GNU MP (Multiprecision) library. This is needed by secure RPC (being

done by Bill Paul) and various other BSD programs.
Obtained from:FSF

1 files changed, 131 insertions, 0 deletions

diff --git a/gnu/lib/libgmp/tests/tst-gcd.c b/gnu/lib/libgmp/tests/tst-gcd.c
new file mode 100644
index 0000000..166aa56
--- /dev/null
+++ b/gnu/lib/libgmp/tests/tst-gcd.c
@@ -0,0 +1,131 @@
+/* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_mod, mpz_add, mpz_cmp,
+   mpz_cmp_ui. mpz_init_set, mpz_set, mpz_clear.
+
+Copyright (C) 1991, 1993 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 General Public License as published by
+the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU MP Library; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <stdio.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "urandom.h"
+
+void mpz_refgcd (), debug_mp ();
+
+#ifndef SIZE
+#define SIZE 8
+#endif
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  MP_INT op1, op2;
+  MP_INT refgcd, gcd, s, t;
+  MP_INT temp1, temp2;
+  mp_size op1_size, op2_size;
+  int i;
+  int reps = 10000;
+
+  if (argc == 2)
+     reps = atoi (argv[1]);
+
+  mpz_init (&op1);
+  mpz_init (&op2);
+  mpz_init (&refgcd);
+  mpz_init (&gcd);
+  mpz_init (&temp1);
+  mpz_init (&temp2);
+  mpz_init (&s);
+  mpz_init (&t);
+
+  for (i = 0; i < reps; i++)
+    {
+      op1_size = urandom () % SIZE;
+      op2_size = urandom () % SIZE;
+
+      mpz_random2 (&op1, op1_size);
+      mpz_random2 (&op2, op2_size);
+
+      mpz_refgcd (&refgcd, &op1, &op2);
+
+      mpz_gcd (&gcd, &op1, &op2);
+      if (mpz_cmp (&refgcd, &gcd))
+	dump_abort (&op1, &op2);
+
+      mpz_gcdext (&gcd, &s, &t, &op1, &op2);
+      if (mpz_cmp (&refgcd, &gcd))
+	dump_abort (&op1, &op2);
+
+      mpz_mul (&temp1, &s, &op1);
+      mpz_mul (&temp2, &t, &op2);
+      mpz_add (&gcd, &temp1, &temp2);
+      if (mpz_cmp (&refgcd, &gcd))
+	dump_abort (&op1, &op2);
+    }
+
+  exit (0);
+}
+
+void
+mpz_refgcd (g, x, y)
+     MP_INT *g;
+     MP_INT *x, *y;
+{
+  MP_INT xx, yy;
+
+  mpz_init (&xx);
+  mpz_init (&yy);
+
+  mpz_abs (&xx, x);
+  mpz_abs (&yy, y);
+
+  for (;;)
+    {
+      if (mpz_cmp_ui (&yy, 0) == 0)
+	{
+	  mpz_set (g, &xx);
+	  break;
+	}
+      mpz_mod (&xx, &xx, &yy);
+      if (mpz_cmp_ui (&xx, 0) == 0)
+	{
+	  mpz_set (g, &yy);
+	  break;
+	}
+      mpz_mod (&yy, &yy, &xx);
+    }
+
+  mpz_clear (&xx);
+  mpz_clear (&yy);
+}
+
+dump_abort (op1, op2)
+     MP_INT *op1, *op2;
+{
+  fprintf (stderr, "ERROR\n");
+  fprintf (stderr, "op1 = "); debug_mp (op1, -16);
+  fprintf (stderr, "op2 = "); debug_mp (op2, -16);
+  abort();
+}
+
+void
+debug_mp (x, base)
+     MP_INT *x;
+{
+  mpz_out_str (stderr, base, x); fputc ('\n', stderr);
+}