From 2375d2c8db10447ae301176a2136bcad4bb42bb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A1=C4=8Dky?= <hatschky@gmail.com>
Date: Fri, 21 Nov 2014 10:46:12 +0000
Subject: Initial commit

---
 scripts/scriptchecksum.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 scripts/scriptchecksum.py

(limited to 'scripts/scriptchecksum.py')

diff --git a/scripts/scriptchecksum.py b/scripts/scriptchecksum.py
new file mode 100644
index 0000000..d40a12d
--- /dev/null
+++ b/scripts/scriptchecksum.py
@@ -0,0 +1,28 @@
+import struct
+import sys
+
+out = open(sys.argv[2], 'w')
+sum = 0x1121
+len = 0
+with open(sys.argv[1], 'rb') as f:
+	while True:
+		byte = f.read(1)
+		if not byte:
+			break
+
+		sum ^= ord(byte)
+		for i in range(8):
+			if(sum & 1):
+				sum = (sum >> 1) ^ 0x8408
+			else:
+				sum >>= 1
+		len += 1
+	sum = ~sum & 0xFFFF
+f.closed
+
+out.write(struct.pack('<I', sum))
+out.write(struct.pack('<I', 0x0200001E))
+out.write(struct.pack('<I', 0x0200001E + len))
+with open(sys.argv[1], 'rb') as f:
+	out.write(f.read())
+f.closed
\ No newline at end of file
-- 
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