m3tk/src/syn/M3CId.m3

MODULE M3CId;
************************************************************************* Copyright (C) Olivetti 1989 All Rights reserved Use and copy of this software and preparation of derivative works based upon this software are permitted to any person, provided this same copyright notice and the following Olivetti warranty disclaimer are included in any copy of the software or any modification thereof or derivative work therefrom made by any person. This software is made available AS IS and Olivetti disclaims all warranties with respect to this software, whether expressed or implied under any law, including all implied warranties of merchantibility and fitness for any purpose. In no event shall Olivetti be liable for any damages whatsoever resulting from loss of use, data or profits or otherwise arising out of or in connection with the use or performance of this software. ************************************************************************* 

IMPORT Text;
IMPORT M3CHash, M3CReservedWord;
This implementation uses a global hash table 

VAR
  table_g := M3CReservedWord.New(10240, NewIdCreator());
  atom_g := 0;

PROCEDURE NewId(<*UNUSED*> c: M3CHash.IdCreator;
                <*UNUSED*> text: Text.T): M3CHash.Id RAISES {}=
  BEGIN
    INC(atom_g);
    RETURN NEW(T, atom := atom_g);
  END NewId;

PROCEDURE NewIdCreator(): M3CHash.IdCreator RAISES {}=
  TYPE
    IdCreator = M3CHash.IdCreator OBJECT OVERRIDES new := NewId END;
  BEGIN
    RETURN NEW(IdCreator);
  END NewIdCreator;

<*INLINE*> PROCEDURE Table(): M3CReservedWord.Table RAISES {}=
  BEGIN
    RETURN table_g;
  END Table;

<*INLINE*> PROCEDURE ToText(id: T): Text.T RAISES {}=
  BEGIN
    RETURN id.toText();
  END ToText;

<*INLINE*> PROCEDURE Enter(text: Text.T): T RAISES {}=
  BEGIN
    RETURN table_g.enter(text);
  END Enter;

<*INLINE*> PROCEDURE Lookup(text: Text.T; VAR id: T): BOOLEAN RAISES {}=
  VAR
    hashId: M3CHash.Id;
  BEGIN
    IF table_g.lookup(text, hashId) THEN
      TYPECASE hashId OF
      | T(ident) => id := ident; RETURN TRUE;
      ELSE
        RETURN FALSE;
      END;
    ELSE
      RETURN FALSE;
    END;
  END Lookup;

BEGIN

END M3CId.