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/*
This file is part of procinfo-NG
procinfo-NG/routines.cpp is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; version 2.1.
procinfo-NG is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with procinfo-NG; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// Procinfo-NG is Copyright tabris@tabris.net 2007, 2008, 2009
#ifndef TIMEROUTINES_CPP
#define TIMEROUTINES_CPP
#include <time.h>
#include <sys/time.h>
struct timeWDHMS {
uint32_t weeks, days, hours, minutes;
double seconds;
};
#define secPerMin 60
#define minPerHour 60
#define hourPerDay 24
#define dayPerWeek 7
#define secPerHour secPerMin*minPerHour
#define secPerDay secPerMin*minPerHour*hourPerDay
#define monthPerYear 12
static inline double getCurTime() {
struct timeval timeNow;
gettimeofday(&timeNow, NULL);
return (double(timeNow.tv_sec) + double(timeNow.tv_usec) / double(1e6));
}
template <typename T> const static inline struct timeWDHMS splitTime(T difference) {
struct timeWDHMS time;
time.seconds = (double)(difference % secPerMin);
difference = (difference - (T)time.seconds) / secPerMin;
time.minutes = (uint32_t)(difference % minPerHour);
difference = (difference - time.minutes) / minPerHour;
time.hours = (uint32_t)(difference % hourPerDay);
difference = (difference - time.hours) / hourPerDay;
time.days = (uint32_t)(difference % hourPerDay);
time.weeks = (uint32_t)((difference - time.days) / dayPerWeek);
return time;
}
const static inline struct timeWDHMS splitTime(const double &difference) {
struct timeWDHMS time;
uint64_t difference2 = (uint64_t)(difference / secPerMin);
time.seconds = (difference - (difference2 * secPerMin));
time.minutes = (uint32_t)(difference2 % minPerHour);
difference2 = (uint64_t)(difference2 - time.minutes) / minPerHour;
time.hours = (uint32_t)(difference2 % hourPerDay);
difference2 = (difference2 - time.hours) / hourPerDay;
time.days = (uint32_t)(difference2 % dayPerWeek);
time.weeks = (uint32_t)((difference2 - time.days) / dayPerWeek);
return time;
}
/* Nonzero if YEAR is a leap year (every 4 years,
except every 100th isn't, and every 400th is). */
// In case the macro isn't available in time.h
#ifndef __isleap
#define __isleap(year) \
!!((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
#endif
const static inline int __february_monthdays(const int year)
__attribute((always_inline));
const static inline int __february_monthdays(const int year) {
const int gregorianYear =
(year < 1500 ? year + 1900 : year);
if( __isleap(gregorianYear) ) { // macro from time.h
return 29;
} else {
return 28;
}
}
const static inline int get_monthdays(const int month, const int year) {
switch(month+1) {
/*
* +1 is b/c most time functions return 0-11, not 1-12
* This sucks rather hard, we have to trust that the
* programmer knows this.
*/
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
return 31;
case 4:
case 6:
case 9:
case 11:
return 30;
case 2:
return __february_monthdays(year);
default:
return 0;
}
}
struct timeDiff
{ // shamelessly stolen from time.h's struct tm and modified
double tm_sec; /* Seconds. [0-60] (1 leap second) */
int tm_min; /* Minutes. [0-59] */
int tm_hour; /* Hours. [0-23] */
int tm_wday; /* Day of week. [0-6] */
int tm_week; /* Week of month. [0-6] */
int tm_mon; /* Month. [0-11] */
int tm_year; /* Year - 1900. */
};
const static inline struct timeDiff __time_rel(const time_t &lesser_time, const time_t &greater_time) {
const struct timeWDHMS result1 = splitTime(greater_time - lesser_time);
const struct timeDiff result2 =
{ tm_sec: result1.seconds, tm_min: result1.minutes, tm_hour: result1.hours,
tm_wday: result1.days, tm_week: result1.weeks };
return result2;
}
const static inline struct timeDiff __time_rel(const double &lesser_time, const double &greater_time) {
const struct timeWDHMS result1 = splitTime(greater_time - lesser_time);
const struct timeDiff result2 =
{ tm_sec: result1.seconds, tm_min: result1.minutes, tm_hour: result1.hours,
tm_wday: result1.days, tm_week: result1.weeks };
return result2;
}
/*
This is for cases over 4 weeks, when we need years, months, weeks, and days
It is also aparrently unreliable for less than that time.
WARNING. This code used to be a port of some Perl code, but has since been changed a lot.
*/
const static inline struct timeDiff __time_rel_long(const struct timeDiff &lesser_time, const struct timeDiff &greater_time) {
struct timeDiff result = { tm_sec: 0 };
result.tm_sec = greater_time.tm_sec - lesser_time.tm_sec;
result.tm_min = greater_time.tm_min - lesser_time.tm_min;
if(result.tm_sec < 0) {
result.tm_sec += secPerMin; result.tm_min--;
}
result.tm_hour = greater_time.tm_hour - lesser_time.tm_hour;
if(result.tm_min < 0) {
result.tm_min += minPerHour; result.tm_hour--;
}
result.tm_wday = greater_time.tm_wday - lesser_time.tm_wday;
if(result.tm_hour < 0) {
result.tm_hour += hourPerDay; result.tm_wday--;
}
result.tm_mon = greater_time.tm_mon - lesser_time.tm_mon;
if(result.tm_wday < 0) {
result.tm_wday += get_monthdays(
(greater_time.tm_mon == 0 ? monthPerYear - 1 : greater_time.tm_mon - 1),
(greater_time.tm_mon == 0 ? greater_time.tm_year - 1 : greater_time.tm_year));
result.tm_mon--;
}
result.tm_week = result.tm_wday / dayPerWeek;
result.tm_wday %= dayPerWeek;
result.tm_year = greater_time.tm_year - lesser_time.tm_year;
if(result.tm_mon < 0) {
result.tm_mon += monthPerYear; result.tm_year--;
}
return result;
}
const static inline struct timeDiff structTM2structTD(struct tm input) {
const struct timeDiff result = {
tm_sec: input.tm_sec, tm_min: input.tm_min, tm_hour: input.tm_hour,
tm_wday: input.tm_mday, tm_week: 0, tm_mon: input.tm_mon,
tm_year: input.tm_year
};
return result;
}
const static inline struct timeDiff __time_rel_long(const time_t lesser_time, const time_t greater_time) {
struct tm __greater_time; gmtime_r(&greater_time, &__greater_time);
struct tm __lesser_time; gmtime_r(&lesser_time, &__lesser_time);
const struct timeDiff result = __time_rel_long(structTM2structTD(__lesser_time), structTM2structTD(__greater_time));
return result;
}
const static inline struct timeDiff __time_rel_long(const double lesser_time, const double greater_time) {
const time_t __greater_time = time_t(greater_time);
const time_t __lesser_time = time_t(lesser_time);
struct timeDiff result = __time_rel_long(__lesser_time, __greater_time);
result.tm_sec += getFrac(greater_time-lesser_time, 100)/100.0;
return result;
}
const static inline string time_rel_abbrev(const double &lesser_time, const double &greater_time) {
struct timeDiff result;
if((greater_time - lesser_time) > (secPerDay * dayPerWeek * 4)) {
result = __time_rel_long(lesser_time, greater_time);
} else {
result = __time_rel(lesser_time, greater_time);
}
string tmp;
char buf[64]; bzero(buf, 64);
if(result.tm_year) {
snprintf(buf, 63, "%dy", result.tm_year);
tmp = buf;
}
if(result.tm_mon) {
snprintf(buf, 63, "%s%s%dm", tmp.c_str(), (!tmp.empty() ? " " : ""), result.tm_mon);
tmp = buf;
}
if(result.tm_week) {
snprintf(buf, 63, "%s%s%dw", tmp.c_str(), (!tmp.empty() ? " " : ""), result.tm_week);
tmp = buf;
}
if(result.tm_wday) {
snprintf(buf, 63, "%s%s%dd", tmp.c_str(), (!tmp.empty() ? " " : ""), result.tm_wday);
tmp = buf;
}
snprintf(buf, 63, "%s%s%02d:%02d:%02d.%02d", tmp.c_str(), (!tmp.empty() ? " " : ""),
result.tm_hour, result.tm_min, (uint32_t)result.tm_sec,
getFrac(greater_time-lesser_time, 100));
return buf;
}
const static inline string time_rel_abbrev(const time_t lesser_time) {
const time_t greater_time = time(NULL);
return time_rel_abbrev(lesser_time, greater_time);
}
const static inline string time_rel_abbrev(const double lesser_time) {
const double greater_time = getCurTime();
return time_rel_abbrev(lesser_time, greater_time);
}
#endif
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