/**************************************************************
 * 
 * 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 <com/sun/star/uno/genfunc.hxx>
#include <typelib/typedescription.hxx>
#include <uno/data.h>
#include "bridges/cpp_uno/shared/bridge.hxx"
#include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
#include "bridges/cpp_uno/shared/types.hxx"
#include "bridges/cpp_uno/shared/vtablefactory.hxx"
#include "share.hxx"

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

namespace
{
//==================================================================================================
static typelib_TypeClass cpp2uno_call(
	 bridges::cpp_uno::shared::CppInterfaceProxy * pThis,
	const typelib_TypeDescription * pMemberTypeDescr,
	typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return
	sal_Int32 nParams, typelib_MethodParameter * pParams,
	void ** pCallStack,
	sal_Int64 * pRegisterReturn /* space for register return */ )
{
	// pCallStack: [ret ptr], this, params
	char * pCppStack = (char *)pCallStack;

	// return
	typelib_TypeDescription * pReturnTypeDescr = 0;
	if (pReturnTypeRef)
		TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
	
	void * pUnoReturn = 0;
	void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need
	
	if (pReturnTypeDescr)
	{
		if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
			pUnoReturn = pRegisterReturn; // direct way for simple types
		else // complex return via ptr (pCppReturn)
		{
			pCppReturn = *(void**)pCppStack;
			pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType(
  	                             pReturnTypeDescr )
						  ? alloca( pReturnTypeDescr->nSize )
						  : pCppReturn); // direct way
			pCppStack += sizeof( void* );
		}
	}
	// pop this
	pCppStack += sizeof( void* );

	// stack space
	OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
	// parameters
	void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
	void ** pCppArgs = pUnoArgs + nParams;
	// indizes of values this have to be converted (interface conversion cpp<=>uno)
	sal_Int32 * pTempIndizes = (sal_Int32 *)(pUnoArgs + (2 * nParams));
	// type descriptions for reconversions
	typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * 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 ))  // value
		{
			pCppArgs[nPos] = pUnoArgs[nPos] = CPPU_CURRENT_NAMESPACE::adjustPointer(pCppStack, pParamTypeDescr);
			switch (pParamTypeDescr->eTypeClass)
			{
			case typelib_TypeClass_HYPER:
			case typelib_TypeClass_UNSIGNED_HYPER:
            		case typelib_TypeClass_DOUBLE:
            		{
			if ((reinterpret_cast< long >(pCppStack) & 7) != 0)
              		{
		   		OSL_ASSERT( sizeof (double) == sizeof (sal_Int64) );
                   		void * pDest = alloca( sizeof (sal_Int64) );
                  	 	*reinterpret_cast< sal_Int32 * >(pDest) =
                   		*reinterpret_cast< sal_Int32 const * >(pCppStack);
                   		*(reinterpret_cast< sal_Int32 * >(pDest) + 1) =
                   		*(reinterpret_cast< sal_Int32 const * >(pCppStack) + 1);
                   		pCppArgs[nPos] = pUnoArgs[nPos] = pDest;
			}
		   	pCppStack += sizeof (sal_Int32); // extra long
                   	break;
			default:
			break;
			}
			}
			// no longer needed
			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
		}
		else // ptr to complex value | ref
		{
			pCppArgs[nPos] = *(void **)pCppStack;

			if (! rParam.bIn) // is pure out
			{
				// uno out is unconstructed mem!
				pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
				pTempIndizes[nTempIndizes] = nPos;
				// will be released at reconversion
				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
			}
			// is in/inout
			else if (bridges::cpp_uno::shared::relatesToInterfaceType(
  	                        pParamTypeDescr ))
			{
				uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
										*(void **)pCppStack, pParamTypeDescr,
										  pThis->getBridge()->getCpp2Uno() );
				pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
				// will be released at reconversion
				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
			}
			else // direct way
			{
				pUnoArgs[nPos] = *(void **)pCppStack;
				// no longer needed
				TYPELIB_DANGER_RELEASE( pParamTypeDescr );
			}
		}
		pCppStack += sizeof(sal_Int32); // standard parameter length
	}
	
	// ExceptionHolder
	uno_Any aUnoExc; // Any will be constructed by callee
	uno_Any * pUnoExc = &aUnoExc;

	// invoke uno dispatch call
	(*pThis->getUnoI()->pDispatcher)(pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );
	
	// in case an exception occured...
	if (pUnoExc)
	{
		// destruct temporary in/inout params
		for ( ; nTempIndizes--; )
		{
			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
			
			if (pParams[nIndex].bIn) // is in/inout => was constructed
				uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], 0 );
			TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
		}
		if (pReturnTypeDescr)
			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
		CPPU_CURRENT_NAMESPACE::raiseException(&aUnoExc, pThis->getBridge()->getUno2Cpp() );
  	           // has to destruct the any
		// is here for dummy
		return typelib_TypeClass_VOID;
	}
	else // else no exception occured...
	{
		// temporary params
		for ( ; nTempIndizes--; )
		{
			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
			typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
			
			if (pParams[nIndex].bOut) // inout/out
			{
				// convert and assign
				uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
				uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr,
									pThis->getBridge()->getUno2Cpp() );
			}
			// destroy temp uno param
			uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );
			
			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
		}
		// return
		if (pCppReturn) // has complex return
		{
			if (pUnoReturn != pCppReturn) // needs reconversion
			{
				uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr,
										pThis->getBridge()->getUno2Cpp() );
				// destroy temp uno return
				uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
			}
			// complex return ptr is set to eax
			*(void **)pRegisterReturn = pCppReturn;
		}
		if (pReturnTypeDescr)
		{
			typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
			return eRet;
		}
		else
			return typelib_TypeClass_VOID;
	}
}


//==================================================================================================
static typelib_TypeClass cpp_mediate(
	sal_Int32	nFunctionIndex,
	sal_Int32	nVtableOffset,
	void **	pCallStack,
	sal_Int64 * pRegisterReturn /* space for register return */ )
{
	OSL_ENSURE( sizeof(sal_Int32)==sizeof(void *), "### unexpected!" );

	// pCallStack: this, params
	// eventual [ret*] lies at pCallStack -1
	// so count down pCallStack by one to keep it simple
	// pCallStack: this, params
	// eventual [ret*] lies at pCallStack -1
	// so count down pCallStack by one to keep it simple
	bridges::cpp_uno::shared::CppInterfaceProxy * pCppI
		= bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
	static_cast< char * >(*pCallStack) - nVtableOffset);
	if ((nFunctionIndex & 0x80000000) != 0) {
		nFunctionIndex &= 0x7FFFFFFF;
		--pCallStack;
	}

	typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();

	OSL_ENSURE( nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex,
				 "### illegal vtable index!" );
	if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex)
	{
		throw RuntimeException( rtl::OUString::createFromAscii("illegal vtable index!"), (XInterface *)pCppI );
	}
	
	// determine called method
	sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
	OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### illegal member index!" );

	TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );

#if defined BRIDGES_DEBUG
	OString cstr( OUStringToOString( aMemberDescr.get()->pTypeName, RTL_TEXTENCODING_ASCII_US ) );
	fprintf( stderr, "calling %s, nFunctionIndex=%d\n", cstr.getStr(), nFunctionIndex );
#endif

	typelib_TypeClass eRet;
	switch (aMemberDescr.get()->eTypeClass)
	{
	case typelib_TypeClass_INTERFACE_ATTRIBUTE:
	{
		if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex)
		{
			// is GET method
			eRet = cpp2uno_call(
				pCppI, aMemberDescr.get(),
				((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
				0, 0, // no params
				pCallStack, pRegisterReturn );
		}
		else
		{
			// is SET method
			typelib_MethodParameter aParam;
			aParam.pTypeRef =
				((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef;
			aParam.bIn		= sal_True;
			aParam.bOut		= sal_False;
			
			eRet = cpp2uno_call(
				pCppI, aMemberDescr.get(),
				0, // indicates void return
				1, &aParam,
				pCallStack, pRegisterReturn );
		}
		break;
	}
	case typelib_TypeClass_INTERFACE_METHOD:
	{
		// is METHOD
		switch (nFunctionIndex)
		{
		case 1: // acquire()
			pCppI->acquireProxy(); // non virtual call!
			eRet = typelib_TypeClass_VOID;
			break;
		case 2: // release()
			pCppI->releaseProxy(); // non virtual call!
			eRet = typelib_TypeClass_VOID;
			break;
		case 0: // queryInterface() opt
		{
			typelib_TypeDescription * pTD = 0;
			TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pCallStack[2] )->getTypeLibType() );
			if (pTD)
			{
                XInterface * pInterface = 0;
		(*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)(
		    pCppI->getBridge()->getCppEnv(),
		    (void **)&pInterface, pCppI->getOid().pData, (typelib_InterfaceTypeDescription *)pTD );
			
                if (pInterface)
                {
                    ::uno_any_construct(
                        reinterpret_cast< uno_Any * >( pCallStack[0] ),
                        &pInterface, pTD, cpp_acquire );
                    pInterface->release();
                    TYPELIB_DANGER_RELEASE( pTD );
                    *(void **)pRegisterReturn = pCallStack[0];
                    eRet = typelib_TypeClass_ANY;
                    break;
                }
                TYPELIB_DANGER_RELEASE( pTD );
            }
		} // else perform queryInterface()
		default:
			eRet = cpp2uno_call(
				pCppI, aMemberDescr.get(),
				((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pReturnTypeRef,
				((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->nParams,
				((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pParams,
				pCallStack, pRegisterReturn );
		}
		break;
	}
	default:
	{
		throw RuntimeException(rtl::OUString::createFromAscii("no member description found!"), (XInterface *)pCppI );
		// is here for dummy
		eRet = typelib_TypeClass_VOID;
	}
	}
	return eRet;
}


//==================================================================================================
/**
 * is called on incoming vtable calls
 * (called by asm snippets)
 */
static void cpp_vtable_call()
{
	sal_Int64 nRegReturn;
	int nFunctionIndex;
	void** pCallStack;
	int vTableOffset;

void * pRegReturn = &nRegReturn;

	__asm__( "st %%i0, %0\n\t"
			"st %%i1, %1\n\t"
 			"st %%i2, %2\n\t"
			: : "m"(nFunctionIndex), "m"(pCallStack), "m"(vTableOffset) );

//	fprintf(stderr,"cpp_mediate nFunctionIndex=%x\n",nFunctionIndex);
//	fflush(stderr);

	sal_Bool bComplex = nFunctionIndex & 0x80000000 ? sal_True : sal_False;
	typelib_TypeClass aType =
		cpp_mediate( nFunctionIndex, vTableOffset, pCallStack+17, (sal_Int64*)&nRegReturn );

	switch( aType )
	{
		case typelib_TypeClass_BOOLEAN:
		case typelib_TypeClass_BYTE:
			__asm__( "ld %0, %%l0\n\t"
					 "ldsb [%%l0], %%i0\n"
					 : : "m"(pRegReturn) );
			break;
		case typelib_TypeClass_CHAR:
		case typelib_TypeClass_SHORT:
		case typelib_TypeClass_UNSIGNED_SHORT:
			__asm__( "ld %0, %%l0\n\t"
					 "ldsh [%%l0], %%i0\n"
					 : : "m"(pRegReturn) );
			break;
		case typelib_TypeClass_HYPER:
		case typelib_TypeClass_UNSIGNED_HYPER:
			__asm__( "ld %0, %%l0\n\t"
					 "ld [%%l0], %%i0\n\t"
					 "add %%l0, 4, %%l0\n\t"
					 "ld [%%l0], %%i1\n\t"
					  : : "m"(pRegReturn) );

			break;
		case typelib_TypeClass_FLOAT:
			__asm__( "ld %0, %%l0\n\t"
					 "ld [%%l0], %%f0\n"
					 : : "m"(pRegReturn) );
			break;
		case typelib_TypeClass_DOUBLE:
			__asm__( "ld %0, %%l0\n\t"
					 "ldd [%%l0], %%f0\n"
					 : : "m"(pRegReturn) );
			break;
		case typelib_TypeClass_VOID:
			break;
		default:
			__asm__( "ld %0, %%l0\n\t"
					 "ld [%%l0], %%i0\n"
					 : : "m"(pRegReturn) );
			break;
	}

	if( bComplex )
	{
		__asm__( "add %i7, 4, %i7\n\t" );
		// after call to complex return valued funcion there is an unimp instruction
	}

}
//__________________________________________________________________________________________________

int const codeSnippetSize = 56;
unsigned char * codeSnippet(
    unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset,
    bool simpleRetType)
{
    sal_uInt32 index = functionIndex;
    if (!simpleRetType) {
        index |= 0x80000000;
    }
    unsigned int * p = reinterpret_cast< unsigned int * >(code);
    OSL_ASSERT(sizeof (unsigned int) == 4);
    // st %o0, [%sp+68]:
    *p++ = 0xD023A044;
    // st %o1, [%sp+72]:
    *p++ = 0xD223A048;
    // st %o2, [%sp+76]:
    *p++ = 0xD423A04C;
    // st %o3, [%sp+80]:
    *p++ = 0xD623A050;
    // st %o4, [%sp+84]:
    *p++ = 0xD823A054;
    // st %o5, [%sp+88]:
    *p++ = 0xDA23A058;
    // sethi %hi(index), %o0:
    *p++ = 0x11000000 | (index >> 10);
    // or %o0, %lo(index), %o0:
    *p++ = 0x90122000 | (index & 0x3FF);
    // sethi %hi(vtableOffset), %o2:
    *p++ = 0x15000000 | (vtableOffset >> 10);
    // or %o2, %lo(vtableOffset), %o2:
    *p++ = 0x9412A000 | (vtableOffset & 0x3FF);
    // sethi %hi(cpp_vtable_call), %o3:
    *p++ = 0x17000000 | (reinterpret_cast< unsigned int >(cpp_vtable_call) >> 10);
    // or %o3, %lo(cpp_vtable_call), %o3:
    *p++ = 0x9612E000 | (reinterpret_cast< unsigned int >(cpp_vtable_call) & 0x3FF);
    // jmpl %o3, %g0:
    *p++ = 0x81C2C000;
    // mov %sp, %o1:
    *p++ = 0x9210000E;
    OSL_ASSERT(
        reinterpret_cast< unsigned char * >(p) - code <= codeSnippetSize);
    return code + codeSnippetSize;
}

} //end of namespace

struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };

bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block)
{
    return static_cast< Slot * >(block) + 2;
}

sal_Size bridges::cpp_uno::shared::VtableFactory::getBlockSize(
    sal_Int32 slotCount)
{
    return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
}

bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::initializeBlock(
    void * block, sal_Int32 slotCount)
{
    Slot * slots = mapBlockToVtable(block);
    slots[-2].fn = 0; //null
    slots[-1].fn = 0; //destructor
    return slots + slotCount;
}

unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
    Slot ** slots, unsigned char * code, sal_PtrDiff writetoexecdiff,
    typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
    sal_Int32 functionCount, sal_Int32 vTableOffset)
{
	(*slots) -= functionCount;
	Slot * s = *slots;
	for (sal_Int32 i = 0; i < type->nMembers; ++i) {
        typelib_TypeDescription * member = 0;
        TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
        OSL_ASSERT(member != 0);
        switch (member->eTypeClass) {
        case typelib_TypeClass_INTERFACE_ATTRIBUTE:
            // Getter:
            (s++)->fn = code + writetoexecdiff;
            code = codeSnippet(
                code, functionOffset++, vTableOffset,
                bridges::cpp_uno::shared::isSimpleType(
                    reinterpret_cast<
		    typelib_InterfaceAttributeTypeDescription * >(
		    member)->pAttributeTypeRef));
            // Setter:
            if (!reinterpret_cast<
                typelib_InterfaceAttributeTypeDescription * >(
                    member)->bReadOnly)
            {
                (s++)->fn = code + writetoexecdiff;
                code = codeSnippet(code, functionOffset++, vTableOffset, true);
            }
            break;

        case typelib_TypeClass_INTERFACE_METHOD:
            (s++)->fn = code + writetoexecdiff;
            code = codeSnippet(
                code, functionOffset++, vTableOffset,
                bridges::cpp_uno::shared::isSimpleType(
                    reinterpret_cast<
                    typelib_InterfaceMethodTypeDescription * >(
                        member)->pReturnTypeRef));
            break;

        default:
            OSL_ASSERT(false);
            break;
        }
        TYPELIB_DANGER_RELEASE(member);
    }
    return code;
}

// use flush code from cc50_solaris_sparc

extern "C" void doFlushCode(unsigned long address, unsigned long count);

void bridges::cpp_uno::shared::VtableFactory::flushCode(
    unsigned char const * begin, unsigned char const * end)
{
    unsigned long n = end - begin;
    if (n != 0) {
        unsigned long adr = reinterpret_cast< unsigned long >(begin);
        unsigned long off = adr & 7;
        doFlushCode(adr - off, (n + off + 7) >> 3);
    }
}