Andrew Boyson / clock

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   oldheating gps motorhome heating

tm/tm.c@37:330b844f54b6, 2018-12-01 (annotated)

Committer:
andrewboyson
Date:
Sat Dec 01 19:13:29 2018 +0000
Revision:
37:330b844f54b6
Parent:
35:ba9f575aa3c6
Child:
38:25b2a3c494aa
Modified to remove dependence on time_t (32bit) and used an int64 instead.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 37:330b844f54b6 1 #include <time.h>
andrewboyson 26:0421132e6eaf 2 #include <stdlib.h>
andrewboyson 26:0421132e6eaf 3 #include <stdio.h>
andrewboyson 26:0421132e6eaf 4 #include <string.h>
andrewboyson 26:0421132e6eaf 5 #include <stdbool.h>
andrewboyson 37:330b844f54b6 6 #include <stdint.h>
andrewboyson 26:0421132e6eaf 7
andrewboyson 26:0421132e6eaf 8 #define STD_OFFSET 0
andrewboyson 26:0421132e6eaf 9 #define DST_OFFSET 1
andrewboyson 26:0421132e6eaf 10
andrewboyson 37:330b844f54b6 11
andrewboyson 26:0421132e6eaf 12 static bool isLeapYear(int year)
andrewboyson 26:0421132e6eaf 13 {
andrewboyson 26:0421132e6eaf 14 year += 1900;
andrewboyson 26:0421132e6eaf 15 bool leapYear = !(year & 0x3);
andrewboyson 26:0421132e6eaf 16 if (year >= 2100)
andrewboyson 26:0421132e6eaf 17 {
andrewboyson 26:0421132e6eaf 18 if (year % 100 == 0) leapYear = false;
andrewboyson 26:0421132e6eaf 19 if (year % 400 == 0) leapYear = true;
andrewboyson 26:0421132e6eaf 20 }
andrewboyson 26:0421132e6eaf 21 return leapYear;
andrewboyson 26:0421132e6eaf 22
andrewboyson 26:0421132e6eaf 23 }
andrewboyson 26:0421132e6eaf 24 static int monthLength(int year, int month)
andrewboyson 26:0421132e6eaf 25 {
andrewboyson 26:0421132e6eaf 26 static char monthlengths[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
andrewboyson 26:0421132e6eaf 27 int daysInMonth = monthlengths[month];
andrewboyson 26:0421132e6eaf 28 if (month == 1 && isLeapYear(year)) daysInMonth++; //February is month 1 of months 0 to 11
andrewboyson 26:0421132e6eaf 29 return daysInMonth;
andrewboyson 26:0421132e6eaf 30 }
andrewboyson 26:0421132e6eaf 31 static bool isDst(int year, int month, int dayOfMonth, int dayOfWeek, int hours)
andrewboyson 26:0421132e6eaf 32 {
andrewboyson 26:0421132e6eaf 33 //Find the last Sunday in the month
andrewboyson 26:0421132e6eaf 34 int lastDayOfMonth = monthLength(year, month);
andrewboyson 26:0421132e6eaf 35 int daysToEndOfMonth = lastDayOfMonth - dayOfMonth;
andrewboyson 26:0421132e6eaf 36 int dayOfWeekOfLastDayOfMonth = (dayOfWeek + daysToEndOfMonth) % 7;
andrewboyson 26:0421132e6eaf 37 int lastSundayDayOfMonth = lastDayOfMonth - dayOfWeekOfLastDayOfMonth;
andrewboyson 26:0421132e6eaf 38
andrewboyson 26:0421132e6eaf 39 //Check each month
andrewboyson 26:0421132e6eaf 40 if (month <= 1) return false; //Jan, Feb
andrewboyson 26:0421132e6eaf 41 if (month == 2) //Mar - DST true after 1am UTC on the last Sunday in March
andrewboyson 26:0421132e6eaf 42 {
andrewboyson 26:0421132e6eaf 43 if (dayOfMonth < lastSundayDayOfMonth) return false;
andrewboyson 26:0421132e6eaf 44 if (dayOfMonth == lastSundayDayOfMonth) return hours >= 1;
andrewboyson 26:0421132e6eaf 45 if (dayOfMonth > lastSundayDayOfMonth) return true;
andrewboyson 26:0421132e6eaf 46 }
andrewboyson 26:0421132e6eaf 47 if (month >= 3 && month <= 8) return true; //Apr, May, Jun, Jul, Aug, Sep
andrewboyson 26:0421132e6eaf 48 if (month == 9) //Oct - DST false after 1am UTC on the last Sunday in October
andrewboyson 26:0421132e6eaf 49 {
andrewboyson 26:0421132e6eaf 50 if (dayOfMonth < lastSundayDayOfMonth) return true;
andrewboyson 26:0421132e6eaf 51 if (dayOfMonth == lastSundayDayOfMonth) return hours < 1;
andrewboyson 26:0421132e6eaf 52 if (dayOfMonth > lastSundayDayOfMonth) return false;
andrewboyson 26:0421132e6eaf 53 }
andrewboyson 26:0421132e6eaf 54 if (month >= 10) return false; //Nov, Dec
andrewboyson 26:0421132e6eaf 55 return false;
andrewboyson 26:0421132e6eaf 56 }
andrewboyson 26:0421132e6eaf 57 static void calculateDayOfYearAndWeek(int thisYear, int thisMonth, int thisMonthDay, int* pDayOfYear, int* pDayOfWeek)
andrewboyson 26:0421132e6eaf 58 {
andrewboyson 26:0421132e6eaf 59 int dayOfYear = 0; //1 Jan is day 0
andrewboyson 26:0421132e6eaf 60 int dayOfWeek = 4; //1 Jan 1970 is a Thursday
andrewboyson 26:0421132e6eaf 61
andrewboyson 26:0421132e6eaf 62 //Add days of each whole year
andrewboyson 26:0421132e6eaf 63 for (int y = 70; y < thisYear; y++)
andrewboyson 26:0421132e6eaf 64 {
andrewboyson 26:0421132e6eaf 65 int lengthOfYear = isLeapYear(y) ? 366 : 365;
andrewboyson 26:0421132e6eaf 66 dayOfWeek += lengthOfYear;
andrewboyson 26:0421132e6eaf 67 }
andrewboyson 26:0421132e6eaf 68
andrewboyson 26:0421132e6eaf 69 //Add days of each whole month
andrewboyson 26:0421132e6eaf 70 for (int m = 0; m < thisMonth; m++)
andrewboyson 26:0421132e6eaf 71 {
andrewboyson 26:0421132e6eaf 72 int lengthOfMonth = monthLength(thisYear, m);
andrewboyson 26:0421132e6eaf 73 dayOfYear += lengthOfMonth;
andrewboyson 26:0421132e6eaf 74 dayOfWeek += lengthOfMonth;
andrewboyson 26:0421132e6eaf 75 }
andrewboyson 26:0421132e6eaf 76
andrewboyson 26:0421132e6eaf 77 //Add days of part month
andrewboyson 26:0421132e6eaf 78 thisMonthDay--; //thisMonthDay is 01 to 31 where we need 00 to 30
andrewboyson 26:0421132e6eaf 79 dayOfYear += thisMonthDay;
andrewboyson 26:0421132e6eaf 80 dayOfWeek += thisMonthDay;
andrewboyson 26:0421132e6eaf 81
andrewboyson 26:0421132e6eaf 82 //Update the day of year and day of week parts of the struct tm
andrewboyson 26:0421132e6eaf 83 *pDayOfYear = dayOfYear; // 0 --> 365
andrewboyson 26:0421132e6eaf 84 *pDayOfWeek = dayOfWeek % 7; // 0 --> 6
andrewboyson 26:0421132e6eaf 85 }
andrewboyson 26:0421132e6eaf 86 static void normalise(int* pHours, int* pDayOfWeek, int* pDayOfMonth, int* pMonth, int * pDayOfYear, int* pYear)
andrewboyson 26:0421132e6eaf 87 {
andrewboyson 26:0421132e6eaf 88 if (*pHours > 23)
andrewboyson 26:0421132e6eaf 89 {
andrewboyson 26:0421132e6eaf 90 *pHours -= 24;
andrewboyson 26:0421132e6eaf 91 ++*pDayOfWeek;
andrewboyson 26:0421132e6eaf 92 if (*pDayOfWeek > 6) *pDayOfWeek = 0;
andrewboyson 26:0421132e6eaf 93 ++*pDayOfYear;
andrewboyson 26:0421132e6eaf 94 ++*pDayOfMonth;
andrewboyson 26:0421132e6eaf 95 if (*pDayOfMonth > monthLength(*pYear, *pMonth))
andrewboyson 26:0421132e6eaf 96 {
andrewboyson 26:0421132e6eaf 97 ++*pMonth;
andrewboyson 26:0421132e6eaf 98 if (*pMonth > 11)
andrewboyson 26:0421132e6eaf 99 {
andrewboyson 26:0421132e6eaf 100 ++*pYear;
andrewboyson 26:0421132e6eaf 101 *pDayOfYear = 0;
andrewboyson 26:0421132e6eaf 102 *pMonth = 0;
andrewboyson 26:0421132e6eaf 103 }
andrewboyson 26:0421132e6eaf 104 *pDayOfMonth = 1;
andrewboyson 26:0421132e6eaf 105 }
andrewboyson 26:0421132e6eaf 106 }
andrewboyson 26:0421132e6eaf 107
andrewboyson 26:0421132e6eaf 108 if (*pHours < 0)
andrewboyson 26:0421132e6eaf 109 {
andrewboyson 26:0421132e6eaf 110 *pHours += 24;
andrewboyson 26:0421132e6eaf 111 --*pDayOfWeek;
andrewboyson 26:0421132e6eaf 112 if (*pDayOfWeek < 0) *pDayOfWeek = 6;
andrewboyson 26:0421132e6eaf 113 --*pDayOfYear;
andrewboyson 26:0421132e6eaf 114 --*pDayOfMonth;
andrewboyson 26:0421132e6eaf 115 if (*pDayOfMonth < 1)
andrewboyson 26:0421132e6eaf 116 {
andrewboyson 26:0421132e6eaf 117 --*pMonth;
andrewboyson 26:0421132e6eaf 118 if (*pMonth < 0)
andrewboyson 26:0421132e6eaf 119 {
andrewboyson 26:0421132e6eaf 120 --*pYear;
andrewboyson 26:0421132e6eaf 121 *pDayOfYear = isLeapYear(*pYear) ? 365 : 364;
andrewboyson 26:0421132e6eaf 122 *pMonth = 11;
andrewboyson 26:0421132e6eaf 123 }
andrewboyson 26:0421132e6eaf 124 *pDayOfMonth = monthLength(*pYear, *pMonth);
andrewboyson 26:0421132e6eaf 125 }
andrewboyson 26:0421132e6eaf 126 }
andrewboyson 26:0421132e6eaf 127 }
andrewboyson 26:0421132e6eaf 128 static void addYears(int* pYear, int* pDayOfWeek, int* pDaysLeft)
andrewboyson 26:0421132e6eaf 129 {
andrewboyson 26:0421132e6eaf 130 while(1)
andrewboyson 26:0421132e6eaf 131 {
andrewboyson 26:0421132e6eaf 132 //See if it is a leap year
andrewboyson 26:0421132e6eaf 133 int leapYear = isLeapYear(*pYear);
andrewboyson 26:0421132e6eaf 134
andrewboyson 26:0421132e6eaf 135 //Find the number of days in this year
andrewboyson 26:0421132e6eaf 136 int daysInYear = leapYear ? 366 : 365;
andrewboyson 26:0421132e6eaf 137
andrewboyson 26:0421132e6eaf 138 //Stop if this is the final year
andrewboyson 26:0421132e6eaf 139 if (*pDaysLeft < daysInYear) break;
andrewboyson 26:0421132e6eaf 140
andrewboyson 26:0421132e6eaf 141 //Calculate the current day of the week at the start of the year
andrewboyson 26:0421132e6eaf 142 *pDayOfWeek += leapYear ? 2 : 1;
andrewboyson 26:0421132e6eaf 143 if (*pDayOfWeek >= 7) *pDayOfWeek -= 7;
andrewboyson 26:0421132e6eaf 144
andrewboyson 26:0421132e6eaf 145 //Move on to the next year
andrewboyson 26:0421132e6eaf 146 *pDaysLeft -= daysInYear;
andrewboyson 26:0421132e6eaf 147 ++*pYear;
andrewboyson 26:0421132e6eaf 148 }
andrewboyson 26:0421132e6eaf 149 }
andrewboyson 26:0421132e6eaf 150 static void addMonths(int year, int* pMonth, int* pDaysLeft)
andrewboyson 26:0421132e6eaf 151 {
andrewboyson 26:0421132e6eaf 152 while(1)
andrewboyson 26:0421132e6eaf 153 {
andrewboyson 26:0421132e6eaf 154 int daysInMonth = monthLength(year, *pMonth);
andrewboyson 26:0421132e6eaf 155
andrewboyson 26:0421132e6eaf 156 //Stop if this is the last month
andrewboyson 26:0421132e6eaf 157 if (*pDaysLeft < daysInMonth) break;
andrewboyson 26:0421132e6eaf 158
andrewboyson 26:0421132e6eaf 159 //Move onto next month
andrewboyson 26:0421132e6eaf 160 *pDaysLeft -= daysInMonth;
andrewboyson 26:0421132e6eaf 161 ++*pMonth;
andrewboyson 26:0421132e6eaf 162 }
andrewboyson 26:0421132e6eaf 163 }
andrewboyson 37:330b844f54b6 164 static void timeToTm(int64_t t, struct tm* ptm, bool local)
andrewboyson 26:0421132e6eaf 165 {
andrewboyson 26:0421132e6eaf 166 //Extract the seconds, minutes, hours and days from the time_t t
andrewboyson 26:0421132e6eaf 167 div_t divres;
andrewboyson 26:0421132e6eaf 168 divres = div( t, 60); int seconds = divres.rem;
andrewboyson 26:0421132e6eaf 169 divres = div(divres.quot, 60); int minutes = divres.rem;
andrewboyson 26:0421132e6eaf 170 divres = div(divres.quot, 24); int hours = divres.rem;
andrewboyson 26:0421132e6eaf 171 int daysLeft = divres.quot;
andrewboyson 26:0421132e6eaf 172
andrewboyson 26:0421132e6eaf 173 //Add a year at a time while there is more than a year of days left
andrewboyson 26:0421132e6eaf 174 int year = 70; //Unix epoch is 1970
andrewboyson 26:0421132e6eaf 175 int dayOfWeek = 4; //1 Jan 1970 is a Thursday
andrewboyson 26:0421132e6eaf 176 addYears(&year, &dayOfWeek, &daysLeft);
andrewboyson 26:0421132e6eaf 177
andrewboyson 26:0421132e6eaf 178 //Days left contains the days left from the start (1 Jan) of the current year
andrewboyson 26:0421132e6eaf 179 int dayOfYear = daysLeft;
andrewboyson 26:0421132e6eaf 180 dayOfWeek += daysLeft;
andrewboyson 26:0421132e6eaf 181 dayOfWeek %= 7;
andrewboyson 26:0421132e6eaf 182
andrewboyson 26:0421132e6eaf 183 //Add a month at a time while there is more than a month of days left
andrewboyson 26:0421132e6eaf 184 int month = 0;
andrewboyson 26:0421132e6eaf 185 addMonths(year, &month, &daysLeft);
andrewboyson 26:0421132e6eaf 186
andrewboyson 26:0421132e6eaf 187 //Days left contains the days left from the start (1st) of the current month
andrewboyson 26:0421132e6eaf 188 int dayOfMonth = daysLeft + 1;
andrewboyson 26:0421132e6eaf 189
andrewboyson 26:0421132e6eaf 190 //Deal with local time offsets
andrewboyson 26:0421132e6eaf 191 int dst;
andrewboyson 26:0421132e6eaf 192 if (local)
andrewboyson 26:0421132e6eaf 193 {
andrewboyson 26:0421132e6eaf 194 //Work out if Daylight Saving Time applies
andrewboyson 26:0421132e6eaf 195 dst = isDst(year, month, dayOfMonth, dayOfWeek, hours);
andrewboyson 26:0421132e6eaf 196
andrewboyson 26:0421132e6eaf 197 //Adjust for the timezone
andrewboyson 26:0421132e6eaf 198 hours += dst ? DST_OFFSET : STD_OFFSET;
andrewboyson 26:0421132e6eaf 199 normalise(&hours, &dayOfWeek, &dayOfMonth, &month, &dayOfYear, &year);
andrewboyson 26:0421132e6eaf 200 }
andrewboyson 26:0421132e6eaf 201 else
andrewboyson 26:0421132e6eaf 202 {
andrewboyson 26:0421132e6eaf 203 dst = -1;
andrewboyson 26:0421132e6eaf 204 }
andrewboyson 26:0421132e6eaf 205
andrewboyson 26:0421132e6eaf 206 //Set up the broken time TM structure
andrewboyson 26:0421132e6eaf 207 ptm->tm_sec = seconds; // 00 --> 59
andrewboyson 26:0421132e6eaf 208 ptm->tm_min = minutes; // 00 --> 59
andrewboyson 26:0421132e6eaf 209 ptm->tm_hour = hours; // 00 --> 23
andrewboyson 26:0421132e6eaf 210 ptm->tm_mday = dayOfMonth; // 01 --> 31
andrewboyson 26:0421132e6eaf 211 ptm->tm_mon = month; // 00 --> 11
andrewboyson 26:0421132e6eaf 212 ptm->tm_year = year; // Years since 1900
andrewboyson 26:0421132e6eaf 213 ptm->tm_wday = dayOfWeek; // 0 --> 6 where 0 == Sunday
andrewboyson 26:0421132e6eaf 214 ptm->tm_yday = dayOfYear; // 0 --> 365
andrewboyson 26:0421132e6eaf 215 ptm->tm_isdst = dst; // +ve if DST, 0 if not DSTime, -ve if the information is not available. Note that 'true' evaluates to +1.
andrewboyson 26:0421132e6eaf 216 }
andrewboyson 37:330b844f54b6 217
andrewboyson 37:330b844f54b6 218
andrewboyson 37:330b844f54b6 219 void TmUtcFromSeconds1970(int64_t time, struct tm* ptm)
andrewboyson 26:0421132e6eaf 220 {
andrewboyson 26:0421132e6eaf 221 timeToTm(time, ptm, false);
andrewboyson 26:0421132e6eaf 222 }
andrewboyson 37:330b844f54b6 223 void TmLocalFromSeconds1970(int64_t time, struct tm* ptm)
andrewboyson 26:0421132e6eaf 224 {
andrewboyson 26:0421132e6eaf 225 timeToTm(time, ptm, true);
andrewboyson 26:0421132e6eaf 226 }
andrewboyson 37:330b844f54b6 227 int64_t TmUtcToSeconds1970(struct tm* ptm)
andrewboyson 26:0421132e6eaf 228 {
andrewboyson 37:330b844f54b6 229 int64_t days = 0;
andrewboyson 26:0421132e6eaf 230
andrewboyson 26:0421132e6eaf 231 for (int y = 70; y < ptm->tm_year; y++) days += isLeapYear(y) ? 366 : 365;
andrewboyson 26:0421132e6eaf 232
andrewboyson 26:0421132e6eaf 233 days += ptm->tm_yday;
andrewboyson 26:0421132e6eaf 234
andrewboyson 26:0421132e6eaf 235 return days * 86400 +
andrewboyson 26:0421132e6eaf 236 ptm->tm_hour * 3600 +
andrewboyson 26:0421132e6eaf 237 ptm->tm_min * 60 +
andrewboyson 26:0421132e6eaf 238 ptm->tm_sec;
andrewboyson 26:0421132e6eaf 239 }
andrewboyson 37:330b844f54b6 240
andrewboyson 37:330b844f54b6 241
andrewboyson 31:f6ff7fdb9c67 242 int TmSecondsBetween(struct tm* ptmLater, struct tm* ptmEarlier)
andrewboyson 26:0421132e6eaf 243 {
andrewboyson 26:0421132e6eaf 244 int days = 0;
andrewboyson 26:0421132e6eaf 245
andrewboyson 26:0421132e6eaf 246 if (ptmLater->tm_year > ptmEarlier->tm_year) for (int y = ptmEarlier->tm_year; y < ptmLater->tm_year; y++) days += isLeapYear(y) ? 366 : 365;
andrewboyson 26:0421132e6eaf 247 else for (int y = ptmEarlier->tm_year; y > ptmLater->tm_year; y--) days -= isLeapYear(y) ? 366 : 365;
andrewboyson 26:0421132e6eaf 248
andrewboyson 26:0421132e6eaf 249 days += ptmLater->tm_yday - ptmEarlier->tm_yday;
andrewboyson 26:0421132e6eaf 250
andrewboyson 26:0421132e6eaf 251 return days * 86400 +
andrewboyson 26:0421132e6eaf 252 (ptmLater->tm_hour - ptmEarlier->tm_hour) * 3600 +
andrewboyson 26:0421132e6eaf 253 (ptmLater->tm_min - ptmEarlier->tm_min ) * 60 +
andrewboyson 26:0421132e6eaf 254 (ptmLater->tm_sec - ptmEarlier->tm_sec );
andrewboyson 26:0421132e6eaf 255 }
andrewboyson 26:0421132e6eaf 256
andrewboyson 31:f6ff7fdb9c67 257 void TmUtcToLocal(struct tm* ptm)
andrewboyson 26:0421132e6eaf 258 {
andrewboyson 26:0421132e6eaf 259 //Establish DST
andrewboyson 26:0421132e6eaf 260 ptm->tm_isdst = isDst(ptm->tm_year, ptm->tm_mon, ptm->tm_mday, ptm->tm_wday, ptm->tm_hour);
andrewboyson 26:0421132e6eaf 261
andrewboyson 26:0421132e6eaf 262 //Adjust for the timezone
andrewboyson 26:0421132e6eaf 263 ptm->tm_hour += ptm->tm_isdst ? DST_OFFSET : STD_OFFSET;
andrewboyson 26:0421132e6eaf 264 normalise(&ptm->tm_hour, &ptm->tm_wday, &ptm->tm_mday, &ptm->tm_mon, &ptm->tm_yday, &ptm->tm_year);
andrewboyson 26:0421132e6eaf 265 }
andrewboyson 26:0421132e6eaf 266
andrewboyson 31:f6ff7fdb9c67 267 void TmFromAsciiDateTime(const char* pDate, const char* pTime, struct tm* ptm) // Convert compile time to system time
andrewboyson 26:0421132e6eaf 268 {
andrewboyson 26:0421132e6eaf 269 //__DATE__ The string constant contains eleven characters and looks like "Feb 12 1996". If the day of the month is less than 10, it is padded with a space on the left.
andrewboyson 26:0421132e6eaf 270 char month[5];
andrewboyson 26:0421132e6eaf 271 sscanf(pDate, "%s %d %d", month, &ptm->tm_mday, &ptm->tm_year); ptm->tm_year -= 1900;
andrewboyson 26:0421132e6eaf 272
andrewboyson 26:0421132e6eaf 273 // Find where month is in month_names. Deduce month value.
andrewboyson 26:0421132e6eaf 274 static const char month_names[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
andrewboyson 26:0421132e6eaf 275 ptm->tm_mon = (strstr(month_names, month) - month_names) / 3;
andrewboyson 26:0421132e6eaf 276
andrewboyson 26:0421132e6eaf 277 //__TIME__ The string constant contains eight characters and looks like "23:59:01".
andrewboyson 26:0421132e6eaf 278 sscanf(pTime, "%2d %*c %2d %*c %2d", &ptm->tm_hour, &ptm->tm_min, &ptm->tm_sec);
andrewboyson 26:0421132e6eaf 279
andrewboyson 26:0421132e6eaf 280 //Fill the day of week and the day of year part of the tm structure
andrewboyson 26:0421132e6eaf 281 calculateDayOfYearAndWeek(ptm->tm_year, ptm->tm_mon, ptm->tm_mday, &ptm->tm_yday, &ptm->tm_wday);
andrewboyson 26:0421132e6eaf 282 }
andrewboyson 37:330b844f54b6 283 void TmIncrement(struct tm* ptm)
andrewboyson 37:330b844f54b6 284 {
andrewboyson 37:330b844f54b6 285 ptm->tm_sec++;
andrewboyson 37:330b844f54b6 286 if (ptm->tm_sec > 59)
andrewboyson 37:330b844f54b6 287 {
andrewboyson 37:330b844f54b6 288 ptm->tm_sec = 0;
andrewboyson 37:330b844f54b6 289 ptm->tm_min++;
andrewboyson 37:330b844f54b6 290 }
andrewboyson 37:330b844f54b6 291 if (ptm->tm_min > 59)
andrewboyson 37:330b844f54b6 292 {
andrewboyson 37:330b844f54b6 293 ptm->tm_min = 0;
andrewboyson 37:330b844f54b6 294 ptm->tm_hour++;
andrewboyson 37:330b844f54b6 295 }
andrewboyson 37:330b844f54b6 296 if (ptm->tm_hour > 23)
andrewboyson 37:330b844f54b6 297 {
andrewboyson 37:330b844f54b6 298 ptm->tm_hour = 0;
andrewboyson 37:330b844f54b6 299 ptm->tm_wday++;
andrewboyson 37:330b844f54b6 300 if (ptm->tm_wday > 6) ptm->tm_wday = 0;
andrewboyson 37:330b844f54b6 301 ptm->tm_yday++;
andrewboyson 37:330b844f54b6 302 ptm->tm_mday++;
andrewboyson 37:330b844f54b6 303 if (ptm->tm_mday > monthLength(ptm->tm_year, ptm->tm_mon))
andrewboyson 37:330b844f54b6 304 {
andrewboyson 37:330b844f54b6 305 ptm->tm_mon++;
andrewboyson 37:330b844f54b6 306 if (ptm->tm_mon > 11)
andrewboyson 37:330b844f54b6 307 {
andrewboyson 37:330b844f54b6 308 ptm->tm_year++;
andrewboyson 37:330b844f54b6 309 ptm->tm_yday = 0;
andrewboyson 37:330b844f54b6 310 ptm->tm_mon = 0;
andrewboyson 37:330b844f54b6 311 }
andrewboyson 37:330b844f54b6 312 ptm->tm_mday = 1;
andrewboyson 37:330b844f54b6 313 }
andrewboyson 37:330b844f54b6 314 }
andrewboyson 37:330b844f54b6 315 }