"

 COPYRIGHT (c) 1998 by eXept Software AG

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

ExternalFunction subclass:#WinAPIFunction

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'OS-Windows'

!

!WinAPIFunction primitiveDefinitions!

%{

#ifdef __x86_64__

 // finally, Microsoft got rid of this garbage

 typedef int  (*WINAPI_intFUNC)();

#else

 typedef WINAPI int  (*WINAPI_intFUNC)();

#endif

%}

! !

!WinAPIFunction class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1998 by eXept Software AG

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    WIN32 only:

    Experimental class representing external (non-Smalltalk) WINAPI functions.

    These will provide the same functionality and protocol as

    regular externalFunctions, but use a different calling convention.

    Warning: under construction.

    [author:]

	Claus Gittinger

    [see also:]

	ExternalAddress ExternalBytes

"

! !

!WinAPIFunction methodsFor:'function calling'!

call

    "call the underlying C function, passing no argument.

     The return value is interpreted as an integer

     (and must be converted to an externalBytes object,

      if it is a pointer to something).

     DANGER alert: This is an unprotected low-level entry.

     Not for normal application usage.

    "

%{

    WINAPI_intFUNC func;

    INT retVal;

    func = (WINAPI_intFUNC) __INST(code_);

    if (func) {

	retVal = (*func)();

	RETURN (__MKINT(retVal));

    }

%}.

    self primitiveFailed

    "Created: / 18.6.1998 / 18:01:28 / cg"

    "Modified: / 18.6.1998 / 18:04:48 / cg"

!

callWith:arg

    "call the underlying C function, passing a single argument.

     The argument arg is converted to a corresponding C data type,

     as defined in the convertST_to_C() function.

     The return value is interpreted as an integer

     (and must be converted to an externalBytes object,

      if it is a pointer to something).

     DANGER alert: This is an unprotected low-level entry.

     Not for normal application usage.

    "

%{

    WINAPI_intFUNC func;

    INT retVal;

    func = (WINAPI_intFUNC) __INST(code_);

    if (func) {

	retVal = (*func)(convertST_to_C(arg));

	RETURN (__MKINT(retVal));

    }

%}.

    self primitiveFailed

    "Created: / 18.6.1998 / 18:04:30 / cg"

    "Modified: / 18.6.1998 / 18:04:53 / cg"

!

callWith:arg1 with:arg2

    "call the underlying C function, passing two args.

     The arguments are converted to a corresponding C data type,

     as defined in the convertST_to_C() function.

     The return value is interpreted as an integer

     (and must be converted to an externalBytes object,

      if it is a pointer to something).

     DANGER alert: This is an unprotected low-level entry.

     Not for normal application usage.

    "

%{

    WINAPI_intFUNC func;

    INT retVal;

    func = (WINAPI_intFUNC) __INST(code_);

    if (func) {

	retVal = (*func)(convertST_to_C(arg1), convertST_to_C(arg2));

	RETURN (__MKINT(retVal));

    }

%}.

    self primitiveFailed

    "Created: / 18.6.1998 / 18:05:07 / cg"

!

callWith:arg1 with:arg2 with:arg3

    "call the underlying C function, passing three args.

     The arguments are converted to a corresponding C data type,

     as defined in the convertST_to_C() function.

     The return value is interpreted as an integer

     (and must be converted to an externalBytes object,

      if it is a pointer to something).

     DANGER alert: This is an unprotected low-level entry.

     Not for normal application usage.

    "

%{

    WINAPI_intFUNC func;

    INT retVal;

    func = (WINAPI_intFUNC) __INST(code_);

    if (func) {

	retVal = (*func)(convertST_to_C(arg1), convertST_to_C(arg2), convertST_to_C(arg3));

	RETURN (__MKINT(retVal));

    }

%}.

    self primitiveFailed

    "Created: / 18.6.1998 / 18:05:18 / cg"

!

callWithArguments:argArray

    "call the underlying C function, passing up to 10 arguments.

     The arguments are converted to a corresponding C data type,

     as defined in the convertST_to_C() function.

     The return value is interpreted as an integer

     (and must be converted to an externalBytes object,

      if it is a pointer to something).

     DANGER alert: This is an unprotected low-level entry.

     Not for normal application usage.

    "

%{

    WINAPI_intFUNC func;

#   define NUMARGS 10

    INT args[NUMARGS];

    INT retVal;

    OBJ *ap;

    func = (WINAPI_intFUNC) __INST(code_);

    if (func && __isArrayLike(argArray)) {

	int n = __arraySize(argArray);

	int i;

	if (n <= 10) {

	    ap = __ArrayInstPtr(argArray)->a_element;

	    for (i=0; i<NUMARGS; i++) {

		args[i] = convertST_to_C(*ap++);

	    }

	}

	switch (n) {

	    case 0:

		retVal = (*func)();

		break;

	    case 1:

		retVal = (*func)(args[0]);

		break;

	    case 2:

		retVal = (*func)(args[0], args[1]);

		break;

	    case 3:

		retVal = (*func)(args[0], args[1], args[2]);

		break;

	    case 4:

		retVal = (*func)(args[0], args[1], args[2], args[3]);

		break;

	    case 5:

		retVal = (*func)(args[0], args[1], args[2], args[3],

				 args[4]);

		break;

	    case 6:

		retVal = (*func)(args[0], args[1], args[2], args[3],

				 args[4], args[5]);

		break;

	    case 7:

		retVal = (*func)(args[0], args[1], args[2], args[3],

				 args[4], args[5], args[6]);

		break;

	    case 8:

		retVal = (*func)(args[0], args[1], args[2], args[3],

				 args[4], args[5], args[6], args[7]);

		break;

	    case 9:

		retVal = (*func)(args[0], args[1], args[2], args[3],

				 args[4], args[5], args[6], args[7],

				 args[8]);

		break;

	    case 10:

		retVal = (*func)(args[0], args[1], args[2], args[3],

				 args[4], args[5], args[6], args[7],

				 args[8], args[9]);

		break;

	    default:

		goto err;

	}

	RETURN (__MKINT(retVal));

    }

  err: ;

%}.

    self primitiveFailed

    "Created: / 18.6.1998 / 18:05:46 / cg"

! !

!WinAPIFunction class methodsFor:'documentation'!

version

    ^ '$Header$'

! !