mirror of
https://git.savannah.gnu.org/git/bison.git
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574fb2d568
Use BITSET_EXECUTE. * src/lalr.c (lookaheads_print): Likewise. * src/state.c (state_rule_lookaheads_print): Likewise. * src/print_graph.c (print_core): Likewise. * src/print.c (print_reductions): Likewise. * src/output.c (action_row): Likewise. Use SHIFT_IS_DISABLED, SHIFT_IS_SHIFT and SHIFT_SYMBOL.
478 lines
11 KiB
C
478 lines
11 KiB
C
/* Print information on generated parser, for bison,
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Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
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Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "system.h"
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#include "quotearg.h"
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#include "files.h"
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#include "symtab.h"
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#include "gram.h"
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#include "LR0.h"
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#include "lalr.h"
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#include "conflicts.h"
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#include "getargs.h"
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#include "state.h"
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#include "reader.h"
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#include "print.h"
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#include "reduce.h"
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#include "closure.h"
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#include "bitset.h"
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static bitset shiftset;
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static bitset lookaheadset;
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#if 0
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static void
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print_token (int extnum, int token)
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{
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fprintf (out, _(" type %d is %s\n"), extnum, tags[token]);
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}
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#endif
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/*--------------------------------.
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| Report information on a state. |
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`--------------------------------*/
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static void
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print_core (FILE *out, state_t *state)
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{
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int i;
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item_number_t *sitems = state->items;
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int snritems = state->nitems;
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/* Output all the items of a state, not only its kernel. */
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if (report_flag & report_itemsets)
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{
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closure (sitems, snritems);
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sitems = itemset;
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snritems = nritemset;
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}
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if (snritems)
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{
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for (i = 0; i < snritems; i++)
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{
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item_number_t *sp;
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item_number_t *sp1;
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int rule;
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sp1 = sp = ritem + sitems[i];
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while (*sp >= 0)
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sp++;
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rule = -(*sp);
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fprintf (out, " %s -> ", symbol_tag_get (rules[rule].lhs));
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for (sp = rules[rule].rhs; sp < sp1; sp++)
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fprintf (out, "%s ", symbol_tag_get (symbols[*sp]));
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fputc ('.', out);
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for (/* Nothing */; *sp >= 0; ++sp)
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fprintf (out, " %s", symbol_tag_get (symbols[*sp]));
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/* Display the lookaheads? */
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if (report_flag & report_lookaheads)
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state_rule_lookaheads_print (state, &rules[rule], out);
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fprintf (out, _(" (rule %d)"), rule - 1);
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fputc ('\n', out);
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}
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fputc ('\n', out);
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}
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}
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static void
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print_shifts (FILE *out, state_t *state)
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{
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int i;
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shifts_t *shiftp = state->shifts;
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for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
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if (!SHIFT_IS_DISABLED (shiftp, i))
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{
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state_number_t state1 = shiftp->shifts[i];
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symbol_number_t symbol = states[state1]->accessing_symbol;
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fprintf (out,
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_(" %-4s\tshift, and go to state %d\n"),
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symbol_tag_get (symbols[symbol]), state1);
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}
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if (i > 0)
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fputc ('\n', out);
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}
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static void
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print_errs (FILE *out, state_t *state)
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{
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errs_t *errp = state->errs;
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int i;
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for (i = 0; i < errp->nerrs; ++i)
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if (errp->errs[i])
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fprintf (out, _(" %-4s\terror (nonassociative)\n"),
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symbol_tag_get (symbols[errp->errs[i]]));
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if (i > 0)
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fputc ('\n', out);
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}
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static void
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print_gotos (FILE *out, state_t *state)
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{
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int i;
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shifts_t *shiftp = state->shifts;
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for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
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/* Skip token shifts. */;
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if (i < shiftp->nshifts)
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{
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for (; i < shiftp->nshifts; i++)
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if (!SHIFT_IS_DISABLED (shiftp, i))
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{
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state_number_t state1 = shiftp->shifts[i];
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symbol_number_t symbol = states[state1]->accessing_symbol;
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fprintf (out, _(" %-4s\tgo to state %d\n"),
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symbol_tag_get (symbols[symbol]), state1);
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}
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fputc ('\n', out);
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}
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}
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static void
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print_reductions (FILE *out, state_t *state)
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{
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int i;
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shifts_t *shiftp = state->shifts;
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reductions_t *redp = state->reductions;
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errs_t *errp = state->errs;
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int nodefault = 0;
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if (redp->nreds == 0)
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return;
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if (state->consistent)
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{
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int rule = redp->rules[0];
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symbol_number_t symbol = rules[rule].lhs->number;
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fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"),
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rule - 1, symbol_tag_get (symbols[symbol]));
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return;
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}
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bitset_zero (shiftset);
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for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
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if (!SHIFT_IS_DISABLED (shiftp, i))
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{
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/* if this state has a shift for the error token, don't use a
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default rule. */
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if (SHIFT_IS_ERROR (shiftp, i))
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nodefault = 1;
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bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
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}
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for (i = 0; i < errp->nerrs; i++)
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if (errp->errs[i])
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bitset_set (shiftset, errp->errs[i]);
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if (state->nlookaheads == 1 && !nodefault)
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{
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rule_t *default_rule = state->lookaheads_rule[0];
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bitset_and (lookaheadset, state->lookaheads[0], shiftset);
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BITSET_EXECUTE (lookaheadset, 0, i,
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{
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fprintf (out, _(" %-4s\t[reduce using rule %d (%s)]\n"),
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symbol_tag_get (symbols[i]),
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default_rule->number - 1,
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symbol_tag_get_n (default_rule->lhs, 1));
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});
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fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"),
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default_rule->number - 1,
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symbol_tag_get (default_rule->lhs));
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}
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else if (state->nlookaheads >= 1)
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{
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int cmax = 0;
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int default_LA = -1;
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rule_t *default_rule = NULL;
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if (!nodefault)
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for (i = 0; i < state->nlookaheads; ++i)
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{
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int count = 0;
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bitset_andn (lookaheadset, state->lookaheads[i], shiftset);
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count = bitset_count (lookaheadset);
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if (count > cmax)
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{
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cmax = count;
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default_LA = i;
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default_rule = state->lookaheads_rule[i];
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}
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bitset_or (shiftset, shiftset, lookaheadset);
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}
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bitset_zero (shiftset);
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for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
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if (!SHIFT_IS_DISABLED (shiftp, i))
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bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
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for (i = 0; i < ntokens; i++)
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{
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int j;
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int defaulted = 0;
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int count = bitset_test (shiftset, i);
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for (j = 0; j < state->nlookaheads; ++j)
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if (bitset_test (state->lookaheads[j], i))
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{
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if (count == 0)
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{
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if (j != default_LA)
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fprintf (out,
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_(" %-4s\treduce using rule %d (%s)\n"),
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symbol_tag_get (symbols[i]),
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state->lookaheads_rule[j]->number - 1,
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symbol_tag_get_n (state->lookaheads_rule[j]->lhs, 1));
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else
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defaulted = 1;
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count++;
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}
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else
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{
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if (defaulted)
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fprintf (out,
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_(" %-4s\treduce using rule %d (%s)\n"),
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symbol_tag_get (symbols[i]),
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state->lookaheads_rule[default_LA]->number - 1,
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symbol_tag_get_n (state->lookaheads_rule[default_LA]->lhs, 1));
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defaulted = 0;
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fprintf (out,
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_(" %-4s\t[reduce using rule %d (%s)]\n"),
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symbol_tag_get (symbols[i]),
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state->lookaheads_rule[j]->number - 1,
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symbol_tag_get_n (state->lookaheads_rule[j]->lhs, 1));
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}
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}
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}
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if (default_LA >= 0)
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fprintf (out, _(" $default\treduce using rule %d (%s)\n"),
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default_rule->number - 1,
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symbol_tag_get (default_rule->lhs));
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}
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}
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static void
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print_actions (FILE *out, state_t *state)
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{
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reductions_t *redp = state->reductions;
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shifts_t *shiftp = state->shifts;
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if (shiftp->nshifts == 0 && redp->nreds == 0)
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{
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if (state->number == final_state->number)
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fprintf (out, _(" $default\taccept\n"));
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else
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fprintf (out, _(" NO ACTIONS\n"));
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return;
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}
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print_shifts (out, state);
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print_errs (out, state);
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print_reductions (out, state);
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print_gotos (out, state);
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}
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static void
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print_state (FILE *out, state_t *state)
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{
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fprintf (out, _("state %d"), state->number);
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fputs ("\n\n", out);
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print_core (out, state);
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print_actions (out, state);
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if ((report_flag & report_solved_conflicts)
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&& state->solved_conflicts)
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fputs (state->solved_conflicts, out);
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fputs ("\n\n", out);
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}
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/*-----------------------------------------.
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| Print information on the whole grammar. |
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`-----------------------------------------*/
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#define END_TEST(End) \
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do { \
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if (column + strlen(buffer) > (End)) \
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{ \
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fprintf (out, "%s\n ", buffer); \
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column = 3; \
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buffer[0] = 0; \
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} \
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} while (0)
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static void
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print_grammar (FILE *out)
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{
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symbol_number_t i;
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char buffer[90];
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int column = 0;
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grammar_rules_print (out);
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/* TERMINAL (type #) : rule #s terminal is on RHS */
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fprintf (out, "%s\n\n", _("Terminals, with rules where they appear"));
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for (i = 0; i < max_user_token_number + 1; i++)
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if (token_translations[i] != undeftoken->number)
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{
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const char *tag = symbol_tag_get (symbols[token_translations[i]]);
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rule_number_t r;
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item_number_t *rhsp;
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buffer[0] = 0;
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column = strlen (tag);
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fputs (tag, out);
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END_TEST (50);
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sprintf (buffer, " (%d)", i);
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for (r = 1; r < nrules + 1; r++)
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for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
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if (item_number_as_symbol_number (*rhsp) == token_translations[i])
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{
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END_TEST (65);
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sprintf (buffer + strlen (buffer), " %d", r - 1);
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break;
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}
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fprintf (out, "%s\n", buffer);
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}
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fputs ("\n\n", out);
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fprintf (out, "%s\n\n", _("Nonterminals, with rules where they appear"));
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for (i = ntokens; i < nsyms; i++)
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{
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int left_count = 0, right_count = 0;
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rule_number_t r;
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const char *tag = symbol_tag_get (symbols[i]);
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for (r = 1; r < nrules + 1; r++)
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{
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item_number_t *rhsp;
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if (rules[r].lhs->number == i)
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left_count++;
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for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
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if (item_number_as_symbol_number (*rhsp) == i)
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{
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right_count++;
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break;
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}
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}
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buffer[0] = 0;
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fputs (tag, out);
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column = strlen (tag);
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sprintf (buffer, " (%d)", i);
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END_TEST (0);
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if (left_count > 0)
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{
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END_TEST (50);
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sprintf (buffer + strlen (buffer), _(" on left:"));
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for (r = 1; r < nrules + 1; r++)
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{
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END_TEST (65);
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if (rules[r].lhs->number == i)
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sprintf (buffer + strlen (buffer), " %d", r - 1);
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}
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}
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if (right_count > 0)
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{
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if (left_count > 0)
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sprintf (buffer + strlen (buffer), ",");
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END_TEST (50);
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sprintf (buffer + strlen (buffer), _(" on right:"));
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for (r = 1; r < nrules + 1; r++)
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{
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item_number_t *rhsp;
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for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
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if (item_number_as_symbol_number (*rhsp) == i)
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{
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END_TEST (65);
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sprintf (buffer + strlen (buffer), " %d", r - 1);
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break;
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}
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}
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}
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fprintf (out, "%s\n", buffer);
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}
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fputs ("\n\n", out);
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}
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void
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print_results (void)
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{
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state_number_t i;
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/* We used to use just .out if SPEC_NAME_PREFIX (-p) was used, but
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that conflicts with Posix. */
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FILE *out = xfopen (spec_verbose_file, "w");
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reduce_output (out);
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conflicts_output (out);
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print_grammar (out);
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/* If the whole state item sets, not only the kernels, are wanted,
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`closure' will be run, which needs memory allocation/deallocation. */
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if (report_flag & report_itemsets)
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new_closure (nritems);
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/* Storage for print_reductions. */
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shiftset = bitset_create (ntokens, BITSET_FIXED);
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lookaheadset = bitset_create (ntokens, BITSET_FIXED);
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for (i = 0; i < nstates; i++)
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print_state (out, states[i]);
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bitset_free (shiftset);
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bitset_free (lookaheadset);
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if (report_flag & report_itemsets)
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free_closure ();
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xfclose (out);
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}
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