src/tiff/contrib/stream/tiffstream.h

   1 // tiff stream interface class definition
   2
   3 #ifndef _TIFF_STREAM_H_
   4 #define _TIFF_STREAM_H_
   5
   6 #include <iostream.h>
   7
   8 #include "tiffio.h"
   9
  10 class TiffStream {
  11
  12 public:
  13     // ctor/dtor
  14     TiffStream();
  15         ~TiffStream();
  16
  17 public:
  18     enum SeekDir {
  19             beg,
  20                 cur,
  21                 end,
  22     };
  23
  24 public:
  25     // factory methods
  26     TIFF* makeFileStream(iostream* str);
  27         TIFF* makeFileStream(istream* str);
  28         TIFF* makeFileStream(ostream* str);
  29
  30 public:
  31     // tiff client methods
  32         static tsize_t read(thandle_t fd, tdata_t buf, tsize_t size);
  33         static tsize_t write(thandle_t fd, tdata_t buf, tsize_t size);
  34         static toff_t seek(thandle_t fd, toff_t offset, int origin);
  35         static toff_t size(thandle_t fd);
  36         static int close(thandle_t fd);
  37         static int map(thandle_t fd, tdata_t* phase, toff_t* psize);
  38         static void unmap(thandle_t fd, tdata_t base, tsize_t size);
  39
  40 public:
  41     // query method
  42         TIFF* getTiffHandle() const { return m_tif; }
  43         unsigned int getStreamLength() { return m_streamLength; }
  44
  45 private:
  46         // internal methods
  47     unsigned int getSize(thandle_t fd);
  48         unsigned int tell(thandle_t fd);
  49         bool seekInt(thandle_t fd, unsigned int offset, int origin);
  50         bool isOpen(thandle_t fd);
  51
  52 private:
  53         thandle_t m_this;
  54         TIFF* m_tif;
  55         static const char* m_name;
  56         istream* m_inStream;
  57         ostream* m_outStream;
  58         iostream* m_ioStream;
  59         int m_streamLength;
  60
  61 };
  62
  63 #endif // _TIFF_STREAM_H_