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List:       erlang-patches
Subject:    [erlang-patches] unix/sys_float.c mishandles errno
From:       bjorn () blanked ! org (Bjorn Gustavsson)
Date:       2008-01-24 9:35:40
Message-ID: o1ve5jzhub.fsf () erix ! ericsson ! se
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"Matthew Dempsky" <matthew> writes:

> The code in unix/sys_float.c assumes that if strtod(3) sets errno to
> ERANGE then there was a problem parsing the value.  However, according
> to POSIX, the actual indication of an error is that it also returned
> 0.0, HUGE_VAL, or -HUGE_VAL.  This causes a problem on OS X 10.5 when
> trying to read denormalized floating-point numbers because OS X's
> strtod(3) implementation sets errno to ERANGE for denormals.
> 
> The patch below changes the errno check to be consistent with POSIX.

Thanks!

We will test the patch in our daily build and include it in R12B-1
if we'll encounter no problems.

/Bjorn
-- 
Bj?rn Gustavsson, Erlang/OTP, Ericsson AB

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