Provide util funtions to figure out correct php class names. (#3850)

src/google/protobuf/compiler/php/php_generator.cc

@@ -215,19 +215,12 @@ std::string NamespacedName(const string& classname,
 
 template <typename DescriptorType>
 std::string FullClassName(const DescriptorType* desc, bool is_descriptor) {
-  string classname = desc->name();
-  const Descriptor* containing = desc->containing_type();
-  while (containing != NULL) {
-    classname = containing->name() + '_' + classname;
-    containing = containing->containing_type();
-  }
-  classname = ClassNamePrefix(classname, desc) + classname;
+  string classname = GeneratedClassName(desc);
   return NamespacedName(classname, desc, is_descriptor);
 }
 
 std::string FullClassName(const ServiceDescriptor* desc, bool is_descriptor) {
-  string classname = desc->name();
-  classname = ClassNamePrefix(classname, desc) + classname;
+  string classname = GeneratedClassName(desc);
   return NamespacedName(classname, desc, is_descriptor);
 }
 
@@ -1419,6 +1412,31 @@ bool Generator::Generate(const FileDescriptor* file, const string& parameter,
   return true;
 }
 
+std::string GeneratedClassName(const Descriptor* desc) {
+  std::string classname = desc->name();
+  const Descriptor* containing = desc->containing_type();
+  while (containing != NULL) {
+    classname = containing->name() + '_' + classname;
+    containing = containing->containing_type();
+  }
+  return ClassNamePrefix(classname, desc) + classname;
+}
+
+std::string GeneratedClassName(const EnumDescriptor* desc) {
+  std::string classname = desc->name();
+  const Descriptor* containing = desc->containing_type();
+  while (containing != NULL) {
+    classname = containing->name() + '_' + classname;
+    containing = containing->containing_type();
+  }
+  return ClassNamePrefix(classname, desc) + classname;
+}
+
+std::string GeneratedClassName(const ServiceDescriptor* desc) {
+  std::string classname = desc->name();
+  return ClassNamePrefix(classname, desc) + classname;
+}
+
 }  // namespace php
 }  // namespace compiler
 }  // namespace protobuf

src/google/protobuf/compiler/php/php_generator.h

@@ -32,6 +32,7 @@
 #define GOOGLE_PROTOBUF_COMPILER_PHP_GENERATOR_H__
 
 #include <google/protobuf/compiler/code_generator.h>
+#include <google/protobuf/descriptor.h>
 
 #include <string>
 
@@ -47,8 +48,16 @@ class LIBPROTOC_EXPORT Generator
       const string& parameter,
       GeneratorContext* generator_context,
       string* error) const;
+
 };
 
+// To skip reserved keywords in php, some generated classname are prefixed.
+// Other code generators may need following API to figure out the actual
+// classname.
+std::string GeneratedClassName(const google::protobuf::Descriptor* desc);
+std::string GeneratedClassName(const google::protobuf::EnumDescriptor* desc);
+std::string GeneratedClassName(const google::protobuf::ServiceDescriptor* desc);
+
 }  // namespace php
 }  // namespace compiler
 }  // namespace protobuf