Add back tool/rangify.py from hg repo

tools/rangify.py

@@ -0,0 +1,49 @@
+#!/usr/bin/python
+#
+# Copyright 2014 Google Inc. All rights reserved.
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# 
+#     http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Contributors: Rod Sheeter (rsheeter google com)
+#
+# Converts a .nam file to a list of ranges.
+
+import sys
+import tokenize
+
+if len(sys.argv) != 2:
+  print "Usage: rangify <nam file>"
+  sys.exit(1)
+
+def handle_num(type, token, (srow, scol), (erow, ecol), line):
+  global cps
+  if type == tokenize.NUMBER:
+    cps.append(int(token, 16))
+
+cps = []
+tokenize.tokenize(open(sys.argv[1]).readline, handle_num)
+cps.sort()
+
+seqs = []
+seq = (None,)
+for cp in cps:
+  if seq[0] is None:
+    seq = (cp,cp)
+  elif seq[1] == cp - 1:
+    seq = (seq[0], cp)
+  else:
+    seqs.append(seq)
+    seq = (None,)
+
+for seq in seqs:
+  print seq