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- /* Print information on generated parser, for bison,
- Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
-
- This file is part of Bison, the GNU Compiler Compiler.
-
- Bison 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 1, or (at your option)
- any later version.
-
- Bison 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 Bison; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include <stdio.h>
- #include "system.h"
- #include "machine.h"
- #include "new.h"
- #include "files.h"
- #include "gram.h"
- #include "state.h"
-
-
- extern char **tags;
- extern int nstates;
- extern short *accessing_symbol;
- extern core **state_table;
- extern shifts **shift_table;
- extern errs **err_table;
- extern reductions **reduction_table;
- extern char *consistent;
- extern char any_conflicts;
- extern char *conflicts;
-
- extern void conflict_log();
- extern void verbose_conflict_log();
- extern void print_reductions();
-
- void print_token();
- void print_state();
- void print_core();
- void print_actions();
-
- void
- terse()
- {
- if (any_conflicts)
- {
- conflict_log();
- }
- }
-
-
- void
- verbose()
- {
- register int i;
-
- if (any_conflicts)
- verbose_conflict_log();
-
- fprintf(foutput, "\n\ntoken types:\n");
- print_token (-1, 0);
- if (translations)
- {
- for (i = 0; i <= max_user_token_number; i++)
- /* Don't mention all the meaningless ones. */
- if (token_translations[i] != 2)
- print_token (i, token_translations[i]);
- }
- else
- for (i = 1; i < ntokens; i++)
- print_token (i, i);
-
- for (i = 0; i < nstates; i++)
- {
- print_state(i);
- }
- }
-
-
- void
- print_token(extnum, token)
- int extnum, token;
- {
- fprintf(foutput, " type %d is %s\n", extnum, tags[token]);
- }
-
-
- void
- print_state(state)
- int state;
- {
- fprintf(foutput, "\n\nstate %d\n\n", state);
- print_core(state);
- print_actions(state);
- }
-
-
- void
- print_core(state)
- int state;
- {
- register int i;
- register int k;
- register int rule;
- register core *statep;
- register short *sp;
- register short *sp1;
-
- statep = state_table[state];
- k = statep->nitems;
-
- if (k == 0) return;
-
- for (i = 0; i < k; i++)
- {
- sp1 = sp = ritem + statep->items[i];
-
- while (*sp > 0)
- sp++;
-
- rule = -(*sp);
- fprintf(foutput, " %s -> ", tags[rlhs[rule]]);
-
- for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
- {
- fprintf(foutput, "%s ", tags[*sp]);
- }
-
- putc('.', foutput);
-
- while (*sp > 0)
- {
- fprintf(foutput, " %s", tags[*sp]);
- sp++;
- }
-
- fprintf (foutput, " (%d)", rule);
- putc('\n', foutput);
- }
-
- putc('\n', foutput);
- }
-
-
- void
- print_actions(state)
- int state;
- {
- register int i;
- register int k;
- register int state1;
- register int symbol;
- register shifts *shiftp;
- register errs *errp;
- register reductions *redp;
- register int rule;
-
- shiftp = shift_table[state];
- redp = reduction_table[state];
- errp = err_table[state];
-
- if (!shiftp && !redp)
- {
- fprintf(foutput, " NO ACTIONS\n");
- return;
- }
-
- if (shiftp)
- {
- k = shiftp->nshifts;
-
- for (i = 0; i < k; i++)
- {
- if (! shiftp->shifts[i]) continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
- /* if (ISVAR(symbol)) break; */
- fprintf(foutput, " %-4s\tshift %d\n", tags[symbol], state1);
- }
-
- if (i > 0)
- putc('\n', foutput);
- }
- else
- {
- i = 0;
- k = 0;
- }
-
- if (errp)
- {
- k = errp->nerrs;
-
- for (i = 0; i < k; i++)
- {
- if (! errp->errs[i]) continue;
- symbol = errp->errs[i];
- fprintf(foutput, " %-4s\terror (nonassociative)\n", tags[symbol]);
- }
-
- if (i > 0)
- putc('\n', foutput);
- }
- else
- {
- i = 0;
- k = 0;
- }
-
- if (consistent[state] && redp)
- {
- rule = redp->rules[0];
- symbol = rlhs[rule];
- fprintf(foutput, " $default\treduce %d (%s)\n\n",
- rule, tags[symbol]);
- }
- else if (redp)
- {
- print_reductions(state);
- }
-
- if (i < k)
- {
- for (; i < k; i++)
- {
- if (! shiftp->shifts[i]) continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
- fprintf(foutput, " %-4s\tgoto %d\n", tags[symbol], state1);
- }
-
- putc('\n', foutput);
- }
- }
-