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

interface/wx/stdstream.h

@@ -0,0 +1,190 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        stdstream.h
+// Purpose:     interface of wxStdInputStream, wxStdInputStreamBuffer,
+//              wxStdOutputStream, wxStdOutputStreamBuffer
+// Author:      Jonathan Liu <net147@gmail.com>
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Jonathan Liu
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+    @class wxStdInputStreamBuffer
+
+    wxStdInputStreamBuffer is a std::streambuf derived stream buffer which
+    reads from a wxInputStream.
+
+    Example:
+    @code
+    wxFFileInputStream file("input.txt.gz");
+    wxZlibInputStream gzipInput(file, wxZLIB_GZIP);
+    wxStdInputStreamBuffer gzipStreamBuffer(gzipInput);
+
+    // redirect std::cin to read from compressed file
+    std::streambuf* streamBufferOld = std::cin.rdbuf(&gzipStreamBuffer);
+
+    // prompt for integer
+    int number;
+    std::cout << "Enter an integer: " << std::flush;
+    std::cin >> number;
+    std::cout << std::endl;
+    std::cout << "You entered the integer " << number << "." << std::endl;
+
+    // restore std::cin
+    std::cin.rdbuf(streamBufferOld);
+    @endcode
+
+    @library{wxbase}
+    @category{streams}
+
+    @see wxInputStream, wxStdInputStream
+*/
+class wxStdInputStreamBuffer : public std::streambuf
+{
+public:
+    /**
+        Creates a std::steambuf derived stream buffer which reads from a
+        wxInputStream.
+
+        @param stream
+            Stream to read from.
+    */
+    wxStdInputStreamBuffer(wxInputStream& stream);
+
+    /**
+        Destructor.
+    */
+    virtual ~wxStdInputStreamBuffer() { }
+};
+
+/**
+    @class wxStdInputStream
+
+    wxStdInputStream is a std::istream derived stream buffer which reads from
+    a wxInputStream.
+
+    Example:
+    @code
+    wxFFileInputStream file("words.txt");
+    wxStdInputStream in(file);
+    std::vector<std::string> words;
+
+    // read words from stdin
+    std::copy(std::istream_iterator<std::string>(in),
+              std::istream_iterator<std::string>(),
+              std::back_inserter(words));
+
+    // sort and remove duplicates
+    std::sort(words.begin(), words.end());
+    words.resize(std::unique(words.begin(), words.end()) - words.begin());
+
+    // print words
+    std::copy(words.begin(), words.end(),
+              std::ostream_iterator<std::string>(std::cout, "\n"));
+    @endcode
+
+    @library{wxbase}
+    @category{streams}
+
+    @see wxInputStream, wxStdInputStreamBuffer
+*/
+class wxStdInputStream : public std::istream
+{
+public:
+    /**
+        Creates a std::istream derived stream which reads from a
+        wxInputStream.
+
+        @param stream
+            Stream to read from.
+    */
+    wxStdInputStream(wxInputStream& stream);
+
+    /**
+        Destructor.
+    */
+    virtual ~wxStdInputStream() { }
+};
+
+/**
+    @class wxStdOutputStreamBuffer
+
+    wxStdOutputStreamBuffer is a std::streambuf derived stream buffer which
+    writes to a wxOutputStream.
+
+    Example:
+    @code
+    wxFFileOutputStream file("cout.txt.gz");
+    wxZlibOutputStream gzipOutput(file, -1, wxZLIB_GZIP);
+    wxStdOutputStreamBuffer gzipStreamBuffer(gzipOutput);
+
+    // redirect std::cout to cout.txt.gz using GZIP compression
+    std::streambuf* streamBufferOld = std::cout.rdbuf(&gzipStreamBuffer);
+
+    // write to std::cout
+    std::cout << "Hello world!" << std::endl;
+
+    // restore std::cout
+    std::cout.rdbuf(streamBufferOld);
+    @endcode
+
+    @library{wxbase}
+    @category{streams}
+
+    @see wxOutputStream, wxStdOutputStream
+*/
+class wxStdOutputStreamBuffer : public std::streambuf
+{
+public:
+    /**
+        Creates a std::steambuf derived stream buffer which writes to a
+        wxOutputStream.
+
+        @param stream
+            Stream to write to.
+    */
+    wxStdOutputStreamBuffer(wxOutputStream& stream);
+
+    /**
+        Destructor.
+    */
+    virtual ~wxStdOutputStreamBuffer() { }
+};
+
+/**
+    @class wxStdOutputStream
+
+    wxStdOutputStream is a std::ostream derived stream which writes to a
+    wxOutputStream.
+
+    Example:
+    @code
+    wxFFileOutputStream file("out.txt.gz");
+    wxZlibOutputStream gzipOutput(file, -1, wxZLIB_GZIP);
+    wxStdOutputStream out(gzipOutput);
+
+    out << "Hello world!" << std::endl;
+    @endcode
+
+    @library{wxbase}
+    @category{streams}
+
+    @see wxOutputStream, wxStdOutputStreamBuffer
+*/
+class wxStdOutputStream : public std::ostream
+{
+public:
+    /**
+        Creates a std::ostream derived stream which writes to a
+        wxOutputStream.
+
+        @param stream
+            Stream to write to.
+    */
+    wxStdOutputStream(wxOutputStream& stream);
+
+    /**
+        Destructor.
+    */
+    virtual ~wxStdOutputStream() { }
+};