Formatting change.

[bison.git] / src / print.c

diff --git a/src/print.c b/src/print.c
index 6a302962301e0199b0c25036f71b2a6080873f8f..440b0a8ae7ab200ebcd7f425fe5a456cc5e7a702 100644 (file)
--- a/src/print.c
+++ b/src/print.c
@@ -1,35 +1,44 @@
 /* Print information on generated parser, for bison,
 /* Print information on generated parser, for bison,

-   Copyright 1984, 1986, 1989, 2000, 2001 Free Software Foundation, Inc.
+
+   Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2009
+   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
+   This program is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by
    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.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.

 
 

-   Bison is distributed in the hope that it will be useful,
+   This program 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
    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, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 

+#include <config.h>

 #include "system.h"
 #include "system.h"

-#include "files.h"
-#include "gram.h"
+
+#include <bitset.h>
+#include <quotearg.h>
+

 #include "LR0.h"
 #include "LR0.h"

-#include "lalr.h"
+#include "closure.h"

 #include "conflicts.h"
 #include "conflicts.h"

+#include "files.h"

 #include "getargs.h"
 #include "getargs.h"

-#include "state.h"
-#include "reader.h"
+#include "gram.h"
+#include "lalr.h"

 #include "print.h"
 #include "print.h"

+#include "reader.h"

 #include "reduce.h"
 #include "reduce.h"

+#include "state.h"
+#include "symtab.h"
+#include "tables.h"
+
+static bitset no_reduce_set;

 
 #if 0
 static void
 
 #if 0
 static void


@@ -40,231 +49,389 @@ print_token (int extnum, int token)
 #endif
 
 \f
 #endif
 
 \f

+
+/*---------------------------------------.
+| *WIDTH := max (*WIDTH, strlen (STR)).  |
+`---------------------------------------*/
+
+static void
+max_length (size_t *width, const char *str)
+{
+  size_t len = strlen (str);
+  if (len > *width)
+    *width = len;
+}
+

 /*--------------------------------.
 | Report information on a state.  |
 `--------------------------------*/
 
 static void
 /*--------------------------------.
 | Report information on a state.  |
 `--------------------------------*/
 
 static void

-print_core (FILE *out, int state)
+print_core (FILE *out, state *s)

 {
 {

-  int i;
-  core *statep = state_table[state].state;
+  size_t i;
+  item_number *sitems = s->items;
+  size_t snritems = s->nitems;
+  symbol *previous_lhs = NULL;
+
+  /* Output all the items of a state, not only its kernel.  */
+  if (report_flag & report_itemsets)
+    {
+      closure (sitems, snritems);
+      sitems = itemset;
+      snritems = nitemset;
+    }

 
 

-  if (!statep->nitems)
+  if (!snritems)

     return;
 
     return;
 

-  for (i = 0; i < statep->nitems; i++)
+  fputc ('\n', out);
+
+  for (i = 0; i < snritems; i++)

     {
     {

-      short *sp;
-      short *sp1;
-      int rule;
+      item_number *sp;
+      item_number *sp1;
+      rule_number r;

 
 

-      sp1 = sp = ritem + statep->items[i];
+      sp1 = sp = ritem + sitems[i];

 
 

-      while (*sp > 0)
+      while (*sp >= 0)

        sp++;
 
        sp++;
 

-      rule = -(*sp);
-      fprintf (out, "    %s  ->  ", tags[rule_table[rule].lhs]);
+      r = item_number_as_rule_number (*sp);

 
 

-      for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++)
-       fprintf (out, "%s ", tags[*sp]);
+      rule_lhs_print (&rules[r], previous_lhs, out);
+      previous_lhs = rules[r].lhs;

 
 

-      fputc ('.', out);
+      for (sp = rules[r].rhs; sp < sp1; sp++)
+       fprintf (out, " %s", symbols[*sp]->tag);
+      fputs (" .", out);
+      for (/* Nothing */; *sp >= 0; ++sp)
+       fprintf (out, " %s", symbols[*sp]->tag);

 
 

-      for (/* Nothing */; *sp > 0; ++sp)
-       fprintf (out, " %s", tags[*sp]);
+      /* Display the lookahead tokens?  */
+      if (report_flag & report_lookahead_tokens
+          && item_number_is_rule_number (*sp1))
+       state_rule_lookahead_tokens_print (s, &rules[r], out);

 
 

-      fprintf (out, _("   (rule %d)"), rule);

       fputc ('\n', out);
     }
       fputc ('\n', out);
     }

+}
+
+
+/*------------------------------------------------------------.
+| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of S on |
+| OUT.                                                        |
+`------------------------------------------------------------*/
+
+static void
+print_transitions (state *s, FILE *out, bool display_transitions_p)
+{
+  transitions *trans = s->transitions;
+  size_t width = 0;
+  int i;
+
+  /* Compute the width of the lookahead token column.  */
+  for (i = 0; i < trans->num; i++)
+    if (!TRANSITION_IS_DISABLED (trans, i)
+       && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
+      {
+       symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+       max_length (&width, sym->tag);
+      }
+
+  /* Nothing to report. */
+  if (!width)
+    return;

 
   fputc ('\n', out);
 
   fputc ('\n', out);

+  width += 2;
+
+  /* Report lookahead tokens and shifts.  */
+  for (i = 0; i < trans->num; i++)
+    if (!TRANSITION_IS_DISABLED (trans, i)
+       && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
+      {
+       symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+       const char *tag = sym->tag;
+       state *s1 = trans->states[i];
+       int j;
+
+       fprintf (out, "    %s", tag);
+       for (j = width - strlen (tag); j > 0; --j)
+         fputc (' ', out);
+       if (display_transitions_p)
+         fprintf (out, _("shift, and go to state %d\n"), s1->number);
+       else
+         fprintf (out, _("go to state %d\n"), s1->number);
+      }

 }
 
 }
 

+
+/*--------------------------------------------------------.
+| Report the explicit errors of S raised from %nonassoc.  |
+`--------------------------------------------------------*/
+

 static void
 static void

-print_actions (FILE *out, int state)
+print_errs (FILE *out, state *s)

 {
 {

+  errs *errp = s->errs;
+  size_t width = 0;

   int i;
   int i;

-  int k;

 
 

-  shifts   *shiftp = state_table[state].shift_table;
-  reductions *redp = state_table[state].reduction_table;
-  errs       *errp = err_table[state];
+  /* Compute the width of the lookahead token column.  */
+  for (i = 0; i < errp->num; ++i)
+    if (errp->symbols[i])
+      max_length (&width, errp->symbols[i]->tag);

 
 

-  if (!shiftp && !redp)
-    {
-      if (final_state == state)
-       fprintf (out, _("    $default\taccept\n"));
-      else
-       fprintf (out, _("    NO ACTIONS\n"));
-      return;
-    }
+  /* Nothing to report. */
+  if (!width)
+    return;

 
 

-  if (shiftp)
-    {
-      k = shiftp->nshifts;
+  fputc ('\n', out);
+  width += 2;

 
 

-      for (i = 0; i < k; i++)
-       {
-         int symbol;
-         int state1 = shiftp->shifts[i];
-         if (!state1)
-           continue;
-         symbol = state_table[state1].accessing_symbol;
-         /* The following line used to be turned off.  */
-         if (ISVAR (symbol))
-           break;
-         if (symbol == 0)      /* I.e. strcmp(tags[symbol],"$")==0 */
-           fprintf (out,
-                    _("    $   \tgo to state %d\n"), state1);
-         else
-           fprintf (out,
-                    _("    %-4s\tshift, and go to state %d\n"),
-                    tags[symbol], state1);
-       }
+  /* Report lookahead tokens and errors.  */
+  for (i = 0; i < errp->num; ++i)
+    if (errp->symbols[i])
+      {
+       const char *tag = errp->symbols[i]->tag;
+       int j;
+       fprintf (out, "    %s", tag);
+       for (j = width - strlen (tag); j > 0; --j)
+         fputc (' ', out);
+       fputs (_("error (nonassociative)\n"), out);
+      }
+}

 
 

-      if (i > 0)
-       fputc ('\n', out);
-    }
+
+/*-------------------------------------------------------------------------.
+| Report a reduction of RULE on LOOKAHEAD_TOKEN (which can be `default').  |
+| If not ENABLED, the rule is masked by a shift or a reduce (S/R and       |
+| R/R conflicts).                                                          |
+`-------------------------------------------------------------------------*/
+
+static void
+print_reduction (FILE *out, size_t width,
+                const char *lookahead_token,
+                rule *r, bool enabled)
+{
+  int j;
+  fprintf (out, "    %s", lookahead_token);
+  for (j = width - strlen (lookahead_token); j > 0; --j)
+    fputc (' ', out);
+  if (!enabled)
+    fputc ('[', out);
+  if (r->number)
+    fprintf (out, _("reduce using rule %d (%s)"), r->number, r->lhs->tag);

   else
   else

-    {
-      i = 0;
-      k = 0;
-    }
+    fprintf (out, _("accept"));
+  if (!enabled)
+    fputc (']', out);
+  fputc ('\n', out);
+}

 
 

-  if (errp)
-    {
-      int j;
-      for (j = 0; j < errp->nerrs; j++)
-       {
-         int symbol = errp->errs[j];
-         if (!symbol)
-           continue;
-         fprintf (out, _("    %-4s\terror (nonassociative)\n"),
-                  tags[symbol]);
-       }

 
 

-      if (j > 0)
-       fputc ('\n', out);
-    }
+/*-------------------------------------------.
+| Report on OUT the reduction actions of S.  |
+`-------------------------------------------*/

 
 

-  if (state_table[state].consistent && redp)
-    {
-      int rule = redp->rules[0];
-      int symbol = rule_table[rule].lhs;
-      fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),
-              rule, tags[symbol]);
-    }
-  else if (redp)
-    {
-      print_reductions (out, state);
-    }
+static void
+print_reductions (FILE *out, state *s)
+{
+  transitions *trans = s->transitions;
+  reductions *reds = s->reductions;
+  rule *default_rule = NULL;
+  size_t width = 0;
+  int i, j;

 
 

-  if (i < k)
-    {
-      for (; i < k; i++)
-       {
-         int symbol;
-         int state1 = shiftp->shifts[i];
-         if (!state1)
-           continue;
-         symbol = state_table[state1].accessing_symbol;
-         fprintf (out, _("    %-4s\tgo to state %d\n"),
-                  tags[symbol], state1);
-       }
+  if (reds->num == 0)
+    return;

 
 

-      fputc ('\n', out);
-    }
+  if (yydefact[s->number] != 0)
+    default_rule = &rules[yydefact[s->number] - 1];
+
+  bitset_zero (no_reduce_set);
+  FOR_EACH_SHIFT (trans, i)
+    bitset_set (no_reduce_set, TRANSITION_SYMBOL (trans, i));
+  for (i = 0; i < s->errs->num; ++i)
+    if (s->errs->symbols[i])
+      bitset_set (no_reduce_set, s->errs->symbols[i]->number);
+
+  /* Compute the width of the lookahead token column.  */
+  if (default_rule)
+    width = strlen (_("$default"));
+
+  if (reds->lookahead_tokens)
+    for (i = 0; i < ntokens; i++)
+      {
+       bool count = bitset_test (no_reduce_set, i);
+
+       for (j = 0; j < reds->num; ++j)
+         if (bitset_test (reds->lookahead_tokens[j], i))
+           {
+             if (! count)
+               {
+                 if (reds->rules[j] != default_rule)
+                   max_length (&width, symbols[i]->tag);
+                 count = true;
+               }
+             else
+               {
+                 max_length (&width, symbols[i]->tag);
+               }
+           }
+      }
+
+  /* Nothing to report. */
+  if (!width)
+    return;
+
+  fputc ('\n', out);
+  width += 2;
+
+  /* Report lookahead tokens (or $default) and reductions.  */
+  if (reds->lookahead_tokens)
+    for (i = 0; i < ntokens; i++)
+      {
+       bool defaulted = false;
+       bool count = bitset_test (no_reduce_set, i);
+
+       for (j = 0; j < reds->num; ++j)
+         if (bitset_test (reds->lookahead_tokens[j], i))
+           {
+             if (! count)
+               {
+                 if (reds->rules[j] != default_rule)
+                   print_reduction (out, width,
+                                    symbols[i]->tag,
+                                    reds->rules[j], true);
+                 else
+                   defaulted = true;
+                 count = true;
+               }
+             else
+               {
+                 if (defaulted)
+                   print_reduction (out, width,
+                                    symbols[i]->tag,
+                                    default_rule, true);
+                 defaulted = false;
+                 print_reduction (out, width,
+                                  symbols[i]->tag,
+                                  reds->rules[j], false);
+               }
+           }
+      }
+
+  if (default_rule)
+    print_reduction (out, width,
+                    _("$default"), default_rule, true);

 }
 
 }
 

+
+/*--------------------------------------------------------------.
+| Report on OUT all the actions (shifts, gotos, reductions, and |
+| explicit erros from %nonassoc) of S.                          |
+`--------------------------------------------------------------*/
+

 static void
 static void

-print_state (FILE *out, int state)
+print_actions (FILE *out, state *s)
+{
+  /* Print shifts.  */
+  print_transitions (s, out, true);
+  print_errs (out, s);
+  print_reductions (out, s);
+  /* Print gotos.  */
+  print_transitions (s, out, false);
+}
+
+
+/*----------------------------------.
+| Report all the data on S on OUT.  |
+`----------------------------------*/
+
+static void
+print_state (FILE *out, state *s)

 {
   fputs ("\n\n", out);
 {
   fputs ("\n\n", out);

-  fprintf (out, _("state %d"), state);
-  fputs ("\n\n", out);
-  print_core (out, state);
-  print_actions (out, state);
+  fprintf (out, _("state %d"), s->number);
+  fputc ('\n', out);
+  print_core (out, s);
+  print_actions (out, s);
+  if ((report_flag & report_solved_conflicts) && s->solved_conflicts)
+    {
+      fputc ('\n', out);
+      fputs (s->solved_conflicts, out);
+    }

 }
 \f
 /*-----------------------------------------.
 | Print information on the whole grammar.  |
 `-----------------------------------------*/
 
 }
 \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)
+#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)
 {
 
 
 static void
 print_grammar (FILE *out)
 {

-  int i, j;
-  short *rule;
+  symbol_number i;

   char buffer[90];
   int column = 0;
 
   char buffer[90];
   int column = 0;
 

-  /* rule # : LHS -> RHS */
-  fprintf (out, "\n%s\n\n", _("Grammar"));
-  fprintf (out, "  %s\n", _("Number, Line, Rule"));
-  for (i = 1; i <= nrules; i++)
-    /* Don't print rules disabled in reduce_grammar_tables.  */
-    if (rule_table[i].lhs >= 0)
-      {
-       fprintf (out, _("  %3d %3d %s ->"),
-                i, rule_table[i].line, tags[rule_table[i].lhs]);
-       rule = &ritem[rule_table[i].rhs];
-       if (*rule > 0)
-         while (*rule > 0)
-           fprintf (out, " %s", tags[*rule++]);
-       else
-         fprintf (out, " /* %s */", _("empty"));
-       fputc ('\n', out);
-      }
+  grammar_rules_print (out);

 
   /* TERMINAL (type #) : rule #s terminal is on RHS */
 
   /* TERMINAL (type #) : rule #s terminal is on RHS */

-  fprintf (out, "\n%s\n\n", _("Terminals, with rules where they appear"));
-  fprintf (out, "%s (-1)\n", tags[0]);
-
-  for (i = 0; i <= max_user_token_number; i++)
-    if (token_translations[i] != 2)
+  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)

       {
       {

+       const char *tag = symbols[token_translations[i]]->tag;
+       rule_number r;
+       item_number *rhsp;
+

        buffer[0] = 0;
        buffer[0] = 0;

-       column = strlen (tags[token_translations[i]]);
-       fputs (tags[token_translations[i]], out);
-       END_TEST (50);
+       column = strlen (tag);
+       fputs (tag, out);
+       END_TEST (65);

        sprintf (buffer, " (%d)", i);
 
        sprintf (buffer, " (%d)", i);
 

-       for (j = 1; j <= nrules; j++)
-         for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
-           if (*rule == token_translations[i])
+       for (r = 0; r < nrules; r++)
+         for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+           if (item_number_as_symbol_number (*rhsp) == token_translations[i])

              {
                END_TEST (65);
              {
                END_TEST (65);

-               sprintf (buffer + strlen (buffer), " %d", j);
+               sprintf (buffer + strlen (buffer), " %d", r);

                break;
              }
        fprintf (out, "%s\n", buffer);
       }
                break;
              }
        fprintf (out, "%s\n", buffer);
       }

+  fputs ("\n\n", out);
+

 
 

-  fprintf (out, "\n%s\n\n",
-          _("Nonterminals, with rules where they appear"));
-  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;
     {
       int left_count = 0, right_count = 0;

+      rule_number r;
+      const char *tag = symbols[i]->tag;

 
 

-      for (j = 1; j <= nrules; j++)
+      for (r = 0; r < nrules; r++)

        {
        {

-         if (rule_table[j].lhs == i)
+         item_number *rhsp;
+         if (rules[r].lhs->number == i)

            left_count++;
            left_count++;

-         for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
-           if (*rule == i)
+         for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+           if (item_number_as_symbol_number (*rhsp) == i)

              {
                right_count++;
                break;
              {
                right_count++;
                break;


@@ -272,21 +439,23 @@ print_grammar (FILE *out)
        }
 
       buffer[0] = 0;
        }
 
       buffer[0] = 0;

-      fputs (tags[i], out);
-      column = strlen (tags[i]);
+      fputs (tag, out);
+      column = strlen (tag);

       sprintf (buffer, " (%d)", i);
       END_TEST (0);
 
       if (left_count > 0)
        {
       sprintf (buffer, " (%d)", i);
       END_TEST (0);
 
       if (left_count > 0)
        {

-         END_TEST (50);
+         END_TEST (65);

          sprintf (buffer + strlen (buffer), _(" on left:"));
 
          sprintf (buffer + strlen (buffer), _(" on left:"));
 

-         for (j = 1; j <= nrules; j++)
+         for (r = 0; r < nrules; r++)

            {
            {

-             END_TEST (65);
-             if (rule_table[j].lhs == i)
-               sprintf (buffer + strlen (buffer), " %d", j);
+             if (rules[r].lhs->number == i)
+               {
+                 END_TEST (65);
+                 sprintf (buffer + strlen (buffer), " %d", r);
+               }

            }
        }
 
            }
        }
 


@@ -294,15 +463,16 @@ print_grammar (FILE *out)
        {
          if (left_count > 0)
            sprintf (buffer + strlen (buffer), ",");
        {
          if (left_count > 0)
            sprintf (buffer + strlen (buffer), ",");

-         END_TEST (50);
+         END_TEST (65);

          sprintf (buffer + strlen (buffer), _(" on right:"));
          sprintf (buffer + strlen (buffer), _(" on right:"));

-         for (j = 1; j <= nrules; j++)
+         for (r = 0; r < nrules; r++)

            {
            {

-             for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
-               if (*rule == i)
+             item_number *rhsp;
+             for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+               if (item_number_as_symbol_number (*rhsp) == i)

                  {
                    END_TEST (65);
                  {
                    END_TEST (65);

-                   sprintf (buffer + strlen (buffer), " %d", j);
+                   sprintf (buffer + strlen (buffer), " %d", r);

                    break;
                  }
            }
                    break;
                  }
            }


@@ -314,26 +484,31 @@ print_grammar (FILE *out)
 void
 print_results (void)
 {
 void
 print_results (void)
 {

-  if (verbose_flag)
-    {
-      int 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);
-
-      reduce_output (out);
-      conflicts_output (out);
-
-      print_grammar (out);
-
-      for (i = 0; i < nstates; i++)
-       print_state (out, i);
-
-      xfclose (out);
-    }
-  obstack_free (&output_obstack, NULL);
+  state_number 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");
+
+  reduce_output (out);
+  grammar_rules_partial_print (out,
+                              _("Rules useless in parser due to conflicts"),
+                                 rule_useless_in_parser_p);
+  conflicts_output (out);
+
+  print_grammar (out);
+
+  /* If the whole state item sets, not only the kernels, are wanted,
+     `closure' will be run, which needs memory allocation/deallocation.   */
+  if (report_flag & report_itemsets)
+    new_closure (nritems);
+  /* Storage for print_reductions.  */
+  no_reduce_set =  bitset_create (ntokens, BITSET_FIXED);
+  for (i = 0; i < nstates; i++)
+    print_state (out, states[i]);
+  bitset_free (no_reduce_set);
+  if (report_flag & report_itemsets)
+    free_closure ();
+
+  xfclose (out);

 }
 }