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Length: 14336 (0x3800)
Types: Ada Source
Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Associations_Generic_Enumerated_To_Enumerated, seg_0046d2
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
└─ ⟦cfc2e13cd⟧ »Space Info Vol 2«
└─⟦this⟧
with Maps;
package body Associations_Generic_Enumerated_To_Enumerated is
Null_Association : constant String := "";
The_Separator : constant Character := '|';
function Is_Separator (This_Character : in Character) return Boolean is
begin
return This_Character = The_Separator;
end Is_Separator;
package Associations is new Maps (Is_Separator);
function Is_Associated (This_Item : in Items; With_This_Key : in Keys)
return Boolean is
The_Associations : Associations.Map;
The_Association : Associations.Mapping;
The_Key : constant String := Keys'Image (With_This_Key);
The_Item : constant String := Items'Image (This_Item);
begin
The_Associations := Associations.Create
(From_Map_File => Associations_File);
begin
The_Association := Associations.Mapping_For
The_Key, The_Associations);
Associations.Reset (The_Association);
while not Associations.Done (The_Association) loop
if Associations.Current (The_Association) = The_Item then
Associations.Dispose (The_Associations);
return True; -- Found it.
end if;
Associations.Next (The_Association);
end loop;
Associations.Dispose (The_Associations);
return False;
exception
when Associations.No_Mapping =>
Associations.Dispose (The_Associations);
return False;
end;
exception
when Associations.Io_Failure =>
raise Io_Failure;
end Is_Associated;
procedure Associate (This_Item : in Items;
With_This_Key : in Keys;
Unique : in Boolean := False) is
The_Associations : Associations.Map;
The_Association : Associations.Mapping;
The_Key : constant String := Keys'Image (With_This_Key);
The_Item : constant String := Items'Image (This_Item);
Was_Modified : Boolean := False;
Was_Already_Associated : Boolean := False;
begin
The_Associations := Associations.Create
(From_Map_File => Associations_File);
if Unique then
-- Get rid of all associations to other keys.
for Current_Key in Keys loop
begin
The_Association :=
Associations.Mapping_For
(Keys'Image (Current_Key), The_Associations);
Associations.Reset (The_Association);
while not Associations.Done (The_Association) loop
if Associations.Current (The_Association) =
The_Item then
if Current_Key = With_This_Key then
Was_Already_Associated := True;
exit;
else
Associations.Modify
(The_Association,
Null_Association); -- Turn off association.
Was_Modified := True;
end if;
end if;
Associations.Next (The_Association);
end loop;
if Was_Modified then
Associations.Add (The_Association, The_Associations);
end if;
exception
when Associations.No_Mapping =>
null;
end;
end loop;
end if;
if Was_Already_Associated then
if Was_Modified then
Associations.Save (Associations_File, The_Associations);
end if;
else
-- Create the association.
begin
The_Association := Associations.Mapping_For
(The_Key, The_Associations);
Associations.Reset (The_Association);
while not Associations.Done (The_Association) loop
if Associations.Current (The_Association) = The_Item then
Was_Already_Associated := True;
exit;
end if;
Associations.Next (The_Association);
end loop;
if not Was_Already_Associated then
Associations.Add (This_Field => The_Item,
To_Mapping => The_Association,
Using_Separator => The_Separator);
Associations.Add (The_Association, The_Associations);
Associations.Save (Associations_File, The_Associations);
end if;
exception
when Associations.No_Mapping => -- Brand new key.
Associations.Add (This_Mapping =>
The_Key & The_Separator & The_Item,
To_Map => The_Associations);
Associations.Save (Associations_File, The_Associations);
end;
end if;
Associations.Dispose (The_Associations);
exception
when Associations.Io_Failure =>
raise Io_Failure;
end Associate;
procedure Dissociate (This_Item : in Items; From_This_Key : in Keys) is
The_Associations : Associations.Map;
The_Association : Associations.Mapping;
The_Key : constant String := Keys'Image (From_This_Key);
The_Item : constant String := Items'Image (This_Item);
Was_Modified : Boolean := False;
begin
The_Associations := Associations.Create
(From_Map_File => Associations_File);
begin
The_Association := Associations.Mapping_For
(The_Key, The_Associations);
Associations.Reset (The_Association);
while not Associations.Done (The_Association) loop
if Associations.Current (The_Association) = The_Item then
Associations.Modify (The_Association, Null_Association);
Was_Modified := True;
end if;
-- Keep going, might be duplicates.
Associations.Next (The_Association);
end loop;
if Was_Modified then
Associations.Add (The_Association, The_Associations);
Associations.Save (Associations_File, The_Associations);
end if;
exception
when Associations.No_Mapping =>
null;
end;
Associations.Dispose (The_Associations);
exception
when Associations.Io_Failure =>
raise Io_Failure;
end Dissociate;
function Items_Associated_With (This_Key : in Keys) return Item_Vector is
The_Items : Item_Vector := (others => False);
The_Associations : Associations.Map;
The_Association : Associations.Mapping;
The_Key : constant String := Keys'Image (This_Key);
begin
The_Associations := Associations.Create
(From_Map_File => Associations_File);
begin
The_Association := Associations.Mapping_For
(The_Key, The_Associations);
Associations.Reset (The_Association);
Associations.Next (The_Association); -- Ignre key field.
while not Associations.Done (The_Association) loop
declare
Current_Item : constant String :=
Associations.Current (The_Association);
begin
if Current_Item /= Null_Association then
The_Items (Items'Value (Current_Item)) := True;
end if;
exception
when Constraint_Error => -- Bad entry in file.
raise Bad_Entry;
end;
Associations.Next (The_Association);
end loop;
exception
when Associations.No_Mapping =>
null;
end;
Associations.Dispose (The_Associations);
return The_Items;
exception
when Associations.Io_Failure =>
raise Io_Failure;
end Items_Associated_With;
end Associations_Generic_Enumerated_To_Enumerated;
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