[PATCH] POSIX01: put v*scanf() functions under _ISOC99_SOURCE domain

ISO C99 requires the presence of the vscanf(), vfscanf(), and vsscanf()
functions. NetBSD until now hiddes their under its own macros. We'll put their
under ISO C99 domain as well.
---
 include/stdio.h |   25 +++++++++++++++++--------
 1 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/include/stdio.h b/include/stdio.h
index 257213e..9c7dc79 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -360,6 +360,23 @@ __END_DECLS
 #endif /* _XOPEN_SOURCE >= 500 || _LARGEFILE_SOURCE || _NETBSD_SOURCE */
 
 /*
+ * Functions defined in at least ISO C99. Still put under _NETBSD_SOURCE due to
+ * backward compatible.
+ */
+#if defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
+__BEGIN_DECLS
+int	 vscanf(const char * __restrict, _BSD_VA_LIST_)
+	    __attribute__((__format__(__scanf__, 1, 0)));
+int	 vfscanf(FILE * __restrict, const char * __restrict,
+	    _BSD_VA_LIST_)
+	    __attribute__((__format__(__scanf__, 2, 0)));
+int	 vsscanf(const char * __restrict, const char * __restrict,
+	    _BSD_VA_LIST_)
+	    __attribute__((__format__(__scanf__, 2, 0)));
+__END_DECLS
+#endif /* _ISOC99_SOURCE || _NETBSD_SOURCE */
+
+/*
  * Routines that are purely local.
  */
 #if defined(_NETBSD_SOURCE)
@@ -381,14 +398,6 @@ int	 setlinebuf(FILE *);
 int	 vasprintf(char ** __restrict, const char * __restrict,
 	    _BSD_VA_LIST_)
 	    __attribute__((__format__(__printf__, 2, 0)));
-int	 vscanf(const char * __restrict, _BSD_VA_LIST_)
-	    __attribute__((__format__(__scanf__, 1, 0)));
-int	 vfscanf(FILE * __restrict, const char * __restrict,
-	    _BSD_VA_LIST_)
-	    __attribute__((__format__(__scanf__, 2, 0)));
-int	 vsscanf(const char * __restrict, const char * __restrict,
-	    _BSD_VA_LIST_)
-	    __attribute__((__format__(__scanf__, 2, 0)));
 const char *fmtcheck(const char *, const char *)
 	    __attribute__((__format_arg__(2)));
 __END_DECLS
-- 
1.5.2.5