tool: uuid128_format parses UUID128 and prints it as both big and little endian

tool/uuid128_formats.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+#
+# Parase and dump UUID128 in various formats
+
+import codecs
+import io
+import os
+import re
+import string
+import sys
+
+usage = '''
+Usage: ./uuid128_formats.py UUID128
+'''
+
+def twoByteLEFor(value):
+    return [ (value & 0xff), (value >> 8)]
+
+def parseUUID128(uuid):
+    parts = re.match("([0-9A-Fa-f]{4})([0-9A-Fa-f]{4})-([0-9A-Fa-f]{4})-([0-9A-Fa-f]{4})-([0-9A-Fa-f]{4})-([0-9A-Fa-f]{4})([0-9A-Fa-f]{4})([0-9A-Fa-f]{4})", uuid)
+    uuid_bytes = []
+    for i in range(8, 0, -1):
+        uuid_bytes = uuid_bytes + twoByteLEFor(int(parts.group(i),16))
+    return uuid_bytes
+
+if (len(sys.argv) < 2):
+    print(usage)
+    sys.exit(1)
+
+uuid128 = sys.argv[1]
+uuid_bytes = parseUUID128(uuid128)
+print('UUID128:       %s' % uuid128)
+print('little endian: %s' % ', '.join( [hex(i) for i in uuid_bytes] ))
+print('big endian:    %s' % ', '.join( [hex(i) for i in reversed(uuid_bytes)] ))