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Re^3: Perl binary file reading

by graff (Chancellor)
on May 03, 2016 at 01:25 UTC ( #1162052=note: print w/replies, xml ) Need Help??


in reply to Re^2: Perl binary file reading
in thread Perl binary file reading

What do you get if you try this on the file?
#!/usr/bin/perl use strict; use warnings; my $fname = "Words.txt"; my $fsize = -s $fname; open( my $fh, '<', $fname ) or die "$fname: $!\n"; binmode $fh; $/ = undef; my $data = <$fh>; my $length = length( $data ); my $nnulls = tr/\x00/ /; print "Read $length of $fsize bytes, changed $nnulls nulls to spaces\n +";
That will just report the basic numbers to see whether you've read the entire file, and how many null bytes it contains.

As for the stuff you're doing with ord(substr(...)) + 1; ... that looks like the sort of thing that should be done when you still have null bytes in the file (i.e. without converting the nulls to spaces). And it looks like the sort of thing you should be doing with unpack, as others have mentioned.

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