forked from 0ad/0ad
353 lines
8.9 KiB
C++
353 lines
8.9 KiB
C++
#include "Serialization.h"
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#include <vector>
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// If included from within the NMT Creation process, perform a pass
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#ifdef CREATING_NMT
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#include NMT_CREATE_HEADER_NAME
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#undef START_NMTS
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#undef END_NMTS
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#undef START_NMT_CLASS
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#undef START_NMT_CLASS_DERIVED
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#undef NMT_FIELD_INT
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#undef NMT_FIELD
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#undef NMT_START_ARRAY
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#undef NMT_END_ARRAY
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#undef END_NMT_CLASS
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#else
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// If not within the creation process, and called with argument, perform the
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// creation process with the header specified
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#ifdef NMT_CREATE_HEADER_NAME
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#ifndef ARRAY_STRUCT_PREFIX
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#define ARRAY_STRUCT_PREFIX(_nm) S_##_nm
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#endif
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#define CREATING_NMT
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/*************************************************************************/
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// Pass 1, class definition
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#define NMT_CREATOR_PASS_CLASSDEF
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#define START_NMTS()
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#define END_NMTS()
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#define START_NMT_CLASS(_nm, _tp) \
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START_NMT_CLASS_DERIVED(CNetMessage, _nm, _tp)
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/**
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* Start the definition of a network message type.
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*
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* @param _base The name of the base class of the message
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* @param _nm The name of the class
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* @param _tp The NetMessageType associated with the class. It is *not* safe to
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* have several classes with the same value of _tp in the same executable
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*/
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#define START_NMT_CLASS_DERIVED(_base, _nm, _tp) \
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CNetMessage *Deserialize##_nm(const u8 *, size_t); \
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class _nm: public _base \
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{ \
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protected: \
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_nm(NetMessageType type): _base(type) {}\
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\
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/* This one is for subclasses that want to use the base class' string */ \
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/* converters to get SubMessage { <parent fields>, ... } */ \
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CStr ToStringRaw() const;\
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public: \
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_nm(): _base(_tp) {} \
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virtual size_t GetSerializedLength() const; \
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virtual u8 *Serialize(u8 *buffer) const; \
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virtual const u8 *Deserialize(const u8 *pos, const u8 *end); \
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virtual CStr ToString() const; \
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inline operator CStr () const \
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{ return ToString(); }
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/**
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* Add an integer field to the message type.
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*
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* @param _nm The name of the field
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* @param _hosttp The local type of the field (the data type used in the field
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* definition)
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* @param _netsz The number of bytes that should be serialized. If the variable
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* has a value larger than the maximum value of the specified network size,
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* higher order bytes will be discarded.
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*/
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#define NMT_FIELD_INT(_nm, _hosttp, _netsz) \
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_hosttp _nm;
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/**
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* Add a generic field to the message type. The data type must be a class
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* implementing the ISerializable interface
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*
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* @param _tp The local data type of the field
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* @param _nm The name of the field
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* @see ISerializable
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*/
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#define NMT_FIELD(_tp, _nm) \
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_tp _nm;
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#define NMT_START_ARRAY(_nm) \
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struct ARRAY_STRUCT_PREFIX(_nm); \
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std::vector <ARRAY_STRUCT_PREFIX(_nm)> _nm; \
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struct ARRAY_STRUCT_PREFIX(_nm) {
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#define NMT_END_ARRAY() \
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};
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#define END_NMT_CLASS() };
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#include "NMTCreator.h"
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#undef NMT_CREATOR_PASS_CLASSDEF
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#ifdef NMT_CREATOR_IMPLEMENT
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#include "StringConverters.h"
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/*************************************************************************/
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// Pass 2, GetSerializedLength
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#define NMT_CREATOR_PASS_GETLENGTH
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#define START_NMTS()
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#define END_NMTS()
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#define START_NMT_CLASS(_nm, _tp) \
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START_NMT_CLASS_DERIVED(CNetMessage, _nm, _tp)
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#define START_NMT_CLASS_DERIVED(_base, _nm, _tp) \
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size_t _nm::GetSerializedLength() const \
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{ \
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size_t ret=_base::GetSerializedLength(); \
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const _nm *thiz=this;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_START_ARRAY(_nm) \
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std::vector <ARRAY_STRUCT_PREFIX(_nm)>::const_iterator it=_nm.begin(); \
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while (it != _nm.end()) \
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{ \
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const ARRAY_STRUCT_PREFIX(_nm) *thiz=&*it;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_END_ARRAY() \
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++it; \
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}
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#define NMT_FIELD_INT(_nm, _hosttp, _netsz) \
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ret += _netsz;
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#define NMT_FIELD(_tp, _nm) \
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ret += thiz->_nm.GetSerializedLength();
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#define END_NMT_CLASS() \
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return ret; \
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};
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#include "NMTCreator.h"
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#undef NMT_CREATOR_PASS_GETLENGTH
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/*************************************************************************/
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// Pass 3, Serialize
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#define NMT_CREATOR_PASS_SERIALIZE
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#define START_NMTS()
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#define END_NMTS()
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#define START_NMT_CLASS(_nm, _tp) \
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START_NMT_CLASS_DERIVED(CNetMessage, _nm, _tp)
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#define START_NMT_CLASS_DERIVED(_base, _nm, _tp) \
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u8 *_nm::Serialize(u8 *buffer) const \
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{ \
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/*printf("In " #_nm "::Serialize()\n");*/ \
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u8 *pos=_base::Serialize(buffer); \
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const _nm *thiz=this;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_START_ARRAY(_nm) \
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std::vector <ARRAY_STRUCT_PREFIX(_nm)>::const_iterator it=_nm.begin(); \
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while (it != _nm.end()) \
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{ \
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const ARRAY_STRUCT_PREFIX(_nm) *thiz=&*it;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_END_ARRAY() \
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++it; \
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}
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#define NMT_FIELD_INT(_nm, _hosttp, _netsz) \
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Serialize_int_##_netsz(pos, thiz->_nm); \
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#define NMT_FIELD(_tp, _nm) \
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pos=thiz->_nm.Serialize(pos);
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#define END_NMT_CLASS() \
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return pos; \
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}
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#include "NMTCreator.h"
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#undef NMT_CREATOR_PASS_SERIALIZE
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/*************************************************************************/
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// Pass 4, Deserialize
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#define NMT_CREATOR_PASS_DESERIALIZE
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#define START_NMTS()
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#define END_NMTS()
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#define BAIL_DESERIALIZER return NULL
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#define START_NMT_CLASS(_nm, _tp) \
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START_NMT_CLASS_DERIVED(CNetMessage, _nm, _tp)
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#define START_NMT_CLASS_DERIVED(_base, _nm, _tp) \
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CNetMessage *Deserialize##_nm(const u8 *buffer, size_t length) \
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{ \
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_nm *ret=new _nm(); \
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if (ret->Deserialize(buffer, buffer+length)) \
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return ret; \
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else \
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{ delete ret; return NULL; } \
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} \
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const u8 *_nm::Deserialize(const u8 *pos, const u8 *end) \
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{ \
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pos=_base::Deserialize(pos, end); \
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_nm *thiz=this; \
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/*printf("In Deserialize" #_nm "\n"); */\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_START_ARRAY(_nm) \
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while (pos < end) \
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{ \
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ARRAY_STRUCT_PREFIX(_nm) *thiz=&*_nm.insert(_nm.end(), ARRAY_STRUCT_PREFIX(_nm)());\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_END_ARRAY() \
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}
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#define NMT_FIELD_INT(_nm, _hosttp, _netsz) \
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if (pos+_netsz > end) BAIL_DESERIALIZER; \
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Deserialize_int_##_netsz(pos, thiz->_nm); \
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/*printf("\t" #_nm " == 0x%x\n", thiz->_nm);*/
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#define NMT_FIELD(_tp, _nm) \
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if ((pos=thiz->_nm.Deserialize(pos, end)) == NULL) BAIL_DESERIALIZER;
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#define END_NMT_CLASS() \
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return pos; \
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}
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#include "NMTCreator.h"
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#undef BAIL_DESERIALIZER
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#undef NMT_CREATOR_PASS_DESERIALIZE
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/*************************************************************************/
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// Pass 5, Deserializer Registration
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#define NMT_CREATOR_PASS_REGISTRATION
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//#define START_NMTS() SNetMessageDeserializerRegistration g_DeserializerRegistrations[] = {
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//#define END_NMTS() { NMT_INVALID, NULL } };
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#define START_NMTS()
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#define END_NMTS()
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#define START_NMT_CLASS(_nm, _tp) \
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START_NMT_CLASS_DERIVED(CNetMessage, _nm, _tp)
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//#define START_NMT_CLASS_DERIVED(_base, _nm, _tp) \
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// { _tp, Deserialize##_nm },
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#define START_NMT_CLASS_DERIVED(_base, _nm, _tp)
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#define NMT_START_ARRAY(_nm)
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#define NMT_END_ARRAY()
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#define NMT_FIELD_INT(_nm, _hosttp, _netsz)
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#define NMT_FIELD(_tp, _nm)
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#define END_NMT_CLASS()
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#include "NMTCreator.h"
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#undef NMT_CREATOR_PASS_REGISTRATION
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/*************************************************************************/
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// Pass 6, String Representation
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#define _T(s) s
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// PT: I'm not sure whether this is correct - it appears that this code
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// relied on CStr.h leaving _T defined in ASCII mode, so I'm not sure
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// why the macro is actually used at all...
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#define START_NMTS()
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#define END_NMTS()
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#define START_NMT_CLASS(_nm, _tp) \
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CStr _nm::ToString() const \
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{ \
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CStr ret=#_nm _T(" { "); \
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return ret + ToStringRaw() + _T(" }"); \
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} \
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CStr _nm::ToStringRaw() const \
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{ \
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CStr ret; \
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const _nm *thiz=this;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define START_NMT_CLASS_DERIVED(_base, _nm, _tp) \
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CStr _nm::ToString() const \
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{ \
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CStr ret=#_nm _T(" { "); \
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return ret + ToStringRaw() + _T(" }"); \
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} \
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CStr _nm::ToStringRaw() const \
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{ \
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CStr ret=_base::ToStringRaw() + _T(", "); \
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const _nm *thiz=this;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_START_ARRAY(_nm) \
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ret+=#_nm _T(": { "); \
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std::vector < ARRAY_STRUCT_PREFIX(_nm) >::const_iterator it=_nm.begin(); \
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while (it != _nm.end()) \
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{ \
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ret+=_T(" { "); \
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const ARRAY_STRUCT_PREFIX(_nm) *thiz=&*it;\
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UNUSED2(thiz); // preempt any "unused" warning
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#define NMT_END_ARRAY() \
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++it; \
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ret=ret.substr(0, ret.length()-2)+_T(" }, "); \
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} \
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ret=ret.substr(0, ret.length()-2)+_T(" }, ");
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#define NMT_FIELD_INT(_nm, _hosttp, _netsz) \
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ret += #_nm _T(": "); \
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ret += NetMessageStringConvert(thiz->_nm); \
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ret += _T(", ");
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#define NMT_FIELD(_tp, _nm) \
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ret += #_nm _T(": "); \
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ret += NetMessageStringConvert(thiz->_nm); \
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ret += _T(", ");
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#define END_NMT_CLASS() \
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return ret.substr(0, ret.length()-2); \
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}
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#include "NMTCreator.h"
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#endif // #ifdef NMT_CREATOR_IMPLEMENT
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/*************************************************************************/
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// Cleanup
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#undef NMT_CREATE_HEADER_NAME
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#undef NMT_CREATOR_IMPLEMENT
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#undef CREATING_NMT
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#endif // #ifdef NMT_CREATE_HEADER_NAME
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#endif // #ifndef CREATING_NMT
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