fc8dc48020
git-subtree-dir: third_party/abseil_cpp git-subtree-mainline:ffb2ae54begit-subtree-split:768eb2ca28
130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/time/internal/test_util.h"
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#include <algorithm>
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#include <cstddef>
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#include <cstring>
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#include "absl/base/internal/raw_logging.h"
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#include "absl/time/internal/cctz/include/cctz/zone_info_source.h"
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namespace cctz = absl::time_internal::cctz;
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace time_internal {
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TimeZone LoadTimeZone(const std::string& name) {
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TimeZone tz;
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ABSL_RAW_CHECK(LoadTimeZone(name, &tz), name.c_str());
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return tz;
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}
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} // namespace time_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace time_internal {
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namespace cctz_extension {
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namespace {
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// Embed the zoneinfo data for time zones used during tests and benchmarks.
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// The data was generated using "xxd -i zoneinfo-file". There is no need
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// to update the data as long as the tests do not depend on recent changes
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// (and the past rules remain the same).
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#include "absl/time/internal/zoneinfo.inc"
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const struct ZoneInfo {
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const char* name;
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const char* data;
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std::size_t length;
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} kZoneInfo[] = {
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// The three real time zones used by :time_test and :time_benchmark.
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{"America/Los_Angeles", //
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reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
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{"America/New_York", //
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reinterpret_cast<char*>(America_New_York), America_New_York_len},
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{"Australia/Sydney", //
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reinterpret_cast<char*>(Australia_Sydney), Australia_Sydney_len},
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// Other zones named in tests but which should fail to load.
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{"Invalid/TimeZone", nullptr, 0},
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{"", nullptr, 0},
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// Also allow for loading the local time zone under TZ=US/Pacific.
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{"US/Pacific", //
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reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
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// Allows use of the local time zone from a system-specific location.
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#ifdef _MSC_VER
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{"localtime", //
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reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
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#else
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{"/etc/localtime", //
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reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
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#endif
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};
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class TestZoneInfoSource : public cctz::ZoneInfoSource {
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public:
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TestZoneInfoSource(const char* data, std::size_t size)
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: data_(data), end_(data + size) {}
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std::size_t Read(void* ptr, std::size_t size) override {
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const std::size_t len = std::min<std::size_t>(size, end_ - data_);
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memcpy(ptr, data_, len);
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data_ += len;
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return len;
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}
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int Skip(std::size_t offset) override {
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data_ += std::min<std::size_t>(offset, end_ - data_);
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return 0;
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}
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private:
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const char* data_;
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const char* const end_;
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};
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std::unique_ptr<cctz::ZoneInfoSource> TestFactory(
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const std::string& name,
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const std::function<std::unique_ptr<cctz::ZoneInfoSource>(
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const std::string& name)>& /*fallback_factory*/) {
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for (const ZoneInfo& zoneinfo : kZoneInfo) {
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if (name == zoneinfo.name) {
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if (zoneinfo.data == nullptr) return nullptr;
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return std::unique_ptr<cctz::ZoneInfoSource>(
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new TestZoneInfoSource(zoneinfo.data, zoneinfo.length));
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}
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}
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ABSL_RAW_LOG(FATAL, "Unexpected time zone \"%s\" in test", name.c_str());
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return nullptr;
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}
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} // namespace
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#if !defined(__MINGW32__)
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// MinGW does not support the weak symbol extension mechanism.
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ZoneInfoSourceFactory zone_info_source_factory = TestFactory;
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#endif
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} // namespace cctz_extension
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} // namespace time_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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