| 1 | /* Compute argument of complex double value.
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| 2 | Copyright (C) 1997 Free Software Foundation, Inc.
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| 3 | This file is part of the GNU C Library.
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| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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| 5 |
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| 6 | The GNU C Library is free software; you can redistribute it and/or
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| 7 | modify it under the terms of the GNU Lesser General Public
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| 8 | License as published by the Free Software Foundation; either
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| 9 | version 2.1 of the License, or (at your option) any later version.
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| 10 |
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| 11 | The GNU C Library is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | Lesser General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU Lesser General Public
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| 17 | License along with the GNU C Library; if not, write to the Free
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| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 19 | 02111-1307 USA. */
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| 20 |
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| 21 | #include <complex.h>
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| 22 | #include <math.h>
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| 23 |
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| 24 | double
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| 25 | __carg (__complex__ double x)
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| 26 | {
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| 27 | return __atan2 (__imag__ x, __real__ x);
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| 28 | }
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| 29 | weak_alias (__carg, carg)
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| 30 | #ifdef NO_LONG_DOUBLE
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| 31 | strong_alias (__carg, __cargl)
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| 32 | weak_alias (__carg, cargl)
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| 33 | #endif
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