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[bison.git] / src / print.c

diff --git a/src/print.c b/src/print.c
index b9c518f7dd1bd6f3ca35c46ba7821eab712de174..72b4cd0a4f89b30943853946c46c5892bb11c2be 100644 (file)
--- a/src/print.c
+++ b/src/print.c
@@ -20,7 +20,9 @@
 
 
 #include "system.h"
+#include "quotearg.h"
 #include "files.h"
+#include "symtab.h"
 #include "gram.h"
 #include "LR0.h"
 #include "lalr.h"
@@ -43,6 +45,19 @@ print_token (int extnum, int token)
 }
 #endif
 
+static inline const char *
+escape (const char *s)
+{
+  return quotearg_n_style (1, escape_quoting_style, s);
+}
+
+/* Be cautious not to use twice the same slot in a single expression. */
+static inline const char *
+escape2 (const char *s)
+{
+  return quotearg_n_style (2, escape_quoting_style, s);
+}
+
 \f
 /*--------------------------------.
 | Report information on a state.  |
@@ -74,21 +89,21 @@ print_core (FILE *out, state_t *state)
 
          sp1 = sp = ritem + sitems[i];
 
-         while (*sp > 0)
+         while (*sp >= 0)
            sp++;
 
          rule = -(*sp);
-         fprintf (out, "    %s  ->  ", tags[rule_table[rule].lhs]);
+         fprintf (out, "    %s  ->  ", escape (symbols[rules[rule].lhs]->tag));
 
-         for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++)
-           fprintf (out, "%s ", tags[*sp]);
+         for (sp = ritem + rules[rule].rhs; sp < sp1; sp++)
+           fprintf (out, "%s ", escape (symbols[*sp]->tag));
 
          fputc ('.', out);
 
-         for (/* Nothing */; *sp > 0; ++sp)
-           fprintf (out, " %s", tags[*sp]);
+         for (/* Nothing */; *sp >= 0; ++sp)
+           fprintf (out, " %s", escape (symbols[*sp]->tag));
 
-         fprintf (out, _("   (rule %d)"), rule);
+         fprintf (out, _("   (rule %d)"), rule - 1);
          fputc ('\n', out);
        }
 
@@ -107,10 +122,10 @@ print_shifts (FILE *out, state_t *state)
     if (!SHIFT_IS_DISABLED (shiftp, i))
       {
        int state1 = shiftp->shifts[i];
-       int symbol = state_table[state1]->accessing_symbol;
+       int symbol = states[state1]->accessing_symbol;
        fprintf (out,
                 _("    %-4s\tshift, and go to state %d\n"),
-                tags[symbol], state1);
+                escape (symbols[symbol]->tag), state1);
       }
 
   if (i > 0)
@@ -127,7 +142,7 @@ print_errs (FILE *out, state_t *state)
   for (i = 0; i < errp->nerrs; ++i)
     if (errp->errs[i])
       fprintf (out, _("    %-4s\terror (nonassociative)\n"),
-              tags[errp->errs[i]]);
+              escape (symbols[errp->errs[i]]->tag));
 
   if (i > 0)
     fputc ('\n', out);
@@ -149,9 +164,9 @@ print_gotos (FILE *out, state_t *state)
        if (!SHIFT_IS_DISABLED (shiftp, i))
          {
            int state1 = shiftp->shifts[i];
-           int symbol = state_table[state1]->accessing_symbol;
+           int symbol = states[state1]->accessing_symbol;
            fprintf (out, _("    %-4s\tgo to state %d\n"),
-                    tags[symbol], state1);
+                    escape (symbols[symbol]->tag), state1);
          }
 
       fputc ('\n', out);
@@ -167,12 +182,15 @@ print_reductions (FILE *out, state_t *state)
   errs *errp = state->errs;
   int nodefault = 0;
 
+  if (redp->nreds == 0)
+    return;
+
   if (state->consistent)
     {
       int rule = redp->rules[0];
-      int symbol = rule_table[rule].lhs;
+      int symbol = rules[rule].lhs;
       fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),
-              rule, tags[symbol]);
+              rule - 1, escape (symbols[symbol]->tag));
       return;
     }
 
@@ -204,11 +222,11 @@ print_reductions (FILE *out, state_t *state)
       for (i = 0; i < ntokens; i++)
        if (BITISSET (lookaheadset, i))
          fprintf (out, _("    %-4s\t[reduce using rule %d (%s)]\n"),
-                  tags[i], default_rule,
-                  tags[rule_table[default_rule].lhs]);
+                  escape (symbols[i]->tag), default_rule - 1,
+                  escape2 (symbols[rules[default_rule].lhs]->tag));
 
       fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),
-              default_rule, tags[rule_table[default_rule].lhs]);
+              default_rule - 1, escape (symbols[rules[default_rule].lhs]->tag));
     }
   else if (state->nlookaheads >= 1)
     {
@@ -262,9 +280,9 @@ print_reductions (FILE *out, state_t *state)
                      if (state->lookaheadsp + j != default_LA)
                        fprintf (out,
                                 _("    %-4s\treduce using rule %d (%s)\n"),
-                                tags[i],
-                                LAruleno[state->lookaheadsp + j],
-                                tags[rule_table[LAruleno[state->lookaheadsp + j]].lhs]);
+                                escape (symbols[i]->tag),
+                                LAruleno[state->lookaheadsp + j] - 1,
+                                escape2 (symbols[rules[LAruleno[state->lookaheadsp + j]].lhs]->tag));
                      else
                        defaulted = 1;
 
@@ -275,15 +293,15 @@ print_reductions (FILE *out, state_t *state)
                      if (defaulted)
                        fprintf (out,
                                 _("    %-4s\treduce using rule %d (%s)\n"),
-                                tags[i],
-                                LAruleno[default_LA],
-                                tags[rule_table[LAruleno[default_LA]].lhs]);
+                                escape (symbols[i]->tag),
+                                LAruleno[default_LA] - 1,
+                                escape2 (symbols[rules[LAruleno[default_LA]].lhs]->tag));
                      defaulted = 0;
                      fprintf (out,
                               _("    %-4s\t[reduce using rule %d (%s)]\n"),
-                              tags[i],
-                              LAruleno[state->lookaheadsp + j],
-                              tags[rule_table[LAruleno[state->lookaheadsp + j]].lhs]);
+                              escape (symbols[i]->tag),
+                              LAruleno[state->lookaheadsp + j] - 1,
+                              escape2 (symbols[rules[LAruleno[state->lookaheadsp + j]].lhs]->tag));
                    }
                }
            }
@@ -291,7 +309,8 @@ print_reductions (FILE *out, state_t *state)
 
       if (default_LA >= 0)
        fprintf (out, _("    $default\treduce using rule %d (%s)\n"),
-                default_rule, tags[rule_table[default_rule].lhs]);
+                default_rule - 1,
+                escape (symbols[rules[default_rule].lhs]->tag));
     }
 }
 
@@ -302,19 +321,18 @@ print_actions (FILE *out, state_t *state)
   reductions *redp = state->reductions;
   shifts *shiftp = state->shifts;
 
-  if (!shiftp->nshifts && !redp)
+  if (shiftp->nshifts == 0 && redp->nreds == 0)
     {
       if (final_state == state->number)
-       fprintf (out, _("    $default\taccept\n"));
+       fprintf (out, _("    $default\taccept\n"));
       else
-       fprintf (out, _("    NO ACTIONS\n"));
+       fprintf (out, _("    NO ACTIONS\n"));
       return;
     }
 
   print_shifts (out, state);
   print_errs (out, state);
-  if (redp)
-    print_reductions (out, state);
+  print_reductions (out, state);
   print_gotos (out, state);
 }
 
@@ -356,14 +374,14 @@ print_grammar (FILE *out)
   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].useful)
+    if (rules[i].useful)
       {
        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++]);
+                i - 1, rules[i].line, escape (symbols[rules[i].lhs]->tag));
+       rule = &ritem[rules[i].rhs];
+       if (*rule >= 0)
+         while (*rule >= 0)
+           fprintf (out, " %s", escape (symbols[*rule++]->tag));
        else
          fprintf (out, " /* %s */", _("empty"));
        fputc ('\n', out);
@@ -373,23 +391,21 @@ print_grammar (FILE *out)
 
   /* TERMINAL (type #) : rule #s terminal is on RHS */
   fprintf (out, "%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)
       {
        buffer[0] = 0;
-       column = strlen (tags[token_translations[i]]);
-       fputs (tags[token_translations[i]], out);
+       column = strlen (escape (symbols[token_translations[i]]->tag));
+       fputs (escape (symbols[token_translations[i]]->tag), out);
        END_TEST (50);
        sprintf (buffer, " (%d)", i);
 
        for (j = 1; j <= nrules; j++)
-         for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
+         for (rule = &ritem[rules[j].rhs]; *rule >= 0; rule++)
            if (*rule == token_translations[i])
              {
                END_TEST (65);
-               sprintf (buffer + strlen (buffer), " %d", j);
+               sprintf (buffer + strlen (buffer), " %d", j - 1);
                break;
              }
        fprintf (out, "%s\n", buffer);
@@ -404,9 +420,9 @@ print_grammar (FILE *out)
 
       for (j = 1; j <= nrules; j++)
        {
-         if (rule_table[j].lhs == i)
+         if (rules[j].lhs == i)
            left_count++;
-         for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
+         for (rule = &ritem[rules[j].rhs]; *rule >= 0; rule++)
            if (*rule == i)
              {
                right_count++;
@@ -415,8 +431,8 @@ print_grammar (FILE *out)
        }
 
       buffer[0] = 0;
-      fputs (tags[i], out);
-      column = strlen (tags[i]);
+      fputs (escape (symbols[i]->tag), out);
+      column = strlen (escape (symbols[i]->tag));
       sprintf (buffer, " (%d)", i);
       END_TEST (0);
 
@@ -428,8 +444,8 @@ print_grammar (FILE *out)
          for (j = 1; j <= nrules; j++)
            {
              END_TEST (65);
-             if (rule_table[j].lhs == i)
-               sprintf (buffer + strlen (buffer), " %d", j);
+             if (rules[j].lhs == i)
+               sprintf (buffer + strlen (buffer), " %d", j - 1);
            }
        }
 
@@ -441,11 +457,11 @@ print_grammar (FILE *out)
          sprintf (buffer + strlen (buffer), _(" on right:"));
          for (j = 1; j <= nrules; j++)
            {
-             for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
+             for (rule = &ritem[rules[j].rhs]; *rule >= 0; rule++)
                if (*rule == i)
                  {
                    END_TEST (65);
-                   sprintf (buffer + strlen (buffer), " %d", j);
+                   sprintf (buffer + strlen (buffer), " %d", j - 1);
                    break;
                  }
            }
@@ -480,12 +496,12 @@ print_results (void)
      only its kernel.  Requires to run closure, which need memory
      allocation/deallocation.  */
   if (trace_flag)
-    new_closure (nitems);
+    new_closure (nritems);
   /* Storage for print_reductions.  */
   shiftset = XCALLOC (unsigned, tokensetsize);
   lookaheadset = XCALLOC (unsigned, tokensetsize);
   for (i = 0; i < nstates; i++)
-    print_state (out, state_table[i]);
+    print_state (out, states[i]);
   free (shiftset);
   free (lookaheadset);
   if (trace_flag)