81c9b0506c
* contrib/*
* Deleted 'www.' from harbour-project.org website name.
(www.harbour-project.org -> harbour-project.org)
274 lines
7.0 KiB
Plaintext
274 lines
7.0 KiB
Plaintext
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
* xhb stream classes
|
|
*
|
|
* Copyright 2009 {list of individual authors and e-mail addresses}
|
|
* www - http://harbour-project.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.
|
|
*
|
|
*/
|
|
|
|
#include "hbclass.ch"
|
|
|
|
#include "common.ch"
|
|
#include "fileio.ch"
|
|
|
|
#xtranslate THROW(<oErr>) => (Eval(ErrorBlock(), <oErr>), Break(<oErr>))
|
|
|
|
#define BUFFER_SIZE 16384
|
|
|
|
FUNCTION FileReader( cFile, nMode )
|
|
RETURN TStreamFileReader():New( cFile, nMode )
|
|
|
|
FUNCTION FileWriter( cFile, nMode )
|
|
RETURN TStreamFileWriter():New( cFile, nMode )
|
|
|
|
CREATE CLASS TStream
|
|
|
|
VAR lCanRead INIT .F.
|
|
VAR lCanWrite INIT .F.
|
|
VAR lCanSeek INIT .F.
|
|
|
|
VAR nLength INIT 0
|
|
VAR nPosition INIT 0
|
|
|
|
//METHOD BeginRead( sBuffer, nOffset, nCount, bCallback, oState )
|
|
//METHOD EndRead( oAsync ) VIRTUAL
|
|
|
|
//METHOD BeginWrite( sBuffer, nOffset, nCount, bCallback, oState )
|
|
//METHOD EndWrite( oAsync ) VIRTUAL
|
|
|
|
METHOD Close() VIRTUAL
|
|
METHOD Flush() VIRTUAL
|
|
METHOD Seek( nOffset, Origin ) VIRTUAL
|
|
|
|
METHOD Read( sBuffer, nOffset, nCount ) VIRTUAL
|
|
METHOD ReadByte() VIRTUAL
|
|
|
|
METHOD Write( sBuffer, nOffset, nCount ) VIRTUAL
|
|
METHOD WriteByte() VIRTUAL
|
|
|
|
METHOD CopyTo( oTargetStream )
|
|
|
|
ENDCLASS
|
|
|
|
METHOD PROCEDURE CopyTo( oTargetStream ) CLASS TStream
|
|
|
|
LOCAL nBytesToRead := ::nLength
|
|
LOCAL sBuffer := Space( BUFFER_SIZE )
|
|
LOCAL nRead
|
|
LOCAL nPosition
|
|
|
|
IF oTargetStream:lCanWrite == .F.
|
|
Throw( ErrorNew( "Stream", 0, 1001, ProcName(), "Target not writable.", HB_aParams() ) )
|
|
ENDIF
|
|
|
|
// Save.
|
|
nPosition := ::nPosition
|
|
|
|
::Seek( 0, FS_SET )
|
|
oTargetStream:Seek( 0, FS_SET )
|
|
|
|
DO WHILE nBytesToRead > 0
|
|
nRead := ::Read( @sBuffer, 0, BUFFER_SIZE )
|
|
oTargetStream:Write( sBuffer, 0, nRead )
|
|
nBytesToRead -= nRead
|
|
ENDDO
|
|
|
|
//Truncate incase it was a bigger file.
|
|
oTargetStream:Write( "", 0, 0 )
|
|
|
|
// Restore.
|
|
::Seek( nPosition, FS_SET )
|
|
|
|
RETURN
|
|
|
|
CREATE CLASS TStreamFileReader FROM TStream
|
|
|
|
VAR cFile
|
|
VAR Handle
|
|
|
|
METHOD New( cFile, nMode ) CONSTRUCTOR
|
|
|
|
METHOD Close() INLINE IIF( ::Handle > 0, FClose( ::Handle ), ), ::Handle := -2
|
|
METHOD Seek( nOffset Origin ) INLINE FSeek( ::Handle, nOffset, Origin )
|
|
|
|
METHOD Read( sBuffer, nOffset, nCount )
|
|
METHOD ReadByte()
|
|
|
|
DESTRUCTOR Finalize
|
|
|
|
ENDCLASS
|
|
|
|
METHOD New( cFile, nMode ) CLASS TStreamFileReader
|
|
|
|
::lCanRead := .T.
|
|
|
|
::cFile := cFile
|
|
|
|
IF nMode == NIL
|
|
nMode := 2
|
|
ENDIF
|
|
|
|
::Handle := FOpen( cFile, nMode )
|
|
IF ::Handle <= 0
|
|
Throw( ErrorNew( "Stream", 0, 1004, ProcName(), "Open Error: " + Str( FError() ), HB_aParams() ) )
|
|
ENDIF
|
|
|
|
::nPosition := 0
|
|
::nLength := FSeek( ::Handle, 0, FS_END )
|
|
|
|
FSeek( ::Handle, 0, FS_SET )
|
|
|
|
RETURN Self
|
|
|
|
METHOD PROCEDURE Finalize CLASS TStreamFileReader
|
|
::Close()
|
|
RETURN
|
|
|
|
METHOD Read( sBuffer, nOffset, nCount ) CLASS TStreamFileReader
|
|
|
|
LOCAL nRead
|
|
|
|
/*
|
|
IF ! HB_IsByRef( @sBuffer )
|
|
Throw( ErrorNew( "Stream", 0, 1002, ProcName(), "Buffer not BYREF.", HB_aParams() ) )
|
|
ENDIF
|
|
*/
|
|
|
|
nRead := FRead( ::Handle, @sBuffer, nCount, nOffset )
|
|
|
|
::nPosition += nRead
|
|
|
|
RETURN nRead
|
|
|
|
METHOD ReadByte() CLASS TStreamFileReader
|
|
|
|
LOCAL sBuffer := " "
|
|
|
|
IF FRead( ::Handle, @sBuffer, 1 ) == 1
|
|
::nPosition++
|
|
RETURN sBuffer
|
|
ENDIF
|
|
|
|
RETURN ""
|
|
|
|
CREATE CLASS TStreamFileWriter FROM TStream
|
|
|
|
VAR cFile
|
|
VAR Handle
|
|
|
|
METHOD New( cFile, nMode ) CONSTRUCTOR
|
|
|
|
METHOD Close() INLINE IIF( ::Handle > 0, FClose( ::Handle ), ), ::Handle := -2
|
|
METHOD Seek( nOffset Origin ) INLINE ::nPosition := FSeek( ::Handle, nOffset, Origin )
|
|
|
|
METHOD Write( sBuffer, nOffset, nCount )
|
|
METHOD WriteByte( cByte )
|
|
|
|
DESTRUCTOR Finalize
|
|
|
|
ENDCLASS
|
|
|
|
METHOD New( cFile, nMode ) CLASS TStreamFileWriter
|
|
|
|
::lCanWrite := .T.
|
|
|
|
::cFile := cFile
|
|
|
|
IF hb_FileExists( cFile )
|
|
DEFAULT nMode TO FO_READWRITE
|
|
|
|
::Handle := FOpen( cFile, nMode )
|
|
IF ::Handle <= 0
|
|
Throw( ErrorNew( "Stream", 0, 1004, ProcName(), "Open Error: " + Str( FError() ), HB_aParams() ) )
|
|
ENDIF
|
|
|
|
::nLength := FSeek( ::Handle, 0, FS_END )
|
|
::nPosition := ::nLength
|
|
ELSE
|
|
DEFAULT nMode TO FC_NORMAL
|
|
|
|
::Handle := FCreate( cFile, nMode )
|
|
IF ::Handle <= 0
|
|
Throw( ErrorNew( "Stream", 0, 1004, ProcName(), "Create Error: " + Str( FError() ), HB_aParams() ) )
|
|
ENDIF
|
|
|
|
::nPosition := 0
|
|
::nLength := 0
|
|
ENDIF
|
|
|
|
RETURN Self
|
|
|
|
METHOD PROCEDURE Finalize CLASS TStreamFileWriter
|
|
::Close()
|
|
RETURN
|
|
|
|
METHOD Write( sBuffer, nOffset, nCount ) CLASS TStreamFileWriter
|
|
|
|
LOCAL nWritten
|
|
|
|
nWritten := FWrite( ::Handle, sBuffer, nCount, nOffset )
|
|
|
|
::nPosition += nWritten
|
|
|
|
IF nWritten != nCount
|
|
Throw( ErrorNew( "Stream", 0, 1003, ProcName(), "Write failed - written:" + Str( nWritten ) + " bytes", HB_aParams() ) )
|
|
ENDIF
|
|
|
|
RETURN nWritten
|
|
|
|
METHOD PROCEDURE WriteByte( cByte ) CLASS TStreamFileWriter
|
|
|
|
LOCAL nWritten := FWrite( ::Handle, cByte, 1 )
|
|
|
|
::nPosition += nWritten
|
|
|
|
IF nWritten != 1
|
|
Throw( ErrorNew( "Stream", 0, 1006, ProcName(), "Write failed", HB_aParams() ) )
|
|
ENDIF
|
|
|
|
RETURN
|