bkietz commented on code in PR #38027:
URL: https://github.com/apache/arrow/pull/38027#discussion_r1391922412
##########
cpp/src/arrow/array/data.h:
##########
@@ -434,6 +434,21 @@ struct ARROW_EXPORT ArraySpan {
return GetValues<T>(i, this->offset);
}
+ // Access a buffer's data as a span
+ template <typename T>
+ util::span<const T> GetSpan(int i) const {
+ return util::span(buffers[i].data_as<T>(),
+ static_cast<size_t>(buffers[i].size) / sizeof(T))
+ .subspan(offset);
+ }
+
+ template <typename T>
+ util::span<T> GetSpan(int i) {
+ return util::span(buffers[i].mutable_data_as<T>(),
+ static_cast<size_t>(buffers[i].size) / sizeof(T))
+ .subspan(offset);
Review Comment:
The buffers may be longer.
It'd be nicer if the spans could be sliced to reflect the array length, but
what about offset buffers? It seems we'd need to incorporate layout info.
Doable, but maybe not worth it here?
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