From c413347e757ede98757d0f5d629a73fb0736ed26 Mon Sep 17 00:00:00 2001
From: Uwe Hermann <uwe@hermann-uwe.de>
Date: Sat, 9 Dec 2017 17:25:53 +0100
Subject: graycode: Move bitpack/bitunpack to common/.

---
 decoders/common/srdhelper/mod.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'decoders/common/srdhelper/mod.py')

diff --git a/decoders/common/srdhelper/mod.py b/decoders/common/srdhelper/mod.py
index 4871205..b559c95 100644
--- a/decoders/common/srdhelper/mod.py
+++ b/decoders/common/srdhelper/mod.py
@@ -20,3 +20,17 @@
 # Return the specified BCD number (max. 8 bits) as integer.
 def bcd2int(b):
     return (b & 0x0f) + ((b >> 4) * 10)
+
+def bitpack(bits):
+    res = 0
+    for i, b in enumerate(bits):
+        res |= b << i
+    return res
+
+def bitunpack(num, minbits=0):
+    res = []
+    while num or minbits > 0:
+        res.append(num & 1)
+        num >>= 1
+        minbits -= 1
+    return tuple(res)
-- 
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