[contrib] Add a utility to convert an IE page to an enum

This script is parsing the values, converting the bits into
a number and replacing the text... This should help to go from
spec to code more quickly... next thing would be this for the
structs used...

openbsc/contrib/convert_to_enum.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+
+#
+# Convert ETSI documents to an enum
+#
+
+import re, sys
+
+def convert(string):
+    string = string.strip().replace(" ", "").rjust(8, "0")
+    var = 0
+    offset = 7
+    for char in string:
+        assert offset >= 0
+        var = var | (int(char) << offset)
+        offset = offset - 1
+
+    return var
+
+def string(name):
+    name = name.replace(" ", "_")
+    name = name.replace('"', "")
+    name = name.replace('/', '_')
+    name = name.replace('(', '_')
+    name = name.replace(')', '_')
+    return "%s_%s" % (sys.argv[2], name.upper())
+
+file = open(sys.argv[1])
+
+
+for line in file:
+    m = re.match(r"[ \t]*(?P<value>[01 ]+)[ ]+(?P<name>[a-zA-Z /0-9()]+)", line[:-1])
+
+    if m:
+        print "\t%s\t\t= %d," % (string(m.groupdict()["name"]), convert(m.groupdict()["value"]))
+    else:
+        print line[:-1]