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127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <algorithm>
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#include <cstdint>
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#include <cstdlib>
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#include <cstring>
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#include <limits>
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#include <memory>
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#include <string>
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#include <type_traits>
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#include <vector>
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#include "arrow/buffer.h"
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#include "arrow/record_batch.h"
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#include "arrow/status.h"
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#include "arrow/type_fwd.h"
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#include "arrow/util/macros.h"
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#include "arrow/util/visibility.h"
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namespace arrow {
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class Array;
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class ChunkedArray;
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class Column;
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class MemoryPool;
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class RecordBatch;
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class Table;
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using ArrayVector = std::vector<std::shared_ptr<Array>>;
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template <typename T>
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Status CopyBufferFromVector(const std::vector<T>& values, MemoryPool* pool,
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std::shared_ptr<Buffer>* result) {
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int64_t nbytes = static_cast<int>(values.size()) * sizeof(T);
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std::shared_ptr<Buffer> buffer;
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RETURN_NOT_OK(AllocateBuffer(pool, nbytes, &buffer));
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auto immutable_data = reinterpret_cast<const uint8_t*>(values.data());
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std::copy(immutable_data, immutable_data + nbytes, buffer->mutable_data());
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memset(buffer->mutable_data() + nbytes, 0,
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static_cast<size_t>(buffer->capacity() - nbytes));
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*result = buffer;
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return Status::OK();
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}
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// Sets approximately pct_null of the first n bytes in null_bytes to zero
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// and the rest to non-zero (true) values.
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ARROW_EXPORT void random_null_bytes(int64_t n, double pct_null, uint8_t* null_bytes);
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ARROW_EXPORT void random_is_valid(int64_t n, double pct_null, std::vector<bool>* is_valid,
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int random_seed = 0);
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ARROW_EXPORT void random_bytes(int64_t n, uint32_t seed, uint8_t* out);
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ARROW_EXPORT int32_t DecimalSize(int32_t precision);
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ARROW_EXPORT void random_decimals(int64_t n, uint32_t seed, int32_t precision,
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uint8_t* out);
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ARROW_EXPORT void random_ascii(int64_t n, uint32_t seed, uint8_t* out);
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ARROW_EXPORT int64_t CountNulls(const std::vector<uint8_t>& valid_bytes);
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ARROW_EXPORT Status MakeRandomByteBuffer(int64_t length, MemoryPool* pool,
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std::shared_ptr<ResizableBuffer>* out,
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uint32_t seed = 0);
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ARROW_EXPORT uint64_t random_seed();
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template <class T, class Builder>
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Status MakeArray(const std::vector<uint8_t>& valid_bytes, const std::vector<T>& values,
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int64_t size, Builder* builder, std::shared_ptr<Array>* out) {
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// Append the first 1000
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for (int64_t i = 0; i < size; ++i) {
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if (valid_bytes[i] > 0) {
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RETURN_NOT_OK(builder->Append(values[i]));
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} else {
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RETURN_NOT_OK(builder->AppendNull());
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}
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}
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return builder->Finish(out);
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}
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#define DECL_T() typedef typename TestFixture::T T;
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#define DECL_TYPE() typedef typename TestFixture::Type Type;
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// ----------------------------------------------------------------------
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// A RecordBatchReader for serving a sequence of in-memory record batches
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class BatchIterator : public RecordBatchReader {
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public:
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BatchIterator(const std::shared_ptr<Schema>& schema,
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const std::vector<std::shared_ptr<RecordBatch>>& batches)
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: schema_(schema), batches_(batches), position_(0) {}
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std::shared_ptr<Schema> schema() const override { return schema_; }
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Status ReadNext(std::shared_ptr<RecordBatch>* out) override {
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if (position_ >= batches_.size()) {
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*out = nullptr;
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} else {
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*out = batches_[position_++];
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}
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return Status::OK();
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}
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private:
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std::shared_ptr<Schema> schema_;
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std::vector<std::shared_ptr<RecordBatch>> batches_;
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size_t position_;
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};
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} // namespace arrow
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