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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Protobuf Messages over IPC
//
// Protobuf messages are registered with IPC_PROTOBUF_MESSAGE_TRAITS_BEGIN() and
// friends in much the same way as other externally-defined structs (see
// ipc/ipc_message_macros.h). These macros also cause only registration of the
// protobuf message type IPC with message generation. Within matching calls to
// _BEGIN() and _END(), one may use:
// - IPC_PROTOBUF_MESSAGE_TRAITS_OPTIONAL_FUNDAMENTAL_MEMBER() to register an
// optional field of fundamental type (any scalar message field type save
// "string" and "bytes").
// - IPC_PROTOBUF_MESSAGE_TRAITS_OPTIONAL_COMPLEX_MEMBER() to register an
// optional field of complex type (scalar message field type "string" or
// "bytes", or another message type).
// - IPC_PROTOBUF_MESSAGE_TRAITS_REPEATED_COMPLEX_MEMBER() to register a
// repeated field of complex type (scalar message field type "string" or
// "bytes", or another message type).
//
// Enum types in protobuf messages are registered with
// IPC_ENUM_TRAITS_VALIDATE() as with any other enum. In this case, the
// validation expression should be the _IsValid() function provided by the
// generated protobuf code. For example:
//
// IPC_ENUM_TRAITS_VALIDATE(MyEnumType, MyEnumType_IsValid(value))
#ifndef CHROME_COMMON_SAFE_BROWSING_IPC_PROTOBUF_MESSAGE_MACROS_H_
#define CHROME_COMMON_SAFE_BROWSING_IPC_PROTOBUF_MESSAGE_MACROS_H_
#include <string>
#define IPC_PROTOBUF_MESSAGE_TRAITS_BEGIN(message_name) \
namespace IPC { \
template <> \
struct IPC_MESSAGE_EXPORT ParamTraits<message_name> { \
typedef message_name param_type; \
static void Write(base::Pickle* m, const param_type& p); \
static bool Read(const base::Pickle* m, \
base::PickleIterator* iter, \
param_type* p); \
static void Log(const param_type& p, std::string* l); \
\
private: \
template <class P> \
static bool ReadParamF(const base::Pickle* m, \
base::PickleIterator* iter, \
param_type* p, \
void (param_type::*setter_function)(P)); \
}; \
} // namespace IPC
#define IPC_PROTOBUF_MESSAGE_TRAITS_OPTIONAL_FUNDAMENTAL_MEMBER(name)
#define IPC_PROTOBUF_MESSAGE_TRAITS_OPTIONAL_COMPLEX_MEMBER(name)
#define IPC_PROTOBUF_MESSAGE_TRAITS_REPEATED_COMPLEX_MEMBER(name)
#define IPC_PROTOBUF_MESSAGE_TRAITS_END()
#endif // CHROME_COMMON_SAFE_BROWSING_IPC_PROTOBUF_MESSAGE_MACROS_H_
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