309 lines
6.4 KiB
C
309 lines
6.4 KiB
C
#include <string.h>
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#include "apps/sntp_time.h"
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s8_t sntp_time_timezone = 8;
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u32_t sntp_time_realtime = 0;
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int sntp_time_month;
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int sntp_time_year;
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char sntp_time_result[100];
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sntp_tm_type sntp_time_rule[2];
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sntp_tm sntp_time_result_buf;
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static const int sntp_time_mon_lengths[2][12] = {
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{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
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{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
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} ;
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static const int sntp_time_year_lengths[2] = {
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365,
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366
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};
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sntp_tm *sntp_mktm_r(const sntp_time_t *tim_p, sntp_tm *res, int is_gmtime)
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{
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long days, rem;
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sntp_time_t lcltime;
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int i;
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int y;
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int yleap;
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const int *ip;
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/* base decision about std/dst time on current time */
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lcltime = *tim_p;
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days = ((long)lcltime) / SECSPERDAY;
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rem = ((long)lcltime) % SECSPERDAY;
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while (rem < 0)
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{
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rem += SECSPERDAY;
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--days;
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}
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while (rem >= SECSPERDAY)
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{
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rem -= SECSPERDAY;
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++days;
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}
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/* compute hour, min, and sec */
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res->tm_hour = (int) (rem / SECSPERHOUR);
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rem %= SECSPERHOUR;
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res->tm_min = (int) (rem / SECSPERMIN);
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res->tm_sec = (int) (rem % SECSPERMIN);
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/* compute day of week */
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if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
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res->tm_wday += DAYSPERWEEK;
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/* compute year & day of year */
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y = EPOCH_YEAR;
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if (days >= 0)
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{
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for (;;)
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{
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yleap = isleap(y);
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if (days < sntp_time_year_lengths[yleap])
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break;
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y++;
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days -= sntp_time_year_lengths[yleap];
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}
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}
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else
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{
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do
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{
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--y;
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yleap = isleap(y);
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days += sntp_time_year_lengths[yleap];
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} while (days < 0);
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}
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res->tm_year = y - YEAR_BASE;
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res->tm_yday = days;
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ip = sntp_time_mon_lengths[yleap];
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for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon)
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days -= ip[res->tm_mon];
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res->tm_mday = days + 1;
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if (!is_gmtime)
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{
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int offset;
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int hours, mins, secs;
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res->tm_isdst = 0;
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offset = (res->tm_isdst == 1 ? sntp_time_rule[1].offset : sntp_time_rule[0].offset);
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hours = offset / SECSPERHOUR;
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offset = offset % SECSPERHOUR;
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mins = offset / SECSPERMIN;
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secs = offset % SECSPERMIN;
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res->tm_sec -= secs;
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res->tm_min -= mins;
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res->tm_hour -= hours;
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if (res->tm_sec >= SECSPERMIN)
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{
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res->tm_min += 1;
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res->tm_sec -= SECSPERMIN;
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}
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else if (res->tm_sec < 0)
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{
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res->tm_min -= 1;
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res->tm_sec += SECSPERMIN;
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}
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if (res->tm_min >= MINSPERHOUR)
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{
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res->tm_hour += 1;
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res->tm_min -= MINSPERHOUR;
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}
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else if (res->tm_min < 0)
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{
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res->tm_hour -= 1;
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res->tm_min += MINSPERHOUR;
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}
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if (res->tm_hour >= HOURSPERDAY)
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{
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++res->tm_yday;
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++res->tm_wday;
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if (res->tm_wday > 6)
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res->tm_wday = 0;
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++res->tm_mday;
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res->tm_hour -= HOURSPERDAY;
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if (res->tm_mday > ip[res->tm_mon])
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{
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res->tm_mday -= ip[res->tm_mon];
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res->tm_mon += 1;
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if (res->tm_mon == 12)
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{
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res->tm_mon = 0;
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res->tm_year += 1;
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res->tm_yday = 0;
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}
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}
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}
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else if (res->tm_hour < 0)
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{
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res->tm_yday -= 1;
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res->tm_wday -= 1;
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if (res->tm_wday < 0)
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res->tm_wday = 6;
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res->tm_mday -= 1;
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res->tm_hour += 24;
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if (res->tm_mday == 0)
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{
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res->tm_mon -= 1;
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if (res->tm_mon < 0)
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{
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res->tm_mon = 11;
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res->tm_year -= 1;
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res->tm_yday = 365 + isleap(res->tm_year);
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}
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res->tm_mday = ip[res->tm_mon];
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}
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}
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}
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else
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res->tm_isdst = 0;
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return (res);
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}
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sntp_tm *sntp_localtime_r(const sntp_time_t *tim_p, sntp_tm *res)
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{
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return sntp_mktm_r (tim_p, res, 0);
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}
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sntp_tm *sntp_localtime(const sntp_time_t *tim_p)
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{
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return sntp_localtime_r (tim_p, &sntp_time_result_buf);
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}
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int sntp_limitstime(int year)
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{
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int days, year_days, years;
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int i, j;
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if (year < EPOCH_YEAR)
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return 0;
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sntp_time_year = year;
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years = (year - EPOCH_YEAR);
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year_days = years * 365 +
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(years - 1 + EPOCH_YEARS_SINCE_LEAP) / 4 - (years - 1 + EPOCH_YEARS_SINCE_CENTURY) / 100 +
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(years - 1 + EPOCH_YEARS_SINCE_LEAP_CENTURY) / 400;
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for (i = 0; i < 2; ++i)
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{
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if (sntp_time_rule[i].ch == 'J')
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days = year_days + sntp_time_rule[i].d + (isleap(year) && sntp_time_rule[i].d >= 60);
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else if (sntp_time_rule[i].ch == 'D')
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days = year_days + sntp_time_rule[i].d;
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else
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{
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int yleap = isleap(year);
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int m_day, m_wday, wday_diff;
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const int *ip = sntp_time_mon_lengths[yleap];
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days = year_days;
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for (j = 1; j < sntp_time_rule[i].m; ++j)
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days += ip[j-1];
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m_wday = (EPOCH_WDAY + days) % DAYSPERWEEK;
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wday_diff = sntp_time_rule[i].d - m_wday;
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if (wday_diff < 0)
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wday_diff += DAYSPERWEEK;
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m_day = (sntp_time_rule[i].n - 1) * DAYSPERWEEK + wday_diff;
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while (m_day >= ip[j-1])
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m_day -= DAYSPERWEEK;
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days += m_day;
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}
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/* store the change-over time in GMT form by adding offset */
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sntp_time_rule[i].change = days * SECSPERDAY + sntp_time_rule[i].s + sntp_time_rule[i].offset;
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}
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sntp_time_month = (sntp_time_rule[0].change < sntp_time_rule[1].change);
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return 1;
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}
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char *sntp_asctime_r(sntp_tm *tim_p ,char *result)
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{
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static const char day_name[7][4] = {
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
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};
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static const char mon_name[12][4] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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sprintf (result, "%s %s %02d %02d:%02d:%02d %02d\n",
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day_name[tim_p->tm_wday],
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mon_name[tim_p->tm_mon],
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tim_p->tm_mday, tim_p->tm_hour, tim_p->tm_min,
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tim_p->tm_sec, 1900 + tim_p->tm_year);
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return result;
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}
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char *sntp_asctime(sntp_tm *tim_p)
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{
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return sntp_asctime_r (tim_p, sntp_time_result);
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}
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u32_t sntp_get_current_timestamp(void)
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{
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if(sntp_time_realtime == 0){
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printf("please start sntp first !\n");
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return 0;
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} else {
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return sntp_time_realtime;
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}
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}
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char* sntp_get_real_time(sntp_time_t t)
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{
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return sntp_asctime(sntp_localtime (&t));
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}
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/**
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* SNTP get sntp_time_timezone default GMT + 8
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*/
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s8_t sntp_get_timezone(void)
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{
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return sntp_time_timezone;
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}
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/**
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* SNTP set sntp_time_timezone default GMT + 8
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*/
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bool sntp_set_timezone(s8_t timezone)
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{
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if(timezone >= -11 && timezone <= 13) {
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sntp_time_timezone = timezone;
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return true;
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} else {
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return false;
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}
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}
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void sntp_inc_time(void)
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{
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sntp_time_realtime ++;
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}
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void sntp_convert_time(sntp_time_t GMT_Time)
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{
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sntp_time_t Local_Time = GMT_Time;
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Local_Time += sntp_time_timezone * 60 * 60;
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sntp_time_realtime = Local_Time;
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printf("%s\n",sntp_asctime(sntp_localtime (&Local_Time)));
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}
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