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
|
// Copyright (c) 2019-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_UTIL_STRING_H
#define BITCOIN_UTIL_STRING_H
#include <attributes.h>
#include <cstring>
#include <locale>
#include <sstream>
#include <string>
#include <vector>
NODISCARD inline std::string TrimString(const std::string& str, const std::string& pattern = " \f\n\r\t\v")
{
std::string::size_type front = str.find_first_not_of(pattern);
if (front == std::string::npos) {
return std::string();
}
std::string::size_type end = str.find_last_not_of(pattern);
return str.substr(front, end - front + 1);
}
/**
* Join a list of items
*
* @param list The list to join
* @param separator The separator
* @param unary_op Apply this operator to each item in the list
*/
template <typename T, typename BaseType, typename UnaryOp>
auto Join(const std::vector<T>& list, const BaseType& separator, UnaryOp unary_op)
-> decltype(unary_op(list.at(0)))
{
decltype(unary_op(list.at(0))) ret;
for (size_t i = 0; i < list.size(); ++i) {
if (i > 0) ret += separator;
ret += unary_op(list.at(i));
}
return ret;
}
template <typename T>
T Join(const std::vector<T>& list, const T& separator)
{
return Join(list, separator, [](const T& i) { return i; });
}
// Explicit overload needed for c_str arguments, which would otherwise cause a substitution failure in the template above.
inline std::string Join(const std::vector<std::string>& list, const std::string& separator)
{
return Join<std::string>(list, separator);
}
/**
* Check if a string does not contain any embedded NUL (\0) characters
*/
NODISCARD inline bool ValidAsCString(const std::string& str) noexcept
{
return str.size() == strlen(str.c_str());
}
/**
* Locale-independent version of std::to_string
*/
template <typename T>
std::string ToString(const T& t)
{
std::ostringstream oss;
oss.imbue(std::locale::classic());
oss << t;
return oss.str();
}
#endif // BITCOIN_UTIL_STRENCODINGS_H
|
