REGEX problem Post: 302429825

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Top Forums Programming REGEX problem Post 302429825 by DeepakS on Tuesday 15th of June 2010 05:09:02 PM

06-15-2010

Registered User

What I'm doing here is checking to see if a line has 'Route Distinguisher' in it, and if so then storing the key string in a variable ($buf). If not then I'm storing the values into a hash of arrays of arrays.

Code:

#! /usr/bin/perl -w

open(my $inpFile, "<", "inp.txt") || die $?;

my $buf;
my %HoAoA;

while(<$inpFile>)
{
	chomp;
	s/(^\W+|\W+$)//g;

        if (m/Network\s+Next Hop\s+From\s+AS Path/) {
                next;
        }
	if(m/.*Route Distinguisher.*/)
	{
		my ($junk, $rd) = split(/:\W+/);
		$buf = $rd;
	}
	else
	{
		my @arr = split(/\s+/);
		push @{ $HoAoA{$buf} }, [@arr];
	}
}

close $inpFile;

I banged this out quickly so there's no validation, error checking, or warranty but it should get you started.

Here's an unwrap which outputs the Route Distinguisher followed by a colon then comma separated values for each row of input:

Code:

foreach $key (keys %HoAoA)
{
	foreach $rowArr ($HoAoA{$key})
	{
		foreach $val (@$rowArr)
		{
			print $key . ":" . join(',', @$val) . "\n";
		}
	}
}

Last edited by DeepakS; 06-17-2010 at 01:09 PM.. Reason: Added more code

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LEARN ABOUT CENTOS

re_exec

RE_COMP(3)						     Linux Programmer's Manual							RE_COMP(3)

NAME

       re_comp, re_exec - BSD regex functions

SYNOPSIS

       #define _REGEX_RE_COMP
       #include <sys/types.h>
       #include <regex.h>

       char *re_comp(char *regex);

       int re_exec(char *string);

DESCRIPTION

       re_comp()  is used to compile the null-terminated regular expression pointed to by regex.  The compiled pattern occupies a static area, the
       pattern buffer, which is overwritten by subsequent use of re_comp().  If regex is NULL, no operation is performed and the pattern  buffer's
       contents are not altered.

       re_exec() is used to assess whether the null-terminated string pointed to by string matches the previously compiled regex.

RETURN VALUE

       re_comp() returns NULL on successful compilation of regex otherwise it returns a pointer to an appropriate error message.

       re_exec() returns 1 for a successful match, zero for failure.

ATTRIBUTES

   Multithreading (see pthreads(7))
       The re_comp() and re_exec() functions are not thread-safe.

CONFORMING TO

       4.3BSD.

NOTES

       These functions are obsolete; the functions documented in regcomp(3) should be used instead.

SEE ALSO

       regcomp(3), regex(7), GNU regex manual

COLOPHON

       This  page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2013-06-21								RE_COMP(3)

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