Please do read the posting guide (clearly you have not as you sent HTML).
- This is the wrong list: it is a question about C code.
- In any case, it is about C. The R Internals manual may help you,
otherwise you need to talk to a local C adviser. (Even if this were not
off-topic here, we do not know what it is you cannot 'figure out' and
you need to interact with someone.)
On 19/08/2014 11:14, PO SU wrote:
Dear Rusers,
when i am reading Rinternals.h file, i can't understand the following
codes in lines 395-407:
#define CHAR(x)R_CHAR(x)
const char *(R_CHAR)(SEXP x);
/* Various tests with macro versions below */
Rboolean (Rf_isNull)(SEXP s);
Rboolean (Rf_isSymbol)(SEXP s);
Rboolean (Rf_isLogical)(SEXP s);
Rboolean (Rf_isReal)(SEXP s);
Rboolean (Rf_isComplex)(SEXP s);
Rboolean (Rf_isExpression)(SEXP s);
Rboolean (Rf_isEnvironment)(SEXP s);
Rboolean (Rf_isString)(SEXP s);
Rboolean (Rf_isObject)(SEXP s);
I can't figure out what are "R_CHAR,Rf_isNull....Rf_isObject" meaning, they
seem like function declarations, Rf_XXX maybe function pointers?
I need your help.
--
PO SU
mail: desolato...@163.com
Majored in Statistics from SJTU
[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK
______________________________________________
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and provide commented, minimal, self-contained, reproducible code.
