forked from ethereum/solidity
-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathCommon.h
132 lines (109 loc) · 3.6 KB
/
Common.h
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
/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
/** @file Common.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*
* Very common stuff (i.e. that every other header needs except vector_ref.h).
*/
#pragma once
// way too many unsigned to size_t warnings in 32 bit build
#ifdef _M_IX86
#pragma warning(disable:4244)
#endif
#if _MSC_VER && _MSC_VER < 1900
#define _ALLOW_KEYWORD_MACROS
#define noexcept throw()
#endif
#ifdef __INTEL_COMPILER
#pragma warning(disable:3682) //call through incomplete class
#endif
#include <libsolutil/vector_ref.h>
#include <boost/version.hpp>
#if (BOOST_VERSION < 106500)
#error "Unsupported Boost version. At least 1.65 required."
#endif
#include <boost/multiprecision/cpp_int.hpp>
#include <map>
#include <utility>
#include <vector>
#include <functional>
#include <string>
namespace solidity
{
// Binary data types.
using bytes = std::vector<uint8_t>;
using bytesRef = util::vector_ref<uint8_t>;
using bytesConstRef = util::vector_ref<uint8_t const>;
// Numeric types.
using bigint = boost::multiprecision::number<boost::multiprecision::cpp_int_backend<>>;
using u256 = boost::multiprecision::number<boost::multiprecision::cpp_int_backend<256, 256, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>>;
using s256 = boost::multiprecision::number<boost::multiprecision::cpp_int_backend<256, 256, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, void>>;
using u160 = boost::multiprecision::number<boost::multiprecision::cpp_int_backend<160, 160, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>>;
// Map types.
using StringMap = std::map<std::string, std::string>;
// String types.
using strings = std::vector<std::string>;
/// Interprets @a _u as a two's complement signed number and returns the resulting s256.
inline s256 u2s(u256 _u)
{
static bigint const c_end = bigint(1) << 256;
if (boost::multiprecision::bit_test(_u, 255))
return s256(-(c_end - _u));
else
return s256(_u);
}
/// @returns the two's complement signed representation of the signed number _u.
inline u256 s2u(s256 _u)
{
static bigint const c_end = bigint(1) << 256;
if (_u >= 0)
return u256(_u);
else
return u256(c_end + _u);
}
inline u256 exp256(u256 _base, u256 _exponent)
{
using boost::multiprecision::limb_type;
u256 result = 1;
while (_exponent)
{
if (boost::multiprecision::bit_test(_exponent, 0))
result *= _base;
_base *= _base;
_exponent >>= 1;
}
return result;
}
inline std::ostream& operator<<(std::ostream& os, bytes const& _bytes)
{
std::ostringstream ss;
ss << std::hex;
std::copy(_bytes.begin(), _bytes.end(), std::ostream_iterator<int>(ss, ","));
std::string result = ss.str();
result.pop_back();
os << "[" + result + "]";
return os;
}
/// RAII utility class whose destructor calls a given function.
class ScopeGuard
{
public:
explicit ScopeGuard(std::function<void(void)> _f): m_f(std::move(_f)) {}
~ScopeGuard() { m_f(); }
private:
std::function<void(void)> m_f;
};
}