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-- Topal: GPG/GnuPG and Alpine/Pine integration
-- Copyright (C) 2001--2008 Phillip J. Brooke
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License version 3 as
-- published by the Free Software Foundation.
--
-- This program 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
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
with Ada.Text_IO;
with Ada.Unchecked_Deallocation;
package body Expanding_Array is
procedure Actual_Array_Free
is new Ada.Unchecked_Deallocation (Actual_Array, Actual_Array_Pointer);
procedure Natural_Free
is new Ada.Unchecked_Deallocation (Natural, Natural_Pointer);
procedure Positive_Free
is new Ada.Unchecked_Deallocation (Positive, Positive_Pointer);
procedure Initialize (Object : in out Big_Array) is
begin
Object.Ref_Count := new Natural;
Object.Ref_Count.all := 1;
end Initialize;
procedure Adjust (Object : in out Big_Array) is
begin
Object.Ref_Count.all := Object.Ref_Count.all + 1;
end Adjust;
procedure Finalize (Object : in out Big_Array) is
begin
Object.Ref_Count.all := Object.Ref_Count.all - 1;
begin
if Object.Ref_Count.all = 0 then
Actual_Array_Free(Object.Actual);
Natural_Free(Object.Ref_Count);
Positive_Free(Object.Array_Size);
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"AIEEE! Exception raised in Expanding_Array.Finalise");
end;
end Finalize;
procedure Create (Left : in out Big_Array;
Initial_Size : in Positive) is
A : Big_Array;
begin
A.Actual := new Actual_Array(1..Initial_Size);
A.Array_Size := new Positive;
A.Array_Size.all := Initial_Size;
Left := A;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Create");
raise;
end Create;
procedure Copy (Left : in out Big_Array;
Right : in Big_Array) is
A : Big_Array;
begin
-- Now, deep copy the array.
A.Actual := new Actual_Array(1..Size(Right));
A.Array_Size := new Positive;
A.Array_Size.all := Size(Right);
A.Actual.all(1..A.Array_Size.all) := Right.Actual.all(1..Right.Array_Size.all);
Left := A;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Copy");
raise;
end Copy;
function Size (A : Big_Array) return Positive is
begin
return A.Array_Size.all;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Size");
raise;
end Size;
function Last (A : Big_Array) return Positive is
begin
return Size(A);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Last");
raise;
end Last;
procedure Expand(A : in out Big_Array;
S : in Positive) is
New_Actual : Actual_Array_Pointer;
begin
New_Actual := new Actual_Array(1..A.Array_Size.all + S);
New_Actual.all(1..A.Array_Size.all) := A.Actual.all(1..A.Array_Size.all);
Actual_Array_Free(A.Actual);
A.Actual := New_Actual;
A.Array_Size.all := A.Array_Size.all + S;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Expand");
raise;
end Expand;
function First (A : Big_Array) return Natural is
begin
return A.Actual.all'First;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.First");
raise;
end First;
procedure Set(A : in out Big_Array;
Index : in Positive;
Value : in Item) is
begin
-- Is the array large enough?
while Last(A) < Index loop
-- Double the size....
Expand(A, A.Array_Size.all);
end loop;
-- Set the value.
if A.Actual = null then
raise Actual_Is_Null;
else
A.Actual(Index) := Value;
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Set");
raise;
end Set;
function Value(A : Big_Array;
Index : Positive) return Item is
begin
return A.Actual(Index);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Expanding_Array.Value");
raise;
end Value;
end Expanding_Array;
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