mathyingzhou commented on a change in pull request #8648:
URL: https://github.com/apache/arrow/pull/8648#discussion_r612962806
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File path: cpp/src/arrow/adapters/orc/adapter_test.cc
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@@ -58,6 +82,182 @@ class MemoryOutputStream : public liborc::OutputStream {
uint64_t length_, natural_write_size_;
};
+std::shared_ptr<Buffer> GenerateFixedDifferenceBuffer(int32_t fixed_length,
+ int64_t length) {
+ BufferBuilder builder;
+ int32_t offsets[length];
+ ARROW_EXPECT_OK(builder.Resize(4 * length));
+ for (int32_t i = 0; i < length; i++) {
+ offsets[i] = fixed_length * i;
+ }
+ ARROW_EXPECT_OK(builder.Append(offsets, 4 * length));
+ std::shared_ptr<Buffer> buffer;
+ ARROW_EXPECT_OK(builder.Finish(&buffer));
+ return buffer;
+}
+
+std::shared_ptr<Array> CastFixedSizeBinaryArrayToBinaryArray(
+ std::shared_ptr<Array> array) {
+ auto fixed_size_binary_array =
std::static_pointer_cast<FixedSizeBinaryArray>(array);
+ std::shared_ptr<Buffer> value_offsets = GenerateFixedDifferenceBuffer(
+ fixed_size_binary_array->byte_width(), array->length() + 1);
+ return std::make_shared<BinaryArray>(array->length(), value_offsets,
+ array->data()->buffers[1],
+ array->data()->buffers[0]);
+}
+
+template <typename TargetArrayType>
+std::shared_ptr<Array> CastInt64ArrayToTemporalArray(
+ const std::shared_ptr<DataType>& type, std::shared_ptr<Array> array) {
+ std::shared_ptr<ArrayData> new_array_data =
+ ArrayData::Make(type, array->length(), array->data()->buffers);
+ return std::make_shared<TargetArrayType>(new_array_data);
+}
+
+template <typename T, typename U>
+void randintpartition(int64_t n, T sum, std::vector<U>* out) {
Review comment:
Ah. Yes. Eventually I plan to relocate the code to the place where we
generate random arrays since this functionality helps generating random
ChunkedArrays.
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