strtod(3) manual page not clear on error handling when endptr is null

strtod(3) manual page not clear on error handling when endptr is null

[Ed Avis]

strtod(3) says:

>If no conversion is performed, zero is returned and the value of nptr is stored in the location referenced by endptr.

This surely can't be the case if endptr is null.  I believe that the behaviour is more like

>If no conversion is performed, zero is returned, and (unless endptr is null) the value of nptr is stored in the location referenced by endptr.

-- 
Ed Avis <eda-0aTcAJqSNDHby3iVrkZq2A@public.gmane.org>


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Re: strtod(3) manual page not clear on error handling when endptr is null

[Michael Kerrisk (man-pages)]

Hello Ed,

On 04/28/2016 06:31 PM, Ed Avis wrote:
> strtod(3) says:
> 
> If no conversion is performed, zero is returned and the value of nptr
> is stored in the location referenced by endptr.
> 
> This surely can't be the case if endptr is null.  I believe that the
> behaviour is more like
> 
> 
> If no conversion is performed, zero is returned, and (unless endptr
> is null) the value of nptr is stored in the location referenced by
> endptr.

Agreed. Page corrected.

Thanks,

Michael


> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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