test_util.cc
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1 // Copyright 2017 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
16 
17 #include <algorithm>
18 #include <cstddef>
19 #include <cstring>
20 
23 
25 
26 namespace absl {
27 namespace time_internal {
28 
29 TimeZone LoadTimeZone(const std::string& name) {
30  TimeZone tz;
31  ABSL_RAW_CHECK(LoadTimeZone(name, &tz), name.c_str());
32  return tz;
33 }
34 
35 } // namespace time_internal
36 } // namespace absl
37 
38 namespace absl {
39 namespace time_internal {
40 namespace cctz_extension {
41 namespace {
42 
43 // Embed the zoneinfo data for time zones used during tests and benchmarks.
44 // The data was generated using "xxd -i zoneinfo-file". There is no need
45 // to update the data as long as the tests do not depend on recent changes
46 // (and the past rules remain the same).
47 #include "absl/time/internal/zoneinfo.inc"
48 
49 const struct ZoneInfo {
50  const char* name;
51  const char* data;
52  std::size_t length;
53 } kZoneInfo[] = {
54  // The three real time zones used by :time_test and :time_benchmark.
55  {"America/Los_Angeles", //
56  reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
57  {"America/New_York", //
58  reinterpret_cast<char*>(America_New_York), America_New_York_len},
59  {"Australia/Sydney", //
60  reinterpret_cast<char*>(Australia_Sydney), Australia_Sydney_len},
61 
62  // Other zones named in tests but which should fail to load.
63  {"Invalid/TimeZone", nullptr, 0},
64  {"", nullptr, 0},
65 
66  // Also allow for loading the local time zone under TZ=US/Pacific.
67  {"US/Pacific", //
68  reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
69 
70  // Allows use of the local time zone from a system-specific location.
71 #ifdef _MSC_VER
72  {"localtime", //
73  reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
74 #else
75  {"/etc/localtime", //
76  reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
77 #endif
78 };
79 
80 class TestZoneInfoSource : public cctz::ZoneInfoSource {
81  public:
82  TestZoneInfoSource(const char* data, std::size_t size)
83  : data_(data), end_(data + size) {}
84 
85  std::size_t Read(void* ptr, std::size_t size) override {
86  const std::size_t len = std::min<std::size_t>(size, end_ - data_);
87  memcpy(ptr, data_, len);
88  data_ += len;
89  return len;
90  }
91 
92  int Skip(std::size_t offset) override {
93  data_ += std::min<std::size_t>(offset, end_ - data_);
94  return 0;
95  }
96 
97  private:
98  const char* data_;
99  const char* const end_;
100 };
101 
102 std::unique_ptr<cctz::ZoneInfoSource> TestFactory(
103  const std::string& name,
104  const std::function<std::unique_ptr<cctz::ZoneInfoSource>(
105  const std::string& name)>& /*fallback_factory*/) {
106  for (const ZoneInfo& zoneinfo : kZoneInfo) {
107  if (name == zoneinfo.name) {
108  if (zoneinfo.data == nullptr) return nullptr;
109  return std::unique_ptr<cctz::ZoneInfoSource>(
110  new TestZoneInfoSource(zoneinfo.data, zoneinfo.length));
111  }
112  }
113  ABSL_RAW_LOG(FATAL, "Unexpected time zone \"%s\" in test", name.c_str());
114  return nullptr;
115 }
116 
117 } // namespace
118 
120 
121 } // namespace cctz_extension
122 } // namespace time_internal
123 } // namespace absl
const char * data
Definition: test_util.cc:51
ZoneInfoSourceFactory zone_info_source_factory
#define ABSL_RAW_LOG(severity,...)
Definition: raw_logging.h:42
const char * name
Definition: test_util.cc:50
Definition: algorithm.h:29
#define ABSL_RAW_CHECK(condition, message)
Definition: raw_logging.h:57
const char * data_
Definition: test_util.cc:98
char * ptr
uintptr_t size
static PerThreadSynch * Skip(PerThreadSynch *x)
Definition: mutex.cc:817
TimeZone LoadTimeZone(const std::string &name)
Definition: test_util.cc:29
const char *const end_
Definition: test_util.cc:99
std::unique_ptr< absl::time_internal::cctz::ZoneInfoSource >(*)(const std::string &, const std::function< std::unique_ptr< absl::time_internal::cctz::ZoneInfoSource >(const std::string &)> &) ZoneInfoSourceFactory
std::size_t length
Definition: test_util.cc:52


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autogenerated on Mon Feb 28 2022 21:31:20