ALL: Add flint

2014-05-19 00:03:37 +02:00
parent a15ef46ea6
commit d51d8e3652
3752 changed files with 446416 additions and 0 deletions
--- a/external/flint-2.4.3/nmod_poly/compose.c
+++ b/external/flint-2.4.3/nmod_poly/compose.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) 2010 William Hart
+    Copyright (C) 2010, 2012 Sebastian Pancratz
+
+******************************************************************************/
+
+#include "nmod_poly.h"
+
+void
+_nmod_poly_compose(mp_ptr res, mp_srcptr poly1, slong len1, 
+                               mp_srcptr poly2, slong len2, nmod_t mod)
+{
+    if (len1 == 1)
+        res[0] = poly1[0];
+    else if (len2 == 1)
+        res[0] = _nmod_poly_evaluate_nmod(poly1, len1, poly2[0], mod);
+    else if (len1 <= 7)
+        _nmod_poly_compose_horner(res, poly1, len1, poly2, len2, mod);
+    else
+        _nmod_poly_compose_divconquer(res, poly1, len1, poly2, len2, mod);
+}
+
+void nmod_poly_compose(nmod_poly_t res, 
+                       const nmod_poly_t poly1, const nmod_poly_t poly2)
+{
+    const slong len1 = poly1->length;
+    const slong len2 = poly2->length;
+    
+    if (len1 == 0)
+    {
+        nmod_poly_zero(res);
+    }
+    else if (len1 == 1 || len2 == 0)
+    {
+        nmod_poly_fit_length(res, 1);
+        res->coeffs[0] = poly1->coeffs[0];
+        res->length = (res->coeffs[0] != 0);
+    }
+    else
+    {
+        const slong lenr = (len1 - 1) * (len2 - 1) + 1;
+        
+        if (res != poly1 && res != poly2)
+        {
+            nmod_poly_fit_length(res, lenr);
+            _nmod_poly_compose_horner(res->coeffs, poly1->coeffs, len1, 
+                                                   poly2->coeffs, len2, poly1->mod);
+        }
+        else
+        {
+            nmod_poly_t t;
+            nmod_poly_init2(t, poly1->mod.n, lenr);
+            _nmod_poly_compose_horner(t->coeffs, poly1->coeffs, len1,
+                                                 poly2->coeffs, len2, poly1->mod);
+            nmod_poly_swap(res, t);
+            nmod_poly_clear(t);
+        }
+
+        res->length = lenr;
+        _nmod_poly_normalise(res);
+    }
+}