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qrdecode: fix infinite loop when encoding type is 1 (numeric)

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Signed-off-by: Steven Noonan <steven@uplinklabs.net>
This commit is contained in:
Steven Noonan 2017-05-20 02:43:05 -07:00
parent d4a7ca080e
commit 66f4a852a9
1 changed files with 4 additions and 0 deletions
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4
py/qr/qrdecode.py
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@ -223,11 +223,15 @@ def parse_bits(bits, version):
while l > 0: while l > 0:
if l >= 3: if l >= 3:
num, bits = bits_to_int(bits[:10]), bits[10:] num, bits = bits_to_int(bits[:10]), bits[10:]
l -= 3
elif l >= 2: elif l >= 2:
num, bits = bits_to_int(bits[:7]), bits[7:] num, bits = bits_to_int(bits[:7]), bits[7:]
l -= 2
else: else:
num, bits = bits_to_int(bits[:3]), bits[3:] num, bits = bits_to_int(bits[:3]), bits[3:]
l -= 1
buf += str(num) buf += str(num)
return buf, bits
elif enc == 2: # Alphanumeric elif enc == 2: # Alphanumeric
n_l = 9 if version < 10 else 11 if version < 27 else 13 n_l = 9 if version < 10 else 11 if version < 27 else 13
l, bits = bits_to_int(bits[:n_l]), bits[n_l:] l, bits = bits_to_int(bits[:n_l]), bits[n_l:]