f340f773ed
-- 906c47420646d510edd2479d5542c56f5fa31b65 by CJ Johnson <johnsoncj@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 216573923 -- 74560d4afd2b605909e677c6fc3076049fb3010a by Eric Fiselier <ericwf@google.com>: Avoid -Wformat-pedantic in benchmark. PiperOrigin-RevId: 216523769 -- 9bcc9da8b03e6d1ea43ee78931256c5541cb9686 by Eric Fiselier <ericwf@google.com>: Delete unused CityHash functions. PiperOrigin-RevId: 216464492 -- a42563b394c89fbb4c55cb5a6a5edbf96d271eea by Abseil Team <absl-team@google.com>: Introduce new Abseil interfaces for converting between civil times and absolute times.s Deprecates absl::ConvertDateTime() and absl::FromDateTime(). PiperOrigin-RevId: 216424948 -- 088e11235124267517d7f137854fa5554679c24f by Eric Fiselier <ericwf@google.com>: Remove unneeded break statements in test. PiperOrigin-RevId: 216403321 GitOrigin-RevId: 906c47420646d510edd2479d5542c56f5fa31b65 Change-Id: Idb44420be623e369c66f5a9c92bdc9ab46d3ec92
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
// 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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