adventofcode/18/2.pl
Yanick Champoux 3684ca9d1a day18
2017-12-18 13:45:46 -05:00

74 lines
1.8 KiB
Perl

use 5.20.0;
use experimental qw/ signatures postderef /;
use List::AllUtils qw/ any /;
my @commands = <>;
my @prog = map { bless
{ q => [], id => $_, reg => { p => $_ }, }, 'Prog'
} 0..1;
use DDP;
my $sent1;
package Prog {
my $vr = qr/(?<val>-?\d+|.)/;
sub valof($self, $x) {
$x =~ /\d/ ? $x : $self->{reg}{$x};
}
sub run($self) {
while() {
use DDP;
my $i = $self->{i};
my $c = $commands[$i] or return;
if( $c =~ /snd (.)/ ) {
warn ++$sent1 if $self->{id};
push $prog[ 1 - $self->{id} ]->{q}->@*, $self->valof($1);
}
elsif( $c =~ /set (.) $vr/ ) {
$self->{reg}{$1} = $self->valof($2);
}
elsif( $c =~ /add (.) $vr/ ) {
$self->{reg}{$1} += $self->valof($2);
}
elsif( $c =~ /mul (.) $vr/ ) {
$self->{reg}{$1} *= $self->valof($2);
}
elsif( $c =~ /mod (.) $vr/ ) {
$self->{reg}{$1} %= $self->valof($2);
}
elsif( $c =~ /jgz (.) $vr/ ) {
$self->{i} += ($self->valof($1) > 0) ? $self->valof($2) : 1;
next;
}
elsif( $c =~ /rcv (.)/ ) {
return unless $self->{q}->@*;
my $j = shift $self->{q}->@*;
$self->{reg}{$1} = $j;
}
else { die "wut? $_"; }
$self->{i}++;
}
}
}
while() {
$prog[1]->run;
$prog[0]->run;
# p @prog;
# my $dummy = <STDIN>;
warn join ":", map { $_->{i} } @prog;
last unless any { scalar $_->@* } map { $_->{q} } @prog;
last if 2 == grep { $_ >= @commands } map { $_->{i} } @prog;
}
say $sent1;