Comment change.

[bison.git] / bison.simple

diff --git a/bison.simple b/bison.simple
index c6d8b4dd08745e7427bb470aed5a2959646b3e7a..0fb74ce714ca9d8bfc43769acf87ea09d07c5567 100644 (file)
--- a/bison.simple
+++ b/bison.simple
@@ -2,11 +2,11 @@
 #line 3 "bison.simple"
 
 /* Skeleton output parser for bison,
-   Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman
+   Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.
 
    This program 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 1, or (at your option)
+   the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -18,6 +18,10 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+/* As a special exception, when this file is copied by Bison into a
+   Bison output file, you may use that output file without restriction.
+   This special exception was added by the Free Software Foundation
+   in version 1.24 of Bison.  */
 
 #ifndef alloca
 #ifdef __GNUC__
@@ -91,10 +95,18 @@ while (0)
 
 #ifdef YYPURE
 #ifdef YYLSP_NEEDED
+#ifdef YYLEX_PARAM
+#define YYLEX          yylex(&yylval, &yylloc, YYLEX_PARAM)
+#else
 #define YYLEX          yylex(&yylval, &yylloc)
+#endif
+#else /* not YYLSP_NEEDED */
+#ifdef YYLEX_PARAM
+#define YYLEX          yylex(&yylval, YYLEX_PARAM)
 #else
 #define YYLEX          yylex(&yylval)
 #endif
+#endif /* not YYLSP_NEEDED */
 #endif
 
 /* If nonreentrant, generate the variables here */
@@ -142,14 +154,14 @@ int yyparse (void);
 #endif
 \f
 #if __GNUC__ > 1               /* GNU C and GNU C++ define this.  */
-#define __yy_bcopy(FROM,TO,COUNT)      __builtin_memcpy(TO,FROM,COUNT)
+#define __yy_memcpy(FROM,TO,COUNT)     __builtin_memcpy(TO,FROM,COUNT)
 #else                          /* not GNU C or C++ */
 #ifndef __cplusplus
 
 /* This is the most reliable way to avoid incompatibilities
    in available built-in functions on various systems.  */
 static void
-__yy_bcopy (from, to, count)
+__yy_memcpy (from, to, count)
      char *from;
      char *to;
      int count;
@@ -167,7 +179,7 @@ __yy_bcopy (from, to, count)
 /* This is the most reliable way to avoid incompatibilities
    in available built-in functions on various systems.  */
 static void
-__yy_bcopy (char *from, char *to, int count)
+__yy_memcpy (char *from, char *to, int count)
 {
   register char *f = from;
   register char *t = to;
@@ -180,16 +192,31 @@ __yy_bcopy (char *from, char *to, int count)
 #endif
 #endif
 \f
-#line 184 "bison.simple"
+#line 192 "bison.simple"
+
+/* The user can define YYPARSE_PARAM as the name of an argument to be passed
+   into yyparse.  The argument should have type void *.
+   It should actually point to an object.
+   Grammar actions can access the variable by casting it
+   to the proper pointer type.  */
+
+#ifdef YYPARSE_PARAM
+#define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
+#else
+#define YYPARSE_PARAM
+#define YYPARSE_PARAM_DECL
+#endif
+
 int
-yyparse()
+yyparse(YYPARSE_PARAM)
+     YYPARSE_PARAM_DECL
 {
   register int yystate;
   register int yyn;
   register short *yyssp;
   register YYSTYPE *yyvsp;
   int yyerrstatus;     /*  number of tokens to shift before error messages enabled */
-  int yychar1;         /*  lookahead token as an internal (translated) token number */
+  int yychar1 = 0;             /*  lookahead token as an internal (translated) token number */
 
   short        yyssa[YYINITDEPTH];     /*  the state stack                     */
   YYSTYPE yyvsa[YYINITDEPTH];  /*  the semantic value stack            */
@@ -268,13 +295,20 @@ yynewstate:
 #ifdef yyoverflow
       /* Each stack pointer address is followed by the size of
         the data in use in that stack, in bytes.  */
+#ifdef YYLSP_NEEDED
+      /* This used to be a conditional around just the two extra args,
+        but that might be undefined if yyoverflow is a macro.  */
       yyoverflow("parser stack overflow",
                 &yyss1, size * sizeof (*yyssp),
                 &yyvs1, size * sizeof (*yyvsp),
-#ifdef YYLSP_NEEDED
                 &yyls1, size * sizeof (*yylsp),
-#endif
                 &yystacksize);
+#else
+      yyoverflow("parser stack overflow",
+                &yyss1, size * sizeof (*yyssp),
+                &yyvs1, size * sizeof (*yyvsp),
+                &yystacksize);
+#endif
 
       yyss = yyss1; yyvs = yyvs1;
 #ifdef YYLSP_NEEDED
@@ -291,12 +325,12 @@ yynewstate:
       if (yystacksize > YYMAXDEPTH)
        yystacksize = YYMAXDEPTH;
       yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
-      __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
+      __yy_memcpy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
       yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
-      __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
+      __yy_memcpy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
 #ifdef YYLSP_NEEDED
       yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
-      __yy_bcopy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
+      __yy_memcpy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
 #endif
 #endif /* no yyoverflow */
 
@@ -435,7 +469,8 @@ yydefault:
 /* Do a reduction.  yyn is the number of a rule to reduce with.  */
 yyreduce:
   yylen = yyr2[yyn];
-  yyval = yyvsp[1-yylen]; /* implement default value of the action */
+  if (yylen > 0)
+    yyval = yyvsp[1-yylen]; /* implement default value of the action */
 
 #if YYDEBUG != 0
   if (yydebug)
@@ -453,7 +488,7 @@ yyreduce:
 #endif
 
 $   /* the action file gets copied in in place of this dollarsign */
-#line 457 "bison.simple"
+#line 487 "bison.simple"
 \f
   yyvsp -= yylen;
   yyssp -= yylen;