1// -*- C++ -*-
2//===------------------------- hash_set ------------------------------------===//
3//
4//                     The LLVM Compiler Infrastructure
5//
6// This file is dual licensed under the MIT and the University of Illinois Open
7// Source Licenses. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10
11#ifndef _LIBCPP_EXT_HASH
12#define _LIBCPP_EXT_HASH
13
14#pragma GCC system_header
15
16#include <string>
17#include <cstring>
18
19namespace __gnu_cxx {
20using namespace std;
21
22template <typename _Tp> struct _LIBCPP_TYPE_VIS_ONLY hash : public std::hash<_Tp>
23    { };
24
25template <> struct _LIBCPP_TYPE_VIS_ONLY hash<const char*>
26    : public unary_function<const char*, size_t>
27{
28    _LIBCPP_INLINE_VISIBILITY
29    size_t operator()(const char *__c) const _NOEXCEPT
30    {
31        return __do_string_hash(__c, __c + strlen(__c));
32    }
33};
34
35template <> struct _LIBCPP_TYPE_VIS_ONLY hash<char *>
36    : public unary_function<char*, size_t>
37{
38    _LIBCPP_INLINE_VISIBILITY
39    size_t operator()(char *__c) const _NOEXCEPT
40    {
41        return __do_string_hash<const char *>(__c, __c + strlen(__c));
42    }
43};
44}
45
46#endif  // _LIBCPP_EXT_HASH
47