From 13fd045dbb2b4dacea32be162a41d5a4b0d1802f Mon Sep 17 00:00:00 2001
From: Adam Cozzette <acozzette@google.com>
Date: Tue, 12 Sep 2017 10:32:01 -0700
Subject: Integrated internal changes from Google

---
 src/google/protobuf/compiler/cpp/cpp_generator.cc | 31 ++++++++++++++++++-----
 1 file changed, 25 insertions(+), 6 deletions(-)

(limited to 'src/google/protobuf/compiler/cpp/cpp_generator.cc')

diff --git a/src/google/protobuf/compiler/cpp/cpp_generator.cc b/src/google/protobuf/compiler/cpp/cpp_generator.cc
index 68abd0ef..e01e5dca 100644
--- a/src/google/protobuf/compiler/cpp/cpp_generator.cc
+++ b/src/google/protobuf/compiler/cpp/cpp_generator.cc
@@ -46,6 +46,7 @@
 #include <google/protobuf/io/printer.h>
 #include <google/protobuf/io/zero_copy_stream.h>
 #include <google/protobuf/descriptor.pb.h>
+#include <google/protobuf/stubs/strutil.h>
 
 namespace google {
 namespace protobuf {
@@ -84,7 +85,7 @@ bool CppGenerator::Generate(const FileDescriptor* file,
   // __declspec(dllimport) depending on what is being compiled.
   //
   Options file_options;
-
+  bool split_source = false;
   for (int i = 0; i < options.size(); i++) {
     if (options[i].first == "dllexport_decl") {
       file_options.dllexport_decl = options[i].second;
@@ -98,10 +99,14 @@ bool CppGenerator::Generate(const FileDescriptor* file,
       file_options.annotation_guard_name = options[i].second;
     } else if (options[i].first == "lite") {
       file_options.enforce_lite = true;
+    } else if (options[i].first == "lite_implicit_weak_fields") {
+      file_options.lite_implicit_weak_fields = true;
     } else if (options[i].first == "table_driven_parsing") {
       file_options.table_driven_parsing = true;
     } else if (options[i].first == "table_driven_serialization") {
       file_options.table_driven_serialization = true;
+    } else if (options[i].first == "split_source") {
+      split_source = true;
     } else {
       *error = "Unknown generator option: " + options[i].first;
       return false;
@@ -135,14 +140,13 @@ bool CppGenerator::Generate(const FileDescriptor* file,
     }
   }
 
-  basename.append(".pb");
   {
     google::protobuf::scoped_ptr<io::ZeroCopyOutputStream> output(
-        generator_context->Open(basename + ".h"));
+        generator_context->Open(basename + ".pb.h"));
     GeneratedCodeInfo annotations;
     io::AnnotationProtoCollector<GeneratedCodeInfo> annotation_collector(
         &annotations);
-    string info_path = basename + ".h.meta";
+    string info_path = basename + ".pb.h.meta";
     io::Printer printer(output.get(), '$', file_options.annotate_headers
                                                ? &annotation_collector
                                                : NULL);
@@ -156,9 +160,24 @@ bool CppGenerator::Generate(const FileDescriptor* file,
   }
 
   // Generate cc file.
-  {
+  if (split_source) {
+    {
+      // This is the global .cc file, containing enum/services/tables/reflection
+      google::protobuf::scoped_ptr<io::ZeroCopyOutputStream> output(
+          generator_context->Open(basename + ".pb.cc"));
+      io::Printer printer(output.get(), '$');
+      file_generator.GenerateGlobalSource(&printer);
+    }
+    for (int i = 0; i < file_generator.NumMessages(); i++) {
+      // TODO(gerbens) Agree on naming scheme.
+      google::protobuf::scoped_ptr<io::ZeroCopyOutputStream> output(
+          generator_context->Open(basename + "." + SimpleItoa(i) + ".cc"));
+      io::Printer printer(output.get(), '$');
+      file_generator.GenerateSourceForMessage(i, &printer);
+    }
+  } else {
     google::protobuf::scoped_ptr<io::ZeroCopyOutputStream> output(
-        generator_context->Open(basename + ".cc"));
+        generator_context->Open(basename + ".pb.cc"));
     io::Printer printer(output.get(), '$');
     file_generator.GenerateSource(&printer);
   }
-- 
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