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bison/src/bison/2.4.1/bison-2.4.1-src/src/print.c

Index: bison/src/bison/2.4.1/bison-2.4.1-src/src/print.c
===================================================================
--- bison/src/bison/2.4.1/bison-2.4.1-src/src/print.c	(revision 0)
+++ bison/src/bison/2.4.1/bison-2.4.1-src/src/print.c	(revision 0)
@@ -0,0 +1,514 @@
+/* Print information on generated parser, for bison,
+
+   Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002, 2003, 2004, 2005, 2007
+   Free Software Foundation, Inc.
+
+   This file is part of Bison, the GNU Compiler Compiler.
+
+   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
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   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
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+#include "system.h"
+
+#include <bitset.h>
+#include <quotearg.h>
+
+#include "LR0.h"
+#include "closure.h"
+#include "conflicts.h"
+#include "files.h"
+#include "getargs.h"
+#include "gram.h"
+#include "lalr.h"
+#include "print.h"
+#include "reader.h"
+#include "reduce.h"
+#include "state.h"
+#include "symtab.h"
+#include "tables.h"
+
+static bitset no_reduce_set;
+
+#if 0
+static void
+print_token (int extnum, int token)
+{
+  fprintf (out, _(" type %d is %s\n"), extnum, tags[token]);
+}
+#endif
+
+
+
+/*---------------------------------------.
+| *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
+print_core (FILE *out, state *s)
+{
+  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 (!snritems)
+    return;
+
+  fputc ('\n', out);
+
+  for (i = 0; i < snritems; i++)
+    {
+      item_number *sp;
+      item_number *sp1;
+      rule_number r;
+
+      sp1 = sp = ritem + sitems[i];
+
+      while (*sp >= 0)
+	sp++;
+
+      r = item_number_as_rule_number (*sp);
+
+      rule_lhs_print (&rules[r], previous_lhs, out);
+      previous_lhs = rules[r].lhs;
+
+      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);
+
+      /* 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);
+
+      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);
+  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
+print_errs (FILE *out, state *s)
+{
+  errs *errp = s->errs;
+  size_t width = 0;
+  int i;
+
+  /* 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);
+
+  /* Nothing to report. */
+  if (!width)
+    return;
+
+  fputc ('\n', out);
+  width += 2;
+
+  /* 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);
+      }
+}
+
+
+/*-------------------------------------------------------------------------.
+| 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
+    fprintf (out, _("accept"));
+  if (!enabled)
+    fputc (']', out);
+  fputc ('\n', out);
+}
+
+
+/*-------------------------------------------.
+| Report on OUT the reduction actions of S.  |
+`-------------------------------------------*/
+
+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 (reds->num == 0)
+    return;
+
+  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
+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);
+  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);
+    }
+}
+
+/*-----------------------------------------.
+| 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)
+{
+  symbol_number i;
+  char buffer[90];
+  int column = 0;
+
+  grammar_rules_print (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)
+      {
+	const char *tag = symbols[token_translations[i]]->tag;
+	rule_number r;
+	item_number *rhsp;
+
+	buffer[0] = 0;
+	column = strlen (tag);
+	fputs (tag, out);
+	END_TEST (65);
+	sprintf (buffer, " (%d)", 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);
+		sprintf (buffer + strlen (buffer), " %d", r);
+		break;
+	      }
+	fprintf (out, "%s\n", buffer);
+      }
+  fputs ("\n\n", out);
+
+
+  fprintf (out, "%s\n\n", _("Nonterminals, with rules where they appear"));
+  for (i = ntokens; i < nsyms; i++)
+    {
+      int left_count = 0, right_count = 0;
+      rule_number r;
+      const char *tag = symbols[i]->tag;
+
+      for (r = 0; r < nrules; r++)
+	{
+	  item_number *rhsp;
+	  if (rules[r].lhs->number == i)
+	    left_count++;
+	  for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+	    if (item_number_as_symbol_number (*rhsp) == i)
+	      {
+		right_count++;
+		break;
+	      }
+	}
+
+      buffer[0] = 0;
+      fputs (tag, out);
+      column = strlen (tag);
+      sprintf (buffer, " (%d)", i);
+      END_TEST (0);
+
+      if (left_count > 0)
+	{
+	  END_TEST (65);
+	  sprintf (buffer + strlen (buffer), _(" on left:"));
+
+	  for (r = 0; r < nrules; r++)
+	    {
+	      if (rules[r].lhs->number == i)
+		{
+		  END_TEST (65);
+		  sprintf (buffer + strlen (buffer), " %d", r);
+		}
+	    }
+	}
+
+      if (right_count > 0)
+	{
+	  if (left_count > 0)
+	    sprintf (buffer + strlen (buffer), ",");
+	  END_TEST (65);
+	  sprintf (buffer + strlen (buffer), _(" on right:"));
+	  for (r = 0; r < nrules; r++)
+	    {
+	      item_number *rhsp;
+	      for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+		if (item_number_as_symbol_number (*rhsp) == i)
+		  {
+		    END_TEST (65);
+		    sprintf (buffer + strlen (buffer), " %d", r);
+		    break;
+		  }
+	    }
+	}
+      fprintf (out, "%s\n", buffer);
+    }
+}
+
+void
+print_results (void)
+{
+  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);
+}
Property changes on: bison\src\bison\2.4.1\bison-2.4.1-src\src\print.c
___________________________________________________________________
Added: svn:eol-style
   + LF