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# -*- perl -*-
#
# Copyright (C) Heinz-Josef Claes (2000-2012)
# hjclaes@web.de
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
push @VERSION, '$Id: humanRead.pl 362 2012-01-28 22:11:13Z hjc $ ';
use strict;
######################################################################
# Stellt eine Zahl als dreistellig + Zeichen dar, analog `df -h`
sub humanReadable
{
my (@par) = (@_);
my (@type) = (' ', 'k', 'M', 'G', 'T', 'P');
my (@ret, $s);
foreach $s (@par)
{
my $i;
for ($i = 0 ; $i < @type - 1; $i++, $s /= 1024.)
{
if ($s < 10)
{
push @ret, sprintf("%.1f%s", $s, $type[$i]);
goto nextNumber;
}
elsif ($s < 999.5)
{
push @ret, sprintf("%3.0f%s", $s, $type[$i]);
goto nextNumber;
}
}
push @ret, sprintf("%3.0f%s", $s, $type[$i]);
nextNumber:;
}
return @ret;
}
######################################################################
# rechnet von G, k, etc. auf Zahl zurck
sub revertHumanReadable
{
my ($s, @ret);
my (%mult) = ('k' => 1024,
'M' => 1024**2,
'G' => 1024**3,
'T' => 1024**4,
'P' => 1024**5);
foreach $s (@_)
{
if ($s =~ /\A\s*(\d+)\s*\Z/)
{
push @ret, $1;
}
elsif ($s =~ /\A\s*([\d\.]+)([kMGTP])\s*\Z/)
{
push @ret, (exists $mult{$2}) ? $1 * $mult{$2} : undef;
}
else
{
push @ret, undef;
}
}
return @ret;
}
######################################################################
sub packwithLen
{
my $format = shift; # pack format string, rest in @_ is argument to pack
my $entry = pack($format, @_);
return pack('S', length($entry)) . $entry;
}
######################################################################
sub unpackwithLen
{
my $format = shift;
my $packedData = shift;
my $len = unpack('S', $packedData);
# returns next entries of packedData und the unpacked values
return (substr($packedData, $len + 2),
unpack($format, substr($packedData, 2)));
}
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