diff options
Diffstat (limited to 'src/c/elementaryFunctions/log1p/slog1ps.c')
-rw-r--r-- | src/c/elementaryFunctions/log1p/slog1ps.c | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/src/c/elementaryFunctions/log1p/slog1ps.c b/src/c/elementaryFunctions/log1p/slog1ps.c index 04786524..93ab4e73 100644 --- a/src/c/elementaryFunctions/log1p/slog1ps.c +++ b/src/c/elementaryFunctions/log1p/slog1ps.c @@ -1,35 +1,35 @@ -/*
- * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
- * Copyright (C) 2008-2008 - INRIA - Bruno JOFRET
- * Copyright (C) Bruno Pincon
-
- *
- * This file must be used under the terms of the CeCILL.
- * This source file is licensed as described in the file COPYING, which
- * you should have received as part of this distribution. The terms
- * are also available at
- * http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
- *
- */
-
-#include "log1p.h"
-#include "log.h"
-#include "lnp1m1.h"
-
-float slog1ps(float in) {
- static double A = -1.0/3.0;
- static double B = 0.5;
-
- if(in < -1)
- {/* got NaN */
- return (in - in) / (in - in); /* NaN */
- }
- else if(A <= in && in <= B)
- {/* use the function log((1+g)/(1-g)) with g = x/(x + 2) */
- return slnp1m1s(in / (in + 2));
- }
- else
- {/* use the standard formula */
- return slogs(in + 1);
- }
-}
+/* + * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab + * Copyright (C) 2008-2008 - INRIA - Bruno JOFRET + * Copyright (C) Bruno Pincon + + * + * This file must be used under the terms of the CeCILL. + * This source file is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at + * http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt + * + */ + +#include "log1p.h" +#include "log.h" +#include "lnp1m1.h" + +float slog1ps(float in) { + static double A = -1.0/3.0; + static double B = 0.5; + + if(in < -1) + {/* got NaN */ + return (in - in) / (in - in); /* NaN */ + } + else if(A <= in && in <= B) + {/* use the function log((1+g)/(1-g)) with g = x/(x + 2) */ + return slnp1m1s(in / (in + 2)); + } + else + {/* use the standard formula */ + return slogs(in + 1); + } +} |