[R-pkg-devel] Error handling in C code

[Duncan Murdoch]

Most functions in R have a prefix on their name, with aliases defined so 
you can use the function without the prefix.  But you can turn off the 
aliasing, in which case you need the true name.  I think for all of the 
functions you list the prefix is "Rf_", so they are "Rf_error", etc.

Perhaps you turned off the aliasing?

Duncan Murdoch

On 03/05/2024 11:17 a.m., Jarrod Hadfield wrote:
> Hi,
> 
> I have an R library with C code in it. It has failed the CRAN checks for Debian.  The problem is with the error function being undefined. Section 6.2 of the Writing R extensions (see below) suggests error handling can be handled by error and the appropriate header file is included in R.h, but this seems not to be the case?
> 
> Any help would be appreciated!
> 
> Thanks,
> 
> Jarrod
> 
> 6.2 Error signaling
> 
> The basic error signaling routines are the equivalents of stop and warning in R code, and use the same interface.
> 
> void error(const char * format, ...);
> void warning(const char * format, ...);
> void errorcall(SEXP call, const char * format, ...);
> void warningcall(SEXP call, const char * format, ...);
> void warningcall_immediate(SEXP call, const char * format, ...);
> 
> These have the same call sequences as calls to printf, but in the simplest case can be called with a single character string argument giving the error message. (Don�t do this if the string contains �%� or might otherwise be interpreted as a format.)
> 
> These are defined in header R_ext/Error.h included by R.h.
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