* libc/include/stdio.h (__VALIST): Guard against multiple definition.

* libc/include/wchar.h: Include stdarg.h.
	(__VALIST): Define conditionally.
	(fwprintf, swprintf, vfwprintf, vswprintf, vwprintf, wprintf: Declare.
	(_fwprintf_r, _swprintf_r, _vfwprintf_r, _vswprintf_r, _vwprintf_r,
	 _wprintf_r): Declare.
	* libc/stdio/Makefile.am: Add new files.
	* libc/stdio/Makefile.in: Regenerate.
	* libc/stdio/fwprintf.c: New file.
	* libc/stdio/local.h (_svfwprintf_r, _svfiwprintf_r): Declare.
	(__CH_CLASS, __STATE, __ACTION): Move definition from vfprintf.c here
	and move to the __ namespace.
	(__chclass, __state_table, __action_table): Declare.
	* libc/stdio/stdio.tex: Add new documentation references.
	* libc/stdio/swprintf.c: New file.
	* libc/stdio/vfprintf.c (__SPRINT): New macro to call the right
	__sprint_r function according to compilation unit.  Use throughout.
	(__ssprint_r): Rename STRING_ONLY variant from __sprint_r.
	Make externaly available.  Only define if INTEGER_ONLY is defined.
	(__sprint_r): Make externaly available.  Only define if INTEGER_ONLY
	is defined.  Handle stream orientation.
	(__sbprintf): Copy FILE's _flags2 member as well.
	(__chclass, __state_table, __action_table): Prepend __ to name and
	make externally available.
	* libc/stdio/vfwprintf.c: New file.
	* libc/stdio/vswprintf.c: New file.
	* libc/stdio/vwprintf.c: New file.
	* libc/stdio/wprintf.c: New file.

newlib/libc/stdio/vswprintf.c

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+/* doc in vfwprintf.c */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "%W% (Berkeley) %G%";
+#endif /* LIBC_SCCS and not lint */
+
+#include <_ansi.h>
+#include <reent.h>
+#include <stdio.h>
+#include <wchar.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <errno.h>
+
+int
+_DEFUN(_vswprintf_r, (ptr, str, size, fmt, ap),
+       struct _reent *ptr _AND
+       wchar_t *str          _AND
+       size_t size        _AND
+       const wchar_t *fmt   _AND
+       va_list ap)
+{
+  int ret;
+  FILE f;
+
+  if (size > INT_MAX / sizeof (wchar_t))
+    {
+      ptr->_errno = EOVERFLOW;
+      return EOF;
+    }
+  f._flags = __SWR | __SSTR;
+  f._bf._base = f._p = (unsigned char *) str;
+  f._bf._size = f._w = (size > 0 ? (size - 1) * sizeof (wchar_t) : 0);
+  f._file = -1;  /* No file. */
+  ret = _svfwprintf_r (ptr, &f, fmt, ap);
+  if (ret < EOF)
+    ptr->_errno = EOVERFLOW;
+  if (size > 0)
+    *f._p = 0;
+  return ret;
+}
+
+#ifndef _REENT_ONLY
+
+int
+_DEFUN(vswprintf, (str, size, fmt, ap),
+       wchar_t *str        _AND
+       size_t size      _AND
+       const wchar_t *fmt _AND
+       va_list ap)
+{
+  return _vswprintf_r (_REENT, str, size, fmt, ap);
+}
+
+#endif /* !_REENT_ONLY */