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/*
* Frozen
* Copyright 2016 QuarksLab
*
* 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.
*/
#ifndef FROZEN_LETITGO_STRING_H
#define FROZEN_LETITGO_STRING_H
#include "frozen/bits/elsa.h"
#include "frozen/bits/hash_string.h"
#include "frozen/bits/version.h"
#include "frozen/bits/defines.h"
#include <functional>
#ifdef FROZEN_LETITGO_HAS_STRING_VIEW
#include <string_view>
#endif
namespace frozen {
template <typename _CharT>
class basic_string {
using chr_t = _CharT;
chr_t const *data_;
std::size_t size_;
public:
template <std::size_t N>
constexpr basic_string(chr_t const (&data)[N])
: data_(data), size_(N - 1) {}
constexpr basic_string(chr_t const *data, std::size_t size)
: data_(data), size_(size) {}
#ifdef FROZEN_LETITGO_HAS_STRING_VIEW
constexpr basic_string(std::basic_string_view<chr_t> data)
: data_(data.data()), size_(data.size()) {}
#endif
constexpr basic_string(const basic_string &) noexcept = default;
constexpr basic_string &operator=(const basic_string &) noexcept = default;
constexpr std::size_t size() const { return size_; }
constexpr chr_t operator[](std::size_t i) const { return data_[i]; }
constexpr bool operator==(basic_string other) const {
if (size_ != other.size_)
return false;
for (std::size_t i = 0; i < size_; ++i)
if (data_[i] != other.data_[i])
return false;
return true;
}
constexpr bool operator<(const basic_string &other) const {
unsigned i = 0;
while (i < size() && i < other.size()) {
if ((*this)[i] < other[i]) {
return true;
}
if ((*this)[i] > other[i]) {
return false;
}
++i;
}
return size() < other.size();
}
constexpr const chr_t *data() const { return data_; }
constexpr const chr_t *begin() const { return data(); }
constexpr const chr_t *end() const { return data() + size(); }
};
template <typename _CharT> struct elsa<basic_string<_CharT>> {
constexpr std::size_t operator()(basic_string<_CharT> value) const {
return hash_string(value);
}
constexpr std::size_t operator()(basic_string<_CharT> value, std::size_t seed) const {
return hash_string(value, seed);
}
};
using string = basic_string<char>;
using wstring = basic_string<wchar_t>;
using u16string = basic_string<char16_t>;
using u32string = basic_string<char32_t>;
#ifdef FROZEN_LETITGO_HAS_CHAR8T
using u8string = basic_string<char8_t>;
#endif
namespace string_literals {
constexpr string operator"" _s(const char *data, std::size_t size) {
return {data, size};
}
constexpr wstring operator"" _s(const wchar_t *data, std::size_t size) {
return {data, size};
}
constexpr u16string operator"" _s(const char16_t *data, std::size_t size) {
return {data, size};
}
constexpr u32string operator"" _s(const char32_t *data, std::size_t size) {
return {data, size};
}
#ifdef FROZEN_LETITGO_HAS_CHAR8T
constexpr u8string operator"" _s(const char8_t *data, std::size_t size) {
return {data, size};
}
#endif
} // namespace string_literals
} // namespace frozen
namespace std {
template <typename _CharT> struct hash<frozen::basic_string<_CharT>> {
size_t operator()(frozen::basic_string<_CharT> s) const {
return frozen::elsa<frozen::basic_string<_CharT>>{}(s);
}
};
} // namespace std
#endif
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