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(* alists.def address lists module.
Copyright (C) 2015-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 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 3, or (at your option)
any later version.
GNU Modula-2 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 GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
DEFINITION MODULE alists ;
FROM SYSTEM IMPORT ADDRESS ;
TYPE
alist ;
performOperation = PROCEDURE (ADDRESS) ;
(*
initList - creates a new alist, l.
*)
PROCEDURE initList () : alist ;
(*
killList - deletes the complete alist, l.
*)
PROCEDURE killList (VAR l: alist) ;
(*
putItemIntoList - places an ADDRESS, c, into alist, l.
*)
PROCEDURE putItemIntoList (l: alist; c: ADDRESS) ;
(*
getItemFromList - retrieves the nth ADDRESS from alist, l.
*)
PROCEDURE getItemFromList (l: alist; n: CARDINAL) : ADDRESS ;
(*
getIndexOfList - returns the index for ADDRESS, c, in alist, l.
If more than one CARDINAL, c, exists the index
for the first is returned.
*)
PROCEDURE getIndexOfList (l: alist; c: ADDRESS) : CARDINAL ;
(*
noOfItemsInList - returns the number of items in alist, l.
*)
PROCEDURE noOfItemsInList (l: alist) : CARDINAL ;
(*
includeItemIntoList - adds an ADDRESS, c, into a alist providing
the value does not already exist.
*)
PROCEDURE includeItemIntoList (l: alist; c: ADDRESS) ;
(*
removeItemFromList - removes an ADDRESS, c, from a alist.
It assumes that this value only appears once.
*)
PROCEDURE removeItemFromList (l: alist; c: ADDRESS) ;
(*
isItemInList - returns true if a ADDRESS, c, was found in alist, l.
*)
PROCEDURE isItemInList (l: alist; c: ADDRESS) : BOOLEAN ;
(*
foreachItemInListDo - calls procedure, P, foreach item in alist, l.
*)
PROCEDURE foreachItemInListDo (l: alist; p: performOperation) ;
(*
duplicateList - returns a duplicate alist derived from, l.
*)
PROCEDURE duplicateList (l: alist) : alist ;
(*
equalList - returns TRUE if left contains the same information as right.
*)
PROCEDURE equalList (left, right: alist) : BOOLEAN ;
END alists.
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