName(
+              file->weak_dependency(j)->name()) != nullptr);
+        }
+        if (can_generate) {
+          Generate(file, parameter, context, error);
+          break;
+        }
+      }
+    }
+
+    return true;
+  }
+
+  virtual bool Generate(const FileDescriptor* file,
+                        const string& parameter,
+                        GeneratorContext* context,
+                        string* error) const {
+    FileDescriptorProto new_file;
+    file->CopyTo(&new_file);
+    SchemaGroupStripper::StripFile(file, &new_file);
+
+    EnumScrubber enum_scrubber;
+    enum_scrubber.ScrubFile(&new_file);
+    ExtensionStripper::StripFile(&new_file);
+    FieldScrubber::ScrubFile(&new_file);
+    new_file.set_syntax("proto3");
+
+    string filename = file->name();
+    string basename = StripProto(filename);
+
+    std::vector<std::pair<string,string>> option_pairs;
+    ParseGeneratorParameter(parameter, &option_pairs);
+
+    std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> output(
+        context->Open(basename + ".proto"));
+    string content = new_pool_.BuildFile(new_file)->DebugString();
+    Printer printer(output.get(), '$');
+    printer.WriteRaw(content.c_str(), content.size());
+
+    return true;
+  }
+};
+
+}  // namespace compiler
+}  // namespace protobuf
+}  // namespace google
+
+int main(int argc, char* argv[]) {
+  google::protobuf::compiler::Proto2ToProto3Generator generator;
+  return google::protobuf::compiler::PluginMain(argc, argv, &generator);
+}
diff --git a/benchmarks/util/schema_proto2_to_proto3_util.h b/benchmarks/util/schema_proto2_to_proto3_util.h
index 089012dd..8cbcbc40 100644
--- a/benchmarks/util/schema_proto2_to_proto3_util.h
+++ b/benchmarks/util/schema_proto2_to_proto3_util.h
@@ -74,10 +74,10 @@ class SchemaGroupStripper {
 
 };
 
-class SchemaAddZeroEnumValue {
+class EnumScrubber {
 
  public:
-  SchemaAddZeroEnumValue()
+  EnumScrubber()
       : total_added_(0) {
   }
 
@@ -130,6 +130,64 @@ class SchemaAddZeroEnumValue {
   int total_added_;
 };
 
+class ExtensionStripper {
+ public:
+  static void StripFile(FileDescriptorProto *file) {
+    for (int i = 0; i < file->mutable_message_type()->size(); i++) {
+      StripMessage(file->mutable_message_type(i));
+    }
+    file->mutable_extension()->Clear();
+  }
+ private:
+  static void StripMessage(DescriptorProto *message_type) {
+    message_type->mutable_extension()->Clear();
+    message_type->clear_extension_range();
+    for (int i = 0; i < message_type->mutable_nested_type()->size(); i++) {
+      StripMessage(message_type->mutable_nested_type(i));
+    }
+  }
+};
+
+
+class FieldScrubber {
+ public:
+  static void ScrubFile(FileDescriptorProto *file) {
+    for (int i = 0; i < file->mutable_message_type()->size(); i++) {
+      ScrubMessage(file->mutable_message_type(i));
+    }
+    for (int i = 0; i < file->mutable_extension()->size(); i++) {
+      file->mutable_extension(i)->clear_default_value();
+      if (ShouldClearLabel(file->mutable_extension(i))) {
+        file->mutable_extension(i)->clear_label();
+      }
+    }
+  }
+ private:
+  static bool ShouldClearLabel(const FieldDescriptorProto *field) {
+    return field->label() == FieldDescriptorProto::LABEL_OPTIONAL ||
+           field->label() == FieldDescriptorProto::LABEL_REQUIRED;
+  }
+
+  static void ScrubMessage(DescriptorProto *message_type) {
+    message_type->mutable_extension()->Clear();
+    for (int i = 0; i < message_type->mutable_extension()->size(); i++) {
+      message_type->mutable_extension(i)->clear_default_value();
+      if (ShouldClearLabel(message_type->mutable_extension(i))) {
+        message_type->mutable_extension(i)->clear_label();
+      }
+    }
+    for (int i = 0; i < message_type->mutable_field()->size(); i++) {
+      message_type->mutable_field(i)->clear_default_value();
+      if (ShouldClearLabel(message_type->mutable_field(i))) {
+        message_type->mutable_field(i)->clear_label();
+      }
+    }
+    for (int i = 0; i < message_type->mutable_nested_type()->size(); i++) {
+      ScrubMessage(message_type->mutable_nested_type(i));
+    }
+  }
+};
+
 }  // namespace util
 }  // namespace protobuf
 }  // namespace google