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| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
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| #include "arrow/array/array_nested.h" | ||
| #include "arrow/tensor.h" | ||
| #include "arrow/util/checked_cast.h" | ||
| #include "arrow/util/int_util_overflow.h" | ||
| #include "arrow/util/sort.h" | ||
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| #include "arrow/status.h" | ||
| #include "arrow/util/logging.h" | ||
| #include "arrow/util/print.h" | ||
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| namespace arrow::internal { | ||
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| Status IsPermutationValid(const std::vector<int64_t>& permutation) { | ||
| const auto size = static_cast<int64_t>(permutation.size()); | ||
| std::vector<uint8_t> dim_seen(size, 0); | ||
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| for (const auto p : permutation) { | ||
| if (p < 0 || p >= size || dim_seen[p] != 0) { | ||
| return Status::Invalid( | ||
| "Permutation indices for ", size, | ||
| " dimensional tensors must be unique and within [0, ", size - 1, | ||
| "] range. Got: ", ::arrow::internal::PrintVector{permutation, ","}); | ||
| } | ||
| dim_seen[p] = 1; | ||
| } | ||
| return Status::OK(); | ||
| } | ||
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| Result<std::vector<int64_t>> ComputeStrides(const std::shared_ptr<DataType>& value_type, | ||
| const std::vector<int64_t>& shape, | ||
| const std::vector<int64_t>& permutation) { | ||
| const auto fixed_width_type = | ||
| internal::checked_pointer_cast<FixedWidthType>(value_type); | ||
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| std::vector<int64_t> strides; | ||
| if (permutation.empty()) { | ||
| ARROW_DCHECK_OK( | ||
| internal::ComputeRowMajorStrides(*fixed_width_type.get(), shape, &strides)); | ||
| return strides; | ||
| } | ||
| const int byte_width = value_type->byte_width(); | ||
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| int64_t remaining = 0; | ||
| if (!shape.empty() && shape.front() > 0) { | ||
| remaining = byte_width; | ||
| for (auto i : permutation) { | ||
| if (i > 0) { | ||
| if (internal::MultiplyWithOverflow(remaining, shape[i], &remaining)) { | ||
| return Status::Invalid( | ||
| "Strides computed from shape would not fit in 64-bit integer"); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| if (remaining == 0) { | ||
| strides.assign(shape.size(), byte_width); | ||
| return strides; | ||
| } | ||
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| strides.push_back(remaining); | ||
| for (auto i : permutation) { | ||
| if (i > 0) { | ||
| remaining /= shape[i]; | ||
| strides.push_back(remaining); | ||
| } | ||
| } | ||
| DCHECK_EQ(strides.back(), byte_width); | ||
| Permute(permutation, &strides); | ||
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| return strides; | ||
| } | ||
| } // namespace arrow::internal |
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