wesm commented on a change in pull request #7514:
URL: https://github.com/apache/arrow/pull/7514#discussion_r445127367
##########
File path: r/src/array_from_vector.cpp
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@@ -915,6 +924,39 @@ class Time64Converter : public TimeConverter<Time64Type> {
}
};
+class BinaryVectorConverter : public VectorConverter {
+ public:
+ ~BinaryVectorConverter() {}
+
+ Status Init(ArrayBuilder* builder) {
+ typed_builder_ = checked_cast<BinaryBuilder*>(builder);
+ return Status::OK();
+ }
+
+ Status Ingest(SEXP obj) {
+ ARROW_RETURN_IF(TYPEOF(obj) != VECSXP, Status::RError("Expecting a list"));
+ R_xlen_t n = XLENGTH(obj);
+ for (R_xlen_t i = 0; i < n; i++) {
+ SEXP obj_i = VECTOR_ELT(obj, i);
+ if (Rf_isNull(obj_i)) {
+ RETURN_NOT_OK(typed_builder_->AppendNull());
+ } else {
+ ARROW_RETURN_IF(TYPEOF(obj_i) != RAWSXP,
+ Status::RError("Expecting a raw vector"));
+ RETURN_NOT_OK(typed_builder_->Append(RAW(obj_i), XLENGTH(obj_i)));
Review comment:
You could add a call to `typed_builder_->Reserve` before the loop for
slightly better perf
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