80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
// Copyright (C) 2018-2020 Intel Corporation
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
|
|
/**
|
|
* @file
|
|
*/
|
|
|
|
#pragma once
|
|
#include <algorithm>
|
|
#include <cctype>
|
|
#include <functional>
|
|
#include <map>
|
|
#include <set>
|
|
#include <unordered_map>
|
|
|
|
namespace InferenceEngine {
|
|
namespace details {
|
|
|
|
/**
|
|
* @brief Provides caseless comparison for STL algorithms
|
|
*
|
|
* @tparam Key type, usually std::string
|
|
*/
|
|
template <class Key>
|
|
class CaselessLess {
|
|
public:
|
|
bool operator()(const Key& a, const Key& b) const noexcept {
|
|
return std::lexicographical_compare(std::begin(a), std::end(a), std::begin(b), std::end(b),
|
|
[](const char& cha, const char& chb) {
|
|
return std::tolower(cha) < std::tolower(chb);
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* provides caseless eq for stl algorithms
|
|
* @tparam Key
|
|
*/
|
|
template <class Key>
|
|
class CaselessEq {
|
|
public:
|
|
bool operator()(const Key& a, const Key& b) const noexcept {
|
|
return a.size() == b.size() &&
|
|
std::equal(std::begin(a), std::end(a), std::begin(b), [](const char& cha, const char& chb) {
|
|
return std::tolower(cha) == std::tolower(chb);
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* To hash caseless
|
|
*/
|
|
template <class T>
|
|
class CaselessHash : public std::hash<T> {
|
|
public:
|
|
size_t operator()(T __val) const noexcept {
|
|
T lc;
|
|
std::transform(std::begin(__val), std::end(__val), std::back_inserter(lc), [](typename T::value_type ch) {
|
|
return std::tolower(ch);
|
|
});
|
|
return std::hash<T>()(lc);
|
|
}
|
|
};
|
|
|
|
template <class Key, class Value>
|
|
using caseless_unordered_map = std::unordered_map<Key, Value, CaselessHash<Key>, CaselessEq<Key>>;
|
|
|
|
template <class Key, class Value>
|
|
using caseless_unordered_multimap = std::unordered_multimap<Key, Value, CaselessHash<Key>, CaselessEq<Key>>;
|
|
|
|
template <class Key, class Value>
|
|
using caseless_map = std::map<Key, Value, CaselessLess<Key>>;
|
|
|
|
template <class Key>
|
|
using caseless_set = std::set<Key, CaselessLess<Key>>;
|
|
|
|
} // namespace details
|
|
} // namespace InferenceEngine
|