ldbl-128ibm-compat: Add obstack printing functions

Similarly to the functions from the *printf family, this patch adds
implementations for __obstack_*printf* functions that set the
'mode_flags' parameter to PRINTF_LDBL_USES_FLOAT128, before making calls
to __vfprintf_internal (indirectly through __obstack_vprintf_internal).

Tested for powerpc64le.

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

1 files changed, 64 insertions, 0 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-obstack-ldbl-compat-template.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-obstack-ldbl-compat-template.c
new file mode 100644
index 0000000000..bc783094a6
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-obstack-ldbl-compat-template.c
@@ -0,0 +1,64 @@
+/* Test for the long double variants of obstrack*printf functions.
+   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 <malloc.h>
+#include <obstack.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include <support/check.h>
+
+#define obstack_chunk_alloc malloc
+#define obstack_chunk_free free
+
+static void
+do_test_call (void *last, ...)
+{
+  const char *expected = "-1.000000000000000000000000000000";
+  char *actual = NULL;
+  long double ld = -1;
+  struct obstack ob;
+  va_list ap;
+
+  obstack_init (&ob);
+  OBSTACK_FUNCTION OBSTACK_FUNCTION_PARAMS;
+  actual = (char *) obstack_finish (&ob);
+  TEST_VERIFY (strncmp (expected, actual, 33) == 0);
+  obstack_free (&ob, NULL);
+  actual = NULL;
+
+  obstack_init (&ob);
+  va_start (ap, last);
+  VOBSTACK_FUNCTION VOBSTACK_FUNCTION_PARAMS;
+  va_end (ap);
+  actual = (char *) obstack_finish (&ob);
+  TEST_VERIFY (strncmp (expected, actual, 33) == 0);
+  obstack_free (&ob, NULL);
+  actual = NULL;
+}
+
+static int
+do_test (void)
+{
+  long double ld = -1;
+  do_test_call (NULL, ld);
+  return 0;
+}
+
+#include <support/test-driver.c>