/* Print information on generated parser, for bison,
- Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
+ Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
+ Free Software Foundation, Inc.
-This file is part of Bison, the GNU Compiler Compiler.
+ 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 2, or (at your option)
-any later version.
+ 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 2, 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.
+ 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. */
+ 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, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
-#include <stdio.h>
#include "system.h"
-#include "machine.h"
-#include "alloc.h"
+#include "quotearg.h"
#include "files.h"
+#include "symtab.h"
#include "gram.h"
+#include "LR0.h"
+#include "lalr.h"
+#include "conflicts.h"
+#include "getargs.h"
#include "state.h"
+#include "reader.h"
+#include "print.h"
+#include "reduce.h"
+#include "closure.h"
+#include "bitset.h"
+
+static bitset shiftset;
+static bitset lookaheadset;
+
+#if 0
+static void
+print_token (int extnum, int token)
+{
+ fprintf (out, _(" type %d is %s\n"), extnum, tags[token]);
+}
+#endif
+
+static inline const char *
+escape (const char *s)
+{
+ return quotearg_n_style (1, escape_quoting_style, s);
+}
+/* Be cautious not to use twice the same slot in a single expression. */
+static inline const char *
+escape2 (const char *s)
+{
+ return quotearg_n_style (2, escape_quoting_style, s);
+}
-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 int final_state;
-
-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 print_grammar();
+\f
+/*--------------------------------.
+| Report information on a state. |
+`--------------------------------*/
-void
-terse()
+static void
+print_core (FILE *out, state_t *state)
{
- if (any_conflicts)
+ int i;
+ item_number_t *sitems = state->items;
+ int snritems = state->nitems;
+
+ /* New experimental feature: if TRACE_FLAGS output all the items of
+ a state, not only its kernel. */
+ if (trace_flag)
{
- conflict_log();
+ closure (sitems, snritems);
+ sitems = itemset;
+ snritems = nritemset;
}
-}
+ if (snritems)
+ {
+ for (i = 0; i < snritems; i++)
+ {
+ item_number_t *sp;
+ item_number_t *sp1;
+ int rule;
-void
-verbose()
-{
- register int i;
+ sp1 = sp = ritem + sitems[i];
- if (any_conflicts)
- verbose_conflict_log();
+ while (*sp >= 0)
+ sp++;
- print_grammar();
+ rule = -(*sp);
+ fprintf (out, " %s -> ", escape (rules[rule].lhs->tag));
- for (i = 0; i < nstates; i++)
- {
- print_state(i);
+ for (sp = rules[rule].rhs; sp < sp1; sp++)
+ fprintf (out, "%s ", escape (symbols[*sp]->tag));
+
+ fputc ('.', out);
+
+ for (/* Nothing */; *sp >= 0; ++sp)
+ fprintf (out, " %s", escape (symbols[*sp]->tag));
+
+ fprintf (out, _(" (rule %d)"), rule - 1);
+ fputc ('\n', out);
+ }
+
+ fputc ('\n', out);
}
}
-void
-print_token(extnum, token)
-int extnum, token;
+static void
+print_shifts (FILE *out, state_t *state)
{
- fprintf(foutput, _(" type %d is %s\n"), extnum, tags[token]);
-}
+ int i;
+ shifts *shiftp = state->shifts;
+ for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
+ if (!SHIFT_IS_DISABLED (shiftp, i))
+ {
+ int state1 = shiftp->shifts[i];
+ token_number_t symbol = states[state1]->accessing_symbol;
+ fprintf (out,
+ _(" %-4s\tshift, and go to state %d\n"),
+ escape (symbols[symbol]->tag), state1);
+ }
-void
-print_state(state)
-int state;
-{
- fprintf(foutput, _("\n\nstate %d\n\n"), state);
- print_core(state);
- print_actions(state);
+ if (i > 0)
+ fputc ('\n', out);
}
-void
-print_core(state)
-int state;
+static void
+print_errs (FILE *out, state_t *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;
+ errs *errp = state->errs;
+ int i;
- for (i = 0; i < k; i++)
- {
- sp1 = sp = ritem + statep->items[i];
+ for (i = 0; i < errp->nerrs; ++i)
+ if (errp->errs[i])
+ fprintf (out, _(" %-4s\terror (nonassociative)\n"),
+ escape (symbols[errp->errs[i]]->tag));
- while (*sp > 0)
- sp++;
+ if (i > 0)
+ fputc ('\n', out);
+}
- rule = -(*sp);
- fprintf(foutput, " %s -> ", tags[rlhs[rule]]);
- for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
- {
- fprintf(foutput, "%s ", tags[*sp]);
- }
+static void
+print_gotos (FILE *out, state_t *state)
+{
+ int i;
+ shifts *shiftp = state->shifts;
- putc('.', foutput);
+ for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
+ /* Skip token shifts. */;
- while (*sp > 0)
- {
- fprintf(foutput, " %s", tags[*sp]);
- sp++;
- }
+ if (i < shiftp->nshifts)
+ {
+ for (; i < shiftp->nshifts; i++)
+ if (!SHIFT_IS_DISABLED (shiftp, i))
+ {
+ int state1 = shiftp->shifts[i];
+ token_number_t symbol = states[state1]->accessing_symbol;
+ fprintf (out, _(" %-4s\tgo to state %d\n"),
+ escape (symbols[symbol]->tag), state1);
+ }
- fprintf (foutput, _(" (rule %d)"), rule);
- putc('\n', foutput);
+ fputc ('\n', out);
}
-
- putc('\n', foutput);
}
-
-void
-print_actions(state)
-int state;
+static void
+print_reductions (FILE *out, state_t *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)
+ int i;
+ shifts *shiftp = state->shifts;
+ reductions *redp = state->reductions;
+ errs *errp = state->errs;
+ int nodefault = 0;
+
+ if (redp->nreds == 0)
+ return;
+
+ if (state->consistent)
{
- if (final_state == state)
- fprintf(foutput, _(" $default\taccept\n"));
- else
- fprintf(foutput, _(" NO ACTIONS\n"));
+ int rule = redp->rules[0];
+ token_number_t symbol = rules[rule].lhs->number;
+ fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"),
+ rule - 1, escape (symbols[symbol]->tag));
return;
}
- if (shiftp)
+ bitset_zero (shiftset);
+
+ for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
+ if (!SHIFT_IS_DISABLED (shiftp, i))
+ {
+ /* if this state has a shift for the error token, don't use a
+ default rule. */
+ if (SHIFT_IS_ERROR (shiftp, i))
+ nodefault = 1;
+ bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
+ }
+
+ for (i = 0; i < errp->nerrs; i++)
+ if (errp->errs[i])
+ bitset_set (shiftset, errp->errs[i]);
+
+ if (state->nlookaheads == 1 && !nodefault)
{
- k = shiftp->nshifts;
+ rule_t *default_rule = LArule[state->lookaheadsp];
- for (i = 0; i < k; i++)
- {
- if (! shiftp->shifts[i]) continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
- /* The following line used to be turned off. */
- if (ISVAR(symbol)) break;
- if (symbol==0) /* I.e. strcmp(tags[symbol],"$")==0 */
- fprintf(foutput, _(" $ \tgo to state %d\n"), state1);
- else
- fprintf(foutput, _(" %-4s\tshift, and go to state %d\n"),
- tags[symbol], state1);
- }
+ bitset_and (lookaheadset, LA[state->lookaheadsp], shiftset);
- if (i > 0)
- putc('\n', foutput);
+ for (i = 0; i < ntokens; i++)
+ if (bitset_test (lookaheadset, i))
+ fprintf (out, _(" %-4s\t[reduce using rule %d (%s)]\n"),
+ escape (symbols[i]->tag),
+ default_rule->number - 1,
+ escape2 (default_rule->lhs->tag));
+
+ fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"),
+ default_rule->number - 1,
+ escape (default_rule->lhs->tag));
}
- else
+ else if (state->nlookaheads >= 1)
{
- i = 0;
- k = 0;
- }
+ int cmax = 0;
+ int default_LA = -1;
+ rule_t *default_rule = NULL;
- if (errp)
- {
- int j, nerrs;
+ if (!nodefault)
+ for (i = 0; i < state->nlookaheads; ++i)
+ {
+ int count = 0;
+ int j;
- nerrs = errp->nerrs;
+ bitset_andn (lookaheadset, LA[state->lookaheadsp + i], shiftset);
- for (j = 0; j < nerrs; j++)
- {
- if (! errp->errs[j]) continue;
- symbol = errp->errs[j];
- fprintf(foutput, _(" %-4s\terror (nonassociative)\n"), tags[symbol]);
- }
+ for (j = 0; j < ntokens; j++)
+ if (bitset_test (lookaheadset, j))
+ count++;
- if (j > 0)
- putc('\n', foutput);
- }
+ if (count > cmax)
+ {
+ cmax = count;
+ default_LA = state->lookaheadsp + i;
+ default_rule = LArule[state->lookaheadsp + i];
+ }
- if (consistent[state] && redp)
- {
- rule = redp->rules[0];
- symbol = rlhs[rule];
- fprintf(foutput, _(" $default\treduce using rule %d (%s)\n\n"),
- rule, tags[symbol]);
- }
- else if (redp)
- {
- print_reductions(state);
- }
+ bitset_or (shiftset, shiftset, lookaheadset);
+ }
- if (i < k)
- {
- for (; i < k; i++)
+ bitset_zero (shiftset);
+
+ for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
+ if (!SHIFT_IS_DISABLED (shiftp, i))
+ bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
+
+ for (i = 0; i < ntokens; i++)
{
- if (! shiftp->shifts[i]) continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
- fprintf(foutput, _(" %-4s\tgo to state %d\n"), tags[symbol], state1);
+ int j;
+ int defaulted = 0;
+ int count = bitset_test (shiftset, i);
+
+ for (j = 0; j < state->nlookaheads; ++j)
+ if (bitset_test (LA[state->lookaheadsp + j], i))
+ {
+ if (count == 0)
+ {
+ if (state->lookaheadsp + j != default_LA)
+ fprintf (out,
+ _(" %-4s\treduce using rule %d (%s)\n"),
+ escape (symbols[i]->tag),
+ LArule[state->lookaheadsp + j]->number - 1,
+ escape2 (LArule[state->lookaheadsp + j]->lhs->tag));
+ else
+ defaulted = 1;
+
+ count++;
+ }
+ else
+ {
+ if (defaulted)
+ fprintf (out,
+ _(" %-4s\treduce using rule %d (%s)\n"),
+ escape (symbols[i]->tag),
+ LArule[default_LA]->number - 1,
+ escape2 (LArule[default_LA]->lhs->tag));
+ defaulted = 0;
+ fprintf (out,
+ _(" %-4s\t[reduce using rule %d (%s)]\n"),
+ escape (symbols[i]->tag),
+ LArule[state->lookaheadsp + j]->number - 1,
+ escape2 (LArule[state->lookaheadsp + j]->lhs->tag));
+ }
+ }
}
- putc('\n', foutput);
+ if (default_LA >= 0)
+ fprintf (out, _(" $default\treduce using rule %d (%s)\n"),
+ default_rule->number - 1,
+ escape (default_rule->lhs->tag));
}
}
-#define END_TEST(end) \
- if (column + strlen(buffer) > (end)) \
- { fprintf (foutput, "%s\n ", buffer); column = 3; buffer[0] = 0; } \
- else
-void
-print_grammar()
+static void
+print_actions (FILE *out, state_t *state)
{
- int i, j;
- short* rule;
+ reductions *redp = state->reductions;
+ shifts *shiftp = state->shifts;
+
+ if (shiftp->nshifts == 0 && redp->nreds == 0)
+ {
+ if (final_state == state->number)
+ fprintf (out, _(" $default\taccept\n"));
+ else
+ fprintf (out, _(" NO ACTIONS\n"));
+ return;
+ }
+
+ print_shifts (out, state);
+ print_errs (out, state);
+ print_reductions (out, state);
+ print_gotos (out, state);
+}
+
+static void
+print_state (FILE *out, state_t *state)
+{
+ fprintf (out, _("state %d"), state->number);
+ fputs ("\n\n", out);
+ print_core (out, state);
+ print_actions (out, state);
+ fputs ("\n\n", out);
+}
+\f
+/*-----------------------------------------.
+| Print information on the whole grammar. |
+`-----------------------------------------*/
+
+#define END_TEST(End) \
+do { \
+ if (column + strlen(buffer) > (End)) \
+ { \
+ fprintf (out, "%s\n ", buffer); \
+ column = 3; \
+ buffer[0] = 0; \
+ } \
+} while (0)
+
+
+static void
+print_grammar (FILE *out)
+{
+ token_number_t i;
+ int j;
+ item_number_t *rule;
char buffer[90];
int column = 0;
/* rule # : LHS -> RHS */
- fputs(_("\nGrammar\n"), foutput);
- for (i = 1; i <= nrules; i++)
- /* Don't print rules disabled in reduce_grammar_tables. */
- if (rlhs[i] >= 0)
- {
- fprintf(foutput, _("rule %-4d %s ->"), i, tags[rlhs[i]]);
- rule = &ritem[rrhs[i]];
- if (*rule > 0)
- while (*rule > 0)
- fprintf(foutput, " %s", tags[*rule++]);
- else
- fputs (_(" /* empty */"), foutput);
- putc('\n', foutput);
- }
-
- /* TERMINAL (type #) : rule #s terminal is on RHS */
- fputs(_("\nTerminals, with rules where they appear\n\n"), foutput);
- fprintf(foutput, "%s (-1)\n", tags[0]);
- if (translations)
+ fprintf (out, "%s\n\n", _("Grammar"));
+ fprintf (out, " %s\n", _("Number, Line, Rule"));
+ for (j = 1; j < nrules + 1; j++)
{
- for (i = 0; i <= max_user_token_number; i++)
- if (token_translations[i] != 2)
- {
- buffer[0] = 0;
- column = strlen (tags[token_translations[i]]);
- fprintf(foutput, "%s", tags[token_translations[i]]);
- END_TEST (50);
- sprintf (buffer, " (%d)", i);
-
- for (j = 1; j <= nrules; j++)
- {
- for (rule = &ritem[rrhs[j]]; *rule > 0; rule++)
- if (*rule == token_translations[i])
- {
- END_TEST (65);
- sprintf (buffer + strlen(buffer), " %d", j);
- break;
- }
- }
- fprintf (foutput, "%s\n", buffer);
- }
+ fprintf (out, _(" %3d %3d %s ->"),
+ j - 1, rules[j].line, escape (rules[j].lhs->tag));
+ rule = rules[j].rhs;
+ if (*rule >= 0)
+ while (*rule >= 0)
+ fprintf (out, " %s", escape (symbols[*rule++]->tag));
+ else
+ fprintf (out, " /* %s */", _("empty"));
+ fputc ('\n', out);
}
- else
- for (i = 1; i < ntokens; i++)
+ fputs ("\n\n", out);
+
+
+ /* TERMINAL (type #) : rule #s terminal is on RHS */
+ fprintf (out, "%s\n\n", _("Terminals, with rules where they appear"));
+ for (i = 0; i < max_user_token_number + 1; i++)
+ if (token_translations[i] != undeftoken->number)
{
buffer[0] = 0;
- column = strlen (tags[i]);
- fprintf(foutput, "%s", tags[i]);
+ column = strlen (escape (symbols[token_translations[i]]->tag));
+ fputs (escape (symbols[token_translations[i]]->tag), out);
END_TEST (50);
sprintf (buffer, " (%d)", i);
- for (j = 1; j <= nrules; j++)
- {
- for (rule = &ritem[rrhs[j]]; *rule > 0; rule++)
- if (*rule == i)
- {
- END_TEST (65);
- sprintf (buffer + strlen(buffer), " %d", j);
- break;
- }
- }
- fprintf (foutput, "%s\n", buffer);
+ for (j = 1; j < nrules + 1; j++)
+ for (rule = rules[j].rhs; *rule >= 0; rule++)
+ if (item_number_as_token_number (*rule) == token_translations[i])
+ {
+ END_TEST (65);
+ sprintf (buffer + strlen (buffer), " %d", j - 1);
+ break;
+ }
+ fprintf (out, "%s\n", buffer);
}
+ fputs ("\n\n", out);
- fputs(_("\nNonterminals, with rules where they appear\n\n"), foutput);
- for (i = ntokens; i <= nsyms - 1; i++)
+
+ fprintf (out, "%s\n\n", _("Nonterminals, with rules where they appear"));
+ for (i = ntokens; i < nsyms; i++)
{
int left_count = 0, right_count = 0;
- for (j = 1; j <= nrules; j++)
+ for (j = 1; j < nrules + 1; j++)
{
- if (rlhs[j] == i)
+ if (rules[j].lhs->number == i)
left_count++;
- for (rule = &ritem[rrhs[j]]; *rule > 0; rule++)
- if (*rule == i)
+ for (rule = rules[j].rhs; *rule >= 0; rule++)
+ if (item_number_as_token_number (*rule) == i)
{
right_count++;
break;
}
buffer[0] = 0;
- fprintf(foutput, "%s", tags[i]);
- column = strlen (tags[i]);
+ fputs (escape (symbols[i]->tag), out);
+ column = strlen (escape (symbols[i]->tag));
sprintf (buffer, " (%d)", i);
END_TEST (0);
if (left_count > 0)
{
END_TEST (50);
- sprintf (buffer + strlen(buffer), _(" on left:"));
+ sprintf (buffer + strlen (buffer), _(" on left:"));
- for (j = 1; j <= nrules; j++)
+ for (j = 1; j < nrules + 1; j++)
{
END_TEST (65);
- if (rlhs[j] == i)
- sprintf (buffer + strlen(buffer), " %d", j);
+ if (rules[j].lhs->number == i)
+ sprintf (buffer + strlen (buffer), " %d", j - 1);
}
}
if (right_count > 0)
{
if (left_count > 0)
- sprintf (buffer + strlen(buffer), ",");
+ sprintf (buffer + strlen (buffer), ",");
END_TEST (50);
- sprintf (buffer + strlen(buffer), _(" on right:"));
- for (j = 1; j <= nrules; j++)
+ sprintf (buffer + strlen (buffer), _(" on right:"));
+ for (j = 1; j < nrules + 1; j++)
{
- for (rule = &ritem[rrhs[j]]; *rule > 0; rule++)
- if (*rule == i)
+ for (rule = rules[j].rhs; *rule >= 0; rule++)
+ if (item_number_as_token_number (*rule) == i)
{
END_TEST (65);
- sprintf (buffer + strlen(buffer), " %d", j);
+ sprintf (buffer + strlen (buffer), " %d", j - 1);
break;
}
}
}
- fprintf (foutput, "%s\n", buffer);
+ fprintf (out, "%s\n", buffer);
}
+ fputs ("\n\n", out);
+}
+\f
+void
+print_results (void)
+{
+ size_t i;
+
+ /* We used to use just .out if SPEC_NAME_PREFIX (-p) was used, but
+ that conflicts with Posix. */
+ FILE *out = xfopen (spec_verbose_file, "w");
+
+ size_t size = obstack_object_size (&output_obstack);
+ fwrite (obstack_finish (&output_obstack), 1, size, out);
+ obstack_free (&output_obstack, NULL);
+
+ if (size)
+ fputs ("\n\n", out);
+
+ reduce_output (out);
+ conflicts_output (out);
+
+ print_grammar (out);
+
+ /* New experimental feature: output all the items of a state, not
+ only its kernel. Requires to run closure, which need memory
+ allocation/deallocation. */
+ if (trace_flag)
+ new_closure (nritems);
+ /* Storage for print_reductions. */
+ shiftset = bitset_create (ntokens, BITSET_FIXED);
+ lookaheadset = bitset_create (ntokens, BITSET_FIXED);
+ for (i = 0; i < nstates; i++)
+ print_state (out, states[i]);
+ bitset_free (shiftset);
+ bitset_free (lookaheadset);
+ if (trace_flag)
+ free_closure ();
+
+ xfclose (out);
}
projects / bison.git / blobdiff