ALL: Add flint

external/flint-2.4.3/nmod_poly/test/t-compose_divconquer.c

@@ -0,0 +1,139 @@
+/*=============================================================================
+
+    This file is part of FLINT.
+
+    FLINT 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 of the License, or
+    (at your option) any later version.
+
+    FLINT 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 FLINT; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+=============================================================================*/
+/******************************************************************************
+
+    Copyright (C) 2010 William Hart
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_poly.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i, result = 1;
+    FLINT_TEST_INIT(state);
+    
+    
+    flint_printf("compose_divconquer....");
+    fflush(stdout);
+
+    /* Compare aliasing */
+    for (i = 0; i < 500 * flint_test_multiplier(); i++)
+    {
+        nmod_poly_t a, b, r1;
+        mp_limb_t n = n_randtest_not_zero(state);
+        
+        nmod_poly_init(a, n);
+        nmod_poly_init(b, n);
+        nmod_poly_init(r1, n);
+        nmod_poly_randtest(a, state, n_randint(state, 30));
+        nmod_poly_randtest(b, state, n_randint(state, 15));
+        
+        nmod_poly_compose_divconquer(r1, a, b);
+        nmod_poly_compose_divconquer(a, a, b);
+        
+        result = nmod_poly_equal(r1, a);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("a->length = %wd, n = %wu\n", a->length, a->mod.n);
+            nmod_poly_print(r1), flint_printf("\n\n");
+            nmod_poly_print(a), flint_printf("\n\n");
+            abort();
+        }
+
+        nmod_poly_clear(a);
+        nmod_poly_clear(b);
+        nmod_poly_clear(r1);
+    }
+    
+    /* Compare other aliasing */
+    for (i = 0; i < 500 * flint_test_multiplier(); i++)
+    {
+        nmod_poly_t a, b, r1;
+        mp_limb_t n = n_randtest_not_zero(state);
+        
+        nmod_poly_init(a, n);
+        nmod_poly_init(b, n);
+        nmod_poly_init(r1, n);
+        nmod_poly_randtest(a, state, n_randint(state, 30));
+        nmod_poly_randtest(b, state, n_randint(state, 15));
+        
+        nmod_poly_compose_divconquer(r1, a, b);
+        nmod_poly_compose_divconquer(b, a, b);
+        
+        result = nmod_poly_equal(r1, b);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("a->length = %wd, n = %wu\n", a->length, a->mod.n);
+            nmod_poly_print(r1), flint_printf("\n\n");
+            nmod_poly_print(b), flint_printf("\n\n");
+            abort();
+        }
+
+        nmod_poly_clear(a);
+        nmod_poly_clear(b);
+        nmod_poly_clear(r1);
+    }
+    
+    /* Compare with compose_horner */
+    for (i = 0; i < 500 * flint_test_multiplier(); i++)
+    {
+        nmod_poly_t a, b, r1, r2;
+        mp_limb_t n = n_randtest_not_zero(state);
+        
+        nmod_poly_init(a, n);
+        nmod_poly_init(b, n);
+        nmod_poly_init(r1, n);
+        nmod_poly_init(r2, n);
+        nmod_poly_randtest(a, state, n_randint(state, 30));
+        nmod_poly_randtest(b, state, n_randint(state, 15));
+        
+        nmod_poly_compose_divconquer(r1, a, b);
+        nmod_poly_compose_horner(r2, a, b);
+        
+        result = nmod_poly_equal(r1, r2);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("a->length = %wd, n = %wu\n", a->length, a->mod.n);
+            nmod_poly_print(r1), flint_printf("\n\n");
+            nmod_poly_print(r2), flint_printf("\n\n");
+            abort();
+        }
+
+        nmod_poly_clear(a);
+        nmod_poly_clear(b);
+        nmod_poly_clear(r1);
+        nmod_poly_clear(r2);
+    }
+    
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}