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d6aee922bb
The isnan() and isinf() are C99 macros not functions so use AC_CHECK_DECL instead of AC_CHECK_FUNCS for those.
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Chun-wei Fan <fanc999@yahoo.com.tw>
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*
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* Author: Chun-wei Fan <fanc999@yahoo.com.tw>
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*
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* This 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 of the License, or (at your option) any later version.
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*
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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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <float.h>
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#ifndef HAVE_DECL_ISNAN
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/* it seems of the supported compilers only
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* MSVC does not have isnan(), but it does
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* have _isnan() which does the same as isnan()
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*/
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static inline gboolean
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isnan (double x)
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{
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return _isnan (x);
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}
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#endif
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#ifndef HAVE_DECL_ISINF
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/* Unfortunately MSVC does not have finite()
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* but it does have _finite() which is the same
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* as finite() except when x is a NaN
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*/
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static inline gboolean
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isinf (double x)
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{
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return (!_finite (x) && !_isnan (x));
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}
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#endif
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