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| author | Florian Weimer <fweimer@redhat.com> | 2016-10-21 18:26:53 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-10-21 18:26:53 +0200 |
| commit | b3918c44db615637b26d919ce599cd86592316b3 (patch) | |
| tree | 23c031ee3aaf2e2fccce583920cafb40eacdce3f /math/math.h | |
| parent | 0f04fc07f6a36e761ec76100043798ea5c7a590c (diff) | |
| download | glibc-b3918c44db615637b26d919ce599cd86592316b3.zip glibc-b3918c44db615637b26d919ce599cd86592316b3.tar.gz glibc-b3918c44db615637b26d919ce599cd86592316b3.tar.bz2 | |
math: Define iszero as a function template for C++ [BZ #20715]
This increases compatibility with C++ code which is forced to
compile with _GNU_SOURCE.
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/math/math.h b/math/math.h index 880b4a0..0220d08 100644 --- a/math/math.h +++ b/math/math.h @@ -335,11 +335,25 @@ enum # define issubnormal(x) (fpclassify (x) == FP_SUBNORMAL) /* Return nonzero value if X is zero. */ -# ifdef __SUPPORT_SNAN__ -# define iszero(x) (fpclassify (x) == FP_ZERO) -# else -# define iszero(x) (((__typeof (x)) (x)) == 0) -# endif +# ifndef __cplusplus +# ifdef __SUPPORT_SNAN__ +# define iszero(x) (fpclassify (x) == FP_ZERO) +# else +# define iszero(x) (((__typeof (x)) (x)) == 0) +# endif +# else /* __cplusplus */ +__END_DECLS +template <class __T> inline bool +iszero (__T __val) +{ +# ifdef __SUPPORT_SNAN__ + return fpclassify (__val) == FP_ZERO; +# else + return __val == 0; +# endif +} +__BEGIN_DECLS +# endif /* __cplusplus */ #endif /* Use IEC_60559_BFP_EXT. */ #ifdef __USE_MISC |