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#pragma once
#include <algorithm> // for min
#include <array> // for array
#include <initializer_list> // for initializer_list
#include "R_ext/Arith.h" // for NA_INTEGER
#include "cpp11/R.hpp" // for SEXP, SEXPREC, Rf_allocVector
#include "cpp11/as.hpp" // for as_sexp
#include "cpp11/attribute_proxy.hpp" // for attribute_proxy
#include "cpp11/protect.hpp" // for safe
#include "cpp11/r_vector.hpp" // for r_vector, r_vector<>::proxy
#include "cpp11/sexp.hpp" // for sexp
// Specializations for integers
namespace cpp11 {
template <>
inline SEXPTYPE r_vector<int>::get_sexptype() {
return INTSXP;
}
template <>
inline typename r_vector<int>::underlying_type r_vector<int>::get_elt(SEXP x,
R_xlen_t i) {
// NOPROTECT: likely too costly to unwind protect every elt
return INTEGER_ELT(x, i);
}
template <>
inline typename r_vector<int>::underlying_type* r_vector<int>::get_p(bool is_altrep,
SEXP data) {
if (is_altrep) {
return nullptr;
} else {
return INTEGER(data);
}
}
template <>
inline typename r_vector<int>::underlying_type const* r_vector<int>::get_const_p(
bool is_altrep, SEXP data) {
return INTEGER_OR_NULL(data);
}
template <>
inline void r_vector<int>::get_region(SEXP x, R_xlen_t i, R_xlen_t n,
typename r_vector::underlying_type* buf) {
// NOPROTECT: likely too costly to unwind protect here
INTEGER_GET_REGION(x, i, n, buf);
}
template <>
inline bool r_vector<int>::const_iterator::use_buf(bool is_altrep) {
return is_altrep;
}
typedef r_vector<int> integers;
namespace writable {
template <>
inline void r_vector<int>::set_elt(SEXP x, R_xlen_t i,
typename r_vector::underlying_type value) {
// NOPROTECT: Likely too costly to unwind protect every set elt
SET_INTEGER_ELT(x, i, value);
}
typedef r_vector<int> integers;
} // namespace writable
template <>
inline int na() {
return NA_INTEGER;
}
// forward declaration
typedef r_vector<double> doubles;
inline integers as_integers(SEXP x) {
if (detail::r_typeof(x) == INTSXP) {
return integers(x);
} else if (detail::r_typeof(x) == REALSXP) {
doubles xn(x);
writable::integers ret(xn.size());
std::transform(xn.begin(), xn.end(), ret.begin(), [](double value) {
if (ISNA(value)) {
return NA_INTEGER;
}
if (!is_convertible_without_loss_to_integer(value)) {
throw std::runtime_error("All elements must be integer-like");
}
return static_cast<int>(value);
});
return ret;
}
throw type_error(INTSXP, detail::r_typeof(x));
}
} // namespace cpp11
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