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Re^2: Encoding BCD

by Aim9b (Monk)
on Jun 13, 2007 at 16:06 UTC ( #621010=note: print w/ replies, xml ) Need Help??


in reply to Re: Encoding BCD
in thread Encoding BCD

Corion, Thanks for the help, I especially like the debug piece at the end. My DecodeBCD is working (thanks in no small part to FunkyMonk), it's the ENcoding I'm having a problem with. getting from the 3 substrings, BACK to the \x12\x34..etc. Thanks.


Comment on Re^2: Encoding BCD
Re^3: Encoding BCD
by Corion (Pope) on Jun 13, 2007 at 16:14 UTC

    The following code works for me:

    use strict; use Test::More tests => 3; sub encode_BCD { return pack 'H*', join '', @_ }; is encode_BCD("123456"), "\x12\x34\x56"; is encode_BCD("00",3456),"\x00\x34\x56"; is encode_BCD("1",2),"\x12";
      I don't get it - aren't you just encoding it to Hex? That's not the same as BCD is it?

        Packed Binary-coded decimals are a subset of hexadecimal numbers, except that their values are to be interpreted differently. But as we're encoding strings that have only decimal digits in them, just treating these decimal digits as hexadecimal digits results in the wanted packed bcd values. If you don't trust it, just look at that the tests return the wanted values.

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