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top - downloadIndex: ┃ B T ┃
Length: 2525 (0x9dd)
Types: TextFile
Names: »B«
└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
└─ ⟦129cab021⟧ »DATA«
└─⟦this⟧
└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
└─ ⟦d65440be7⟧ »DATA«
└─⟦this⟧
with Text_Io;
package body Magic is
procedure Move (Dir : in Direction; Tab : in out Square) is
begin
case Dir is
when North =>
if Tab.A'First (1) = Tab.Current_Line then
Tab.Current_Line := Tab.A'Last (1);
else
Tab.Current_Line := Line'Pred (Tab.Current_Line);
end if;
when East =>
if Tab.Current_Row = Tab.A'Last (2) then
Tab.Current_Row := Tab.A'First (2);
else
Tab.Current_Row := Row'Succ (Tab.Current_Row);
end if;
when West =>
if Tab.Current_Row = Tab.A'First (2) then
Tab.Current_Row := Tab.A'Last (2);
else
Tab.Current_Row := Row'Pred (Tab.Current_Row);
end if;
end case;
end Move;
procedure Set (X : in Token; Tab : in out Square) is
begin
Tab.A (Tab.Current_Line, Tab.Current_Row) := X;
end Set;
function Full (Tab : in Square) return Boolean is
begin
return (Tab.A (Tab.Current_Line, Tab.Current_Row) > 0);
end Full;
procedure Display (Tab : in out Square) is
package Io is new Text_Io.Integer_Io (Token);
begin
Walking (Tab);
for I in Tab.A'Range (1) loop
for J in Tab.A'Range (2) loop
Io.Put (Tab.A (I, J));
end loop;
Text_Io.Put_Line ("");
end loop;
Text_Io.Put_Line ("");
end Display;
procedure Walking (Tab : in out Square) is
X : Token := 1;
begin
Tab.Current_Line := Tab.A'Last (1) / 2;
Tab.Current_Row := Tab.A'Last (2) / 2 + 1;
Set (X, Tab);
while X < Tab.A'Last (1) * Tab.A'Last (2) loop
while Full (Tab) loop
Move (East, Tab);
Move (North, Tab);
if Full (Tab) then
Move (West, Tab);
Move (North, Tab);
end if;
end loop;
X := X + 1;
Set (X, Tab);
end loop;
end Walking;
procedure Blanking (Tab : in out Square) is
begin
for I in Tab.A'Range (1) loop
for J in Tab.A'Range (2) loop
Tab.Current_Line := I;
Tab.Current_Row := J;
Set (0, Tab);
end loop;
end loop;
end Blanking;
end Magic;