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-- Generic package to handle chains.
-- 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 GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
package body Iir_Chain_Handling is
procedure Build_Init (Last : out Iir) is
begin
Last := Null_Iir;
end Build_Init;
procedure Build_Init (Last : out Iir; Parent : Iir)
is
El : Iir;
begin
El := Get_Chain_Start (Parent);
if El /= Null_Iir then
loop
Last := El;
El := Get_Chain (El);
exit when El = Null_Iir;
end loop;
else
Last := Null_Iir;
end if;
end Build_Init;
procedure Append (Last : in out Iir; Parent : Iir; El : Iir) is
begin
if Last = Null_Iir then
Set_Chain_Start (Parent, El);
else
Set_Chain (Last, El);
end if;
Last := El;
end Append;
procedure Append_Subchain (Last : in out Iir; Parent : Iir; Els : Iir)
is
El : Iir;
begin
if Last = Null_Iir then
Set_Chain_Start (Parent, Els);
else
Set_Chain (Last, Els);
end if;
El := Els;
loop
Set_Parent (El, Parent);
Last := El;
El := Get_Chain (El);
exit when El = Null_Iir;
end loop;
end Append_Subchain;
end Iir_Chain_Handling;
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