--- /dev/null
+/*
+ * 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>
+
+#include "local.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; /* POSIX extension */
+ 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);
+ /* _svfwprintf_r() does not put in a terminating NUL, so add one if
+ * appropriate, which is whenever size is > 0. _svfwprintf_r() stops
+ * after n-1, so always just put at the end. */
+ if (size > 0) {
+ *(wchar_t *)f._p = L'\0'; /* terminate the string */
+ }
+ if(ret >= size) {
+ /* _svfwprintf_r() returns how many wide characters it would have printed
+ * if there were enough space. Return an error if too big to fit in str,
+ * unlike snprintf, which returns the size needed. */
+ ptr->_errno = EOVERFLOW; /* POSIX extension */
+ ret = -1;
+ }
+ 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 */