* data/yacc.c, data/glr.c, data/lal1.cc: Use similar code to

[bison.git] / src / lalr.c

diff --git a/src/lalr.c b/src/lalr.c
index a549e5b43061ce28977cc4cfcb53b57c1ec7dae4..4e59d0ad4ac3f5571b1ab7a77b13b35aa7d1e763 100644 (file)
--- a/src/lalr.c
+++ b/src/lalr.c
@@ -1,4 +1,5 @@
-/* Compute look-ahead criteria for bison,
+/* Compute look-ahead criteria for Bison.
+

    Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
    Free Software Foundation, Inc.
 
    Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
    Free Software Foundation, Inc.
 


@@ -25,31 +26,33 @@
    tokens they accept.  */
 
 #include "system.h"
    tokens they accept.  */
 
 #include "system.h"

-#include "bitset.h"
-#include "bitsetv.h"
-#include "relation.h"
-#include "quotearg.h"
-#include "symtab.h"
-#include "gram.h"
-#include "reader.h"
+
+#include <bitset.h>
+#include <bitsetv.h>
+#include <quotearg.h>
+

 #include "LR0.h"
 #include "complain.h"
 #include "LR0.h"
 #include "complain.h"

-#include "lalr.h"
-#include "nullable.h"

 #include "derives.h"
 #include "getargs.h"
 #include "derives.h"
 #include "getargs.h"

+#include "gram.h"
+#include "lalr.h"
+#include "nullable.h"
+#include "reader.h"
+#include "relation.h"
+#include "symtab.h"

 
 

-goto_number_t *goto_map = NULL;
-static goto_number_t ngotos = 0;
-state_number_t *from_state = NULL;
-state_number_t *to_state = NULL;
+goto_number *goto_map = NULL;
+static goto_number ngotos = 0;
+state_number *from_state = NULL;
+state_number *to_state = NULL;

 
 /* Linked list of goto numbers.  */
 
 /* Linked list of goto numbers.  */

-typedef struct goto_list_s
+typedef struct goto_list

 {
 {

-  struct goto_list_s *next;
-  goto_number_t value;
-} goto_list_t;
+  struct goto_list *next;
+  goto_number value;
+} goto_list;

 
 
 /* LA is a LR by NTOKENS matrix of bits.  LA[l, i] is 1 if the rule
 
 
 /* LA is a LR by NTOKENS matrix of bits.  LA[l, i] is 1 if the rule


@@ -65,8 +68,8 @@ size_t nLA;
    comment is hardly needed.  <grin>.  */
 static bitsetv F = NULL;
 
    comment is hardly needed.  <grin>.  */
 static bitsetv F = NULL;
 

-static goto_number_t **includes;
-static goto_list_t **lookback;
+static goto_number **includes;
+static goto_list **lookback;

 
 
 
 
 
 


@@ -74,23 +77,23 @@ static goto_list_t **lookback;
 static void
 set_goto_map (void)
 {
 static void
 set_goto_map (void)
 {

-  state_number_t state;
-  goto_number_t *temp_map;
+  state_number s;
+  goto_number *temp_map;

 
 

-  goto_map = XCALLOC (goto_number_t, nvars + 1) - ntokens;
-  temp_map = XCALLOC (goto_number_t, nvars + 1) - ntokens;
+  CALLOC (goto_map, nvars + 1);
+  CALLOC (temp_map, nvars + 1);

 
   ngotos = 0;
 
   ngotos = 0;

-  for (state = 0; state < nstates; ++state)
+  for (s = 0; s < nstates; ++s)

     {
     {

-      transitions_t *sp = states[state]->transitions;
+      transitions *sp = states[s]->transitions;

       int i;
       for (i = sp->num - 1; i >= 0 && TRANSITION_IS_GOTO (sp, i); --i)
        {
       int i;
       for (i = sp->num - 1; i >= 0 && TRANSITION_IS_GOTO (sp, i); --i)
        {

-         if (ngotos >= GOTO_NUMBER_MAX)
+         if (ngotos >= GOTO_NUMBER_MAXIMUM)

            abort ();
          ngotos++;
            abort ();
          ngotos++;

-         goto_map[TRANSITION_SYMBOL (sp, i)]++;
+         goto_map[TRANSITION_SYMBOL (sp, i) - ntokens]++;

        }
     }
 
        }
     }
 


@@ -99,33 +102,33 @@ set_goto_map (void)
     int i;
     for (i = ntokens; i < nsyms; i++)
       {
     int i;
     for (i = ntokens; i < nsyms; i++)
       {

-       temp_map[i] = k;
-       k += goto_map[i];
+       temp_map[i - ntokens] = k;
+       k += goto_map[i - ntokens];

       }
 
     for (i = ntokens; i < nsyms; i++)
       }
 
     for (i = ntokens; i < nsyms; i++)

-      goto_map[i] = temp_map[i];
+      goto_map[i - ntokens] = temp_map[i - ntokens];

 
 

-    goto_map[nsyms] = ngotos;
-    temp_map[nsyms] = ngotos;
+    goto_map[nsyms - ntokens] = ngotos;
+    temp_map[nsyms - ntokens] = ngotos;

   }
 
   }
 

-  from_state = XCALLOC (state_number_t, ngotos);
-  to_state = XCALLOC (state_number_t, ngotos);
+  CALLOC (from_state, ngotos);
+  CALLOC (to_state, ngotos);

 
 

-  for (state = 0; state < nstates; ++state)
+  for (s = 0; s < nstates; ++s)

     {
     {

-      transitions_t *sp = states[state]->transitions;
+      transitions *sp = states[s]->transitions;

       int i;
       for (i = sp->num - 1; i >= 0 && TRANSITION_IS_GOTO (sp, i); --i)
        {
       int i;
       for (i = sp->num - 1; i >= 0 && TRANSITION_IS_GOTO (sp, i); --i)
        {

-         int k = temp_map[TRANSITION_SYMBOL (sp, i)]++;
-         from_state[k] = state;
+         int k = temp_map[TRANSITION_SYMBOL (sp, i) - ntokens]++;
+         from_state[k] = s;

          to_state[k] = sp->states[i]->number;
        }
     }
 
          to_state[k] = sp->states[i]->number;
        }
     }
 

-  XFREE (temp_map + ntokens);
+  XFREE (temp_map);

 }
 
 
 }
 
 


@@ -135,15 +138,15 @@ set_goto_map (void)
 `----------------------------------------------------------*/
 
 static int
 `----------------------------------------------------------*/
 
 static int

-map_goto (state_number_t state, symbol_number_t symbol)
+map_goto (state_number s0, symbol_number sym)

 {
   int high;
   int low;
   int middle;
 {
   int high;
   int low;
   int middle;

-  state_number_t s;
+  state_number s;

 
 

-  low = goto_map[symbol];
-  high = goto_map[symbol + 1] - 1;
+  low = goto_map[sym - ntokens];
+  high = goto_map[sym - ntokens + 1] - 1;

 
   for (;;)
     {
 
   for (;;)
     {


@@ -151,9 +154,9 @@ map_goto (state_number_t state, symbol_number_t symbol)
        abort ();
       middle = (low + high) / 2;
       s = from_state[middle];
        abort ();
       middle = (low + high) / 2;
       s = from_state[middle];

-      if (s == state)
+      if (s == s0)

        return middle;
        return middle;

-      else if (s < state)
+      else if (s < s0)

        low = middle + 1;
       else
        high = middle - 1;
        low = middle + 1;
       else
        high = middle - 1;


@@ -164,8 +167,8 @@ map_goto (state_number_t state, symbol_number_t symbol)
 static void
 initialize_F (void)
 {
 static void
 initialize_F (void)
 {

-  goto_number_t **reads = XCALLOC (goto_number_t *, ngotos);
-  goto_number_t *edge = XCALLOC (goto_number_t, ngotos + 1);
+  goto_number **reads = CALLOC (reads, ngotos);
+  goto_number *edge = CALLOC (edge, ngotos + 1);

   int nedges = 0;
 
   int i;
   int nedges = 0;
 
   int i;


@@ -174,8 +177,8 @@ initialize_F (void)
 
   for (i = 0; i < ngotos; i++)
     {
 
   for (i = 0; i < ngotos; i++)
     {

-      state_number_t stateno = to_state[i];
-      transitions_t *sp = states[stateno]->transitions;
+      state_number stateno = to_state[i];
+      transitions *sp = states[stateno]->transitions;

 
       int j;
       FOR_EACH_SHIFT (sp, j)
 
       int j;
       FOR_EACH_SHIFT (sp, j)


@@ -183,14 +186,14 @@ initialize_F (void)
 
       for (; j < sp->num; j++)
        {
 
       for (; j < sp->num; j++)
        {

-         symbol_number_t symbol = TRANSITION_SYMBOL (sp, j);
-         if (nullable[symbol])
-           edge[nedges++] = map_goto (stateno, symbol);
+         symbol_number sym = TRANSITION_SYMBOL (sp, j);
+         if (nullable[sym - ntokens])
+           edge[nedges++] = map_goto (stateno, sym);

        }
 
       if (nedges)
        {
        }
 
       if (nedges)
        {

-         reads[i] = XCALLOC (goto_number_t, nedges + 1);
+         CALLOC (reads[i], nedges + 1);

          memcpy (reads[i], edge, nedges * sizeof (edge[0]));
          reads[i][nedges] = -1;
          nedges = 0;
          memcpy (reads[i], edge, nedges * sizeof (edge[0]));
          reads[i][nedges] = -1;
          nedges = 0;


@@ -208,13 +211,13 @@ initialize_F (void)
 
 
 static void
 
 
 static void

-add_lookback_edge (state_t *state, rule_t *rule, int gotono)
+add_lookback_edge (state *s, rule *r, int gotono)

 {
 {

-  int r = state_reduction_find (state, rule);
-  goto_list_t *sp = XCALLOC (goto_list_t, 1);
-  sp->next = lookback[(state->reductions->lookaheads - LA) + r];
+  int ri = state_reduction_find (s, r);
+  goto_list *sp = MALLOC (sp, 1);
+  sp->next = lookback[(s->reductions->lookaheads - LA) + ri];

   sp->value = gotono;
   sp->value = gotono;

-  lookback[(state->reductions->lookaheads - LA) + r] = sp;
+  lookback[(s->reductions->lookaheads - LA) + ri] = sp;

 }
 
 
 }
 
 


@@ -222,35 +225,35 @@ add_lookback_edge (state_t *state, rule_t *rule, int gotono)
 static void
 build_relations (void)
 {
 static void
 build_relations (void)
 {

-  goto_number_t *edge = XCALLOC (goto_number_t, ngotos + 1);
-  state_number_t *states1 = XCALLOC (state_number_t, ritem_longest_rhs () + 1);
+  goto_number *edge = CALLOC (edge, ngotos + 1);
+  state_number *states1 = CALLOC (states1, ritem_longest_rhs () + 1);

   int i;
 
   int i;
 

-  includes = XCALLOC (goto_number_t *, ngotos);
+  CALLOC (includes, ngotos);

 
   for (i = 0; i < ngotos; i++)
     {
       int nedges = 0;
 
   for (i = 0; i < ngotos; i++)
     {
       int nedges = 0;

-      symbol_number_t symbol1 = states[to_state[i]]->accessing_symbol;
-      rule_t **rulep;
+      symbol_number symbol1 = states[to_state[i]]->accessing_symbol;
+      rule **rulep;

 
 

-      for (rulep = derives[symbol1]; *rulep; rulep++)
+      for (rulep = derives[symbol1 - ntokens]; *rulep; rulep++)

        {
          int done;
          int length = 1;
        {
          int done;
          int length = 1;

-         item_number_t *rp;
-         state_t *state = states[from_state[i]];
-         states1[0] = state->number;
+         item_number *rp;
+         state *s = states[from_state[i]];
+         states1[0] = s->number;

 
          for (rp = (*rulep)->rhs; *rp >= 0; rp++)
            {
 
          for (rp = (*rulep)->rhs; *rp >= 0; rp++)
            {

-             state = transitions_to (state->transitions,
-                                     item_number_as_symbol_number (*rp));
-             states1[length++] = state->number;
+             s = transitions_to (s->transitions,
+                                 item_number_as_symbol_number (*rp));
+             states1[length++] = s->number;

            }
 
            }
 

-         if (!state->consistent)
-           add_lookback_edge (state, *rulep, i);
+         if (!s->consistent)
+           add_lookback_edge (s, *rulep, i);

 
          length--;
          done = 0;
 
          length--;
          done = 0;


@@ -261,10 +264,10 @@ build_relations (void)
              /* JF added rp>=ritem &&   I hope to god its right! */
              if (rp >= ritem && ISVAR (*rp))
                {
              /* JF added rp>=ritem &&   I hope to god its right! */
              if (rp >= ritem && ISVAR (*rp))
                {

-                 /* Downcasting from item_number_t to symbol_number_t. */
+                 /* Downcasting from item_number to symbol_number.  */

                  edge[nedges++] = map_goto (states1[--length],
                                             item_number_as_symbol_number (*rp));
                  edge[nedges++] = map_goto (states1[--length],
                                             item_number_as_symbol_number (*rp));

-                 if (nullable[*rp])
+                 if (nullable[*rp - ntokens])

                    done = 0;
                }
            }
                    done = 0;
                }
            }


@@ -273,7 +276,7 @@ build_relations (void)
       if (nedges)
        {
          int j;
       if (nedges)
        {
          int j;

-         includes[i] = XCALLOC (goto_number_t, nedges + 1);
+         CALLOC (includes[i], nedges + 1);

          for (j = 0; j < nedges; j++)
            includes[i][j] = edge[j];
          includes[i][nedges] = -1;
          for (j = 0; j < nedges; j++)
            includes[i][j] = edge[j];
          includes[i][nedges] = -1;


@@ -306,7 +309,7 @@ static void
 compute_lookaheads (void)
 {
   size_t i;
 compute_lookaheads (void)
 {
   size_t i;

-  goto_list_t *sp;
+  goto_list *sp;

 
   for (i = 0; i < nLA; i++)
     for (sp = lookback[i]; sp; sp = sp->next)
 
   for (i = 0; i < nLA; i++)
     for (sp = lookback[i]; sp; sp = sp->next)


@@ -314,25 +317,25 @@ compute_lookaheads (void)
 
   /* Free LOOKBACK. */
   for (i = 0; i < nLA; i++)
 
   /* Free LOOKBACK. */
   for (i = 0; i < nLA; i++)

-    LIST_FREE (goto_list_t, lookback[i]);
+    LIST_FREE (goto_list, lookback[i]);

 
   XFREE (lookback);
   bitsetv_free (F);
 }
 
 
 
   XFREE (lookback);
   bitsetv_free (F);
 }
 
 

-/*---------------------------------------------------------------.
-| Count the number of lookaheads required for STATE (NLOOKAHEADS |
-| member).                                                       |
-`---------------------------------------------------------------*/
+/*-----------------------------------------------------------.
+| Count the number of lookaheads required for S (NLOOKAHEADS |
+| member).                                                   |
+`-----------------------------------------------------------*/

 
 static int
 
 static int

-state_lookaheads_count (state_t *state)
+state_lookaheads_count (state *s)

 {
   int k;
   int nlookaheads = 0;
 {
   int k;
   int nlookaheads = 0;

-  reductions_t *rp = state->reductions;
-  transitions_t *sp = state->transitions;
+  reductions *rp = s->reductions;
+  transitions *sp = s->transitions;

 
   /* We need a lookahead either to distinguish different
      reductions (i.e., there are two or more), or to distinguish a
 
   /* We need a lookahead either to distinguish different
      reductions (i.e., there are two or more), or to distinguish a


@@ -343,12 +346,12 @@ state_lookaheads_count (state_t *state)
          !TRANSITION_IS_DISABLED (sp, 0) && TRANSITION_IS_SHIFT (sp, 0)))
     nlookaheads += rp->num;
   else
          !TRANSITION_IS_DISABLED (sp, 0) && TRANSITION_IS_SHIFT (sp, 0)))
     nlookaheads += rp->num;
   else

-    state->consistent = 1;
+    s->consistent = 1;

 
   for (k = 0; k < sp->num; k++)
     if (!TRANSITION_IS_DISABLED (sp, k) && TRANSITION_IS_ERROR (sp, k))
       {
 
   for (k = 0; k < sp->num; k++)
     if (!TRANSITION_IS_DISABLED (sp, k) && TRANSITION_IS_ERROR (sp, k))
       {

-       state->consistent = 0;
+       s->consistent = 0;

        break;
       }
 
        break;
       }
 


@@ -363,7 +366,7 @@ state_lookaheads_count (state_t *state)
 static void
 initialize_LA (void)
 {
 static void
 initialize_LA (void)
 {

-  state_number_t i;
+  state_number i;

   bitsetv pLA;
 
   /* Compute the total number of reductions requiring a lookahead.  */
   bitsetv pLA;
 
   /* Compute the total number of reductions requiring a lookahead.  */


@@ -375,7 +378,7 @@ initialize_LA (void)
     nLA = 1;
 
   pLA = LA = bitsetv_create (nLA, ntokens, BITSET_FIXED);
     nLA = 1;
 
   pLA = LA = bitsetv_create (nLA, ntokens, BITSET_FIXED);

-  lookback = XCALLOC (goto_list_t *, nLA);
+  CALLOC (lookback, nLA);

 
   /* Initialize the members LOOKAHEADS for each state which reductions
      require lookaheads.  */
 
   /* Initialize the members LOOKAHEADS for each state which reductions
      require lookaheads.  */


@@ -398,12 +401,12 @@ initialize_LA (void)
 static void
 lookaheads_print (FILE *out)
 {
 static void
 lookaheads_print (FILE *out)
 {

-  state_number_t i;
+  state_number i;

   int j, k;
   fprintf (out, "Lookaheads: BEGIN\n");
   for (i = 0; i < nstates; ++i)
     {
   int j, k;
   fprintf (out, "Lookaheads: BEGIN\n");
   for (i = 0; i < nstates; ++i)
     {

-      reductions_t *reds = states[i]->reductions;
+      reductions *reds = states[i]->reductions;

       bitset_iterator iter;
       int nlookaheads = 0;
 
       bitset_iterator iter;
       int nlookaheads = 0;
 


@@ -445,7 +448,7 @@ lalr (void)
 void
 lalr_free (void)
 {
 void
 lalr_free (void)
 {

-  state_number_t s;
+  state_number s;

   for (s = 0; s < nstates; ++s)
     states[s]->reductions->lookaheads = NULL;
   bitsetv_free (LA);
   for (s = 0; s < nstates; ++s)
     states[s]->reductions->lookaheads = NULL;
   bitsetv_free (LA);