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diff --git a/src/google/protobuf/compiler/objectivec/objectivec_primitive_field.cc b/src/google/protobuf/compiler/objectivec/objectivec_primitive_field.cc
new file mode 100644
index 00000000..8272c67b
--- /dev/null
+++ b/src/google/protobuf/compiler/objectivec/objectivec_primitive_field.cc
@@ -0,0 +1,162 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <map>
+#include <string>
+
+#include <google/protobuf/compiler/objectivec/objectivec_primitive_field.h>
+#include <google/protobuf/stubs/common.h>
+#include <google/protobuf/compiler/objectivec/objectivec_helpers.h>
+#include <google/protobuf/io/printer.h>
+#include <google/protobuf/wire_format.h>
+#include <google/protobuf/wire_format_lite_inl.h>
+#include <google/protobuf/stubs/strutil.h>
+#include <google/protobuf/stubs/substitute.h>
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+namespace objectivec {
+
+using internal::WireFormat;
+using internal::WireFormatLite;
+
+namespace {
+
+const char* PrimitiveTypeName(const FieldDescriptor* descriptor) {
+  ObjectiveCType type = GetObjectiveCType(descriptor);
+  switch (type) {
+    case OBJECTIVECTYPE_INT32:
+      return "int32_t";
+    case OBJECTIVECTYPE_UINT32:
+      return "uint32_t";
+    case OBJECTIVECTYPE_INT64:
+      return "int64_t";
+    case OBJECTIVECTYPE_UINT64:
+      return "uint64_t";
+    case OBJECTIVECTYPE_FLOAT:
+      return "float";
+    case OBJECTIVECTYPE_DOUBLE:
+      return "double";
+    case OBJECTIVECTYPE_BOOLEAN:
+      return "BOOL";
+    case OBJECTIVECTYPE_STRING:
+      return "NSString";
+    case OBJECTIVECTYPE_DATA:
+      return "NSData";
+    case OBJECTIVECTYPE_ENUM:
+      return "int32_t";
+    case OBJECTIVECTYPE_MESSAGE:
+      return NULL;
+  }
+}
+
+const char* PrimitiveArrayTypeName(const FieldDescriptor* descriptor) {
+  ObjectiveCType type = GetObjectiveCType(descriptor);
+  switch (type) {
+    case OBJECTIVECTYPE_INT32:
+      return "Int32";
+    case OBJECTIVECTYPE_UINT32:
+      return "UInt32";
+    case OBJECTIVECTYPE_INT64:
+      return "Int64";
+    case OBJECTIVECTYPE_UINT64:
+      return "UInt64";
+    case OBJECTIVECTYPE_FLOAT:
+      return "Float";
+    case OBJECTIVECTYPE_DOUBLE:
+      return "Double";
+    case OBJECTIVECTYPE_BOOLEAN:
+      return "Bool";
+    case OBJECTIVECTYPE_STRING:
+      return "";  // Want NSArray
+    case OBJECTIVECTYPE_DATA:
+      return "";  // Want NSArray
+    case OBJECTIVECTYPE_ENUM:
+      return "Enum";
+    case OBJECTIVECTYPE_MESSAGE:
+      return "";  // Want NSArray
+  }
+}
+
+void SetPrimitiveVariables(const FieldDescriptor* descriptor,
+                           map<string, string>* variables) {
+  std::string primitive_name = PrimitiveTypeName(descriptor);
+  (*variables)["type"] = primitive_name;
+  (*variables)["storage_type"] = primitive_name;
+}
+
+}  // namespace
+
+PrimitiveFieldGenerator::PrimitiveFieldGenerator(
+    const FieldDescriptor* descriptor)
+    : SingleFieldGenerator(descriptor) {
+  SetPrimitiveVariables(descriptor, &variables_);
+}
+
+PrimitiveFieldGenerator::~PrimitiveFieldGenerator() {}
+
+PrimitiveObjFieldGenerator::PrimitiveObjFieldGenerator(
+    const FieldDescriptor* descriptor)
+    : ObjCObjFieldGenerator(descriptor) {
+  SetPrimitiveVariables(descriptor, &variables_);
+  variables_["property_storage_attribute"] = "copy";
+}
+
+PrimitiveObjFieldGenerator::~PrimitiveObjFieldGenerator() {}
+
+RepeatedPrimitiveFieldGenerator::RepeatedPrimitiveFieldGenerator(
+    const FieldDescriptor* descriptor)
+    : RepeatedFieldGenerator(descriptor) {
+  SetPrimitiveVariables(descriptor, &variables_);
+
+  string base_name = PrimitiveArrayTypeName(descriptor);
+  if (base_name.length()) {
+    variables_["array_storage_type"] = "GPB" + base_name + "Array";
+  } else {
+    variables_["array_storage_type"] = "NSMutableArray";
+  }
+}
+
+RepeatedPrimitiveFieldGenerator::~RepeatedPrimitiveFieldGenerator() {}
+
+void RepeatedPrimitiveFieldGenerator::FinishInitialization(void) {
+  RepeatedFieldGenerator::FinishInitialization();
+  if (IsPrimitiveType(descriptor_)) {
+    // No comment needed for primitive types.
+    variables_["array_comment"] = "";
+  }
+}
+
+
+}  // namespace objectivec
+}  // namespace compiler
+}  // namespace protobuf
+}  // namespace google