ALL: Add flint

external/flint-2.4.3/nmod_vec/max_bits.c

@@ -0,0 +1,48 @@
+/*=============================================================================
+
+    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 <stdlib.h>
+#include <gmp.h>
+#include "flint.h"
+#include "nmod_vec.h"
+
+mp_bitcnt_t _nmod_vec_max_bits(mp_srcptr vec, slong len)
+{
+   mp_bitcnt_t bits = 0;
+   mp_limb_t mask   = ~(mp_limb_t) 0;
+   slong i;
+   
+   for (i = 0; i < len; i++)
+   {
+      if (vec[i] & mask)
+      {
+         bits = FLINT_BIT_COUNT(vec[i]);
+         if (bits == FLINT_BITS) break;
+         else mask = ~(mp_limb_t) 0 - ((UWORD(1) << bits) - UWORD(1));
+      }
+   }
+   
+   return bits;
+}