[R] Accessing C source files

[peter dalgaard]

Also, Uwe's "Accessing the sources": https://cran.r-project.org/doc/Rnews/Rnews_2006-4.pdf, p.43.

It's a bit old, but I don't think massively out of date, except possibly with respect to name mangling like thee C_ prefix.

-pd

> On 5 Aug 2019, at 15:31 , Jeff Newmiller <jdnewmil using dcn.davis.ca.us> wrote:
> 
> Seems like you are looking in the wrong place. Did you download the source code? [1]
> 
> [1] https://cran.r-project.org/
> 
> On August 5, 2019 6:18:14 AM PDT, ravi via R-help <r-help using r-project.org> wrote:
>> Hi all,On looking at the source code for the integrate function, I find
>> that it has the following call:
>> wk <- .External(C_call_dqagi, ff, rho = environment(),            
>> as.double(bound), inf, as.double(abs.tol), as.double(rel.tol),        
>>     limit = limit)How do I access the source code for C_call_dqagi?
>> From other references ("Writing R-extensions section 6.9), I find a
>> reference to Rdqagi when discussing the integrate function. I would
>> like to know if C_call_dqagi and Rdqagi are the same.How do I access
>> the source code for either of these functions? From the article titled
>> "R help desk Acessing the sources" by Uwe Ligges in Rnews_2006-4, I
>> gather that the C files can be found in the folder $R_HOME/src/main/.
>> But when I look at the equivalent folder in R 3.6.1, I find that the
>> main sub-folder is missing in src (the only sub-folder found there is
>> library). I do not find any C file in the src subfolder 
>> Where do I find the C source files? How do I get to look at them? I
>> have a lot of follow-up questions on interfacing with the C files, but
>> I would like to first know where I can find them. At least on how I can
>> access them.Thanks,Ravi Sutradhara
>> 
>> 
>> 	[[alternative HTML version deleted]]
>> 
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> 
> -- 
> Sent from my phone. Please excuse my brevity.
> 
> ______________________________________________
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-- 
Peter Dalgaard, Professor,
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