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42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* Compute projection of complex long double value to Riemann sphere.
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Copyright (C) 1997-2013 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_ldbl_opt.h>
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__complex__ long double
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__cprojl (__complex__ long double x)
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{
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if (isnan (__real__ x) && isnan (__imag__ x))
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return x;
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else if (!isfinite (__real__ x) || !isfinite (__imag__ x))
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{
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__complex__ long double res;
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__real__ res = INFINITY;
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__imag__ res = __copysignl (0.0, __imag__ x);
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return res;
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}
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return x;
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}
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long_double_symbol (libm, __cprojl, cprojl);
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