Port to SunOS 4.1.4, which lacks strtoul and strerror.

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index aa73de8bb4cdac994ac2dc71f30cdfe58ab48332..6b247b7f2d845a764faadfc5ea3adefd79c51d97 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -1,7 +1,7 @@
 /* Input parser for Bison
 
-   Copyright (C) 1984, 1986, 1989, 1992, 1998, 2000, 2001, 2002
-   Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 1992, 1998, 2000, 2001, 2002, 2003,
+   2005 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -17,8 +17,8 @@
 
    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.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #include "system.h"
 
@@ -36,25 +36,28 @@
 #include "symtab.h"
 
 static symbol_list *grammar = NULL;
-static int start_flag = 0;
+static bool start_flag = false;
 merger_list *merge_functions;
 
-/* Nonzero if %union has been seen.  */
-int typed = 0;
+/* Has %union been seen?  */
+bool typed = false;
+
+/* Should rules have a default precedence?  */
+bool default_prec = true;
 \f
 /*-----------------------.
 | Set the start symbol.  |
 `-----------------------*/
 
 void
-grammar_start_symbol_set (symbol *s, location loc)
+grammar_start_symbol_set (symbol *sym, location loc)
 {
   if (start_flag)
     complain_at (loc, _("multiple %s declarations"), "%start");
   else
     {
-      start_flag = 1;
-      startsymbol = s;
+      start_flag = true;
+      startsymbol = sym;
       startsymbol_location = loc;
     }
 }
@@ -71,36 +74,13 @@ prologue_augment (const char *prologue, location loc)
   struct obstack *oout =
     !typed ? &pre_prologue_obstack : &post_prologue_obstack;
 
-  obstack_fgrow1 (oout, "]b4_syncline([[%d]], [[", loc.start.line);
+  obstack_fgrow1 (oout, "]b4_syncline(%d, [[", loc.start.line);
   MUSCLE_OBSTACK_SGROW (oout,
                        quotearg_style (c_quoting_style, loc.start.file));
   obstack_sgrow (oout, "]])[\n");
   obstack_sgrow (oout, prologue);
 }
 
-
-
-
-/*----------------------.
-| Handle the epilogue.  |
-`----------------------*/
-
-void
-epilogue_augment (const char *epilogue, location loc)
-{
-  char *extension = NULL;
-  obstack_fgrow1 (&muscle_obstack, "]b4_syncline([[%d]], [[", loc.start.line);
-  MUSCLE_OBSTACK_SGROW (&muscle_obstack,
-                       quotearg_style (c_quoting_style, loc.start.file));
-  obstack_sgrow (&muscle_obstack, "]])[\n");
-  obstack_sgrow (&muscle_obstack, epilogue);
-  obstack_1grow (&muscle_obstack, 0);
-  extension = obstack_finish (&muscle_obstack);
-  muscle_grow ("epilogue", extension, "");
-  obstack_free (&muscle_obstack, extension);
-}
-
-
 \f
 
 /*-------------------------------------------------------------------.
@@ -128,7 +108,7 @@ get_merge_function (uniqstr name, uniqstr type, location loc)
       break;
   if (syms->next == NULL)
     {
-      MALLOC (syms->next, 1);
+      syms->next = xmalloc (sizeof syms->next[0]);
       syms->next->name = uniqstr_new (name);
       syms->next->type = uniqstr_new (type);
       syms->next->next = NULL;
@@ -179,9 +159,9 @@ free_merger_functions (void)
 `-------------------------------------------------------------------*/
 
 /* The (currently) last symbol of GRAMMAR. */
-symbol_list *grammar_end = NULL;
+static symbol_list *grammar_end = NULL;
 
-/* Append S to the GRAMMAR. */
+/* Append SYM to the grammar.  */
 void
 grammar_symbol_append (symbol *sym, location loc)
 {
@@ -199,7 +179,7 @@ grammar_symbol_append (symbol *sym, location loc)
    CURRENT_RULE points to the first LHS of the current rule, while
    PREVIOUS_RULE_END points to the *end* of the previous rule (NULL).  */
 symbol_list *current_rule = NULL;
-symbol_list *previous_rule_end = NULL;
+static symbol_list *previous_rule_end = NULL;
 
 
 /*----------------------------------------------.
@@ -213,7 +193,7 @@ grammar_rule_begin (symbol *lhs, location loc)
     {
       startsymbol = lhs;
       startsymbol_location = loc;
-      start_flag = 1;
+      start_flag = true;
     }
 
   /* Start a new rule and record its lhs.  */
@@ -407,8 +387,8 @@ packgram (void)
   rule_number ruleno = 0;
   symbol_list *p = grammar;
 
-  CALLOC (ritem, nritems);
-  CALLOC (rules, nrules);
+  ritem = xnmalloc (nritems, sizeof *ritem);
+  rules = xnmalloc (nrules, sizeof *rules);
 
   while (p)
     {
@@ -417,12 +397,14 @@ packgram (void)
       rules[ruleno].number = ruleno;
       rules[ruleno].lhs = p->sym;
       rules[ruleno].rhs = ritem + itemno;
+      rules[ruleno].prec = NULL;
+      rules[ruleno].dprec = p->dprec;
+      rules[ruleno].merger = p->merger;
+      rules[ruleno].precsym = NULL;
       rules[ruleno].location = p->location;
       rules[ruleno].useful = true;
       rules[ruleno].action = p->action;
       rules[ruleno].action_location = p->action_location;
-      rules[ruleno].dprec = p->dprec;
-      rules[ruleno].merger = p->merger;
 
       p = p->next;
       while (p && p->sym)
@@ -432,7 +414,7 @@ packgram (void)
          ritem[itemno++] = symbol_number_as_item_number (p->sym->number);
          /* A rule gets by default the precedence and associativity
             of the last token in it.  */
-         if (p->sym->class == token_sym)
+         if (p->sym->class == token_sym && default_prec)
            rules[ruleno].prec = p->sym;
          if (p)
            p = p->next;