py: Add qstr cfg capability; generate QSTR_NULL and QSTR_ from script.
diff --git a/py/makeqstrdata.py b/py/makeqstrdata.py
index f5ce277..c8e998e 100644
--- a/py/makeqstrdata.py
+++ b/py/makeqstrdata.py
@@ -40,12 +40,25 @@
 
 def do_work(infiles):
     # read the qstrs in from the input files
+    qcfgs = {}
     qstrs = {}
     for infile in infiles:
         with open(infile, 'rt') as f:
             for line in f:
+                line = line.strip()
+
+                # is this a config line?
+                match = re.match(r'^QCFG\((.+), (.+)\)', line)
+                if match:
+                    value = match.group(2)
+                    if value[0] == '(' and value[-1] == ')':
+                        # strip parenthesis from config value
+                        value = value[1:-1]
+                    qcfgs[match.group(1)] = value
+                    continue
+
                 # is this a QSTR line?
-                match = re.match(r'^Q\((.+)\)$', line.strip())
+                match = re.match(r'^Q\((.*)\)$', line)
                 if not match:
                     continue
 
@@ -63,11 +76,13 @@
     # process the qstrs, printing out the generated C header file
     print('// This file was automatically generated by makeqstrdata.py')
     print('')
+    # add NULL qstr with no hash or data
+    print('QDEF(MP_QSTR_NULL, (const byte*)"\\x00\\x00\\x00\\x00" "")')
     for order, ident, qstr in sorted(qstrs.values(), key=lambda x: x[0]):
         qhash = compute_hash(qstr)
         qlen = len(qstr)
         qdata = qstr.replace('"', '\\"')
-        print('Q(%s, (const byte*)"\\x%02x\\x%02x\\x%02x\\x%02x" "%s")' % (ident, qhash & 0xff, (qhash >> 8) & 0xff, qlen & 0xff, (qlen >> 8) & 0xff, qdata))
+        print('QDEF(MP_QSTR_%s, (const byte*)"\\x%02x\\x%02x\\x%02x\\x%02x" "%s")' % (ident, qhash & 0xff, (qhash >> 8) & 0xff, qlen & 0xff, (qlen >> 8) & 0xff, qdata))
 
     return True