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json_writer: improve isfinite support on *nix

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Based on a patches to CMake by:

Ådne Hovda <ahovda@openit.com>:

    commit 7b1cdb00279908cacabada92f8a53e4986465423

    jsoncpp: Provide 'isfinite' implementation on older AIX and HP-UX

    Newer AIX and HP-UX platforms provide 'isfinite' as a <math.h> macro.
    Older versions do not, so add the definition if it is not provided.

Michael Scott <michael.scott@gbgplc.com>:

    commit 9217b678b305d7df7471ba476a81bf28961fdfa3

    jsoncpp: Provide 'isfinite' impl on more HP-UX versions (#15576)

    Some versions of HP-UX do not define 'isfinite' or 'finite' in math.h
    for Itanium when preprocessing with C++, so we have to add the
    definition ourselves instead to map to the internal version.

Joerg Sonnenberger <joerg@bec.de>:

    commit 75644dafe54c21902f14cfe58cb8338b553b69d8

    jsoncpp: Fix compilation as C99 on Solaris

    In C99 mode, Solaris variants may already define isfinite, so check for
    the existence first.
This commit is contained in:
Ben Boeckel 2015-10-01 13:20:37 -04:00
parent 8e400e9be7
commit 8df11d518b
1 changed files with 17 additions and 0 deletions
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17
src/lib_json/json_writer.cpp
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@ -20,8 +20,25 @@
#include <float.h>
#define isfinite _finite
#elif defined(__sun) && defined(__SVR4) //Solaris
#if !defined(isfinite)
#include <ieeefp.h>
#define isfinite finite
#endif
#elif defined(_AIX)
#if !defined(isfinite)
#include <math.h>
#define isfinite finite
#endif
#elif defined(__hpux)
#if !defined(isfinite)
#if defined(__ia64) && !defined(finite)
#define isfinite(x) ((sizeof(x) == sizeof(float) ? \
_Isfinitef(x) : _IsFinite(x)))
#else
#include <math.h>
#define isfinite finite
#endif
#endif
#else
#include <cmath>
#define isfinite std::isfinite