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(* M2StackAddress.def provides a generic stack for ADDRESS sized objects.
Copyright (C) 2001-2025 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 M2StackAddress ;
(*
Title : M2StackAddress
Author : Gaius Mulley
System : UNIX (GNU Modula-2)
Date : Fri Oct 12 17:26:50 2001
Revision : $Version$
Description: provides a generic stack for ADDRESS sized objects.
*)
FROM SYSTEM IMPORT ADDRESS ;
EXPORT QUALIFIED StackOfAddress, InitStackAddress, KillStackAddress,
PushAddress, PopAddress, PeepAddress,
IsEmptyAddress, NoOfItemsInStackAddress ;
TYPE
StackOfAddress ;
(*
InitStackAddress - creates and returns a new stack.
*)
PROCEDURE InitStackAddress () : StackOfAddress ;
(*
KillStackAddress - destroys a stack, returning NIL.
*)
PROCEDURE KillStackAddress (s: StackOfAddress) : StackOfAddress ;
(*
PushAddress - pushes a word, w, onto, s.
*)
PROCEDURE PushAddress (s: StackOfAddress; w: ADDRESS) ;
(*
PopAddress - pops an element from stack, s.
*)
PROCEDURE PopAddress (s: StackOfAddress) : ADDRESS ;
(*
IsEmptyAddress - returns TRUE if stack, s, is empty.
*)
PROCEDURE IsEmptyAddress (s: StackOfAddress) : BOOLEAN ;
(*
PeepAddress - returns the element at, n, items below in the stack.
Top of stack can be seen via Peep(s, 1)
*)
PROCEDURE PeepAddress (s: StackOfAddress; n: CARDINAL) : ADDRESS ;
(*
ReduceAddress - reduce the stack by n elements.
*)
PROCEDURE ReduceAddress (s: StackOfAddress; n: CARDINAL) ;
(*
NoOfItemsInStack - returns the number of items held in the stack, s.
*)
PROCEDURE NoOfItemsInStackAddress (s: StackOfAddress) : CARDINAL ;
END M2StackAddress.
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