Op donderdag 19 februari 2015 19:25:14 UTC+1 schreef Dave Angel: > I wrote the following pair of functions: > > def seven_code(n): > acc = bytearray() > if n == 0: > acc.append(0) > while n > 0: > quotient, remainder = divmod(n, 128) > acc.append(remainder) > n = quotient > acc[-1] |= 0x80 #add a stop bit to last byte > return acc > > def seven_decode(sequ): > acc = 0 > multiplier = 1 > for by in sequ: > acc += (by & 0x7f) * multiplier > if by > 0x7f: > break > multiplier *= 128 > return acc > > Here's a couple of ranges of output, showing that the 7bit scheme does > better for values between 384 and 16379. Thanks for this test; I obviously should have done it myself. Please have a look at http://optarbvalintenc.blogspot.nl/2015/04/inputs-from-complangpython.html and the next two postings.
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