4  * SPDX-License-Identifier: Apache-2.0
23  * This converts integral seconds since (before) 1970-01-01T00:00:00
35 static void time_civil_from_days(bigint_type z,  in time_civil_from_days()  argument
38 	tp->tm_wday = (z >= -4) ? ((z + 4) % 7) : ((z + 5) % 7 + 6);  in time_civil_from_days()
39 	z += 719468;  in time_civil_from_days()
41 	bigint_type era = ((z >= 0) ? z : (z - 146096)) / 146097;  in time_civil_from_days()
42 	unsigned int doe = (z - era * (bigint_type)146097);  in time_civil_from_days()
43 	unsigned int yoe = (doe - doe / 1460U + doe / 36524U - doe / 146096U)  in time_civil_from_days()
46 	unsigned int doy = doe - (365U * yoe + yoe / 4U - yoe / 100U);  in time_civil_from_days()
48 	unsigned int d = doy - (153U * mp + 2U) / 5U + 1U;  in time_civil_from_days()
49 	unsigned int m = mp + ((mp < 10) ? 3 : -9);  in time_civil_from_days()
51 	tp->tm_year = y + (m <= 2) - 1900;  in time_civil_from_days()
52 	tp->tm_mon = m - 1;  in time_civil_from_days()
53 	tp->tm_mday = d;  in time_civil_from_days()
56 	 * doy is relative to --03-01 and we need it relative to  in time_civil_from_days()
57 	 * --01-01.  in time_civil_from_days()
59 	 * doy=306 corresponds to --01-01, doy=364 to --02-28, and  in time_civil_from_days()
60 	 * doy=365 to --02-29.  So we can just subtract 306 to handle  in time_civil_from_days()
64 	 * --03-01, which is 59 in a common year and 60 in a leap  in time_civil_from_days()
68 		tp->tm_yday = doy - 306U;  in time_civil_from_days()
70 		tp->tm_yday = doy + 59U + (((yoe % 4U == 0U) && (yoe % 100U != 0U)) || (yoe == 0U));  in time_civil_from_days()
76  * This converts integral seconds since (before) 1970-01-01T00:00:00
84 	time_t z = *timep;  in gmtime_r()  local
85 	bigint_type days = (z >= 0 ? z : z - 86399) / 86400;  in gmtime_r()
86 	unsigned int rem = z - days * 86400;  in gmtime_r()
92 	result->tm_hour = rem / 60U / 60U;  in gmtime_r()
93 	rem -= result->tm_hour * 60 * 60;  in gmtime_r()
94 	result->tm_min = rem / 60;  in gmtime_r()
95 	result->tm_sec = rem - result->tm_min * 60;  in gmtime_r()