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/******************************************************************************
* Project: PROJ
* Purpose: Make C99 math functions available on C89 systems
* Author: Kristian Evers
*
******************************************************************************
* Copyright (c) 2018, Kristian Evers
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include "proj_math.h"
/* pj_isnan is used in gie.c which means that is has to */
/* be exported in the Windows DLL and therefore needs */
/* to be declared even though we have isnan() on the */
/* system. */
#ifdef HAVE_C99_MATH
int pj_isnan (double x);
#endif
/* Returns 0 if not a NaN and non-zero if val is a NaN */
int pj_isnan (double x) {
/* cppcheck-suppress duplicateExpression */
return x != x;
}
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