tests: added tisqrt.c (test file for __gmpfr_isqrt internal function).

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@4856 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 69 insertions, 0 deletions

diff --git a/tests/tisqrt.c b/tests/tisqrt.c
new file mode 100644
index 000000000..c2ec31d86
--- /dev/null
+++ b/tests/tisqrt.c
@@ -0,0 +1,69 @@
+/* Test file for __gmpfr_isqrt internal function.
+
+Copyright 2007 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the MPFR Library.
+
+The MPFR 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 MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mpfr-test.h"
+
+static void
+tst_isqrt (unsigned long n, unsigned long r)
+{
+  unsigned long i;
+
+  i = __gmpfr_isqrt (n);
+  if (i != r)
+    {
+      printf ("Error in __gmpfr_isqrt (%lu): got %lu instead of %lu\n",
+              n, i, r);
+      exit (1);
+    }
+}
+
+int
+main (void)
+{
+  tst_isqrt (0, 0);
+  tst_isqrt (1, 1);
+  tst_isqrt (2, 1);
+  tst_isqrt (3, 1);
+  tst_isqrt (4, 2);
+  tst_isqrt (8, 2);
+  tst_isqrt (9, 3);
+  tst_isqrt (15, 3);
+  tst_isqrt (16, 4);
+  tst_isqrt (255, 15);
+  tst_isqrt (256, 16);
+  tst_isqrt (288, 16);
+  tst_isqrt (289, 17);
+  tst_isqrt (4095, 63);
+  tst_isqrt (4096, 64);
+  tst_isqrt (65535, 255);
+  tst_isqrt (65536, 256);
+  tst_isqrt (262143, 511);
+  tst_isqrt (262144, 512);
+  tst_isqrt (16777215, 4095);
+  tst_isqrt (16777216, 4096);
+  tst_isqrt (4294967295UL, 65535);
+
+  return 0;
+}