Source code of Windows XP (NT5)
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62 lines
1.3 KiB

package Compare;
use strict;
use Carp;
use BinComp;
use CabComp;
use MsiComp;
use InfComp;
sub new {
my $class = shift;
my $self = bless {}, $class;
$self->_init;
return $self;
}
sub _init {
my $self = shift;
$self->AddHandler( qr/\.(msi|msm)$/i, new MsiComp );
$self->AddHandler( qr/\.cab$/i, new CabComp );
$self->AddHandler( qr/\.(inf|sif)$/i, new InfComp );
$self->AddHandler( qr//, new BinComp );
}
sub AddHandler {
my $self = shift;
my $regex = shift;
my $comparator = shift;
push @{$self->{HANDLERS}}, [$regex, $comparator];
}
sub Compare {
my $self = shift;
my ($src, $dst, $file) = @_;
# try each handler in registered order, use the first one that matches
for my $handler (@{$self->{HANDLERS}}) {
if ($file =~ /$handler->[0]/) {
$self->{LAST} = $handler->[1];
return $handler->[1]->compare("$src\\$file", "$dst\\$file");
}
}
# fall through and return undef if not handler is found
return;
}
# pass through to the last used object
sub GetLastError {
my $self = shift;
if (!defined $self->{LAST}) { return }
return $self->{LAST}->GetLastError;
}
sub GetLastDiff {
my $self = shift;
if (!defined $self->{LAST}) { return }
return $self->{LAST}->GetLastDiff;
}
1;