[ale] Using Expect.pm

[Christopher Fowler]

Here is how I solved it using Expect.  Expect is what I'm using on the
streams and I do not believe it supports perl regular expressions.

--- Object ---


package SAM::Util;
use Expect;
use strict;

sub test_regex {
  my ($self, $reg) = @_;
  my $pid = fork();

  do {
    wait;
    return ( $? ? undef : 1);
  } if $pid;

  open(F, " < /dev/null");

  my @R = ();

  my $handler = sub {
    my $self = shift;
    exp_continue;
  };

  push @R, [ '-re', $reg, $handler];
  my $exp = Expect->exp_init(\*F);

  eval {
    $exp->expect(0, at R);
  };
  if($@) {
    exit 1;
  }
  exit 0;
}

return 1;

--- Test code ---
use SAM::Database;
use SAM::Util;
use Getopt::Std;
use strict;


#
# Static variables
#
my $test_regex = undef;
my $database = undef;

sub args {
  getopts('t:d:');
  $test_regex = $Getopt::Std::opt_t;
  $database = $Getopt::Std::opt_d;
  return;
}

args;

do {
  my $db = SAM::Database->new();
  $db->connect($database);
  my @T = $db->get_triggers();
  foreach my  $ref (@T) {
    next unless $ref->{'criteria_type'} eq 'R';
    print "$ref->{'name'}: ";
    my $res = SAM::Util->test_regex($ref->{'criteria'});
    print ( $res ? "syntax ok" : "syntax incorrect" );
    print "\n  $ref->{'criteria'}\n" unless $res;
    print "\n";
  }
  exit 0;
} if $database;

die "regex_text.pl <regular express>\n" unless $test_regex;
my $res = SAM::Util->test_regex($test_regex);
print ( $res ? "syntax ok" : "syntax incorrect" );
print "\n";

# vi: set ts=2 sw=2: #



On Tue, 2004-08-03 at 13:16, Geoffrey wrote:
> I'm really enjoying the Perl tutorials from Fletch, but I'm thinking 
> it's about time he billed Christopher. :)