-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathcsprot.hpp
232 lines (191 loc) · 7.78 KB
/
csprot.hpp
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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
// Copyright (c) 2015-2023 niXman (i dot nixman dog gmail dot com). All
// rights reserved.
//
// This file is part of CSPROT(https://github.com/niXman/csprot) project.
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
//
//
// Boost Software License - Version 1.0 - August 17th, 2003
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#ifndef _csprot_hpp_
#define _csprot_hpp_
#include <cstdint>
#if __cplusplus < 201402L
# error C++14 or greater is required
#endif
namespace csprot {
/**************************************************************************/
namespace {
constexpr std::uint32_t fnv1a(const char *s, std::uint32_t h = 0x811c9dc5) {
return (*s == 0) ? h : fnv1a(s+1, ((h ^ (*s)) * 0x01000193));
}
} // anon ns
/**************************************************************************/
namespace {
// holder
template<bool, typename CharType, std::uint32_t XorVal, CharType FirstChar, CharType... SecondChars>
struct string_holder;
// spec for plain strings
template<typename CharType, std::uint32_t XorVal, CharType FirstChar, CharType... SecondChars>
struct string_holder<true, CharType, XorVal, FirstChar, SecondChars...> {
protected:
static constexpr CharType _data[] = { FirstChar, SecondChars..., '\0' };
constexpr const CharType* c_str() const { return _data; }
};
template <typename CharType, std::uint32_t XorVal, CharType FirstChar, CharType... SecondChars>
constexpr const CharType string_holder<true, CharType, XorVal, FirstChar, SecondChars...>::_data[];
// spec for xor`ed strings
template<typename CharType, std::uint32_t XorVal, CharType FirstChar, CharType... SecondChars>
struct string_holder<false, CharType, XorVal, FirstChar, SecondChars...> {
static constexpr CharType _data[] = { FirstChar^(char)(XorVal), SecondChars^(char)(XorVal) ..., '\0' };
mutable char _plain[sizeof(_data)];
constexpr const CharType* c_str() const {
std::size_t i = 0;
for ( ; i < 1+sizeof...(SecondChars); ++i ) {
_plain[i] = _data[i]^(char)(XorVal);
}
_plain[i]=0;
return _plain;
}
};
template <typename CharType, std::uint32_t XorVal, CharType FirstChar, CharType... SecondChars>
constexpr const CharType string_holder<false, CharType, XorVal, FirstChar, SecondChars...>::_data[];
} // anon ns
/**************************************************************************/
template<typename CharType, std::uint32_t XorVal, CharType... Chars>
class cstring;
template<
typename CharType
,std::uint32_t XorVal
,CharType FirstChar
,CharType... SecondChars
>
struct cstring<CharType, XorVal, FirstChar, SecondChars...>
:string_holder<XorVal==0, CharType, XorVal, FirstChar, SecondChars...> {
private:
using holder_type = string_holder<XorVal==0, CharType, XorVal, FirstChar, SecondChars...>;
public:
constexpr cstring() = default;
constexpr std::size_t size() const { return 1+sizeof...(SecondChars); }
constexpr std::size_t length() const { return size(); }
constexpr bool empty() const { return false; }
constexpr bool is_plain() const { return XorVal == 0; }
constexpr bool is_xored() const { return !is_plain(); }
constexpr const CharType* data() const { return holder_type::_data; }
using holder_type::c_str;
template<
std::uint32_t XorVal2
,CharType... Chars
>
constexpr int compare(const cstring<CharType, XorVal2, Chars...>& other) const {
for ( std::size_t i = 0; i < size() && i < other.size(); ++i ) {
if (data()[i] < other.data()[i]) return -1;
if (data()[i] > other.data()[i]) return 1;
}
if (size() < other.size()) return -1;
if (size() > other.size()) return 1;
return 0;
}
};
// spec for empty strings
template<typename CharType, std::uint32_t XorVal>
struct cstring<CharType, XorVal> {
private:
static constexpr CharType _data = '\0';
public:
constexpr cstring() = default;
constexpr std::size_t size() const { return 0; }
constexpr std::size_t length() const { return 0; }
constexpr bool empty() const { return true; }
constexpr bool is_plain() const { return XorVal == 0; }
constexpr bool is_xored() const { return !is_plain(); }
constexpr const CharType* data() const { return &_data; }
constexpr const CharType* c_str() const { return &_data; }
template <CharType... OtherChars>
constexpr int compare(const cstring<CharType, XorVal, OtherChars...>& other) const {
return other.empty() ? 0 : -1;
}
};
template<typename CharType, std::uint32_t XorVal>
constexpr const CharType cstring<CharType, XorVal>::_data;
/*****************************************************************************/
// for plain strings
template<typename CharType, CharType... Chars>
constexpr auto operator"" _S() {
return cstring<CharType, 0, Chars...>();
}
// for xor`ed strings
template<typename CharType, CharType... Chars>
constexpr auto operator"" _XS() {
return cstring<CharType, fnv1a(__DATE__ __TIME__), Chars...>();
}
#define _CSPROT_CAT2(x, y) x##y
#define _CSPROT_CAT(x, y) _CSPROT_CAT2(x, y)
#define csprot_plain_string(s) _CSPROT_CAT(s, _S)
#define csprot_xored_string(s) _CSPROT_CAT(s, _XS)
/**************************************************************************/
template<
typename CharType
,std::uint32_t XorVal
,CharType... LeftChars
,CharType... RightChars
>
constexpr auto operator+ (
const cstring<CharType, XorVal, LeftChars...> &
,const cstring<CharType, XorVal, RightChars...> &)
{
return cstring<CharType, XorVal, LeftChars..., RightChars...>();
}
template<
typename CharType
,std::uint32_t XorValLeft
,std::uint32_t XorValRight
,CharType... LeftChars
,CharType... RightChars
>
constexpr bool operator== (
const cstring<CharType, XorValLeft, LeftChars...>& lhs
,const cstring<CharType, XorValRight, RightChars...>& rhs)
{
return (lhs.compare(rhs) == 0);
}
template<
typename CharType
,std::uint32_t XorValLeft
,std::uint32_t XorValRight
,CharType... LeftChars
,CharType... RightChars
>
constexpr bool operator!= (
const cstring<CharType, XorValLeft, LeftChars...>& lhs
,const cstring<CharType, XorValRight, RightChars...>& rhs)
{
return !operator==(lhs, rhs);
}
/**************************************************************************/
} // ns csprot
#endif // _csprot_hpp_