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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* Return arc hyperbole sine for long double value.
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Copyright (C) 1997-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <complex.h>
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#include <math.h>
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#include <math_private.h>
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__complex__ long double
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__casinhl (__complex__ long double x)
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{
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__complex__ long double res;
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int rcls = fpclassify (__real__ x);
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int icls = fpclassify (__imag__ x);
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if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
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{
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if (icls == FP_INFINITE)
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{
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__real__ res = __copysignl (HUGE_VALL, __real__ x);
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if (rcls == FP_NAN)
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__imag__ res = __nanl ("");
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else
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__imag__ res = __copysignl (rcls >= FP_ZERO ? M_PI_2l : M_PI_4l,
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__imag__ x);
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}
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else if (rcls <= FP_INFINITE)
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{
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__real__ res = __real__ x;
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if ((rcls == FP_INFINITE && icls >= FP_ZERO)
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|| (rcls == FP_NAN && icls == FP_ZERO))
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__imag__ res = __copysignl (0.0, __imag__ x);
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else
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__imag__ res = __nanl ("");
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}
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else
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{
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__real__ res = __nanl ("");
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__imag__ res = __nanl ("");
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}
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}
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else if (rcls == FP_ZERO && icls == FP_ZERO)
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{
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res = x;
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}
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else
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{
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res = __kernel_casinhl (x, 0);
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}
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return res;
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}
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weak_alias (__casinhl, casinhl)
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