include/wx/stdstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/stdstream.h
   3 // Purpose:     Header of std::istream and std::ostream derived wrappers for
   4 //              wxInputStream and wxOutputStream
   5 // Author:      Jonathan Liu <net147@gmail.com>
   6 // Created:     2009-05-02
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2009 Jonathan Liu
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_STDSTREAM_H_
  13 #define _WX_STDSTREAM_H_
  14
  15 #include "wx/defs.h"    // wxUSE_STD_IOSTREAM
  16
  17 #if wxUSE_STD_IOSTREAM
  18
  19 #include <iosfwd>
  20 #include <wx/defs.h>
  21 #include <wx/stream.h>
  22
  23 // ==========================================================================
  24 // wxStdInputStreamBuffer
  25 // ==========================================================================
  26
  27 class WXDLLIMPEXP_BASE wxStdInputStreamBuffer : public std::streambuf
  28 {
  29 public:
  30     wxStdInputStreamBuffer(wxInputStream& stream);
  31     virtual ~wxStdInputStreamBuffer() { }
  32
  33 protected:
  34     virtual std::streambuf *setbuf(char *s, std::streamsize n);
  35     virtual std::streampos seekoff(std::streamoff off,
  36                                    std::ios_base::seekdir way,
  37                                    std::ios_base::openmode which =
  38                                        std::ios_base::in |
  39                                        std::ios_base::out);
  40     virtual std::streampos seekpos(std::streampos sp,
  41                                    std::ios_base::openmode which =
  42                                        std::ios_base::in |
  43                                        std::ios_base::out);
  44     virtual std::streamsize showmanyc();
  45     virtual std::streamsize xsgetn(char *s, std::streamsize n);
  46     virtual int underflow();
  47     virtual int uflow();
  48     virtual int pbackfail(int c = EOF);
  49
  50     wxInputStream& m_stream;
  51     int m_lastChar;
  52 };
  53
  54 // ==========================================================================
  55 // wxStdInputStream
  56 // ==========================================================================
  57
  58 class WXDLLIMPEXP_BASE wxStdInputStream : public std::istream
  59 {
  60 public:
  61     wxStdInputStream(wxInputStream& stream);
  62     virtual ~wxStdInputStream() { }
  63
  64 protected:
  65     wxStdInputStreamBuffer m_streamBuffer;
  66 };
  67
  68 // ==========================================================================
  69 // wxStdOutputStreamBuffer
  70 // ==========================================================================
  71
  72 class WXDLLIMPEXP_BASE wxStdOutputStreamBuffer : public std::streambuf
  73 {
  74 public:
  75     wxStdOutputStreamBuffer(wxOutputStream& stream);
  76     virtual ~wxStdOutputStreamBuffer() { }
  77
  78 protected:
  79     virtual std::streambuf *setbuf(char *s, std::streamsize n);
  80     virtual std::streampos seekoff(std::streamoff off,
  81                                    std::ios_base::seekdir way,
  82                                    std::ios_base::openmode which =
  83                                        std::ios_base::in |
  84                                        std::ios_base::out);
  85     virtual std::streampos seekpos(std::streampos sp,
  86                                    std::ios_base::openmode which =
  87                                        std::ios_base::in |
  88                                        std::ios_base::out);
  89     virtual std::streamsize xsputn(const char *s, std::streamsize n);
  90     virtual int overflow(int c);
  91
  92     wxOutputStream& m_stream;
  93 };
  94
  95 // ==========================================================================
  96 // wxStdOutputStream
  97 // ==========================================================================
  98
  99 class WXDLLIMPEXP_BASE wxStdOutputStream : public std::ostream
 100 {
 101 public:
 102     wxStdOutputStream(wxOutputStream& stream);
 103     virtual ~wxStdOutputStream() { }
 104
 105 protected:
 106     wxStdOutputStreamBuffer m_streamBuffer;
 107 };
 108
 109 #endif // wxUSE_STD_IOSTREAM
 110
 111 #endif // _WX_STDSTREAM_H_