Easy,
/*
* $Id: dllcall.c,v 1.13 2007/09/25 02:55:30 ronpinkas Exp $
*/
/*
* Harbour Project source code:
* Xbase++ Compatibility functions
* Copyright 2006 Paul Tucker <ptucker@sympatico.ca>
* Additional copyrights below.
*
* See doc/license.txt for licensing terms.
*
* www - http://www.harbour-project.org; http://www.xharbour.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option )
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/ ).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*/
/*
* Notes:
*
* I'm not totally familiar with how Xbase++ works. This functionality was
* derived from the context in which the functions are used.
*
* pt
*
*/
#define _WIN32_WINNT 0x0400
#define WIN32_LEAN_AND_MEAN
#include "hbapiitm.h"
#if defined( HB_OS_WIN_32 )
#include <windows.h>
#include "hbdll.ch"
#define EXEC_DLL 0x45584543
typedef struct tag_ExecStruct
{
DWORD dwType; // type info
char * cDLL; // DLL
HINSTANCE hDLL; // Handle
char * cProc; // Ordinal or Name
DWORD dwOrdinal;
DWORD dwFlags; // Calling Flags
LPVOID lpFunc;
} EXECSTRUCT, *PEXECSTRUCT;
static PHB_DYNS pHB_CSTRUCTURE = NULL, pPOINTER, pVALUE, pBUFFER, pDEVALUE;
#include "hbapi.h"
#include "hbstack.h"
#include "hbvm.h"
HB_EXTERN_BEGIN
HB_EXPORT char * hb_parcstruct( int iParam, ... );
HB_EXTERN_END
HB_EXPORT char * hb_parcstruct( int iParam, ... )
{
HB_THREAD_STUB_ANY
HB_TRACE(HB_TR_DEBUG, ("hb_parcstruct(%d, ...)", iParam));
if( pHB_CSTRUCTURE == NULL )
{
pHB_CSTRUCTURE = hb_dynsymFind( "HB_CSTRUCTURE" );
pPOINTER = hb_dynsymGetCase( "POINTER" );
pVALUE = hb_dynsymGetCase( "VALUE" );
pBUFFER = hb_dynsymGetCase( "BUFFER" );
pDEVALUE = hb_dynsymGetCase( "DEVALUE" );
}
if( ( iParam >= 0 && iParam <= hb_pcount() ) || ( iParam == -1 ) )
{
PHB_ITEM pItem = ( iParam == -1 ) ? hb_stackReturnItem() : hb_stackItemFromBase( iParam );
BOOL bRelease = FALSE;
if( HB_IS_BYREF( pItem ) )
{
pItem = hb_itemUnRef( pItem );
}
if( HB_IS_ARRAY( pItem ) && ! HB_IS_OBJECT( pItem ) )
{
va_list va;
ULONG ulArrayIndex;
PHB_ITEM pArray = pItem;
va_start( va, iParam );
ulArrayIndex = va_arg( va, ULONG );
va_end( va );
pItem = hb_itemNew( NULL );
bRelease = TRUE;
hb_arrayGet( pArray, ulArrayIndex, pItem );
}
if( strncmp( hb_objGetClsName( pItem ), "C Structure", 11 ) == 0 )
{
hb_vmPushSymbol( pVALUE->pSymbol );
hb_vmPush( pItem );
hb_vmSend(0);
if( bRelease )
{
hb_itemRelease( pItem );
}
return hb_stackReturnItem()->item.asString.value;
}
}
return NULL;
}
static HB_GARBAGE_FUNC( _DLLUnload )
{
PEXECSTRUCT xec = (PEXECSTRUCT) Cargo; // provided by decl.
if ( xec->dwType == EXEC_DLL )
{
if ( xec->cDLL != NULL )
{
if ( xec->hDLL != (HINSTANCE) 0 )
{
FreeLibrary( xec->hDLL );
}
hb_xfree( xec->cDLL );
}
if ( xec->cProc != NULL )
{
hb_xfree( xec->cProc );
}
xec->dwType = 0;
}
}
HB_FUNC( DLLPREPARECALL )
{
PEXECSTRUCT xec = (PEXECSTRUCT) hb_gcAlloc( sizeof( EXECSTRUCT ), _DLLUnload );
memset( xec, 0, sizeof( EXECSTRUCT ) );
if ( ISCHAR( 1 ) )
{
xec->cDLL = hb_strdup( hb_parc( 1 ) );
xec->hDLL = LoadLibrary( xec->cDLL );
}
else if (ISNUM( 1 ) )
{
xec->hDLL = (HINSTANCE) hb_parnl( 1 );
}
if (ISNUM( 2 ) )
{
xec->dwFlags = hb_parnl( 2 );
}
else
{
xec->dwFlags = DC_CALL_STD;
}
if ( xec->hDLL )
{
if ( ISCHAR( 3 ) )
{
// Not a typo - reserving space for possible Ansi 'A' suffix!
xec->cProc = (char *) hb_xgrab( hb_parclen(3) + 2 );
strncpy( xec->cProc, hb_parc(3), hb_parclen(3) + 1 );
}
else if (ISNUM( 3 ) )
{
xec->dwOrdinal = hb_parnl( 3 );
}
}
else
{
if( xec->cDLL )
{
MessageBox( GetActiveWindow(), "DllPrepareCall:LoadLibrary() failed!", xec->cDLL, MB_OK | MB_ICONERROR );
}
else
{
MessageBox( GetActiveWindow(), "DllPrepareCall() invalid handle argument!", "DllPrepareCall", MB_OK | MB_ICONERROR );
}
}
xec->dwType = EXEC_DLL;
xec->lpFunc = (LPVOID) GetProcAddress( xec->hDLL, xec->cProc != NULL ? (LPCSTR) xec->cProc : (LPCSTR) xec->dwOrdinal );
if( xec->lpFunc == NULL && xec->cProc )
{
// try ANSI flavour ?
xec->cProc[ hb_parclen(3) ] = 'A';
xec->cProc[ hb_parclen(3) +1 ] = '\0';
xec->lpFunc = (LPVOID) GetProcAddress( xec->hDLL, xec->cProc != NULL ? (LPCSTR) xec->cProc : (LPCSTR) xec->dwOrdinal );
}
if( xec->hDLL && xec->lpFunc )
{
hb_retptrGC( xec );
}
else if( xec->hDLL && xec->lpFunc == NULL )
{
if( xec->cProc )
{
LPVOID lpMsgBuf;
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
MessageBox( GetActiveWindow(), (LPCSTR) lpMsgBuf, "DllPrepareCall:GetProcAddress() failed!", MB_OK | MB_ICONERROR );
LocalFree(lpMsgBuf);
}
else
{
MessageBox( GetActiveWindow(), "DllPrepareCall:GetProcAddress() invalid oridnal argument!", "DllPrepareCall", MB_OK | MB_ICONERROR );
}
}
}
HB_FUNC( LOADLIBRARY )
{
hb_retnl( (DWORD) LoadLibraryA( (LPCSTR) hb_parcx( 1 ) ) ) ;
}
HB_FUNC( FREELIBRARY )
{
hb_retl( FreeLibrary( (HMODULE) hb_parnl( 1 ) ) ) ;
}
// compatibility
HB_FUNC( DLLLOAD )
{
HB_FUNCNAME( LOADLIBRARY )();
}
// compatibility
HB_FUNC( DLLUNLOAD )
{
HB_FUNCNAME( FREELIBRARY )();
}
HB_FUNC( GETLASTERROR )
{
hb_retnl( GetLastError() );
}
HB_FUNC( SETLASTERROR )
{
hb_retnl( GetLastError() );
SetLastError( hb_parnl(1) );
}
HB_FUNC( GETPROCADDRESS )
{
LPVOID lpProcAddr;
char cFuncName[MAX_PATH];
if ((lpProcAddr = (LPVOID) GetProcAddress( (HMODULE) hb_parnl(1),
ISCHAR( 2 ) ? (LPCSTR) hb_parcx(2) :
(LPCSTR) hb_parnl(2) )) == 0 )
{
if ( ISCHAR( 2 ) )
{
// try ANSI flavour ?
strcpy(cFuncName, hb_parc(2));
strcat(cFuncName, "A");
lpProcAddr = (LPVOID) GetProcAddress((HMODULE) hb_parnl(1), cFuncName);
}
}
hb_retptr( lpProcAddr );
}
//==================================================================
// See DynaCall support comments below
#define DC_CALL_STD_BO (DC_CALL_STD | DC_BORLAND)
#define DC_CALL_STD_MS (DC_CALL_STD | DC_MICROSOFT)
#define DC_CALL_STD_M8 (DC_CALL_STD | DC_RETVAL_MATH8)
#define DC_FLAG_ARGPTR 0x00000002
#define CTYPE_VOID 0
#define CTYPE_CHAR 1
#define CTYPE_UNSIGNED_CHAR -1
#define CTYPE_CHAR_PTR 10
#define CTYPE_UNSIGNED_CHAR_PTR -10
#define CTYPE_SHORT 2
#define CTYPE_UNSIGNED_SHORT -2
#define CTYPE_SHORT_PTR 20
#define CTYPE_UNSIGNED_SHORT_PTR -20
#define CTYPE_INT 3
#define CTYPE_UNSIGNED_INT -3
#define CTYPE_INT_PTR 30
#define CTYPE_UNSIGNED_INT_PTR -30
#define CTYPE_LONG 4
#define CTYPE_UNSIGNED_LONG -4
#define CTYPE_LONG_PTR 40
#define CTYPE_UNSIGNED_LONG_PTR -40
#define CTYPE_FLOAT 5
#define CTYPE_FLOAT_PTR 50
#define CTYPE_DOUBLE 6
#define CTYPE_DOUBLE_PTR 60
#define CTYPE_VOID_PTR 7
#define CTYPE_BOOL 8
#define CTYPE_STRUCTURE 1000
#define CTYPE_STRUCTURE_PTR 10000
#pragma pack(1)
typedef union RESULT { // Various result types
int Int; // Generic four-byte type
long Long; // Four-byte long
void *Pointer; // 32-bit pointer
float Float; // Four byte real
double Double; // 8-byte real
__int64 int64; // big int (64-bit)
} RESULT;
typedef struct DYNAPARM {
DWORD dwFlags; // Parameter flags
int nWidth; // Byte width
union { //
BYTE bArg; // 1-byte argument
SHORT usArg; // 2-byte argument
DWORD dwArg; // 4-byte argument
double dArg;
};
void *pArg; // Pointer to argument
} DYNAPARM;
#pragma pack()
RESULT DynaCall(int Flags, LPVOID lpFunction, int nArgs,
DYNAPARM Parm[], LPVOID pRet, int nRetSiz);
//
//==================================================================
// Based originally on CallDLL from What32
static void DllExec( int iFlags, LPVOID lpFunction, int iParams, int iFirst, int iArgCnt, PEXECSTRUCT xec )
{
int iRtype;
int iCnt = 0;
// int iCmode;
int i;
DYNAPARM Parm[15];
RESULT rc;
if( xec )
{
iFlags = xec->dwFlags;
lpFunction = xec->lpFunc;
//TODO Params maybe explictly specified in xec!
}
// iCmode = iFlags & 0xf000; // Unsupported Mode (specifies XBase++ Function1)
iRtype = iFlags & 0x0f00; // Return type - An additional flag over XBase++
iFlags = iFlags & 0x00ff; // Calling Convention
if ( iRtype == 0 )
{
iRtype = CTYPE_UNSIGNED_LONG;
}
memset( Parm, 0, sizeof( Parm ) );
if( iArgCnt > 0)
{
for( i = iFirst; i <= iParams; i++)
{
switch ( hb_parinfo( i ) & ~HB_IT_BYREF )
{
case HB_IT_NIL :
Parm[iCnt].nWidth = sizeof( void * );
Parm[iCnt].dwArg = (DWORD) NULL;
break;
case HB_IT_POINTER :
Parm[iCnt].nWidth = sizeof( void * );
Parm[iCnt].dwArg = (DWORD) hb_parptr ( i );
break;
case HB_IT_INTEGER :
case HB_IT_LONG :
case HB_IT_DATE :
case HB_IT_LOGICAL :
Parm[iCnt].nWidth = sizeof( DWORD );
Parm[iCnt].dwArg = (DWORD) hb_parnl( i );
if( hb_parinfo( i ) & HB_IT_BYREF )
{
Parm[iCnt].pArg = &( Parm[iCnt].dwArg );
Parm[iCnt].dwFlags = DC_FLAG_ARGPTR; // use the pointer
}
break;
case HB_IT_DOUBLE :
Parm[iCnt].nWidth = sizeof( double );
Parm[iCnt].dArg = hb_parnd( i );
if( hb_parinfo( i ) & HB_IT_BYREF )
{
Parm[iCnt].nWidth = sizeof( void * );
Parm[iCnt].pArg = &( Parm[iCnt].dArg );
Parm[iCnt].dwFlags = DC_FLAG_ARGPTR; // use the pointer
}
iFlags |= DC_RETVAL_MATH8;
break;
case HB_IT_STRING :
case HB_IT_MEMO :
Parm[iCnt].nWidth = sizeof( void * );
if ( hb_parinfo( i ) & HB_IT_BYREF )
{
Parm[iCnt].pArg = malloc( hb_parclen( i ) );
memcpy( Parm[iCnt].pArg, hb_parc( i ), hb_parclen( i ) );
}
else
{
Parm[iCnt].pArg = (void *) hb_parc( i );
}
Parm[iCnt].dwFlags = DC_FLAG_ARGPTR; // use the pointer
break;
case HB_IT_ARRAY :
if( strncmp( hb_objGetClsName( hb_param(i, HB_IT_ANY ) ), "C Structure", 11 ) == 0 )
{
Parm[iCnt].nWidth = sizeof( void * );
Parm[iCnt].dwArg = (DWORD) hb_parcstruct( i );
break;
}
default:
MessageBox( GetActiveWindow(), "UNKNOWN Parameter Type!", "DLLCall Parameter Error!", MB_OK | MB_ICONERROR );
return;
}
iCnt++;
}
}
/*SetLastError(0);*/
rc = DynaCall(iFlags, lpFunction, iArgCnt, Parm, NULL, 0);
/*if( GetLastError() )
{
LPVOID lpMsgBuf;
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
MessageBox( GetActiveWindow(), (LPCSTR) lpMsgBuf, "DllExec:DynaCall() failed!", MB_OK | MB_ICONERROR );
LocalFree(lpMsgBuf);
}*/
if( iArgCnt > 0)
{
iCnt = 0;
for( i = iFirst; i <= iParams; i++)
{
if( hb_parinfo( i ) & HB_IT_BYREF )
{
switch ( hb_parinfo( i ) & ~HB_IT_BYREF )
{
case HB_IT_NIL :
hb_stornl( Parm[iCnt].dwArg, i );
break;
case HB_IT_POINTER :
break;
case HB_IT_INTEGER :
case HB_IT_LONG :
case HB_IT_DATE :
case HB_IT_LOGICAL :
hb_stornl( *(LONG *) ( Parm[iCnt].pArg ), i );
break;
case HB_IT_DOUBLE :
hb_stornd( *(double *) &( Parm[iCnt].dArg ), i );
break;
case HB_IT_STRING :
case HB_IT_MEMO :
hb_storclen( (char *) Parm[iCnt].pArg, hb_parclen( i ), i );
free( Parm[iCnt].pArg );
break;
case HB_IT_ARRAY :
if( strncmp( hb_objGetClsName( hb_param(i, HB_IT_ANY ) ), "C Structure", 11 ) == 0 )
{
hb_vmPushSymbol( pDEVALUE->pSymbol );
hb_vmPush( hb_param( i, HB_IT_ANY ) );
hb_vmSend(0);
break;
}
default:
MessageBox( GetActiveWindow(), "UNKNOWN Parameter Type!", "DLLCall Parameter Error!", MB_OK | MB_ICONERROR );
return;
}
}
iCnt++;
}
}
// return the correct value
switch ( iRtype )
{
case CTYPE_BOOL :
hb_retl( (BOOL) rc.Long );
break;
case CTYPE_VOID :
hb_retni(0);
break;
case CTYPE_CHAR :
case CTYPE_UNSIGNED_CHAR :
hb_retni ( (char) rc.Int );
break;
case CTYPE_SHORT :
case CTYPE_UNSIGNED_SHORT :
hb_retni ( (int) rc.Int );
break;
case CTYPE_INT :
hb_retni ( (int) rc.Long );
break;
case CTYPE_LONG :
hb_retnl ( (LONG) rc.Long );
break;
case CTYPE_CHAR_PTR :
case CTYPE_UNSIGNED_CHAR_PTR :
hb_retc ( (char *) rc.Long );
break;
case CTYPE_UNSIGNED_INT :
case CTYPE_UNSIGNED_LONG :
hb_retnl ( rc.Long );
break;
case CTYPE_INT_PTR :
case CTYPE_UNSIGNED_SHORT_PTR:
case CTYPE_UNSIGNED_INT_PTR :
case CTYPE_STRUCTURE_PTR :
case CTYPE_LONG_PTR :
case CTYPE_UNSIGNED_LONG_PTR :
case CTYPE_VOID_PTR :
case CTYPE_FLOAT_PTR :
case CTYPE_DOUBLE_PTR :
hb_retptr ( (void *) rc.Long );
break;
case CTYPE_FLOAT :
hb_retnd( rc.Float );
break;
case CTYPE_DOUBLE :
hb_retnd( rc.Double );
break;
default:
MessageBox( GetActiveWindow(), "Unknown return type!", "DLLCall Parameter Error!", MB_OK | MB_ICONERROR );
break;
}
}
//------------------------------------------------------------------
HB_FUNC( DLLEXECUTECALL )
{
int iParams = hb_pcount();
int iFirst = 2;
int iArgCnt = iParams - 1;
PEXECSTRUCT xec = (PEXECSTRUCT) hb_parptr(1);
if ( xec != NULL )
{
if ( xec->dwType == EXEC_DLL )
{
if ( xec->hDLL != (HINSTANCE) NULL )
{
if ( xec->lpFunc != NULL )
{
DllExec( 0, NULL, iParams, iFirst, iArgCnt, xec );
}
}
}
}
}
HB_FUNC( DLLCALL )
{
int iParams = hb_pcount();
int iFirst = 4;
int iArgCnt = iParams - 3;
int iFlags;
BOOL lUnload = FALSE;
HINSTANCE hInst;
LPVOID lpFunction;
BYTE cFuncName[MAX_PATH];
if ( ISCHAR(1) )
{
hInst = LoadLibrary( hb_parc( 1 ) );
lUnload = TRUE;
}
else
{
hInst = (HINSTANCE) hb_parnl( 1 );
}
if ( hInst == NULL || (DWORD) hInst < 32)
{
hb_ret();
return;
}
iFlags = hb_parni( 2 );
if ((lpFunction = (LPVOID) GetProcAddress( (HMODULE) hInst,
ISCHAR( 3 ) ? (LPCSTR) hb_parcx(3) :
(LPCSTR) hb_parnl(3) )) == 0 )
{
if ( ISCHAR( 3 ) )
{
// try forced ANSI flavour ?
strcpy((char *) cFuncName, hb_parc(3));
strcat((char *) cFuncName, "A");
lpFunction = (LPVOID) GetProcAddress( (HMODULE) hInst, (const char *) cFuncName);
}
}
if (lpFunction != NULL)
{
DllExec( iFlags, lpFunction, iParams, iFirst, iArgCnt, NULL );
}
if ( lUnload )
{
FreeLibrary( hInst );
}
}
//------------------------------------------------------------------
// DynaCall support comments below
//////////////////////////////////////////////////////
//
// This part used modified code of Vic McClung.
// The modifications were to separate the library
// loading and getting the procedure address
// from the actual function call.
// The parameters have been slightly re-arranged
// to allow for C-like syntax, on function
// declaration. The changes allow to load the library
// and to get the procedure addresses in advance,
// which makes it work similarly to C import libraries.
// From experience, when using dynamic libraries, loading
// the library and getting the address of the procedure
// part of using the DLL.
// Additionally the changes will allow to use standard
// xHarbour C type defines, as used with structure types,
// ande defined in cstruct.ch .
//
//
// Andrew Wos.
// 20/07/2002.
//
//
//////////////////////////////////////////////////////
/*
Copyright 2002 Vic McClung <vicmcclung@vicmcclung.com>
www - http://www.vicmcclung.com
Borland mods by ptucker@sympatico.ca
MinGW support by Phil Krylov <phil a t newstar.rinet.ru>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this software; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
As a special exception, you have permission for
additional uses of the text contained in this release of VMGUI.
The exception is that, if you link the VMGUI library with other
files to produce an executable, this does not by itself cause the
resulting executable to be covered by the GNU General Public License.
Your use of that executable is in no way restricted on account of
linking the VMGUI library code into it.
*/
//------------------------------------------------------------------
//------------------------------------------------------------------
RESULT DynaCall(int Flags, LPVOID lpFunction, int nArgs,
DYNAPARM Parm[], LPVOID pRet, int nRetSiz)
{
// Call the specified function with the given parameters. Build a
// proper stack and take care of correct return value processing.
RESULT Res = { 0 };
int i, nInd, nSize, nLoops;
DWORD dwEAX, dwEDX, dwVal, *pStack, dwStSize = 0;
BYTE *pArg;
#if defined( __MINGW32__ )
#elif defined( __BORLANDC__ ) || defined(__DMC__)
#else
DWORD *pESP;
#endif
// Reserve 256 bytes of stack space for our arguments
#if defined( __MINGW32__ )
asm volatile( "\tmovl %%esp, %0\n"
"\tsubl $0x100, %%esp\n"
: "=r" (pStack) );
#elif defined( __BORLANDC__ ) || defined(__DMC__)
pStack = (DWORD *)_ESP;
_ESP -= 0x100;
#else
_asm mov pStack, esp
_asm mov pESP, esp
_asm sub esp, 0x100
#endif
// Push args onto the stack. Every argument is aligned on a
// 4-byte boundary. We start at the rightmost argument.
for (i = 0; i < nArgs; i++)
{
nInd = (nArgs - 1) - i;
// Start at the back of the arg ptr, aligned on a DWORD
nSize = (Parm[nInd].nWidth + 3) / 4 * 4;
pArg = (BYTE *) Parm[nInd].pArg + nSize - 4;
dwStSize += (DWORD) nSize; // Count no of bytes on stack
nLoops = ( nSize / 4 ) - 1;
while( nSize > 0 )
{
// Copy argument to the stack
if( Parm[nInd].dwFlags & DC_FLAG_ARGPTR )
{
// Arg has a ptr to a variable that has the arg
dwVal = (DWORD) pArg; // Get first four bytes
pArg -= 4; // Next part of argument
}
else
{
// Arg has the real arg
dwVal = *( (DWORD *)( (BYTE *) ( &( Parm[nInd].dwArg ) ) + ( nLoops * 4 ) ) );
}
// Do push dwVal
pStack--; // ESP = ESP - 4
*pStack = dwVal; // SS:[ESP] = dwVal
nSize -= 4;
nLoops--;
}
}
if ((pRet != NULL) && ((Flags & DC_BORLAND) || (nRetSiz > 8)))
{
// Return value isn't passed through registers, memory copy
// is performed instead. Pass the pointer as hidden arg.
dwStSize += 4; // Add stack size
pStack--; // ESP = ESP - 4
*pStack = (DWORD)pRet; // SS:[ESP] = pMem
}
#if defined( __MINGW32__ )
asm volatile( "\taddl $0x100, %%esp\n" /* Restore to original position */
"\tsubl %2, %%esp\n" /* Adjust for our new parameters */
/* Stack is now properly built, we can call the function */
"\tcall *%3\n"
: "=a" (dwEAX), "=d" (dwEDX) /* Save eax/edx registers */
: "r" (dwStSize), "r" (lpFunction) );
/* Possibly adjust stack and read return values. */
if (Flags & DC_CALL_CDECL)
{
asm volatile( "\taddl %0, %%esp\n" : : "r" (dwStSize) );
}
if (Flags & DC_RETVAL_MATH4)
{
asm volatile( "\tfstps (%0)\n" : "=r" (Res) );
}
else if (Flags & DC_RETVAL_MATH8)
{
asm volatile( "\tfstpl (%0)\n" : "=r" (Res) );
}
else if (pRet == NULL)
{
Res.Int = dwEAX;
(&Res.Int)[1] = dwEDX;
}
else if (((Flags & DC_BORLAND) == 0) && (nRetSiz <= 8))
{
/* Microsoft optimized less than 8-bytes structure passing */
((int *)pRet)[0] = dwEAX;
((int *)pRet)[1] = dwEDX;
}
#elif defined( __BORLANDC__ ) || defined(__DMC__)
_ESP += (0x100 - dwStSize);
_EDX = (DWORD) &lpFunction;
__emit__(0xff,0x12); // call [edx];
dwEAX = _EAX;
dwEDX = _EDX;
// Possibly adjust stack and read return values.
if (Flags & DC_CALL_CDECL)
{
_ESP += dwStSize;
}
if (Flags & DC_RETVAL_MATH4)
{
_EBX = (DWORD) &Res;
_EAX = dwEAX;
_EDX = dwEDX;
__emit__(0xd9,0x1b); // _asm fnstp float ptr [ebx]
}
else if (Flags & DC_RETVAL_MATH8)
{
_EBX = (DWORD) &Res;
_EAX = dwEAX;
_EDX = dwEDX;
__emit__(0xdd,0x1b); // _asm fnstp qword ptr [ebx]
}
else if (pRet == NULL)
{
_EBX = (DWORD) &Res;
_EAX = dwEAX;
_EDX = dwEDX;
// _asm mov DWORD PTR [ebx], eax
// _asm mov DWORD PTR [ebx + 4], edx
__emit__(0x89,0x03,0x89,0x53,0x04);
}
else if (((Flags & DC_BORLAND) == 0) && (nRetSiz <= 8))
{
_EBX = (DWORD) pRet;
_EAX = dwEAX;
_EDX = dwEDX;
// _asm mov DWORD PTR [ebx], eax
// _asm mov DWORD PTR [ebx + 4], edx
__emit__(0x89,0x03,0x89,0x53,0x04);
}
#else
_asm add esp, 0x100 // Restore to original position
_asm sub esp, dwStSize // Adjust for our new parameters
// Stack is now properly built, we can call the function
_asm call [lpFunction]
_asm mov dwEAX, eax // Save eax/edx registers
_asm mov dwEDX, edx //
// Possibly adjust stack and read return values.
if (Flags & DC_CALL_CDECL)
{
_asm add esp, dwStSize
}
if (Flags & DC_RETVAL_MATH4)
{
_asm fstp dword ptr [Res]
}
else if (Flags & DC_RETVAL_MATH8)
{
_asm fstp qword ptr [Res]
}
else if (pRet == NULL)
{
_asm mov eax, [dwEAX]
_asm mov DWORD PTR [Res], eax
_asm mov edx, [dwEDX]
_asm mov DWORD PTR [Res + 4], edx
}
else if (((Flags & DC_BORLAND) == 0) && (nRetSiz <= 8))
{
// Microsoft optimized less than 8-bytes structure passing
_asm mov ecx, DWORD PTR [pRet]
_asm mov eax, [dwEAX]
_asm mov DWORD PTR [ecx], eax
_asm mov edx, [dwEDX]
_asm mov DWORD PTR [ecx + 4], edx
}
_asm mov esp, pESP
#endif
return Res;
}
//
// Call a DLL function from (x)Harbour, the first parameter is a pointer returned from
// GetProcAddress above. Note that it is hardcoded to use PASCAL calling convention.
//
HB_FUNC( CALLDLL )
{
int iParams = hb_pcount();
int iFirst = 2;
int iArgCnt = iParams - 1;
LPVOID lpFunction;
lpFunction = (LPVOID) hb_parptr( 1 );
if (lpFunction != NULL)
{
DllExec( DC_CALL_STD, lpFunction, iParams, iFirst, iArgCnt, NULL );
}
}
#endif /* HB_OS_WIN32 */
Abs.
Enviado: 25 Out 2013 14:17