116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
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/* Complex sine function for long double. */
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/* Copyright (C) 1997-1999 Free Software Foundation, Inc.
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This file is part of the GNU ISO C++ Library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this library; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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As a special exception, you may use this file as part of a free software
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library without restriction. Specifically, if other files instantiate
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templates or use macros or inline functions from this file, or you compile
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this file and link it with other files to produce an executable, this
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file does not by itself cause the resulting executable to be covered by
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the GNU General Public License. This exception does not however
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invalidate any other reasons why the executable file might be covered by
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the GNU General Public License. */
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#include <math.h>
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#include "mathconf.h"
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__complex__ long double
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csinl (__complex__ long double x)
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{
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__complex__ long double retval;
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int negate = signbit (__real__ x);
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__real__ x = fabsl (__real__ x);
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if (FINITEL_P (__imag__ x))
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{
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/* Imaginary part is finite. */
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if (FINITEL_P (__real__ x))
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{
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/* Real part is finite. */
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long double sinh_val = sinhl (__imag__ x);
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long double cosh_val = coshl (__imag__ x);
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long double sinix = sinl (__real__ x);
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long double cosix = cosl (__real__ x);
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__real__ retval = cosh_val * sinix;
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__imag__ retval = sinh_val * cosix;
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if (negate)
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__real__ retval = -__real__ retval;
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}
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else
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{
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if (__imag__ x == 0.0)
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{
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/* Imaginary part is 0.0. */
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__real__ retval = NAN;
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__imag__ retval = __imag__ x;
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}
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else
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{
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__real__ retval = NAN;
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__imag__ retval = NAN;
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}
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}
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}
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else if (INFINITEL_P (__imag__ x))
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{
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/* Imaginary part is infinite. */
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if (__real__ x == 0.0)
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{
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/* Real part is 0.0. */
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__real__ retval = copysignl (0.0, negate ? -1.0 : 1.0);
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__imag__ retval = __imag__ x;
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}
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else if (FINITEL_P (__real__ x))
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{
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/* Real part is finite. */
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long double sinix = sinl (__real__ x);
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long double cosix = cosl (__real__ x);
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__real__ retval = copysignl (HUGE_VALL, sinix);
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__imag__ retval = copysignl (HUGE_VALL, cosix);
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if (negate)
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__real__ retval = -__real__ retval;
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if (signbit (__imag__ x))
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__imag__ retval = -__imag__ retval;
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}
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else
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{
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/* The addition raises the invalid exception. */
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__real__ retval = NAN;
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__imag__ retval = HUGE_VALL;
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}
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}
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else
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{
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if (__real__ x == 0.0)
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__real__ retval = copysignl (0.0, negate ? -1.0 : 1.0);
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else
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__real__ retval = NAN;
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__imag__ retval = NAN;
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}
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return retval;
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}
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