1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// -*- C++ -*-
//===-------------------- constexpr_char_traits ---------------------------===//
//
// 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 _CONSTEXPR_CHAR_TRAITS
#define _CONSTEXPR_CHAR_TRAITS
#include <string>
#include <cassert>
#include "test_macros.h"
template <class _CharT>
struct constexpr_char_traits
{
typedef _CharT char_type;
typedef int int_type;
typedef std::streamoff off_type;
typedef std::streampos pos_type;
typedef std::mbstate_t state_type;
static TEST_CONSTEXPR_CXX14 void assign(char_type& __c1, const char_type& __c2) TEST_NOEXCEPT
{__c1 = __c2;}
static TEST_CONSTEXPR bool eq(char_type __c1, char_type __c2) TEST_NOEXCEPT
{return __c1 == __c2;}
static TEST_CONSTEXPR bool lt(char_type __c1, char_type __c2) TEST_NOEXCEPT
{return __c1 < __c2;}
static TEST_CONSTEXPR_CXX14 int compare(const char_type* __s1, const char_type* __s2, size_t __n);
static TEST_CONSTEXPR_CXX14 size_t length(const char_type* __s);
static TEST_CONSTEXPR_CXX14 const char_type* find(const char_type* __s, size_t __n, const char_type& __a);
static TEST_CONSTEXPR_CXX14 char_type* move(char_type* __s1, const char_type* __s2, size_t __n);
static TEST_CONSTEXPR_CXX14 char_type* copy(char_type* __s1, const char_type* __s2, size_t __n);
static TEST_CONSTEXPR_CXX14 char_type* assign(char_type* __s, size_t __n, char_type __a);
static TEST_CONSTEXPR int_type not_eof(int_type __c) TEST_NOEXCEPT
{return eq_int_type(__c, eof()) ? ~eof() : __c;}
static TEST_CONSTEXPR char_type to_char_type(int_type __c) TEST_NOEXCEPT
{return char_type(__c);}
static TEST_CONSTEXPR int_type to_int_type(char_type __c) TEST_NOEXCEPT
{return int_type(__c);}
static TEST_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) TEST_NOEXCEPT
{return __c1 == __c2;}
static TEST_CONSTEXPR int_type eof() TEST_NOEXCEPT
{return int_type(EOF);}
};
template <class _CharT>
TEST_CONSTEXPR_CXX14 int
constexpr_char_traits<_CharT>::compare(const char_type* __s1, const char_type* __s2, size_t __n)
{
for (; __n; --__n, ++__s1, ++__s2)
{
if (lt(*__s1, *__s2))
return -1;
if (lt(*__s2, *__s1))
return 1;
}
return 0;
}
template <class _CharT>
TEST_CONSTEXPR_CXX14 size_t
constexpr_char_traits<_CharT>::length(const char_type* __s)
{
size_t __len = 0;
for (; !eq(*__s, char_type(0)); ++__s)
++__len;
return __len;
}
template <class _CharT>
TEST_CONSTEXPR_CXX14 const _CharT*
constexpr_char_traits<_CharT>::find(const char_type* __s, size_t __n, const char_type& __a)
{
for (; __n; --__n)
{
if (eq(*__s, __a))
return __s;
++__s;
}
return 0;
}
template <class _CharT>
TEST_CONSTEXPR_CXX14 _CharT*
constexpr_char_traits<_CharT>::move(char_type* __s1, const char_type* __s2, size_t __n)
{
char_type* __r = __s1;
if (__s1 < __s2)
{
for (; __n; --__n, ++__s1, ++__s2)
assign(*__s1, *__s2);
}
else if (__s2 < __s1)
{
__s1 += __n;
__s2 += __n;
for (; __n; --__n)
assign(*--__s1, *--__s2);
}
return __r;
}
template <class _CharT>
TEST_CONSTEXPR_CXX14 _CharT*
constexpr_char_traits<_CharT>::copy(char_type* __s1, const char_type* __s2, size_t __n)
{
assert(__s2 < __s1 || __s2 >= __s1+__n);
char_type* __r = __s1;
for (; __n; --__n, ++__s1, ++__s2)
assign(*__s1, *__s2);
return __r;
}
template <class _CharT>
TEST_CONSTEXPR_CXX14 _CharT*
constexpr_char_traits<_CharT>::assign(char_type* __s, size_t __n, char_type __a)
{
char_type* __r = __s;
for (; __n; --__n, ++__s)
assign(*__s, __a);
return __r;
}
#endif // _CONSTEXPR_CHAR_TRAITS
|
