ALL: Add flint

external/flint-2.4.3/nmod_vec/test/t-add_sub_neg.c

@@ -0,0 +1,112 @@
+/*=============================================================================
+
+    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) 2009 William Hart
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i, result;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("add/sub/neg....");
+    fflush(stdout);
+
+    /* Check (a + b) - b == a */
+    for (i = 0; i < 10000; i++)
+    {
+        slong len = n_randint(state, 100) + 1;
+        nmod_t mod;
+        mp_limb_t n = n_randtest_not_zero(state);
+
+        mp_ptr vec = _nmod_vec_init(len);
+        mp_ptr vec2 = _nmod_vec_init(len);
+        mp_ptr vec3 = _nmod_vec_init(len);
+
+        nmod_init(&mod, n);
+
+        _nmod_vec_randtest(vec, state, len, mod);
+        _nmod_vec_randtest(vec2, state, len, mod);
+
+        _nmod_vec_add(vec3, vec, vec2, len, mod);
+        _nmod_vec_sub(vec3, vec3, vec2, len, mod);
+
+        result = _nmod_vec_equal(vec, vec3, len);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("len = %wd, n = %wd\n", len, n);
+            abort();
+        }
+
+        _nmod_vec_clear(vec);
+        _nmod_vec_clear(vec2);
+        _nmod_vec_clear(vec3);
+    }
+
+    /* Check (a + -b) == a - b */
+    for (i = 0; i < 10000; i++)
+    {
+        slong len = n_randint(state, 100) + 1;
+        mp_limb_t n = n_randtest_not_zero(state);
+        nmod_t mod;
+
+        mp_ptr vec = _nmod_vec_init(len);
+        mp_ptr vec2 = _nmod_vec_init(len);
+        mp_ptr vec3 = _nmod_vec_init(len);
+
+        nmod_init(&mod, n);
+
+        _nmod_vec_randtest(vec, state, len, mod);
+        _nmod_vec_randtest(vec2, state, len, mod);
+
+        _nmod_vec_sub(vec3, vec, vec2, len, mod);
+        _nmod_vec_neg(vec2, vec2, len, mod);
+        _nmod_vec_add(vec, vec, vec2, len, mod);
+
+        result = _nmod_vec_equal(vec, vec3, len);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("len = %wd, n = %wd\n", len, n);
+            abort();
+        }
+
+        _nmod_vec_clear(vec);
+        _nmod_vec_clear(vec2);
+        _nmod_vec_clear(vec3);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-dot.c

@@ -0,0 +1,99 @@
+/*=============================================================================
+
+    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) 2011 Fredrik Johansson
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("dot....");
+    fflush(stdout);
+
+    for (i = 0; i < 10000; i++)
+    {
+        slong len;
+        nmod_t mod;
+        mp_limb_t m, res;
+        mp_ptr x, y;
+        int limbs1;
+        mpz_t s, t;
+        slong j;
+
+        len = n_randint(state, 1000) + 1;
+        m = n_randtest_not_zero(state);
+
+        nmod_init(&mod, m);
+
+        x = _nmod_vec_init(len);
+        y = _nmod_vec_init(len);
+
+        _nmod_vec_randtest(x, state, len, mod);
+        _nmod_vec_randtest(y, state, len, mod);
+
+        limbs1 = _nmod_vec_dot_bound_limbs(len, mod);
+
+        res = _nmod_vec_dot(x, y, len, mod, limbs1);
+
+        mpz_init(s);
+        mpz_init(t);
+
+        for (j = 0; j < len; j++)
+        {
+            flint_mpz_set_ui(t, x[j]);
+            flint_mpz_addmul_ui(s, t, y[j]);
+        }
+
+        flint_mpz_mod_ui(s, s, m);
+
+        if (flint_mpz_get_ui(s) != res)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("m = %wu\n", m);
+            flint_printf("len = %wd\n", len);
+            flint_printf("limbs1 = %d\n", limbs1);
+            abort();
+        }
+
+        mpz_clear(s);
+        mpz_clear(t);
+
+        _nmod_vec_clear(x);
+        _nmod_vec_clear(y);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-dot_bound_limbs.c

@@ -0,0 +1,82 @@
+/*=============================================================================
+
+    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) 2011 Fredrik Johansson
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("dot_bound_limbs....");
+    fflush(stdout);
+
+    for (i = 0; i < 1000000; i++)
+    {
+        slong len;
+        nmod_t mod;
+        mp_limb_t m;
+        int limbs1, limbs2;
+        mpz_t t;
+
+        len = n_randint(state, 10000) + 1;
+        m = n_randtest_not_zero(state);
+
+        nmod_init(&mod, m);
+
+        limbs1 = _nmod_vec_dot_bound_limbs(len, mod);
+
+        mpz_init2(t, 4*FLINT_BITS);
+        flint_mpz_set_ui(t, m-1);
+        mpz_mul(t, t, t);
+        flint_mpz_mul_ui(t, t, len);
+        limbs2 = mpz_size(t);
+
+        if (limbs1 != limbs2)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("m = %wu\n", m);
+            flint_printf("len = %wd\n", len);
+            flint_printf("limbs1 = %d\n", limbs1);
+            flint_printf("limbs2 = %d\n", limbs2);
+            gmp_printf("bound: %Zd\n", t);
+            abort();
+        }
+
+        mpz_clear(t);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-dot_ptr.c

@@ -0,0 +1,92 @@
+/*=============================================================================
+
+    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) 2011 Fredrik Johansson
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("dot_ptr....");
+    fflush(stdout);
+
+    for (i = 0; i < 10000; i++)
+    {
+        slong len;
+        nmod_t mod;
+        mp_limb_t m, res, res2;
+        mp_ptr x, y;
+        mp_ptr * z;
+        int limbs1;
+        slong j, offset;
+
+        len = n_randint(state, 1000) + 1;
+        m = n_randtest_not_zero(state);
+        offset = n_randint(state, 10);
+
+        nmod_init(&mod, m);
+
+        x = _nmod_vec_init(len);
+        y = _nmod_vec_init(len);
+        z = flint_malloc(sizeof(mp_ptr) * len);
+
+        _nmod_vec_randtest(x, state, len, mod);
+        _nmod_vec_randtest(y, state, len, mod);
+
+        for (j = 0; j < len; j++)
+            z[j] = &y[j] + offset;
+
+        limbs1 = _nmod_vec_dot_bound_limbs(len, mod);
+
+        res = _nmod_vec_dot_ptr(x, z, -offset, len, mod, limbs1);
+        res2 = _nmod_vec_dot(x, y, len, mod, limbs1);
+
+        if (res != res2)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("m = %wu\n", m);
+            flint_printf("len = %wd\n", len);
+            flint_printf("limbs1 = %d\n", limbs1);
+            abort();
+        }
+
+        _nmod_vec_clear(x);
+        _nmod_vec_clear(y);
+        flint_free(z);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-nmod.c

@@ -0,0 +1,263 @@
+/*=============================================================================
+
+    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) 2013 Fredrik Johansson
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("nmod....");
+    fflush(stdout);
+
+    /* nmod_add */
+    for (i = 0; i < 10000; i++)
+    {
+        nmod_t mod;
+        mp_limb_t m, a, b, c;
+        mpz_t x, y, z;
+
+        m = n_randtest_not_zero(state);
+
+        nmod_init(&mod, m);
+        a = n_randlimb(state) % m;
+        b = n_randlimb(state) % m;
+
+        c = nmod_add(a, b, mod);
+
+        mpz_init(x);
+        mpz_init(y);
+        mpz_init(z);
+
+        flint_mpz_set_ui(x, a);
+        flint_mpz_set_ui(y, b);
+        mpz_add(z, x, y);
+        flint_mpz_mod_ui(z, z, m);
+
+        if (flint_mpz_cmp_ui(z, c) != 0)
+        {
+            flint_printf("FAIL (add):\n");
+            flint_printf("m = %wu\n", m);
+            abort();
+        }
+
+        mpz_clear(x);
+        mpz_clear(y);
+        mpz_clear(z);
+    }
+
+    /* nmod_sub */
+    for (i = 0; i < 10000; i++)
+    {
+        nmod_t mod;
+        mp_limb_t m, a, b, c;
+        mpz_t x, y, z;
+
+        m = n_randtest_not_zero(state);
+
+        nmod_init(&mod, m);
+        a = n_randlimb(state) % m;
+        b = n_randlimb(state) % m;
+
+        c = nmod_sub(a, b, mod);
+
+        mpz_init(x);
+        mpz_init(y);
+        mpz_init(z);
+
+        flint_mpz_set_ui(x, a);
+        flint_mpz_set_ui(y, b);
+        mpz_sub(z, x, y);
+        flint_mpz_mod_ui(z, z, m);
+
+        if (flint_mpz_cmp_ui(z, c) != 0)
+        {
+            flint_printf("FAIL (sub):\n");
+            flint_printf("m = %wu\n", m);
+            abort();
+        }
+
+        mpz_clear(x);
+        mpz_clear(y);
+        mpz_clear(z);
+    }
+
+    /* nmod_mul */
+    for (i = 0; i < 10000; i++)
+    {
+        nmod_t mod;
+        mp_limb_t m, a, b, c;
+        mpz_t x, y, z;
+
+        m = n_randtest_not_zero(state);
+
+        nmod_init(&mod, m);
+        a = n_randlimb(state) % m;
+        b = n_randlimb(state) % m;
+
+        c = nmod_mul(a, b, mod);
+
+        mpz_init(x);
+        mpz_init(y);
+        mpz_init(z);
+
+        flint_mpz_set_ui(x, a);
+        flint_mpz_set_ui(y, b);
+        mpz_mul(z, x, y);
+        flint_mpz_mod_ui(z, z, m);
+
+        if (flint_mpz_cmp_ui(z, c) != 0)
+        {
+            flint_printf("FAIL (mul):\n");
+            flint_printf("m = %wu\n", m);
+            abort();
+        }
+
+        mpz_clear(x);
+        mpz_clear(y);
+        mpz_clear(z);
+    }
+
+    /* nmod_div */
+    for (i = 0; i < 10000; i++)
+    {
+        nmod_t mod;
+        mp_limb_t m, a, b, c;
+        mpz_t x, y, z;
+
+        m = n_randtest_prime(state, 0);
+
+        nmod_init(&mod, m);
+
+        a = n_randlimb(state) % m;
+        do { b = n_randlimb(state) % m; } while (b == 0);
+
+        c = nmod_div(a, b, mod);
+
+        mpz_init(x);
+        mpz_init(y);
+        mpz_init(z);
+
+        flint_mpz_set_ui(x, a);
+        flint_mpz_set_ui(y, b);
+        flint_mpz_set_ui(z, m);
+        mpz_invert(z, y, z);
+        mpz_mul(z, x, z);
+        flint_mpz_mod_ui(z, z, m);
+
+        if (flint_mpz_cmp_ui(z, c) != 0)
+        {
+            flint_printf("FAIL (div):\n");
+            flint_printf("m = %wu\n", m);
+            abort();
+        }
+
+        mpz_clear(x);
+        mpz_clear(y);
+        mpz_clear(z);
+    }
+
+    /* nmod_inv */
+    for (i = 0; i < 10000; i++)
+    {
+        nmod_t mod;
+        mp_limb_t m, b, c;
+        mpz_t y, z;
+
+        m = n_randtest_prime(state, 0);
+
+        nmod_init(&mod, m);
+
+        do { b = n_randlimb(state) % m; } while (b == 0);
+
+        c = nmod_inv(b, mod);
+
+        mpz_init(y);
+        mpz_init(z);
+
+        flint_mpz_set_ui(y, b);
+        flint_mpz_set_ui(z, m);
+        mpz_invert(z, y, z);
+
+        if (flint_mpz_cmp_ui(z, c) != 0)
+        {
+            flint_printf("FAIL (div):\n");
+            flint_printf("m = %wu\n", m);
+            abort();
+        }
+
+        mpz_clear(y);
+        mpz_clear(z);
+    }
+
+    /* nmod_pow_ui */
+    for (i = 0; i < 10000; i++)
+    {
+        nmod_t mod;
+        mp_limb_t m, b, c;
+        mpz_t y, z;
+        ulong exp;
+
+        m = n_randtest_prime(state, 0);
+        exp = n_randtest(state);
+
+        nmod_init(&mod, m);
+
+        b = n_randlimb(state) % m;
+
+        c = nmod_pow_ui(b, exp, mod);
+
+        mpz_init(y);
+        mpz_init(z);
+
+        flint_mpz_set_ui(y, b);
+        flint_mpz_set_ui(z, m);
+        flint_mpz_powm_ui(z, y, exp, z);
+
+        if (flint_mpz_cmp_ui(z, c) != 0)
+        {
+            flint_printf("FAIL (pow):\n");
+            flint_printf("m = %wu\n", m);
+            abort();
+        }
+
+        mpz_clear(y);
+        mpz_clear(z);
+    }
+
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-reduce.c

@@ -0,0 +1,79 @@
+/*=============================================================================
+
+    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) 2009 William Hart
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i, result;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("reduce....");
+    fflush(stdout);
+
+    for (i = 0; i < 10000; i++)
+    {
+        slong j, len = n_randint(state, 100) + 1;
+        mp_ptr vec = _nmod_vec_init(len);
+        mp_ptr vec2 = _nmod_vec_init(len);
+
+        mp_limb_t n = n_randtest_not_zero(state);
+        nmod_t mod;
+        nmod_init(&mod, n);
+
+        for (j = 0; j < len; j++)
+        {
+            vec[j] = n_randtest(state);
+            vec2[j] = vec[j];
+        }
+
+        _nmod_vec_reduce(vec, vec, len, mod);
+        for (j = 0; j < len; j++)
+            vec2[j] = n_mod2_preinv(vec2[j], mod.n, mod.ninv);
+
+        result = _nmod_vec_equal(vec, vec2, len);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("len = %wd, n = %wd\n", len, n);
+            abort();
+        }
+
+        _nmod_vec_clear(vec);
+        _nmod_vec_clear(vec2);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-scalar_addmul_nmod.c

@@ -0,0 +1,83 @@
+/*=============================================================================
+
+    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) 2009 William Hart
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i, result;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("scalar_addmul_nmod....");
+    fflush(stdout);
+
+    /* Check (a + b*c) == a + (b*c) */
+    for (i = 0; i < 10000; i++)
+    {
+        slong len = n_randint(state, 100) + 1;
+        mp_limb_t n = n_randtest_not_zero(state);
+        mp_limb_t c = n_randint(state, n);
+        nmod_t mod;
+
+        mp_ptr vec = _nmod_vec_init(len);
+        mp_ptr vec2 = _nmod_vec_init(len);
+        mp_ptr vec3 = _nmod_vec_init(len);
+
+        nmod_init(&mod, n);
+
+        _nmod_vec_randtest(vec, state, len, mod);
+        _nmod_vec_randtest(vec2, state, len, mod);
+        flint_mpn_copyi(vec3, vec2, len);
+
+        _nmod_vec_scalar_mul_nmod(vec3, vec, len, c, mod);
+        _nmod_vec_add(vec3, vec3, vec2, len, mod);
+
+        _nmod_vec_scalar_addmul_nmod(vec2, vec, len, c, mod);
+
+        result = _nmod_vec_equal(vec2, vec3, len);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("len = %wd, n = %wd\n", len, n);
+            abort();
+        }
+
+        _nmod_vec_clear(vec);
+        _nmod_vec_clear(vec2);
+        _nmod_vec_clear(vec3);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}

external/flint-2.4.3/nmod_vec/test/t-scalar_mul_nmod.c

@@ -0,0 +1,84 @@
+/*=============================================================================
+
+    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) 2009 William Hart
+
+******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+#include "ulong_extras.h"
+
+int
+main(void)
+{
+    int i, result;
+    FLINT_TEST_INIT(state);
+    
+
+    flint_printf("scalar_mul_nmod....");
+    fflush(stdout);
+
+    /* Check (a + b)*c == a*c + b*c */
+    for (i = 0; i < 10000; i++)
+    {
+        slong len = n_randint(state, 100) + 1;
+        mp_limb_t n = n_randtest_not_zero(state);
+        mp_limb_t c = n_randint(state, n);
+        nmod_t mod;
+
+        mp_ptr vec = _nmod_vec_init(len);
+        mp_ptr vec2 = _nmod_vec_init(len);
+        mp_ptr vec3 = _nmod_vec_init(len);
+
+        nmod_init(&mod, n);
+
+        _nmod_vec_randtest(vec, state, len, mod);
+        _nmod_vec_randtest(vec2, state, len, mod);
+
+        _nmod_vec_add(vec3, vec, vec2, len, mod);
+        _nmod_vec_scalar_mul_nmod(vec3, vec3, len, c, mod);
+
+        _nmod_vec_scalar_mul_nmod(vec, vec, len, c, mod);
+        _nmod_vec_scalar_mul_nmod(vec2, vec2, len, c, mod);
+        _nmod_vec_add(vec, vec, vec2, len, mod);
+
+        result = _nmod_vec_equal(vec, vec3, len);
+        if (!result)
+        {
+            flint_printf("FAIL:\n");
+            flint_printf("len = %wd, n = %wd\n", len, n);
+            abort();
+        }
+
+        _nmod_vec_clear(vec);
+        _nmod_vec_clear(vec2);
+        _nmod_vec_clear(vec3);
+    }
+
+    FLINT_TEST_CLEANUP(state);
+    
+    flint_printf("PASS\n");
+    return 0;
+}