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lnav/src/relative_time.cc

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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/pcrepp.hh"
using namespace std::chrono_literals;
static const struct {
const char* name;
pcrepp pcre;
} MATCHERS[relative_time::RTT__MAX] = {
{"ws", pcrepp("\\A\\s+\\b")},
{"am", pcrepp("\\Aam|a\\.m\\.\\b")},
{"pm", pcrepp("\\Apm|p\\.m\\.\\b")},
{"a", pcrepp("\\Aa\\b")},
{"an", pcrepp("\\Aan\\b")},
{"at", pcrepp("\\Aat\\b")},
{"time", pcrepp("\\A(\\d{1,2}):(\\d{2})(?::(\\d{2})(?:\\.(\\d{3,6}))?)?")},
{"num", pcrepp("\\A((?:-|\\+)?\\d+)")},
{"sun", pcrepp("\\Asun(days?)?\\b")},
{"mon", pcrepp("\\Amon(days?)?\\b")},
{"tue", pcrepp("\\Atue(s(days?)?)?\\b")},
{"wed", pcrepp("\\Awed(nesdays?)?\\b")},
{"thu", pcrepp("\\Athu(rsdays?)?\\b")},
{"fri", pcrepp("\\Afri(days?)?\\b")},
{"sat", pcrepp("\\Asat(urdays?)?\\b")},
{"us", pcrepp("\\A(?:micros(?:econds?)?|us(?![a-zA-Z]))")},
{"ms", pcrepp("\\A(?:millis(?:econds?)?|ms(?![a-zA-Z]))")},
{"sec", pcrepp("\\As(?:ec(?:onds?)?)?(?![a-zA-Z])")},
{"min", pcrepp("\\Am(?:in(?:utes?)?)?(?![a-zA-Z])")},
{"h", pcrepp("\\Ah(?:ours?)?(?![a-zA-Z])")},
{"day", pcrepp("\\Ad(?:ays?)?(?![a-zA-Z])")},
{"week", pcrepp("\\Aw(?:eeks?)?(?![a-zA-Z])")},
{"mon", pcrepp("\\Amon(?:ths?)?(?![a-zA-Z])")},
{"year", pcrepp("\\Ay(?:ears?)?(?![a-zA-Z])")},
{"today", pcrepp("\\Atoday\\b")},
{"yest", pcrepp("\\Ayesterday\\b")},
{"tomo", pcrepp("\\Atomorrow\\b")},
{"noon", pcrepp("\\Anoon\\b")},
{"and", pcrepp("\\Aand\\b")},
{"the", pcrepp("\\Athe\\b")},
{"ago", pcrepp("\\Aago\\b")},
{"lter", pcrepp("\\Alater\\b")},
{"bfor", pcrepp("\\Abefore\\b")},
{"aft", pcrepp("\\Aafter\\b")},
{"now", pcrepp("\\Anow\\b")},
{"here", pcrepp("\\Ahere\\b")},
{"next", pcrepp("\\Anext\\b")},
{"previous", pcrepp("\\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(const char* str, size_t len)
{
pcre_input pi(str, 0, len);
pcre_context_static<30> pc;
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();
while (true) {
rt_field_type curr_field_type = RTF__MAX;
if (pi.pi_next_offset >= pi.pi_length) {
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++) {
token_t token = (token_t) lpc;
if (!MATCHERS[lpc].pcre.match(pc, pi, PCRE_ANCHORED)) {
continue;
}
pe_out.pe_column = pc.all()->c_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 = pi.get_substr(pc[0]);
const auto mstr = pi.get_substr(pc[1]);
retval.rt_field[RTF_HOURS] = atoi(hstr.c_str());
retval.rt_field[RTF_MINUTES] = atoi(mstr.c_str());
if (pc[2]->is_valid()) {
const auto sstr = pi.get_substr(pc[2]);
retval.rt_field[RTF_SECONDS] = atoi(sstr.c_str());
if (pc[3]->is_valid()) {
const auto substr = pi.get_substr(pc[3]);
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);
}
const auto numstr = pi.get_substr(pc[0]);
if (sscanf(numstr.c_str(), "%" PRId64, &number) != 1) {
pe_out.pe_msg = "Invalid number: " + numstr;
return Err(pe_out);
}
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;
}
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