path: root/src/google/protobuf/generated_message_reflection.h

// 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.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.
//
// This header is logically internal, but is made public because it is used
// from protocol-compiler-generated code, which may reside in other components.

#ifndef GOOGLE_PROTOBUF_GENERATED_MESSAGE_REFLECTION_H__
#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_REFLECTION_H__

#include <string>
#include <vector>
#include <google/protobuf/stubs/casts.h>
#include <google/protobuf/stubs/common.h>
// TODO(jasonh): Remove this once the compiler change to directly include this
// is released to components.
#include <google/protobuf/generated_enum_reflection.h>
#include <google/protobuf/message.h>
#include <google/protobuf/metadata.h>
#include <google/protobuf/stubs/once.h>
#include <google/protobuf/port.h>
#include <google/protobuf/unknown_field_set.h>


#include <google/protobuf/port_def.inc>

#ifdef SWIG
#error "You cannot SWIG proto headers"
#endif

namespace upb {
namespace google_opensource {
class GMR_Handlers;
}  // namespace google_opensource
}  // namespace upb

namespace google {
namespace protobuf {
class DescriptorPool;
class MapKey;
class MapValueRef;
}  // namespace protobuf
}  // namespace google

namespace google {
namespace protobuf {
namespace flat {
class MetadataBuilder;
}  // namespace flat
}  // namespace protobuf
}  // namespace google

namespace google {
namespace protobuf {
namespace internal {
class DefaultEmptyOneof;
class ReflectionAccessor;

// Defined in this file.
class GeneratedMessageReflection;

// Defined in other files.
class ExtensionSet;             // extension_set.h
class WeakFieldMap;             // weak_field_map.h

// This struct describes the internal layout of the message, hence this is
// used to act on the message reflectively.
//   default_instance:  The default instance of the message.  This is only
//                  used to obtain pointers to default instances of embedded
//                  messages, which GetMessage() will return if the particular
//                  sub-message has not been initialized yet.  (Thus, all
//                  embedded message fields *must* have non-NULL pointers
//                  in the default instance.)
//   offsets:       An array of ints giving the byte offsets.
//                  For each oneof or weak field, the offset is relative to the
//                  default_instance. These can be computed at compile time
//                  using the
//                  PROTO2_GENERATED_DEFAULT_ONEOF_FIELD_OFFSET()
//                  macro. For each none oneof field, the offset is related to
//                  the start of the message object.  These can be computed at
//                  compile time using the
//                  PROTO2_GENERATED_MESSAGE_FIELD_OFFSET() macro.
//                  Besides offsets for all fields, this array also contains
//                  offsets for oneof unions. The offset of the i-th oneof union
//                  is offsets[descriptor->field_count() + i].
//   has_bit_indices:  Mapping from field indexes to their index in the has
//                  bit array.
//   has_bits_offset:  Offset in the message of an array of uint32s of size
//                  descriptor->field_count()/32, rounded up.  This is a
//                  bitfield where each bit indicates whether or not the
//                  corresponding field of the message has been initialized.
//                  The bit for field index i is obtained by the expression:
//                    has_bits[i / 32] & (1 << (i % 32))
//   unknown_fields_offset:  Offset in the message of the UnknownFieldSet for
//                  the message.
//   extensions_offset:  Offset in the message of the ExtensionSet for the
//                  message, or -1 if the message type has no extension
//                  ranges.
//   oneof_case_offset:  Offset in the message of an array of uint32s of
//                  size descriptor->oneof_decl_count().  Each uint32
//                  indicates what field is set for each oneof.
//   object_size:   The size of a message object of this type, as measured
//                  by sizeof().
//   arena_offset:  If a message doesn't have a unknown_field_set that stores
//                  the arena, it must have a direct pointer to the arena.
//   weak_field_map_offset: If the message proto has weak fields, this is the
//                  offset of _weak_field_map_ in the generated proto. Otherwise
//                  -1.
struct ReflectionSchema {
 public:
  // Size of a google::protobuf::Message object of this type.
  uint32 GetObjectSize() const { return static_cast<uint32>(object_size_); }

  // Offset of a non-oneof field.  Getting a field offset is slightly more
  // efficient when we know statically that it is not a oneof field.
  uint32 GetFieldOffsetNonOneof(const FieldDescriptor* field) const {
    GOOGLE_DCHECK(!field->containing_oneof());
    return OffsetValue(offsets_[field->index()], field->type());
  }

  // Offset of any field.
  uint32 GetFieldOffset(const FieldDescriptor* field) const {
    if (field->containing_oneof()) {
      size_t offset =
          static_cast<size_t>(field->containing_type()->field_count() +
          field->containing_oneof()->index());
      return OffsetValue(offsets_[offset], field->type());
    } else {
      return GetFieldOffsetNonOneof(field);
    }
  }

  bool IsFieldInlined(const FieldDescriptor* field) const {
    if (field->containing_oneof()) {
      size_t offset =
          static_cast<size_t>(field->containing_type()->field_count() +
                              field->containing_oneof()->index());
      return Inlined(offsets_[offset], field->type());
    } else {
      return Inlined(offsets_[field->index()], field->type());
    }
  }

  uint32 GetOneofCaseOffset(const OneofDescriptor* oneof_descriptor) const {
    return static_cast<uint32>(oneof_case_offset_) +
           static_cast<uint32>(
               static_cast<size_t>(oneof_descriptor->index()) * sizeof(uint32));
  }

  bool HasHasbits() const { return has_bits_offset_ != -1; }

  // Bit index within the bit array of hasbits.  Bit order is low-to-high.
  uint32 HasBitIndex(const FieldDescriptor* field) const {
    GOOGLE_DCHECK(HasHasbits());
    return has_bit_indices_[field->index()];
  }

  // Byte offset of the hasbits array.
  uint32 HasBitsOffset() const {
    GOOGLE_DCHECK(HasHasbits());
    return static_cast<uint32>(has_bits_offset_);
  }

  // The offset of the InternalMetadataWithArena member.
  // For Lite this will actually be an InternalMetadataWithArenaLite.
  // The schema doesn't contain enough information to distinguish between
  // these two cases.
  uint32 GetMetadataOffset() const {
    return static_cast<uint32>(metadata_offset_);
  }

  // Whether this message has an ExtensionSet.
  bool HasExtensionSet() const { return extensions_offset_ != -1; }

  // The offset of the ExtensionSet in this message.
  uint32 GetExtensionSetOffset() const {
    GOOGLE_DCHECK(HasExtensionSet());
    return static_cast<uint32>(extensions_offset_);
  }

  // The off set of WeakFieldMap when the message contains weak fields.
  // The default is 0 for now.
  int GetWeakFieldMapOffset() const { return weak_field_map_offset_; }

  bool IsDefaultInstance(const Message& message) const {
    return &message == default_instance_;
  }

  // Returns a pointer to the default value for this field.  The size and type
  // of the underlying data depends on the field's type.
  const void *GetFieldDefault(const FieldDescriptor* field) const {
    return reinterpret_cast<const uint8*>(default_instance_) +
           OffsetValue(offsets_[field->index()], field->type());
  }


  bool HasWeakFields() const { return weak_field_map_offset_ > 0; }

  // These members are intended to be private, but we cannot actually make them
  // private because this prevents us from using aggregate initialization of
  // them, ie.
  //
  //   ReflectionSchema schema = {a, b, c, d, e, ...};
 // private:
  const Message* default_instance_;
  const uint32* offsets_;
  const uint32* has_bit_indices_;
  int has_bits_offset_;
  int metadata_offset_;
  int extensions_offset_;
  int oneof_case_offset_;
  int object_size_;
  int weak_field_map_offset_;

  // We tag offset values to provide additional data about fields (such as
  // inlined).
  static uint32 OffsetValue(uint32 v, FieldDescriptor::Type type) {
    if (type == FieldDescriptor::TYPE_STRING ||
        type == FieldDescriptor::TYPE_BYTES) {
      return v & ~1u;
    } else {
      return v;
    }
  }

  static bool Inlined(uint32 v, FieldDescriptor::Type type) {
    if (type == FieldDescriptor::TYPE_STRING ||
        type == FieldDescriptor::TYPE_BYTES) {
      return v & 1u;
    } else {
      // Non string/byte fields are not inlined.
      return false;
    }
  }
};

// Structs that the code generator emits directly to describe a message.
// These should never used directly except to build a ReflectionSchema
// object.
//
// EXPERIMENTAL: these are changing rapidly, and may completely disappear
// or merge with ReflectionSchema.
struct MigrationSchema {
  int32 offsets_index;
  int32 has_bit_indices_index;
  int object_size;
};

// THIS CLASS IS NOT INTENDED FOR DIRECT USE.  It is intended for use
// by generated code.  This class is just a big hack that reduces code
// size.
//
// A GeneratedMessageReflection is an implementation of Reflection
// which expects all fields to be backed by simple variables located in
// memory.  The locations are given using a base pointer and a set of
// offsets.
//
// It is required that the user represents fields of each type in a standard
// way, so that GeneratedMessageReflection can cast the void* pointer to
// the appropriate type.  For primitive fields and string fields, each field
// should be represented using the obvious C++ primitive type.  Enums and
// Messages are different:
//  - Singular Message fields are stored as a pointer to a Message.  These
//    should start out NULL, except for in the default instance where they
//    should start out pointing to other default instances.
//  - Enum fields are stored as an int.  This int must always contain
//    a valid value, such that EnumDescriptor::FindValueByNumber() would
//    not return NULL.
//  - Repeated fields are stored as RepeatedFields or RepeatedPtrFields
//    of whatever type the individual field would be.  Strings and
//    Messages use RepeatedPtrFields while everything else uses
//    RepeatedFields.
class GeneratedMessageReflection final : public Reflection {
 public:
  // Constructs a GeneratedMessageReflection.
  // Parameters:
  //   descriptor:    The descriptor for the message type being implemented.
  //   schema:        The description of the internal guts of the message.
  //   pool:          DescriptorPool to search for extension definitions.  Only
  //                  used by FindKnownExtensionByName() and
  //                  FindKnownExtensionByNumber().
  //   factory:       MessageFactory to use to construct extension messages.
  GeneratedMessageReflection(const Descriptor* descriptor,
                             const ReflectionSchema& schema,
                             const DescriptorPool* pool,
                             MessageFactory* factory);

  ~GeneratedMessageReflection() override;

  // implements Reflection -------------------------------------------

  const UnknownFieldSet& GetUnknownFields(
      const Message& message) const override;
  UnknownFieldSet* MutableUnknownFields(Message* message) const override;

  size_t SpaceUsedLong(const Message& message) const override;

  bool HasField(const Message& message,
                const FieldDescriptor* field) const override;
  int FieldSize(const Message& message,
                const FieldDescriptor* field) const override;
  void ClearField(Message* message,
                  const FieldDescriptor* field) const override;
  bool HasOneof(const Message& message,
                const OneofDescriptor* oneof_descriptor) const override;
  void ClearOneof(Message* message,
                  const OneofDescriptor* oneof_descriptor) const override;
  void RemoveLast(Message* message,
                  const FieldDescriptor* field) const override;
  Message* ReleaseLast(Message* message,
                       const FieldDescriptor* field) const override;
  void Swap(Message* message1, Message* message2) const override;
  void SwapFields(
      Message* message1, Message* message2,
      const std::vector<const FieldDescriptor*>& fields) const override;
  void SwapElements(Message* message, const FieldDescriptor* field, int index1,
                    int index2) const override;
  void ListFields(const Message& message,
                  std::vector<const FieldDescriptor*>* output) const override;
  int32 GetInt32(const Message& message,
                 const FieldDescriptor* field) const override;
  int64 GetInt64(const Message& message,
                 const FieldDescriptor* field) const override;
  uint32 GetUInt32(const Message& message,
                   const FieldDescriptor* field) const override;
  uint64 GetUInt64(const Message& message,
                   const FieldDescriptor* field) const override;
  float GetFloat(const Message& message,
                 const FieldDescriptor* field) const override;
  double GetDouble(const Message& message,
                   const FieldDescriptor* field) const override;
  bool GetBool(const Message& message,
               const FieldDescriptor* field) const override;
  std::string GetString(const Message& message,
                   const FieldDescriptor* field) const override;
  const std::string& GetStringReference(const Message& message,
                                   const FieldDescriptor* field,
                                   std::string* scratch) const override;
  const EnumValueDescriptor* GetEnum(
      const Message& message, const FieldDescriptor* field) const override;
  int GetEnumValue(const Message& message,
                   const FieldDescriptor* field) const override;
  const Message& GetMessage(const Message& message,
                            const FieldDescriptor* field,
                            MessageFactory* factory = NULL) const override;

  const FieldDescriptor* GetOneofFieldDescriptor(
      const Message& message,
      const OneofDescriptor* oneof_descriptor) const override;

 private:
  bool ContainsMapKey(const Message& message, const FieldDescriptor* field,
                      const MapKey& key) const override;
  bool InsertOrLookupMapValue(Message* message, const FieldDescriptor* field,
                              const MapKey& key,
                              MapValueRef* val) const override;
  bool DeleteMapValue(Message* message, const FieldDescriptor* field,
                      const MapKey& key) const override;
  MapIterator MapBegin(Message* message,
                       const FieldDescriptor* field) const override;
  MapIterator MapEnd(Message* message,
                     const FieldDescriptor* field) const override;
  int MapSize(const Message& message,
              const FieldDescriptor* field) const override;

 public:
  void SetInt32(Message* message, const FieldDescriptor* field,
                int32 value) const override;
  void SetInt64(Message* message, const FieldDescriptor* field,
                int64 value) const override;
  void SetUInt32(Message* message, const FieldDescriptor* field,
                 uint32 value) const override;
  void SetUInt64(Message* message, const FieldDescriptor* field,
                 uint64 value) const override;
  void SetFloat(Message* message, const FieldDescriptor* field,
                float value) const override;
  void SetDouble(Message* message, const FieldDescriptor* field,
                 double value) const override;
  void SetBool(Message* message, const FieldDescriptor* field,
               bool value) const override;
  void SetString(Message* message, const FieldDescriptor* field,
                 const std::string& value) const override;
  void SetEnum(Message* message, const FieldDescriptor* field,
               const EnumValueDescriptor* value) const override;
  void SetEnumValue(Message* message, const FieldDescriptor* field,
                    int value) const override;
  Message* MutableMessage(Message* message, const FieldDescriptor* field,
                          MessageFactory* factory = NULL) const override;
  void SetAllocatedMessage(Message* message, Message* sub_message,
                           const FieldDescriptor* field) const override;
  Message* ReleaseMessage(Message* message, const FieldDescriptor* field,
                          MessageFactory* factory = NULL) const override;

  int32 GetRepeatedInt32(const Message& message, const FieldDescriptor* field,
                         int index) const override;
  int64 GetRepeatedInt64(const Message& message, const FieldDescriptor* field,
                         int index) const override;
  uint32 GetRepeatedUInt32(const Message& message, const FieldDescriptor* field,
                           int index) const override;
  uint64 GetRepeatedUInt64(const Message& message, const FieldDescriptor* field,
                           int index) const override;
  float GetRepeatedFloat(const Message& message, const FieldDescriptor* field,
                         int index) const override;
  double GetRepeatedDouble(const Message& message, const FieldDescriptor* field,
                           int index) const override;
  bool GetRepeatedBool(const Message& message, const FieldDescriptor* field,
                       int index) const override;
  std::string GetRepeatedString(const Message& message, const FieldDescriptor* field,
                           int index) const override;
  const std::string& GetRepeatedStringReference(const Message& message,
                                           const FieldDescriptor* field,
                                           int index,
                                           std::string* scratch) const override;
  const EnumValueDescriptor* GetRepeatedEnum(const Message& message,
                                             const FieldDescriptor* field,
                                             int index) const override;
  int GetRepeatedEnumValue(const Message& message, const FieldDescriptor* field,
                           int index) const override;
  const Message& GetRepeatedMessage(const Message& message,
                                    const FieldDescriptor* field,
                                    int index) const override;

  // Set the value of a field.
  void SetRepeatedInt32(Message* message, const FieldDescriptor* field,
                        int index, int32 value) const override;
  void SetRepeatedInt64(Message* message, const FieldDescriptor* field,
                        int index, int64 value) const override;
  void SetRepeatedUInt32(Message* message, const FieldDescriptor* field,
                         int index, uint32 value) const override;
  void SetRepeatedUInt64(Message* message, const FieldDescriptor* field,
                         int index, uint64 value) const override;
  void SetRepeatedFloat(Message* message, const FieldDescriptor* field,
                        int index, float value) const override;
  void SetRepeatedDouble(Message* message, const FieldDescriptor* field,
                         int index, double value) const override;
  void SetRepeatedBool(Message* message, const FieldDescriptor* field,
                       int index, bool value) const override;
  void SetRepeatedString(Message* message, const FieldDescriptor* field,
                         int index, const std::string& value) const override;
  void SetRepeatedEnum(Message* message, const FieldDescriptor* field,
                       int index,
                       const EnumValueDescriptor* value) const override;
  void SetRepeatedEnumValue(Message* message, const FieldDescriptor* field,
                            int index, int value) const override;
  // Get a mutable pointer to a field with a message type.
  Message* MutableRepeatedMessage(Message* message,
                                  const FieldDescriptor* field,
                                  int index) const override;

  void AddInt32(Message* message, const FieldDescriptor* field,
                int32 value) const override;
  void AddInt64(Message* message, const FieldDescriptor* field,
                int64 value) const override;
  void AddUInt32(Message* message, const FieldDescriptor* field,
                 uint32 value) const override;
  void AddUInt64(Message* message, const FieldDescriptor* field,
                 uint64 value) const override;
  void AddFloat(Message* message, const FieldDescriptor* field,
                float value) const override;
  void AddDouble(Message* message, const FieldDescriptor* field,
                 double value) const override;
  void AddBool(Message* message, const FieldDescriptor* field,
               bool value) const override;
  void AddString(Message* message, const FieldDescriptor* field,
                 const std::string& value) const override;
  void AddEnum(Message* message, const FieldDescriptor* field,
               const EnumValueDescriptor* value) const override;
  void AddEnumValue(Message* message, const FieldDescriptor* field,
                    int value) const override;
  Message* AddMessage(Message* message, const FieldDescriptor* field,
                      MessageFactory* factory = NULL) const override;
  void AddAllocatedMessage(Message* message, const FieldDescriptor* field,
                           Message* new_entry) const override;

  const FieldDescriptor* FindKnownExtensionByName(
      const std::string& name) const override;
  const FieldDescriptor* FindKnownExtensionByNumber(int number) const override;

  bool SupportsUnknownEnumValues() const override;

  // This value for arena_offset_ indicates that there is no arena pointer in
  // this message (e.g., old generated code).
  static const int kNoArenaPointer = -1;

  // This value for unknown_field_offset_ indicates that there is no
  // UnknownFieldSet in this message, and that instead, we are using the
  // Zero-Overhead Arena Pointer trick. When this is the case, arena_offset_
  // actually indexes to an InternalMetadataWithArena instance, which can return
  // either an arena pointer or an UnknownFieldSet or both. It is never the case
  // that unknown_field_offset_ == kUnknownFieldSetInMetadata && arena_offset_
  // == kNoArenaPointer.
  static const int kUnknownFieldSetInMetadata = -1;

 protected:
  void* MutableRawRepeatedField(Message* message, const FieldDescriptor* field,
                                FieldDescriptor::CppType, int ctype,
                                const Descriptor* desc) const override;

  const void* GetRawRepeatedField(const Message& message,
                                  const FieldDescriptor* field,
                                  FieldDescriptor::CppType, int ctype,
                                  const Descriptor* desc) const override;

  MessageFactory* GetMessageFactory() const override;

  void* RepeatedFieldData(Message* message, const FieldDescriptor* field,
                          FieldDescriptor::CppType cpp_type,
                          const Descriptor* message_type) const override;

 private:
  friend class google::protobuf::flat::MetadataBuilder;
  friend class ReflectionAccessor;
  friend class upb::google_opensource::GMR_Handlers;

  const Descriptor* const descriptor_;
  const ReflectionSchema schema_;
  const DescriptorPool* const descriptor_pool_;
  MessageFactory* const message_factory_;

  // Last non weak field index. This is an optimization when most weak fields
  // are at the end of the containing message. If a message proto doesn't
  // contain weak fields, then this field equals descriptor_->field_count().
  int last_non_weak_field_index_;

  template <class T>
  const T& GetRawNonOneof(const Message& message,
                          const FieldDescriptor* field) const;
  template <class T>
  T* MutableRawNonOneof(Message* message, const FieldDescriptor* field) const;

  template <typename Type>
  const Type& GetRaw(const Message& message,
                            const FieldDescriptor* field) const;
  template <typename Type>
  inline Type* MutableRaw(Message* message,
                          const FieldDescriptor* field) const;
  template <typename Type>
  inline const Type& DefaultRaw(const FieldDescriptor* field) const;

  inline const uint32* GetHasBits(const Message& message) const;
  inline uint32* MutableHasBits(Message* message) const;
  inline uint32 GetOneofCase(
      const Message& message,
      const OneofDescriptor* oneof_descriptor) const;
  inline uint32* MutableOneofCase(
      Message* message,
      const OneofDescriptor* oneof_descriptor) const;
  inline const ExtensionSet& GetExtensionSet(const Message& message) const;
  inline ExtensionSet* MutableExtensionSet(Message* message) const;
  inline Arena* GetArena(Message* message) const;

  inline const InternalMetadataWithArena& GetInternalMetadataWithArena(
      const Message& message) const;

  inline InternalMetadataWithArena*
      MutableInternalMetadataWithArena(Message* message) const;

  inline bool IsInlined(const FieldDescriptor* field) const;

  inline bool HasBit(const Message& message,
                     const FieldDescriptor* field) const;
  inline void SetBit(Message* message,
                     const FieldDescriptor* field) const;
  inline void ClearBit(Message* message,
                       const FieldDescriptor* field) const;
  inline void SwapBit(Message* message1,
                      Message* message2,
                      const FieldDescriptor* field) const;

  // This function only swaps the field. Should swap corresponding has_bit
  // before or after using this function.
  void SwapField(Message* message1,
                 Message* message2,
                 const FieldDescriptor* field) const;

  void SwapOneofField(Message* message1,
                      Message* message2,
                      const OneofDescriptor* oneof_descriptor) const;

  inline bool HasOneofField(const Message& message,
                            const FieldDescriptor* field) const;
  inline void SetOneofCase(Message* message,
                           const FieldDescriptor* field) const;
  inline void ClearOneofField(Message* message,
                              const FieldDescriptor* field) const;

  template <typename Type>
  inline const Type& GetField(const Message& message,
                              const FieldDescriptor* field) const;
  template <typename Type>
  inline void SetField(Message* message,
                       const FieldDescriptor* field, const Type& value) const;
  template <typename Type>
  inline Type* MutableField(Message* message,
                            const FieldDescriptor* field) const;
  template <typename Type>
  inline const Type& GetRepeatedField(const Message& message,
                                      const FieldDescriptor* field,
                                      int index) const;
  template <typename Type>
  inline const Type& GetRepeatedPtrField(const Message& message,
                                         const FieldDescriptor* field,
                                         int index) const;
  template <typename Type>
  inline void SetRepeatedField(Message* message,
                               const FieldDescriptor* field, int index,
                               Type value) const;
  template <typename Type>
  inline Type* MutableRepeatedField(Message* message,
                                    const FieldDescriptor* field,
                                    int index) const;
  template <typename Type>
  inline void AddField(Message* message,
                       const FieldDescriptor* field, const Type& value) const;
  template <typename Type>
  inline Type* AddField(Message* message,
                        const FieldDescriptor* field) const;

  int GetExtensionNumberOrDie(const Descriptor* type) const;

  // Internal versions of EnumValue API perform no checking. Called after checks
  // by public methods.
  void SetEnumValueInternal(Message* message,
                            const FieldDescriptor* field,
                            int value) const;
  void SetRepeatedEnumValueInternal(Message* message,
                                    const FieldDescriptor* field,
                                    int index,
                                    int value) const;
  void AddEnumValueInternal(Message* message,
                            const FieldDescriptor* field,
                            int value) const;


  Message* UnsafeArenaReleaseMessage(Message* message,
                                     const FieldDescriptor* field,
                                     MessageFactory* factory = NULL) const;

  void UnsafeArenaSetAllocatedMessage(Message* message,
                                      Message* sub_message,
                                      const FieldDescriptor* field) const;

  internal::MapFieldBase* MapData(Message* message,
                                  const FieldDescriptor* field) const override;

  friend inline  // inline so nobody can call this function.
      void
      RegisterAllTypesInternal(const Metadata* file_level_metadata, int size);
  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(GeneratedMessageReflection);
};

typedef void (*InitFunc)();

struct PROTOBUF_EXPORT AssignDescriptorsTable {
  once_flag once;
  InitFunc add_descriptors;
  const char* filename;
  const MigrationSchema* schemas;
  const Message* const* default_instances;
  const uint32* offsets;
  // update the following descriptor arrays.
  Metadata* file_level_metadata;
  int num_messages;
  const EnumDescriptor** file_level_enum_descriptors;
  const ServiceDescriptor** file_level_service_descriptors;
};

void PROTOBUF_EXPORT AssignDescriptors(AssignDescriptorsTable* table);

struct PROTOBUF_EXPORT DescriptorTable {
  bool is_initialized;
  InitFunc init_defaults;
  const char* descriptor;
  const char* filename;
  AssignDescriptorsTable* assign_descriptors_table;
  int size;  // of serialized descriptor
};

void PROTOBUF_EXPORT AddDescriptors(DescriptorTable* table,
                                    const InitFunc* deps, int num_deps);

// These cannot be in lite so we put them in the reflection.
PROTOBUF_EXPORT void UnknownFieldSetSerializer(const uint8* base, uint32 offset,
                                               uint32 tag, uint32 has_offset,
                                               io::CodedOutputStream* output);

}  // namespace internal
}  // namespace protobuf
}  // namespace google

#include <google/protobuf/port_undef.inc>

#endif  // GOOGLE_PROTOBUF_GENERATED_MESSAGE_REFLECTION_H__