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
|
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#if !defined(_WIN32) && !defined(__sun)
// POSIX APIs are needed
// NOLINTNEXTLINE(bugprone-reserved-identifier)
# define _POSIX_C_SOURCE 200809L
#endif
#if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__) || \
defined(__QNX__)
// For isascii
// NOLINTNEXTLINE(bugprone-reserved-identifier)
# define _XOPEN_SOURCE 700
#endif
#include "cmTimestamp.h"
#include <cstdlib>
#include <cstring>
#include <sstream>
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
std::string cmTimestamp::CurrentTime(const std::string& formatString,
bool utcFlag) const
{
time_t currentTimeT = time(nullptr);
std::string source_date_epoch;
cmSystemTools::GetEnv("SOURCE_DATE_EPOCH", source_date_epoch);
if (!source_date_epoch.empty()) {
std::istringstream iss(source_date_epoch);
iss >> currentTimeT;
if (iss.fail() || !iss.eof()) {
cmSystemTools::Error("Cannot parse SOURCE_DATE_EPOCH as integer");
exit(27);
}
}
if (currentTimeT == time_t(-1)) {
return std::string();
}
return this->CreateTimestampFromTimeT(currentTimeT, formatString, utcFlag);
}
std::string cmTimestamp::FileModificationTime(const char* path,
const std::string& formatString,
bool utcFlag) const
{
std::string real_path =
cmSystemTools::GetRealPathResolvingWindowsSubst(path);
if (!cmsys::SystemTools::FileExists(real_path)) {
return std::string();
}
time_t mtime = cmsys::SystemTools::ModifiedTime(real_path);
return this->CreateTimestampFromTimeT(mtime, formatString, utcFlag);
}
std::string cmTimestamp::CreateTimestampFromTimeT(time_t timeT,
std::string formatString,
bool utcFlag) const
{
if (formatString.empty()) {
formatString = "%Y-%m-%dT%H:%M:%S";
if (utcFlag) {
formatString += "Z";
}
}
struct tm timeStruct;
memset(&timeStruct, 0, sizeof(timeStruct));
struct tm* ptr = nullptr;
if (utcFlag) {
ptr = gmtime(&timeT);
} else {
ptr = localtime(&timeT);
}
if (ptr == nullptr) {
return std::string();
}
timeStruct = *ptr;
std::string result;
for (std::string::size_type i = 0; i < formatString.size(); ++i) {
char c1 = formatString[i];
char c2 = (i + 1 < formatString.size()) ? formatString[i + 1]
: static_cast<char>(0);
if (c1 == '%' && c2 != 0) {
result += this->AddTimestampComponent(c2, timeStruct, timeT);
++i;
} else {
result += c1;
}
}
return result;
}
time_t cmTimestamp::CreateUtcTimeTFromTm(struct tm& tm) const
{
#if defined(_MSC_VER) && _MSC_VER >= 1400
return _mkgmtime(&tm);
#else
// From Linux timegm() manpage.
std::string tz_old;
bool const tz_was_set = cmSystemTools::GetEnv("TZ", tz_old);
tz_old = "TZ=" + tz_old;
// The standard says that "TZ=" or "TZ=[UNRECOGNIZED_TZ]" means UTC.
// It seems that "TZ=" does NOT work, at least under Windows
// with neither MSVC nor MinGW, so let's use explicit "TZ=UTC"
cmSystemTools::PutEnv("TZ=UTC");
tzset();
time_t result = mktime(&tm);
# ifndef CMAKE_BOOTSTRAP
if (tz_was_set) {
cmSystemTools::PutEnv(tz_old);
} else {
cmSystemTools::UnsetEnv("TZ");
}
# else
// No UnsetEnv during bootstrap. This is good enough for CMake itself.
cmSystemTools::PutEnv(tz_old);
static_cast<void>(tz_was_set);
# endif
tzset();
return result;
#endif
}
std::string cmTimestamp::AddTimestampComponent(char flag,
struct tm& timeStruct,
const time_t timeT) const
{
std::string formatString = cmStrCat('%', flag);
switch (flag) {
case 'a':
case 'A':
case 'b':
case 'B':
case 'd':
case 'H':
case 'I':
case 'j':
case 'm':
case 'M':
case 'S':
case 'U':
case 'w':
case 'y':
case 'Y':
case '%':
break;
case 's': // Seconds since UNIX epoch (midnight 1-jan-1970)
{
// Build a time_t for UNIX epoch and subtract from the input "timeT":
struct tm tmUnixEpoch;
memset(&tmUnixEpoch, 0, sizeof(tmUnixEpoch));
tmUnixEpoch.tm_mday = 1;
tmUnixEpoch.tm_year = 1970 - 1900;
const time_t unixEpoch = this->CreateUtcTimeTFromTm(tmUnixEpoch);
if (unixEpoch == -1) {
cmSystemTools::Error(
"Error generating UNIX epoch in "
"STRING(TIMESTAMP ...). Please, file a bug report against CMake");
return std::string();
}
return std::to_string(static_cast<long int>(difftime(timeT, unixEpoch)));
}
default: {
return formatString;
}
}
char buffer[16];
size_t size =
strftime(buffer, sizeof(buffer), formatString.c_str(), &timeStruct);
return std::string(buffer, size);
}
|
