support: Add timespec.h

It adds useful functions for tests that use struct timespec.

Checked on x86_64-linux-gnu and i686-linux-gnu.

	* support/timespec.h: New file.  Provide timespec helper functions
	along with macros in the style of those in check.h.
	* support/timespec.c: New file.  Implement check functions declared
	in support/timespec.h.
	* support/timespec-add.c: New file from gnulib containing
	timespec_add implementation that handles overflow.
	* support/timespec-sub.c: New file from gnulib containing
	timespec_sub implementation that handles overflow.
	* support/README: Mention timespec.h.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/support/timespec.c b/support/timespec.c
new file mode 100644
index 0000000000..f1b88c1f4c
--- /dev/null
+++ b/support/timespec.c
@@ -0,0 +1,58 @@
+/* Support code for timespec checks.
+   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 <support/timespec.h>
+#include <stdio.h>
+
+void
+test_timespec_before_impl (const char *file, int line,
+			   const struct timespec left,
+			   const struct timespec right)
+{
+  if (left.tv_sec > right.tv_sec
+      || (left.tv_sec == right.tv_sec
+	  && left.tv_nsec > right.tv_nsec)) {
+    support_record_failure ();
+    const struct timespec diff = timespec_sub (left, right);
+    printf ("%s:%d: %ld.%09lds not before %ld.%09lds "
+	    "(difference %ld.%09lds)n",
+	    file, line,
+	    left.tv_sec, left.tv_nsec,
+	    right.tv_sec, right.tv_nsec,
+	    diff.tv_sec, diff.tv_nsec);
+  }
+}
+
+void
+test_timespec_equal_or_after_impl (const char *file, int line,
+				   const struct timespec left,
+				   const struct timespec right)
+{
+  if (left.tv_sec < right.tv_sec
+      || (left.tv_sec == right.tv_sec
+	  && left.tv_nsec < right.tv_nsec)) {
+    support_record_failure ();
+    const struct timespec diff = timespec_sub (right, left);
+    printf ("%s:%d: %ld.%09lds not after %ld.%09lds "
+	    "(difference %ld.%09lds)n",
+	    file, line,
+	    left.tv_sec, left.tv_nsec,
+	    right.tv_sec, right.tv_nsec,
+	    diff.tv_sec, diff.tv_nsec);
+  }
+}