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-- Lists data type.
-- 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.
with Types; use Types;
with Nodes; use Nodes;
package Lists is
type List_Type is new Nat32;
for List_Type'Size use 32;
Null_List : constant List_Type := 0;
List_Others : constant List_Type := 1;
List_All : constant List_Type := 2;
-----------
-- Lists --
-----------
-- Iir_Kinds_List
-- Lists of elements.
-- index is 0 .. nbr_elements - 1.
--
-- Append an element to (the end of) the list.
-- procedure Append_Element (List: in Iir; Element: Iir);
--
-- Get the N th element in list, starting from 0.
-- Return an access to the element or null_iir, if beyond bounds.
-- function Get_Nth_Element (List: in Iir; N: Natural) return Iir;
--
-- Return the last element of the list, or null_iir.
-- function Get_Last_Element (List: in Iir) return Iir;
--
-- Return the first element of the list, or null_iir.
-- function Get_First_Element (List: in Iir) return Iir;
--
-- Replace an element selected by position.
-- procedure Replace_Nth_Element (List: in Iir_List; N: Natural; El:Iir);
--
-- Add (append) an element only if it was not already present in the list.
-- Return its position.
-- procedure Add_Element (List: in Iir; El: Iir; Position: out integer);
-- procedure Add_Element (List: in Iir_List; El: Iir);
--
-- Return the number of elements in the list.
-- This is also 1 + the position of the last element.
-- function Get_Nbr_Elements (List: in Iir_List) return Natural;
--
-- Set the number of elements in the list.
-- Can be used only to shrink the list.
-- procedure Set_Nbr_Elements (List: in Iir_List; N: Natural);
--
-- Remove an element from the list.
-- procedure remove_Nth_Element (List: in Iir_List; N: Natural);
--
-- Return the position of the last element.
-- Return -1 if the list is empty.
-- function Get_Last_Element_Position (List: in Iir_List) return Integer;
--
-- Empty the list.
-- This is also set_nbr_elements (list, 0);
-- procedure Empty_List (List: in Iir_List);
--
-- Alias a list. TARGET must be empty.
-- procedure Alias_List (Target: in out Iir; Source: in Iir);
procedure Append_Element (List: List_Type; Element: Node_Type);
-- Get the N th element in list, starting from 0.
-- Return the element or null_iir, if beyond bounds.
function Get_Nth_Element (List: List_Type; N: Natural) return Node_Type;
function Get_Last_Element (List: List_Type) return Node_Type;
function Get_First_Element (List: List_Type) return Node_Type;
procedure Replace_Nth_Element (List: List_Type; N: Natural; El: Node_Type);
procedure Add_Element (List: List_Type; El: Node_Type);
-- Return the number of elements in the list.
-- This is also 1 + the position of the last element.
function Get_Nbr_Elements (List: List_Type) return Natural;
pragma Inline (Get_Nbr_Elements);
-- Same as get_nbr_elements but returns 0 if LIST is NULL_IIR.
function Get_Nbr_Elements_Safe (List : List_Type) return Natural;
-- Set the number of elements in the list.
-- Can be used only to shrink the list.
procedure Set_Nbr_Elements (List: List_Type; N: Natural);
procedure Remove_Nth_Element (List : List_Type; N: Natural);
function Get_Last_Element_Position (List: List_Type) return Integer;
-- Clear the list.
procedure Empty_List (List: List_Type);
-- Create a list.
function Create_List return List_Type;
-- Destroy a list.
procedure Destroy_List (List : in out List_Type);
-- Free all the lists and reset to initial state.
-- Must be used to free the memory used by the lists.
procedure Initialize;
end Lists;
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