131 lines
5.1 KiB
C++
131 lines
5.1 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 <cstdint>
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#include "parquet/types.h"
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namespace parquet {
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// Abstract class for hash
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class Hasher {
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public:
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/// Compute hash for 32 bits value by using its plain encoding result.
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///
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/// @param value the value to hash.
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/// @return hash result.
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virtual uint64_t Hash(int32_t value) const = 0;
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/// Compute hash for 64 bits value by using its plain encoding result.
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///
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/// @param value the value to hash.
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/// @return hash result.
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virtual uint64_t Hash(int64_t value) const = 0;
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/// Compute hash for float value by using its plain encoding result.
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///
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/// @param value the value to hash.
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/// @return hash result.
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virtual uint64_t Hash(float value) const = 0;
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/// Compute hash for double value by using its plain encoding result.
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///
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/// @param value the value to hash.
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/// @return hash result.
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virtual uint64_t Hash(double value) const = 0;
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/// Compute hash for Int96 value by using its plain encoding result.
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///
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/// @param value the value to hash.
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/// @return hash result.
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virtual uint64_t Hash(const Int96* value) const = 0;
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/// Compute hash for ByteArray value by using its plain encoding result.
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///
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/// @param value the value to hash.
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/// @return hash result.
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virtual uint64_t Hash(const ByteArray* value) const = 0;
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/// Compute hash for fixed byte array value by using its plain encoding result.
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///
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/// @param value the value address.
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/// @param len the value length.
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virtual uint64_t Hash(const FLBA* value, uint32_t len) const = 0;
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/// Batch compute hashes for 32 bits values by using its plain encoding result.
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///
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/// @param values a pointer to the values to hash.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const int32_t* values, int num_values, uint64_t* hashes) const = 0;
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/// Batch compute hashes for 64 bits values by using its plain encoding result.
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///
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/// @param values a pointer to the values to hash.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const int64_t* values, int num_values, uint64_t* hashes) const = 0;
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/// Batch compute hashes for float values by using its plain encoding result.
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///
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/// @param values a pointer to the values to hash.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const float* values, int num_values, uint64_t* hashes) const = 0;
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/// Batch compute hashes for double values by using its plain encoding result.
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///
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/// @param values a pointer to the values to hash.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const double* values, int num_values, uint64_t* hashes) const = 0;
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/// Batch compute hashes for Int96 values by using its plain encoding result.
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///
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/// @param values a pointer to the values to hash.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const Int96* values, int num_values, uint64_t* hashes) const = 0;
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/// Batch compute hashes for ByteArray values by using its plain encoding result.
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///
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/// @param values a pointer to the values to hash.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const ByteArray* values, int num_values,
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uint64_t* hashes) const = 0;
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/// Batch compute hashes for fixed byte array values by using its plain encoding result.
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///
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/// @param values the value address.
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/// @param type_len the value length.
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/// @param num_values the number of values to hash.
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/// @param hashes a pointer to the output hash values, its length should be equal to
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/// num_values.
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virtual void Hashes(const FLBA* values, uint32_t type_len, int num_values,
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uint64_t* hashes) const = 0;
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virtual ~Hasher() = default;
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};
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} // namespace parquet
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