2 files changed, 68 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/tests/test-ffsl.c b/gnulib/tests/test-ffsl.c
new file mode 100644
index 0000000..9c134c7
--- /dev/null
+++ b/gnulib/tests/test-ffsl.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2011 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 <http://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake.  */
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ffsl, int, (long int));
+
+#include <limits.h>
+
+#include "macros.h"
+
+#define NBITS (sizeof (long int) * CHAR_BIT)
+
+static int
+naive (long int i)
+{
+  unsigned long int j;
+  for (j = 0; j < NBITS; j++)
+    if (i & (1UL << j))
+      return j + 1;
+  return 0;
+}
+
+int
+main (int argc, char *argv[])
+{
+  long int x;
+  int i;
+
+  for (i = -128; i <= 128; i++)
+    ASSERT (ffsl (i) == naive (i));
+  for (i = 0; i < NBITS; i++)
+    {
+      ASSERT (ffsl (1UL << i) == naive (1UL << i));
+      ASSERT (ffsl (1UL << i) == i + 1);
+      ASSERT (ffsl (-1UL << i) == i + 1);
+    }
+  for (i = 0; i < NBITS - 1; i++)
+    {
+      ASSERT (ffsl (3UL << i) == i + 1);
+      ASSERT (ffsl (-3UL << i) == i + 1);
+    }
+  for (i = 0; i < NBITS - 2; i++)
+    {
+      ASSERT (ffsl (5UL << i) == i + 1);
+      ASSERT (ffsl (-5UL << i) == i + 1);
+      ASSERT (ffsl (7UL << i) == i + 1);
+      ASSERT (ffsl (-7UL << i) == i + 1);
+    }
+  return 0;
+}