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/*
 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of The TenDRA Project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id$
 */
/*
                 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright
    owned by the United Kingdom Secretary of State for Defence
    acting through the Defence Evaluation and Research Agency
    (DERA).  It is made available to Recipients with a
    royalty-free licence for its use, reproduction, transfer
    to other parties and amendment for any purpose not excluding
    product development provided that any such use et cetera
    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is
        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to
        show both the nature of and the organisation responsible
        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another
        party shall be deemed to be that party's acceptance of
        these conditions;

        (4) DERA gives no warranty or assurance as to its
        quality or suitability for any purpose and DERA accepts
        no liability whatsoever in relation to any use to which
        it may be put.
*/


#ifndef HASH_INCLUDED
#define HASH_INCLUDED


/*
    HASH TABLE DECLARATIONS

    The routines in this module are concerned with the look-up of identifiers
    in the hash table.
*/

extern HASHID lookup_name(string, unsigned long, int, int);
extern HASHID lookup_conv(TYPE);
extern HASHID lookup_constr(TYPE, IDENTIFIER);
extern HASHID lookup_destr(TYPE, IDENTIFIER);
extern HASHID lookup_anon(void);
extern HASHID expand_name(HASHID, CLASS_TYPE);
extern HASHID next_expand_name(HASHID);
extern void prime_name(IDENTIFIER);

extern int find_hashid(HASHID);
extern void init_hash(void);
extern IDENTIFIER underlying_id(IDENTIFIER);
extern void set_hashid_loc(IDENTIFIER, IDENTIFIER);
extern unsigned long hash(string);
extern IDENTIFIER underlying_op;
extern HASHID *hash_ops_table;
extern HASHID hash_keyword[];
extern HASHID *hash_table;


/*
    LOOK UP AN OVERLOADED OPERATOR FUNCTION NAME

    This macro returns the hash table entry for the overloaded operator
    function name corresponding to the lexical token number T.  Note that
    the ISO keywords and digraphs have already been mapped onto their
    primary representations.
*/

#define lookup_op(T)            (hash_ops_table[(T)])


/*
    HASH TABLE SIZES

    These macros give the sizes of various hash tables.
*/

#define HASH_SIZE               ((unsigned long)4096)
#define HASH_POWER              ((unsigned long)37)
#define HASH_TYPE_SIZE          ((unsigned long)256)


/*
    KEYWORD HASH TABLE ENTRIES

    The macro KEYWORD gives a convenient method of accessing the table
    hash_keyword.
*/

#define KEYWORD(T)              (hash_keyword[(T) - lex_auto])
#define EQ_KEYWORD(N, T)        EQ_hashid((N), KEYWORD(T))


#endif