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63 lines
2.1 KiB
63 lines
2.1 KiB
7 months ago
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TC3_STD_STRING_IMPORT
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#define TC3_STD_STRING_IMPORT
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#include <string>
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namespace libtextclassifier3 {
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using string = std::string;
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template <class CharT, class Traits = std::char_traits<CharT>,
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class Allocator = std::allocator<CharT> >
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using basic_string = std::basic_string<CharT, Traits, Allocator>;
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} // namespace libtextclassifier3
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#endif
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#ifndef NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_HASH_H_
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#define NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_HASH_H_
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#include <string>
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#include "lang_id/common/lite_base/integral-types.h"
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namespace libtextclassifier3 {
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namespace mobile {
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namespace utils {
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// Returns a 32 bit hash of the |n| bytes that start at |data|, using |seed| for
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// internal initialization. By changing the seed, one effectively gets
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// different hash functions.
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//
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// NOTE: this function is guaranteed not to change in the future.
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//
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// IMPORTANT: for speed reasons, this method does not check its parameters
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// |data| and |n|. The caller should ensure that n >= 0 and that one can read
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// from the memory area [data, data + n).
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uint32 Hash32(const char *data, size_t n, uint32 seed);
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static inline uint32 Hash32WithDefaultSeed(const char *data, size_t n) {
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return Hash32(data, n, 0xBEEF);
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}
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static inline uint32 Hash32WithDefaultSeed(const std::string &input) {
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return Hash32WithDefaultSeed(input.data(), input.size());
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}
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} // namespace utils
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} // namespace mobile
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} // namespace nlp_saft
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#endif // NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_HASH_H_
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