BrowserUk has nicely covered the case where $Config{ivsize} == 8.

Similarly it's possible to pack/unpack single precision floats when $Config{ivsize} == 4.
Obviously, you can't use the "Q" template because, according to the docs, that applies only to ivsize of 8. But you can use the "j" (or "J") templates with the "f" template: 
#!perl -l
use strict;
use warnings;
use Config;


my $val = 3.625;

if($Config{ivsize} == 4) {

 my $to_int =  unpack 'j', pack 'f', $val;;
 print $to_int; # 1080557568

 my $to_float =  unpack 'f', pack 'j', $to_int;;
 print $to_float; # 3.625

}
else {
 print "Can't pack C floats to IV/UV";
}

[download]
Cheers,
Rob

In reply to Re: integer container for float by syphilis
in thread integer container for float by basiliscos

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