Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/tests/mpz/t-invert.c

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+/* Test mpz_invert.
+
+Copyright 1991, 1993, 1994, 1996, 1997, 2000-2005, 2008, 2009, 2012, 2014 Free
+Software Foundation, Inc.
+
+This file is part of the GNU MP Library test suite.
+
+The GNU MP Library test suite 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 3 of the License,
+or (at your option) any later version.
+
+The GNU MP Library test suite 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 test suite.  If not, see https://www.gnu.org/licenses/.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "gmp-impl.h"
+#include "tests.h"
+
+int
+main (int argc, char **argv)
+{
+  mpz_t a, m, ainv, t;
+  int test, r;
+  gmp_randstate_ptr rands;
+  mpz_t bs;
+  unsigned long bsi, size_range;
+  int reps = 1000;
+
+  tests_start ();
+  TESTS_REPS (reps, argv, argc);
+
+  rands = RANDS;
+
+  mpz_init (bs);
+  mpz_init (a);
+  mpz_init (m);
+  mpz_init (ainv);
+  mpz_init (t);
+
+  for (test = 0; test < reps; test++)
+    {
+      mpz_urandomb (bs, rands, 32);
+      size_range = mpz_get_ui (bs) % 16 + 2;
+
+      mpz_urandomb (bs, rands, size_range);
+      mpz_rrandomb (a, rands, mpz_get_ui (bs));
+      do {
+	mpz_urandomb (bs, rands, size_range);
+	mpz_rrandomb (m, rands, mpz_get_ui (bs));
+      } while (mpz_sgn (m) == 0);
+
+      mpz_urandomb (bs, rands, 8);
+      bsi = mpz_get_ui (bs);
+
+      if ((bsi & 1) != 0)
+	mpz_neg (a, a);
+      if ((bsi & 2) != 0)
+	mpz_neg (m, m);
+
+      r = mpz_invert (ainv, a, m);
+      if (r != 0)
+	{
+	  MPZ_CHECK_FORMAT (ainv);
+
+	  if (mpz_cmp_ui (ainv, 0) < 0 || mpz_cmpabs (ainv, m) >= 0)
+	    {
+	      fprintf (stderr, "ERROR in test %d\n", test);
+	      gmp_fprintf (stderr, "Inverse out of range.\n");
+	      gmp_fprintf (stderr, "a = %Zx\n", a);
+	      gmp_fprintf (stderr, "1/a = %Zx\n", ainv);
+	      gmp_fprintf (stderr, "m = %Zx\n", m);
+	      abort ();
+	    }
+
+	  mpz_mul (t, ainv, a);
+	  mpz_mod (t, t, m);
+
+	  if (mpz_cmp_ui (t, mpz_cmpabs_ui (m, 1) != 0) != 0)
+	    {
+	      fprintf (stderr, "ERROR in test %d\n", test);
+	      gmp_fprintf (stderr, "a^(-1)*a != 1 (mod m)\n");
+	      gmp_fprintf (stderr, "a = %Zx\n", a);
+	      gmp_fprintf (stderr, "m = %Zx\n", m);
+	      abort ();
+	    }
+	}
+      else /* Inverse deos not exist */
+	{
+	  mpz_gcd (t, a, m);
+	  if (mpz_cmp_ui (t, 1) == 0)
+	    {
+	      fprintf (stderr, "ERROR in test %d\n", test);
+	      gmp_fprintf (stderr, "Inverse exists, but was not found.\n");
+	      gmp_fprintf (stderr, "a = %Zx\n", a);
+	      gmp_fprintf (stderr, "m = %Zx\n", m);
+	      abort ();
+	    }
+	}
+    }
+
+  mpz_clear (bs);
+  mpz_clear (a);
+  mpz_clear (m);
+  mpz_clear (ainv);
+  mpz_clear (t);
+
+  tests_end ();
+  exit (0);
+}