1 files changed, 109 insertions, 0 deletions
diff --git a/mpq/tests/t-cmp.c b/mpq/tests/t-cmp.c
new file mode 100644
index 000000000..77e46f208
--- /dev/null
+++ b/mpq/tests/t-cmp.c
@@ -0,0 +1,109 @@
+/* Test mpq_cmp.
+
+Copyright (C) 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"
+
+#define NUM(x) (&((x)->_mp_num))
+#define DEN(x) (&((x)->_mp_den))
+
+#define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
+
+ref_mpq_cmp (a, b)
+     mpq_t a, b;
+{
+  mpz_t ai, bi;
+  int cc;
+
+  mpz_init (ai);
+  mpz_init (bi);
+
+  mpz_mul (ai, NUM (a), DEN (b));
+  mpz_mul (bi, NUM (b), DEN (a));
+  cc = mpz_cmp (ai, bi);
+  mpz_clear (ai);
+  mpz_clear (bi);
+  return cc;
+}
+
+#ifndef SIZE
+#define SIZE 8	/* increasing this lowers the probabilty of finding an error */
+#endif
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  mpq_t a, b;
+  mp_size_t size;
+  int reps = 100000;
+  int i;
+  int cc, ccref;
+
+  if (argc == 2)
+     reps = atoi (argv[1]);
+
+  mpq_init (a);
+  mpq_init (b);
+
+  for (i = 0; i < reps; i++)
+    {
+      size = urandom () % SIZE - SIZE/2;
+      mpz_random2 (NUM (a), size);
+      do
+	{
+	  size = urandom () % SIZE - SIZE/2;
+	  mpz_random2 (DEN (a), size);
+	}
+      while (mpz_cmp_ui (DEN (a), 0) == 0);
+
+      size = urandom () % SIZE - SIZE/2;
+      mpz_random2 (NUM (b), size);
+      do
+	{
+	  size = urandom () % SIZE - SIZE/2;
+	  mpz_random2 (DEN (b), size);
+	}
+      while (mpz_cmp_ui (DEN (b), 0) == 0);
+
+      mpq_canonicalize (a);
+      mpq_canonicalize (b);
+
+      ccref = ref_mpq_cmp (a, b);
+      cc = mpq_cmp (a, b);
+
+      if (SGN (ccref) != SGN (cc))
+	abort ();
+    }
+
+  exit (0);
+}
+
+dump (x)
+     mpq_t x;
+{
+  mpz_out_str (stdout, 10, NUM (x));
+  printf ("/");
+  mpz_out_str (stdout, 10, DEN (x));
+  printf ("\n");
+}