1 files changed, 113 insertions, 0 deletions
diff --git a/gnulib-tests/bench-digest.h b/gnulib-tests/bench-digest.h
new file mode 100644
index 0000000..f5852dc
--- /dev/null
+++ b/gnulib-tests/bench-digest.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2018-2022 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+
+struct timings_state
+{
+  /* Filled when the timings start.  */
+  struct timeval real_start;
+  struct timeval user_start;
+  struct timeval sys_start;
+  /* Filled when the timings end.  */
+  long real_usec;
+  long user_usec;
+  long sys_usec;
+};
+
+static void
+timing_start (struct timings_state *ts)
+{
+  struct rusage usage;
+
+  getrusage (RUSAGE_SELF, &usage);
+  ts->user_start = usage.ru_utime;
+  ts->sys_start = usage.ru_stime;
+
+  gettimeofday (&ts->real_start, NULL);
+}
+
+static void
+timing_end (struct timings_state *ts)
+{
+  struct timeval real_end;
+  struct rusage usage;
+
+  gettimeofday (&real_end, NULL);
+
+  getrusage (RUSAGE_SELF, &usage);
+
+  ts->real_usec = (real_end.tv_sec - ts->real_start.tv_sec) * 1000000
+                  + real_end.tv_usec - ts->real_start.tv_usec;
+  ts->user_usec = (usage.ru_utime.tv_sec - ts->user_start.tv_sec) * 1000000
+                  + usage.ru_utime.tv_usec - ts->user_start.tv_usec;
+  ts->sys_usec = (usage.ru_stime.tv_sec - ts->sys_start.tv_sec) * 1000000
+                 + usage.ru_stime.tv_usec - ts->sys_start.tv_usec;
+}
+
+static void
+timing_output (const struct timings_state *ts)
+{
+  printf ("real %10.6f\n", (double)ts->real_usec / 1000000.0);
+  printf ("user %7.3f\n", (double)ts->user_usec / 1000000.0);
+  printf ("sys  %7.3f\n", (double)ts->sys_usec / 1000000.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (argc != 3)
+    {
+      fprintf (stderr, "Usage: %s SIZE REPETITIONS\n", argv[0]);
+      exit (1);
+    }
+
+  size_t size = atol (argv[1]);
+  int repeat = atoi (argv[2]);
+
+  char *memblock = (char *) malloc (size);
+  if (!memblock)
+    {
+      fprintf (stderr, "%s: memory exhausted\n", argv[0]);
+      return 1;
+    }
+
+  /* Fill the memory block.  */
+  {
+    size_t i;
+    for (i = 0; i < size; i++)
+      memblock[i] =
+        (unsigned char) (((i * (i-1) * (i-5)) >> 6) + (i % 499) + (i % 101));
+  }
+
+  struct timings_state ts;
+  timing_start (&ts);
+
+  int count;
+  for (count = 0; count < repeat; count++)
+    {
+      char digest[64];
+      FUNC (memblock, size, digest);
+    }
+
+  timing_end (&ts);
+  timing_output (&ts);
+
+  return 0;
+}