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Diffstat (limited to 'src/base/humanize.time.cc')
| -rw-r--r-- | src/base/humanize.time.cc | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/src/base/humanize.time.cc b/src/base/humanize.time.cc new file mode 100644 index 0000000..e9a35de --- /dev/null +++ b/src/base/humanize.time.cc @@ -0,0 +1,205 @@ +/** + * Copyright (c) 2021, Timothy Stack + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of Timothy Stack nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <chrono> + +#include "humanize.time.hh" + +#include "config.h" +#include "fmt/format.h" +#include "time_util.hh" + +namespace humanize { +namespace time { + +using namespace std::chrono_literals; + +point +point::from_tv(const timeval& tv) +{ + return point(tv); +} + +std::string +point::as_time_ago() const +{ + struct timeval current_time + = this->p_recent_point.value_or(current_timeval()); + + if (this->p_convert_to_local) { + current_time.tv_sec = convert_log_time_to_local(current_time.tv_sec); + } + + auto delta + = std::chrono::seconds(current_time.tv_sec - this->p_past_point.tv_sec); + if (delta < 0s) { + return "in the future"; + } + if (delta < 1min) { + return "just now"; + } + if (delta < 2min) { + return "one minute ago"; + } + if (delta < 1h) { + return fmt::format( + FMT_STRING("{} minutes ago"), + std::chrono::duration_cast<std::chrono::minutes>(delta).count()); + } + if (delta < 2h) { + return "one hour ago"; + } + if (delta < 24h) { + return fmt::format( + FMT_STRING("{} hours ago"), + std::chrono::duration_cast<std::chrono::hours>(delta).count()); + } + if (delta < 48h) { + return "one day ago"; + } + if (delta < 365 * 24h) { + return fmt::format(FMT_STRING("{} days ago"), delta / 24h); + } + if (delta < (2 * 365 * 24h)) { + return "over a year ago"; + } + return fmt::format(FMT_STRING("over {} years ago"), delta / (365 * 24h)); +} + +std::string +point::as_precise_time_ago() const +{ + struct timeval now, diff; + + now = this->p_recent_point.value_or(current_timeval()); + if (this->p_convert_to_local) { + now.tv_sec = convert_log_time_to_local(now.tv_sec); + } + + timersub(&now, &this->p_past_point, &diff); + if (diff.tv_sec < 0) { + return this->as_time_ago(); + } else if (diff.tv_sec <= 1) { + return "a second ago"; + } else if (diff.tv_sec < (10 * 60)) { + if (diff.tv_sec < 60) { + return fmt::format(FMT_STRING("{:2} seconds ago"), diff.tv_sec); + } + + time_t seconds = diff.tv_sec % 60; + time_t minutes = diff.tv_sec / 60; + + return fmt::format(FMT_STRING("{:2} minute{} and {:2} second{} ago"), + minutes, + minutes > 1 ? "s" : "", + seconds, + seconds == 1 ? "" : "s"); + } else { + return this->as_time_ago(); + } +} + +duration +duration::from_tv(const struct timeval& tv) +{ + return duration{tv}; +} + +std::string +duration::to_string() const +{ + /* 24h22m33s111 */ + + static const struct rel_interval { + uint64_t length; + const char* format; + const char* symbol; + } intervals[] = { + {1000, "%03lld%s", ""}, + {60, "%lld%s", "s"}, + {60, "%lld%s", "m"}, + {24, "%lld%s", "h"}, + {0, "%lld%s", "d"}, + }; + + const auto* curr_interval = intervals; + auto usecs = std::chrono::duration_cast<std::chrono::microseconds>( + std::chrono::seconds(this->d_timeval.tv_sec)) + + std::chrono::microseconds(this->d_timeval.tv_usec); + auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(usecs); + std::string retval; + bool neg = false; + + if (millis < 0s) { + neg = true; + millis = -millis; + } + + uint64_t remaining; + if (millis >= 10min) { + remaining + = std::chrono::duration_cast<std::chrono::seconds>(millis).count(); + curr_interval += 1; + } else { + remaining = millis.count(); + } + + for (; curr_interval != std::end(intervals); curr_interval++) { + uint64_t amount; + char segment[32]; + + if (curr_interval->length) { + amount = remaining % curr_interval->length; + remaining = remaining / curr_interval->length; + } else { + amount = remaining; + remaining = 0; + } + + if (!amount && !remaining) { + break; + } + + snprintf(segment, + sizeof(segment), + curr_interval->format, + amount, + curr_interval->symbol); + retval.insert(0, segment); + } + + if (neg) { + retval.insert(0, "-"); + } + + return retval; +} + +} // namespace time +} // namespace humanize |