* src/lalr.h (state_t): New.

[bison.git] / src / lalr.c

diff --git a/src/lalr.c b/src/lalr.c
index 7e8aff70146dc51d227e3c116d4d5eaa6d6ae839..4b11caaa7d124ecaeccee297da91031368ddb26f 100644 (file)
--- a/src/lalr.c
+++ b/src/lalr.c
@@ -26,20 +26,23 @@
 #include "system.h"
 #include "types.h"
 #include "LR0.h"
-#include "xalloc.h"
 #include "gram.h"
 #include "complain.h"
 #include "lalr.h"
 #include "nullable.h"
 #include "derives.h"
 
+/* All the decorated states, indexed by the state number.  Warning:
+   there is a state_TABLE in LR0.c, but it is different and static.
+   */
+state_t *state_table = NULL;
+
 int tokensetsize;
 short *lookaheads;
 short *LAruleno;
 unsigned *LA;
-short *accessing_symbol;
+
 char *consistent;
-core **state_table;
 shifts **shift_table;
 reductions **reduction_table;
 short *goto_map;
@@ -147,22 +150,13 @@ set_state_table (void)
 {
   core *sp;
 
-  state_table = XCALLOC (core *, nstates);
-
-  for (sp = first_state; sp; sp = sp->next)
-    state_table[sp->number] = sp;
-}
-
-
-static void
-set_accessing_symbol (void)
-{
-  core *sp;
-
-  accessing_symbol = XCALLOC (short, nstates);
+  state_table = XCALLOC (state_t, nstates);
 
   for (sp = first_state; sp; sp = sp->next)
-    accessing_symbol[sp->number] = sp->accessing_symbol;
+    {
+      state_table[sp->number].state = sp;
+      state_table[sp->number].accessing_symbol = sp->accessing_symbol;
+    }
 }
 
 
@@ -239,21 +233,21 @@ initialize_LA (void)
 
       rp = reduction_table[i];
       sp = shift_table[i];
-      if (rp && (rp->nreds > 1
-                || (sp && !ISVAR (accessing_symbol[sp->shifts[0]]))))
+      if (rp
+         && (rp->nreds > 1
+             || (sp && !ISVAR (state_table[sp->shifts[0]].accessing_symbol))))
        count += rp->nreds;
       else
        consistent[i] = 1;
 
       if (sp)
        for (k = 0; k < sp->nshifts; k++)
-         {
-           if (accessing_symbol[sp->shifts[k]] == error_token_number)
-             {
-               consistent[i] = 0;
-               break;
-             }
-         }
+         if (state_table[sp->shifts[k]].accessing_symbol
+             == error_token_number)
+           {
+             consistent[i] = 0;
+             break;
+           }
     }
 
   lookaheads[nstates] = count;
@@ -303,7 +297,7 @@ set_goto_map (void)
     {
       for (i = sp->nshifts - 1; i >= 0; i--)
        {
-         symbol = accessing_symbol[sp->shifts[i]];
+         symbol = state_table[sp->shifts[i]].accessing_symbol;
 
          if (ISTOKEN (symbol))
            break;
@@ -338,7 +332,7 @@ set_goto_map (void)
       for (i = sp->nshifts - 1; i >= 0; i--)
        {
          state2 = sp->shifts[i];
-         symbol = accessing_symbol[state2];
+         symbol = state_table[state2].accessing_symbol;
 
          if (ISTOKEN (symbol))
            break;
@@ -422,7 +416,7 @@ initialize_F (void)
 
          for (j = 0; j < k; j++)
            {
-             symbol = accessing_symbol[sp->shifts[j]];
+             symbol = state_table[sp->shifts[j]].accessing_symbol;
              if (ISVAR (symbol))
                break;
              SETBIT (rowp, symbol);
@@ -430,7 +424,7 @@ initialize_F (void)
 
          for (; j < k; j++)
            {
-             symbol = accessing_symbol[sp->shifts[j]];
+             symbol = state_table[sp->shifts[j]].accessing_symbol;
              if (nullable[symbol])
                edge[nedges++] = map_goto (stateno, symbol);
            }
@@ -575,7 +569,7 @@ build_relations (void)
     {
       nedges = 0;
       state1 = from_state[i];
-      symbol1 = accessing_symbol[to_state[i]];
+      symbol1 = state_table[to_state[i]].accessing_symbol;
 
       for (rulep = derives[symbol1]; *rulep > 0; rulep++)
        {
@@ -592,7 +586,7 @@ build_relations (void)
              for (j = 0; j < k; j++)
                {
                  stateno = sp->shifts[j];
-                 if (accessing_symbol[stateno] == symbol2)
+                 if (state_table[stateno].accessing_symbol == symbol2)
                    break;
                }
 
@@ -710,7 +704,6 @@ lalr (void)
   tokensetsize = WORDSIZE (ntokens);
 
   set_state_table ();
-  set_accessing_symbol ();
   set_shift_table ();
   set_reduction_table ();
   set_maxrhs ();