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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);
procedure Update_Format
(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);
procedure Update_Format
(State : in out Format;
Context : in Meaningless_Type;
Name : in Atom;
Arguments : in out Lockable.Descriptor'Class)
is
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when Commands.Align_Right =>
State.Set_Align (Right_Aligned);
when Commands.Base =>
State.Set_Symbols (Arguments);
when Commands.Images =>
Parse (State.Images, Arguments);
Image_Interpreter (Arguments, State, Meaningless_Value);
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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procedure Include
(Map : in out Atom_Maps.Map;
Values : in Interval;
Image : in Atom_Refs.Immutable_Reference) is
begin
Exclude (Map, Values);
if not Image.Is_Empty then
Map.Insert (Values, Image);
Map.Insert (Values, Image);
end if;
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;
Parse_Single_Image (Map, Expression);
Parse_Single_Affix (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
procedure Parse_Single_Affix
(Map : in out Atom_Maps.Map;
Expression : in out Lockable.Descriptor'Class)
is
function Read_Interval (Exp : in out Descriptor'Class) return Interval;
function Read_Interval (Exp : in out Descriptor'Class) return Interval is
Event : Events.Event;
First, Last : T;
begin
Exp.Next (Event);
case Event is
when Events.Add_Atom =>
First := T'Value (To_String (Exp.Current_Atom));
when others =>
raise Constraint_Error with "Lower bound not an atom";
end case;
Exp.Next (Event);
case Event is
when Events.Add_Atom =>
Last := T'Value (To_String (Exp.Current_Atom));
when others =>
raise Constraint_Error with "Upper bound not an atom";
end case;
if Last < First then
raise Constraint_Error with "Invalid interval (Last < First)";
end if;
return (First, Last);
end Read_Interval;
Event : Events.Event := Expression.Current_Event;
Lock : Lockable.Lock_State;
First, Last : T;
Affix : Atom_Refs.Immutable_Reference;
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);
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;
exception
when Constraint_Error =>
Expression.Unlock (Lock, False);
return;
when others =>
Expression.Unlock (Lock, False);
raise;
Expression.Unlock (Lock);
if Last < First then
return;
end if;
Expression.Next (Event);
Expression.Lock (Lock);
begin
Include (Map, Read_Interval (Expression), Affix);
exception
when Constraint_Error =>
null;
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;
when others =>
Expression.Unlock (Lock, False);
raise;
end;
Expression.Unlock (Lock);
when others =>
exit;
end case;
end loop;
end Parse_Single_Affix;
----------------------
-- Public Interface --
----------------------
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procedure Set_Prefix
(Object : in out Format;
Values : in Interval;
Prefix : in Atom_Refs.Immutable_Reference) is
begin
if Prefix.Is_Empty then
Exclude (Object.Prefix, Values);
else
Include (Object.Prefix, Values, Prefix);
end if;
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procedure Set_Suffix
(Object : in out Format;
Values : in Interval;
Suffix : in Atom_Refs.Immutable_Reference) is
begin
if Suffix.Is_Empty then
Exclude (Object.Suffix, Values);
else
Include (Object.Suffix, Values, Suffix);
end if;
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