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(* NameKey.def provides a dynamic binary tree name to key.
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 NameKey ;
(*
Title : NameKey.def
Author : Gaius Mulley
System : UNIX (GNU Modula-2)
Date : Mon Apr 23 17:20:48 2001
Last edit : Mon Apr 23 17:20:48 2001
Description: NameKey provides a totally dynamic binary tree name to key
interface for the Modula-2 compiler.
*)
FROM SYSTEM IMPORT ADDRESS ;
EXPORT QUALIFIED Name, NulName,
MakeKey, GetKey, LengthKey, IsKey, WriteKey,
IsSameExcludingCase, KeyToCharStar, makekey,
CharKey ;
CONST
NulName = 0 ; (* No legal name. *)
(* NulName is not present in the Tree *)
TYPE
Name = CARDINAL ;
(*
MakeKey - returns the Key of the symbol, a. If a is not in the
name table then it is added, otherwise the Key of a is returned
directly. Note that the name table has no scope - it merely
presents a more convienient way of expressing strings. By a Key.
These keys last for the duration of compilation.
*)
PROCEDURE MakeKey (a: ARRAY OF CHAR) : Name ;
(*
makekey - returns the Key of the symbol, a. If a is not in the
name table then it is added, otherwise the Key of a is returned
directly. Note that the name table has no scope - it merely
presents a more convienient way of expressing strings. By a Key.
These keys last for the duration of compilation.
*)
PROCEDURE makekey (a: ADDRESS) : Name ;
(*
GetKey - returns the name, a, of the key, key.
*)
PROCEDURE GetKey (key: Name; VAR a: ARRAY OF CHAR) ;
(*
LengthKey - returns the StrLen of a Key.
*)
PROCEDURE LengthKey (Key: Name) : CARDINAL ;
(*
IsKey - returns TRUE if string, a, is currently a key.
*)
PROCEDURE IsKey (a: ARRAY OF CHAR) : BOOLEAN ;
(*
WriteKey - Display the symbol represented by Key.
*)
PROCEDURE WriteKey (key: Name) ;
(*
IsSameExcludingCase - returns TRUE if key1 and key2 are
the same. It is case insensitive.
*)
PROCEDURE IsSameExcludingCase (key1, key2: Name) : BOOLEAN ;
(*
KeyToCharStar - returns the C char * string equivalent for, key.
*)
PROCEDURE KeyToCharStar (key: Name) : ADDRESS ;
(*
CharKey - returns the key[i] character.
*)
PROCEDURE CharKey (key: Name; i: CARDINAL) : CHAR ;
END NameKey.
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