Abseil Common Libraries (C++) (grcp 依赖)
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88 lines
2.7 KiB
88 lines
2.7 KiB
// Copyright 2018 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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// http://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/civil_time.h" |
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#include <cstdlib> |
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#include <string> |
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#include "absl/strings/str_cat.h" |
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#include "absl/time/time.h" |
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namespace absl { |
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namespace { |
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// Since a civil time has a larger year range than absl::Time (64-bit years vs |
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// 64-bit seconds, respectively) we normalize years to roughly +/- 400 years |
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// around the year 2400, which will produce an equivalent year in a range that |
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// absl::Time can handle. |
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inline civil_year_t NormalizeYear(civil_year_t year) { |
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return 2400 + year % 400; |
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} |
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// Formats the given CivilSecond according to the given format. |
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std::string FormatYearAnd(string_view fmt, CivilSecond cs) { |
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const CivilSecond ncs(NormalizeYear(cs.year()), cs.month(), cs.day(), |
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cs.hour(), cs.minute(), cs.second()); |
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const TimeZone utc = UTCTimeZone(); |
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// TODO(absl-team): Avoid conversion of fmt std::string. |
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return StrCat(cs.year(), FormatTime(std::string(fmt), FromCivil(ncs, utc), utc)); |
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} |
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} // namespace |
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std::string FormatCivilTime(CivilSecond c) { |
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return FormatYearAnd("-%m-%dT%H:%M:%S", c); |
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} |
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std::string FormatCivilTime(CivilMinute c) { |
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return FormatYearAnd("-%m-%dT%H:%M", c); |
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} |
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std::string FormatCivilTime(CivilHour c) { |
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return FormatYearAnd("-%m-%dT%H", c); |
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} |
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std::string FormatCivilTime(CivilDay c) { |
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return FormatYearAnd("-%m-%d", c); |
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} |
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std::string FormatCivilTime(CivilMonth c) { |
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return FormatYearAnd("-%m", c); |
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} |
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std::string FormatCivilTime(CivilYear c) { |
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return FormatYearAnd("", c); |
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} |
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namespace time_internal { |
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std::ostream& operator<<(std::ostream& os, CivilYear y) { |
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return os << FormatCivilTime(y); |
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} |
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std::ostream& operator<<(std::ostream& os, CivilMonth m) { |
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return os << FormatCivilTime(m); |
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} |
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std::ostream& operator<<(std::ostream& os, CivilDay d) { |
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return os << FormatCivilTime(d); |
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} |
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std::ostream& operator<<(std::ostream& os, CivilHour h) { |
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return os << FormatCivilTime(h); |
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} |
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std::ostream& operator<<(std::ostream& os, CivilMinute m) { |
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return os << FormatCivilTime(m); |
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} |
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std::ostream& operator<<(std::ostream& os, CivilSecond s) { |
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return os << FormatCivilTime(s); |
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} |
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} // namespace time_internal |
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} // namespace absl
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