Update

[bison.git] / src / conflicts.c

diff --git a/src/conflicts.c b/src/conflicts.c
index a054dbd04eee62171a9567f0917f889e53e84d17..208f791004816bc516c6944d98c8b084c34f2a3f 100644 (file)
--- a/src/conflicts.c
+++ b/src/conflicts.c
@@ -1,70 +1,38 @@
 /* Find and resolve or report look-ahead conflicts for bison,
 /* Find and resolve or report look-ahead conflicts for bison,

-   Copyright (C) 1984, 1989 Free Software Foundation, Inc.
+   Copyright 1984, 1989, 1992, 2000, 2001 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.  */

 
 

-#ifdef _AIX
- #pragma alloca
-#endif
-#include <stdio.h>

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

-#include "machine.h"
-#include "new.h"
+#include "getargs.h"
+#include "xalloc.h"

 #include "files.h"
 #include "gram.h"
 #include "state.h"
 #include "files.h"
 #include "gram.h"
 #include "state.h"

+#include "lalr.h"
+#include "conflicts.h"
+#include "reader.h"
+#include "LR0.h"

 
 

-
-#ifndef __GNUC__
-#undef alloca
-#define alloca __builtin_alloca
-#else
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#else
-#ifndef _AIX
-extern char *alloca ();
-#endif
-#endif
-#endif
-
-extern char **tags;
-extern int tokensetsize;
-extern char *consistent;
-extern short *accessing_symbol;
-extern shifts **shift_table;
-extern unsigned *LA;
-extern short *LAruleno;
-extern short *lookaheads;
-extern int verboseflag;
-
-void set_conflicts();
-void resolve_sr_conflict();
-void flush_shift();
-void log_resolution();
-void total_conflicts();
-void count_sr_conflicts();
-void count_rr_conflicts();
-
-char any_conflicts;
-char *conflicts;
+int any_conflicts = 0;

 errs **err_table;
 int expected_conflicts;
 errs **err_table;
 int expected_conflicts;

-
+static char *conflicts;

 
 static unsigned *shiftset;
 static unsigned *lookaheadset;
 
 static unsigned *shiftset;
 static unsigned *lookaheadset;


@@ -72,126 +40,61 @@ static int src_total;
 static int rrc_total;
 static int src_count;
 static int rrc_count;
 static int rrc_total;
 static int src_count;
 static int rrc_count;

+\f

 
 

-
-void
-initialize_conflicts()
+static inline void
+log_resolution (int state, int LAno, int token, char *resolution)

 {
 {

-  register int i;
-/*  register errs *sp; JF unused */
-
-  conflicts = NEW2(nstates, char);
-  shiftset = NEW2(tokensetsize, unsigned);
-  lookaheadset = NEW2(tokensetsize, unsigned);
-
-  err_table = NEW2(nstates, errs *);
-
-  any_conflicts = 0;
-
-  for (i = 0; i < nstates; i++)
-    set_conflicts(i);
+  obstack_fgrow4 (&output_obstack,
+                 _("\
+Conflict in state %d between rule %d and token %s resolved as %s.\n"),
+                 state, LAruleno[LAno], tags[token], resolution);

 }
 
 
 }
 
 

-void
-set_conflicts(state)
-int state;
-{
-  register int i;
-  register int k;
-  register shifts *shiftp;
-  register unsigned *fp2;
-  register unsigned *fp3;
-  register unsigned *fp4;
-  register unsigned *fp1;
-  register int symbol;
-
-  if (consistent[state]) return;
+/*------------------------------------------------------------------.
+| Turn off the shift recorded for the specified token in the        |
+| specified state.  Used when we resolve a shift-reduce conflict in |
+| favor of the reduction.                                           |
+`------------------------------------------------------------------*/

 
 

-  for (i = 0; i < tokensetsize; i++)
-    lookaheadset[i] = 0;
+static void
+flush_shift (int state, int token)
+{
+  shifts *shiftp;
+  int k, i;

 
   shiftp = shift_table[state];
 
   shiftp = shift_table[state];

+

   if (shiftp)
     {
       k = shiftp->nshifts;
       for (i = 0; i < k; i++)
        {
   if (shiftp)
     {
       k = shiftp->nshifts;
       for (i = 0; i < k; i++)
        {

-         symbol = accessing_symbol[shiftp->shifts[i]];
-         if (ISVAR(symbol)) break;
-         SETBIT(lookaheadset, symbol);
+         if (shiftp->shifts[i]
+             && token == accessing_symbol[shiftp->shifts[i]])
+           (shiftp->shifts[i]) = 0;

        }
     }
        }
     }

-
-  k = lookaheads[state + 1];
-  fp4 = lookaheadset + tokensetsize;
-
-  /* loop over all rules which require lookahead in this state */
-  /* first check for shift-reduce conflict, and try to resolve using precedence  */
-
-  for (i = lookaheads[state]; i < k; i++)
-    if (rprec[LAruleno[i]])
-      {
-       fp1 = LA + i * tokensetsize;
-       fp2 = fp1;
-       fp3 = lookaheadset;
-  
-       while (fp3 < fp4)
-         {
-           if (*fp2++ & *fp3++)
-             {
-               resolve_sr_conflict(state, i);
-               break;
-             }
-         }
-      }
-
-  /* loop over all rules which require lookahead in this state */
-  /* Check for conflicts not resolved above.  */
-
-  for (i = lookaheads[state]; i < k; i++)
-    {
-      fp1 = LA + i * tokensetsize;
-      fp2 = fp1;
-      fp3 = lookaheadset;
-
-      while (fp3 < fp4)
-       {
-         if (*fp2++ & *fp3++)
-           {
-             conflicts[state] = 1;
-             any_conflicts = 1;
-           }
-       }
-
-      fp2 = fp1;
-      fp3 = lookaheadset;
-
-      while (fp3 < fp4)
-       *fp3++ |= *fp2++;
-    }

 }
 
 
 }
 
 

+/*------------------------------------------------------------------.
+| Attempt to resolve shift-reduce conflict for one rule by means of |
+| precedence declarations.  It has already been checked that the    |
+| rule has a precedence.  A conflict is resolved by modifying the   |
+| shift or reduce tables so that there is no longer a conflict.     |
+`------------------------------------------------------------------*/

 
 

-/* Attempt to resolve shift-reduce conflict for one rule
-by means of precedence declarations.
-It has already been checked that the rule has a precedence.
-A conflict is resolved by modifying the shift or reduce tables
-so that there is no longer a conflict.  */
-
-void
-resolve_sr_conflict(state, lookaheadnum)
-int state;
-int lookaheadnum;
+static void
+resolve_sr_conflict (int state, int lookaheadnum)

 {
 {

-  register int i;
-  register int mask;
-  register unsigned *fp1;
-  register unsigned *fp2;
-  register int redprec;
-  /* Extra parens avoid errors on Ultrix 4.3.  */
-  errs *errp = (errs *) alloca ((sizeof(errs) + ntokens * sizeof(short)));
+  int i;
+  int mask;
+  unsigned *fp1;
+  unsigned *fp2;
+  int redprec;
+  errs *errp = (errs *) xcalloc (sizeof (errs) + ntokens * sizeof (short), 1);

   short *errtokens = errp->errs;
 
   /* find the rule to reduce by to get precedence of reduction  */
   short *errtokens = errp->errs;
 
   /* find the rule to reduce by to get precedence of reduction  */


@@ -209,48 +112,47 @@ int lookaheadnum;
        {
          if (sprec[i] < redprec)
            {
        {
          if (sprec[i] < redprec)
            {

-             if (verboseflag) log_resolution(state, lookaheadnum, i, "reduce");
-             *fp2 &= ~mask;  /* flush the shift for this token */
-             flush_shift(state, i);
+             log_resolution (state, lookaheadnum, i, _("reduce"));
+             *fp2 &= ~mask;    /* flush the shift for this token */
+             flush_shift (state, i);

            }
          else if (sprec[i] > redprec)
            {
            }
          else if (sprec[i] > redprec)
            {

-             if (verboseflag) log_resolution(state, lookaheadnum, i, "shift");
-             *fp1 &= ~mask;  /* flush the reduce for this token */
+             log_resolution (state, lookaheadnum, i, _("shift"));
+             *fp1 &= ~mask;    /* flush the reduce for this token */

            }
          else
            {
              /* Matching precedence levels.
            }
          else
            {
              /* Matching precedence levels.

-                For left association, keep only the reduction.
-                For right association, keep only the shift.
-                For nonassociation, keep neither.  */
+                For left association, keep only the reduction.
+                For right association, keep only the shift.
+                For nonassociation, keep neither.  */

 
              switch (sassoc[i])
                {
 
              switch (sassoc[i])
                {

-
-               case RIGHT_ASSOC:
-                 if (verboseflag) log_resolution(state, lookaheadnum, i, "shift");
+               case right_assoc:
+                 log_resolution (state, lookaheadnum, i, _("shift"));

                  break;
 
                  break;
 

-               case LEFT_ASSOC:
-                 if (verboseflag) log_resolution(state, lookaheadnum, i, "reduce");
+               case left_assoc:
+                 log_resolution (state, lookaheadnum, i, _("reduce"));

                  break;
 
                  break;
 

-               case NON_ASSOC:
-                 if (verboseflag) log_resolution(state, lookaheadnum, i, "an error");
+               case non_assoc:
+                 log_resolution (state, lookaheadnum, i, _("an error"));

                  break;
                }
 
                  break;
                }
 

-             if (sassoc[i] != RIGHT_ASSOC)
+             if (sassoc[i] != right_assoc)

                {
                {

-                 *fp2 &= ~mask;  /* flush the shift for this token */
-                 flush_shift(state, i);
+                 *fp2 &= ~mask;        /* flush the shift for this token */
+                 flush_shift (state, i);

                }
                }

-             if (sassoc[i] != LEFT_ASSOC)
-               {
-                 *fp1 &= ~mask;  /* flush the reduce for this token */
+             if (sassoc[i] != left_assoc)
+               {
+                 *fp1 &= ~mask;        /* flush the reduce for this token */

                }
                }

-             if (sassoc[i] == NON_ASSOC)
+             if (sassoc[i] == non_assoc)

                {
                  /* Record an explicit error for this token.  */
                  *errtokens++ = i;
                {
                  /* Record an explicit error for this token.  */
                  *errtokens++ = i;


@@ -262,186 +164,144 @@ int lookaheadnum;
       if (mask == 0)
        {
          mask = 1;
       if (mask == 0)
        {
          mask = 1;

-         fp2++;  fp1++;
+         fp2++;
+         fp1++;

        }
     }
   errp->nerrs = errtokens - errp->errs;
   if (errp->nerrs)
     {
       /* Some tokens have been explicitly made errors.  Allocate
        }
     }
   errp->nerrs = errtokens - errp->errs;
   if (errp->nerrs)
     {
       /* Some tokens have been explicitly made errors.  Allocate

-        a permanent errs structure for this state, to record them.  */
+         a permanent errs structure for this state, to record them.  */

       i = (char *) errtokens - (char *) errp;
       i = (char *) errtokens - (char *) errp;

-      err_table[state] = (errs *) xmalloc ((unsigned int)i);
+      err_table[state] = (errs *) xcalloc ((unsigned int) i, 1);

       bcopy (errp, err_table[state], i);
     }
   else
     err_table[state] = 0;
       bcopy (errp, err_table[state], i);
     }
   else
     err_table[state] = 0;

+  free (errp);

 }
 
 
 }
 
 

-
-/* turn off the shift recorded for the specified token in the specified state.
-Used when we resolve a shift-reduce conflict in favor of the reduction.  */
-
-void
-flush_shift(state, token)
-int state;
-int token;
+static void
+set_conflicts (int state)

 {
 {

-  register shifts *shiftp;
-  register int k, i;
-/*  register unsigned symbol; JF unused */
+  int i;
+  int k;
+  shifts *shiftp;
+  unsigned *fp2;
+  unsigned *fp3;
+  unsigned *fp4;
+  unsigned *fp1;
+  int symbol;
+
+  if (consistent[state])
+    return;

 
 

-  shiftp = shift_table[state];
+  for (i = 0; i < tokensetsize; i++)
+    lookaheadset[i] = 0;

 
 

+  shiftp = shift_table[state];

   if (shiftp)
     {
       k = shiftp->nshifts;
       for (i = 0; i < k; i++)
        {
   if (shiftp)
     {
       k = shiftp->nshifts;
       for (i = 0; i < k; i++)
        {

-         if (shiftp->shifts[i] && token == accessing_symbol[shiftp->shifts[i]])
-           (shiftp->shifts[i]) = 0;
+         symbol = accessing_symbol[shiftp->shifts[i]];
+         if (ISVAR (symbol))
+           break;
+         SETBIT (lookaheadset, symbol);

        }
     }
        }
     }

-}

 
 

+  k = lookaheads[state + 1];
+  fp4 = lookaheadset + tokensetsize;

 
 

-void
-log_resolution(state, LAno, token, resolution)
-int state, LAno, token;
-char *resolution;
-{
-  fprintf(foutput,
-         "Conflict in state %d between rule %d and token %s resolved as %s.\n",
-         state, LAruleno[LAno], tags[token], resolution);
-}
-
+  /* Loop over all rules which require lookahead in this state.  First
+     check for shift-reduce conflict, and try to resolve using
+     precedence */
+  for (i = lookaheads[state]; i < k; i++)
+    if (rprec[LAruleno[i]])
+      {
+       fp1 = LA + i * tokensetsize;
+       fp2 = fp1;
+       fp3 = lookaheadset;

 
 

-void
-conflict_log()
-{
-  register int i;
+       while (fp3 < fp4)
+         {
+           if (*fp2++ & *fp3++)
+             {
+               resolve_sr_conflict (state, i);
+               break;
+             }
+         }
+      }

 
 

-  src_total = 0;
-  rrc_total = 0;

 
 

-  for (i = 0; i < nstates; i++)
+  /* Loop over all rules which require lookahead in this state.  Check
+     for conflicts not resolved above.  */
+  for (i = lookaheads[state]; i < k; i++)

     {
     {

-      if (conflicts[i])
-       {
-         count_sr_conflicts(i);
-         count_rr_conflicts(i);
-         src_total += src_count;
-         rrc_total += rrc_count;
-       }
-    }
-
-  total_conflicts();
-}
-  
-
-void
-verbose_conflict_log()
-{
-  register int i;
-
-  src_total = 0;
-  rrc_total = 0;
+      fp1 = LA + i * tokensetsize;
+      fp2 = fp1;
+      fp3 = lookaheadset;

 
 

-  for (i = 0; i < nstates; i++)
-    {
-      if (conflicts[i])
+      while (fp3 < fp4)

        {
        {

-         count_sr_conflicts(i);
-         count_rr_conflicts(i);
-         src_total += src_count;
-         rrc_total += rrc_count;
-
-         fprintf(foutput, "State %d contains", i);
-
-         if (src_count == 1)
-           fprintf(foutput, " 1 shift/reduce conflict");
-         else if (src_count > 1)
-           fprintf(foutput, " %d shift/reduce conflicts", src_count);
-
-         if (src_count > 0 && rrc_count > 0)
-           fprintf(foutput, " and");
+         if (*fp2++ & *fp3++)
+           {
+             conflicts[state] = 1;
+             any_conflicts = 1;
+           }
+       }

 
 

-         if (rrc_count == 1)
-           fprintf(foutput, " 1 reduce/reduce conflict");
-         else if (rrc_count > 1)
-           fprintf(foutput, " %d reduce/reduce conflicts", rrc_count);
+      fp2 = fp1;
+      fp3 = lookaheadset;

 
 

-         putc('.', foutput);
-         putc('\n', foutput);
-       }
+      while (fp3 < fp4)
+       *fp3++ |= *fp2++;

     }
     }

-
-  total_conflicts();

 }
 
 }
 

-

 void
 void

-total_conflicts()
+initialize_conflicts (void)

 {
 {

-  extern int fixed_outfiles;
-
-  if (src_total == expected_conflicts && rrc_total == 0)
-    return;
-
-  if (fixed_outfiles)
-    {
-      /* If invoked under the name `yacc', use the output format
-        specified by POSIX.  */
-      fprintf(stderr, "conflicts: ");
-      if (src_total > 0)
-       fprintf(stderr, " %d shift/reduce", src_total);
-      if (src_total > 0 && rrc_total > 0)
-       fprintf(stderr, ",");
-      if (rrc_total > 0)
-       fprintf(stderr, " %d reduce/reduce", rrc_total);
-      putc('\n', stderr);
-    }
-  else
-    {
-      fprintf(stderr, "%s contains", infile);
+  int i;

 
 

-      if (src_total == 1)
-       fprintf(stderr, " 1 shift/reduce conflict");
-      else if (src_total > 1)
-       fprintf(stderr, " %d shift/reduce conflicts", src_total);
+  conflicts = XCALLOC (char, nstates);
+  shiftset = XCALLOC (unsigned, tokensetsize);
+  lookaheadset = XCALLOC (unsigned, tokensetsize);

 
 

-      if (src_total > 0 && rrc_total > 0)
-       fprintf(stderr, " and");
+  err_table = XCALLOC (errs *, nstates);

 
 

-      if (rrc_total == 1)
-       fprintf(stderr, " 1 reduce/reduce conflict");
-      else if (rrc_total > 1)
-       fprintf(stderr, " %d reduce/reduce conflicts", rrc_total);
+  any_conflicts = 0;

 
 

-      putc('.', stderr);
-      putc('\n', stderr);
-    }
+  for (i = 0; i < nstates; i++)
+    set_conflicts (i);

 }
 
 
 }
 
 

-void
-count_sr_conflicts(state)
-int state;
+/*---------------------------------------------.
+| Count the number of shift/reduce conflicts.  |
+`---------------------------------------------*/
+
+static void
+count_sr_conflicts (int state)

 {
 {

-  register int i;
-  register int k;
-  register int mask;
-  register shifts *shiftp;
-  register unsigned *fp1;
-  register unsigned *fp2;
-  register unsigned *fp3;
-  register int symbol;
+  int i;
+  int k;
+  int mask;
+  shifts *shiftp;
+  unsigned *fp1;
+  unsigned *fp2;
+  unsigned *fp3;
+  int symbol;

 
   src_count = 0;
 
   shiftp = shift_table[state];
 
   src_count = 0;
 
   shiftp = shift_table[state];

-  if (!shiftp) return;
+  if (!shiftp)
+    return;

 
   for (i = 0; i < tokensetsize; i++)
     {
 
   for (i = 0; i < tokensetsize; i++)
     {


@@ -452,10 +312,12 @@ int state;
   k = shiftp->nshifts;
   for (i = 0; i < k; i++)
     {
   k = shiftp->nshifts;
   for (i = 0; i < k; i++)
     {

-      if (! shiftp->shifts[i]) continue;
+      if (!shiftp->shifts[i])
+       continue;

       symbol = accessing_symbol[shiftp->shifts[i]];
       symbol = accessing_symbol[shiftp->shifts[i]];

-      if (ISVAR(symbol)) break;
-      SETBIT(shiftset, symbol);
+      if (ISVAR (symbol))
+       break;
+      SETBIT (shiftset, symbol);

     }
 
   k = lookaheads[state + 1];
     }
 
   k = lookaheads[state + 1];


@@ -493,25 +355,29 @@ int state;
 }
 
 
 }
 
 

-void
-count_rr_conflicts(state)
-int state;
+/*----------------------------------------------.
+| Count the number of reduce/reduce conflicts.  |
+`----------------------------------------------*/
+
+static void
+count_rr_conflicts (int state)

 {
 {

-  register int i;
-  register int j;
-  register int count;
-  register unsigned mask;
-  register unsigned *baseword;
-  register unsigned *wordp;
-  register int m;
-  register int n;
+  int i;
+  int j;
+  int count;
+  unsigned mask;
+  unsigned *baseword;
+  unsigned *wordp;
+  int m;
+  int n;

 
   rrc_count = 0;
 
   m = lookaheads[state];
   n = lookaheads[state + 1];
 
 
   rrc_count = 0;
 
   m = lookaheads[state];
   n = lookaheads[state + 1];
 

-  if (n - m < 2) return;
+  if (n - m < 2)
+    return;

 
   mask = 1;
   baseword = LA + m * tokensetsize;
 
   mask = 1;
   baseword = LA + m * tokensetsize;


@@ -528,7 +394,8 @@ int state;
          wordp += tokensetsize;
        }
 
          wordp += tokensetsize;
        }
 

-      if (count >= 2) rrc_count++;
+      if (count >= 2)
+       rrc_count++;

 
       mask <<= 1;
       if (mask == 0)
 
       mask <<= 1;
       if (mask == 0)


@@ -539,29 +406,128 @@ int state;
     }
 }
 
     }
 }
 

+/*--------------------------------------------------------------.
+| Return a human readable string which reports shift/reduce and |
+| reduce/reduce conflict numbers (SRC_NUM, RRC_NUM).            |
+`--------------------------------------------------------------*/
+
+static const char *
+conflict_report (int src_num, int rrc_num)
+{
+  static char res[4096];
+  char *cp = res;
+
+  if (src_num == 1)
+    {
+      sprintf (cp, _(" 1 shift/reduce conflict"));
+      cp += strlen (cp);
+    }
+  else if (src_num > 1)
+    {
+      sprintf (cp, _(" %d shift/reduce conflicts"), src_num);
+      cp += strlen (cp);
+    }
+
+  if (src_num > 0 && rrc_num > 0)
+    {
+      sprintf (cp, _(" and"));
+      cp += strlen (cp);
+    }
+
+  if (rrc_num == 1)
+    {
+      sprintf (cp, _(" 1 reduce/reduce conflict"));
+      cp += strlen (cp);
+    }
+  else if (rrc_num > 1)
+    {
+      sprintf (cp, _(" %d reduce/reduce conflicts"), rrc_num);
+      cp += strlen (cp);
+    }
+
+  *cp++ = '.';
+  *cp++ = '\n';
+  *cp++ = '\0';
+
+  return res;
+}
+
+
+/*---------------------------------------------.
+| Compute and give a report on the conflicts.  |
+`---------------------------------------------*/

 
 void
 
 void

-print_reductions(state)
-int state;
+print_conflicts (void)

 {
 {

-  register int i;
-  register int j;
-  register int k;
-  register unsigned *fp1;
-  register unsigned *fp2;
-  register unsigned *fp3;
-  register unsigned *fp4;
-  register int rule;
-  register int symbol;
-  register unsigned mask;
-  register int m;
-  register int n;
-  register int default_LA;
-  register int default_rule;
-  register int cmax;
-  register int count;
-  register shifts *shiftp;
-  register errs *errp;
+  int i;
+
+  src_total = 0;
+  rrc_total = 0;
+
+  /* Count the total number of conflicts, and if wanted, give a
+     detailed report in FOUTPUT.  */
+  for (i = 0; i < nstates; i++)
+    {
+      if (conflicts[i])
+       {
+         count_sr_conflicts (i);
+         count_rr_conflicts (i);
+         src_total += src_count;
+         rrc_total += rrc_count;
+
+         if (verbose_flag)
+           {
+             obstack_fgrow1 (&output_obstack, _("State %d contains"), i);
+             obstack_sgrow (&output_obstack,
+                            conflict_report (src_count, rrc_count));
+           }
+       }
+    }
+
+  /* Report the total number of conflicts on STDERR.  */
+  if (yacc_flag)
+    {
+      /* If invoked with `--yacc', use the output format specified by
+        POSIX.  */
+      fprintf (stderr, _("conflicts: "));
+      if (src_total > 0)
+       fprintf (stderr, _(" %d shift/reduce"), src_total);
+      if (src_total > 0 && rrc_total > 0)
+       fprintf (stderr, ",");
+      if (rrc_total > 0)
+       fprintf (stderr, _(" %d reduce/reduce"), rrc_total);
+      putc ('\n', stderr);
+    }
+  else
+    {
+      fprintf (stderr, _("%s contains"), infile);
+      fputs (conflict_report (src_total, rrc_total), stderr);
+    }
+}
+
+
+void
+print_reductions (int state)
+{
+  int i;
+  int j;
+  int k;
+  unsigned *fp1;
+  unsigned *fp2;
+  unsigned *fp3;
+  unsigned *fp4;
+  int rule;
+  int symbol;
+  unsigned mask;
+  int m;
+  int n;
+  int default_LA;
+  int default_rule = 0;
+  int cmax;
+  int count;
+  shifts *shiftp;
+  errs *errp;

   int nodefault = 0;
 
   for (i = 0; i < tokensetsize; i++)
   int nodefault = 0;
 
   for (i = 0; i < tokensetsize; i++)


@@ -573,13 +539,16 @@ int state;
       k = shiftp->nshifts;
       for (i = 0; i < k; i++)
        {
       k = shiftp->nshifts;
       for (i = 0; i < k; i++)
        {

-         if (! shiftp->shifts[i]) continue;
+         if (!shiftp->shifts[i])
+           continue;

          symbol = accessing_symbol[shiftp->shifts[i]];
          symbol = accessing_symbol[shiftp->shifts[i]];

-         if (ISVAR(symbol)) break;
+         if (ISVAR (symbol))
+           break;

          /* if this state has a shift for the error token,
             don't use a default rule.  */
          /* if this state has a shift for the error token,
             don't use a default rule.  */

-         if (symbol == error_token_number) nodefault = 1;
-         SETBIT(shiftset, symbol);
+         if (symbol == error_token_number)
+           nodefault = 1;
+         SETBIT (shiftset, symbol);

        }
     }
 
        }
     }
 


@@ -589,16 +558,17 @@ int state;
       k = errp->nerrs;
       for (i = 0; i < k; i++)
        {
       k = errp->nerrs;
       for (i = 0; i < k; i++)
        {

-         if (! errp->errs[i]) continue;
+         if (!errp->errs[i])
+           continue;

          symbol = errp->errs[i];
          symbol = errp->errs[i];

-         SETBIT(shiftset, symbol);
+         SETBIT (shiftset, symbol);

        }
     }
 
   m = lookaheads[state];
   n = lookaheads[state + 1];
 
        }
     }
 
   m = lookaheads[state];
   n = lookaheads[state + 1];
 

-  if (n - m == 1 && ! nodefault)
+  if (n - m == 1 && !nodefault)

     {
       default_rule = LAruleno[m];
 
     {
       default_rule = LAruleno[m];
 


@@ -616,8 +586,9 @@ int state;
       for (i = 0; i < ntokens; i++)
        {
          if (mask & *fp3)
       for (i = 0; i < ntokens; i++)
        {
          if (mask & *fp3)

-           fprintf(foutput, "    %-4s\t[reduce using rule %d (%s)]\n",
-                   tags[i], default_rule, tags[rlhs[default_rule]]);
+           obstack_fgrow3 (&output_obstack,
+                           _("    %-4s\t[reduce using rule %d (%s)]\n"),
+                           tags[i], default_rule, tags[rlhs[default_rule]]);

 
          mask <<= 1;
          if (mask == 0)
 
          mask <<= 1;
          if (mask == 0)


@@ -627,8 +598,9 @@ int state;
            }
        }
 
            }
        }
 

-      fprintf(foutput, "    $default\treduce using rule %d (%s)\n\n",
-             default_rule, tags[rlhs[default_rule]]);
+      obstack_fgrow2 (&output_obstack,
+                     _("    $default\treduce using rule %d (%s)\n\n"),
+                     default_rule, tags[rlhs[default_rule]]);

     }
   else if (n - m >= 1)
     {
     }
   else if (n - m >= 1)
     {


@@ -636,16 +608,16 @@ int state;
       default_LA = -1;
       fp4 = lookaheadset + tokensetsize;
 
       default_LA = -1;
       fp4 = lookaheadset + tokensetsize;
 

-      if (! nodefault)
+      if (!nodefault)

        for (i = m; i < n; i++)
          {
            fp1 = LA + i * tokensetsize;
            fp2 = shiftset;
            fp3 = lookaheadset;
        for (i = m; i < n; i++)
          {
            fp1 = LA + i * tokensetsize;
            fp2 = shiftset;
            fp3 = lookaheadset;

-  
+

            while (fp3 < fp4)
            while (fp3 < fp4)

-             *fp3++ = *fp1++ & ( ~ (*fp2++));
-  
+             *fp3++ = *fp1++ & (~(*fp2++));
+

            count = 0;
            mask = 1;
            fp3 = lookaheadset;
            count = 0;
            mask = 1;
            fp3 = lookaheadset;


@@ -653,7 +625,7 @@ int state;
              {
                if (mask & *fp3)
                  count++;
              {
                if (mask & *fp3)
                  count++;

-  
+

                mask <<= 1;
                if (mask == 0)
                  {
                mask <<= 1;
                if (mask == 0)
                  {


@@ -661,35 +633,37 @@ int state;
                    fp3++;
                  }
              }
                    fp3++;
                  }
              }

-  
+

            if (count > cmax)
              {
                cmax = count;
                default_LA = i;
                default_rule = LAruleno[i];
              }
            if (count > cmax)
              {
                cmax = count;
                default_LA = i;
                default_rule = LAruleno[i];
              }

-  
+

            fp2 = shiftset;
            fp3 = lookaheadset;
            fp2 = shiftset;
            fp3 = lookaheadset;

-  
+

            while (fp3 < fp4)
              *fp2++ |= *fp3++;
          }
 
       for (i = 0; i < tokensetsize; i++)
            while (fp3 < fp4)
              *fp2++ |= *fp3++;
          }
 
       for (i = 0; i < tokensetsize; i++)

-        shiftset[i] = 0;
+       shiftset[i] = 0;

 
       if (shiftp)
 
       if (shiftp)

-        {
-          k = shiftp->nshifts;
-          for (i = 0; i < k; i++)
+       {
+         k = shiftp->nshifts;
+         for (i = 0; i < k; i++)

            {
            {

-             if (! shiftp->shifts[i]) continue;
+             if (!shiftp->shifts[i])
+               continue;

              symbol = accessing_symbol[shiftp->shifts[i]];
              symbol = accessing_symbol[shiftp->shifts[i]];

-             if (ISVAR(symbol)) break;
-             SETBIT(shiftset, symbol);
+             if (ISVAR (symbol))
+               break;
+             SETBIT (shiftset, symbol);

            }
            }

-        }
+       }

 
       mask = 1;
       fp1 = LA + m * tokensetsize;
 
       mask = 1;
       fp1 = LA + m * tokensetsize;


@@ -713,10 +687,12 @@ int state;
                      if (j != default_LA)
                        {
                          rule = LAruleno[j];
                      if (j != default_LA)
                        {
                          rule = LAruleno[j];

-                         fprintf(foutput, "    %-4s\treduce using rule %d (%s)\n",
-                                 tags[i], rule, tags[rlhs[rule]]);
+                         obstack_fgrow3 (&output_obstack,
+                                  _("    %-4s\treduce using rule %d (%s)\n"),
+                                  tags[i], rule, tags[rlhs[rule]]);

                        }
                        }

-                     else defaulted = 1;
+                     else
+                       defaulted = 1;

 
                      count++;
                    }
 
                      count++;
                    }


@@ -725,13 +701,15 @@ int state;
                      if (defaulted)
                        {
                          rule = LAruleno[default_LA];
                      if (defaulted)
                        {
                          rule = LAruleno[default_LA];

-                         fprintf(foutput, "    %-4s\treduce using rule %d (%s)\n",
-                                 tags[i], rule, tags[rlhs[rule]]);
+                         obstack_fgrow3 (&output_obstack,
+                                  _("    %-4s\treduce using rule %d (%s)\n"),
+                                  tags[i], rule, tags[rlhs[rule]]);

                          defaulted = 0;
                        }
                      rule = LAruleno[j];
                          defaulted = 0;
                        }
                      rule = LAruleno[j];

-                     fprintf(foutput, "    %-4s\t[reduce using rule %d (%s)]\n",
-                             tags[i], rule, tags[rlhs[rule]]);
+                     obstack_fgrow3 (&output_obstack,
+                              _("    %-4s\t[reduce using rule %d (%s)]\n"),
+                              tags[i], rule, tags[rlhs[rule]]);

                    }
                }
 
                    }
                }
 


@@ -743,27 +721,26 @@ int state;
            {
              mask = 1;
              /* We tried incrementing just fp1, and just fp2; both seem wrong.
            {
              mask = 1;
              /* We tried incrementing just fp1, and just fp2; both seem wrong.

-                It seems necessary to increment both in sync.  */
+                It seems necessary to increment both in sync.  */

              fp1++;
              fp2++;
            }
        }
 
       if (default_LA >= 0)
              fp1++;
              fp2++;
            }
        }
 
       if (default_LA >= 0)

-       {
-         fprintf(foutput, "    $default\treduce using rule %d (%s)\n",
-                 default_rule, tags[rlhs[default_rule]]);
-       }
+       obstack_fgrow2 (&output_obstack,
+                       _("    $default\treduce using rule %d (%s)\n"),
+                       default_rule, tags[rlhs[default_rule]]);

 
 

-      putc('\n', foutput);
+      obstack_1grow (&output_obstack, '\n');

     }
 }
 
 
 void
     }
 }
 
 
 void

-finalize_conflicts()
+finalize_conflicts (void)

 {
 {

-  FREE(conflicts);
-  FREE(shiftset);
-  FREE(lookaheadset);
+  XFREE (conflicts);
+  XFREE (shiftset);
+  XFREE (lookaheadset);

 }
 }