2007-03-07 Paolo Bonzini <bonzini@gnu.org>

[bison.git] / data / push.c

diff --git a/data/push.c b/data/push.c
index c51859f451c1c8f7c369a3079d6cfdc011474f86..ee9aa671432318e15ffedda98fbf5ce642845360 100644 (file)
--- a/data/push.c
+++ b/data/push.c
@@ -1,4 +1,4 @@
-m4_divert(-1)                                                -*- C -*-
+                                                             -*- C -*-
 
 # Yacc compatible skeleton for Bison
 
@@ -33,7 +33,6 @@ b4_use_push_for_pull_if([
   ])])
 
 m4_include(b4_pkgdatadir/[c.m4])
-b4_check_percent_code_qualifiers([[requires]], [[provides]], [[top]])
 
 ## ---------------- ##
 ## Default values.  ##
@@ -145,8 +144,8 @@ m4_define([b4_rhs_location],
 
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
-m4_divert(0)dnl
-@output b4_parser_file_name
+m4_divert_push(0)dnl
+@output(b4_parser_file_name@)
 b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
   [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
 
@@ -161,9 +160,7 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
    USER NAME SPACE" below.  */
 
 ]b4_identification
-m4_ifdef([b4_percent_code_top],
-[[/* Copy the %code "top" blocks.  */
-]b4_user_code([b4_percent_code_top])])[]dnl
+b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [[/* Substitute the variable and function names.  */
 ]b4_pull_if([[#define yyparse         ]b4_prefix[parse
@@ -201,17 +198,16 @@ m4_if(b4_prefix, [yy], [],
 # define YYTOKEN_TABLE ]b4_token_table[
 #endif
 
-]m4_ifdef([b4_percent_code_requires],
-[[/* Copy the %code "requires" blocks.  */
-]b4_user_code([b4_percent_code_requires])])[]dnl
+]b4_percent_code_get([[requires]])[]dnl
 
 b4_token_enums_defines(b4_tokens)[
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 ]m4_ifdef([b4_stype],
 [[typedef union ]b4_union_name[
+{
 ]b4_user_stype[
-       YYSTYPE;
+} YYSTYPE;
 # define YYSTYPE_IS_TRIVIAL 1]],
 [m4_if(b4_tag_seen_flag, 0,
 [[typedef int YYSTYPE;
@@ -254,16 +250,11 @@ b4_c_function_decl([[yypstate_delete]], [[void]],
                    [[[yypstate *yyps]], [[yyps]]])[
 #endif
 ]])
-m4_ifdef([b4_percent_code_provides],
-[[/* Copy the %code "provides" blocks.  */
-]b4_user_code([b4_percent_code_provides])])[]dnl
+b4_percent_code_get([[provides]])[]dnl
 
 [/* Copy the second part of user declarations.  */
 ]b4_user_post_prologue
-m4_ifdef([b4_percent_code],
-[[/* Copy the unqualified %code blocks.  */
-]b4_user_code([b4_percent_code])
-])[]dnl
+b4_percent_code_get[]dnl
 
 [#ifdef short
 # undef short
@@ -341,7 +332,8 @@ typedef short int yytype_int16;
 
 #if ! defined yyoverflow || YYERROR_VERBOSE
 
-/* The parser invokes alloca or malloc; define the necessary symbols.  */
+]b4_push_if([],
+[[/* The parser invokes alloca or malloc; define the necessary symbols.  */
 
 # ifdef YYSTACK_USE_ALLOCA
 #  if YYSTACK_USE_ALLOCA
@@ -366,7 +358,8 @@ typedef short int yytype_int16;
 #  endif
 # endif
 
-# ifdef YYSTACK_ALLOC
+]])dnl
+[# ifdef YYSTACK_ALLOC
    /* Pacify GCC's `empty if-body' warning.  */
 #  define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
 #  ifndef YYSTACK_ALLOC_MAXIMUM
@@ -757,12 +750,12 @@ do {                                                              \
   /* The symbols being reduced.  */
   for (yyi = 0; yyi < yynrhs; yyi++)
     {
-      fprintf (stderr, "   $%d = ", yyi + 1);
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
       yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
                       &]b4_rhs_value(yynrhs, yyi + 1)[
                       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
                       b4_user_args[);
-      fprintf (stderr, "\n");
+      YYFPRINTF (stderr, "\n");
     }
 }
 
@@ -1098,13 +1091,20 @@ b4_push_if(
 ]b4_locations_if([[  YYLTYPE yylloc;
 ]])])[
   if (yyps == 0)
-     yyps_local = yypstate_new ();
-   else
-     yyps_local = yyps;
-   do {
-     yychar = YYLEX;
-     yystatus =
-       yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
+    {
+      yyps_local = yypstate_new ();
+      if (!yyps_local)
+        {
+          yyerror (]b4_yyerror_args[YY_("memory exhausted"));
+          return 2;
+        }
+    }
+  else
+    yyps_local = yyps;
+  do {
+    yychar = YYLEX;
+    yystatus =
+      yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
   } while (yystatus == YYPUSH_MORE);
   if (yyps == 0)
     yypstate_delete (yyps_local);
@@ -1115,6 +1115,8 @@ b4_push_if(
 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
 {
   yypstate *yyps = (yypstate *) malloc (sizeof *yyps);
+  if (!yyps)
+    return 0;
   yyps->yynew = 1;
   return yyps;
 }
@@ -1158,8 +1160,8 @@ b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
 b4_c_function_def([yyparse], [int], b4_parse_param)
 #endif])[
 {
-  ]b4_pure_if([b4_declare_scanner_communication_variables])
-  b4_push_if([b4_pure_if([], [[  int yypushed_char = yychar;
+]b4_pure_if([b4_declare_scanner_communication_variables])
+b4_push_if([b4_pure_if([], [[  int yypushed_char = yychar;
   YYSTYPE yypushed_val = yylval;
   ]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
 ]])])],
@@ -1659,21 +1661,20 @@ yypushreturn:
 
 ]b4_epilogue
 b4_defines_if(
-[@output b4_spec_defines_file
+[@output(b4_spec_defines_file@)
 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
   [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
 
-m4_ifdef([b4_percent_code_requires],
-[[/* Copy the %code "requires" blocks.  */
-]b4_user_code([b4_percent_code_requires])])[]dnl
+b4_percent_code_get([[requires]])[]dnl
 
 b4_token_enums_defines(b4_tokens)
 
 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 ]m4_ifdef([b4_stype],
 [[typedef union ]b4_union_name[
+{
 ]b4_user_stype[
-       YYSTYPE;
+} YYSTYPE;
 # define YYSTYPE_IS_TRIVIAL 1]],
 [m4_if(b4_tag_seen_flag, 0,
 [[typedef int YYSTYPE;
@@ -1722,7 +1723,6 @@ b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
                    [[b4_prefix[pstate *yyps]], [[yyps]]])[
 #endif
 ]])
-m4_ifdef([b4_percent_code_provides],
-[[/* Copy the %code "provides" blocks.  */
-]b4_user_code([b4_percent_code_provides])])[]
+b4_percent_code_get([[provides]])[]dnl
 ])dnl b4_defines_if
+m4_divert_pop(0)