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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.
*/


/*** basic.c --- Basic ADT.
 *
 ** Author: Steve Folkes <smf@hermes.mod.uk>
 *
 *** Commentary:
 *
 * This file implements the basic manipulation routines.
 *
 *** Change Log:
 * $Log: basic.c,v $
 * Revision 1.1.1.1  1998/01/17  15:57:45  release
 * First version to be checked into rolling release.
 *
 * Revision 1.2  1994/12/15  09:58:01  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  16:04:31  smf
 * Initial import of SID 1.8 non shared files.
 *
**/

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

#include "basic.h"
#include "action.h"
#include "grammar.h"
#include "name.h"
#include "rstack.h"
#include "rule.h"
#include "type.h"

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

BasicP
basic_create PROTO_N ((grammar, ignored))
             PROTO_T (GrammarP grammar X
                      BoolT    ignored)
{
    BasicP basic = ALLOCATE (BasicT);

    basic->terminal        = grammar_next_terminal (grammar);
    types_init (basic_result (basic));
    basic->result_code     = NIL (GenericP);
    basic->ignored         = ignored;
    return (basic);
}

#ifdef FS_FAST
#undef basic_terminal
#endif /* defined (FS_FAST) */
unsigned
basic_terminal PROTO_N ((basic))
               PROTO_T (BasicP basic)
{
    return (basic->terminal);
}
#ifdef FS_FAST
#define basic_terminal(b) ((b)->terminal)
#endif /* defined (FS_FAST) */

#ifdef FS_FAST
#undef basic_result
#endif /* defined (FS_FAST) */
TypeTupleP
basic_result PROTO_N ((basic))
             PROTO_T (BasicP basic)
{
    return (&(basic->result));
}
#ifdef FS_FAST
#define basic_result(b) (&((b)->result))
#endif /* defined (FS_FAST) */

#ifdef FS_FAST
#undef basic_get_result_code
#endif /* defined (FS_FAST) */
GenericP
basic_get_result_code PROTO_N ((basic))
                      PROTO_T (BasicP basic)
{
    return (basic->result_code);
}
#ifdef FS_FAST
#define basic_get_result_code(b) ((b)->result_code)
#endif /* defined (FS_FAST) */

#ifdef FS_FAST
#undef basic_set_result_code
#endif /* defined (FS_FAST) */
void
basic_set_result_code PROTO_N ((basic, code))
                      PROTO_T (BasicP   basic X
                               GenericP code)
{
    basic->result_code = code;
}
#ifdef FS_FAST
#define basic_set_result_code(b, c) ((b)->result_code = (c))
#endif /* defined (FS_FAST) */

#ifdef FS_FAST
#undef basic_get_ignored
#endif /* defined (FS_FAST) */
BoolT
basic_get_ignored PROTO_N ((basic))
                  PROTO_T (BasicP basic)
{
    return (basic->ignored);
}
#ifdef FS_FAST
#define basic_get_ignored(b) ((b)->ignored)
#endif /* defined (FS_FAST) */

void
basic_iter_for_table PROTO_N ((basic, full, proc, closure))
                     PROTO_T (BasicP   basic X
                              BoolT    full X
                              void   (*proc) PROTO_S ((EntryP, GenericP)) X
                              GenericP closure)
{
    if (full) {
        types_iter_for_table (basic_result (basic), proc, closure);
    }
}

void
write_basics PROTO_N ((ostream, closure))
             PROTO_T (OStreamP      ostream X
                      BasicClosureP closure)
{
    BitVecP  bitvec   = closure->bitvec;
    TableP   table    = grammar_table (closure->grammar);
    unsigned terminal = bitvec_first_bit (bitvec);
    unsigned num_bits = bitvec_num_bits (bitvec);

    while (num_bits) {
        EntryP entry = table_get_basic_by_number (table, terminal);

        if (entry) {
            write_char (ostream, '\'');
            write_key (ostream, entry_key (entry));
            write_char (ostream, '\'');
        } else {
            write_unsigned (ostream, terminal);
        }
        if (num_bits > 2) {
            write_cstring (ostream, ", ");
        } else if (num_bits == 2) {
            write_cstring (ostream, " & ");
        }
        num_bits --;
        (void) bitvec_next_bit (bitvec, &terminal);
    }
}

/*
 * Local variables(smf):
 * eval: (include::add-path-entry "../os-interface" "../library")
 * eval: (include::add-path-entry "../generated")
 * end:
**/