qzdoom/src/serializer.cpp

#define RAPIDJSON_48BITPOINTER_OPTIMIZATION 0	// disable this insanity which is bound to make the code break over time.
#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 1
#define RAPIDJSON_HAS_CXX11_RANGE_FOR 1
#define RAPIDJSON_PARSE_DEFAULT_FLAGS kParseFullPrecisionFlag

//#define PRETTY

#include "rapidjson/rapidjson.h"
#include "rapidjson/writer.h"
#include "rapidjson/prettywriter.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/document.h"
#include "serializer.h"
#include "r_data/colormaps.h"
#include "r_data/r_interpolate.h"
#include "r_defs.h"
#include "r_state.h"
#include "p_lnspec.h"
#include "i_system.h"
#include "w_wad.h"
#include "p_terrain.h"
#include "c_dispatch.h"
#include "p_setup.h"
#include "p_conversation.h"
#include "dsectoreffect.h"
#include "d_player.h"
#include "r_data/r_interpolate.h"
#include "g_shared/a_sharedglobal.h"

char nulspace[1024 * 1024 * 4];

//==========================================================================
//
//
//
//==========================================================================

struct FJSONObject
{
	rapidjson::Value *mObject;
	rapidjson::Value::MemberIterator mIterator;
	int mIndex;

	FJSONObject(rapidjson::Value *v)
	{
		mObject = v;
		if (v->IsObject()) mIterator = v->MemberBegin();
		else if (v->IsArray()) mIndex = 0;
	}
};

//==========================================================================
//
// some wrapper stuff to keep the RapidJSON dependencies out of the global headers.
// FSerializer should not expose any of this.
//
//==========================================================================

struct FWriter
{
	// Since this is done by template parameters, we'd have to template the entire serializer to allow this switch at run time. Argh!
#ifndef PRETTY
	typedef rapidjson::Writer<rapidjson::StringBuffer, rapidjson::ASCII<> > Writer;
#else
	typedef rapidjson::PrettyWriter<rapidjson::StringBuffer, rapidjson::ASCII<> > Writer;
#endif

	Writer mWriter;
	TArray<bool> mInObject;
	rapidjson::StringBuffer mOutString;
	TArray<DObject *> mDObjects;
	TMap<DObject *, int> mObjectMap;
	
	FWriter() : mWriter(mOutString)
	{}

	bool inObject() const
	{
		return mInObject.Size() > 0 && mInObject.Last();
	}
};

//==========================================================================
//
//
//
//==========================================================================

struct FReader
{
	TArray<FJSONObject> mObjects;
	rapidjson::Value mDocObj;	// just because RapidJSON is stupid and does not allow direct access to what's in the document.

	FReader(const char *buffer, size_t length)
	{
		rapidjson::Document doc;
		doc.Parse(buffer, length);
		mDocObj = doc.GetObject();
		mObjects.Push(FJSONObject(&mDocObj));
	}
	
	rapidjson::Value *FindKey(const char *key)
	{
		FJSONObject &obj = mObjects.Last();
		
		if (obj.mObject->IsObject())
		{
			if (obj.mIterator != obj.mObject->MemberEnd())
			{
				if (!strcmp(key, obj.mIterator->name.GetString()))
				{
					return &(obj.mIterator++)->value;
				}
			}
		}
		else if (obj.mObject->IsArray())
		{
			return &obj.mObject[obj.mIndex++];
		}
		return nullptr;
	}
};


//==========================================================================
//
//
//
//==========================================================================

bool FSerializer::OpenWriter()
{
	if (w != nullptr || r != nullptr) return false;
	w = new FWriter;

	return true;
}

//==========================================================================
//
//
//
//==========================================================================

bool FSerializer::OpenReader(const char *buffer, size_t length)
{
	if (w != nullptr || r != nullptr) return false;
	r = new FReader(buffer, length);
	return true;
}

//==========================================================================
//
//
//
//==========================================================================

void FSerializer::Close()
{
	if (w != nullptr)
	{
		delete w;
		w = nullptr;
	}
	if (r != nullptr)
	{
		delete r;
		r = nullptr;
	}
}

//==========================================================================
//
//
//
//==========================================================================

int FSerializer::ArraySize()
{
	if (r != nullptr && r->mObjects.Last().mObject->IsArray())
	{
		return r->mObjects.Last().mObject->Size();
	}
	else
	{
		return 0;
	}
}

//==========================================================================
//
//
//
//==========================================================================

bool FSerializer::canSkip() const
{
	return isWriting() && w->inObject();
}

//==========================================================================
//
//
//
//==========================================================================

void FSerializer::WriteKey(const char *key)
{
	if (isWriting() && w->inObject())
	{
		if (key == nullptr)
		{
			I_Error("missing element name");
		}
		w->mWriter.Key(key);
	}
}

//==========================================================================
//
//
//
//==========================================================================

bool FSerializer::BeginObject(const char *name)
{
	if (isWriting())
	{
		WriteKey(name);
		w->mWriter.StartObject();
		w->mInObject.Push(true);
	}
	else
	{
		auto val = r->FindKey(name);
		if (val != nullptr)
		{
			if (val->IsObject())
			{
				r->mObjects.Push(FJSONObject(val));
			}
			else
			{
				I_Error("Object expected for '%s'", name);
			}
		}
		else
		{
			return false;
		}
	}
	return true;
}

//==========================================================================
//
//
//
//==========================================================================

void FSerializer::EndObject()
{
	if (isWriting())
	{
		if (w->inObject())
		{
			w->mWriter.EndObject();
			w->mInObject.Pop();
		}
		else
		{
			I_Error("EndObject call not inside an object");
		}
	}
	else
	{
		r->mObjects.Pop();
	}
}

//==========================================================================
//
//
//
//==========================================================================

bool FSerializer::BeginArray(const char *name)
{
	if (isWriting())
	{
		WriteKey(name);
		w->mWriter.StartArray();
		w->mInObject.Push(false);
	}
	else
	{
		auto val = r->FindKey(name);
		if (val != nullptr)
		{
			if (val->IsArray())
			{
				r->mObjects.Push(FJSONObject(val));
			}
			else
			{
				I_Error("Array expected for '%s'", name);
			}
		}
		else
		{
			return false;
		}
	}
	return true;
}

//==========================================================================
//
//
//
//==========================================================================

void FSerializer::EndArray()
{
	if (isWriting())
	{
		if (!w->inObject())
		{
			w->mWriter.EndArray();
			w->mInObject.Pop();
		}
		else
		{
			I_Error("EndArray call not inside an array");
		}
	}
	else
	{
		r->mObjects.Pop();
	}
}

//==========================================================================
//
// Special handler for args (because ACS specials' arg0 needs special treatment.)
//
//==========================================================================

FSerializer &FSerializer::Args(const char *key, int *args, int *defargs, int special)
{
	if (isWriting())
	{
		if (w->inObject() && defargs != nullptr && !memcmp(args, defargs, 5 * sizeof(int)))
		{
			return *this;
		}

		WriteKey(key);
		w->mWriter.StartArray();
		for (int i = 0; i < 5; i++)
		{
			if (i == 0 && args[i] < 0 && P_IsACSSpecial(special))
			{
				w->mWriter.String(FName(ENamedName(-args[i])).GetChars());
			}
			else
			{
				w->mWriter.Int(args[i]);
			}
		}
		w->mWriter.EndArray();
	}
	else
	{
		auto val = r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsArray())
			{
				unsigned int cnt = MIN<unsigned>(val->Size(), 5);
				for (unsigned int i = 0; i < cnt; i++)
				{
					const rapidjson::Value &aval = (*val)[i];
					if (aval.IsInt())
					{
						args[i] = aval.GetInt();
					}
					else if (i == 0 && aval.IsString())
					{
						args[i] = -FName(aval.GetString());
					}
					else
					{
						I_Error("Integer expected for '%s[%d]'", key, i);
					}
				}
			}
			else
			{
				I_Error("array expected for '%s'", key);
			}
		}
	}
	return *this;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &FSerializer::Terrain(const char *key, int &terrain, int *def)
{
	if (isWriting() && def != nullptr && terrain == *def)
	{
		return *this;
	}
	FName terr = P_GetTerrainName(terrain);
	Serialize(*this, key, terr, nullptr);
	if (isReading())
	{
		terrain = P_FindTerrain(terr);
	}
	return *this;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &FSerializer::Sprite(const char *key, int32_t &spritenum, int32_t *def)
{
	if (isWriting())
	{
		if (w->inObject() && def != nullptr && *def == spritenum) return *this;
		WriteKey(key);
		w->mWriter.String(sprites[spritenum].name, 4);
	}
	else
	{
		auto val = r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsString())
			{
				int name = *reinterpret_cast<const int*>(val->GetString());
				for (auto hint = NumStdSprites; hint-- != 0; )
				{
					if (sprites[hint].dwName == name)
					{
						spritenum = hint;
						break;
					}
				}
			}
		}
	}
	return *this;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &FSerializer::StringPtr(const char *key, const char *&charptr)
{
	if (isWriting())
	{
		WriteKey(key);
		w->mWriter.String(charptr);
	}
	else
	{
		auto val = r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsString())
			{
				charptr = val->GetString();
			}
		}
	}
	return *this;
}

//==========================================================================
//
// Writes out all collected objects
//
//==========================================================================

void FSerializer::WriteObjects()
{
	if (isWriting())
	{
		BeginArray("objects");
		for (unsigned i = 0; i < w->mDObjects.Size(); i++)
		{
			BeginObject(nullptr);
			WriteKey("classtype");
			w->mWriter.String(w->mDObjects[i]->GetClass()->TypeName.GetChars());
			w->mDObjects[i]->SerializeUserVars(*this);
			w->mDObjects[i]->Serialize(*this);
			w->mDObjects[i]->CheckIfSerialized();
			EndObject();
		}
		EndArray();
	}
}

const char *FSerializer::GetOutput(unsigned *len)
{
	if (len != nullptr)
	{
		*len = (unsigned)w->mOutString.GetSize();
	}
	return w->mOutString.GetString();
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, bool &value, bool *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.Bool(value);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsBool())
			{
				value = val->GetBool();
			}
			else
			{
				I_Error("boolean type expected for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, int64_t &value, int64_t *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.Int64(value);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsInt64())
			{
				value = val->GetInt64();
			}
			else
			{
				I_Error("integer type expected for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, uint64_t &value, uint64_t *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.Uint64(value);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsUint64())
			{
				value = val->GetUint64();
			}
			else
			{
				I_Error("integer type expected for '%s'", key);
			}
		}
	}
	return arc;
}


//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, int32_t &value, int32_t *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.Int(value);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsInt())
			{
				value = val->GetInt();
			}
			else
			{
				I_Error("integer type expected for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, uint32_t &value, uint32_t *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.Uint(value);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsUint())
			{
				value = val->GetUint();
			}
			else
			{
				I_Error("integer type expected for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, int8_t &value, int8_t *defval)
{
	int32_t vv = value;
	int32_t vvd = defval? *defval : value-1;
	Serialize(arc, key, vv, &vvd);
	value = (int8_t)vv;
	return arc;
}

FSerializer &Serialize(FSerializer &arc, const char *key, uint8_t &value, uint8_t *defval)
{
	uint32_t vv = value;
	uint32_t vvd = defval ? *defval : value - 1;
	Serialize(arc, key, vv, &vvd);
	value = (uint8_t)vv;
	return arc;
}

FSerializer &Serialize(FSerializer &arc, const char *key, int16_t &value, int16_t *defval)
{
	int32_t vv = value;
	int32_t vvd = defval ? *defval : value - 1;
	Serialize(arc, key, vv, &vvd);
	value = (int16_t)vv;
	return arc;
}

FSerializer &Serialize(FSerializer &arc, const char *key, uint16_t &value, uint16_t *defval)
{
	uint32_t vv = value;
	uint32_t vvd = defval ? *defval : value - 1;
	Serialize(arc, key, vv, &vvd);
	value = (uint16_t)vv;
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, double &value, double *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.Double(value);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsDouble())
			{
				value = val->GetDouble();
			}
			else
			{
				I_Error("float type expected for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, float &value, float *defval)
{
	double vv = value;
	double vvd = defval ? *defval : value - 1;
	Serialize(arc, key, vv, &vvd);
	value = (float)vv;
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

template<class T>
FSerializer &SerializePointer(FSerializer &arc, const char *key, T *&value, T **defval, T *base)
{
	if (arc.isReading() || !arc.w->inObject() || defval == nullptr || value != *defval)
	{
		ptrdiff_t vv = value == nullptr ? -1 : value - base;
		Serialize(arc, key, vv, nullptr);
		value = vv < 0 ? nullptr : base + vv;
	}
	return arc;
}

FSerializer &Serialize(FSerializer &arc, const char *key, side_t *&value, side_t **defval)
{
	return SerializePointer(arc, key, value, defval, sides);
}

FSerializer &Serialize(FSerializer &arc, const char *key, sector_t *&value, sector_t **defval)
{
	return SerializePointer(arc, key, value, defval, sectors);
}

FSerializer &Serialize(FSerializer &arc, const char *key, player_t *&value, player_t **defval)
{
	return SerializePointer(arc, key, value, defval, players);
}

FSerializer &Serialize(FSerializer &arc, const char *key, line_t *&value, line_t **defval)
{
	return SerializePointer(arc, key, value, defval, lines);
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FTextureID &value, FTextureID *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			if (!value.Exists())
			{
				arc.WriteKey(key);
				arc.w->mWriter.Null();
				return arc;
			}
			if (value.isNull())
			{
				// save 'no texture' in a more space saving way
				arc.WriteKey(key);
				arc.w->mWriter.Int(0);
				return arc;
			}
			FTextureID chk = value;
			if (chk.GetIndex() >= TexMan.NumTextures()) chk.SetNull();
			FTexture *pic = TexMan[chk];
			const char *name;

			if (Wads.GetLinkedTexture(pic->SourceLump) == pic)
			{
				name = Wads.GetLumpFullName(pic->SourceLump);
			}
			else
			{
				name = pic->Name;
			}
			arc.WriteKey(key);
			arc.w->mWriter.StartArray();
			arc.w->mWriter.String(name);
			arc.w->mWriter.Int(pic->UseType);
			arc.w->mWriter.EndArray();
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsObject())
			{
				const rapidjson::Value &nameval = (*val)[0];
				const rapidjson::Value &typeval = (*val)[1];
				if (nameval.IsString() && typeval.IsInt())
				{
					value = TexMan.GetTexture(nameval.GetString(), typeval.GetInt());
				}
				else
				{
					I_Error("object does not represent a texture for '%s'", key);
				}
			}
			else if (val->IsNull())
			{
				value.SetInvalid();
			}
			else if (val->IsInt() && val->GetInt() == 0)
			{
				value.SetNull();
			}
			else
			{
				I_Error("object does not represent a texture for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
// This never uses defval and instead uses 'null' as default
// because object pointers cannot be safely defaulted to anything else.
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, DObject *&value, DObject ** /*defval*/)
{
	if (arc.isWriting())
	{
		if (value != nullptr)
		{
			int ndx;
			int *pndx = arc.w->mObjectMap.CheckKey(value);
			if (pndx != nullptr) ndx = *pndx;
			else
			{
				ndx = arc.w->mDObjects.Push(value);
				arc.w->mObjectMap[value] = ndx;
			}
			Serialize(arc, key, ndx, nullptr);
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
		}
		else
		{
			value = nullptr;
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FName &value, FName *defval)
{
	if (arc.isWriting())
	{
		if (!arc.w->inObject() || defval == nullptr || value != *defval)
		{
			arc.WriteKey(key);
			arc.w->mWriter.String(value.GetChars());
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsString())
			{
				value = val->GetString();
			}
			else
			{
				I_Error("String expected for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FDynamicColormap *&cm, FDynamicColormap **def)
{
	if (arc.isWriting())
	{
		if (arc.w->inObject() && def != nullptr && cm->Color == (*def)->Color && cm->Fade == (*def)->Fade && cm->Desaturate == (*def)->Desaturate)
		{
			return arc;
		}

		arc.WriteKey(key);
		arc.w->mWriter.StartArray();
		arc.w->mWriter.Uint(cm->Color);
		arc.w->mWriter.Uint(cm->Fade);
		arc.w->mWriter.Uint(cm->Desaturate);
		arc.w->mWriter.EndArray();
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsObject())
			{
				const rapidjson::Value &colorval = (*val)[0];
				const rapidjson::Value &fadeval = (*val)[1];
				const rapidjson::Value &desatval = (*val)[2];
				if (colorval.IsUint() && fadeval.IsUint() && desatval.IsUint())
				{
					cm = GetSpecialLights(colorval.GetUint(), fadeval.GetUint(), desatval.GetUint());
				}
				else
				{
					I_Error("object does not represent a colormap for '%s'", key);
				}
			}
			else
			{
				I_Error("object does not represent a colormap for '%s'", key);
			}
		}
	}
	return arc;
}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FSoundID &sid, FSoundID *def)
{
	if (arc.isWriting())
	{
		if (arc.w->inObject() && def != nullptr && sid != *def)
		{
			arc.WriteKey(key);
			const char *sn = (const char*)sid;
			if (sn != nullptr) arc.w->mWriter.String(sn);
			else arc.w->mWriter.Null();
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsString())
			{
				sid = val->GetString();
			}
			else if (val->IsNull())
			{
				sid = 0;
			}
			else
			{
				I_Error("string type expected for '%s'", key);
			}
		}
	}
	return arc;

}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, PClassActor *&clst, PClassActor **def)
{
	if (arc.isWriting())
	{
		if (arc.w->inObject() && def != nullptr && clst != *def)
		{
			arc.WriteKey(key);
			arc.w->mWriter.String(clst->TypeName.GetChars());
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsString())
			{
				clst = PClass::FindActor(val->GetString());
			}
			else
			{
				I_Error("string type expected for '%s'", key);
			}
		}
	}
	return arc;

}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FState *&state, FState **def)
{
	if (arc.isWriting())
	{
		if (arc.w->inObject() && def != nullptr && state != *def)
		{
			arc.WriteKey(key);
			if (state == nullptr)
			{
				arc.w->mWriter.Null();
			}
			else
			{
				PClassActor *info = FState::StaticFindStateOwner(state);

				if (info != NULL)
				{
					arc.w->mWriter.StartArray();
					arc.w->mWriter.String(info->TypeName.GetChars());
					arc.w->mWriter.Uint((uint32_t)(state - info->OwnedStates));
					arc.w->mWriter.EndArray();
				}
				else
				{
					arc.w->mWriter.Null();
				}
			}
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsNull())
			{
				state = nullptr;
			}
			else if (val->IsArray())
			{
				const rapidjson::Value &cls = (*val)[0];
				const rapidjson::Value &ndx = (*val)[1];

				state = nullptr;
				if (cls.IsString() && ndx.IsInt())
				{
					PClassActor *clas = PClass::FindActor(cls.GetString());
					if (clas)
					{
						state = clas->OwnedStates + ndx.GetInt();
					}
				}
			}
			else
			{
				I_Error("array type expected for '%s'", key);
			}
		}
	}
	return arc;

}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FStrifeDialogueNode *&node, FStrifeDialogueNode **def)
{
	if (arc.isWriting())
	{
		if (arc.w->inObject() && def != nullptr && node != *def)
		{
			arc.WriteKey(key);
			if (node == nullptr)
			{
				arc.w->mWriter.Null();
			}
			else
			{
				arc.w->mWriter.Uint(node->ThisNodeNum);
			}
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsNull())
			{
				node = nullptr;
			}
			else if (val->IsUint())
			{
				if (val->GetUint() >= StrifeDialogues.Size())
				{
					node = NULL;
				}
				else
				{
					node = StrifeDialogues[val->GetUint()];
				}
			}
			else
			{
				I_Error("integer expected for '%s'", key);
			}
		}
	}
	return arc;

}

//==========================================================================
//
//
//
//==========================================================================

FSerializer &Serialize(FSerializer &arc, const char *key, FString *&pstr, FString **def)
{
	if (arc.isWriting())
	{
		if (arc.w->inObject() && def != nullptr && pstr != *def)
		{
			arc.WriteKey(key);
			if (pstr == nullptr)
			{
				arc.w->mWriter.Null();
			}
			else
			{
				arc.w->mWriter.String(pstr->GetChars());
			}
		}
	}
	else
	{
		auto val = arc.r->FindKey(key);
		if (val != nullptr)
		{
			if (val->IsNull())
			{
				pstr = nullptr;
			}
			else if (val->IsString())
			{
				pstr = AActor::mStringPropertyData.Alloc(val->GetString());
			}
			else
			{
				I_Error("string expected for '%s'", key);
			}
		}
	}
	return arc;

}