92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* ISPRINTER() function
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*
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* Copyright 1999 Victor Szakats <info@szelvesz.hu>
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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#define HB_OS_WIN_32_USED
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#include "hbapi.h"
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#include "hbapifs.h"
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/* NOTE: The parameter is an extension over CA-Cl*pper, it's also supported
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by Xbase++. [vszakats] */
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HB_FUNC( ISPRINTER )
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{
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char * pszDOSPort = ( ISCHAR( 1 ) && hb_parclen( 1 ) >= 4 ) ? hb_parc( 1 ) : "LPT1";
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USHORT uiPort = atoi( pszDOSPort + 3 );
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BOOL bIsPrinter = FALSE;
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#if defined(HB_OS_DOS)
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/* NOTE: DOS specific solution, using BIOS interrupt */
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if( hb_strnicmp( pszDOSPort, "LPT", 3 ) == 0 && uiPort > 0 )
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{
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union REGS regs;
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regs.h.ah = 2;
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regs.HB_XREGS.dx = uiPort - 1;
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HB_DOS_INT86( 0x17, ®s, ®s );
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bIsPrinter = ( regs.h.ah == 0x90 );
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}
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else if( hb_strnicmp( pszDOSPort, "COM", 3 ) == 0 && uiPort > 0 )
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{
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/* TODO: Proper COM port checking */
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bIsPrinter = TRUE;
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}
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#else
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/* NOTE: Platform independent method, at least it will compile and run
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on any platform, but the result may not be the expected one,
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since Unix/Linux doesn't support LPT/COM by nature, other OSs
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may not reflect the actual physical presence of the printer when
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trying to open it, since we are talking to the spooler.
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[vszakats] */
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if( ( hb_strnicmp( pszDOSPort, "LPT", 3 ) == 0 ||
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hb_strnicmp( pszDOSPort, "COM", 3 ) == 0 ) && uiPort > 0 )
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{
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FHANDLE fhnd = hb_fsOpen( ( BYTE * ) pszDOSPort, FO_WRITE | FO_SHARED | FO_PRIVATE );
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bIsPrinter = ( fhnd != FS_ERROR );
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hb_fsClose( fhnd );
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}
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#endif
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hb_retl( bIsPrinter );
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}
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