Line data    Source code

       1             : /******************************************************************************
       2             :  * $Id$
       3             :  *
       4             :  * Project:  PDF driver
       5             :  * Purpose:  GDALDataset driver for PDF dataset.
       6             :  * Author:   Even Rouault, <even dot rouault at spatialys.com>
       7             :  *
       8             :  ******************************************************************************
       9             :  * Copyright (c) 2010-2013, Even Rouault <even dot rouault at spatialys.com>
      10             :  *
      11             :  * SPDX-License-Identifier: MIT
      12             :  ****************************************************************************/
      13             : 
      14             : #ifndef PDFIO_H_INCLUDED
      15             : #define PDFIO_H_INCLUDED
      16             : 
      17             : #include "cpl_vsi_virtual.h"
      18             : 
      19             : /************************************************************************/
      20             : /*                         VSIPDFFileStream                             */
      21             : /************************************************************************/
      22             : 
      23             : #define BUFFER_SIZE 1024
      24             : 
      25             : class VSIPDFFileStream final : public BaseStream
      26             : {
      27             :   public:
      28             :     VSIPDFFileStream(VSILFILE *f, const char *pszFilename, Object &&dictA);
      29             :     VSIPDFFileStream(VSIPDFFileStream *poParent, vsi_l_offset startA,
      30             :                      bool limitedA, vsi_l_offset lengthA, Object &&dictA);
      31             :     virtual ~VSIPDFFileStream();
      32             : 
      33             :     virtual BaseStream *copy() override;
      34             : 
      35             :     virtual Stream *makeSubStream(Goffset startA, bool limitedA,
      36             :                                   Goffset lengthA, Object &&dictA) override;
      37             :     virtual Goffset getPos() override;
      38             :     virtual Goffset getStart() override;
      39             : 
      40             :     virtual void setPos(Goffset pos, int dir = 0) override;
      41             :     virtual void moveStart(Goffset delta) override;
      42             : 
      43             :     virtual StreamKind getKind() const override;
      44             : 
      45             :     virtual GooString *getFileName() override;
      46             : 
      47             :     virtual int getChar() override;
      48             :     virtual int getUnfilteredChar() override;
      49             :     virtual int lookChar() override;
      50             : 
      51             :     virtual void reset() override;
      52             :     virtual void unfilteredReset() override;
      53             :     virtual void close() override;
      54             : 
      55           0 :     bool FoundLinearizedHint() const
      56             :     {
      57           0 :         return bFoundLinearizedHint;
      58             :     }
      59             : 
      60             :   private:
      61             :     virtual bool hasGetChars() override;
      62             :     virtual int getChars(int nChars, unsigned char *buffer) override;
      63             : 
      64             :     VSIPDFFileStream *poParent = nullptr;
      65             :     GooString *poFilename = nullptr;
      66             :     VSILFILE *f = nullptr;
      67             :     vsi_l_offset nStart = 0;
      68             :     bool bLimited = false;
      69             :     vsi_l_offset nLength = 0;
      70             : 
      71             :     vsi_l_offset nCurrentPos = VSI_L_OFFSET_MAX;
      72             :     int bHasSavedPos = FALSE;
      73             :     vsi_l_offset nSavedPos = 0;
      74             : 
      75             :     GByte abyBuffer[BUFFER_SIZE];
      76             :     int nPosInBuffer = -1;
      77             :     int nBufferLength = -1;
      78             : 
      79             :     bool bFoundLinearizedHint = false;
      80             : 
      81             :     int FillBuffer();
      82             : 
      83             :     CPL_DISALLOW_COPY_ASSIGN(VSIPDFFileStream)
      84             : };
      85             : 
      86             : #endif  // PDFIO_H_INCLUDED