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- Subject: How to calculate MD5 of huge files?
- From: "J.Jørgen von Bargen" <jjvb.primus@...>
- Date: Thu, 22 Apr 2010 12:35:18 +0200
Hi folks.
I'm using LuaForWindows (migrating from perl for various reasons) and I
wonder, how to calculate MD5 over huge files (e.g. ISO-Files).
In perl I can add files via a handle to a sum (excuse the use of a
foreign language in this group ;-)
$MD5->reset;
open(FILE,$file) or die "open($file) failed($!)\n";
binmode(FILE);
$MD5->addfile(*FILE);
close(FILE);
my $hex=$MD5->hexdigest;
In lua I've only found the module md5, which provides
md5.sumhexa(message)
but this requires reading the whole message into memory, which is quite
impossible for 7GB large files.
Is there any other solution?
Regards Jørgen