fmt_helper.h
3.01 KB
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
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
#pragma once
#include <chrono>
#include <type_traits>
#include <spdlog/fmt/fmt.h>
#include <spdlog/common.h>
// Some fmt helpers to efficiently format and pad ints and strings
namespace spdlog {
namespace details {
namespace fmt_helper {
inline spdlog::string_view_t to_string_view(const memory_buf_t &buf) SPDLOG_NOEXCEPT
{
return spdlog::string_view_t{buf.data(), buf.size()};
}
inline void append_string_view(spdlog::string_view_t view, memory_buf_t &dest)
{
auto *buf_ptr = view.data();
dest.append(buf_ptr, buf_ptr + view.size());
}
template<typename T>
inline void append_int(T n, memory_buf_t &dest)
{
fmt::format_int i(n);
dest.append(i.data(), i.data() + i.size());
}
template<typename T>
inline unsigned int count_digits(T n)
{
using count_type = typename std::conditional<(sizeof(T) > sizeof(uint32_t)), uint64_t, uint32_t>::type;
return static_cast<unsigned int>(fmt::
// fmt 7.0.0 renamed the internal namespace to detail.
// See: https://github.com/fmtlib/fmt/issues/1538
#if FMT_VERSION < 70000
internal
#else
detail
#endif
::count_digits(static_cast<count_type>(n)));
}
inline void pad2(int n, memory_buf_t &dest)
{
if (n >= 0 && n < 100) // 0-99
{
dest.push_back(static_cast<char>('0' + n / 10));
dest.push_back(static_cast<char>('0' + n % 10));
}
else // unlikely, but just in case, let fmt deal with it
{
fmt::format_to(dest, "{:02}", n);
}
}
template<typename T>
inline void pad_uint(T n, unsigned int width, memory_buf_t &dest)
{
static_assert(std::is_unsigned<T>::value, "pad_uint must get unsigned T");
for (auto digits = count_digits(n); digits < width; digits++)
{
dest.push_back('0');
}
append_int(n, dest);
}
template<typename T>
inline void pad3(T n, memory_buf_t &dest)
{
static_assert(std::is_unsigned<T>::value, "pad3 must get unsigned T");
if (n < 1000)
{
dest.push_back(static_cast<char>(n / 100 + '0'));
n = n % 100;
dest.push_back(static_cast<char>((n / 10) + '0'));
dest.push_back(static_cast<char>((n % 10) + '0'));
}
else
{
append_int(n, dest);
}
}
template<typename T>
inline void pad6(T n, memory_buf_t &dest)
{
pad_uint(n, 6, dest);
}
template<typename T>
inline void pad9(T n, memory_buf_t &dest)
{
pad_uint(n, 9, dest);
}
// return fraction of a second of the given time_point.
// e.g.
// fraction<std::milliseconds>(tp) -> will return the millis part of the second
template<typename ToDuration>
inline ToDuration time_fraction(log_clock::time_point tp)
{
using std::chrono::duration_cast;
using std::chrono::seconds;
auto duration = tp.time_since_epoch();
auto secs = duration_cast<seconds>(duration);
return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs);
}
} // namespace fmt_helper
} // namespace details
} // namespace spdlog