/**************************************************************
 * 
 * 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.
 * 
 *************************************************************/



#define _UWINAPI_
#include <systools/win32/uwinapi.h>

#ifndef _INC_MALLOC
#	include <malloc.h>
#endif

#if defined(_MSC_VER) && (_MSC_VER >= 1400)
#pragma warning(disable:4740)
#endif

#ifndef _INC_TCHAR
#	ifdef UNICODE
#		define _UNICODE
#	endif
#	include <TCHAR.H>
#endif

// Globally disable "warning C4100: unreferenced formal parameter" caused by
// IMPLEMENT_THUNK:
#ifdef _MSC_VER
#pragma warning(disable:4100)
#endif

/* Version macros */

#define MAKE_VER_WIN32( major, minor, build, isWindows ) \
((DWORD)MAKELONG( MAKEWORD( major, minor ), (build) | ( isWindows ? 0x8000 : 0 ) ))

#define MAKE_VER_WIN32_NT( major, minor, build ) \
	MAKE_VER_WIN32( major, minor, build, FALSE )

#define MAKE_VER_WIN32_WINDOWS( major, minor, build ) \
	MAKE_VER_WIN32( major, minor, build, TRUE )

#define VER_WIN32_WINDOWS_95	MAKE_VER_WIN32_WINDOWS( 4, 0, 0 )
#define VER_WIN32_WINDOWS_98	MAKE_VER_WIN32_WINDOWS( 4, 10, 0 )
#define VER_WIN32_WINDOWS_ME	MAKE_VER_WIN32_WINDOWS( 4, 90, 0 )
#define VER_WIN32_NT_NT4		MAKE_VER_WIN32_NT( 4, 0, 0 )
#define VER_WIN32_NT_2000		MAKE_VER_WIN32_NT( 5, 0, 0 )
#define VER_WIN32_NT_XP			MAKE_VER_WIN32_NT( 5, 1, 0 )


#ifdef __cplusplus

#define _AUTO_WSTR2STR( lpStrA, lpStrW ) \
LPSTR	lpStrA; \
if ( lpStrW ) \
{ \
	int	cNeeded = WideCharToMultiByte( CP_ACP, 0, lpStrW, -1, NULL, 0, NULL, NULL ); \
	lpStrA = (LPSTR)_alloca( cNeeded * sizeof(CHAR) ); \
	WideCharToMultiByte( CP_ACP, 0, lpStrW, -1, lpStrA, cNeeded, NULL, NULL ); \
} \
else \
	lpStrA = NULL;


#define AUTO_WSTR2STR( lpStr ) \
	_AUTO_WSTR2STR( lpStr##A, lpStr##W )

#define AUTO_STR( lpStr, cchBuffer ) \
LPSTR	lpStr##A = lpStr##W ? (LPSTR)_alloca( (cchBuffer) * sizeof(CHAR) ) : NULL;

#endif	/* __cplusplus */


#define STRBUF2WSTR( lpStr, cchSrcBuffer, cchDestBuffer ) \
	MultiByteToWideChar( CP_ACP, 0, lpStr##A, cchSrcBuffer, lpStr##W, (int) cchDestBuffer )

#define STR2WSTR( lpStr, cchBuffer ) \
	STRBUF2WSTR( lpStr, -1, cchBuffer )

#define WSTR2STR( lpStr, cchBuffer ) \
	WideCharToMultiByte( CP_ACP, 0, lpStr##W, -1, lpStr##A, cchBuffer, NULL, NULL )

EXTERN_C void WINAPI ResolveThunk_WINDOWS( FARPROC *lppfn, LPCSTR lpLibFileName, LPCSTR lpFuncName, FARPROC lpfnEmulate, FARPROC lpfnFailure );
EXTERN_C void WINAPI ResolveThunk_TRYLOAD( FARPROC *lppfn, LPCSTR lpLibFileName, LPCSTR lpFuncName, FARPROC lpfnEmulate, FARPROC lpfnFailure );
EXTERN_C void WINAPI ResolveThunk_ALLWAYS( FARPROC *lppfn, LPCSTR lpLibFileName, LPCSTR lpFuncName, FARPROC lpfnEmulate, FARPROC lpfnFailure );




#ifdef __MINGW32__
#define IMPLEMENT_THUNK( module, resolve, rettype, calltype, func, params ) \
static void func##_Thunk(); \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr = (FARPROC)func##_Thunk; \
EXTERN_C rettype calltype func params \
{ \
	asm("	popl	%ebp"); \
	asm("	jmp	*(%0)"::"m"(module##_##func##_Ptr)); \
} \
EXTERN_C rettype calltype func##_##resolve params; \
static rettype calltype func##_##Failure params; \
static void func##_Thunk() \
{ \
	ResolveThunk_##resolve( &module##_##func##_Ptr, #module ".dll", #func, (FARPROC)func##_##resolve, (FARPROC)func##_##Failure ); \
	asm("	movl	%ebp, %esp"); \
	asm("	popl	%ebp"); \
	asm("	jmp	*(%0)"::"m"(module##_##func##_Ptr)); \
} \
static rettype calltype func##_##Failure params \
{ \
	SetLastError( ERROR_CALL_NOT_IMPLEMENTED ); \
	return (rettype)0; \
} \
EXTERN_C rettype calltype func##_##resolve params
#else
#define IMPLEMENT_THUNK( module, resolve, rettype, calltype, func, params ) \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr; \
EXTERN_C rettype calltype func##_##resolve params; \
static rettype calltype func##_##Failure params; \
static _declspec ( naked ) void func##_Thunk() \
{ \
	ResolveThunk_##resolve( &module##_##func##_Ptr, #module ".dll", #func, (FARPROC)func##_##resolve, (FARPROC)func##_##Failure ); \
	_asm	jmp	[module##_##func##_Ptr] \
} \
EXTERN_C _declspec( naked ) rettype calltype func params \
{ \
	_asm	jmp	[module##_##func##_Ptr] \
} \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr = (FARPROC)func##_Thunk; \
static rettype calltype func##_##Failure params \
{ \
	SetLastError( ERROR_CALL_NOT_IMPLEMENTED ); \
	return (rettype)0; \
} \
EXTERN_C rettype calltype func##_##resolve params
#endif



#ifdef __MINGW32__
#define DEFINE_CUSTOM_THUNK( module, resolve, rettype, calltype, func, params ) \
static void func##_Thunk(); \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr = (FARPROC)func##_Thunk; \
static void func##_Thunk() \
{ \
	ResolveThunk_##resolve( &module##_##func##_Ptr, #module ".dll", #func ); \
	asm("	movl	%ebp, %esp"); \
	asm("	popl	%ebp"); \
	asm("	jmp	*(%0)"::"m"(module##_##func##_Ptr)); \
} \
EXTERN_C rettype calltype func params \
{ \
	asm("	popl	%ebp"); \
	asm("	jmp	*(%0)"::"m"(module##_##func##_Ptr)); \
}
#else
#define DEFINE_CUSTOM_THUNK( module, resolve, rettype, calltype, func, params ) \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr; \
static _declspec ( naked ) void func##_Thunk() \
{ \
	ResolveThunk_##resolve( &module##_##func##_Ptr, #module ".dll", #func ); \
	_asm	jmp	[module##_##func##_Ptr] \
} \
EXTERN_C _declspec( naked ) rettype calltype func params \
{ \
	_asm	jmp	[module##_##func##_Ptr] \
} \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr = (FARPROC)func##_Thunk;
#endif


#ifdef __MINGW32__
#define DEFINE_DEFAULT_THUNK( module, resolve, rettype, calltype, func, params ) \
static void func##_Thunk(); \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr = (FARPROC)func##_Thunk; \
static rettype calltype func##_##Failure params; \
static _declspec ( naked ) void func##_Thunk() \
{ \
	ResolveThunk_##resolve( &module##_##func##_Ptr, #module ".dll", #func, NULL, (FARPROC)func##_##Failure ); \
	asm("	movl	%ebp, %esp"); \
	asm("	popl	%ebp"); \
	asm("	jmp	*(%0)"::"m"(module##_##func##_Ptr)); \
} \
EXTERN_C _declspec( naked ) rettype calltype func params \
{ \
	asm("	popl	%ebp"); \
	asm("	jmp	*(%0)"::"m"(module##_##func##_Ptr)); \
} \
static rettype calltype func##_##Failure params \
{ \
	SetLastError( ERROR_CALL_NOT_IMPLEMENTED ); \
	return (rettype)0; \
}
#else
#define DEFINE_DEFAULT_THUNK( module, resolve, rettype, calltype, func, params ) \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr; \
static rettype calltype func##_##Failure params; \
static _declspec ( naked ) void func##_Thunk() \
{ \
	ResolveThunk_##resolve( &module##_##func##_Ptr, #module ".dll", #func, NULL, (FARPROC)func##_##Failure ); \
	_asm	jmp	[module##_##func##_Ptr] \
} \
EXTERN_C _declspec( naked ) rettype calltype func params \
{ \
	_asm	jmp	[module##_##func##_Ptr] \
} \
EXTERN_C _declspec( dllexport ) FARPROC module##_##func##_Ptr = (FARPROC)func##_Thunk; \
static rettype calltype func##_##Failure params \
{ \
	SetLastError( ERROR_CALL_NOT_IMPLEMENTED ); \
	return (rettype)0; \
}
#endif