include/wx/mstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mstream.h
   3 // Purpose:     Memory stream classes
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     11/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11 #ifndef __WXMMSTREAM_H__
  12 #define __WXMMSTREAM_H__
  13
  14 #include <wx/stream.h>
  15
  16 class wxMemoryStreamBase {
  17  protected:
  18   wxMemoryStreamBase();
  19   virtual ~wxMemoryStreamBase();
  20
  21   bool ChangeBufferSize(size_t new_length);
  22
  23  protected:
  24   bool m_persistent;
  25   size_t m_length;
  26   char *m_buffer;
  27   int m_iolimit;
  28 };
  29
  30 class wxMemoryInputStream: virtual public wxMemoryStreamBase, public wxInputStream {
  31   DECLARE_CLASS(wxMemoryInputStream)
  32  public:
  33   wxMemoryInputStream(const char *data, size_t length);
  34   virtual ~wxMemoryInputStream();
  35
  36   wxInputStream& Read(void *buffer, size_t size);
  37   off_t SeekI(off_t pos, wxSeekMode mode);
  38   off_t TellI() const { return m_position_i; }
  39
  40   bool Eof() const { return m_eof; }
  41   size_t LastRead() const { return m_lastread; }
  42
  43  protected:
  44   bool m_eof;
  45   off_t m_position_i;
  46   size_t m_lastread;
  47 };
  48
  49 class wxMemoryOutputStream: virtual public wxMemoryStreamBase, public wxOutputStream {
  50   DECLARE_CLASS(wxMemoryOutputStream)
  51  public:
  52   wxMemoryOutputStream(char *data = NULL, size_t length = 0);
  53   virtual ~wxMemoryOutputStream();
  54
  55   wxOutputStream& Write(const void *buffer, size_t size);
  56   off_t SeekO(off_t pos, wxSeekMode mode);
  57   off_t TellO() const { return m_position_o; }
  58
  59   bool Bad() const { return m_bad; }
  60   size_t LastWrite() const { return m_lastwrite; }
  61
  62   char *GetData() { return m_buffer; }
  63   size_t GetLength() { return m_length; }
  64
  65  protected:
  66   bool m_bad;
  67   off_t m_position_o;
  68   size_t m_lastwrite;
  69 };
  70
  71 class wxMemoryStream: public wxMemoryInputStream, public wxMemoryOutputStream {
  72   DECLARE_CLASS(wxMemoryStream)
  73  public:
  74   wxMemoryStream(char *data = NULL, size_t length = 0);
  75   virtual ~wxMemoryStream();
  76 };
  77
  78 #endif