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/*
                 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.
*/


/*** grammar.h --- Grammar transforms frontend.
 *
 ** Author: Steve Folkes <smf@hermes.mod.uk>
 *
 *** Commentary:
 *
 * See the file "grammar.c" for more information.
 *
 *** Change Log:
 * $Log: grammar.h,v $
 * Revision 1.1.1.1  1998/01/17  15:57:46  release
 * First version to be checked into rolling release.
 *
 * Revision 1.2  1994/12/15  09:58:15  smf
 * Brought into line with OSSG C Coding Standards Document, as per
 * "CR94_178.sid+tld-update".
 *
 * Revision 1.1.1.1  1994/07/25  16:04:34  smf
 * Initial import of SID 1.8 non shared files.
 *
**/

/****************************************************************************/

#ifndef H_GRAMMAR
#define H_GRAMMAR

#include "os-interface.h"
#include "entry.h"
#include "entry-list.h"
#include "ostream.h"
#include "table.h"
#include "types.h"

/*--------------------------------------------------------------------------*/

typedef struct GrammarT {
    TableT                      table;
    EntryListT                  entry_list;
    unsigned                    terminal;
    EntryP                      predicate_type;
    EntryP                      predicate_id;
} GrammarT, *GrammarP;

/*--------------------------------------------------------------------------*/

extern void                     grammar_init
        PROTO_S ((GrammarP));
extern TableP                   grammar_table
        PROTO_S ((GrammarP));
extern EntryListP               grammar_entry_list
        PROTO_S ((GrammarP));
extern unsigned                 grammar_max_terminal
        PROTO_S ((GrammarP));
extern unsigned                 grammar_next_terminal
        PROTO_S ((GrammarP));
extern EntryP                   grammar_get_predicate_type
        PROTO_S ((GrammarP));
extern void                     grammar_set_predicate_type
        PROTO_S ((GrammarP, EntryP));
extern EntryP                   grammar_get_predicate_id
        PROTO_S ((GrammarP));
extern void                     grammar_check_complete
        PROTO_S ((GrammarP));
extern void                     grammar_remove_left_recursion
        PROTO_S ((GrammarP));
extern void                     grammar_compute_first_sets
        PROTO_S ((GrammarP));
extern void                     grammar_factor
        PROTO_S ((GrammarP));
extern void                     grammar_simplify
        PROTO_S ((GrammarP));
extern void                     grammar_compute_inlining
        PROTO_S ((GrammarP));
extern void                     grammar_check_collisions
        PROTO_S ((GrammarP));
extern void                     grammar_recompute_alt_names
        PROTO_S ((GrammarP));
extern void                     grammar_compute_mutations
        PROTO_S ((GrammarP));

extern void                     write_grammar
        PROTO_S ((OStreamP, GrammarP));

/*--------------------------------------------------------------------------*/

#ifdef FS_FAST
#define grammar_table(g) (&((g)->table))
#define grammar_entry_list(g) (&((g)->entry_list))
#define grammar_max_terminal(g) ((g)->terminal)
#define grammar_get_predicate_type(g) ((g)->predicate_type)
#define grammar_set_predicate_type(g, t) ((g)->predicate_type = (t))
#define grammar_get_predicate_id(g) ((g)->predicate_id)
#endif /* defined (FS_FAST) */

#endif /* !defined (H_GRAMMAR) */

/*
 * Local variables(smf):
 * eval: (include::add-path-entry "../os-interface" "../library")
 * eval: (include::add-path-entry "../generated")
 * end:
**/