/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

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

#include <malloc.h>

#include <com/sun/star/uno/genfunc.hxx>
#include <uno/data.h>

#include "bridges/cpp_uno/shared/bridge.hxx"
#include "bridges/cpp_uno/shared/types.hxx"
#include "bridges/cpp_uno/shared/unointerfaceproxy.hxx"
#include "bridges/cpp_uno/shared/vtables.hxx"

#include "share.hxx"

#include <stdio.h>
#include <string.h>


using namespace ::rtl;
using namespace ::com::sun::star::uno;

namespace
{
static sal_Int32
invoke_count_words(char * pPT)
{
     sal_Int32 overflow = 0, gpr = 0, fpr = 0;
     int c;                        // character of parameter type being decoded

     while (*pPT != 'X') {
       c = *pPT;
       switch (c) {
       case 'D':                   /* type is double */
            if (fpr < 2) fpr++; else overflow+=2;
            break;

       case 'F':                   /* type is float */
            if (fpr < 2) fpr++; else overflow++;
            break;

       case 'H':                /* type is long long */
            if (gpr < 4) gpr+=2; else gpr=5, overflow+=2;
            break;

       case 'S':
       case 'T':
       case 'B':
       case 'C':
            if (gpr < 5) gpr++; else overflow++;
            break;

       default:
            if (gpr < 5) gpr++; else overflow++;
            break;
       }
       pPT++;
     }
     /* Round up number of overflow words to ensure stack
       stays aligned to 8 bytes.  */
     return (overflow + 1) & ~1;
}

static void
//invoke_copy_to_stack(sal_Int32 paramCount, sal_Int32 * pStackLongs, char * pPT, sal_Int32* d_ov, sal_Int32 overflow)
invoke_copy_to_stack(sal_Int32 * pStackLongs, char * pPT, sal_Int32* d_ov, sal_Int32 overflow)
{
    sal_Int32 *d_gpr = d_ov + overflow; 
    sal_Int64 *d_fpr = (sal_Int64 *)(d_gpr + 5);
    sal_Int32 gpr = 0, fpr = 0;
    char c;

     while (*pPT != 'X') {
       c = *pPT;
       switch (c) {
       case 'D':                   /* type is double */
            if (fpr < 2)
                *((double*)  d_fpr) = *((double *)pStackLongs), d_fpr++, fpr++;
            else
                *((double*)  d_ov ) = *((double *)pStackLongs), d_ov+=2;

            pStackLongs += 2;
            break;

       case 'F':                   /* type is float */
            if (fpr < 2) {
                *((sal_Int64*) d_fpr) = 0;
                *((float*)   d_fpr) = *((float *)pStackLongs), d_fpr++, fpr++;
              }
            else {
                *((sal_Int64*) d_ov) = 0;
                *((float*)   d_ov ) = *((float *)pStackLongs), d_ov++;
              }

            pStackLongs += 1;
            break;

       case 'H':                /* type is long long */
            if (gpr < 4) {
                *((sal_Int64*) d_gpr) = *((sal_Int64*) pStackLongs), d_gpr+=2, gpr+=2;
              }
            else {
                *((sal_Int64*) d_ov ) = *((sal_Int64*) pStackLongs), d_ov+=2, gpr=5;
              }
            pStackLongs += 2;
            break;

       case 'S':
            if (gpr < 5)
                *((sal_uInt32*)d_gpr) = *((unsigned short*)pStackLongs), d_gpr++, gpr++;
            else
                *((sal_uInt32*)d_ov ) = *((unsigned short*)pStackLongs), d_ov++;
            pStackLongs += 1;
            break;

       case 'T':
            if (gpr < 5)
                *((sal_Int32*)d_gpr) = *((signed short*)pStackLongs), d_gpr++, gpr++;
            else
                *((sal_Int32*)d_ov ) = *((signed short*)pStackLongs), d_ov++;
            pStackLongs += 1;
            break;

       case 'B':
            if (gpr < 5)
                *((sal_uInt32*)d_gpr) = *((unsigned char*)pStackLongs), d_gpr++, gpr++;
            else
                *((sal_uInt32*)d_ov ) = *((unsigned char*)pStackLongs), d_ov++;
            pStackLongs += 1;
            break;

       case 'C':
            if (gpr < 5)
                *((sal_Int32*)d_gpr) = *((signed char*)pStackLongs), d_gpr++, gpr++;
            else
                *((sal_Int32*)d_ov ) = *((signed char*)pStackLongs), d_ov++;
            pStackLongs += 1;
            break;

       default:
            if (gpr < 5)
                *((sal_Int32*)d_gpr) = *pStackLongs, d_gpr++, gpr++;
            else
                *((sal_Int32*)d_ov ) = *pStackLongs, d_ov++;
            pStackLongs += 1;
            break;
       }
       pPT++;
     }
}

//==================================================================================================
static void callVirtualMethod(
    void * pThis,
    sal_Int32 nVtableIndex,
    void * pRegisterReturn,
    typelib_TypeClass eReturnType,
    char * pPT,
    sal_Int32 * pStackLongs,
    sal_Int32 nStackLongs)
{

  // parameter list is mixed list of * and values
  // reference parameters are pointers

  // the basic idea here is to use gpr[5] as a storage area for
  // the future values of registers r2 to r6 needed for the call, 
  // and similarly fpr[2] as a storage area for the future values
  // of floating point registers f0 to f2

     sal_Int32 *vtable = *(sal_Int32 **)pThis;
//    sal_Int32 method = vtable[nVtableIndex + 2];
     sal_Int32 method = vtable[nVtableIndex];
     sal_Int32 overflow = invoke_count_words (pPT);
     sal_Int32 result;
     volatile double dret;                  // temporary function return values
     volatile float fret;
     volatile int iret, iret2;

     void * dummy = alloca(32); // dummy alloca to force r11 usage for exception handling

    __asm__ __volatile__
     (
        "lr    7,15\n\t"
        "ahi   7,-48\n\t"

        "lr    3,%2\n\t"
        "sll   3,2\n\t"
        "lcr   3,3\n\t"
        "l     2,0(15)\n\t"
        "la    15,0(3,7)\n\t"
        "st    2,0(15)\n\t"

        "lr    2,%0\n\t"
        "lr    3,%1\n\t"
        "la    4,96(15)\n\t"
        "lr    5,%2\n\t"
        "basr  14,%3\n\t"

        "ld    0,116(7)\n\t"
        "ld    2,124(7)\n\t"
        "lm    2,6,96(7)\n\t"
        : 
        : "r" (pStackLongs),
          "r" (pPT), 
          "r" (overflow),
          "a" (invoke_copy_to_stack),
          "a" (method),
          "X" (dummy)
        : "2", "3", "4", "5", "6", "7", "memory"
    );
//	"basr  14,%8\n\t"

    (*(void (*)())method)();

    __asm__ __volatile__
     (
        "la    15,48(7)\n\t" 
 
        "lr    %2,2\n\t"
        "lr    %3,3\n\t"
        "ler   %0,0\n\t"
        "ldr   %1,0\n\t"

        : "=f" (fret), "=f" (dret), "=r" (iret), "=r" (iret2)
    );

    switch( eReturnType )
	{
		case typelib_TypeClass_HYPER:
		case typelib_TypeClass_UNSIGNED_HYPER:
//		        ((long*)pRegisterReturn)[0] = iret;
			((long*)pRegisterReturn)[1] = iret2;
		case typelib_TypeClass_LONG:
		case typelib_TypeClass_UNSIGNED_LONG:
		case typelib_TypeClass_ENUM:
			((long*)pRegisterReturn)[0] = iret;
			break;
		case typelib_TypeClass_CHAR:
		case typelib_TypeClass_SHORT:
		case typelib_TypeClass_UNSIGNED_SHORT:
		        *(unsigned short*)pRegisterReturn = (unsigned short)iret;
			break;
		case typelib_TypeClass_BOOLEAN:
		case typelib_TypeClass_BYTE:
		        *(unsigned char*)pRegisterReturn = (unsigned char)iret;
			break;
		case typelib_TypeClass_FLOAT:
		        *(float*)pRegisterReturn = fret;
			break;
		case typelib_TypeClass_DOUBLE:
			*(double*)pRegisterReturn = dret;
			break;
	}
}


//============================================================================ 
static void cpp_call(
        bridges::cpp_uno::shared::UnoInterfaceProxy * pThis,
        bridges::cpp_uno::shared::VtableSlot  aVtableSlot,
        typelib_TypeDescriptionReference * pReturnTypeRef,
	sal_Int32 nParams, typelib_MethodParameter * pParams,
	void * pUnoReturn, void * pUnoArgs[], uno_Any ** ppUnoExc )
{
  	// max space for: [complex ret ptr], values|ptr ...
  	char * pCppStack		=
  		(char *)alloca( sizeof(sal_Int32) + ((nParams+2) * sizeof(sal_Int64)) );
  	char * pCppStackStart	= pCppStack;
	
        // need to know parameter types for callVirtualMethod so generate a signature string
        char * pParamType = (char *) alloca(nParams+2);
        char * pPT = pParamType;

	// return
	typelib_TypeDescription * pReturnTypeDescr = 0;
	TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
	OSL_ENSURE( pReturnTypeDescr, "### expected return type description!" );
	
	void * pCppReturn = 0; // if != 0 && != pUnoReturn, needs reconversion
	
	if (pReturnTypeDescr)
	{
		if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
		{
			pCppReturn = pUnoReturn; // direct way for simple types
		}
		else
		{
			// complex return via ptr
			pCppReturn = *(void **)pCppStack = (bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr )
												? alloca( pReturnTypeDescr->nSize )
												: pUnoReturn); // direct way
                        *pPT++ = 'I'; //signify that a complex return type on stack
			pCppStack += sizeof(void *);
		}
	}
        // push "this" pointer
        void * pAdjustedThisPtr = reinterpret_cast< void ** >( pThis->getCppI() ) + aVtableSlot.offset;
	*(void**)pCppStack = pAdjustedThisPtr;
	pCppStack += sizeof( void* );
        *pPT++ = 'I';

	// stack space
	OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
	// args
	void ** pCppArgs  = (void **)alloca( 3 * sizeof(void *) * nParams );
	// indizes of values this have to be converted (interface conversion cpp<=>uno)
	sal_Int32 * pTempIndizes = (sal_Int32 *)(pCppArgs + nParams);
	// type descriptions for reconversions
	typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pCppArgs + (2 * nParams));
	
	sal_Int32 nTempIndizes   = 0;
	
	for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
	{
		const typelib_MethodParameter & rParam = pParams[nPos];
		typelib_TypeDescription * pParamTypeDescr = 0;
		TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
		
		if (!rParam.bOut && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
		{
			uno_copyAndConvertData( pCppArgs[nPos] = pCppStack, pUnoArgs[nPos], pParamTypeDescr,
									pThis->getBridge()->getUno2Cpp() );

			switch (pParamTypeDescr->eTypeClass)
			{

                          // we need to know type of each param so that we know whether to use
                          // gpr or fpr to pass in parameters:
                          // Key: I - int, long, pointer, etc means pass in gpr
                          //      B - byte value passed in gpr
                          //      S - short value passed in gpr
                          //      F - float value pass in fpr
                          //      D - double value pass in fpr
                          //      H - long long int pass in proper pairs of gpr (3,4) (5,6), etc
                          //      X - indicates end of parameter description string

		          case typelib_TypeClass_LONG:
		          case typelib_TypeClass_UNSIGNED_LONG:
		          case typelib_TypeClass_ENUM:
			    *pPT++ = 'I';
			    break;
 		          case typelib_TypeClass_SHORT:
                            *pPT++ = 'T';
                            break;
		          case typelib_TypeClass_CHAR:
		          case typelib_TypeClass_UNSIGNED_SHORT:
                            *pPT++ = 'S';
                            break;
		          case typelib_TypeClass_BOOLEAN:
                            *pPT++ = 'B';
                            break;
		          case typelib_TypeClass_BYTE:
                            *pPT++ = 'C';
                            break;
		          case typelib_TypeClass_FLOAT:
                            *pPT++ = 'F';
			    break;
		        case typelib_TypeClass_DOUBLE:
			    *pPT++ = 'D';
			    pCppStack += sizeof(sal_Int32); // extra long
			    break;
			case typelib_TypeClass_HYPER:
			case typelib_TypeClass_UNSIGNED_HYPER:
			    *pPT++ = 'H';
			    pCppStack += sizeof(sal_Int32); // extra long
			}

			// no longer needed
			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
		}
		else // ptr to complex value | ref
		{
			if (! rParam.bIn) // is pure out
			{
				// cpp out is constructed mem, uno out is not!
				uno_constructData(
					*(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
					pParamTypeDescr );
				pTempIndizes[nTempIndizes] = nPos; // default constructed for cpp call
				// will be released at reconversion
				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
			}
			// is in/inout
			else if (bridges::cpp_uno::shared::relatesToInterfaceType( pParamTypeDescr ))
			{
				uno_copyAndConvertData(
					*(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
					pUnoArgs[nPos], pParamTypeDescr, pThis->getBridge()->getUno2Cpp() );
				
				pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
				// will be released at reconversion
				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
			}
			else // direct way
			{
				*(void **)pCppStack = pCppArgs[nPos] = pUnoArgs[nPos];
				// no longer needed
				TYPELIB_DANGER_RELEASE( pParamTypeDescr );
			}
                        // KBH: FIXME: is this the right way to pass these
                        *pPT++='I';
		}
		pCppStack += sizeof(sal_Int32); // standard parameter length
	}
  
        // terminate the signature string
        *pPT++='X';
        *pPT=0;

	try
	{
		OSL_ENSURE( !( (pCppStack - pCppStackStart ) & 3), "UNALIGNED STACK !!! (Please DO panic)" );
		callVirtualMethod(
			pAdjustedThisPtr, aVtableSlot.index,
			pCppReturn, pReturnTypeDescr->eTypeClass, pParamType,
			(sal_Int32 *)pCppStackStart, (pCppStack - pCppStackStart) / sizeof(sal_Int32) );
		// NO exception occured...
		*ppUnoExc = 0;
		
		// reconvert temporary params
		for ( ; nTempIndizes--; )
		{
			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
			typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
			
			if (pParams[nIndex].bIn)
			{
				if (pParams[nIndex].bOut) // inout
				{
					uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 ); // destroy uno value
					uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
											pThis->getBridge()->getCpp2Uno() );
				}
			}
			else // pure out
			{
				uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
										pThis->getBridge()->getCpp2Uno() );
			}
			// destroy temp cpp param => cpp: every param was constructed
			uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
			
			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
		}
		// return value
		if (pCppReturn && pUnoReturn != pCppReturn)
		{
			uno_copyAndConvertData( pUnoReturn, pCppReturn, pReturnTypeDescr,
									pThis->getBridge()->getCpp2Uno() );
			uno_destructData( pCppReturn, pReturnTypeDescr, cpp_release );
		}
	}
 	catch (...)
 	{
  		// fill uno exception
		fillUnoException( CPPU_CURRENT_NAMESPACE::__cxa_get_globals()->caughtExceptions, 
			*ppUnoExc, pThis->getBridge()->getCpp2Uno() );

        
		// temporary params
		for ( ; nTempIndizes--; )
		{
			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
			// destroy temp cpp param => cpp: every param was constructed
			uno_destructData( pCppArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], cpp_release );
			TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
		}
		// return type
		if (pReturnTypeDescr)
			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
	}
}
}

namespace bridges { namespace cpp_uno { namespace shared {

void unoInterfaceProxyDispatch(
	uno_Interface * pUnoI, const typelib_TypeDescription * pMemberDescr,
	void * pReturn, void * pArgs[], uno_Any ** ppException )
{
#ifdef CMC_DEBUG
	fprintf(stderr, "unoInterfaceProxyDispatch\n");
#endif
	

	// is my surrogate
        bridges::cpp_uno::shared::UnoInterfaceProxy * pThis 
            = static_cast< bridges::cpp_uno::shared::UnoInterfaceProxy *> (pUnoI);
	typelib_InterfaceTypeDescription * pTypeDescr = pThis->pTypeDescr;
	
	switch (pMemberDescr->eTypeClass)
	{
	case typelib_TypeClass_INTERFACE_ATTRIBUTE:
	{

        VtableSlot aVtableSlot(
            getVtableSlot(
                reinterpret_cast<
                    typelib_InterfaceAttributeTypeDescription const * >(
                        pMemberDescr)));

		if (pReturn)
		{
			// dependent dispatch
			cpp_call(
				pThis, aVtableSlot,
				((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef,
				0, 0, // no params
				pReturn, pArgs, ppException );
		}
		else
		{
			// is SET
			typelib_MethodParameter aParam;
			aParam.pTypeRef =
				((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef;
			aParam.bIn		= sal_True;
			aParam.bOut		= sal_False;

			typelib_TypeDescriptionReference * pReturnTypeRef = 0;
			OUString aVoidName( RTL_CONSTASCII_USTRINGPARAM("void") );
			typelib_typedescriptionreference_new(
				&pReturnTypeRef, typelib_TypeClass_VOID, aVoidName.pData );
			
			// dependent dispatch
                        aVtableSlot.index += 1; //get then set method
			cpp_call(
				pThis, aVtableSlot,
				pReturnTypeRef,
				1, &aParam,
				pReturn, pArgs, ppException );
			
			typelib_typedescriptionreference_release( pReturnTypeRef );
		}
		
		break;
	}
	case typelib_TypeClass_INTERFACE_METHOD:
	{

        VtableSlot aVtableSlot(
            getVtableSlot(
                reinterpret_cast<
                    typelib_InterfaceMethodTypeDescription const * >(
                        pMemberDescr)));
		switch (aVtableSlot.index)
		{
			// standard calls
		case 1: // acquire uno interface
			(*pUnoI->acquire)( pUnoI );
			*ppException = 0;
			break;
		case 2: // release uno interface
			(*pUnoI->release)( pUnoI );
			*ppException = 0;
			break;
		case 0: // queryInterface() opt
		{
			typelib_TypeDescription * pTD = 0;
			TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pArgs[0] )->getTypeLibType() );
			if (pTD)
			{
                uno_Interface * pInterface = 0;
                (*pThis->pBridge->getUnoEnv()->getRegisteredInterface)(
                    pThis->pBridge->getUnoEnv(),
                    (void **)&pInterface, pThis->oid.pData, (typelib_InterfaceTypeDescription *)pTD );
			
                if (pInterface)
                {
                    ::uno_any_construct(
                        reinterpret_cast< uno_Any * >( pReturn ),
                        &pInterface, pTD, 0 );
                    (*pInterface->release)( pInterface );
                    TYPELIB_DANGER_RELEASE( pTD );
                    *ppException = 0;
                    break;
                }
                TYPELIB_DANGER_RELEASE( pTD );
            }
		} // else perform queryInterface()
		default:
			// dependent dispatch
			cpp_call(
				pThis, aVtableSlot,
				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pReturnTypeRef,
				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->nParams,
				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pParams,
				pReturn, pArgs, ppException );
		}
		break;
	}
	default:
	{
		::com::sun::star::uno::RuntimeException aExc(
			OUString( RTL_CONSTASCII_USTRINGPARAM("illegal member type description!") ),
			::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >() );
		
		Type const & rExcType = ::getCppuType( &aExc );
		// binary identical null reference
		::uno_type_any_construct( *ppException, &aExc, rExcType.getTypeLibType(), 0 );
	}
	}
}

} } }
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