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_STREAMS && wxUSE_STD_IOSTREAM
  18
  19 #include "wx/defs.h"
  20 #include "wx/stream.h"
  21 #include "wx/ioswrap.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() wxNOEXCEPT { }
  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     // Special work around for VC8/9 (this bug was fixed in VC10 and later):
  51     // these versions have non-standard _Xsgetn_s() that it being called from
  52     // the stream code instead of xsgetn() and so our overridden implementation
  53     // never actually gets used. To work around this, forward to it explicitly.
  54 #if defined(__VISUALC8__) || defined(__VISUALC9__)
  55     virtual std::streamsize
  56     _Xsgetn_s(char *s, size_t WXUNUSED(size), std::streamsize n)
  57     {
  58         return xsgetn(s, n);
  59     }
  60 #endif // VC8 or VC9
  61
  62     wxInputStream& m_stream;
  63     int m_lastChar;
  64 };
  65
  66 // ==========================================================================
  67 // wxStdInputStream
  68 // ==========================================================================
  69
  70 class WXDLLIMPEXP_BASE wxStdInputStream : public std::istream
  71 {
  72 public:
  73     wxStdInputStream(wxInputStream& stream);
  74     virtual ~wxStdInputStream() wxNOEXCEPT { }
  75
  76 protected:
  77     wxStdInputStreamBuffer m_streamBuffer;
  78 };
  79
  80 // ==========================================================================
  81 // wxStdOutputStreamBuffer
  82 // ==========================================================================
  83
  84 class WXDLLIMPEXP_BASE wxStdOutputStreamBuffer : public std::streambuf
  85 {
  86 public:
  87     wxStdOutputStreamBuffer(wxOutputStream& stream);
  88     virtual ~wxStdOutputStreamBuffer() wxNOEXCEPT { }
  89
  90 protected:
  91     virtual std::streambuf *setbuf(char *s, std::streamsize n);
  92     virtual std::streampos seekoff(std::streamoff off,
  93                                    std::ios_base::seekdir way,
  94                                    std::ios_base::openmode which =
  95                                        std::ios_base::in |
  96                                        std::ios_base::out);
  97     virtual std::streampos seekpos(std::streampos sp,
  98                                    std::ios_base::openmode which =
  99                                        std::ios_base::in |
 100                                        std::ios_base::out);
 101     virtual std::streamsize xsputn(const char *s, std::streamsize n);
 102     virtual int overflow(int c);
 103
 104     wxOutputStream& m_stream;
 105 };
 106
 107 // ==========================================================================
 108 // wxStdOutputStream
 109 // ==========================================================================
 110
 111 class WXDLLIMPEXP_BASE wxStdOutputStream : public std::ostream
 112 {
 113 public:
 114     wxStdOutputStream(wxOutputStream& stream);
 115     virtual ~wxStdOutputStream() wxNOEXCEPT { }
 116
 117 protected:
 118     wxStdOutputStreamBuffer m_streamBuffer;
 119 };
 120
 121 #endif // wxUSE_STREAMS && wxUSE_STD_IOSTREAM
 122
 123 #endif // _WX_STDSTREAM_H_