compiler/cpp/cpp_helpers.h

// Protocol Buffers - Google's data interchange format
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// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_HELPERS_H__
#define GOOGLE_PROTOBUF_COMPILER_CPP_HELPERS_H__

#include <string>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/descriptor.pb.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {

// Commonly-used separator comments.  Thick is a line of '=', thin is a line
// of '-'.
extern const char kThickSeparator[];
extern const char kThinSeparator[];

// Returns the non-nested type name for the given type.  If "qualified" is
// true, prefix the type with the full namespace.  For example, if you had:
//   package foo.bar;
//   message Baz { message Qux {} }
// Then the qualified ClassName for Qux would be:
//   ::foo::bar::Baz_Qux
// While the non-qualified version would be:
//   Baz_Qux
string ClassName(const Descriptor* descriptor, bool qualified);
string ClassName(const EnumDescriptor* enum_descriptor, bool qualified);

// Get the (unqualified) name that should be used for this field in C++ code.
// The name is coerced to lower-case to emulate proto1 behavior.  People
// should be using lowercase-with-underscores style for proto field names
// anyway, so normally this just returns field->name().
string FieldName(const FieldDescriptor* field);

// Get the unqualified name that should be used for a field's field
// number constant.
string FieldConstantName(const FieldDescriptor *field);

// Returns the scope where the field was defined (for extensions, this is
// different from the message type to which the field applies).
inline const Descriptor* FieldScope(const FieldDescriptor* field) {
  return field->is_extension() ?
    field->extension_scope() : field->containing_type();
}

// Strips ".proto" or ".protodevel" from the end of a filename.
string StripProto(const string& filename);

// Get the C++ type name for a primitive type (e.g. "double", "::google::protobuf::int32", etc.).
// Note:  non-built-in type names will be qualified, meaning they will start
// with a ::.  If you are using the type as a template parameter, you will
// need to insure there is a space between the < and the ::, because the
// ridiculous C++ standard defines "<:" to be a synonym for "[".
const char* PrimitiveTypeName(FieldDescriptor::CppType type);

// Get the declared type name in CamelCase format, as is used e.g. for the
// methods of WireFormat.  For example, TYPE_INT32 becomes "Int32".
const char* DeclaredTypeMethodName(FieldDescriptor::Type type);

// Get code that evaluates to the field's default value.
string DefaultValue(const FieldDescriptor* field);

// Convert a file name into a valid identifier.
string FilenameIdentifier(const string& filename);

// Return the name of the AddDescriptors() function for a given file.
string GlobalAddDescriptorsName(const string& filename);

// Return the name of the AssignDescriptors() function for a given file.
string GlobalAssignDescriptorsName(const string& filename);

// Return the name of the ShutdownFile() function for a given file.
string GlobalShutdownFileName(const string& filename);

// Do message classes in this file keep track of unknown fields?
inline const bool HasUnknownFields(const FileDescriptor *file) {
  return file->options().optimize_for() != FileOptions::LITE_RUNTIME;
}

// Does this file have generated parsing, serialization, and other
// standard methods for which reflection-based fallback implementations exist?
inline const bool HasGeneratedMethods(const FileDescriptor *file) {
  return file->options().optimize_for() != FileOptions::CODE_SIZE;
}

// Do message classes in this file have descriptor and refelction methods?
inline const bool HasDescriptorMethods(const FileDescriptor *file) {
  return file->options().optimize_for() != FileOptions::LITE_RUNTIME;
}

// Should string fields in this file verify that their contents are UTF-8?
inline const bool HasUtf8Verification(const FileDescriptor* file) {
  return file->options().optimize_for() != FileOptions::LITE_RUNTIME;
}

// Should we generate a separate, super-optimized code path for serializing to
// flat arrays?  We don't do this in Lite mode because we'd rather reduce code
// size.
inline const bool HasFastArraySerialization(const FileDescriptor* file) {
  return file->options().optimize_for() == FileOptions::SPEED;
}

}  // namespace cpp
}  // namespace compiler
}  // namespace protobuf

}  // namespace google
#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_HELPERS_H__