From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 27 Jan 2008 11:37:44 +0100
Subject: Initial import (2.0.2-6)

---
 reference/C/CONTRIB/SNIP/myiodemo.cpp | 168 ++++++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100755 reference/C/CONTRIB/SNIP/myiodemo.cpp

(limited to 'reference/C/CONTRIB/SNIP/myiodemo.cpp')

diff --git a/reference/C/CONTRIB/SNIP/myiodemo.cpp b/reference/C/CONTRIB/SNIP/myiodemo.cpp
new file mode 100755
index 0000000..52975d2
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/myiodemo.cpp
@@ -0,0 +1,168 @@
+// Myiodemo.cpp
+// This is a trivial program which uses the myio loopback class
+// to demonstrate the basics on writing an io interface using
+// the AT&T C++ iostream classes.
+// The program simply provides the ability to selectively add
+// to or read from a Myio instance and display information to
+// assist in understanding how it all works.
+//
+
+# include "Mystream.h"      // This includes Myio.h and iostream.h
+# include "myLine.h"
+# include <conio.h>         // For getch()
+# include <ctype.h>         // For toupper()
+# include <string.h>
+
+# define NL char('\n')
+
+    // Let's do the "application is a class" trick
+
+class myApplication
+{
+            // Defines a pointer to member function type
+            // used for dispatching the menu
+
+    typedef void (myApplication::*pvf) (void);
+
+  public:
+
+    myApplication (void) : mio() {}
+    int execute (void);
+
+  private:
+
+    iostream & stream (void) { return mio.stream(); }
+    int domenu (void);
+    void send (void);
+    void read (void);
+    void disp (void);
+    void peek (void);
+    void flsh (void);
+    void stat (void);
+
+    pvf choice;     // Function called to execute
+    Myio mio;       // IO object
+
+};
+
+
+void
+myApplication::disp (void)
+{
+    cout << "Mystream status:" << NL
+         << "Chrs in output buffer = " << stream().rdbuf()->out_waiting() << NL
+
+         << "Chrs in  input buffer = " << stream().rdbuf()->in_avail()    << NL
+
+         << "Myio object status = "
+            << mio.count() << char('/') << mio.size()
+            << " LastWrite=" << (mio.writeok() ? "OK" : "Incomplete")
+            << " LastRead=" << (mio.readok() ? "OK" : "EOF")
+         << endl;
+}
+
+    // Request a line and send it to the IO device
+
+void
+myApplication::send (void)
+{
+    cout << NL << "Enter text to write - press <ENTER> when done\n:";
+    myLine L;
+    cin >> L;
+    int l = strlen(L);
+    if (!l)
+        cerr << "Nothing entered." << endl;
+    else
+    {
+        cout << "Writing '"
+             << L
+             << char('\'')
+             << endl;
+        stream() << L << NL;    // Send the entered data, NL terminated
+        cout << "Chrs written to Myio object = " << (l + 1) << NL;
+        disp ();
+    }
+}
+
+void
+myApplication::read (void)
+{
+    cout << NL << "Reading a line from object:" << NL;
+    myLine L;
+    mio.stream().clear();
+    mio.stream() >> L;
+    int l = strlen(L);
+    if (!l)
+    {
+        cout << "Nothing read." << endl;
+        mio.stream().clear();       // Clear EOF status
+    }
+    else
+    {
+        cout << "Read '"
+             << L
+             << char('\'')
+             << endl;
+        cout << "Chrs read from Myio object = " << (l + 1) << NL;
+        disp ();
+    }
+}
+
+void
+myApplication::flsh (void)
+{
+    cout << NL << "Flushing stream" << endl;
+    stream() << flush;
+    disp ();
+}
+
+void
+myApplication::stat (void)
+{
+    cout << NL << "Myio object buffer dump:" << NL;
+    mio.dump();
+    disp ();
+    stream().rdbuf()->dbp();    // Dump stream info
+}
+
+int
+myApplication::domenu (void)
+{
+    cout << NL
+         << "W)rite  R)ead  D)ump  F)lush  Q)uit\n"
+         << "Select: "
+         << flush;      // Need to flush here for portability
+    int key;
+    for (;;)
+    {
+        key = getch ();
+        switch (toupper(key))
+        {
+        case 'W': choice = &myApplication::send;    break;
+        case 'R': choice = &myApplication::read;    break;
+        case 'D': choice = &myApplication::stat;    break;
+        case 'F': choice = &myApplication::flsh;    break;
+        case 'Q': key = 0;                          break;
+        default:
+            continue;
+        }
+        cout << char(key) << endl;
+        break;
+    }
+    return key;
+}
+
+int                         // This is really the application
+myApplication::execute (void)
+{
+    while (domenu ())
+        (this->*choice) ();
+    return 0;
+}
+
+int
+main (void)
+{
+    myApplication Demo;     // Declare the application
+    return Demo.execute (); // go for it!
+}
-- 
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