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Introduce __isnanf() as an alias for isnanf(), and make the isnan()

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macro expand to __isnanf() instead of isnanf() for float arguments.
This change is needed because isnanf() isn't declared in strict POSIX
or C99 mode.

Compatibility note: Apps using isnan(float) that are compiled after
this change won't link against an older libm.

Reported by:	Florian Forster <octo@verplant.org>
This commit is contained in:
David Schultz 2010-06-12 17:32:05 +00:00
parent dd73646c6c
commit efd0f253c2
3 changed files with 10 additions and 2 deletions
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5
lib/msun/Symbol.map
View File

@ -218,3 +218,8 @@ FBSD_1.1 {
cprojf;
cprojl;
};
/* First added in 9.0-CURRENT */
FBSD_1.2 {
__isnanf;
};

3
lib/msun/src/math.h
View File

@ -97,7 +97,7 @@ extern const union __nan_un {
: (sizeof (x) == sizeof (double)) ? isinf(x) \
: __isinfl(x))
#define isnan(x) \
((sizeof (x) == sizeof (float)) ? isnanf(x) \
((sizeof (x) == sizeof (float)) ? __isnanf(x) \
: (sizeof (x) == sizeof (double)) ? isnan(x) \
: __isnanl(x))
#define isnormal(x) \
@ -179,6 +179,7 @@ int __isfinite(double) __pure2;
int __isfinitel(long double) __pure2;
int __isinff(float) __pure2;
int __isinfl(long double) __pure2;
int __isnanf(float) __pure2;
int __isnanl(long double) __pure2;
int __isnormalf(float) __pure2;
int __isnormal(double) __pure2;

4
lib/msun/src/s_isnan.c
View File

@ -43,7 +43,7 @@ isnan(double d)
#endif
int
isnanf(float f)
__isnanf(float f)
{
union IEEEf2bits u;
@ -60,3 +60,5 @@ __isnanl(long double e)
mask_nbit_l(u);
return (u.bits.exp == 32767 && (u.bits.manl != 0 || u.bits.manh != 0));
}
__weak_reference(__isnanf, isnanf);