err.no Git - sope/blob - sope-core/NGStreams/NGStreams/NGFilterStream.h

   1 /*
   2   Copyright (C) 2000-2004 SKYRIX Software AG
   3
   4   This file is part of OGo
   5
   6   OGo is free software; you can redistribute it and/or modify it under
   7   the terms of the GNU Lesser General Public License as published by the
   8   Free Software Foundation; either version 2, or (at your option) any
   9   later version.
  10
  11   OGo is distributed in the hope that it will be useful, but WITHOUT ANY
  12   WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  14   License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with OGo; see the file COPYING.  If not, write to the
  18   Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19   02111-1307, USA.
  20 */
  21 // $Id$
  22
  23 #ifndef __NGStreams_NGFilterStream_H__
  24 #define __NGStreams_NGFilterStream_H__
  25
  26 #include <NGStreams/NGStream.h>
  27
  28 @interface NGFilterStream : NGStream
  29 {
  30 @protected
  31   id                  source;
  32   NGIOReadMethodType  readBytes;
  33   NGIOWriteMethodType writeBytes;
  34 }
  35
  36 + (id)filterWithInputSource:(id<NGInputStream>)_source;
  37 + (id)filterWithOutputSource:(id<NGOutputStream>)_source;
  38 + (id)filterWithSource:(id<NGStream>)_source;
  39 - (id)initWithInputSource:(id<NGInputStream>)_source;
  40 - (id)initWithOutputSource:(id<NGOutputStream>)_source;
  41 - (id)initWithSource:(id<NGStream>)_source;
  42
  43 /* accessors */
  44
  45 - (id<NGInputStream>)inputStream;
  46 - (id<NGOutputStream>)outputStream;
  47 - (id<NGStream>)source;
  48
  49 /* primitives */
  50
  51 - (unsigned)readBytes:(void *)_buf count:(unsigned)_len;
  52 - (unsigned)writeBytes:(const void *)_buf count:(unsigned)_len;
  53 - (BOOL)flush;
  54 - (BOOL)close;
  55
  56 - (NGStreamMode)mode;
  57 - (BOOL)isRootStream;
  58
  59 @end
  60
  61 #endif /* __NGStreams_NGFilterStream_H__ */