struct.unpack() and bit operations
mike at spindler.us
Thu Sep 23 18:02:43 CEST 2004
THANKS FOR THE HELP ON MY LAST INQUIRY! AWESOME ANSWERS.
I am reading in from a binary file data that is formatted as 32 *
16-bit words. So when I read it in I'm apparently not getting or
addressing correctly the upper 16-bits (since I have no choice but
read 32-bit elements - right?).
Is there an easier way to either get 16-bit "unpacks" or grab the
upper 16-bits with success?
Here's what I'm trying:
mask0 = 1111111100000000
mask1 = 0000000011111111
pdr32 = struct.unpack('%si' % (itemsize/4), pdrData.read(itemsize))
while i < 32
pdr16[x] = (pdr32[y] & (mask0 / (2**8)))
pdr16[x+1] = (pdr32[y] & mask1)
x += 2
y += 1
More information about the Python-list