1 files changed, 63 insertions, 0 deletions
diff --git a/gnuradio-runtime/python/gnuradio/eng_option.py b/gnuradio-runtime/python/gnuradio/eng_option.py
new file mode 100644
index 0000000000..5d8660f0f2
--- /dev/null
+++ b/gnuradio-runtime/python/gnuradio/eng_option.py
@@ -0,0 +1,63 @@
+#
+# Copyright 2004 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+'''Add support for engineering notation to optparse.OptionParser'''
+
+from copy import copy
+from optparse import Option, OptionValueError
+import eng_notation
+
+def check_eng_float (option, opt, value):
+    try:
+        return eng_notation.str_to_num(value)
+    except:
+        raise OptionValueError (
+            "option %s: invalid engineering notation value: %r" % (opt, value))
+
+def check_intx (option, opt, value):
+    try:
+        return int (value, 0)
+    except:
+        raise OptionValueError (
+            "option %s: invalid integer value: %r" % (opt, value))
+
+def check_subdev (option, opt, value):
+    """
+    Value has the form: (A|B)(:0|1)?
+
+    Returns:
+        a 2-tuple (0|1, 0|1)
+    """
+    d = { 'A' : (0, 0), 'A:0' : (0, 0), 'A:1' : (0, 1), 'A:2' : (0, 2),
+          'B' : (1, 0), 'B:0' : (1, 0), 'B:1' : (1, 1), 'B:2' : (1, 2) }
+    try:
+        return d[value.upper()]
+    except:
+        raise OptionValueError(
+            "option %s: invalid subdev: '%r', must be one of %s" % (opt, value, ', '.join(sorted(d.keys()))))
+
+class eng_option (Option):
+    TYPES = Option.TYPES + ("eng_float", "intx", "subdev")
+    TYPE_CHECKER = copy (Option.TYPE_CHECKER)
+    TYPE_CHECKER["eng_float"] = check_eng_float
+    TYPE_CHECKER["intx"] = check_intx
+    TYPE_CHECKER["subdev"] = check_subdev
+