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Module to convert any multiple of bytes to any other multiple?

Posted on 2000-03-09
4
181 Views
Last Modified: 2012-05-04
Is there a module that can handle conversion from any multiple of byte to any other multiple?  For example

$GB = &convert(kB,GB,$num);

This sub would take the first arg as what $num IS (a # of kB) and transform to GB.

$kB = &convert(GB,kB,$num);

This would take $num understood to be in GB and convert to kB...

The idea is faily simple but the multiples get annoying to have to account for all cases...?
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Question by:guadalupe
  • 3
4 Comments
 
LVL 3

Author Comment

by:guadalupe
ID: 2602416
Well I though about and came up with this code:

sub convert_k($$$)
{
      ($from,$to,$number) = @_;

      #Set up hash for math conversions between bytes - kB and MB GB
      $byteMath{"B"} = 1;

      $byteMath{"kB"} = 2;

      $byteMath{"MB"} = 3;

      $byteMath{"GB"} = 4;

      $byte_multiple = 1024;

      $power = $byteMath{$from} - $byteMath{$to};

      return $number * ($byte_multiple ** $power);
}

I had hoped to not have to right the code as no idea came to mind and then it hit me.  I would still be interested to know if a modual exists.  But the code above is good so take it if it interests you!
0
 
LVL 3

Author Comment

by:guadalupe
ID: 2602431
A stupid but good improvment:


#!/usr/local/bin/perl


print &convert_k($ARGV[0],$ARGV[1],$ARGV[2]);


sub convert_k($$$)
{
      ($from,$to,$number) = @_;

      $from      = uc($from);

      $to      = uc($to);

      #Set up hash for math conversions between bytes - kB and MB GB
      $byteMath{"B"} = 1;

      $byteMath{"KB"} = 2;

      $byteMath{"MB"} = 3;

      $byteMath{"GB"} = 4;

      $byte_multiple = 1024;

      $power = $byteMath{$from} - $byteMath{$to};

      return $number * ($byte_multiple ** $power);
}
0
 
LVL 3

Accepted Solution

by:
monas earned 100 total points
ID: 2602444
package KMGconv;
%mult =(
  B=>1,
  kB=>1024,
  MB=>1024*1024,
  GB=>1024*1024*1024,
  TB=>1024*1024*1024*1024,
  );

sub  convert{
  my($from, $to, $amount)=@_;
  return $amount*$mult{$from}/$mult{$to};
}

-------------------------
use KMGconv;

print KMGconv::convert(MB,kB, 12);

--------------------------

you can define more constant, or use 1000's if you prefer.

Good Look!
0
 
LVL 3

Author Comment

by:guadalupe
ID: 2602522
Thank you!  Very nice though I'm still curious if one already exists  just to see how "they" chose to do it...
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