use strict;

my $position = 0;

my $line = 1;

my $oldbyte = 0;

my $filesize = -s $ARGV[0];

my $byte;

my $oldbyte;

print "File size is $filesize bytes.\n";

open(INPUT,$ARGV[0]) || die "can't open $ARGV[0]:\n";

while ($position < ($filesize - 1)){

   read INPUT, $byte, 1, 0;

   my $val = ord $byte;

if ( $val == 10 ) {

    if ( $oldbyte ==1) {

        $line++;

        $oldbyte = -1;

    }

    $oldbyte++;

}

if ( ($val < 32 && $val != 10 || $val > 126) ) {

  print "Line $line byte value $val at offset $position is out of ASCI
+I text range!\n";

}

#print ord $byte,"\n";

$position++;

undef $byte;

seek(INPUT, $position, 0);

}

print "$line lines in file!\n";

[download]

In reply to Find illegal ASCII characters by fmogavero

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.