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sum.cpp
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60 lines (50 loc) · 1.25 KB
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#include <numeric>
#include "cpp11/doubles.hpp"
[[cpp11::register]] double sum_dbl_for_(cpp11::doubles x) {
double sum = 0.;
R_xlen_t n = x.size();
for (R_xlen_t i = 0; i < n; ++i) {
sum += x[i];
}
return sum;
}
[[cpp11::register]] double sum_dbl_for2_(SEXP x_sxp) {
double sum = 0.;
const cpp11::doubles x(x_sxp, false);
R_xlen_t n = x.size();
for (R_xlen_t i = 0; i < n; ++i) {
sum += x[i];
}
return sum;
}
[[cpp11::register]] double sum_dbl_for3_(SEXP x_sxp) {
double sum = 0.;
const cpp11::writable::doubles x(x_sxp, false);
R_xlen_t n = x.size();
for (R_xlen_t i = 0; i < n; ++i) {
sum += x[i];
}
return sum;
}
[[cpp11::register]] double sum_dbl_foreach_(cpp11::doubles x) {
double sum = 0.;
for (const auto&& val : x) {
sum += val;
}
return sum;
}
[[cpp11::register]] double sum_dbl_foreach2_(SEXP x_sxp) {
const cpp11::doubles x(x_sxp, false);
double sum = 0.;
for (const auto&& val : x) {
sum += val;
}
return sum;
}
[[cpp11::register]] double sum_dbl_accumulate_(cpp11::doubles x) {
return std::accumulate(x.cbegin(), x.cend(), 0.);
}
[[cpp11::register]] double sum_dbl_accumulate2_(SEXP x_sxp) {
const cpp11::doubles x(x_sxp, false);
return std::accumulate(x.cbegin(), x.cend(), 0.);
}