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78af9bbcd3
`spec_file_prefix', declared by src/files.h. * src/files.c, src/files.h: Default for spec_name_prefix is "yy". * src/muscle_tab.c (muscle_init): Default prefix to NULL. * src/output.c (prepare): Adjust. * src/reader.c (symbols_output): Likewise. * src/vmsgetargs.c: Vaguely adjust, but who cares?
349 lines
7.9 KiB
C
349 lines
7.9 KiB
C
/* Print information on generated parser, for bison,
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Copyright 1984, 1986, 1989, 2000, 2001 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 "files.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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#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, int state)
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{
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int i;
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short *sitems = state_table[state]->items;
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int snitems = state_table[state]->nitems;
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/* New experimental feature: if TRACE_FLAGS output all the items of
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a state, not only its kernel. */
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if (trace_flag)
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{
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closure (sitems, snitems);
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sitems = itemset;
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snitems = nitemset;
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}
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if (snitems)
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{
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for (i = 0; i < snitems; i++)
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{
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short *sp;
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short *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 -> ", tags[rule_table[rule].lhs]);
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for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++)
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fprintf (out, "%s ", tags[*sp]);
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fputc ('.', out);
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for (/* Nothing */; *sp > 0; ++sp)
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fprintf (out, " %s", tags[*sp]);
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fprintf (out, _(" (rule %d)"), rule);
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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_actions (FILE *out, int state)
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{
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int i;
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shifts *shiftp = state_table[state]->shifts;
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reductions *redp = state_table[state]->reductions;
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errs *errp = state_table[state]->errs;
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if (!shiftp->nshifts && !redp)
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{
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if (final_state == state)
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fprintf (out, _(" $default\taccept\n"));
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else
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fprintf (out, _(" NO ACTIONS\n"));
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return;
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}
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for (i = 0; i < shiftp->nshifts; i++)
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if (!SHIFT_IS_DISABLED (shiftp, i))
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{
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int state1 = shiftp->shifts[i];
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int symbol = state_table[state1]->accessing_symbol;
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/* The following line used to be turned off. */
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if (ISVAR (symbol))
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break;
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if (symbol == 0) /* I.e. strcmp(tags[symbol],"$")==0 */
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fprintf (out,
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_(" $ \tgo to state %d\n"), state1);
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else
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fprintf (out,
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_(" %-4s\tshift, and go to state %d\n"),
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tags[symbol], state1);
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}
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if (i > 0)
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fputc ('\n', out);
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if (errp)
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{
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int j;
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for (j = 0; j < errp->nerrs; j++)
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{
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int symbol = errp->errs[j];
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if (!symbol)
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continue;
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fprintf (out, _(" %-4s\terror (nonassociative)\n"),
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tags[symbol]);
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}
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if (j > 0)
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fputc ('\n', out);
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}
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if (state_table[state]->consistent && redp)
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{
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int rule = redp->rules[0];
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int symbol = rule_table[rule].lhs;
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fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"),
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rule, tags[symbol]);
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}
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else if (redp)
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{
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print_reductions (out, state);
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}
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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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int state1 = shiftp->shifts[i];
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int symbol = state_table[state1]->accessing_symbol;
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fprintf (out, _(" %-4s\tgo to state %d\n"),
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tags[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_state (FILE *out, int state)
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{
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fprintf (out, _("state %d"), state);
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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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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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int i, j;
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short *rule;
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char buffer[90];
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int column = 0;
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/* rule # : LHS -> RHS */
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fprintf (out, "%s\n\n", _("Grammar"));
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fprintf (out, " %s\n", _("Number, Line, Rule"));
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for (i = 1; i <= nrules; i++)
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/* Don't print rules disabled in reduce_grammar_tables. */
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if (rule_table[i].useful)
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{
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fprintf (out, _(" %3d %3d %s ->"),
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i, rule_table[i].line, tags[rule_table[i].lhs]);
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rule = &ritem[rule_table[i].rhs];
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if (*rule > 0)
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while (*rule > 0)
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fprintf (out, " %s", tags[*rule++]);
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else
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fprintf (out, " /* %s */", _("empty"));
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fputc ('\n', out);
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}
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fputs ("\n\n", 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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fprintf (out, "%s (-1)\n", tags[0]);
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for (i = 0; i <= max_user_token_number; i++)
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if (token_translations[i] != 2)
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{
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buffer[0] = 0;
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column = strlen (tags[token_translations[i]]);
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fputs (tags[token_translations[i]], out);
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END_TEST (50);
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sprintf (buffer, " (%d)", i);
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for (j = 1; j <= nrules; j++)
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for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
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if (*rule == token_translations[i])
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{
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END_TEST (65);
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sprintf (buffer + strlen (buffer), " %d", j);
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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 - 1; i++)
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{
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int left_count = 0, right_count = 0;
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for (j = 1; j <= nrules; j++)
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{
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if (rule_table[j].lhs == i)
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left_count++;
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for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
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if (*rule == 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 (tags[i], out);
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column = strlen (tags[i]);
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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 (j = 1; j <= nrules; j++)
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{
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END_TEST (65);
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if (rule_table[j].lhs == i)
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sprintf (buffer + strlen (buffer), " %d", j);
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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 (j = 1; j <= nrules; j++)
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{
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for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
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if (*rule == i)
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{
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END_TEST (65);
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sprintf (buffer + strlen (buffer), " %d", j);
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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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if (verbose_flag)
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{
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int 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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size_t size = obstack_object_size (&output_obstack);
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fwrite (obstack_finish (&output_obstack), 1, size, out);
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if (size)
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fputs ("\n\n", out);
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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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/* New experimental feature: output all the items of a state,
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not only its kernel. Requires to run closure, which need
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memory allocation/deallocation. */
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if (trace_flag)
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new_closure (nitems);
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for (i = 0; i < nstates; i++)
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print_state (out, i);
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if (trace_flag)
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free_closure ();
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xfclose (out);
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}
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obstack_free (&output_obstack, NULL);
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}
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