/*
|
* Copyright (C) 2018 The Android Open Source Project
|
*
|
* Licensed 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.
|
*/
|
|
#ifndef TC3_STD_STRING_IMPORT
|
#define TC3_STD_STRING_IMPORT
|
#include <string>
|
|
namespace libtextclassifier3 {
|
using string = std::string;
|
template <class CharT, class Traits = std::char_traits<CharT>,
|
class Allocator = std::allocator<CharT> >
|
using basic_string = std::basic_string<CharT, Traits, Allocator>;
|
} // namespace libtextclassifier3
|
#endif
|
#ifndef NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_HASH_H_
|
#define NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_HASH_H_
|
|
#include <string>
|
|
#include "lang_id/common/lite_base/integral-types.h"
|
|
namespace libtextclassifier3 {
|
namespace mobile {
|
namespace utils {
|
|
// Returns a 32 bit hash of the |n| bytes that start at |data|, using |seed| for
|
// internal initialization. By changing the seed, one effectively gets
|
// different hash functions.
|
//
|
// NOTE: this function is guaranteed not to change in the future.
|
//
|
// IMPORTANT: for speed reasons, this method does not check its parameters
|
// |data| and |n|. The caller should ensure that n >= 0 and that one can read
|
// from the memory area [data, data + n).
|
uint32 Hash32(const char *data, size_t n, uint32 seed);
|
|
static inline uint32 Hash32WithDefaultSeed(const char *data, size_t n) {
|
return Hash32(data, n, 0xBEEF);
|
}
|
|
static inline uint32 Hash32WithDefaultSeed(const string &input) {
|
return Hash32WithDefaultSeed(input.data(), input.size());
|
}
|
|
} // namespace utils
|
} // namespace mobile
|
} // namespace nlp_saft
|
|
#endif // NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_HASH_H_
|
