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Re: bits from bytes [message #10661 is a reply to message #10660]

Sat, 20 December 1997 00:00

Robert Moss
Messages: 74
Registered: February 1996

Member

Kelly Dean wrote:
>
> I need to extract the first 3 bits from a byte.
>
> Any suggestions?
>
> Kelly Dean
> CSU/CIRA

b = 11B ; a byte of data
foo = [ 2^0, 2^1, 2^2, 2^3 ]
bits = ( b AND foo ) ne 0
print, bits[0]
1
print, bits[1]
1
print, bits[2]
0
print, bits[3]
1

I assume of course you have encoded information into each
individual bit. If what you want is the first three bits together,
it would simply be ( b AND 7 ) = 3

--
Robert M. Moss, Ph.D. - mossrm@texaco.com - FAX (713)954-6911
------------------------------------------------------------ -----
This does not necessarily reflect the opinions of Texaco Inc.

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[Message index]

		Re: bits from bytes By: Kevin Ivory on Sat, 20 December 1997 00:00
		Re: bits from bytes By: Robert Moss on Sat, 20 December 1997 00:00
		Re: bits from bytes By: davidf on Fri, 19 December 1997 00:00

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