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author | baudin | 2010-06-04 12:56:48 +0000 |
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committer | baudin | 2010-06-04 12:56:48 +0000 |
commit | cdb84e8f913b5573da8ccef12b88ac48c09cf54e (patch) | |
tree | 9de1200a1d78501f62c894bf1a0572416605387b /src/c/elementaryFunctions/log/clogs.c | |
parent | 44f7c2ff4af89a5802bce86c42cffd56d1a84d08 (diff) | |
download | scilab2c-cdb84e8f913b5573da8ccef12b88ac48c09cf54e.tar.gz scilab2c-cdb84e8f913b5573da8ccef12b88ac48c09cf54e.tar.bz2 scilab2c-cdb84e8f913b5573da8ccef12b88ac48c09cf54e.zip |
Fixed missing copyright notice.
Diffstat (limited to 'src/c/elementaryFunctions/log/clogs.c')
-rw-r--r-- | src/c/elementaryFunctions/log/clogs.c | 129 |
1 files changed, 65 insertions, 64 deletions
diff --git a/src/c/elementaryFunctions/log/clogs.c b/src/c/elementaryFunctions/log/clogs.c index d402d1d1..3b9f6911 100644 --- a/src/c/elementaryFunctions/log/clogs.c +++ b/src/c/elementaryFunctions/log/clogs.c @@ -1,64 +1,65 @@ -/* - * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab - * Copyright (C) 2007-2008 - INRIA - Bruno JOFRET - * - * 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 <math.h> -#include "log.h" -#include "lapack.h" -#include "log1p.h" -#include "pythag.h" - -floatComplex clogs(floatComplex in) { - static float sR2 = 1.41421356237309504f; - - float _RealIn = creals(in); - float _ImgIn = cimags(in); - - float _RealOut = 0; - float _ImgOut = 0; - - float RMax = (float) getOverflowThreshold(); - float LInf = sqrtf((float) getUnderflowThreshold()); - float LSup = sqrtf(0.5f * RMax); - - float AbsReal = fabsf(_RealIn); - float AbsImg = fabsf(_ImgIn); - - _ImgOut = atan2f(_ImgIn, _RealIn); - - if(_ImgIn > _RealIn) - {/* switch Real part and Imaginary part */ - float Temp = AbsReal; - AbsReal = AbsImg; - AbsImg = Temp; - } - - if((0.5 <= AbsReal) && (AbsReal <= sR2)) - _RealOut = 0.5f * slog1ps((AbsReal - 1.0f) * (AbsReal + 1.0f) + AbsImg * AbsImg); - else if(LInf < AbsImg && AbsReal < LSup) - _RealOut = 0.5f * slogs(AbsReal * AbsReal + AbsImg * AbsImg); - else if(AbsReal > RMax) - _RealOut = AbsReal; - else - { - float Temp = spythags(AbsReal, AbsImg); - if(Temp <= RMax) - { - _RealOut = slogs(Temp); - } - else /* handle rare spurious overflow with : */ - { - float Temp2 = AbsImg/AbsReal; - _RealOut = slogs(AbsReal) + 0.5f * slog1ps(Temp2 * Temp2); - } - } - return FloatComplex(_RealOut, _ImgOut); -} +/*
+ * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ * Copyright (C) 2007-2008 - 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 <math.h>
+#include "log.h"
+#include "lapack.h"
+#include "log1p.h"
+#include "pythag.h"
+
+floatComplex clogs(floatComplex in) {
+ static float sR2 = 1.41421356237309504f;
+
+ float _RealIn = creals(in);
+ float _ImgIn = cimags(in);
+
+ float _RealOut = 0;
+ float _ImgOut = 0;
+
+ float RMax = (float) getOverflowThreshold();
+ float LInf = sqrtf((float) getUnderflowThreshold());
+ float LSup = sqrtf(0.5f * RMax);
+
+ float AbsReal = fabsf(_RealIn);
+ float AbsImg = fabsf(_ImgIn);
+
+ _ImgOut = atan2f(_ImgIn, _RealIn);
+
+ if(_ImgIn > _RealIn)
+ {/* switch Real part and Imaginary part */
+ float Temp = AbsReal;
+ AbsReal = AbsImg;
+ AbsImg = Temp;
+ }
+
+ if((0.5 <= AbsReal) && (AbsReal <= sR2))
+ _RealOut = 0.5f * slog1ps((AbsReal - 1.0f) * (AbsReal + 1.0f) + AbsImg * AbsImg);
+ else if(LInf < AbsImg && AbsReal < LSup)
+ _RealOut = 0.5f * slogs(AbsReal * AbsReal + AbsImg * AbsImg);
+ else if(AbsReal > RMax)
+ _RealOut = AbsReal;
+ else
+ {
+ float Temp = spythags(AbsReal, AbsImg);
+ if(Temp <= RMax)
+ {
+ _RealOut = slogs(Temp);
+ }
+ else /* handle rare spurious overflow with : */
+ {
+ float Temp2 = AbsImg/AbsReal;
+ _RealOut = slogs(AbsReal) + 0.5f * slog1ps(Temp2 * Temp2);
+ }
+ }
+ return FloatComplex(_RealOut, _ImgOut);
+}
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