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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef SERIALIZER_IMPL_H
#define SERIALIZER_IMPL_H
#include "ISerializer.h"
#include "creg_cond.h"
#ifdef USING_CREG
#include <map>
#include <vector>
#include <deque>
#include <istream>
namespace creg {
/**
* Output stream serializer
* Usage: create an instance of this class and call SavePackage
* @see SavePackage
*/
class COutputStreamSerializer : public ISerializer
{
protected:
struct ObjectMember {
Class::Member* member;
int memberId;
int size;
};
struct ObjectMemberGroup {
Class* membersClass;
std::vector<COutputStreamSerializer::ObjectMember> members;
int size;
};
struct ObjectRef {
ObjectRef() {
ptr = 0;
id=0;
classIndex=0;
isEmbedded=false;
class_=0;
}
ObjectRef(void* ptr, int id, bool isEmbedded, Class* class_) {
this->ptr = ptr;
this->id=id;
classIndex=0;
this->isEmbedded=isEmbedded;
this->class_=class_;
}
ObjectRef(const ObjectRef&src) :memberGroups(src.memberGroups){
ptr=src.ptr;
id=src.id;
classIndex=src.classIndex;
isEmbedded=src.isEmbedded;
class_=src.class_;
}
void* ptr;
int id, classIndex;
bool isEmbedded;
Class* class_;
std::vector<COutputStreamSerializer::ObjectMemberGroup> memberGroups;
bool isThisObject(void* objPtr, Class* objClass, bool objEmbedded) const
{
if (ptr != objPtr) return false;
if (class_ == objClass) return true;
if (isEmbedded && objEmbedded) return false;
if (!objEmbedded) {
for (Class* base=class_->base(); base; base=base->base())
if (base == objClass) return true;
}
if (!isEmbedded) {
for (Class* base=objClass->base(); base; base=base->base())
if (base == class_) return true;
}
return false;
}
};
// Temporary class reference
struct ClassRef;
std::ostream* stream;
std::map<void*,std::vector<ObjectRef*> > ptrToId;
std::deque<ObjectRef> objects;
std::vector<ObjectRef*> pendingObjects; // these objects still have to be saved
std::map<Class*, int> classSizes;
std::map<Class*, int> classCounts;
// Serialize all class names
void WriteObjectInfo();
// Helper for instance/ptr saving
void WriteObjectRef(void* inst, Class* cls, bool embedded);
ObjectRef* FindObjectRef(void* inst, Class* objClass, bool isEmbedded);
void SerializeObject(Class* c, void* ptr, ObjectRef* objr);
public:
COutputStreamSerializer();
/** Create a package of the given root object and all the objects that it references
* @param s stream to serialize the data to
* @param rootObj the rootObj: the starting point for finding all the objects to save
* @param cls the class of the root object
* This method throws an std::runtime_error when something goes wrong
*/
void SavePackage(std::ostream* s, void* rootObj, Class* cls);
/** @see ISerializer::IsWriting */
bool IsWriting() override;
/** @see ISerializer::SerializeObjectPtr */
void SerializeObjectPtr(void** ptr, Class* cls) override;
/** @see ISerializer::SerializeObjectInstance */
void SerializeObjectInstance(void* inst, Class* cls) override;
/** @see ISerializer::Serialize */
void Serialize(void* data, int byteSize) override;
/** @see ISerializer::SerializeInt */
void SerializeInt(void* data, int byteSize) override;
/** Empty function, only applies to loading */
void AddPostLoadCallback(void (*cb)(void* d), void* d) override {}
};
/** Input stream serializer
* Usage: Create an instance of this class and call LoadPackage
* @see LoadPackage
*/
class CInputStreamSerializer : public ISerializer
{
protected:
std::istream* stream;
std::vector<Class*> classRefs;
struct UnfixedPtr {
void** ptrAddr;
int objID;
};
std::vector<UnfixedPtr> unfixedPointers; // pointers to embedded objects that haven't been filled yet, because they are not yet loaded
struct StoredObject
{
void* obj;
int classRef;
bool isEmbedded;
};
std::vector<StoredObject> objects;
struct PostLoadCallback
{
void (*cb)(void* d);
void* userdata;
};
std::vector<PostLoadCallback> callbacks;
void SerializeObject(Class* c, void* ptr);
public:
CInputStreamSerializer();
~CInputStreamSerializer();
/** @see ISerializer::IsWriting */
bool IsWriting() override;
/** @see ISerializer::SerializeObjectPtr */
void SerializeObjectPtr(void** ptr, Class* cls) override;
/** @see ISerializer::SerializeObjectInstance */
void SerializeObjectInstance(void* inst, Class* cls) override;
/** @see ISerializer::Serialize */
void Serialize(void* data, int byteSize) override;
/** @see ISerializer::SerializeInt */
void SerializeInt(void* data, int byteSize) override;
/** @see ISerializer::AddPostLoadCallback */
void AddPostLoadCallback(void (*cb)(void* userdata), void* userdata) override;
/** Load a package that is saved by CInputStreamSerializer
* @param s the input stream to read from
* @param root the root object address will be assigned to this
* @param rootCls the root object class will be assigned to this
* This method throws an std::runtime_error when something goes wrong */
void LoadPackage(std::istream* s, void*& root, Class*& rootCls);
};
}
#endif //USING_CREG
#endif //SERIALIZER_IMPL_H
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