From 9e89588b7a4735aecb3a500bdb519457de2a0682 Mon Sep 17 00:00:00 2001
From: gashapwn <gashapwn@tildezero.lan>
Date: Sun, 4 Apr 2021 20:51:47 +0000
Subject: [PATCH] lpst.pl - shade_cell handles movement patterns exceeding the
 bounds of the board

---
 lpst.pl | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

diff --git a/lpst.pl b/lpst.pl
index 5f76632..7572c84 100644
--- a/lpst.pl
+++ b/lpst.pl
@@ -173,7 +173,10 @@ my %MOVE = (
 	    [ 0,-4], [ 0,-3], [ 0, 3], [ 0, 4],
 	    [ 1, 2], [ 3,-2], [ 3,-3], [ 4,-4]
 	]
-);
+    );
+
+my %BLOCK = (
+    );
 
 # Special cells
 my $EMPTY_CELL = "_";
@@ -191,6 +194,8 @@ my %SHADE = (
     $EMPTY_ENUM  => [$HEX_1, $HEX_2, $HEX_3]
     );
 
+my $ERR_C_1 = -1;
+
 my %sc = ();
 my %board;
 
@@ -457,7 +462,8 @@ sub apply_shift($$){
 
     $r0 += $my_shift->[0];
     $c0 += $my_shift->[1];
-    die "cell index [$r0, $c0]: out of bound exception" if $r0 > 11 or $c0 > 11 or $r0 < 1 or $c0 < 1;
+    # die "cell index [$r0, $c0]: out of bound exception" if $r0 > 11 or $c0 > 11 or $r0 < 1 or $c0 < 1;
+    return $ERR_C_1 if $r0 > 11 or $c0 > 11 or $r0 < 1 or $c0 < 1;
     return cell_index_rev($r0, $c0);
 }
 
@@ -498,17 +504,22 @@ sub calc_move($$){
 sub shade_move($){
     my $not = shift;
     my $c1;
+    my @mv1;
+    my @mv2;
 
     $c1 = cell_pi($not);
-    for my $mv (@{$MOVE{$c1}}){
-	shade_cell(calc_move($not, $mv), $SHADE_1_ENUM);
-    }
-}
 
-# sub shade_block(){
+    @mv1 = @{$MOVE{$c1}};
+    @mv2 = grep {
+	$_ ne $ERR_C_1
+    } map {
+	calc_move($not, $_)
+    } @mv1;
     
-# }
-
+    for my $mv (@mv2){
+	shade_cell($mv, $SHADE_1_ENUM);
+    }
+}
 
 # Main starts here!
 binmode(STDOUT, ":utf8");
@@ -525,7 +536,8 @@ binmode(STDOUT, ":utf8");
     $AXIS_RV{$_}
 }(1...11);
 
-my $m1 = "F7";
+# my $m1 = "F7";
+my $m1 = "A1";
 my $c1 = $MG_QS;
 
 $board{$m1} = $P1.$DIV.$c1;