On Wed, 20 Aug 2008, Martin Morgan wrote:
Hi Jorge --
I hesitate to suggest this unsupported solution (as these public
suggestions tend to mean that the solution disappears!), but in C
Don't use this -- it is subject to change/removal with no notice.
I do not believe there is a C level methanism for catching the R error
conditon at this point. Thinking about this is on the list but it
hasn't happened yet. One thing you can do is use the geterrmessage R
function to retrieve the most recent message (so if R_tryEval
indicates an error occurred then build and execute a call to
geterrmessage and extranct the message from the returned STRSXP).
luke
extern void R_SetErrorHook(void (*)(SEXP, char *));
void
my_ErrorHook(SEXP call, char *message)
{
/*
etc; e.g., cache message, perhaps reset error hook (hook is
removed after error; nested R-level try() may mean multiple
errors per R_tryEval?
*/
}
and then
...
R_SetErrorHook( my_ErrorHook );
PROTECT(value = R_tryEval( expr, env, errorOccurred ));
if( *errorOccurred ) {
/* etc, e.g., retrieve error message(s) from cache */
}
/*
hmm, maybe R_SetErrorHook needs to be cleared here, or at
least replaced with a no-op?
*/
...
This is an R-devel question, not R-help.
Martin
"Jorge W. Cardoso" <[EMAIL PROTECTED]> writes:
I'm writing a C++ application using R-embedding to do some
forecast process.
I also use R_tryEval instead of R_Eval to run my R-script,
so that in case of error I know exactly in which line number
was the last error.
In particular, from time in time y get some error messages
refering an exceptional condition in the arima model.
I want to catch these error messages from de C code
(or at least the code error number) to take some
corrective actions.
Is there any way to do that ?
Regards,
Jorge W. Cardoso
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--
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
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