ALL: Add flint

external/flint-2.4.3/double_extras.h

@@ -0,0 +1,68 @@
+/*=============================================================================
+
+    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) 2012 Fredrik Johansson
+
+******************************************************************************/
+
+#ifndef DOUBLE_EXTRAS_H
+#define DOUBLE_EXTRAS_H
+
+#undef ulong
+#define ulong ulongxx /* interferes with system includes */
+#include <math.h>
+#undef ulong
+#include <float.h>
+#include <gmp.h>
+#include "flint.h"
+
+#define ulong mp_limb_t
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#define D_BITS 53
+#define D_EPS 2.2204460492503130808e-16
+#define D_INF HUGE_VAL
+#define D_NAN (HUGE_VAL - HUGE_VAL)
+
+double d_randtest(flint_rand_t state);
+
+static __inline__ double
+d_polyval(const double * poly, int len, double x)
+{
+    double t;
+    int i;
+
+    for (t = poly[len-1], i = len-2; i >= 0; i--)
+        t = poly[i] + x * t;
+
+    return t;
+}
+
+double d_lambertw(double x);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif