ldbl-128ibm-compat: Add tests for strfroml, strtold, and wcstold

Since the commit

commit 86a0f56158
Author: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Date:   Thu Jun 28 13:57:50 2018 +0530

    ldbl-128ibm-compat: Introduce ieee128 symbols

IEEE long double versions of strfroml, strtold, and wcstold have been
prepared, but not exposed (which will only happen when the full support
for IEEE long double is complete).  This patch adds tests for these
functions in both IBM and IEEE long double mode.

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

sysdeps/ieee754/ldbl-128ibm-compat/Makefile

@@ -6,6 +6,14 @@ ldbl-extra-routines += fwscanf \
 		       vwscanf
 endif
 
+ifeq ($(subdir),wcsmbs)
+tests-internal += test-wcstold-ibm128 test-wcstold-ieee128
+CFLAGS-test-wcstold-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
+CFLAGS-test-wcstold-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+
+$(objpfx)test-wcstold-ieee128: gnulib-tests += $(f128-loader-link)
+endif
+
 ifeq ($(subdir),stdio-common)
 ldbl-extra-routines += printf_size \
 		       asprintf \
@@ -230,6 +238,12 @@ CFLAGS-test-strfmon-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
 CFLAGS-test-strfmon-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 $(objpfx)tst-strfmon-ibm128.out: $(gen-locales)
 $(objpfx)tst-strfmon-ieee128.out: $(gen-locales)
+
+tests-internal += test-strfrom-ibm128 test-strfrom-ieee128
+CFLAGS-test-strfrom-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
+CFLAGS-test-strfrom-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+
+$(objpfx)test-strfrom-ieee128: gnulib-tests += $(f128-loader-link)
 endif
 
 # Add IEEE binary128 files as make targets.

sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ibm128.c

@@ -0,0 +1 @@
+#include <test-strfrom-ldbl-compat.c>

sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ieee128.c

@@ -0,0 +1 @@
+#include <test-strfrom-ldbl-compat.c>

sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ldbl-compat.c

@@ -0,0 +1,49 @@
+/* Test for the long double variants of strfroml and strtold.
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  int written;
+  char buffer[64];
+  char *bufptr = buffer;
+  const char *expected = "-1.0000000000";
+  long double read;
+
+  /* Write to the buffer.  */
+  written = strfroml (bufptr, 64, "%.10f", (long double) -1);
+  if (written < 0)
+    support_record_failure ();
+
+  /* Compare against the expected output.  */
+  TEST_COMPARE_STRING (expected, buffer);
+
+  /* Read from the buffer.  */
+  read = strtold (expected, NULL);
+
+  if (read != -1.0L)
+    support_record_failure ();
+
+  return 0;
+}
+
+#include <support/test-driver.c>

sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ibm128.c

@@ -0,0 +1 @@
+#include <test-wcstold-ldbl-compat.c>

sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ieee128.c

@@ -0,0 +1 @@
+#include <test-wcstold-ldbl-compat.c>

sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ldbl-compat.c

@@ -0,0 +1,36 @@
+/* Test for the long double variant of wcstold.
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <wchar.h>
+
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  const wchar_t *input = L"-1.0000000000";
+  long double read;
+
+  read = wcstold (input, NULL);
+  if (read != -1.0L)
+    support_record_failure ();
+
+  return 0;
+}
+
+#include <support/test-driver.c>