dcmdata/include/dcmtk/dcmdata/dcostrma.h

00001 /*
00002  *
00003  *  Copyright (C) 1994-2010, OFFIS e.V.
00004  *  All rights reserved.  See COPYRIGHT file for details.
00005  *
00006  *  This software and supporting documentation were developed by
00007  *
00008  *    OFFIS e.V.
00009  *    R&D Division Health
00010  *    Escherweg 2
00011  *    D-26121 Oldenburg, Germany
00012  *
00013  *
00014  *  Module:  dcmdata
00015  *
00016  *  Author:  Marco Eichelberg
00017  *
00018  *  Purpose: base classes for output streams
00019  *
00020  *  Last Update:      $Author: joergr $
00021  *  Update Date:      $Date: 2010-10-14 13:15:41 $
00022  *  CVS/RCS Revision: $Revision: 1.5 $
00023  *  Status:           $State: Exp $
00024  *
00025  *  CVS/RCS Log at end of file
00026  *
00027  */
00028 
00029 #ifndef DCOSTRMA_H
00030 #define DCOSTRMA_H
00031 
00032 #include "dcmtk/config/osconfig.h"
00033 #include "dcmtk/ofstd/oftypes.h"  /* for OFBool */
00034 #include "dcmtk/ofstd/ofcond.h"   /* for OFCondition */
00035 #include "dcmtk/dcmdata/dcxfer.h"   /* for E_StreamCompression */
00036 #include "dcmtk/ofstd/offile.h"   /* for offile_off_t */
00037 
00041 class DcmConsumer
00042 {
00043 public:
00044 
00046   virtual ~DcmConsumer()
00047   {
00048   }
00049 
00054   virtual OFBool good() const = 0;
00055 
00060   virtual OFCondition status() const = 0;
00061 
00067   virtual OFBool isFlushed() const = 0;
00068 
00076   virtual offile_off_t avail() const = 0;
00077 
00083   virtual offile_off_t write(const void *buf, offile_off_t buflen) = 0;
00084 
00090   virtual void flush() = 0;
00091 };
00092 
00093 
00097 class DcmOutputFilter: public DcmConsumer
00098 {
00099 public:
00100 
00102   virtual ~DcmOutputFilter()
00103   {
00104   }
00105 
00112   virtual void append(DcmConsumer& consumer) = 0;
00113 };
00114 
00115 
00119 class DcmOutputStream
00120 {
00121 public:
00122 
00124   virtual ~DcmOutputStream();
00125 
00130   virtual OFBool good() const;
00131 
00136   virtual OFCondition status() const;
00137 
00143   virtual OFBool isFlushed() const;
00144 
00152   virtual offile_off_t avail() const;
00153 
00159   virtual offile_off_t write(const void *buf, offile_off_t buflen);
00160 
00166   virtual void flush();
00167 
00171   virtual offile_off_t tell() const;
00172 
00180   virtual OFCondition installCompressionFilter(E_StreamCompression filterType);
00181 
00182 protected:
00183 
00190   DcmOutputStream(DcmConsumer *initial);
00191 
00192 private:
00193 
00195   DcmOutputStream(const DcmOutputStream&);
00196 
00198   DcmOutputStream& operator=(const DcmOutputStream&);
00199 
00201   DcmConsumer *current_;
00202 
00204   DcmOutputFilter *compressionFilter_;
00205 
00207   offile_off_t tell_;
00208 };
00209 
00210 
00211 
00212 #endif
00213 
00214 /*
00215  * CVS/RCS Log:
00216  * $Log: dcostrma.h,v $
00217  * Revision 1.5  2010-10-14 13:15:41  joergr
00218  * Updated copyright header. Added reference to COPYRIGHT file.
00219  *
00220  * Revision 1.4  2009-11-04 09:58:07  uli
00221  * Switched to logging mechanism provided by the "new" oflog module
00222  *
00223  * Revision 1.3  2007-02-19 16:06:09  meichel
00224  * Class DcmOutputStream and related classes are now safe for use with
00225  *   large files (2 GBytes or more) if supported by compiler and operating system.
00226  *
00227  * Revision 1.2  2005/12/08 16:28:24  meichel
00228  * Changed include path schema for all DCMTK header files
00229  *
00230  * Revision 1.1  2002/08/27 16:55:36  meichel
00231  * Initial release of new DICOM I/O stream classes that add support for stream
00232  *   compression (deflated little endian explicit VR transfer syntax)
00233  *
00234  *
00235  */


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