mirror of
https://github.com/Detanup01/gbe_fork.git
synced 2024-12-27 10:54:15 +08:00
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/*
|
|
* Copyright (C) Nemirtingas
|
|
* This file is part of System.
|
|
*
|
|
* System is free software; you can redistribute it
|
|
* and/or modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* System is distributed in the hope that it will be
|
|
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with System; if not, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <string>
|
|
|
|
#include "SystemDetector.h"
|
|
#include "StringView.hpp"
|
|
|
|
namespace System {
|
|
|
|
namespace StringSwitch {
|
|
|
|
#if defined(SYSTEM_ARCH_X86)
|
|
using hash_type = uint32_t;
|
|
#else
|
|
using hash_type = uint64_t;
|
|
#endif
|
|
|
|
namespace Detail {
|
|
constexpr char lower_char(char c) { return ((c >= 'A' && c <= 'Z') ? c + 32 : c); }
|
|
}
|
|
|
|
// switch case on a string
|
|
constexpr hash_type Hash(const char* input, size_t len) { return (len > 0 ? static_cast<hash_type>(*input) + 33 * Hash(input + 1, len - 1) : 5381); }
|
|
|
|
template<size_t N>
|
|
constexpr hash_type Hash(const char(&input)[N]) { return Hash(input, N-1); }
|
|
|
|
constexpr hash_type Hash(System::StringView sv) { return Hash(sv.data(), sv.length()); }
|
|
|
|
inline hash_type Hash(const std::string& input) { return Hash(input.c_str(), input.length()); }
|
|
|
|
|
|
|
|
constexpr hash_type IHash(const char* input, size_t len) { return (len > 0 ? static_cast<hash_type>(Detail::lower_char(*input)) + 33 * IHash(input + 1, len - 1) : 5381); }
|
|
|
|
template<size_t N>
|
|
constexpr inline hash_type IHash(const char(&input)[N]) { return IHash(input, N - 1); }
|
|
|
|
constexpr hash_type IHash(System::StringView sv) { return IHash(sv.data(), sv.length()); }
|
|
|
|
inline hash_type IHash(const std::string& input) { return IHash(input.c_str(), input.length()); }
|
|
|
|
}
|
|
}
|