1 files changed, 0 insertions, 77 deletions
diff --git a/nuttx/lib/math/lib_logf.c b/nuttx/lib/math/lib_logf.c
deleted file mode 100644
index 1d31aa0c0..000000000
--- a/nuttx/lib/math/lib_logf.c
+++ /dev/null
@@ -1,77 +0,0 @@
-/************************************************************************
- * lib/math/lib_logf.c
- *
- * This file is a part of NuttX:
- *
- *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
- *   Ported by: Darcy Gong
- *
- * It derives from the Rhombs OS math library by Nick Johnson which has
- * a compatibile, MIT-style license:
- *
- * Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
- * 
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- ************************************************************************/
-
-/************************************************************************
- * Included Files
- ************************************************************************/
-
-#include <math.h>
-#include <float.h>
-
-/************************************************************************
- * Public Functions
- ************************************************************************/
-
-float logf(float x)
-{
-  float y, y_old, ey, epsilon;
-
-  y = 0.0;
-  y_old = 1.0;
-  epsilon = FLT_EPSILON;
-
-  while (y > y_old + epsilon || y < y_old - epsilon)
-    {
-      y_old = y;
-      ey = exp(y);
-      y -= (ey - x) / ey;
-
-      if (y > 700.0)
-        {
-          y = 700.0;
-        }
-
-      if (y < -700.0)
-        {
-          y = -700.0;
-        }
-
-      epsilon = (fabs(y) > 1.0) ? fabs(y) * FLT_EPSILON : FLT_EPSILON;
-    }
-
-  if (y == 700.0)
-    {
-      return INFINITY;
-    }
-
-  if (y == -700.0)
-    {
-      return INFINITY;
-    }
-
-  return y;
-}