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EDIT :: mathcalls-helper-functions.h

/* Prototype declarations for math classification macros helpers. Copyright (C) 2017-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ /* Classify given number. */ __MATHDECL_1 (int, __fpclassify,, (_Mdouble_ __value)) __attribute__ ((__const__)); /* Test for negative number. */ __MATHDECL_1 (int, __signbit,, (_Mdouble_ __value)) __attribute__ ((__const__)); /* Return 0 if VALUE is finite or NaN, +1 if it is +Infinity, -1 if it is -Infinity. */ __MATHDECL_1 (int, __isinf,, (_Mdouble_ __value)) __attribute__ ((__const__)); /* Return nonzero if VALUE is finite and not NaN. Used by isfinite macro. */ __MATHDECL_1 (int, __finite,, (_Mdouble_ __value)) __attribute__ ((__const__)); /* Return nonzero if VALUE is not a number. */ __MATHDECL_1 (int, __isnan,, (_Mdouble_ __value)) __attribute__ ((__const__)); /* Test equality. */ __MATHDECL_1 (int, __iseqsig,, (_Mdouble_ __x, _Mdouble_ __y)); /* Test for signaling NaN. */ __MATHDECL_1 (int, __issignaling,, (_Mdouble_ __value)) __attribute__ ((__const__));

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