From 5343ffc83e330cbcb9543261bfd4634e82c4a24d Mon Sep 17 00:00:00 2001
From: bwarsaw
Date: Wed, 19 Jul 2000 20:20:39 +0000
Subject: hexlify(), unhexlify(): New helper functions for cookie value
 encoding and decoding.

---
 Mailman/Utils.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Mailman/Utils.py b/Mailman/Utils.py
index 4c52042b0..8c7314b5c 100644
--- a/Mailman/Utils.py
+++ b/Mailman/Utils.py
@@ -609,3 +609,23 @@ def reap(kids, func=None):
             except KeyError:
                 # Huh?  How can this happen?
                 pass
+
+
+# Useful conversion routines
+# unhexlify(hexlify(s)) == s
+def hexlify(s):
+    acc = []
+    def munge(byte, acc=acc, a=ord('a'), z=ord('0')):
+        if byte > 9: acc.append(byte+a-10)
+        else: acc.append(byte+z)
+    for c in s:
+        hi, lo = divmod(ord(c), 16)
+        munge(hi)
+        munge(lo)
+    return string.join(map(chr, acc), '')
+
+def unhexlify(s):
+    acc = []
+    for i in range(0, len(s), 2):
+        acc.append(chr(int(s[i], 16)*16 + int(s[i+1], 16)))
+    return string.join(acc, '')
-- 
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