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sum_rcpp.cpp
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58 lines (50 loc) · 1.22 KB
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#include <Rcpp.h>
// clang-format off
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wattributes"
#endif
#ifdef __GNUC__
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wattributes"
#endif
// clang-format on
[[cpp11::register]] SEXP rcpp_sum_dbl_for_(SEXP x_sxp) {
Rcpp::NumericVector x(x_sxp);
R_xlen_t n = x.size();
double sum = 0.;
for (R_xlen_t i = 0; i < n; ++i) {
sum += x[i];
}
return Rf_ScalarReal(sum);
}
[[cpp11::register]] SEXP rcpp_sum_int_for_(SEXP x_sxp) {
Rcpp::IntegerVector x(x_sxp);
R_xlen_t n = x.size();
double sum = 0.;
for (R_xlen_t i = 0; i < n; ++i) {
sum += x[i];
}
return Rf_ScalarReal(sum);
}
[[cpp11::register]] SEXP rcpp_sum_dbl_foreach_(SEXP x_sxp) {
Rcpp::NumericVector x(x_sxp);
double sum = 0.;
for (const auto& val : x) {
sum += val;
}
return Rf_ScalarReal(sum);
}
[[cpp11::register]] SEXP rcpp_sum_dbl_accumulate_(SEXP x_sxp) {
Rcpp::NumericVector x(x_sxp);
return Rf_ScalarReal(std::accumulate(x.cbegin(), x.cend(), 0.));
}
[[cpp11::register]] SEXP rcpp_grow_(SEXP n_sxp) {
R_xlen_t n = REAL(n_sxp)[0];
Rcpp::NumericVector x;
R_xlen_t i = 0;
while (i < n) {
x.push_back(i++);
}
return x;
}