mirror of https://github.com/tstack/lnav.git
134 lines
3.7 KiB
C++
134 lines
3.7 KiB
C++
/**
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* Copyright (c) 2020, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lnav_time_util_hh
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#define lnav_time_util_hh
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#include <time.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <string.h>
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struct tm *secs2tm(time_t *tim_p, struct tm *res);
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/**
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* Convert the time stored in a 'tm' struct into epoch time.
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*
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* @param t The 'tm' structure to convert to epoch time.
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* @return The given time in seconds since the epoch.
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*/
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time_t tm2sec(const struct tm *t);
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void secs2wday(const struct timeval &tv, struct tm *res);
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inline
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time_t convert_log_time_to_local(time_t value) {
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struct tm tm;
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localtime_r(&value, &tm);
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#ifdef HAVE_STRUCT_TM_TM_ZONE
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tm.tm_zone = NULL;
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#endif
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tm.tm_isdst = 0;
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return tm2sec(&tm);
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}
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constexpr time_t MAX_TIME_T = 4000000000LL;
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enum exttm_bits_t {
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ETB_YEAR_SET,
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ETB_MONTH_SET,
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ETB_DAY_SET,
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ETB_MACHINE_ORIENTED,
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ETB_EPOCH_TIME,
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};
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enum exttm_flags_t {
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ETF_YEAR_SET = (1UL << ETB_YEAR_SET),
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ETF_MONTH_SET = (1UL << ETB_MONTH_SET),
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ETF_DAY_SET = (1UL << ETB_DAY_SET),
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ETF_MACHINE_ORIENTED = (1UL << ETB_MACHINE_ORIENTED),
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ETF_EPOCH_TIME = (1UL << ETB_EPOCH_TIME),
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};
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struct exttm {
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struct tm et_tm;
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int32_t et_nsec;
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unsigned int et_flags;
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long et_gmtoff;
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bool operator==(const exttm &other) const {
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return memcmp(this, &other, sizeof(exttm)) == 0;
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};
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struct timeval to_timeval() const;
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};
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inline
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bool operator<(const struct timeval &left, time_t right) {
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return left.tv_sec < right;
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}
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inline
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bool operator<(time_t left, const struct timeval &right) {
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return left < right.tv_sec;
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}
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inline
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bool operator<(const struct timeval &left, const struct timeval &right) {
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return left.tv_sec < right.tv_sec ||
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((left.tv_sec == right.tv_sec) && (left.tv_usec < right.tv_usec));
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}
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inline
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bool operator!=(const struct timeval &left, const struct timeval &right) {
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return left.tv_sec != right.tv_sec ||
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left.tv_usec != right.tv_usec;
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}
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typedef int64_t mstime_t;
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inline mstime_t getmstime() {
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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return tv.tv_sec * 1000ULL + tv.tv_usec / 1000ULL;
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}
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inline time_t day_num(time_t ti)
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{
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return ti / (24 * 60 * 60);
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}
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inline time_t hour_num(time_t ti)
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{
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return ti / (60 * 60);
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}
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#endif
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