Does Perl / m regex modifier change differently on Windows?

Question

The following Perl statements behave the same on Unixish machines. Do they behave differently on Windows? If so, is it because of the magic \ n?

  split m/\015\012/ms, $http_msg;
  split m/\015\012/s, $http_msg;

I got a crash on one of my CPAN modules from a Win32 smoke tester. This seems to be the problem \ r \ n vs \ n. One change I made recently is to add // m to my regular expressions.

Answer 1

For these regular expressions:

m/\015\012/ms
m/\015\012/s

Both / m and / s do not make sense.

• / s: makes a .match \n. Your regex does not contain.
• /m: ^ $ \n . ^ $, .

, (?) , \r (\015) Windows.

, ? \015

/\015?\012/

/m,/s m//. .

Answer 2

\n. \n \r ASCII, \cJ \cM . ( EBCDIC ( ) MacOS Classic ( \n \r \cM).)

, Windows, , - , , \r\n \n . ( , \cZ - !) C.

binmode , .

/s /m : , (. ^/$, ), - .

Answer 3

Why did you add /m? Are you trying to split into lines? To do this with /myou need to use ^or $in regex:

my @lines = split /^/m, $big_string;

However, if you want to treat the large string as strings, just open the file descriptor on the scalar link:

open my $string_fh, '<', \ $big_string;
while( <$string_fh> ) {
    ... process a line
    }