* src/LR0.c (state_list_t, state_list_append): New.

[bison.git] / src / closure.c

diff --git a/src/closure.c b/src/closure.c
index d45210e646f215b50d537e2bde9c094ebbf66e27..ea64250ea5aa9cf1741b26bc6a81c058f5974fac 100644 (file)
--- a/src/closure.c
+++ b/src/closure.c
@@ -19,19 +19,20 @@
    02111-1307, USA.  */
 
 #include "system.h"
+#include "quotearg.h"
 #include "bitset.h"
 #include "bitsetv.h"
+#include "bitsetv-print.h"
 #include "getargs.h"
 #include "symtab.h"
 #include "gram.h"
 #include "reader.h"
 #include "closure.h"
 #include "derives.h"
-#include "warshall.h"
 
 /* NITEMSET is the size of the array ITEMSET.  */
-short *itemset;
-int nitemset;
+item_number_t *itemset;
+int nritemset;
 
 static bitset ruleset;
 
@@ -49,16 +50,16 @@ static bitsetv firsts = NULL;
 `-----------------*/
 
 static void
-print_closure (const char *title, short *array, size_t size)
+print_closure (const char *title, item_number_t *array, size_t size)
 {
   size_t i;
   fprintf (stderr, "Closure: %s\n", title);
   for (i = 0; i < size; ++i)
     {
-      short *rp;
+      item_number_t *rp;
       fprintf (stderr, "  %2d: .", array[i]);
       for (rp = &ritem[array[i]]; *rp >= 0; ++rp)
-       fprintf (stderr, " %s", symbols[*rp]->tag);
+       fprintf (stderr, " %s", symbol_tag_get (symbols[*rp]));
       fprintf (stderr, "  (rule %d)\n", -*rp - 1);
     }
   fputs ("\n\n", stderr);
@@ -73,11 +74,11 @@ print_firsts (void)
   fprintf (stderr, "FIRSTS\n");
   for (i = ntokens; i < nsyms; i++)
     {
-      fprintf (stderr, "\t%s firsts\n", symbols[i]->tag);
+      fprintf (stderr, "\t%s firsts\n", symbol_tag_get (symbols[i]));
       for (j = 0; j < nvars; j++)
        if (bitset_test (FIRSTS (i), j))
-         fprintf (stderr, "\t\t%d (%s)\n",
-                  j + ntokens, symbols[j + ntokens]->tag);
+         fprintf (stderr, "\t\t%s\n",
+                  symbol_tag_get (symbols[j + ntokens]));
     }
   fprintf (stderr, "\n\n");
 }
@@ -91,14 +92,14 @@ print_fderives (void)
   fprintf (stderr, "FDERIVES\n");
   for (i = ntokens; i < nsyms; i++)
     {
-      fprintf (stderr, "\t%s derives\n", symbols[i]->tag);
-      for (j = 0; j <= nrules; j++)
+      fprintf (stderr, "\t%s derives\n", symbol_tag_get (symbols[i]));
+      for (j = 0; j < nrules + 1; j++)
        if (bitset_test (FDERIVES (i), j))
          {
-           short *rhsp;
+           item_number_t *rhsp;
            fprintf (stderr, "\t\t%d:", j - 1);
-           for (rhsp = &ritem[rules[j].rhs]; *rhsp >= 0; ++rhsp)
-             fprintf (stderr, " %s", symbols[*rhsp]->tag);
+           for (rhsp = rules[j].rhs; *rhsp >= 0; ++rhsp)
+             fprintf (stderr, " %s", symbol_tag_get (symbols[*rhsp]));
            fputc ('\n', stderr);
          }
     }
@@ -126,12 +127,16 @@ set_firsts (void)
   for (i = ntokens; i < nsyms; i++)
     for (j = 0; derives[i][j] >= 0; ++j)
       {
-       int symbol = ritem[rules[derives[i][j]].rhs];
+       int symbol = rules[derives[i][j]].rhs[0];
        if (ISVAR (symbol))
          bitset_set (FIRSTS (i), symbol - ntokens);
       }
 
-  RTC (firsts);
+  if (trace_flag)
+    bitsetv_matrix_dump (stderr, "RTC: Firsts Input", firsts);
+  bitsetv_reflexive_transitive_closure (firsts);
+  if (trace_flag)
+    bitsetv_matrix_dump (stderr, "RTC: Firsts Output", firsts);
 
   if (trace_flag)
     print_firsts ();
@@ -167,12 +172,13 @@ set_fderives (void)
 
   bitsetv_free (firsts);
 }
+
 \f
 
 void
 new_closure (int n)
 {
-  itemset = XCALLOC (short, n);
+  itemset = XCALLOC (item_number_t, n);
 
   ruleset = bitset_create (nrules + 1, BITSET_FIXED);
 
@@ -182,7 +188,7 @@ new_closure (int n)
 
 
 void
-closure (short *core, int n)
+closure (item_number_t *core, int n)
 {
   /* Index over CORE. */
   int c;
@@ -193,44 +199,37 @@ closure (short *core, int n)
   if (trace_flag)
     print_closure ("input", core, n);
 
-  if (n == 0)
-    {
-      bitset_copy (ruleset, FDERIVES (start_symbol));
-    }
-  else
-    {
-      bitset_zero (ruleset);
+  bitset_zero (ruleset);
 
-      for (c = 0; c < n; ++c)
-       if (ISVAR (ritem[core[c]]))
-         bitset_or (ruleset, ruleset, FDERIVES (ritem[core[c]]));
-    }
+  for (c = 0; c < n; ++c)
+    if (ISVAR (ritem[core[c]]))
+      bitset_or (ruleset, ruleset, FDERIVES (ritem[core[c]]));
 
-  nitemset = 0;
+  nritemset = 0;
   c = 0;
   for (ruleno = 0; ruleno < nrules + 1; ++ruleno)
     if (bitset_test (ruleset, ruleno))
       {
-       int itemno = rules[ruleno].rhs;
+       item_number_t itemno = rules[ruleno].rhs - ritem;
        while (c < n && core[c] < itemno)
          {
-           itemset[nitemset] = core[c];
-           nitemset++;
+           itemset[nritemset] = core[c];
+           nritemset++;
            c++;
          }
-       itemset[nitemset] = itemno;
-       nitemset++;
+       itemset[nritemset] = itemno;
+       nritemset++;
       }
 
   while (c < n)
     {
-      itemset[nitemset] = core[c];
-      nitemset++;
+      itemset[nritemset] = core[c];
+      nritemset++;
       c++;
     }
 
   if (trace_flag)
-    print_closure ("output", itemset, nitemset);
+    print_closure ("output", itemset, nritemset);
 }