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procedure Insert_Image
(State : in out Format;
Context : in Meaningless_Type;
Image : in Atom);
procedure Update_Image
(State : in out Format;
Context : in Meaningless_Type;
Name : in Atom;
Arguments : in out Lockable.Descriptor'Class);
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Image : in Atom)
is
pragma Unreferenced (Context);
begin
State.Append_Image (Image);
end Insert_Image;
procedure Update_Image
(State : in out Format;
Context : in Meaningless_Type;
Name : in Atom;
Arguments : in out Lockable.Descriptor'Class)
is
pragma Unreferenced (Context);
Value : T;
begin
begin
Value := T'Value (To_String (Name));
exception
when Constraint_Error =>
return;
end;
case Arguments.Current_Event is
when Events.Add_Atom =>
State.Set_Image (Value, Arguments.Current_Atom);
when others =>
State.Remove_Image (Value);
end case;
end Update_Image;
procedure Image_Interpreter is new Interpreter_Loop
(Format, Meaningless_Type, Update_Image, Insert_Image);
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when Commands.Align_Right =>
State.Set_Align (Right_Aligned);
when Commands.Base =>
State.Set_Symbols (Arguments);
when Commands.Images =>
Image_Interpreter (Arguments, State, Meaningless_Value);
Parse (State.Images, Arguments);
when Commands.Padding =>
case Arguments.Current_Event is
when Events.Add_Atom =>
State.Left_Padding := Create (Arguments.Current_Atom);
State.Right_Padding := State.Left_Padding;
when others =>
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Length := Length + 1;
Output.Append (Symbols (Digit).Query.Data.all);
exit when Remainder = 0;
end loop;
end Reverse_Render;
-----------------------
-- Dynamic Atom Maps --
-----------------------
procedure Exclude
(Map : in out Atom_Maps.Map;
Values : in Interval)
is
procedure Delete_And_Next
(Target : in out Atom_Maps.Map;
Cursor : in out Atom_Maps.Cursor);
procedure Delete_And_Next
(Target : in out Atom_Maps.Map;
Cursor : in out Atom_Maps.Cursor)
is
Next : constant Atom_Maps.Cursor := Atom_Maps.Next (Cursor);
begin
Target.Delete (Cursor);
Cursor := Next;
end Delete_And_Next;
Cursor : Atom_Maps.Cursor := Map.Ceiling ((Values.First, Values.First));
begin
if not Atom_Maps.Has_Element (Cursor) then
return;
end if;
pragma Assert (not (Atom_Maps.Key (Cursor).Last < Values.First));
if Atom_Maps.Key (Cursor).First < Values.First then
declare
Old_Key : constant Interval := Atom_Maps.Key (Cursor);
Prefix_Key : constant Interval
:= (Old_Key.First, T'Pred (Values.First));
Prefix_Image : constant Atom_Refs.Immutable_Reference
:= Atom_Maps.Element (Cursor);
begin
Delete_And_Next (Map, Cursor);
Map.Insert (Prefix_Key, Prefix_Image);
if Values.Last < Old_Key.Last then
Map.Insert ((T'Succ (Values.Last), Old_Key.Last), Prefix_Image);
return;
end if;
end;
end if;
while Atom_Maps.Has_Element (Cursor)
and then not (Values.Last < Atom_Maps.Key (Cursor).Last)
loop
Delete_And_Next (Map, Cursor);
end loop;
if Atom_Maps.Has_Element (Cursor)
and then not (Values.Last < Atom_Maps.Key (Cursor).First)
then
declare
Old_Key : constant Interval := Atom_Maps.Key (Cursor);
Suffix_Key : constant Interval
:= (T'Succ (Values.Last), Old_Key.Last);
Suffix_Image : constant Atom_Refs.Immutable_Reference
:= Atom_Maps.Element (Cursor);
begin
Delete_And_Next (Map, Cursor);
Map.Insert (Suffix_Key, Suffix_Image);
end;
end if;
end Exclude;
procedure Include
(Map : in out Atom_Maps.Map;
Values : in Interval;
Image : in Atom_Refs.Immutable_Reference) is
begin
Exclude (Map, Values);
Map.Insert (Values, Image);
end Include;
procedure Parse
(Map : in out Atom_Maps.Map;
Expression : in out Lockable.Descriptor'Class)
is
Event : Events.Event := Expression.Current_Event;
Lock : Lockable.Lock_State;
begin
loop
case Event is
when Events.Add_Atom =>
declare
Index : constant T := Next_Index (Map);
begin
Include
(Map,
(Index, Index),
Create (Expression.Current_Atom));
end;
when Events.Open_List =>
Expression.Lock (Lock);
begin
Expression.Next;
Parse_Single_Image (Map, Expression);
exception
when others =>
Expression.Unlock (Lock, False);
raise;
end;
Expression.Unlock (Lock);
Event := Expression.Current_Event;
exit when Event in Events.Error | Events.End_Of_Input;
when Events.Close_List | Events.Error | Events.End_Of_Input =>
exit;
end case;
Expression.Next (Event);
end loop;
end Parse;
procedure Parse_Single_Image
(Map : in out Atom_Maps.Map;
Expression : in out Lockable.Descriptor'Class)
is
Event : Events.Event := Expression.Current_Event;
Lock : Lockable.Lock_State;
First, Last : T;
begin
case Event is
when Events.Add_Atom =>
begin
First := T'Value (To_String (Expression.Current_Atom));
Last := First;
exception
when Constraint_Error =>
return;
end;
when Events.Open_List =>
Expression.Lock (Lock);
begin
Expression.Next (Event);
if Event = Events.Add_Atom then
First := T'Value (To_String (Expression.Current_Atom));
else
Expression.Unlock (Lock, False);
return;
end if;
Expression.Next (Event);
if Event = Events.Add_Atom then
Last := T'Value (To_String (Expression.Current_Atom));
else
Expression.Unlock (Lock, False);
return;
end if;
exception
when Constraint_Error =>
Expression.Unlock (Lock, False);
return;
when others =>
Expression.Unlock (Lock, False);
raise;
end;
Expression.Unlock (Lock);
when others =>
return;
end case;
if Last < First then
return;
end if;
Expression.Next (Event);
if Event = Events.Add_Atom then
Include (Map, (First, Last), Create (Expression.Current_Atom));
else
Exclude (Map, (First, Last));
end if;
end Parse_Single_Image;
----------------------
-- Public Interface --
----------------------
function Render (Value : T; Template : Format) return Atom is
function "*" (Count : Width; Symbol : Atom) return Atom;
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Has_Sign : Boolean := True;
Length : Width;
Symbols : constant Atom_Arrays.Immutable_Reference
:= (if Template.Symbols.Is_Empty then Decimal else Template.Symbols);
begin
Check_Explicit_Image :
declare
Cursor : constant Atom_Maps.Cursor := Template.Images.Find (Value);
Cursor : constant Atom_Maps.Cursor
:= Template.Images.Find ((Value, Value));
begin
if Atom_Maps.Has_Element (Cursor) then
return Atom_Maps.Element (Cursor).Query.Data.all;
end if;
end Check_Explicit_Image;
if Value < 0 then
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begin
Append_Image (Object, Create (Image));
end Append_Image;
procedure Remove_Image (Object : in out Format; Value : in T) is
begin
Object.Images.Exclude (Value);
Exclude (Object.Images, (Value, Value));
end Remove_Image;
procedure Set_Align (Object : in out Format; Value : in Alignment) is
begin
Object.Align := Value;
end Set_Align;
procedure Set_Image
(Object : in out Format;
Value : in T;
Image : in Atom_Refs.Immutable_Reference) is
begin
Object.Images.Include (Value, Image);
Include (Object.Images, (Value, Value), Image);
end Set_Image;
procedure Set_Image
(Object : in out Format;
Value : in T;
Image : in Atom) is
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