include/wx/gzstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gzstream.h
   3 // Purpose:     Streams for Gzip files
   4 // Author:      Mike Wetherell
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 2003 Mike Wetherell
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_GZSTREAM_H__
  11 #define _WX_GZSTREAM_H__
  12
  13 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  14 #pragma interface "gzstream.h"
  15 #endif
  16
  17 #include "wx/defs.h"
  18
  19 #if wxUSE_STREAMS && wxUSE_GZSTREAM && wxUSE_ZLIB
  20
  21 #include "wx/datetime.h"
  22
  23
  24 /////////////////////////////////////////////////////////////////////////////
  25 // wxGzipInputStream
  26
  27 class WXDLLIMPEXP_BASE wxGzipInputStream : public wxFilterInputStream
  28 {
  29 public:
  30     wxGzipInputStream(wxInputStream& stream, wxMBConv& conv = wxConvFile);
  31     virtual ~wxGzipInputStream();
  32
  33     wxString GetName() const { return m_name; }
  34
  35 #if wxUSE_DATETIME
  36     wxDateTime GetDateTime() const { return m_datetime; }
  37 #endif
  38
  39     virtual char Peek() { return wxInputStream::Peek(); }
  40     virtual size_t GetSize() const { return m_decomp ? m_decomp->GetSize() : 0; }
  41
  42 protected:
  43     virtual size_t OnSysRead(void *buffer, size_t size);
  44     virtual off_t OnSysTell() const { return m_decomp ? m_decomp->TellI() : 0; }
  45
  46 private:
  47     wxInputStream *m_decomp;
  48     wxUint32 m_crc;
  49     wxString m_name;
  50
  51 #if wxUSE_DATETIME
  52     wxDateTime m_datetime;
  53 #endif
  54
  55     DECLARE_NO_COPY_CLASS(wxGzipInputStream)
  56 };
  57
  58
  59 /////////////////////////////////////////////////////////////////////////////
  60 // wxGzipOutputStream
  61
  62 class WXDLLIMPEXP_BASE wxGzipOutputStream : public wxFilterOutputStream
  63 {
  64 public:
  65     wxGzipOutputStream(wxOutputStream& stream,
  66                        const wxString& originalName = wxEmptyString,
  67                        int level = -1,
  68                        wxMBConv& conv = wxConvFile);
  69     virtual ~wxGzipOutputStream();
  70
  71     virtual void Sync();
  72
  73 protected:
  74     virtual size_t OnSysWrite(const void *buffer, size_t size);
  75     virtual off_t OnSysTell() const { return m_comp ? m_comp->TellO() : 0; }
  76
  77 private:
  78     wxOutputStream *m_comp;
  79     wxUint32 m_crc;
  80
  81     DECLARE_NO_COPY_CLASS(wxGzipOutputStream)
  82 };
  83
  84
  85 #endif // wxUSE_STREAMS && wxUSE_GZSTREAM && wxUSE_ZLIB
  86
  87 #endif // _WX_GZSTREAM_H__