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/* Copyright (C) 2010 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_NETWORK_SERIALIZATION
#define INCLUDED_NETWORK_SERIALIZATION
#define Serialize_int_1(_pos, _val) \
STMT( *((_pos)++) = (u8)((_val)&0xff); )
#define Serialize_int_2(_pos, _val) STMT(\
Serialize_int_1(_pos, (_val)>>8); \
Serialize_int_1(_pos, (_val)); \
)
#define Serialize_int_3(_pos, _val) STMT(\
Serialize_int_1(_pos, (_val)>>16); \
Serialize_int_2(_pos, (_val)); \
)
#define Serialize_int_4(_pos, _val) STMT(\
Serialize_int_1(_pos, (_val)>>24); \
Serialize_int_3(_pos, (_val)); \
)
#define Serialize_int_8(_pos, _val) STMT(\
Serialize_int_4(_pos, (_val)>>32); \
Serialize_int_4(_pos, (_val)); \
)
#define __shift_de(_pos, _val) STMT( \
(_val) <<= 8; \
(_val) += *((_pos)++); )
#define Deserialize_int_1(_pos, _val) STMT(\
(_val) = *((_pos)++); )
#define Deserialize_int_2(_pos, _val) STMT(\
Deserialize_int_1(_pos, _val); \
__shift_de(_pos, _val); )
#define Deserialize_int_3(_pos, _val) STMT(\
Deserialize_int_2(_pos, _val); \
__shift_de(_pos, _val); )
#define Deserialize_int_4(_pos, _val) STMT(\
Deserialize_int_3(_pos, _val); \
__shift_de(_pos, _val); )
#define Deserialize_int_8(_pos, _val) STMT(\
uint32 _v1; uint32 _v2; \
Deserialize_int_4(_pos, _v1); \
Deserialize_int_4(_pos, _v2); \
_val = _v1; \
_val <<= 32; /* janwas: careful! (uint32 << 32) = 0 */ \
_val |= _v2; )
/**
* An interface for serializable objects. For a serializable object to be usable
* as a network message field, it must have a constructor without arguments.
*/
class ISerializable
{
public:
virtual ~ISerializable() {}
/**
* Return the length of the serialized form of this object
*/
virtual size_t GetSerializedLength() const = 0;
/**
* Serialize the object into the passed buffer.
*
* @return a pointer to the location in the buffer right after the
* serialized object
*/
virtual u8 *Serialize(u8 *buffer) const = 0;
/**
* Deserialize the object (i.e. read in data from the buffer and initialize
* the object's fields). Note that it is up to the deserializer to detect
* errors in data format.
*
* @param buffer A pointer pointing to the start of the serialized data.
* @param end A pointer to the end of the message.
*
* @returns a pointer to the location in the buffer right after the
* serialized object, or NULL if there was a data format error
*/
virtual const u8 *Deserialize(const u8 *buffer, const u8 *end) = 0;
};
#endif
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