source: dev/BasicCompiler32/Compile_Func.cpp@ 138

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

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,"ObjPtr")==0)      return FUNC_OBJPTR;
    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;

        type.SetType( DEF_OBJECT, pobj_DBClass->GetStringClassPtr() );
    }

    if( type.IsStringClass() ){
        //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,Smoothie::Meta::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
        ///////////////////////////////

        const 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 string &typeName ){
    Type tempType;
    if( !Type::StringToType( typeName, tempType ) ){
        SetError(3,typeName,cp);
        return;
    }

    int typeSize = ( tempType.IsObject() ) ?
        tempType.GetClass().GetSize() : tempType.GetSize();

    //mov eax,size
    op_mov_RV( REG_EAX, typeSize );
}
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);

    // TODO: 取り除く（この動きはObjPtrに託す）
    /*
    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 );

        SetError(-120,NULL,cp);
    }*/
}
void Opcode_Func_ObjPtr( 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( lstrcmpi( Parameter, "This" )==0 ){
        // Thisの場合は特別にオブジェクトポインタが返ってくるので、何もせずに抜ける
    }
    else if( beforeType == DEF_OBJECT ){
        //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 );
    }
    else{
        SetError(134,NULL,cp );
    }
}
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_OBJPTR:
            Opcode_Func_ObjPtr( 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;
}