51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
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// 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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#include "arrow/python/util.h"
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#include "arrow/array.h"
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#include "arrow/python/common.h"
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namespace arrow ::py {
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Result<std::shared_ptr<Array>> Arange(int64_t start, int64_t stop, int64_t step,
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MemoryPool* pool) {
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int64_t size;
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if (step == 0) {
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return Status::Invalid("Step must not be zero");
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}
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if (step > 0 && stop > start) {
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// Ceiling division for positive step
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size = (stop - start + step - 1) / step;
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} else if (step < 0 && stop < start) {
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// Ceiling division for negative step
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size = (start - stop - step - 1) / (-step);
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} else {
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return MakeEmptyArray(int64());
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}
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std::shared_ptr<Buffer> data_buffer;
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ARROW_ASSIGN_OR_RAISE(data_buffer, AllocateBuffer(size * sizeof(int64_t), pool));
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auto values = reinterpret_cast<int64_t*>(data_buffer->mutable_data());
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for (int64_t i = 0; i < size; ++i) {
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values[i] = start + i * step;
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}
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auto data = ArrayData::Make(int64(), size, {nullptr, data_buffer}, 0);
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return MakeArray(data);
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}
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} // namespace arrow::py
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