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[bison.git] / src / gram.c

diff --git a/src/gram.c b/src/gram.c
index 05dc665c3991e1e7967f084dfe81319d2bbfd8be..f6f39f5a7a0ce7705f204addd781fd596e536d4a 100644 (file)
--- a/src/gram.c
+++ b/src/gram.c
@@ -1,24 +1,29 @@
 /* Allocate input grammar variables for bison,
-   Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
+   Copyright 1984, 1986, 1989, 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, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, 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.  */
 
 
+#include "system.h"
+#include "gram.h"
+#include "symtab.h"
+#include "reader.h"
+
 /* comments for these variables are in gram.h  */
 
 int nitems;
@@ -27,20 +32,15 @@ int nsyms;
 int ntokens;
 int nvars;
 
-short *ritem;
-short *rlhs;
-short *rrhs;
-short *rprec;
-short *rprecsym;
-short *sprec;
-short *rassoc;
-short *sassoc;
-short *token_translations;
-short *rline;
+short *ritem = NULL;
+int nritems;
 
-int start_symbol;
+rule_t *rules = NULL;
 
-int translations;
+struct bucket **symbols = NULL;
+short *token_translations = NULL;
+
+int start_symbol;
 
 int max_user_token_number;
 
@@ -50,10 +50,49 @@ int pure_parser;
 
 int error_token_number;
 
-/* This is to avoid linker problems which occur on VMS when using GCC,
-   when the file in question contains data definitions only.  */
 
-static void
-dummy (void)
+/*------------------------.
+| Dump RITEM for traces.  |
+`------------------------*/
+
+void
+ritem_print (FILE *out)
+{
+  int i;
+  fputs ("RITEM\n", out);
+  for (i = 0; i < nritems; ++i)
+    if (ritem[i] >= 0)
+      fprintf (out, "  %s", symbols[ritem[i]]->tag);
+    else
+      fprintf (out, "  (rule %d)\n", -ritem[i] - 1);
+  fputs ("\n\n", out);
+}
+
+
+/*------------------------------------------.
+| Return the size of the longest rule RHS.  |
+`------------------------------------------*/
+
+size_t
+ritem_longest_rhs (void)
 {
+  int length;
+  int max;
+  int i;
+
+  length = 0;
+  max = 0;
+  for (i = 0; i < nritems; ++i)
+    if (ritem[i] >= 0)
+      {
+       length++;
+      }
+    else
+      {
+       if (length > max)
+         max = length;
+       length = 0;
+      }
+
+  return max;
 }