ALL: Add flint

external/flint-2.4.3/fmpz_mod_poly/add.c

@@ -0,0 +1,60 @@
+/*=============================================================================
+
+    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 Sebastian Pancratz
+    Copyright (C) 2008, 2009 William Hart
+
+******************************************************************************/
+
+#include <gmp.h>
+#include "flint.h"
+#include "fmpz.h"
+#include "fmpz_poly.h"
+#include "fmpz_mod_poly.h"
+
+void _fmpz_mod_poly_add(fmpz *res, const fmpz *poly1, slong len1, 
+                                   const fmpz *poly2, slong len2, const fmpz_t p)
+{
+    slong i, len = FLINT_MAX(len1, len2);
+
+    _fmpz_poly_add(res, poly1, len1, poly2, len2);
+
+    for (i = 0; i < len; i++)
+    {
+        if (fmpz_cmpabs(res + i, p) >= 0)
+            fmpz_sub(res + i, res + i, p);
+    }
+}
+
+void fmpz_mod_poly_add(fmpz_mod_poly_t res, 
+                       const fmpz_mod_poly_t poly1, const fmpz_mod_poly_t poly2)
+{
+    slong max = FLINT_MAX(poly1->length, poly2->length);
+
+    fmpz_mod_poly_fit_length(res, max);
+
+    _fmpz_mod_poly_add(res->coeffs, poly1->coeffs, poly1->length, 
+                                    poly2->coeffs, poly2->length, &(res->p));
+
+    _fmpz_mod_poly_set_length(res, max);
+    _fmpz_mod_poly_normalise(res);
+}
+