libreoffice/basic/source/runtime/step1.cxx

/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: step1.cxx,v $
 *
 *  $Revision: 1.14 $
 *
 *  last change: $Author: obo $ $Date: 2006-10-12 14:31:12 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basic.hxx"

#include <stdlib.h>
#include <rtl/math.hxx>
#include "runtime.hxx"
#include "sbintern.hxx"
#include "iosys.hxx"
#include "image.hxx"
#include "sbunoobj.hxx"

// Laden einer numerischen Konstanten (+ID)

void SbiRuntime::StepLOADNC( USHORT nOp1 )
{
    SbxVariable* p = new SbxVariable( SbxDOUBLE );

    // #57844 Lokalisierte Funktion benutzen
    String aStr = pImg->GetString( nOp1 );
    // Auch , zulassen !!!
    USHORT iComma = aStr.Search( ',' );
    if( iComma != STRING_NOTFOUND )
    {
        String aStr1 = aStr.Copy( 0, iComma );
        String aStr2 = aStr.Copy( iComma + 1 );
        aStr = aStr1;
        aStr += '.';
        aStr += aStr2;
    }
    double n = ::rtl::math::stringToDouble( aStr, '.', ',', NULL, NULL );

    p->PutDouble( n );
    PushVar( p );
}

// Laden einer Stringkonstanten (+ID)

void SbiRuntime::StepLOADSC( USHORT nOp1 )
{
    SbxVariable* p = new SbxVariable;
    p->PutString( pImg->GetString( nOp1 ) );
    PushVar( p );
}

// Immediate Load (+Wert)

void SbiRuntime::StepLOADI( USHORT nOp1 )
{
    SbxVariable* p = new SbxVariable;
    p->PutInteger( nOp1 );
    PushVar( p );
}

// Speichern eines named Arguments in Argv (+Arg-Nr ab 1!)

void SbiRuntime::StepARGN( USHORT nOp1 )
{
    if( !refArgv )
        StarBASIC::FatalError( SbERR_INTERNAL_ERROR );
    else
    {
        String aAlias( pImg->GetString( nOp1 ) );
        SbxVariableRef pVal = PopVar();
        refArgv->Put( pVal, nArgc );
        refArgv->PutAlias( aAlias, nArgc++ );
    }
}

// Konvertierung des Typs eines Arguments in Argv fuer DECLARE-Fkt. (+Typ)

void SbiRuntime::StepARGTYP( USHORT nOp1 )
{
    if( !refArgv )
        StarBASIC::FatalError( SbERR_INTERNAL_ERROR );
    else
    {
        BOOL bByVal = (nOp1 & 0x8000) != 0;         // Ist BYVAL verlangt?
        SbxDataType t = (SbxDataType) (nOp1 & 0x7FFF);
        SbxVariable* pVar = refArgv->Get( refArgv->Count() - 1 );   // letztes Arg

        // BYVAL pr<70>fen
        if( pVar->GetRefCount() > 2 )       // 2 ist normal f<>r BYVAL
        {
            // Parameter ist eine Referenz
            if( bByVal )
            {
                // Call by Value ist verlangt -> Kopie anlegen
                pVar = new SbxVariable( *pVar );
                pVar->SetFlag( SBX_READWRITE );
                refExprStk->Put( pVar, refArgv->Count() - 1 );
            }
            else
                pVar->SetFlag( SBX_REFERENCE );     // Ref-Flag f<>r DllMgr
        }
        else
        {
            // Parameter ist KEINE Referenz
            if( bByVal )
                pVar->ResetFlag( SBX_REFERENCE );   // Keine Referenz -> OK
            else
                Error( SbERR_BAD_PARAMETERS );      // Referenz verlangt
        }

        if( pVar->GetType() != t )
        {
            // Variant, damit richtige Konvertierung
            // Ausserdem Fehler, wenn SbxBYREF
            pVar->Convert( SbxVARIANT );
            pVar->Convert( t );
        }
    }
}

// String auf feste Laenge bringen (+Laenge)

void SbiRuntime::StepPAD( USHORT nOp1 )
{
    SbxVariable* p = GetTOS();
    String& s = (String&)(const String&) *p;
    if( s.Len() > nOp1 )
        s.Erase( nOp1 );
    else
        s.Expand( nOp1, ' ' );
}

// Sprung (+Target)

void SbiRuntime::StepJUMP( USHORT nOp1 )
{
#ifndef PRODUCT
    if( nOp1 >= pImg->GetCodeSize() )
        StarBASIC::FatalError( SbERR_INTERNAL_ERROR );
#endif
    pCode = (const BYTE*) pImg->GetCode() + nOp1;
}

// TOS auswerten, bedingter Sprung (+Target)

void SbiRuntime::StepJUMPT( USHORT nOp1 )
{
    SbxVariableRef p = PopVar();
    if( p->GetBool() )
        StepJUMP( nOp1 );
}

// TOS auswerten, bedingter Sprung (+Target)

void SbiRuntime::StepJUMPF( USHORT nOp1 )
{
    SbxVariableRef p = PopVar();
    if( !p->GetBool() )
        StepJUMP( nOp1 );
}

// TOS auswerten, Sprung in JUMP-Tabelle (+MaxVal)
// Sieht so aus:
// ONJUMP 2
// JUMP target1
// JUMP target2
// ...
//Falls im Operanden 0x8000 gesetzt ist, Returnadresse pushen (ON..GOSUB)

void SbiRuntime::StepONJUMP( USHORT nOp1 )
{
    SbxVariableRef p = PopVar();
    INT16 n = p->GetInteger();
    if( nOp1 & 0x8000 )
    {
        nOp1 &= 0x7FFF;
        PushGosub( pCode + 3 * nOp1 );
    }
    if( n < 1 || n > (short) nOp1 )
        n = nOp1 + 1;
    nOp1 = (USHORT) ( (const char*) pCode - pImg->GetCode() ) + 3 * --n;
    StepJUMP( nOp1 );
}

// UP-Aufruf (+Target)

void SbiRuntime::StepGOSUB( USHORT nOp1 )
{
    PushGosub( pCode );
    if( nOp1 >= pImg->GetCodeSize() )
        StarBASIC::FatalError( SbERR_INTERNAL_ERROR );
    pCode = (const BYTE*) pImg->GetCode() + nOp1;
}

// UP-Return (+0 oder Target)

void SbiRuntime::StepRETURN( USHORT nOp1 )
{
    PopGosub();
    if( nOp1 )
        StepJUMP( nOp1 );
}

// FOR-Variable testen (+Endlabel)

void unoToSbxValue( SbxVariable* pVar, const Any& aValue );

void SbiRuntime::StepTESTFOR( USHORT nOp1 )
{
    if( !pForStk )
    {
        StarBASIC::FatalError( SbERR_INTERNAL_ERROR );
        return;
    }

    bool bEndLoop = false;
    switch( pForStk->eForType )
    {
        case FOR_TO:
        {
            SbxOperator eOp = ( pForStk->refInc->GetDouble() < 0 ) ? SbxLT : SbxGT;
            if( pForStk->refVar->Compare( eOp, *pForStk->refEnd ) )
                bEndLoop = true;
            break;
        }
        case FOR_EACH_ARRAY:
        {
            SbiForStack* p = pForStk;
            if( p->pArrayCurIndices == NULL )
            {
                bEndLoop = true;
            }
            else
            {
                SbxDimArray* pArray = (SbxDimArray*)(SbxVariable*)p->refEnd;
                short nDims = pArray->GetDims();

                // Empty array?
                if( nDims == 1 && p->pArrayLowerBounds[0] > p->pArrayUpperBounds[0] )
                {
                    bEndLoop = true;
                    break;
                }
                SbxVariable* pVal = pArray->Get32( p->pArrayCurIndices );
                *(p->refVar) = *pVal;

                bool bFoundNext = false;
                for( short i = 0 ; i < nDims ; i++ )
                {
                    if( p->pArrayCurIndices[i] < p->pArrayUpperBounds[i] )
                    {
                        bFoundNext = true;
                        p->pArrayCurIndices[i]++;
                        for( short j = i - 1 ; j >= 0 ; j-- )
                            p->pArrayCurIndices[j] = p->pArrayLowerBounds[j];
                        break;
                    }
                }
                if( !bFoundNext )
                {
                    delete[] p->pArrayCurIndices;
                    p->pArrayCurIndices = NULL;
                }
            }
            break;
        }
        case FOR_EACH_COLLECTION:
        {
            BasicCollection* pCollection = (BasicCollection*)(SbxVariable*)pForStk->refEnd;
            SbxArrayRef xItemArray = pCollection->xItemArray;
            INT32 nCount = xItemArray->Count32();
            if( pForStk->nCurCollectionIndex < nCount )
            {
                SbxVariable* pRes = xItemArray->Get32( pForStk->nCurCollectionIndex );
                pForStk->nCurCollectionIndex++;
                (*pForStk->refVar) = *pRes;
            }
            else
            {
                bEndLoop = true;
            }
            break;
        }
        case FOR_EACH_XENUMERATION:
        {
            SbiForStack* p = pForStk;
            if( p->xEnumeration->hasMoreElements() )
            {
                Any aElem = p->xEnumeration->nextElement();
                SbxVariableRef xVar = new SbxVariable( SbxVARIANT );
                unoToSbxValue( (SbxVariable*)xVar, aElem );
                (*pForStk->refVar) = *xVar;
            }
            else
            {
                bEndLoop = true;
            }
            break;
        }
    }
    if( bEndLoop )
    {
        PopFor();
        StepJUMP( nOp1 );
    }
}

// Tos+1 <= Tos+2 <= Tos, 2xremove (+Target)

void SbiRuntime::StepCASETO( USHORT nOp1 )
{
    if( !refCaseStk || !refCaseStk->Count() )
        StarBASIC::FatalError( SbERR_INTERNAL_ERROR );
    else
    {
        SbxVariableRef xTo   = PopVar();
        SbxVariableRef xFrom = PopVar();
        SbxVariableRef xCase = refCaseStk->Get( refCaseStk->Count() - 1 );
        if( *xCase >= *xFrom && *xCase <= *xTo )
            StepJUMP( nOp1 );
    }
}

// Fehler-Handler

void SbiRuntime::StepERRHDL( USHORT nOp1 )
{
    const BYTE* p = pCode;
    StepJUMP( nOp1 );
    pError = pCode;
    pCode = p;
    pInst->aErrorMsg = String();
    pInst->nErr = 0;
    pInst->nErl = 0;
    nError = 0;
}

// Resume nach Fehlern (+0=statement, 1=next or Label)

void SbiRuntime::StepRESUME( USHORT nOp1 )
{
    // AB #32714 Resume ohne Error? -> Fehler
    if( !bInError )
    {
        Error( SbERR_BAD_RESUME );
        return;
    }
    if( nOp1 )
    {
        // Code-Zeiger auf naechstes Statement setzen
        USHORT n1, n2;
        pCode = pMod->FindNextStmnt( pErrCode, n1, n2, TRUE, pImg );
    }
    else
        pCode = pErrStmnt;

    if( nOp1 > 1 )
        StepJUMP( nOp1 );
    pInst->aErrorMsg = String();
    pInst->nErr = 0;
    pInst->nErl = 0;
    nError = 0;
    bInError = FALSE;

    // Error-Stack loeschen
    SbErrorStack*& rErrStack = GetSbData()->pErrStack;
    delete rErrStack;
    rErrStack = NULL;
}

// Kanal schliessen (+Kanal, 0=Alle)
void SbiRuntime::StepCLOSE( USHORT nOp1 )
{
    SbError err;
    if( !nOp1 )
        pIosys->Shutdown();
    else
    {
        err = pIosys->GetError();
        if( !err )
        {
            pIosys->Close();
        }
    }
    err = pIosys->GetError();
    Error( err );
}

// Zeichen ausgeben (+char)

void SbiRuntime::StepPRCHAR( USHORT nOp1 )
{
    ByteString s( (char) nOp1 );
    pIosys->Write( s );
    Error( pIosys->GetError() );
}

// Check, ob TOS eine bestimmte Objektklasse ist (+StringID)

bool SbiRuntime::implIsClass( SbxObject* pObj, const String& aClass )
{
    bool bRet = true;

    if( aClass.Len() != 0 )
    {
        bRet = pObj->IsClass( aClass );
        if( !bRet )
            bRet = aClass.EqualsIgnoreCaseAscii( String( RTL_CONSTASCII_USTRINGPARAM("object") ) );
        if( !bRet )
        {
            String aObjClass = pObj->GetClassName();
            SbModule* pClassMod = pCLASSFAC->FindClass( aObjClass );
            SbClassData* pClassData;
            if( pClassMod && (pClassData=pClassMod->pClassData) != NULL )
            {
                SbxVariable* pClassVar =
                    pClassData->mxIfaces->Find( aClass, SbxCLASS_DONTCARE );
                bRet = (pClassVar != NULL);
            }
        }
    }
    return bRet;
}

bool SbiRuntime::checkClass_Impl( const SbxVariableRef& refVal,
    const String& aClass, bool bRaiseErrors )
{
    bool bOk = true;

    SbxDataType t = refVal->GetType();
    if( t == SbxOBJECT )
    {
        SbxObject* pObj;
        SbxVariable* pVal = (SbxVariable*)refVal;
        if( pVal->IsA( TYPE(SbxObject) ) )
            pObj = (SbxObject*) pVal;
        else
        {
            pObj = (SbxObject*) refVal->GetObject();
            if( pObj && !pObj->IsA( TYPE(SbxObject) ) )
                pObj = NULL;
        }
        if( pObj )
        {
            if( !implIsClass( pObj, aClass ) )
            {
                if( bRaiseErrors )
                    Error( SbERR_INVALID_USAGE_OBJECT );
                bOk = false;
            }
            else
            {
                SbClassModuleObject* pClassModuleObject = PTR_CAST(SbClassModuleObject,pObj);
                if( pClassModuleObject != NULL )
                    pClassModuleObject->triggerInitializeEvent();
            }
        }
    }
    else
    {
        if( bRaiseErrors )
            Error( SbERR_NEEDS_OBJECT );
        bOk = false;
    }
    return bOk;
}

void SbiRuntime::StepSETCLASS( USHORT nOp1 )
{
    SbxVariableRef refVal = PopVar();
    SbxVariableRef refVar = PopVar();
    String aClass( pImg->GetString( nOp1 ) );

    bool bOk = checkClass_Impl( refVal, aClass, true );
    if( bOk )
        StepSET_Impl( refVal, refVar );
}

void SbiRuntime::StepTESTCLASS( USHORT nOp1 )
{
    SbxVariableRef xObjVal = PopVar();
    String aClass( pImg->GetString( nOp1 ) );
    bool bOk = checkClass_Impl( xObjVal, aClass, false );

    SbxVariable* pRet = new SbxVariable;
    pRet->PutBool( bOk );
    PushVar( pRet );
}

// Library fuer anschliessenden Declare-Call definieren

void SbiRuntime::StepLIB( USHORT nOp1 )
{
    aLibName = pImg->GetString( nOp1 );
}

// TOS wird um BASE erhoeht, BASE davor gepusht (+BASE)
// Dieser Opcode wird vor DIM/REDIM-Anweisungen gepusht,
// wenn nur ein Index angegeben wurde.

void SbiRuntime::StepBASED( USHORT nOp1 )
{
    SbxVariable* p1 = new SbxVariable;
    SbxVariableRef x2 = PopVar();

    // #109275 Check compatiblity mode
    bool bCompatible = ((nOp1 & 0x8000) != 0);
    USHORT uBase = (nOp1 & 1);      // Can only be 0 or 1
    p1->PutInteger( uBase );
    if( !bCompatible )
        x2->Compute( SbxPLUS, *p1 );
    PushVar( x2 );  // erst die Expr
    PushVar( p1 );  // dann die Base
}