Hmmm .. you are hitting the "quantifier length limit" of your perl implementation (which should be 0xffff) (?).

(1) How long is your binary chunk at all (above message says "304507" - dooh!) and (2) what number is in the ... length="xxx" ... field? Really *that* large?

update:

How to read arbitary big binary chunks from within regular expressions ...

You could advance until you hit the data (after the closing of the start tag) and simply read the data that follow. This implies you have one ... ...<file>..</file> ... entry per string at this point.

 ...
 my $binary = pack 'F*', (3.141592) x 8001; # this will dump a 64K+ bi
+nary chunk
 my $string = '...blah...<file fiop="foo" length="' . length($binary) 
+.'"/>' . $binary . '</file>...blah...';

 my ($fiop, $length, $data);
 if( $string =~ m{<file \s+ fiop="([^"]+)" \s+ length="([^"]+)" />}gx 
+) {
    ($fiop, $length) = ($1, $2);                    # extract tag prop
+erties as usual
    $data = substr $string, pos($string), $length   # extract data by 
+direct string copy
 }
 
 print "$fiop, $length\n";
 print join ',', unpack("F*", $data);

 (my $notags = $string) =~ s{<file.+</file>}{};
 print "\n$notags\n";
 ...

[download]

Regards

mwa

In reply to Re^5: extracting a substring from a string - multiple variables by mwah
in thread extracting a substring from a string - multiple variables by walinsky

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