#include "../BasicCompiler_Common/common.h"
#include "Opcode.h"

int GetFunctionType(int FuncNum){
	switch(FuncNum){
		case FUNC_CUDBL:
			return DEF_DOUBLE;
		case FUNC_FIX:
		case FUNC_LEN:
			return DEF_LONG;
		case FUNC_ADDRESSOF:
		case FUNC_SIZEOF:
		case FUNC_VARPTR:
			return DEF_DWORD;
		case FUNC_GETDOUBLE:
			return DEF_DOUBLE;
		case FUNC_GETSINGLE:
			return DEF_SINGLE;
		case FUNC_GETQWORD:
			return DEF_QWORD;
		case FUNC_GETDWORD:
			return DEF_DWORD;
		case FUNC_GETWORD:
			return DEF_WORD;
		case FUNC_GETBYTE:
			return DEF_BYTE;
	}
	return 0;
}
int GetFunctionFromName(char *FuncName){
	if(lstrcmpi(FuncName,"CUDbl")==0)		return FUNC_CUDBL;
	if(lstrcmpi(FuncName,"Fix")==0)			return FUNC_FIX;
	if(lstrcmpi(FuncName,"Len")==0)			return FUNC_LEN;
	if(lstrcmpi(FuncName,"AddressOf")==0)	return FUNC_ADDRESSOF;
	if(lstrcmpi(FuncName,"SizeOf")==0)		return FUNC_SIZEOF;
	if(lstrcmpi(FuncName,"VarPtr")==0)		return FUNC_VARPTR;
	if(lstrcmpi(FuncName,"GetDouble")==0)	return FUNC_GETDOUBLE;
	if(lstrcmpi(FuncName,"GetSingle")==0)	return FUNC_GETSINGLE;
	if(lstrcmpi(FuncName,"GetQWord")==0)	return FUNC_GETQWORD;
	if(lstrcmpi(FuncName,"GetDWord")==0)	return FUNC_GETDWORD;
	if(lstrcmpi(FuncName,"GetWord")==0)		return FUNC_GETWORD;
	if(lstrcmpi(FuncName,"GetByte")==0)		return FUNC_GETBYTE;
	return 0;
}

void Opcode_Func_Fix(const char *lpszParms){
	Type resultType;
	if( !NumOpe( lpszParms, Type(), resultType ) ){
		return;
	}

	if( resultType.IsDouble() ){
		//fld qword ptr[esp]
		op_fld_ptr_esp(DEF_DOUBLE);

		//fnstcw word ptr[esp]
		OpBuffer[obp++]=(char)0xD9;
		OpBuffer[obp++]=(char)0x3C;
		OpBuffer[obp++]=(char)0x24;

		//mov ax,word ptr[esp]
		OpBuffer[obp++]=(char)0x66;
		OpBuffer[obp++]=(char)0x8B;
		OpBuffer[obp++]=(char)0x04;
		OpBuffer[obp++]=(char)0x24;

		//or ah,0Ch
		OpBuffer[obp++]=(char)0x80;
		OpBuffer[obp++]=(char)0xCC;
		OpBuffer[obp++]=(char)0x0C;

		//mov word ptr[esp-2],ax
		OpBuffer[obp++]=(char)0x66;
		OpBuffer[obp++]=(char)0x89;
		OpBuffer[obp++]=(char)0x44;
		OpBuffer[obp++]=(char)0x24;
		OpBuffer[obp++]=(char)0xFE;

		//fldcw word ptr[esp-2]
		OpBuffer[obp++]=(char)0xD9;
		OpBuffer[obp++]=(char)0x6C;
		OpBuffer[obp++]=(char)0x24;
		OpBuffer[obp++]=(char)0xFE;

		//fistp dword ptr[esp+4]
		OpBuffer[obp++]=(char)0xDB;
		OpBuffer[obp++]=(char)0x5C;
		OpBuffer[obp++]=(char)0x24;
		OpBuffer[obp++]=(char)0x04;

		//fldcw word ptr[esp]
		OpBuffer[obp++]=(char)0xD9;
		OpBuffer[obp++]=(char)0x2C;
		OpBuffer[obp++]=(char)0x24;

		//add esp,4
		op_add_esp(4);
	}
	else if( resultType.IsSingle() ){
		//fld dword ptr[esp]
		op_fld_ptr_esp(DEF_SINGLE);

		//sub esp,4
		op_sub_esp(4);

		//fnstcw word ptr[esp]
		OpBuffer[obp++]=(char)0xD9;
		OpBuffer[obp++]=(char)0x3C;
		OpBuffer[obp++]=(char)0x24;

		//mov ax,word ptr[esp]
		OpBuffer[obp++]=(char)0x66;
		OpBuffer[obp++]=(char)0x8B;
		OpBuffer[obp++]=(char)0x04;
		OpBuffer[obp++]=(char)0x24;

		//or ah,0Ch
		OpBuffer[obp++]=(char)0x80;
		OpBuffer[obp++]=(char)0xCC;
		OpBuffer[obp++]=(char)0x0C;

		//mov word ptr[esp-2],ax
		OpBuffer[obp++]=(char)0x66;
		OpBuffer[obp++]=(char)0x89;
		OpBuffer[obp++]=(char)0x44;
		OpBuffer[obp++]=(char)0x24;
		OpBuffer[obp++]=(char)0xFE;

		//fldcw word ptr[esp-2]
		OpBuffer[obp++]=(char)0xD9;
		OpBuffer[obp++]=(char)0x6C;
		OpBuffer[obp++]=(char)0x24;
		OpBuffer[obp++]=(char)0xFE;

		//fistp dword ptr[esp+4]
		OpBuffer[obp++]=(char)0xDB;
		OpBuffer[obp++]=(char)0x5C;
		OpBuffer[obp++]=(char)0x24;
		OpBuffer[obp++]=(char)0x04;

		//fldcw word ptr[esp]
		OpBuffer[obp++]=(char)0xD9;
		OpBuffer[obp++]=(char)0x2C;
		OpBuffer[obp++]=(char)0x24;

		//add esp,4
		op_add_esp(4);
	}
	else if( resultType.Is64() ){
		//pop eax
		op_pop(REG_EAX);

		//add esp,4
		op_add_esp(4);

		//push eax
		op_push(REG_EAX);
	}

	//pop eax
	op_pop(REG_EAX);
}

void Opcode_Func_CUDbl(const char *Parameter){
	Type resultType;
	if( !NumOpe(Parameter,Type(),resultType) ){
		return;
	}
	ChangeTypeToLong(resultType.GetBasicType());

	//pop eax
	op_pop(REG_EAX);

	//push 0
	OpBuffer[obp++]=(char)0x6A;
	OpBuffer[obp++]=(char)0x00;

	//push eax
	op_push(REG_EAX);

	//fild qword ptr[esp]
	OpBuffer[obp++]=(char)0xDF;
	OpBuffer[obp++]=(char)0x2C;
	OpBuffer[obp++]=(char)0x24;

	//add esp,8
	op_add_esp(8);
}
void Opcode_Func_Len(const char *Parameter){
	BOOL bArrayHead;

	const char *tempParm=Parameter;
	char temporary[VN_SIZE];
	char temp2[32];
	Type type;
	if( !GetVarType(Parameter,type,0) ){
		sprintf(temporary,"_System_DummyStr2=%s",Parameter);
		OpcodeCalc(temporary);

		lstrcpy(temp2,"_System_DummyStr2");
		tempParm=temp2;

		extern CClass *pobj_StringClass;
		type.SetType( DEF_OBJECT, pobj_StringClass );
	}

	if( type.IsStringObject() ){
		//Stringオブジェクトの場合
		sprintf(temporary,"%s.Length",tempParm);

		int reg=REG_RAX;
		NumOpe(temporary,Type(),Type());

		//pop eax
		op_pop(REG_EAX);

		return;
	}

	int SubScripts[MAX_ARRAYDIM];
	RELATIVE_VAR RelativeVar;
	if(!GetVarOffsetReadOnly(tempParm,&RelativeVar,type,SubScripts)) return;

	if(type.GetBasicType()&FLAG_PTR){
		type.SetBasicType( type.GetBasicType() & ( ~FLAG_PTR ) );

		bArrayHead=1;
	}
	else bArrayHead=0;

	int typeSize = type.GetSize();

	if(bArrayHead) typeSize*=JumpSubScripts(SubScripts);

	//mov eax,TypeSize
	OpBuffer[obp++]=(char)0xB8;
	*((long *)(OpBuffer+obp))=typeSize;
	obp+=sizeof(long);
}
void Opcode_Func_AddressOf( const char *name ){
	extern int cp;
	UserProc *pUserProc;

	extern LONG_PTR ProcPtr_BaseIndex;
	if(ProcPtr_BaseIndex!=-1){
		//左辺の型にのっとり、オーバーロードを解決

		std::vector<UserProc *> subs;
		GetOverloadSubHash( name, subs );
		if( subs.size() == 0 ){
			SetError(27,name,cp);
			return;
		}

		//オーバーロードを解決
		pUserProc=OverloadSolution(name,subs,House::procPointers[ProcPtr_BaseIndex]->Params(), Type() );

		if(!pUserProc){
			SetError(27,name,cp);
			return;
		}
	}
	else{
		pUserProc=GetSubHash(name);
		if(!pUserProc){
			SetError(27,name,cp);
			return;
		}
	}

	if( pUserProc->IsVirtual() ){
		///////////////////////////////
		// 仮想関数の場合
		// thisポインタをrcxにコピー
		///////////////////////////////

		CClass *pobj_c;

		char ObjectName[VN_SIZE];
		int RefType;
		SplitObjectName(name,ObjectName,&RefType);

		if(ObjectName[0]){
			if(lstrcmpi(ObjectName,"Super")==0) goto InClassMember;
			else{
				RELATIVE_VAR RelativeVar;
				Type type;
				if(!GetVarOffsetReadOnly(ObjectName,&RelativeVar,type)) return;
				SetVarPtrToEax(&RelativeVar);

				//mov ecx,eax
				op_mov_RR(REG_ECX,REG_EAX);

				//参照タイプが整合しているかをチェック
				if(type.GetBasicType()!=RefType) SetError(104,ObjectName,cp);

				if(type.IsObjectPtr()){
					//mov ecx,dword ptr[ecx]
					op_mov_RM(sizeof(long),REG_ECX,REG_ECX,0,MOD_BASE);
				}
			}
		}
		else{
InClassMember:
			//自身のオブジェクトのThisポインタをrcxにコピー
			SetThisPtrToReg(REG_RCX);

			pobj_c=pobj_CompilingClass;
		}


		//仮想関数（オブジェクトメソッド）
		//pObj->func_table->func1
		//                ->func2
		//                ->func3

		//mov edx,dword ptr[ecx]
		OpBuffer[obp++]=(char)0x8B;
		OpBuffer[obp++]=(char)0x11;

		int i2 = pobj_c->GetFuncNumInVtbl( pUserProc );

		//mov eax,dword ptr[edx+func_index]
		if(i2*PTR_SIZE<=0x7F){
			op_mov_RM(sizeof(long),REG_EAX,REG_EDX,i2*PTR_SIZE,MOD_BASE_DISP8);
		}
		else{
			op_mov_RM(sizeof(long),REG_EAX,REG_EDX,i2*PTR_SIZE,MOD_BASE_DISP32);
		}
	}
	else{
		//一般の関数

		//mov eax,ProcAddr
		OpBuffer[obp++]=(char)0xB8;
		pobj_SubAddrSchedule->add(pUserProc,0);
		obp+=sizeof(long);
	}

	pUserProc->Using();
}
void Opcode_Func_SizeOf(const char *Parameter){
	LONG_PTR lpIndex;
	int type = GetTypeFixed(Parameter,&lpIndex);

	int size;
	if( type == DEF_OBJECT ){
		CClass *pClass = (CClass *)lpIndex;
		size = pClass->GetSize();
	}
	else{
		size=GetTypeSize(type,lpIndex);
	}

	//mov eax,size
	op_mov_RV( REG_EAX, size );
}
void Opcode_Func_VarPtr( const char *Parameter, Type &resultType, bool isCallOn ){
	if( isCallOn == false ){
		// 戻り値の型を取得するだけ

		//変数のアドレスを取得
		if(!GetVarType( Parameter, resultType, true )) return;

		resultType.PtrLevelUp();

		return;
	}

	RELATIVE_VAR RelativeVar;

	//変数のアドレスを取得
	if(!GetVarOffsetReadOnly( Parameter, &RelativeVar, resultType )) return;

	int beforeType = resultType.GetBasicType();

	resultType.PtrLevelUp();

	SetVarPtrToEax(&RelativeVar);

	if( beforeType == DEF_OBJECT && lstrcmpi( Parameter, "This" ) != 0 ){
		//参照をオブジェクトポインタに変更

		//mov eax,dword ptr[eax]
		op_mov_RM( sizeof(long), REG_EAX, REG_EAX, 0, MOD_BASE );
	}
}
void Opcode_Func_GetPtrData(const char *Parameter,const int type){
	Type tempType;
	if( !NumOpe(Parameter,Type(),tempType) ){
		return;
	}
	if(!tempType.IsWhole()){
		SetError(11,Parameter,cp);
		return;
	}
	ChangeTypeToLong(tempType.GetBasicType());

	if(type==DEF_DOUBLE){
		//pop eax
		op_pop(REG_EAX);

		//fld qword ptr[eax]
		OpBuffer[obp++]=(char)0xDD;
		OpBuffer[obp++]=(char)0x00;
	}
	else if(type==DEF_SINGLE||type==DEF_DWORD){
		//pop eax
		op_pop(REG_EAX);

		//mov eax,dword ptr[eax]
		OpBuffer[obp++]=(char)0x8B;
		OpBuffer[obp++]=(char)0x00;
	}
	else if(type==DEF_QWORD){
		//pop ecx
		op_pop(REG_ECX);

		//mov eax,dword ptr[ecx]
		op_mov_RM(sizeof(long),REG_EAX,REG_ECX,0,MOD_BASE);

		//mov edx,dword ptr[ecx+sizeof(long)]
		op_mov_RM(sizeof(long),REG_EDX,REG_ECX,sizeof(long),MOD_BASE_DISP8);
	}
	else if(type==DEF_WORD){
		//pop ebx
		op_pop(REG_EBX);

		//xor eax,eax
		OpBuffer[obp++]=(char)0x33;
		OpBuffer[obp++]=(char)0xC0;

		//mov ax,word ptr[ebx]
		OpBuffer[obp++]=(char)0x66;
		OpBuffer[obp++]=(char)0x8B;
		OpBuffer[obp++]=(char)0x03;
	}
	else if(type==DEF_BYTE){
		//pop ebx
		op_pop(REG_EBX);

		//xor eax,eax
		OpBuffer[obp++]=(char)0x33;
		OpBuffer[obp++]=(char)0xC0;

		//mov al,byte ptr[ebx]
		OpBuffer[obp++]=(char)0x8A;
		OpBuffer[obp++]=(char)0x03;
	}
}

bool Opcode_CallFunc( const char *Parameter, const int FuncNum, Type &resultType, bool isCallOn ){
	switch(FuncNum){
		case FUNC_FIX:
			if( isCallOn ) Opcode_Func_Fix(Parameter);
			resultType.SetBasicType( DEF_LONG );
			break;
		case FUNC_CUDBL:
			if( isCallOn ) Opcode_Func_CUDbl(Parameter);
			resultType.SetBasicType( DEF_DOUBLE );
			break;
		case FUNC_LEN:
			if( isCallOn ) Opcode_Func_Len(Parameter);
			resultType.SetBasicType( DEF_LONG );
			break;
		case FUNC_ADDRESSOF:
			if( isCallOn ) Opcode_Func_AddressOf(Parameter);
			resultType.SetBasicType( DEF_PTR_VOID );
			break;
		case FUNC_SIZEOF:
			if( isCallOn ) Opcode_Func_SizeOf(Parameter);
			resultType.SetBasicType( DEF_LONG );
			break;
		case FUNC_VARPTR:
			Opcode_Func_VarPtr( Parameter, resultType, isCallOn );
			break;

		case FUNC_GETDOUBLE:
			if( isCallOn ) Opcode_Func_GetPtrData(Parameter,DEF_DOUBLE);
			resultType.SetBasicType( DEF_DOUBLE );
			break;
		case FUNC_GETSINGLE:
			if( isCallOn ) Opcode_Func_GetPtrData(Parameter,DEF_SINGLE);
			resultType.SetBasicType( DEF_SINGLE );
			break;
		case FUNC_GETQWORD:
			if( isCallOn ) Opcode_Func_GetPtrData(Parameter,DEF_QWORD);
			resultType.SetBasicType( DEF_QWORD );
			break;
		case FUNC_GETDWORD:
			if( isCallOn ) Opcode_Func_GetPtrData(Parameter,DEF_DWORD);
			resultType.SetBasicType( DEF_DWORD );
			break;
		case FUNC_GETWORD:
			if( isCallOn ) Opcode_Func_GetPtrData(Parameter,DEF_WORD);
			resultType.SetBasicType( DEF_WORD );
			break;
		case FUNC_GETBYTE:
			if( isCallOn ) Opcode_Func_GetPtrData(Parameter,DEF_BYTE);
			resultType.SetBasicType( DEF_BYTE );
			break;
		default:
			return false;
	}
	return true;
}