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

[Andy Shevchenko <andy.shevchenko%gmail.com@localhost>]

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