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+/**
+ * Copyright (c) 2015, 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 <unordered_set>
+
+#include "relative_time.hh"
+
+#include "base/time_util.hh"
+#include "config.h"
+#include "pcrepp/pcre2pp.hh"
+#include "scn/scn.h"
+
+using namespace std::chrono_literals;
+
+static const struct {
+ const char* name;
+ lnav::pcre2pp::code pcre;
+} MATCHERS[relative_time::RTT__MAX] = {
+ {
+ "ws",
+ lnav::pcre2pp::code::from_const("\\A\\s+\\b"),
+ },
+ {
+ "am",
+ lnav::pcre2pp::code::from_const("\\Aam|a\\.m\\.\\b"),
+ },
+ {
+ "pm",
+ lnav::pcre2pp::code::from_const("\\Apm|p\\.m\\.\\b"),
+ },
+ {
+ "a",
+ lnav::pcre2pp::code::from_const("\\Aa\\b"),
+ },
+ {
+ "an",
+ lnav::pcre2pp::code::from_const("\\Aan\\b"),
+ },
+ {
+ "at",
+ lnav::pcre2pp::code::from_const("\\Aat\\b"),
+ },
+ {
+ "time",
+ lnav::pcre2pp::code::from_const(
+ "\\A(\\d{1,2}):(\\d{2})(?::(\\d{2})(?:\\.(\\d{3,6}))?)?"),
+ },
+ {
+ "num",
+ lnav::pcre2pp::code::from_const("\\A((?:-|\\+)?\\d+)"),
+ },
+
+ {
+ "sun",
+ lnav::pcre2pp::code::from_const("\\Asun(days?)?\\b"),
+ },
+ {
+ "mon",
+ lnav::pcre2pp::code::from_const("\\Amon(days?)?\\b"),
+ },
+ {
+ "tue",
+ lnav::pcre2pp::code::from_const("\\Atue(s(days?)?)?\\b"),
+ },
+ {
+ "wed",
+ lnav::pcre2pp::code::from_const("\\Awed(nesdays?)?\\b"),
+ },
+ {
+ "thu",
+ lnav::pcre2pp::code::from_const("\\Athu(rsdays?)?\\b"),
+ },
+ {
+ "fri",
+ lnav::pcre2pp::code::from_const("\\Afri(days?)?\\b"),
+ },
+ {
+ "sat",
+ lnav::pcre2pp::code::from_const("\\Asat(urdays?)?\\b"),
+ },
+
+ {
+ "us",
+ lnav::pcre2pp::code::from_const(
+ "\\A(?:micros(?:econds?)?|us(?![a-zA-Z]))"),
+ },
+ {
+ "ms",
+ lnav::pcre2pp::code::from_const(
+ "\\A(?:millis(?:econds?)?|ms(?![a-zA-Z]))"),
+ },
+ {
+ "sec",
+ lnav::pcre2pp::code::from_const("\\As(?:ec(?:onds?)?)?(?![a-zA-Z])"),
+ },
+ {
+ "min",
+ lnav::pcre2pp::code::from_const("\\Am(?:in(?:utes?)?)?(?![a-zA-Z])"),
+ },
+ {
+ "h",
+ lnav::pcre2pp::code::from_const("\\Ah(?:ours?)?(?![a-zA-Z])"),
+ },
+ {
+ "day",
+ lnav::pcre2pp::code::from_const("\\Ad(?:ays?)?(?![a-zA-Z])"),
+ },
+ {
+ "week",
+ lnav::pcre2pp::code::from_const("\\Aw(?:eeks?)?(?![a-zA-Z])"),
+ },
+ {
+ "mon",
+ lnav::pcre2pp::code::from_const("\\Amon(?:ths?)?(?![a-zA-Z])"),
+ },
+ {
+ "year",
+ lnav::pcre2pp::code::from_const("\\Ay(?:ears?)?(?![a-zA-Z])"),
+ },
+ {
+ "today",
+ lnav::pcre2pp::code::from_const("\\Atoday\\b"),
+ },
+ {
+ "yest",
+ lnav::pcre2pp::code::from_const("\\Ayesterday\\b"),
+ },
+ {
+ "tomo",
+ lnav::pcre2pp::code::from_const("\\Atomorrow\\b"),
+ },
+ {
+ "noon",
+ lnav::pcre2pp::code::from_const("\\Anoon\\b"),
+ },
+ {
+ "and",
+ lnav::pcre2pp::code::from_const("\\Aand\\b"),
+ },
+ {
+ "the",
+ lnav::pcre2pp::code::from_const("\\Athe\\b"),
+ },
+ {
+ "ago",
+ lnav::pcre2pp::code::from_const("\\Aago\\b"),
+ },
+ {
+ "lter",
+ lnav::pcre2pp::code::from_const("\\Alater\\b"),
+ },
+ {
+ "bfor",
+ lnav::pcre2pp::code::from_const("\\Abefore\\b"),
+ },
+ {
+ "aft",
+ lnav::pcre2pp::code::from_const("\\Aafter\\b"),
+ },
+ {
+ "now",
+ lnav::pcre2pp::code::from_const("\\Anow\\b"),
+ },
+ {
+ "here",
+ lnav::pcre2pp::code::from_const("\\Ahere\\b"),
+ },
+ {
+ "next",
+ lnav::pcre2pp::code::from_const("\\Anext\\b"),
+ },
+ {
+ "previous",
+ lnav::pcre2pp::code::from_const("\\A(?:previous\\b|last\\b)"),
+ },
+};
+
+static int64_t TIME_SCALES[] = {
+ 1000 * 1000,
+ 60,
+ 60,
+ 24,
+};
+
+const char relative_time::FIELD_CHARS[] = {
+ 'u',
+ 's',
+ 'm',
+ 'h',
+ 'd',
+ 'M',
+ 'y',
+};
+
+Result<relative_time, relative_time::parse_error>
+relative_time::from_str(string_fragment str)
+{
+ int64_t number = 0;
+ bool number_set = false, number_was_set = false;
+ bool next_set = false;
+ token_t base_token = RTT_INVALID;
+ rt_field_type last_field_type = RTF__MAX;
+ relative_time retval;
+ parse_error pe_out;
+ std::unordered_set<int> seen_tokens;
+
+ pe_out.pe_column = 0;
+ pe_out.pe_msg.clear();
+
+ auto remaining = str;
+ while (true) {
+ rt_field_type curr_field_type = RTF__MAX;
+
+ if (remaining.empty()) {
+ if (number_set) {
+ if (number > 1970 && number < 2050) {
+ retval.rt_field[RTF_YEARS] = number - 1900;
+ retval.rt_absolute_field_end = RTF__MAX;
+
+ switch (base_token) {
+ case RTT_BEFORE: {
+ auto epoch = retval.to_timeval();
+ retval.rt_duration
+ = std::chrono::duration_cast<
+ std::chrono::microseconds>(
+ std::chrono::seconds(epoch.tv_sec))
+ + std::chrono::microseconds(epoch.tv_usec);
+ retval.rt_field[RTF_YEARS] = 70;
+ break;
+ }
+ case RTT_AFTER:
+ retval.rt_duration = std::chrono::duration_cast<
+ std::chrono::microseconds>(
+ std::chrono::hours(24 * 365 * 200));
+ break;
+ default:
+ break;
+ }
+ return Ok(retval);
+ }
+
+ pe_out.pe_msg = "Number given without a time unit";
+ return Err(pe_out);
+ }
+
+ if (base_token != RTT_INVALID) {
+ switch (base_token) {
+ case RTT_BEFORE:
+ pe_out.pe_msg
+ = "'before' requires a point in time (e.g. before "
+ "10am)";
+ break;
+ case RTT_AFTER:
+ pe_out.pe_msg
+ = "'after' requires a point in time (e.g. after "
+ "10am)";
+ break;
+ default:
+ ensure(false);
+ break;
+ }
+ return Err(pe_out);
+ }
+
+ retval.rollover();
+ return Ok(retval);
+ }
+
+ bool found = false;
+ for (int lpc = 0; lpc < RTT__MAX && !found; lpc++) {
+ static thread_local auto md = lnav::pcre2pp::match_data::unitialized();
+
+ token_t token = (token_t) lpc;
+ auto match_res = MATCHERS[lpc]
+ .pcre.capture_from(remaining)
+ .into(md)
+ .matches()
+ .ignore_error();
+ if (!match_res) {
+ continue;
+ }
+
+ remaining = match_res->f_remaining;
+ pe_out.pe_column = match_res->f_all.sf_begin;
+ found = true;
+ if (RTT_MICROS <= token && token <= RTT_YEARS) {
+ if (!number_set) {
+ if (base_token != RTT_INVALID) {
+ base_token = RTT_INVALID;
+ retval.rt_absolute_field_end = RTF__MAX;
+ continue;
+ }
+ if (!retval.rt_next && !retval.rt_previous) {
+ pe_out.pe_msg = "Expecting a number before time unit";
+ return Err(pe_out);
+ }
+ }
+ number_was_set = number_set;
+ number_set = false;
+ }
+ switch (token) {
+ case RTT_YESTERDAY:
+ case RTT_TODAY:
+ case RTT_NOW: {
+ if (seen_tokens.count(token) > 0) {
+ pe_out.pe_msg
+ = "Current time reference has already been used";
+ return Err(pe_out);
+ }
+
+ seen_tokens.insert(RTT_YESTERDAY);
+ seen_tokens.insert(RTT_TODAY);
+ seen_tokens.insert(RTT_NOW);
+
+ struct timeval tv;
+ struct exttm tm;
+
+ gettimeofday(&tv, nullptr);
+ localtime_r(&tv.tv_sec, &tm.et_tm);
+ tm.et_nsec = tv.tv_usec * 1000;
+ tm = retval.adjust(tm);
+
+ retval.rt_field[RTF_YEARS] = tm.et_tm.tm_year;
+ retval.rt_field[RTF_MONTHS] = tm.et_tm.tm_mon;
+ retval.rt_field[RTF_DAYS] = tm.et_tm.tm_mday;
+ switch (token) {
+ case RTT_NOW:
+ retval.rt_field[RTF_HOURS] = tm.et_tm.tm_hour;
+ retval.rt_field[RTF_MINUTES] = tm.et_tm.tm_min;
+ retval.rt_field[RTF_SECONDS] = tm.et_tm.tm_sec;
+ retval.rt_field[RTF_MICROSECONDS]
+ = tm.et_nsec / 1000;
+ break;
+ case RTT_YESTERDAY:
+ retval.rt_field[RTF_DAYS].value -= 1;
+ case RTT_TODAY:
+ retval.rt_field[RTF_HOURS] = 0;
+ retval.rt_field[RTF_MINUTES] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ break;
+ default:
+ break;
+ }
+ retval.rt_absolute_field_end = RTF__MAX;
+ break;
+ }
+ case RTT_INVALID:
+ case RTT_WHITE:
+ case RTT_AND:
+ case RTT_THE:
+ curr_field_type = last_field_type;
+ break;
+ case RTT_AM:
+ case RTT_PM:
+ if (seen_tokens.count(token) > 0) {
+ pe_out.pe_msg = "Time has already been set";
+ return Err(pe_out);
+ }
+ seen_tokens.insert(RTT_AM);
+ seen_tokens.insert(RTT_PM);
+ if (number_set) {
+ retval.rt_field[RTF_HOURS] = number;
+ retval.rt_field[RTF_MINUTES] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_duration = 1min;
+ retval.rt_absolute_field_end = RTF__MAX;
+ number_set = false;
+ }
+ if (!retval.is_absolute(RTF_YEARS)) {
+ pe_out.pe_msg
+ = "Expecting absolute time with A.M. or P.M.";
+ return Err(pe_out);
+ }
+ if (token == RTT_AM) {
+ if (retval.rt_field[RTF_HOURS].value == 12) {
+ retval.rt_field[RTF_HOURS] = 0;
+ }
+ } else if (retval.rt_field[RTF_HOURS].value < 12) {
+ retval.rt_field[RTF_HOURS].value += 12;
+ }
+ if (base_token == RTT_AFTER) {
+ std::chrono::microseconds usecs = 0s;
+ uint64_t carry = 0;
+
+ if (retval.rt_field[RTF_MICROSECONDS].value > 0) {
+ usecs += std::chrono::microseconds(
+ 1000000ULL
+ - retval.rt_field[RTF_MICROSECONDS].value);
+ carry = 1;
+ }
+ if (carry || retval.rt_field[RTF_SECONDS].value > 0) {
+ usecs += std::chrono::seconds(
+ 60 - carry
+ - retval.rt_field[RTF_SECONDS].value);
+ carry = 1;
+ }
+ if (carry || retval.rt_field[RTF_MINUTES].value > 0) {
+ usecs += std::chrono::minutes(
+ 60 - carry
+ - retval.rt_field[RTF_MINUTES].value);
+ carry = 1;
+ }
+ usecs += std::chrono::hours(
+ 24 - retval.rt_field[RTF_HOURS].value);
+ retval.rt_duration = usecs;
+ }
+ if (base_token == RTT_BEFORE) {
+ retval.rt_duration
+ = std::chrono::hours(
+ retval.rt_field[RTF_HOURS].value)
+ + std::chrono::minutes(
+ retval.rt_field[RTF_MINUTES].value)
+ + std::chrono::seconds(
+ retval.rt_field[RTF_SECONDS].value)
+ + std::chrono::microseconds(
+ retval.rt_field[RTF_MICROSECONDS].value);
+ retval.rt_field[RTF_HOURS].value = 0;
+ retval.rt_field[RTF_MINUTES].value = 0;
+ retval.rt_field[RTF_SECONDS].value = 0;
+ retval.rt_field[RTF_MICROSECONDS].value = 0;
+ }
+ base_token = RTT_INVALID;
+ break;
+ case RTT_A:
+ case RTT_AN:
+ number = 1;
+ number_set = true;
+ break;
+ case RTT_AT:
+ break;
+ case RTT_TIME: {
+ const auto hstr = md[1]->to_string();
+ const auto mstr = md[2]->to_string();
+ retval.rt_field[RTF_HOURS] = atoi(hstr.c_str());
+ retval.rt_field[RTF_MINUTES] = atoi(mstr.c_str());
+ if (md[3]) {
+ const auto sstr = md[3]->to_string();
+ retval.rt_field[RTF_SECONDS] = atoi(sstr.c_str());
+ if (md[4]) {
+ const auto substr = md[4]->to_string();
+
+ switch (substr.length()) {
+ case 3:
+ retval.rt_field[RTF_MICROSECONDS]
+ = atoi(substr.c_str()) * 1000;
+ break;
+ case 6:
+ retval.rt_field[RTF_MICROSECONDS]
+ = atoi(substr.c_str());
+ break;
+ }
+ } else {
+ retval.rt_field[RTF_MICROSECONDS].clear();
+ retval.rt_duration = 1s;
+ }
+ } else {
+ retval.rt_field[RTF_SECONDS].clear();
+ retval.rt_field[RTF_MICROSECONDS].clear();
+ retval.rt_duration = 1min;
+ }
+ retval.rt_absolute_field_end = RTF__MAX;
+ break;
+ }
+ case RTT_NUMBER: {
+ if (number_set) {
+ pe_out.pe_msg
+ = "No time unit given for the previous number";
+ return Err(pe_out);
+ }
+
+ auto num_scan_res
+ = scn::scan_value<int64_t>(md[0]->to_string_view());
+
+ if (!num_scan_res) {
+ pe_out.pe_msg = fmt::format(
+ FMT_STRING("Invalid number: {}"), md[0].value());
+ return Err(pe_out);
+ }
+ number = num_scan_res.value();
+ number_set = true;
+ break;
+ }
+ case RTT_MICROS:
+ retval.rt_field[RTF_MICROSECONDS] = number;
+ break;
+ case RTT_MILLIS:
+ retval.rt_field[RTF_MICROSECONDS] = number * 1000;
+ break;
+ case RTT_SECONDS:
+ if (number_was_set) {
+ retval.rt_field[RTF_SECONDS] = number;
+ curr_field_type = RTF_SECONDS;
+ } else if (next_set) {
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_absolute_field_end = RTF__MAX;
+ }
+ break;
+ case RTT_MINUTES:
+ if (number_was_set) {
+ retval.rt_field[RTF_MINUTES] = number;
+ curr_field_type = RTF_MINUTES;
+ } else if (next_set) {
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_absolute_field_end = RTF__MAX;
+ }
+ break;
+ case RTT_HOURS:
+ if (number_was_set) {
+ retval.rt_field[RTF_HOURS] = number;
+ curr_field_type = RTF_HOURS;
+ } else if (next_set) {
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_field[RTF_MINUTES] = 0;
+ retval.rt_absolute_field_end = RTF__MAX;
+ }
+ break;
+ case RTT_DAYS:
+ if (number_was_set) {
+ retval.rt_field[RTF_DAYS] = number;
+ curr_field_type = RTF_DAYS;
+ } else if (next_set) {
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_field[RTF_MINUTES] = 0;
+ retval.rt_field[RTF_HOURS] = 0;
+ retval.rt_absolute_field_end = RTF__MAX;
+ }
+ break;
+ case RTT_WEEKS:
+ retval.rt_field[RTF_DAYS] = number * 7;
+ break;
+ case RTT_MONTHS:
+ if (number_was_set) {
+ retval.rt_field[RTF_MONTHS] = number;
+ curr_field_type = RTF_MONTHS;
+ } else if (next_set) {
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_field[RTF_MINUTES] = 0;
+ retval.rt_field[RTF_HOURS] = 0;
+ retval.rt_field[RTF_DAYS] = 0;
+ retval.rt_absolute_field_end = RTF__MAX;
+ }
+ break;
+ case RTT_YEARS:
+ if (number_was_set) {
+ retval.rt_field[RTF_YEARS] = number;
+ curr_field_type = RTF_YEARS;
+ } else if (next_set) {
+ retval.rt_field[RTF_MICROSECONDS] = 0;
+ retval.rt_field[RTF_SECONDS] = 0;
+ retval.rt_field[RTF_MINUTES] = 0;
+ retval.rt_field[RTF_HOURS] = 0;
+ retval.rt_field[RTF_DAYS] = 0;
+ retval.rt_field[RTF_MONTHS] = 0;
+ retval.rt_absolute_field_end = RTF__MAX;
+ }
+ break;
+ case RTT_AGO:
+ if (retval.empty()) {
+ pe_out.pe_msg = "Expecting a time unit";
+ return Err(pe_out);
+ }
+ for (int field = 0; field < RTF__MAX; field++) {
+ if (retval.rt_field[field].value > 0) {
+ retval.rt_field[field]
+ = -retval.rt_field[field].value;
+ }
+ if (last_field_type != RTF__MAX
+ && field < last_field_type)
+ {
+ retval.rt_field[field] = 0;
+ }
+ }
+ if (last_field_type != RTF__MAX) {
+ retval.rt_absolute_field_end = last_field_type;
+ }
+ break;
+ case RTT_BEFORE:
+ case RTT_AFTER:
+ if (base_token != RTT_INVALID) {
+ pe_out.pe_msg
+ = "Before/after ranges are not supported yet";
+ return Err(pe_out);
+ }
+ base_token = token;
+ break;
+ case RTT_LATER:
+ if (retval.empty()) {
+ pe_out.pe_msg = "Expecting a time unit before 'later'";
+ return Err(pe_out);
+ }
+ break;
+ case RTT_HERE:
+ break;
+ case RTT_NEXT:
+ retval.rt_next = true;
+ next_set = true;
+ break;
+ case RTT_PREVIOUS:
+ retval.rt_previous = true;
+ next_set = true;
+ break;
+ case RTT_TOMORROW:
+ retval.rt_field[RTF_DAYS] = 1;
+ break;
+ case RTT_NOON:
+ retval.rt_field[RTF_HOURS] = 12;
+ retval.rt_absolute_field_end = RTF__MAX;
+ for (int lpc2 = RTF_MICROSECONDS; lpc2 < RTF_HOURS; lpc2++)
+ {
+ retval.rt_field[lpc2] = 0;
+ }
+ break;
+
+ case RTT_SUNDAY:
+ case RTT_MONDAY:
+ case RTT_TUESDAY:
+ case RTT_WEDNESDAY:
+ case RTT_THURSDAY:
+ case RTT_FRIDAY:
+ case RTT_SATURDAY:
+ if (retval.rt_duration == 0s) {
+ switch (base_token) {
+ case RTT_BEFORE:
+ if (token == RTT_SUNDAY) {
+ pe_out.pe_msg
+ = "Sunday is the start of the week, so "
+ "there is nothing before it";
+ return Err(pe_out);
+ }
+ for (int wday = RTT_SUNDAY; wday < token;
+ wday++)
+ {
+ retval.rt_included_days.insert(
+ (token_t) wday);
+ }
+ break;
+ case RTT_AFTER:
+ if (token == RTT_SATURDAY) {
+ pe_out.pe_msg
+ = "Saturday is the end of the week, so "
+ "there is nothing after it";
+ return Err(pe_out);
+ }
+ for (int wday = RTT_SATURDAY; wday > token;
+ wday--)
+ {
+ retval.rt_included_days.insert(
+ (token_t) wday);
+ }
+ break;
+ default:
+ retval.rt_included_days.insert(token);
+ break;
+ }
+ base_token = RTT_INVALID;
+ } else {
+ retval.rt_included_days.insert(token);
+ }
+ if (retval.rt_duration == 0s) {
+ retval.rt_duration = 24h;
+ }
+ break;
+
+ case RTT__MAX:
+ ensure(false);
+ break;
+ }
+
+ if (token != RTT_NEXT && token != RTT_PREVIOUS
+ && token != RTT_WHITE)
+ {
+ next_set = false;
+ }
+
+ number_was_set = false;
+ seen_tokens.insert(token);
+ }
+
+ if (!found) {
+ pe_out.pe_msg = "Unrecognized input";
+ return Err(pe_out);
+ }
+
+ last_field_type = curr_field_type;
+ }
+}
+
+void
+relative_time::rollover()
+{
+ for (int lpc = 0; lpc < RTF_DAYS; lpc++) {
+ if (!this->rt_field[lpc].is_set) {
+ continue;
+ }
+ int64_t val = this->rt_field[lpc].value;
+ this->rt_field[lpc].value = val % TIME_SCALES[lpc];
+ this->rt_field[lpc + 1].value += val / TIME_SCALES[lpc];
+ if (this->rt_field[lpc + 1].value) {
+ this->rt_field[lpc + 1].is_set = true;
+ }
+ }
+ if (std::abs(this->rt_field[RTF_DAYS].value) > 31) {
+ int64_t val = this->rt_field[RTF_DAYS].value;
+ this->rt_field[RTF_DAYS].value = val % 31;
+ this->rt_field[RTF_MONTHS].value += val / 31;
+ if (this->rt_field[RTF_MONTHS].value) {
+ this->rt_field[RTF_MONTHS].is_set = true;
+ }
+ }
+ if (std::abs(this->rt_field[RTF_MONTHS].value) > 12) {
+ int64_t val = this->rt_field[RTF_MONTHS].value;
+ this->rt_field[RTF_MONTHS].value = val % 12;
+ this->rt_field[RTF_YEARS].value += val / 12;
+ if (this->rt_field[RTF_YEARS].value) {
+ this->rt_field[RTF_YEARS].is_set = true;
+ }
+ }
+}
+
+relative_time
+relative_time::from_timeval(const struct timeval& tv)
+{
+ relative_time retval;
+
+ retval.clear();
+ retval.rt_field[RTF_SECONDS] = tv.tv_sec;
+ retval.rt_field[RTF_MICROSECONDS] = tv.tv_usec;
+ retval.rollover();
+
+ return retval;
+}
+
+relative_time
+relative_time::from_usecs(std::chrono::microseconds usecs)
+{
+ relative_time retval;
+
+ retval.clear();
+ retval.rt_field[RTF_MICROSECONDS] = usecs.count();
+ retval.rollover();
+
+ return retval;
+}
+
+std::string
+relative_time::to_string() const
+{
+ static const char* DAYS[] = {
+ "sun",
+ "mon",
+ "tue",
+ "wed",
+ "thu",
+ "fri",
+ "sat",
+ };
+
+ char dst[128] = "";
+ char* pos = dst;
+
+ if (this->is_absolute()) {
+ for (const auto& day_token : this->rt_included_days) {
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ "%s ",
+ DAYS[day_token - RTT_SUNDAY]);
+ }
+
+ pos += snprintf(
+ pos,
+ sizeof(dst) - (pos - dst),
+ "%s",
+ this->rt_next ? "next " : (this->rt_previous ? "last " : ""));
+ if (this->rt_field[RTF_YEARS].is_set
+ && (this->rt_next || this->rt_previous
+ || this->rt_field[RTF_YEARS].value != 0))
+ {
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ "year %" PRId64 " ",
+ this->rt_field[RTF_YEARS].value);
+ } else if ((this->rt_next || this->rt_previous)
+ && this->rt_field[RTF_MONTHS].is_set)
+ {
+ pos += snprintf(pos, sizeof(dst) - (pos - dst), "year ");
+ }
+ if (this->rt_field[RTF_MONTHS].is_set
+ && (this->rt_next || this->rt_previous
+ || this->rt_field[RTF_MONTHS].value != 0))
+ {
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ "month %" PRId64 " ",
+ this->rt_field[RTF_MONTHS].value);
+ } else if ((this->rt_next || this->rt_previous)
+ && this->rt_field[RTF_DAYS].is_set)
+ {
+ pos += snprintf(pos, sizeof(dst) - (pos - dst), "month ");
+ }
+ if (this->rt_field[RTF_DAYS].is_set
+ && (this->rt_next || this->rt_previous
+ || this->rt_field[RTF_DAYS].value != 0))
+ {
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ "day %" PRId64 " ",
+ this->rt_field[RTF_DAYS].value);
+ } else if ((this->rt_next || this->rt_previous)
+ && this->rt_field[RTF_HOURS].is_set)
+ {
+ pos += snprintf(pos, sizeof(dst) - (pos - dst), "day ");
+ }
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ "%" PRId64 ":%02" PRId64,
+ this->rt_field[RTF_HOURS].value,
+ this->rt_field[RTF_MINUTES].value);
+ if (this->rt_field[RTF_SECONDS].is_set
+ && this->rt_field[RTF_SECONDS].value != 0)
+ {
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ ":%.02" PRId64,
+ this->rt_field[RTF_SECONDS].value);
+ if (this->rt_field[RTF_MICROSECONDS].is_set
+ && this->rt_field[RTF_MICROSECONDS].value != 0)
+ {
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ ".%.03" PRId64,
+ this->rt_field[RTF_MICROSECONDS].value / 1000);
+ }
+ }
+ } else {
+ for (int lpc = RTF__MAX - 1; lpc >= 0; lpc--) {
+ if (this->rt_field[lpc].value == 0) {
+ continue;
+ }
+ pos += snprintf(pos,
+ sizeof(dst) - (pos - dst),
+ "%" PRId64 "%c",
+ this->rt_field[lpc].value,
+ FIELD_CHARS[lpc]);
+ }
+ }
+
+ if (dst[0] == '\0') {
+ dst[0] = '0';
+ dst[1] = 's';
+ dst[2] = '\0';
+ }
+
+ return dst;
+}
+
+struct exttm
+relative_time::adjust(const exttm& tm) const
+{
+ auto retval = tm;
+
+ if (this->rt_field[RTF_MICROSECONDS].is_set
+ && this->is_absolute(RTF_MICROSECONDS))
+ {
+ retval.et_nsec = this->rt_field[RTF_MICROSECONDS].value * 1000;
+ } else {
+ retval.et_nsec += this->rt_field[RTF_MICROSECONDS].value * 1000;
+ }
+ if (this->rt_field[RTF_SECONDS].is_set && this->is_absolute(RTF_SECONDS)) {
+ if (this->rt_next
+ && this->rt_field[RTF_SECONDS].value <= tm.et_tm.tm_sec)
+ {
+ retval.et_tm.tm_min += 1;
+ }
+ if (this->rt_previous
+ && this->rt_field[RTF_SECONDS].value >= tm.et_tm.tm_sec)
+ {
+ retval.et_tm.tm_min -= 1;
+ }
+ retval.et_tm.tm_sec = this->rt_field[RTF_SECONDS].value;
+ } else {
+ retval.et_tm.tm_sec += this->rt_field[RTF_SECONDS].value;
+ }
+ if (this->rt_field[RTF_MINUTES].is_set && this->is_absolute(RTF_MINUTES)) {
+ if (this->rt_next
+ && this->rt_field[RTF_MINUTES].value <= tm.et_tm.tm_min)
+ {
+ retval.et_tm.tm_hour += 1;
+ }
+ if (this->rt_previous
+ && (this->rt_field[RTF_MINUTES].value == 0
+ || (this->rt_field[RTF_MINUTES].value >= tm.et_tm.tm_min)))
+ {
+ retval.et_tm.tm_hour -= 1;
+ }
+ retval.et_tm.tm_min = this->rt_field[RTF_MINUTES].value;
+ } else {
+ retval.et_tm.tm_min += this->rt_field[RTF_MINUTES].value;
+ }
+ if (this->rt_field[RTF_HOURS].is_set && this->is_absolute(RTF_HOURS)) {
+ if (this->rt_next
+ && this->rt_field[RTF_HOURS].value <= tm.et_tm.tm_hour)
+ {
+ retval.et_tm.tm_mday += 1;
+ }
+ if (this->rt_previous
+ && this->rt_field[RTF_HOURS].value >= tm.et_tm.tm_hour)
+ {
+ retval.et_tm.tm_mday -= 1;
+ }
+ retval.et_tm.tm_hour = this->rt_field[RTF_HOURS].value;
+ } else {
+ retval.et_tm.tm_hour += this->rt_field[RTF_HOURS].value;
+ }
+ if (this->rt_field[RTF_DAYS].is_set && this->is_absolute(RTF_DAYS)) {
+ if (this->rt_next && this->rt_field[RTF_DAYS].value <= tm.et_tm.tm_mday)
+ {
+ retval.et_tm.tm_mon += 1;
+ }
+ if (this->rt_previous
+ && this->rt_field[RTF_DAYS].value >= tm.et_tm.tm_mday)
+ {
+ retval.et_tm.tm_mon -= 1;
+ }
+ retval.et_tm.tm_mday = this->rt_field[RTF_DAYS].value;
+ } else {
+ retval.et_tm.tm_mday += this->rt_field[RTF_DAYS].value;
+ }
+ if (this->rt_field[RTF_MONTHS].is_set && this->is_absolute(RTF_MONTHS)) {
+ if (this->rt_next
+ && this->rt_field[RTF_MONTHS].value <= tm.et_tm.tm_mon)
+ {
+ retval.et_tm.tm_year += 1;
+ }
+ if (this->rt_previous
+ && this->rt_field[RTF_MONTHS].value >= tm.et_tm.tm_mon)
+ {
+ retval.et_tm.tm_year -= 1;
+ }
+ retval.et_tm.tm_mon = this->rt_field[RTF_MONTHS].value;
+ } else {
+ retval.et_tm.tm_mon += this->rt_field[RTF_MONTHS].value;
+ }
+ if (this->rt_field[RTF_YEARS].is_set && this->is_absolute(RTF_YEARS)) {
+ retval.et_tm.tm_year = this->rt_field[RTF_YEARS].value;
+ } else {
+ retval.et_tm.tm_year += this->rt_field[RTF_YEARS].value;
+ }
+
+ return retval;
+}
+
+nonstd::optional<exttm>
+relative_time::window_start(const struct exttm& tm) const
+{
+ auto retval = tm;
+
+ if (this->is_relative()) {
+ uint64_t us, remainder;
+
+ auto tv = tm.to_timeval();
+ us = (uint64_t) tv.tv_sec * 1000000ULL + (uint64_t) tv.tv_usec;
+ remainder = us % this->to_microseconds();
+ us -= remainder;
+
+ tv.tv_sec = us / 1000000ULL;
+ tv.tv_usec = us % 1000000ULL;
+
+ retval.et_tm = *gmtime(&tv.tv_sec);
+ retval.et_nsec = tv.tv_usec * 1000ULL;
+
+ return retval;
+ }
+
+ bool clear = false;
+
+ if (this->rt_field[RTF_YEARS].is_set) {
+ if (this->rt_field[RTF_YEARS].value > tm.et_tm.tm_year) {
+ return nonstd::nullopt;
+ }
+ retval.et_tm.tm_year = this->rt_field[RTF_YEARS].value;
+ clear = true;
+ }
+
+ if (this->rt_field[RTF_MONTHS].is_set) {
+ if (this->rt_field[RTF_MONTHS].value > tm.et_tm.tm_mon) {
+ return nonstd::nullopt;
+ }
+ retval.et_tm.tm_mon = this->rt_field[RTF_MONTHS].value;
+ clear = true;
+ } else if (clear) {
+ retval.et_tm.tm_mon = 0;
+ }
+
+ if (this->rt_field[RTF_DAYS].is_set) {
+ if (this->rt_field[RTF_DAYS].value > tm.et_tm.tm_mday) {
+ return nonstd::nullopt;
+ }
+ retval.et_tm.tm_mday = this->rt_field[RTF_DAYS].value;
+ clear = true;
+ } else if (clear) {
+ retval.et_tm.tm_mday = 1;
+ }
+
+ if (!this->rt_included_days.empty()) {
+ auto iter = this->rt_included_days.find(
+ (token_t) (RTT_SUNDAY + tm.et_tm.tm_wday));
+
+ if (iter == this->rt_included_days.end()) {
+ return nonstd::nullopt;
+ }
+ clear = true;
+ }
+
+ if (this->rt_field[RTF_HOURS].is_set) {
+ if (this->rt_field[RTF_HOURS].value > tm.et_tm.tm_hour) {
+ return nonstd::nullopt;
+ }
+ retval.et_tm.tm_hour = this->rt_field[RTF_HOURS].value;
+ clear = true;
+ } else if (clear) {
+ retval.et_tm.tm_hour = 0;
+ }
+
+ if (this->rt_field[RTF_MINUTES].is_set) {
+ if (this->rt_field[RTF_MINUTES].value > tm.et_tm.tm_min) {
+ return nonstd::nullopt;
+ }
+ retval.et_tm.tm_min = this->rt_field[RTF_MINUTES].value;
+ clear = true;
+ } else if (clear) {
+ retval.et_tm.tm_min = 0;
+ }
+
+ if (this->rt_field[RTF_SECONDS].is_set) {
+ if (this->rt_field[RTF_SECONDS].value > tm.et_tm.tm_sec) {
+ return nonstd::nullopt;
+ }
+ retval.et_tm.tm_sec = this->rt_field[RTF_SECONDS].value;
+ clear = true;
+ } else if (clear) {
+ retval.et_tm.tm_sec = 0;
+ }
+
+ if (this->rt_field[RTF_MICROSECONDS].is_set) {
+ if (this->rt_field[RTF_MICROSECONDS].value > tm.et_nsec / 1000) {
+ return nonstd::nullopt;
+ }
+ retval.et_nsec = this->rt_field[RTF_MICROSECONDS].value * 1000ULL;
+ clear = true;
+ } else if (clear) {
+ retval.et_nsec = 0;
+ }
+
+ auto tv = tm.to_timeval();
+ auto start_time = retval.to_timeval();
+ auto end_time = relative_time::from_usecs(this->rt_duration)
+ .adjust(retval)
+ .to_timeval();
+
+ if (tv < start_time || end_time < tv) {
+ return nonstd::nullopt;
+ }
+
+ return retval;
+}
+
+int64_t
+relative_time::to_microseconds() const
+{
+ int64_t retval;
+
+ if (this->is_absolute()) {
+ struct exttm etm;
+
+ memset(&etm, 0, sizeof(etm));
+ etm.et_tm.tm_year = this->rt_field[RTF_YEARS].value;
+ etm.et_tm.tm_mon = this->rt_field[RTF_MONTHS].value;
+ if (this->rt_field[RTF_DAYS].is_set) {
+ etm.et_tm.tm_mday = this->rt_field[RTF_DAYS].value;
+ } else {
+ etm.et_tm.tm_mday = 1;
+ }
+ etm.et_tm.tm_min = this->rt_field[RTF_MINUTES].value;
+ etm.et_tm.tm_sec = this->rt_field[RTF_SECONDS].value;
+
+ auto epoch_secs = std::chrono::seconds(tm2sec(&etm.et_tm));
+ retval
+ = std::chrono::duration_cast<std::chrono::microseconds>(epoch_secs)
+ .count();
+ retval += this->rt_field[RTF_MICROSECONDS].value;
+ } else {
+ retval = this->rt_field[RTF_YEARS].value * 12;
+ retval = (retval + this->rt_field[RTF_MONTHS].value) * 30;
+ retval = (retval + this->rt_field[RTF_DAYS].value) * 24;
+ retval = (retval + this->rt_field[RTF_HOURS].value) * 60;
+ retval = (retval + this->rt_field[RTF_MINUTES].value) * 60;
+ retval = (retval + this->rt_field[RTF_SECONDS].value) * 1000 * 1000;
+ retval = (retval + this->rt_field[RTF_MICROSECONDS].value);
+ }
+
+ return retval;
+}