1 files changed, 88 insertions, 0 deletions
diff --git a/contrib/libgmp/mpq/tests/t-get_d.c b/contrib/libgmp/mpq/tests/t-get_d.c
new file mode 100644
index 0000000..db4f926
--- /dev/null
+++ b/contrib/libgmp/mpq/tests/t-get_d.c
@@ -0,0 +1,88 @@
+/* Test mpq_get_d
+
+Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Library General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include <stdio.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "urandom.h"
+
+#ifndef SIZE
+#define SIZE 8
+#endif
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  mpq_t a;
+  mp_size_t size;
+  int reps = 10000;
+  int i, j;
+  double last_d, new_d;
+  mpz_t eps;
+
+  if (argc == 2)
+     reps = atoi (argv[1]);
+
+  /* The idea here is to test the monotonousness of mpq_get_d by adding
+     numbers to the numerator and denominator.  */
+
+  mpq_init (a);
+  mpz_init (eps);
+
+  for (i = 0; i < reps; i++)
+    {
+      size = urandom () % SIZE - SIZE/2;
+      mpz_random2 (mpq_numref (a), size);
+      do
+	{
+	  size = urandom () % SIZE - SIZE/2;
+	  mpz_random2 (mpq_denref (a), size);
+	}
+      while (mpz_cmp_ui (mpq_denref (a), 0) == 0);
+
+      mpq_canonicalize (a);
+
+      last_d = mpq_get_d (a);
+      for (j = 0; j < 10; j++)
+	{
+	  size = urandom () % SIZE;
+	  mpz_random2 (eps, size);
+	  mpz_add (mpq_numref (a), mpq_numref (a), eps);
+	  mpq_canonicalize (a);
+	  new_d = mpq_get_d (a);
+	  if (last_d > new_d)
+	    abort ();
+	  last_d = new_d;
+	}
+    }
+
+  exit (0);
+}
+
+dump (x)
+     mpq_t x;
+{
+  mpz_out_str (stdout, 10, mpq_numref (x));
+  printf ("/");
+  mpz_out_str (stdout, 10, mpq_denref (x));
+  printf ("\n");
+}