#if 0 #include <time.h> /* This is a translation from ALGOL in Collected Algorithms of CACM. */ /* Copied from Algorithm 199, Author: Robert G. Tantzen */ void __tm_conv(tmbuf, timep, offset) struct tm *tmbuf; time_t *timep; time_t offset; { static int moffset[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; long s; long j, d, m, y; offset += *timep; tmbuf->tm_isdst = 0; /* Someone else can set this */ j = offset / 86400L + 719469; s = offset % 86400L; if (s < 0) { s += 86400L; j--; } tmbuf->tm_sec = s % 60; tmbuf->tm_min = (s / 60) % 60; tmbuf->tm_hour = s / 3600; tmbuf->tm_wday = (j + 2) % 7; /* * Julian date converter. Takes a julian date (the number of days since * some distant epoch or other), and fills tmbuf. */ y = (4L * j - 1L) / 146097L; j = 4L * j - 1L - 146097L * y; d = j / 4L; j = (4L * d + 3L) / 1461L; d = 4L * d + 3L - 1461L * j; d = (d + 4L) / 4L; m = (5L * d - 3L) / 153L; d = 5L * d - 3 - 153L * m; d = (d + 5L) / 5L; y = 100L * y + j; if (m < 10) m += 2; else { m -= 10; ++y; } tmbuf->tm_year = y - 1900; tmbuf->tm_mon = m; tmbuf->tm_mday = d; tmbuf->tm_yday = d + moffset[m]; if (m > 1 && ((y) % 4 == 0 && ((y) % 100 != 0 || (y) % 400 == 0))) tmbuf->tm_yday++; } #else /* This is adapted from glibc */ /* Copyright (C) 1991, 1993 Free Software Foundation, Inc */ #define SECS_PER_HOUR 3600L #define SECS_PER_DAY 86400L #include <time.h> static const unsigned short int __mon_lengths[2][12] = { /* Normal years. */ {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, /* Leap years. */ {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} }; /* This global is exported to the wide world in keeping * with the interface in time.h */ long int timezone; void __tm_conv(tmbuf, t, offset) struct tm *tmbuf; time_t *t; time_t offset; { long days, rem; register int y; register const unsigned short int *ip; timezone = -offset; days = *t / SECS_PER_DAY; rem = *t % SECS_PER_DAY; rem += offset; while (rem < 0) { rem += SECS_PER_DAY; --days; } while (rem >= SECS_PER_DAY) { rem -= SECS_PER_DAY; ++days; } tmbuf->tm_hour = rem / SECS_PER_HOUR; rem %= SECS_PER_HOUR; tmbuf->tm_min = rem / 60; tmbuf->tm_sec = rem % 60; /* January 1, 1970 was a Thursday. */ tmbuf->tm_wday = (4 + days) % 7; if (tmbuf->tm_wday < 0) tmbuf->tm_wday += 7; y = 1970; while (days >= (rem = __isleap(y) ? 366 : 365)) { ++y; days -= rem; } while (days < 0) { --y; days += __isleap(y) ? 366 : 365; } tmbuf->tm_year = y - 1900; tmbuf->tm_yday = days; ip = __mon_lengths[__isleap(y)]; for (y = 0; days >= ip[y]; ++y) days -= ip[y]; tmbuf->tm_mon = y; tmbuf->tm_mday = days + 1; tmbuf->tm_isdst = -1; } #endif