Hey Avi,

Thank you very much for your valuable suggestion. It works fine now.

Many thanks,

Waleed

> On Nov 30, 2017, at 11:02 AM, Waleed Almutiry <walmu...@uoguelph.ca> wrote:
> 
> Hey Avi,
> 
> Thank you for your valuable help and suggestion. That’s a great work to 
> handle the infinity and NAN values. I will implement it in my code and see 
> how it works.
> 
> Many thanks,
> 
> Waleed
> 
>> On Nov 30, 2017, at 10:46 AM, Avraham Adler <avraham.ad...@gmail.com> wrote:
>> 
>> On Wed, Nov 29, 2017 at 4:37 PM, Waleed Almutiry <walmu...@uoguelph.ca> 
>> wrote:
>>> Hi all,
>>> 
>>> I tried to upload my package to CRAN and did not pass the the incoming 
>>> checks. This was because the use of ieee_arithmetic module in a fortran 
>>> subroutine in the src folder. I built and checked the package using (R CMD 
>>> build) and (R CMD check) under IOS system and it is working fine without 
>>> errors. The gcc version in my system is (GNU Fortran (GCC) 5.2.0) while the 
>>> gcc version in the CRAN system is 4.9.3. This is the message that I have 
>>> got from the CRAN:
>> [snip]
>>> 
>>> I used the ieee_arithmetic in some subroutines to read and write results of 
>>> Infinity values. I used it inside the subroutine as
>>> 
>>> IF (ieee_support_inf(Inf)) THEN Inf = ieee_value(Inf, ieee_positive_inf) 
>>> END IF
>>> 
>> 
>> Hello, Waleed.
>> 
>> I handled Inf and NaN by writing a C function that passes the magic
>> code words R_NaN and INFINITY and called them as external functions in
>> Fortran. See the source code of 'utils_and_wrappers.c' and
>> 'delaporte.f95' at [1] for a working example of "set_nan" and
>> "set_inf"ideas. Originally, I used the actual bitpatterns to make the
>> functions pure, if not elemental, but Soldaris SPARC through a fit
>> since it was the opposite endian from the rest of the known universe.
>> Using the magic R words will ensure that the proper values will be
>> passed regardless of platform.
>> 
>> Hope that helps,
>> 
>> Avi
>> 
>> [1] https://bitbucket.org/aadler/delaporte
> 

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