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//
// upb - a minimalist implementation of protocol buffers.
//
// Copyright (c) 2011 Google Inc. See LICENSE for details.
// Author: Josh Haberman <jhaberman@gmail.com>
// Routines for reading and writing message data to an in-memory structure,
// similar to a C struct.
//
// upb does not define one single message object that everyone must use.
// Rather it defines an abstract interface for reading and writing members
// of a message object, and all of the parsers and serializers use this
// abstract interface. This allows upb's parsers and serializers to be used
// regardless of what memory management scheme or synchronization model the
// application is using.
//
// A standard set of accessors is provided for doing simple reads and writes at
// a known offset into the message. These accessors should be used when
// possible, because they are specially optimized -- for example, the JIT can
// recognize them and emit specialized code instead of having to call the
// function at all. The application can substitute its own accessors when the
// standard accessors are not suitable.
#ifndef UPB_MSG_HPP
#define UPB_MSG_HPP
#include "upb/msg.h"
#include "upb/handlers.hpp"
namespace upb {
typedef upb_accessor_vtbl AccessorVTable;
// Registers handlers for writing into a message of the given type using
// whatever accessors it has defined.
inline MessageHandlers* RegisterWriteHandlers(upb::Handlers* handlers,
const upb::MessageDef* md) {
return MessageHandlers::Cast(
upb_accessors_reghandlers(handlers, md));
}
template <typename T> static FieldHandlers::ValueHandler* GetValueHandler();
// A handy templated function that will retrieve a value handler for a given
// C++ type.
#define GET_VALUE_HANDLER(type, ctype) \
template <> \
inline FieldHandlers::ValueHandler* GetValueHandler<ctype>() { \
return &upb_stdmsg_set ## type; \
}
GET_VALUE_HANDLER(double, double);
GET_VALUE_HANDLER(float, float);
GET_VALUE_HANDLER(uint64, uint64_t);
GET_VALUE_HANDLER(uint32, uint32_t);
GET_VALUE_HANDLER(int64, int64_t);
GET_VALUE_HANDLER(int32, int32_t);
GET_VALUE_HANDLER(bool, bool);
#undef GET_VALUE_HANDLER
} // namespace
#endif
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