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-- String table.
-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL 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 GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with System;
with Ada.Unchecked_Conversion;
with GNAT.Table;
package body Str_Table is
package String_Table is new GNAT.Table
(Table_Index_Type => String_Id,
Table_Component_Type => Character,
Table_Low_Bound => Null_String + 1,
Table_Initial => 4096,
Table_Increment => 100);
Nul : constant Character := Character'Val (0);
In_String : Boolean := False;
function Start return String_Id
is
begin
pragma Assert (In_String = False);
In_String := True;
return String_Table.Last + 1;
end Start;
procedure Append (C : Character) is
begin
pragma Assert (In_String);
String_Table.Append (C);
end Append;
procedure Finish is
begin
pragma Assert (In_String);
String_Table.Append (Nul);
In_String := False;
end Finish;
function Get_String_Fat_Acc (Id : String_Id) return String_Fat_Acc
is
function To_String_Fat_Acc is new Ada.Unchecked_Conversion
(Source => System.Address, Target => String_Fat_Acc);
begin
return To_String_Fat_Acc (String_Table.Table (Id)'Address);
end Get_String_Fat_Acc;
function Get_Length (Id : String_Id) return Natural
is
Ptr : String_Fat_Acc;
Len : Nat32;
begin
Ptr := Get_String_Fat_Acc (Id);
Len := 1;
loop
if Ptr (Len) = Nul then
return Natural (Len - 1);
end if;
Len := Len + 1;
end loop;
end Get_Length;
function Image (Id : String_Id) return String
is
Ptr : String_Fat_Acc;
Len : Nat32;
begin
Len := Nat32 (Get_Length (Id));
Ptr := Get_String_Fat_Acc (Id);
return String (Ptr (1 .. Len));
end Image;
procedure Initialize is
begin
String_Table.Free;
String_Table.Init;
end Initialize;
end Str_Table;
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