ldbl-128ibm-compat: Add wide character scanning functions

Similarly to what was done for regular character scanning functions,
this patch uses the new mode mask, SCANF_LDBL_USES_FLOAT128, in the
'mode' argument of the wide characters scanning function,
__vfwscanf_internal (which is also extended to support scanning
floating-point values with IEEE binary128, by redirecting calls to
__wcstold_internal to __wcstof128_internal).

Tested for powerpc64le.

Reviewed-By: Paul E. Murphy <murphyp@linux.ibm.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vswscanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vswscanf.c
new file mode 100644
index 0000000000..c08c7e3c89
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vswscanf.c
@@ -0,0 +1,32 @@
+/* Wrapper for vswscanf.  IEEE128 version.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libioP.h>
+#include <wchar.h>
+#include <strfile.h>
+
+extern int
+___ieee128_vswscanf (const wchar_t *string, const wchar_t *format,
+		     va_list ap)
+{
+  _IO_strfile sf;
+  struct _IO_wide_data wd;
+  FILE *fp = _IO_strfile_readw (&sf, &wd, string);
+  return __vfwscanf_internal (fp, format, ap, SCANF_LDBL_USES_FLOAT128);
+}
+strong_alias (___ieee128_vswscanf, __vswscanfieee128)