/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the 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"

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

namespace
{
//==================================================================================================
// The call instruction within the asm section of callVirtualMethod may throw
// exceptions.  So that the compiler handles this correctly, it is important
// that (a) callVirtualMethod might call dummy_can_throw_anything (although this
// never happens at runtime), which in turn can throw exceptions, and (b)
// callVirtualMethod is not inlined at its call site (so that any exceptions are
// caught which are thrown from the instruction calling callVirtualMethod):

void callVirtualMethod( void * pAdjustedThisPtr,
                        sal_Int32 nVtableIndex,
                        void * pRegisterReturn,
                        typelib_TypeClass eReturnType,
                        sal_Int32 * pStackLongs,
                        sal_Int32 nStackLongs ) __attribute__((noinline));

void callVirtualMethod( void * pAdjustedThisPtr,
                        sal_Int32 /* nVtableIndex */,
                        void * pRegisterReturn,
                        typelib_TypeClass eReturnType,
#if OSL_DEBUG_LEVEL > 0
                        sal_Int32 * pStackLongs,
                        sal_Int32 nStackLongs)
#else
                        sal_Int32 * /*pStackLongs*/,
                        sal_Int32 /*nStackLongs*/)
#endif
{
	// parameter list is mixed list of * and values
	// reference parameters are pointers

	OSL_ENSURE( pStackLongs && pAdjustedThisPtr, "### null ptr!" );
	OSL_ENSURE( (sizeof(void *) == 4) &&
				 (sizeof(sal_Int32) == 4), "### unexpected size of int!" );
	OSL_ENSURE( nStackLongs && pStackLongs, "### no stack in callVirtualMethod !" );

    // never called
    if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something

	volatile long o0 = 0, o1 = 0; // for register returns
	volatile double f0d = 0;
	volatile float f0f = 0;
	volatile long long saveReg[7];

	__asm__ (
		// save registers
		"std %%l0, [%4]\n\t"
		"mov %4, %%l0\n\t"
		"mov %%l0, %%l1\n\t"
		"add %%l0, 8, %%l0\n\t"
		"std %%l2, [%%l0]\n\t"
		"add %%l0, 8, %%l0\n\t"
		"std %%l4, [%%l0]\n\t"
		"add %%l0, 8, %%l0\n\t"
		"std %%o0, [%%l0]\n\t"
		"add %%l0, 8, %%l0\n\t"
		"std %%o2, [%%l0]\n\t"
		"add %%l0, 8, %%l0\n\t"
		"std %%o4, [%%l0]\n\t"
		"add %%l0, 8, %%l0\n\t"
		"std %%l6, [%%l0]\n\t"
		"mov %%l1, %%l7\n\t"

		// increase our own stackframe if necessary
		"mov %%sp, %%l3\n\t"		// save stack ptr for readjustment

		"subcc %%i5, 7, %%l0\n\t"
		"ble .LmoveOn\n\t"
		"nop\n\t"

		"sll %%l0, 2, %%l0\n\t"
		"add %%l0, 96, %%l0\n\t"
		"mov %%sp, %%l1\n\t"		// old stack ptr
		"sub %%sp, %%l0, %%l0\n\t"	// future stack ptr
		"andcc %%l0, 7, %%g0\n\t"	// align stack to 8
		"be .LisAligned\n\t"
		"nop\n\t"
		"sub %%l0, 4, %%l0\n"
	".LisAligned:\n\t"
		"mov %%l0, %%o5\n\t"			// save newly computed stack ptr
		"add %%g0, 16, %%o4\n"

		// now copy longs down to save register window
		// and local variables
	".LcopyDown:\n\t"
		"ld [%%l1], %%l2\n\t"
		"st %%l2,[%%l0]\n\t"
		"add %%l0, 4, %%l0\n\t"
		"add %%l1, 4, %%l1\n\t"
		"subcc %%o4, 1, %%o4\n\t"
		"bne .LcopyDown\n\t"

		"mov %%o5, %%sp\n\t"		// move new stack ptr (hopefully) atomically
		// while register window is valid in both spaces
		// (scheduling might hit in copyDown loop)

		"sub %%i5, 7, %%l0\n\t"		// copy parameters past the sixth to stack
		"add %%i4, 28, %%l1\n\t"
		"add %%sp, 92, %%l2\n"
	".LcopyLong:\n\t"
		"ld [%%l1], %%o0\n\t"
		"st %%o0, [%%l2]\n\t"
		"add %%l1, 4, %%l1\n\t"
		"add %%l2, 4, %%l2\n\t"
		"subcc %%l0, 1, %%l0\n\t"
		"bne .LcopyLong\n\t"
		"nop\n"

	".LmoveOn:\n\t"
		"mov %%i5, %%l0\n\t"		// prepare out registers
		"mov %%i4, %%l1\n\t"

		"ld [%%l1], %%o0\n\t"		// prepare complex return ptr
		"st %%o0, [%%sp+64]\n\t"
		"sub %%l0, 1, %%l0\n\t"
		"add %%l1, 4, %%l1\n\t"

		"ld [%%l1], %%o0\n\t"
		"subcc %%l0, 1, %%l0\n\t"
		"be .LdoCall\n\t"
		"nop\n\t"

		"add %%l1, 4, %%l1\n\t"
		"ld [%%l1], %%o1\n\t"
		"subcc %%l0, 1, %%l0\n\t"
		"be .LdoCall\n\t"
		"nop\n\t"

		"add %%l1, 4, %%l1\n\t"
		"ld [%%l1], %%o2\n\t"
		"subcc %%l0, 1, %%l0\n\t"
		"be .LdoCall\n\t"
		"nop\n\t"

		"add %%l1, 4, %%l1\n\t"
		"ld [%%l1], %%o3\n\t"
		"subcc %%l0, 1, %%l0\n\t"
		"be .LdoCall\n\t"
		"nop\n\t"

		"add %%l1, 4, %%l1\n\t"
		"ld [%%l1], %%o4\n\t"
		"subcc %%l0, 1, %%l0\n\t"
		"be .LdoCall\n\t"
		"nop\n\t"

		"add %%l1, 4, %%l1\n\t"
		"ld [%%l1], %%o5\n"

	".LdoCall:\n\t"
		"ld [%%i0], %%l0\n\t"		// get vtable ptr

"sll %%i1, 2, %%l6\n\t"
//        "add %%l6, 8, %%l6\n\t"
		"add %%l6, %%l0, %%l0\n\t"
// 		// vtable has 8byte wide entries,
// 		// upper half contains 2 half words, of which the first
// 		// is the this ptr patch !
// 		// first entry is (or __tf)

// 		"ldsh [%%l0], %%l6\n\t"		// load this ptr patch
// 		"add %%l6, %%o0, %%o0\n\t"	// patch this ptr

// 		"add %%l0, 4, %%l0\n\t"		// get virtual function ptr
		"ld [%%l0], %%l0\n\t"

		"ld [%%i4], %%l2\n\t"
		"subcc %%l2, %%g0, %%l2\n\t"
		"bne .LcomplexCall\n\t"
		"nop\n\t"
		"call %%l0\n\t"
		"nop\n\t"
		"ba .LcallReturned\n\t"
		"nop\n"
	".LcomplexCall:\n\t"
		"call %%l0\n\t"
		"nop\n\t"
		"unimp\n"

	".LcallReturned:\n\t"
		"mov %%l3, %%sp\n\t"		// readjust stack so that our locals are where they belong
		"st %%o0, %0\n\t"			// save possible return registers into our locals
		"st %%o1, %1\n\t"
		"std %%f0, %2\n\t"
		"st %%f0, %3\n\t"

		// restore registers
		"ldd [%%l7], %%l0\n\t"
		"add %%l7, 8, %%l7\n\t"
		"ldd [%%l7], %%l2\n\t"
		"add %%l7, 8, %%l7\n\t"
		"ldd [%%l7], %%l4\n\t"
		"add %%l7, 8, %%l7\n\t"
		"ldd [%%l7], %%o0\n\t"
		"add %%l7, 8, %%l7\n\t"
		"ldd [%%l7], %%o2\n\t"
		"add %%l7, 8, %%l7\n\t"
		"ldd [%%l7], %%o4\n\t"
		"add %%l7, 8, %%l7\n\t"
		"ldd [%%l7], %%l6\n\t"
		: :
		"m"(o0),
		"m"(o1),
		"m"(f0d),
		"m"(f0f),
		"r"(&saveReg[0])
		);
	switch( eReturnType )
	{
		case typelib_TypeClass_HYPER:
		case typelib_TypeClass_UNSIGNED_HYPER:
			((long*)pRegisterReturn)[1] = o1;
		case typelib_TypeClass_LONG:
		case typelib_TypeClass_UNSIGNED_LONG:
		case typelib_TypeClass_ENUM:
			((long*)pRegisterReturn)[0] = o0;
			break;
		case typelib_TypeClass_CHAR:
		case typelib_TypeClass_SHORT:
		case typelib_TypeClass_UNSIGNED_SHORT:
			*(unsigned short*)pRegisterReturn = (unsigned short)o0;
			break;
		case typelib_TypeClass_BOOLEAN:
		case typelib_TypeClass_BYTE:
			*(unsigned char*)pRegisterReturn = (unsigned char)o0;
			break;
		case typelib_TypeClass_FLOAT:
			*(float*)pRegisterReturn = f0f;
			break;
		case typelib_TypeClass_DOUBLE:
			*(double*)pRegisterReturn = f0d;
			break;
		default:
			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, this, values|ptr ...
  	char * pCppStack	=
  		(char *)alloca( (nParams+2) * sizeof(sal_Int64) );
  	char * pCppStackStart	= pCppStack;
	
	// 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
			*(void**)pCppStack = NULL;
		}
		else
		{
			// complex return via ptr
			pCppReturn = *(void **)pCppStack = (bridges::cpp_uno::shared::relatesToInterfaceType(pReturnTypeDescr )
												? alloca( pReturnTypeDescr->nSize )
												: pUnoReturn); // direct way
		}
		pCppStack += sizeof(void*);
	}
	// push this
	void * pAdjustedThisPtr = reinterpret_cast< void ** >(pThis->getCppI())
  	       + aVtableSlot.offset;
  	       *(void**)pCppStack = pAdjustedThisPtr;
	pCppStack += sizeof( void* );

	// 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 ))
		{
			pCppArgs[ nPos ] = CPPU_CURRENT_NAMESPACE::adjustPointer(pCppStack, pParamTypeDescr );
			
			switch (pParamTypeDescr->eTypeClass)
			{
			case typelib_TypeClass_HYPER:
			case typelib_TypeClass_UNSIGNED_HYPER:
			case typelib_TypeClass_DOUBLE:
                        OSL_ASSERT( sizeof (double) == sizeof (sal_Int64) );
                          *reinterpret_cast< sal_Int32 * >(pCppStack) =
                          *reinterpret_cast< sal_Int32 const * >(pUnoArgs[ nPos ]);
                          pCppStack += sizeof (sal_Int32);
                          *reinterpret_cast< sal_Int32 * >(pCppStack) =
                          *(reinterpret_cast< sal_Int32 const * >(pUnoArgs[ nPos ] ) + 1);
                          break;
            		default:
                          uno_copyAndConvertData(
                             pCppArgs[nPos], pUnoArgs[nPos], pParamTypeDescr,
                            pThis->getBridge()->getUno2Cpp() );
                          break;
                        }
			// 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 );
			}
		}
		pCppStack += sizeof(sal_Int32); // standard parameter length
	}

	try
	{
		int nStackLongs = (pCppStack - pCppStackStart)/sizeof(sal_Int32);
		OSL_ENSURE( !( (pCppStack - pCppStackStart ) & 3), "UNALIGNED STACK !!! (Please DO panic" );
		
		if( nStackLongs & 1 )
			// stack has to be 8 byte aligned
			nStackLongs++;
		callVirtualMethod(
			pAdjustedThisPtr,
			aVtableSlot.index,
			pCppReturn,
			pReturnTypeDescr->eTypeClass,
			(sal_Int32 *)pCppStackStart,
			 nStackLongs);
		// 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( ... )
 	{
 		// get 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 )
{
#if defined BRIDGES_DEBUG
    OString cstr( OUStringToOString( pMemberDescr->pTypeName, RTL_TEXTENCODING_ASCII_US ) );
    fprintf( stderr, "received dispatch( %s )\n", cstr.getStr() );
#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 );
	}
	}
}

} } }