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Date:      Thu, 9 Feb 2012 16:55:20 +0000 (UTC)
From:      Ed Schouten <ed@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org
Subject:   svn commit: r231289 - in stable/9/contrib/gcclibs/libcpp: . include
Message-ID:  <201202091655.q19GtK7H010429@svn.freebsd.org>
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Author: ed
Date: Thu Feb  9 16:55:20 2012
New Revision: 231289
URL: http://svn.freebsd.org/changeset/base/231289

Log:
  MFC r228474:
  
    Add support for __COUNTER__.
  
    __COUNTER__ allows one to obtain incrementing (read: unique) numbers
    from the C preprocesor. This is useful when implementing things like a
    robust implementation of CTASSERT(), which currently fails when using
    it more than once on a single line of code. Probably not likely to cause
    any breakage, but still.
  
    __COUNTER__ was also added to GCC 4.3, but since that implementation is
    GPLv3 licensed, I took the liberty of implementing it without looking at
    any upstream sources. Therefore, this version is licensed under the same
    license as the rest of the code; GPLv2.

Modified:
  stable/9/contrib/gcclibs/libcpp/include/cpplib.h
  stable/9/contrib/gcclibs/libcpp/init.c
  stable/9/contrib/gcclibs/libcpp/internal.h
  stable/9/contrib/gcclibs/libcpp/macro.c
Directory Properties:
  stable/9/contrib/gcclibs/   (props changed)

Modified: stable/9/contrib/gcclibs/libcpp/include/cpplib.h
==============================================================================
--- stable/9/contrib/gcclibs/libcpp/include/cpplib.h	Thu Feb  9 16:54:06 2012	(r231288)
+++ stable/9/contrib/gcclibs/libcpp/include/cpplib.h	Thu Feb  9 16:55:20 2012	(r231289)
@@ -555,7 +555,8 @@ enum builtin_type
   BT_TIME,			/* `__TIME__' */
   BT_STDC,			/* `__STDC__' */
   BT_PRAGMA,			/* `_Pragma' operator */
-  BT_TIMESTAMP			/* `__TIMESTAMP__' */
+  BT_TIMESTAMP,			/* `__TIMESTAMP__' */
+  BT_COUNTER			/* `__COUNTER__' */
 };
 
 #define CPP_HASHNODE(HNODE)	((cpp_hashnode *) (HNODE))

Modified: stable/9/contrib/gcclibs/libcpp/init.c
==============================================================================
--- stable/9/contrib/gcclibs/libcpp/init.c	Thu Feb  9 16:54:06 2012	(r231288)
+++ stable/9/contrib/gcclibs/libcpp/init.c	Thu Feb  9 16:55:20 2012	(r231289)
@@ -308,6 +308,7 @@ static const struct builtin builtin_arra
   B("__BASE_FILE__",	 BT_BASE_FILE),
   B("__LINE__",		 BT_SPECLINE),
   B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
+  B("__COUNTER__",	 BT_COUNTER),
   /* Keep builtins not used for -traditional-cpp at the end, and
      update init_builtins() if any more are added.  */
   B("_Pragma",		 BT_PRAGMA),

Modified: stable/9/contrib/gcclibs/libcpp/internal.h
==============================================================================
--- stable/9/contrib/gcclibs/libcpp/internal.h	Thu Feb  9 16:54:06 2012	(r231288)
+++ stable/9/contrib/gcclibs/libcpp/internal.h	Thu Feb  9 16:55:20 2012	(r231289)
@@ -448,6 +448,8 @@ struct cpp_reader
   /* A saved list of the defined macros, for dependency checking
      of precompiled headers.  */
   struct cpp_savedstate *savedstate;
+
+  unsigned int nextcounter;
 };
 
 /* Character classes.  Based on the more primitive macros in safe-ctype.h.

Modified: stable/9/contrib/gcclibs/libcpp/macro.c
==============================================================================
--- stable/9/contrib/gcclibs/libcpp/macro.c	Thu Feb  9 16:54:06 2012	(r231288)
+++ stable/9/contrib/gcclibs/libcpp/macro.c	Thu Feb  9 16:55:20 2012	(r231289)
@@ -262,6 +262,10 @@ _cpp_builtin_macro_text (cpp_reader *pfi
       else
 	result = pfile->time;
       break;
+
+    case BT_COUNTER:
+      number = pfile->nextcounter++;
+      break;
     }
 
   if (result == NULL)

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