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Re: decimal to binary?
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From:
Uri Guttman
Date:
September 23, 2009 12:13
Subject:
Re: decimal to binary?
Message ID:
874oqttqys.fsf@quad.sysarch.com
>>>>> "BM" == Bob McConnell <rvm@CBORD.com> writes:
BM> From: Bryan R Harris
>>
>> I need to convert a number like this: -3205.0569059
>> ... into an 8-byte double (big and little endian), e.g. 4f 3e 52 00 2a
BM> bc 93
>> d3 (I just made up those 8 byte values).
>>
>> Is this easy in perl? Are long and short ints easy as well?
BM> The sprintf() family is your friend.
that will only generate text (hex and other formats). he needs pack
which does exactly what he wants. read perlpacktut for a tutorial on
pack/unpack and then perlfunc -f pack for the reference on it.
pack can take a perl float and make a string of the internal
representation in either endian order.
for some real world examples of doing that, check out the code in
Sort::Maker which packs floats into strings and deals with endian issues
too.
uri
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