libcxx/include/ext/__hash

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_EXT_HASH
#define _LIBCPP_EXT_HASH

#pragma GCC system_header

#include <__config>
#include <cstring>
#include <stddef.h>
#include <string>

namespace __gnu_cxx {

template <typename _Tp>
struct hash {};

template <>
struct hash<const char*> : public std::__unary_function<const char*, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(const char* __c) const _NOEXCEPT {
    return std::__do_string_hash(__c, __c + strlen(__c));
  }
};

template <>
struct hash<char*> : public std::__unary_function<char*, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(char* __c) const _NOEXCEPT {
    return std::__do_string_hash<const char*>(__c, __c + strlen(__c));
  }
};

template <>
struct hash<char> : public std::__unary_function<char, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(char __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<signed char> : public std::__unary_function<signed char, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(signed char __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<unsigned char> : public std::__unary_function<unsigned char, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(unsigned char __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<short> : public std::__unary_function<short, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(short __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<unsigned short> : public std::__unary_function<unsigned short, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(unsigned short __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<int> : public std::__unary_function<int, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(int __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<unsigned int> : public std::__unary_function<unsigned int, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(unsigned int __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<long> : public std::__unary_function<long, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(long __c) const _NOEXCEPT { return __c; }
};

template <>
struct hash<unsigned long> : public std::__unary_function<unsigned long, size_t> {
  _LIBCPP_HIDE_FROM_ABI size_t operator()(unsigned long __c) const _NOEXCEPT { return __c; }
};
} // namespace __gnu_cxx

#endif // _LIBCPP_EXT_HASH