added wxStd{In,Out}putStream classes (closes #10637)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60483 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/stdstream.h

@@ -0,0 +1,111 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/stdstream.h
+// Purpose:     Header of std::istream and std::ostream derived wrappers for
+//              wxInputStream and wxOutputStream
+// Author:      Jonathan Liu <net147@gmail.com>
+// Created:     2009-05-02
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Jonathan Liu
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_STDSTREAM_H_
+#define _WX_STDSTREAM_H_
+
+#include "wx/defs.h"    // wxUSE_STD_IOSTREAM
+
+#if wxUSE_STD_IOSTREAM
+
+#include <iosfwd>
+#include <wx/defs.h>
+#include <wx/stream.h>
+
+// ==========================================================================
+// wxStdInputStreamBuffer
+// ==========================================================================
+
+class WXDLLIMPEXP_BASE wxStdInputStreamBuffer : public std::streambuf
+{
+public:
+    wxStdInputStreamBuffer(wxInputStream& stream);
+    virtual ~wxStdInputStreamBuffer() { }
+
+protected:
+    virtual std::streambuf *setbuf(char *s, std::streamsize n);
+    virtual std::streampos seekoff(std::streamoff off,
+                                   std::ios_base::seekdir way,
+                                   std::ios_base::openmode which =
+                                       std::ios_base::in |
+                                       std::ios_base::out);
+    virtual std::streampos seekpos(std::streampos sp,
+                                   std::ios_base::openmode which =
+                                       std::ios_base::in |
+                                       std::ios_base::out);
+    virtual std::streamsize showmanyc();
+    virtual std::streamsize xsgetn(char *s, std::streamsize n);
+    virtual int underflow();
+    virtual int uflow();
+    virtual int pbackfail(int c = EOF);
+
+    wxInputStream& m_stream;
+    int m_lastChar;
+};
+
+// ==========================================================================
+// wxStdInputStream
+// ==========================================================================
+
+class WXDLLIMPEXP_BASE wxStdInputStream : public std::istream
+{
+public:
+    wxStdInputStream(wxInputStream& stream);
+    virtual ~wxStdInputStream() { }
+
+protected:
+    wxStdInputStreamBuffer m_streamBuffer;
+};
+
+// ==========================================================================
+// wxStdOutputStreamBuffer
+// ==========================================================================
+
+class WXDLLIMPEXP_BASE wxStdOutputStreamBuffer : public std::streambuf
+{
+public:
+    wxStdOutputStreamBuffer(wxOutputStream& stream);
+    virtual ~wxStdOutputStreamBuffer() { }
+
+protected:
+    virtual std::streambuf *setbuf(char *s, std::streamsize n);
+    virtual std::streampos seekoff(std::streamoff off,
+                                   std::ios_base::seekdir way,
+                                   std::ios_base::openmode which =
+                                       std::ios_base::in |
+                                       std::ios_base::out);
+    virtual std::streampos seekpos(std::streampos sp,
+                                   std::ios_base::openmode which =
+                                       std::ios_base::in |
+                                       std::ios_base::out);
+    virtual std::streamsize xsputn(const char *s, std::streamsize n);
+    virtual int overflow(int c);
+
+    wxOutputStream& m_stream;
+};
+
+// ==========================================================================
+// wxStdOutputStream
+// ==========================================================================
+
+class WXDLLIMPEXP_BASE wxStdOutputStream : public std::ostream
+{
+public:
+    wxStdOutputStream(wxOutputStream& stream);
+    virtual ~wxStdOutputStream() { }
+
+protected:
+    wxStdOutputStreamBuffer m_streamBuffer;
+};
+
+#endif // wxUSE_STD_IOSTREAM
+
+#endif // _WX_STDSTREAM_H_