| // Copyright 2018 The Abseil Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "absl/time/civil_time.h" |
| |
| #include <cstdlib> |
| #include <string> |
| |
| #include "absl/strings/str_cat.h" |
| #include "absl/time/time.h" |
| |
| namespace absl { |
| |
| namespace { |
| |
| // Since a civil time has a larger year range than absl::Time (64-bit years vs |
| // 64-bit seconds, respectively) we normalize years to roughly +/- 400 years |
| // around the year 2400, which will produce an equivalent year in a range that |
| // absl::Time can handle. |
| inline civil_year_t NormalizeYear(civil_year_t year) { |
| return 2400 + year % 400; |
| } |
| |
| // Formats the given CivilSecond according to the given format. |
| std::string FormatYearAnd(string_view fmt, CivilSecond cs) { |
| const CivilSecond ncs(NormalizeYear(cs.year()), cs.month(), cs.day(), |
| cs.hour(), cs.minute(), cs.second()); |
| const TimeZone utc = UTCTimeZone(); |
| // TODO(absl-team): Avoid conversion of fmt std::string. |
| return StrCat(cs.year(), |
| FormatTime(std::string(fmt), FromCivil(ncs, utc), utc)); |
| } |
| |
| } // namespace |
| |
| std::string FormatCivilTime(CivilSecond c) { |
| return FormatYearAnd("-%m-%dT%H:%M:%S", c); |
| } |
| std::string FormatCivilTime(CivilMinute c) { |
| return FormatYearAnd("-%m-%dT%H:%M", c); |
| } |
| std::string FormatCivilTime(CivilHour c) { |
| return FormatYearAnd("-%m-%dT%H", c); |
| } |
| std::string FormatCivilTime(CivilDay c) { return FormatYearAnd("-%m-%d", c); } |
| std::string FormatCivilTime(CivilMonth c) { return FormatYearAnd("-%m", c); } |
| std::string FormatCivilTime(CivilYear c) { return FormatYearAnd("", c); } |
| |
| namespace time_internal { |
| |
| std::ostream& operator<<(std::ostream& os, CivilYear y) { |
| return os << FormatCivilTime(y); |
| } |
| std::ostream& operator<<(std::ostream& os, CivilMonth m) { |
| return os << FormatCivilTime(m); |
| } |
| std::ostream& operator<<(std::ostream& os, CivilDay d) { |
| return os << FormatCivilTime(d); |
| } |
| std::ostream& operator<<(std::ostream& os, CivilHour h) { |
| return os << FormatCivilTime(h); |
| } |
| std::ostream& operator<<(std::ostream& os, CivilMinute m) { |
| return os << FormatCivilTime(m); |
| } |
| std::ostream& operator<<(std::ostream& os, CivilSecond s) { |
| return os << FormatCivilTime(s); |
| } |
| |
| } // namespace time_internal |
| |
| } // namespace absl |