Hello again, akamboj84,

But I wanted to avoid the below "for" loop and instead do multi regex replacement.

...as my regex file is a long one and also i need to process a lot of files, so its kind of time/cpu consuming. I want to get rid of "for" loop...
— Re^3: Multiline Regex replacement in Multiline file

There may be some clever way to do this using Perl’s extended regular expression patterns, but if so I haven’t found it. But deployment of the for loop can likely be made much more efficient. At present, the regexen are being applied to the whole input file; but if you can read in a paragraph at a time, this will save a lot of processing, as there will then be no need for the regex engine to re-search those parts of the input string that have already been matched and replaced:

#! perl
use strict;
use warnings;

my @regexen =
(
    q{\s+user\s"[^"]+"\s+password\s"[^"]+"\s+hash2\s+access(\s+console
+){2}} .
    q{(\s+new-password-at-login)?} .
    q{(\s+member\s"(default|engineer|networktest)"){2}(\s+exit){0,2}},

    q{\s+user\s"[^"]+"\s+password\s"[^"]+"\s+hash2\s+access(\s+console
+){2}} .
    q{(\s+new-password-at-login)?} .
    q{(\s+member\s"(default|READ-ONLY)"){2}(\s+exit){0,2}},

    q{\s+user\s"[^"]+"\s+password\s"[^"]+"\s+hash2\s+access} .
    q{(\s+(console|snmp|li)){3}\s+console(\s+new-password-at-login)?} 
+.
    q{(\s+member\s"(default|LI|li-prof1)"){2}(\s+exit){0,2}},
);

my $n   = 1;
my %dic = map { qr{$_} => 'REPLACE' . $n++ } @regexen;
my $text;

{
    local $/ = '';      # Paragraph mode

    while (my $para = <DATA>)
    {
        for my $matchkey (keys %dic)
        {
            last if $para =~ s%$matchkey%$dic{$matchkey}%g;
        }

        $text .= $para;
    }
}

print $text;

__DATA__
 user "testuser1"
                password "08Cl3V.leJKU/GskqArA0Yp4MFo" hash2
                access console
                console
                    new-password-at-login
                    member "default"
                    member "engineer"

This paragraph doesn't match any of the regexen.

 user "v-test"
                password "VCp0GjSBK/KiWW.PgkQp7swXVMZ" hash2
                access console
                console
                    new-password-at-login
                    member "default"
                    member "READ-ONLY"

[download]

Output:

13:43 >perl 1011c_SoPW.pl
REPLACE1

This paragraph doesn't match any of the regexen.

REPLACE2

13:43 >

[download]

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^3: Multiline Regex replacement in Multiline file by Athanasius
in thread Multiline Regex replacement in Multiline file by akamboj84

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.