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-------------------------------------------------------------------------------
-- (C) Altran Praxis Limited
-------------------------------------------------------------------------------
--
-- The SPARK toolset is free software; you can redistribute it and/or modify it
-- under terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 3, or (at your option) any later
-- version. The SPARK toolset is distributed in the hope that it will be
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-- Public License for more details. You should have received a copy of the GNU
-- General Public License distributed with the SPARK toolset; see file
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
-- the license.
--
--=============================================================================
with Ada.Characters.Handling;
with E_Strings;
with E_Strings.Not_SPARK;
with GNAT.HTable;
package body UnitManager.UnitStore is
---------------------------------------------------------------------------
-- This package body is NOT SPARK, and should not be --
-- presented to the Examiner --
---------------------------------------------------------------------------
Max_Units : constant := 1000;
type Index is range 1 .. Max_Units;
function Hash (Id : Unit.Id) return Index;
package Unit_Table is new GNAT.HTable.Simple_HTable (
Header_Num => Index,
Element => Unit.Object,
No_Element => Unit.Null_Object,
Key => Unit.Id,
Hash => Hash,
Equal => Unit.Are_Equal);
---------------------------------------------------------------------------
function Key (From_Id : Unit.Id) return E_Strings.T
--
-- Returns a unique key (string) for the unit.
is
Result : E_Strings.T := E_Strings.Empty_String;
begin
E_Strings.Append_Examiner_String (E_Str1 => Result,
E_Str2 => From_Id.The_Name);
E_Strings.Append_String (E_Str => Result,
Str => Unit.Kind'Image (From_Id.The_Kind));
return Result;
end Key;
--------------------------------------------------------------------------------
function Hash (Id : Unit.Id) return Index is
The_Key : E_Strings.T;
function Raw_Hash (Key : String) return Index is
type Uns is mod 2 ** 32;
-- GNAT-Specific Import here
function Rotate_Left (Value : Uns;
Amount : Natural) return Uns;
pragma Import (Intrinsic, Rotate_Left);
Tmp : Uns := 0;
begin
for J in Key'Range loop
Tmp := Rotate_Left (Value => Tmp,
Amount => 1) + Character'Pos (Ada.Characters.Handling.To_Upper (Key (J)));
end loop;
return Index'First + Index'Base (Tmp mod Index'Range_Length); -- also GNAT-defined attrib
end Raw_Hash;
begin
The_Key := Key (From_Id => Id);
return Raw_Hash (Key => E_Strings.Not_SPARK.Get_String (E_Str => The_Key));
end Hash;
--------------------------------------------------------------------------------
procedure Add (The_Unit : in Unit.Object;
Added : out Boolean) is
begin
if Get (The_Unit.The_Id) = Unit.Null_Object then
Added := True;
Unit_Table.Set (K => The_Unit.The_Id,
E => The_Unit);
else
Added := False;
end if;
end Add;
--------------------------------------------------------------------------------
function Get (The_Unit : Unit.Id) return Unit.Object is
begin
return Unit_Table.Get (K => The_Unit);
end Get;
--------------------------------------------------------------------------------
function Get_Body_Unit (With_Name : in E_Strings.T) return Unit.Object is
The_Unit : Unit.Object;
begin
for Kind in Unit.Kind range Unit.Main_Program_Unit .. Unit.Separate_Body_Unit loop
The_Unit := Get (The_Unit => Unit.Id'(The_Name => With_Name,
The_Kind => Kind));
exit when The_Unit /= Unit.Null_Object;
end loop;
return The_Unit;
end Get_Body_Unit;
--------------------------------------------------------------------------------
function Get_Specification_Unit (With_Name : in E_Strings.T) return Unit.Object is
The_Unit : Unit.Object;
begin
for Kind in Unit.Specification_Unit loop
The_Unit := Get (The_Unit => Unit.Id'(The_Name => With_Name,
The_Kind => Kind));
exit when The_Unit /= Unit.Null_Object;
end loop;
return The_Unit;
end Get_Specification_Unit;
--------------------------------------------------------------------------------
function Get_All_Units return Units.Stack is
CurrentUnit : Unit.Object;
The_Units : Units.Stack := Units.NullStack;
begin
CurrentUnit := Unit_Table.Get_First;
while CurrentUnit /= Unit.Null_Object loop
Units.Push (TheStack => The_Units,
TheUnit => CurrentUnit.The_Id);
CurrentUnit := Unit_Table.Get_Next;
end loop;
return The_Units;
end Get_All_Units;
begin
Unit_Table.Reset;
end UnitManager.UnitStore;
|
