X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/240f4b16cb0cd57db5661561fecb4f932eb043bb..7affb40735592998dc047f216b48f9b771e4df1a:/libtests/t-bits.c

diff --git a/libtests/t-bits.c b/libtests/t-bits.c
new file mode 100644
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--- /dev/null
+++ b/libtests/t-bits.c
@@ -0,0 +1,47 @@
+/*
+ * This file is part of DisOrder.
+ * Copyright (C) 2008 Richard Kettlewell
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+#include "test.h"
+#include "bits.h"
+
+static void test_bits(void) {
+  int n;
+  
+  check_integer(leftmost_bit(0), -1);
+  check_integer(leftmost_bit(0x80000000), 31);
+  check_integer(leftmost_bit(0xffffffff), 31);
+  for(n = 0; n < 28; ++n) {
+    const uint32_t b = 1 << n, limit = 2 * b;
+    uint32_t v;
+
+    for(v = b; v < limit; ++v)
+      check_integer(leftmost_bit(v), n);
+  }
+}
+
+TEST(bits);
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+indent-tabs-mode:nil
+End:
+*/