From: Bernard Blackham <dagobah@ucc.asn.au>
Date: Fri, 25 Jun 2004 15:29:46 +0000 (+0000)
Subject: Need this :)
X-Git-Tag: IMPORT-FROM-UCCCVS~154
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=b74ae9a47d39ad5b0c6d5d060ae030df107916b9;p=uccvend-vendserver.git

Need this :)
---

diff --git a/sql-edition/servers/CRC.py b/sql-edition/servers/CRC.py
new file mode 100644
index 0000000..512a7bd
--- /dev/null
+++ b/sql-edition/servers/CRC.py
@@ -0,0 +1,16 @@
+crctab = []
+CRC16 = 0x1021
+
+def do_crc(message, crc = 0):
+	for i in range(0,len(message)):
+		crc = ((crc << 8) ^ (crctab[(crc >> 8) ^ ord(message[i])])) & 0xffff
+	return crc
+
+# Generate crctab
+for val in range(0,256):
+	crc = val << 8;
+	for i in range(0,8):
+		crc = crc << 1
+		if (crc & 0x10000):
+			crc = crc ^ CRC16
+	crctab.append(crc & 0xffff)