332 lines
11 KiB
C
332 lines
11 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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* DISKSPACE() 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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/* NOTE: DISKSPACE() supports larger disks than 2GB. CA-Cl*pper will always
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return a (long) value, Harbour may return a (double) for large
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values, the decimal places are always set to zero, though. */
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/* NOTE: For OS/2. Must be ahead of any and all #include statements */
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#define INCL_BASE
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#define INCL_DOSERRORS
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#define HB_OS_WIN_32_USED
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#include "hbapi.h"
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#include "hbapierr.h"
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#include "hbapifs.h"
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/* NOTE: The second parameter is a Harbour extension, check fileio.ch for
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the possible values. */
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HB_FUNC( DISKSPACE )
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{
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USHORT uiDrive = ISNUM( 1 ) ? hb_parni( 1 ) : 0;
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USHORT uiType = ISNUM( 2 ) ? hb_parni( 2 ) : HB_DISK_AVAIL;
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double dSpace = 0.0;
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if( uiType > HB_DISK_TOTAL )
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uiType = HB_DISK_TOTAL;
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#if defined(HB_OS_DOS)
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{
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while( TRUE )
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{
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union REGS regs;
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regs.x.dx = uiDrive;
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regs.h.ah = 0x36;
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HB_DOS_INT86( 0x21, ®s, ®s );
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if( regs.x.ax != 0xFFFF )
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{
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USHORT uiClusterTotal = regs.x.dx;
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USHORT uiClusterFree = regs.x.bx;
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USHORT uiSecPerCluster = regs.x.ax;
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USHORT uiSectorSize = regs.x.cx;
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switch( uiType )
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{
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case HB_DISK_AVAIL:
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case HB_DISK_FREE:
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dSpace = ( double ) uiClusterFree *
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( double ) uiSecPerCluster *
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( double ) uiSectorSize;
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break;
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case HB_DISK_USED:
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case HB_DISK_TOTAL:
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dSpace = ( double ) uiClusterTotal *
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( double ) uiSecPerCluster *
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( double ) uiSectorSize;
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if( uiType == HB_DISK_USED )
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dSpace -= ( double ) uiClusterFree *
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( double ) uiSecPerCluster *
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( double ) uiSectorSize;
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break;
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}
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}
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else
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{
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USHORT uiAction = hb_errRT_BASE_Ext1( EG_OPEN, 2018, NULL, NULL, 0, EF_CANDEFAULT );
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/* NOTE: Under 'Standard' behaviour, this error does not allow 'retry'
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but if you should wish to make it so, then or EF_CANRETRY
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with EF_CANDEFAULT above)
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*/
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if( uiAction == E_RETRY )
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continue;
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}
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break;
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}
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}
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#elif defined(HB_OS_WIN_32)
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{
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while( TRUE )
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{
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typedef BOOL (WINAPI *P_GDFSE)(LPCTSTR, PULARGE_INTEGER,
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PULARGE_INTEGER, PULARGE_INTEGER);
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char szPath[ 4 ];
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P_GDFSE pGetDiskFreeSpaceEx;
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UINT uiErrMode;
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/* Get the default drive */
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if( uiDrive == 0 )
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{
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USHORT uiErrorOld = hb_fsError();
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uiDrive = hb_fsCurDrv() + 1;
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hb_fsSetError( uiErrorOld );
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}
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szPath[ 0 ] = uiDrive + 'A' - 1;
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szPath[ 1 ] = ':';
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szPath[ 2 ] = '\\';
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szPath[ 3 ] = '\0';
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uiErrMode = SetErrorMode( SEM_FAILCRITICALERRORS );
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SetLastError( 0 );
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pGetDiskFreeSpaceEx = ( P_GDFSE ) GetProcAddress( GetModuleHandle( "kernel32.dll" ),
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"GetDiskFreeSpaceExA");
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if( pGetDiskFreeSpaceEx )
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{
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ULARGE_INTEGER i64FreeBytesToCaller,
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i64TotalBytes,
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i64FreeBytes,
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i64RetVal;
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if( pGetDiskFreeSpaceEx( szPath,
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( PULARGE_INTEGER ) &i64FreeBytesToCaller,
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( PULARGE_INTEGER ) &i64TotalBytes,
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( PULARGE_INTEGER ) &i64FreeBytes ) )
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{
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switch( uiType )
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{
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case HB_DISK_AVAIL:
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memcpy( &i64RetVal, &i64FreeBytesToCaller, sizeof( ULARGE_INTEGER ) );
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break;
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case HB_DISK_FREE:
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memcpy( &i64RetVal, &i64FreeBytes, sizeof( ULARGE_INTEGER ) );
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break;
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case HB_DISK_USED:
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case HB_DISK_TOTAL:
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memcpy( &i64RetVal, &i64TotalBytes, sizeof( ULARGE_INTEGER ) );
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}
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#if (defined(__GNUC__) || defined(_MSC_VER)) && !defined(__RSXNT__)
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dSpace = ( double ) i64RetVal.LowPart +
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( double ) i64RetVal.HighPart +
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( double ) i64RetVal.HighPart *
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( double ) 0xFFFFFFFF;
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if( uiType == HB_DISK_USED )
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{
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dSpace -= ( double ) i64FreeBytes.LowPart +
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( double ) i64FreeBytes.HighPart +
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( double ) i64FreeBytes.HighPart *
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( double ) 0xFFFFFFFF;
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}
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#else
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/* NOTE: Borland doesn't seem to deal with the un-named
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struct that is part of ULARGE_INTEGER
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[pt] */
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dSpace = ( double ) i64RetVal.u.LowPart +
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( double ) i64RetVal.u.HighPart +
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( double ) i64RetVal.u.HighPart *
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( double ) 0xFFFFFFFF;
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if( uiType == HB_DISK_USED )
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{
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dSpace -= ( double ) i64FreeBytes.u.LowPart +
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( double ) i64FreeBytes.u.HighPart +
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( double ) i64FreeBytes.u.HighPart *
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( double ) 0xFFFFFFFF;
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}
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#endif
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}
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}
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else
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{
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DWORD dwSectorsPerCluster;
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DWORD dwBytesPerSector;
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DWORD dwNumberOfFreeClusters;
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DWORD dwTotalNumberOfClusters;
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SetLastError( 0 );
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if( GetDiskFreeSpace( szPath,
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&dwSectorsPerCluster,
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&dwBytesPerSector,
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&dwNumberOfFreeClusters,
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&dwTotalNumberOfClusters ) )
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{
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switch( uiType )
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{
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case HB_DISK_AVAIL:
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case HB_DISK_FREE:
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dSpace = ( double ) dwNumberOfFreeClusters *
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( double ) dwSectorsPerCluster *
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( double ) dwBytesPerSector;
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break;
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case HB_DISK_USED:
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case HB_DISK_TOTAL:
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dSpace = ( double ) dwTotalNumberOfClusters *
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( double ) dwSectorsPerCluster *
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( double ) dwBytesPerSector;
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if( uiType == HB_DISK_USED )
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dSpace -= ( double ) dwNumberOfFreeClusters *
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( double ) dwSectorsPerCluster *
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( double ) dwBytesPerSector;
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break;
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}
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}
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}
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SetErrorMode( uiErrMode );
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if( GetLastError() != 0 )
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{
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USHORT uiAction = hb_errRT_BASE_Ext1( EG_OPEN, 2018, NULL, NULL, 0, EF_CANDEFAULT );
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/* NOTE: Under 'Standard' behaviour, this error does not allow 'retry'
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but if you should wish to make it so, then or EF_CANRETRY
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with EF_CANDEFAULT above)
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*/
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if( uiAction == E_RETRY )
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continue;
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}
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break;
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}
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}
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#elif defined(HB_OS_OS2)
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{
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struct _FSALLOCATE fsa;
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USHORT rc;
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/* Query level 1 info from filesystem */
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while( ( rc = DosQueryFSInfo( uiDrive, 1, &fsa, sizeof( fsa ) ) ) != 0 )
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{
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USHORT uiAction = hb_errRT_BASE_Ext1( EG_OPEN, 2018, NULL, NULL, 0, EF_CANDEFAULT );
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/* NOTE: Under 'Standard' behaviour, this error does not allow 'retry'
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but if you should wish to make it so, then or EF_CANRETRY with
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EF_CANDEFAULT above)
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*/
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if( uiAction != E_RETRY )
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break;
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}
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if( rc == 0 )
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{
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switch( uiType )
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{
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case HB_DISK_AVAIL:
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case HB_DISK_FREE:
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dSpace = ( double ) fsa.cUnitAvail *
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( double ) fsa.cSectorUnit *
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( double ) fsa.cbSector;
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break;
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case HB_DISK_USED:
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case HB_DISK_TOTAL:
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dSpace = ( double ) fsa.cUnit *
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( double ) fsa.cSectorUnit *
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( double ) fsa.cbSector;
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if( uiType == HB_DISK_USED )
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dSpace -= ( double ) fsa.cUnitAvail *
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( double ) fsa.cSectorUnit *
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( double ) fsa.cbSector;
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break;
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}
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}
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}
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#else
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{
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HB_SYMBOL_UNUSED( uiDrive );
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HB_SYMBOL_UNUSED( uiType );
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}
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#endif
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hb_retnlen( dSpace, -1, 0 );
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}
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