1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin /* 24*4887Schin * Glenn Fowler 25*4887Schin * AT&T Research 26*4887Schin * 27*4887Schin * Time_t conversion support 28*4887Schin */ 29*4887Schin 30*4887Schin #include <tmx.h> 31*4887Schin 32*4887Schin #include "FEATURE/tmlib" 33*4887Schin 34*4887Schin /* 35*4887Schin * return Tm_t for t 36*4887Schin * time zone and leap seconds accounted for in return value 37*4887Schin */ 38*4887Schin 39*4887Schin Tm_t* 40*4887Schin tmxmake(Time_t t) 41*4887Schin { 42*4887Schin register struct tm* tp; 43*4887Schin register Tm_leap_t* lp; 44*4887Schin Time_t x; 45*4887Schin time_t now; 46*4887Schin int leapsec; 47*4887Schin int y; 48*4887Schin uint32_t n; 49*4887Schin int32_t o; 50*4887Schin #if TMX_FLOAT 51*4887Schin Time_t z; 52*4887Schin uint32_t i; 53*4887Schin #endif 54*4887Schin Tm_t tm; 55*4887Schin 56*4887Schin static Tm_t ts; 57*4887Schin 58*4887Schin tmset(tm_info.zone); 59*4887Schin leapsec = 0; 60*4887Schin if ((tm_info.flags & (TM_ADJUST|TM_LEAP)) == (TM_ADJUST|TM_LEAP) && (n = tmxsec(t))) 61*4887Schin { 62*4887Schin for (lp = &tm_data.leap[0]; n < lp->time; lp++); 63*4887Schin if (lp->total) 64*4887Schin { 65*4887Schin if (n == lp->time && (leapsec = (lp->total - (lp+1)->total)) < 0) 66*4887Schin leapsec = 0; 67*4887Schin t = tmxsns(n - lp->total, tmxnsec(t)); 68*4887Schin } 69*4887Schin } 70*4887Schin x = tmxsec(t); 71*4887Schin if (tm_info.flags & TM_UTC) 72*4887Schin { 73*4887Schin tm.tm_zone = &tm_data.zone[2]; 74*4887Schin o = 0; 75*4887Schin } 76*4887Schin else 77*4887Schin { 78*4887Schin tm.tm_zone = tm_info.zone; 79*4887Schin o = 60 * tm.tm_zone->west; 80*4887Schin if (x > o) 81*4887Schin { 82*4887Schin x -= o; 83*4887Schin o = 0; 84*4887Schin } 85*4887Schin } 86*4887Schin #if TMX_FLOAT 87*4887Schin i = x / (24 * 60 * 60); 88*4887Schin z = i; 89*4887Schin n = x - z * (24 * 60 * 60); 90*4887Schin tm.tm_sec = n % 60 + leapsec; 91*4887Schin n /= 60; 92*4887Schin tm.tm_min = n % 60; 93*4887Schin n /= 60; 94*4887Schin tm.tm_hour = n % 24; 95*4887Schin #define x i 96*4887Schin #else 97*4887Schin tm.tm_sec = x % 60 + leapsec; 98*4887Schin x /= 60; 99*4887Schin tm.tm_min = x % 60; 100*4887Schin x /= 60; 101*4887Schin tm.tm_hour = x % 24; 102*4887Schin x /= 24; 103*4887Schin #endif 104*4887Schin tm.tm_wday = (x + 4) % 7; 105*4887Schin tm.tm_year = (400 * (x + 25202)) / 146097 + 1; 106*4887Schin n = tm.tm_year - 1; 107*4887Schin x -= n * 365 + n / 4 - n / 100 + (n + (1900 - 1600)) / 400 - (1970 - 1901) * 365 - (1970 - 1901) / 4; 108*4887Schin tm.tm_mon = 0; 109*4887Schin tm.tm_mday = x + 1; 110*4887Schin tmfix(&tm); 111*4887Schin n += 1900; 112*4887Schin tm.tm_isdst = 0; 113*4887Schin if (tm.tm_zone->daylight) 114*4887Schin { 115*4887Schin if ((y = tmequiv(&tm) - 1900) == tm.tm_year) 116*4887Schin now = tmxsec(t); 117*4887Schin else 118*4887Schin { 119*4887Schin Tm_t te; 120*4887Schin 121*4887Schin te = tm; 122*4887Schin te.tm_year = y; 123*4887Schin now = tmxsec(tmxtime(&te, tm.tm_zone->west)); 124*4887Schin } 125*4887Schin if ((tp = tmlocaltime(&now)) && ((tm.tm_isdst = tp->tm_isdst) || o)) 126*4887Schin { 127*4887Schin tm.tm_min -= o / 60 + (tm.tm_isdst ? tm.tm_zone->dst : 0); 128*4887Schin tmfix(&tm); 129*4887Schin } 130*4887Schin } 131*4887Schin tm.tm_nsec = tmxnsec(t); 132*4887Schin ts = tm; 133*4887Schin return &ts; 134*4887Schin } 135