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ARROW-14704: [C++] Fix Valgrind failure in parquet-arrow-test #11725

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ARROW-14704: [C++] Fix Valgrind failure in parquet-arrow-test #11725

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11 changes: 11 additions & 0 deletions cpp/src/parquet/encoding.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -2175,6 +2175,10 @@ class DeltaBitPackDecoder : public DecoderImpl, virtual public TypedDecoder<DTyp

int GetInternal(T* buffer, int max_values) {
max_values = std::min(max_values, this->num_values_);
if (max_values == 0) {
return 0;
}

DCHECK_LE(static_cast<uint32_t>(max_values), total_value_count_);
int i = 0;
while (i < max_values) {
Expand Down Expand Up @@ -2272,6 +2276,9 @@ class DeltaLengthByteArrayDecoder : public DecoderImpl,
// Decode up to `max_values` strings into an internal buffer
// and reference them into `buffer`.
max_values = std::min(max_values, num_valid_values_);
if (max_values == 0) {
return 0;
}

int32_t data_size = 0;
const int32_t* length_ptr =
Expand Down Expand Up @@ -2406,6 +2413,10 @@ class DeltaByteArrayDecoder : public DecoderImpl,
// Decode up to `max_values` strings into an internal buffer
// and reference them into `buffer`.
max_values = std::min(max_values, num_valid_values_);
if (max_values == 0) {
return max_values;
}

suffix_decoder_.Decode(buffer, max_values);

int64_t data_size = 0;
Expand Down