Re^2: Interpretting character combinations as special characters.

String eval for arbitary strings? A very optimistic approach. Escaping all those characters that can make perl execute malicious code is surely more work than the other solutions. And if the OP did not understand or ignored the text below your posting, you just made him insert a gapping security hole into his code.

So: --

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

Comment on Re^2: Interpretting character combinations as special characters.

Replies are listed 'Best First'.
Re^3: Interpretting character combinations as special characters. by vitoco (Hermit) on Dec 11, 2009 at 18:27 UTC
You are right... I should have begun with a big warning about how evil could `eval` be. Fortunately, OP is processing one char at a time, and I couldn't think of a one-byte malicious code. ;-) BTW, the first solution I though was this: `$text = 'h\te\nl\l\t\(o\)\n'; print "$text\n"; %token = ('\n'=>"\n", '\t'=>"\t" , '\('=>'(', '\)'=>')'); $text =~ s/(\\.)/$token{$1}\|\|$1/ges; print "$text\n";` [download] That will preserve unknown escape codes from text... Also, thanks to JavaFan, `//` operator was new to me...	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^3: Interpretting character combinations as special characters.
by vitoco (Hermit) on Dec 11, 2009 at 18:27 UTC

You are right... I should have begun with a big warning about how evil could eval be.

Fortunately, OP is processing one char at a time, and I couldn't think of a one-byte malicious code. ;-)

BTW, the first solution I though was this:

$text = 'h\te\nl\l\t\(o\)\n';
print "$text\n";
%token = ('\n'=>"\n", '\t'=>"\t" , '\('=>'(', '\)'=>')');
$text =~ s/(\\.)/$token{$1}||$1/ges;
print "$text\n";
[download]

That will preserve unknown escape codes from text...

Also, thanks to JavaFan, // operator was new to me...

[reply]
[d/l]
[select]