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.venv/Lib/site-packages/pyarrow/include/arrow/util/int_util.h

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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.
+
+#pragma once
+
+#include <cstdint>
+#include <type_traits>
+
+#include "arrow/status.h"
+#include "arrow/util/visibility.h"
+
+namespace arrow {
+
+class DataType;
+struct ArrayData;
+struct Datum;
+struct Scalar;
+
+namespace internal {
+
+ARROW_EXPORT
+uint8_t DetectUIntWidth(const uint64_t* values, int64_t length, uint8_t min_width = 1);
+
+ARROW_EXPORT
+uint8_t DetectUIntWidth(const uint64_t* values, const uint8_t* valid_bytes,
+                        int64_t length, uint8_t min_width = 1);
+
+ARROW_EXPORT
+uint8_t DetectIntWidth(const int64_t* values, int64_t length, uint8_t min_width = 1);
+
+ARROW_EXPORT
+uint8_t DetectIntWidth(const int64_t* values, const uint8_t* valid_bytes, int64_t length,
+                       uint8_t min_width = 1);
+
+ARROW_EXPORT
+void DowncastInts(const int64_t* source, int8_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastInts(const int64_t* source, int16_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastInts(const int64_t* source, int32_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastInts(const int64_t* source, int64_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastUInts(const uint64_t* source, uint8_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastUInts(const uint64_t* source, uint16_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastUInts(const uint64_t* source, uint32_t* dest, int64_t length);
+
+ARROW_EXPORT
+void DowncastUInts(const uint64_t* source, uint64_t* dest, int64_t length);
+
+ARROW_EXPORT
+void UpcastInts(const int32_t* source, int64_t* dest, int64_t length);
+
+template <typename InputInt, typename OutputInt>
+inline typename std::enable_if<(sizeof(InputInt) >= sizeof(OutputInt))>::type CastInts(
+    const InputInt* source, OutputInt* dest, int64_t length) {
+  DowncastInts(source, dest, length);
+}
+
+template <typename InputInt, typename OutputInt>
+inline typename std::enable_if<(sizeof(InputInt) < sizeof(OutputInt))>::type CastInts(
+    const InputInt* source, OutputInt* dest, int64_t length) {
+  UpcastInts(source, dest, length);
+}
+
+template <typename InputInt, typename OutputInt>
+ARROW_EXPORT void TransposeInts(const InputInt* source, OutputInt* dest, int64_t length,
+                                const int32_t* transpose_map);
+
+ARROW_EXPORT
+Status TransposeInts(const DataType& src_type, const DataType& dest_type,
+                     const uint8_t* src, uint8_t* dest, int64_t src_offset,
+                     int64_t dest_offset, int64_t length, const int32_t* transpose_map);
+
+/// \brief Do vectorized boundschecking of integer-type array indices. The
+/// indices must be nonnegative and strictly less than the passed upper
+/// limit (which is usually the length of an array that is being indexed-into).
+ARROW_EXPORT
+Status CheckIndexBounds(const ArrayData& indices, uint64_t upper_limit);
+
+/// \brief Boundscheck integer values to determine if they are all between the
+/// passed upper and lower limits (inclusive). Upper and lower bounds must be
+/// the same type as the data and are not currently casted.
+ARROW_EXPORT
+Status CheckIntegersInRange(const Datum& datum, const Scalar& bound_lower,
+                            const Scalar& bound_upper);
+
+/// \brief Use CheckIntegersInRange to determine whether the passed integers
+/// can fit safely in the passed integer type. This helps quickly determine if
+/// integer narrowing (e.g. int64->int32) is safe to do.
+ARROW_EXPORT
+Status IntegersCanFit(const Datum& datum, const DataType& target_type);
+
+}  // namespace internal
+}  // namespace arrow