ALL: Add flint

external/flint-2.4.3/nmod_poly/remove.c

@@ -0,0 +1,55 @@
+/*=============================================================================
+
+    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) 2007 David Howden
+    Copyright (C) 2007, 2008, 2009, 2010 William Hart
+    Copyright (C) 2008 Richard Howell-Peak
+    Copyright (C) 2011 Fredrik Johansson
+
+******************************************************************************/
+
+#include "nmod_poly.h"
+
+ulong nmod_poly_remove(nmod_poly_t f, const nmod_poly_t p)
+{
+    nmod_poly_t q, r;
+    ulong i = 0;
+
+    nmod_poly_init_preinv(q, p->mod.n, p->mod.ninv);
+    nmod_poly_init_preinv(r, p->mod.n, p->mod.ninv);
+
+    while (1)
+    {
+        if (f->length < p->length)
+            break;
+        nmod_poly_divrem(q, r, f, p);
+        if (r->length == 0)
+            nmod_poly_swap(q, f);
+        else
+            break;
+        i++;
+    }
+
+    nmod_poly_clear(q);
+    nmod_poly_clear(r);
+
+    return i;
+}