1 files changed, 76 insertions, 0 deletions
diff --git a/lib/Python/Lib/Getch.py b/lib/Python/Lib/Getch.py
new file mode 100644
index 000000000..22b7ea7f8
--- /dev/null
+++ b/lib/Python/Lib/Getch.py
@@ -0,0 +1,76 @@
+class Getch:
+    """
+    Gets a single character from standard input.  Does not echo to
+    the screen.
+    """
+
+    def __init__(self):
+        try:
+            self.impl = _GetchWindows()
+        except ImportError:
+            try:
+                self.impl = _GetchMacCarbon()
+            except(AttributeError, ImportError):
+                self.impl = _GetchUnix()
+
+    def __call__(self): return self.impl()
+
+
+class _GetchUnix:
+    def __init__(self):
+        import tty
+        import sys
+
+    def __call__(self):
+        import sys
+        import tty
+        import termios
+
+        fd = sys.stdin.fileno()
+        old_settings = termios.tcgetattr(fd)
+        try:
+            tty.setraw(sys.stdin.fileno())
+            ch = sys.stdin.read(1)
+        finally:
+            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+        return ch
+
+
+class _GetchWindows:
+    def __init__(self):
+        import msvcrt
+
+    def __call__(self):
+        import msvcrt
+
+        return msvcrt.getch()
+
+class _GetchMacCarbon:
+    """
+    A function which returns the current ASCII key that is down;
+    if no ASCII key is down, the null string is returned.  The
+    page http://www.mactech.com/macintosh-c/chap02-1.html was
+    very helpful in figuring out how to do this.
+    """
+
+    def __init__(self):
+        import Carbon
+        Carbon.Evt #see if it has this (in Unix, it doesn't)
+
+    def __call__(self):
+        import Carbon
+
+        if Carbon.Evt.EventAvail(0x0008)[0] == 0: # 0x0008 is the keyDownMask
+            return ''
+        else:
+            #
+            # The event contains the following info:
+            # (what,msg,when,where,mod)=Carbon.Evt.GetNextEvent(0x0008)[1]
+            #
+            # The message (msg) contains the ASCII char which is
+            # extracted with the 0x000000FF charCodeMask; this
+            # number is converted to an ASCII character with chr() and
+            # returned
+            #
+            (what, msg, when, where, mod) = Carbon.Evt.GetNextEvent(0x0008)[1]
+            return chr(msg)
+\ No newline at end of file