539 lines
15 KiB
C++
539 lines
15 KiB
C++
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/* Time and date functions */
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/* Copyright (c) Mix Software 1988 */
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char *ctime(time)
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long time;
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{
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char *asctime();
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struct tm *localtime();
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return asctime(localtime(time));
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} /* ctime */
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size_t strftime(s, maxsize, format, timeptr)
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char *s; /* buffer for result */
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size_t maxsize; /* maximum size of s */
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char *format; /* format string */
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struct tm *timeptr; /* time to convert */
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{ /* formatted time */
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static char *shortday[7] = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
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static char *longday[7] = {"Sunday","Monday","Tuesday","Wednesday",
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"Thursday","Friday","Saturday"};
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static char *shortmonth[12] = {"Jan","Feb","Mar","Apr","May","Jun",
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"Jul","Aug","Sep","Oct","Nov","Dec"};
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static char *longmonth[12] = {"January","February","March","April",
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"May","June","July","August","September",
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"October","November","December"};
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static char *am_pm[2] = {"AM","PM"};
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static int _strput(int, char *, int);
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char *asctime();
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extern char *tzname[2];
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#define put(ch) {if (--length) *s++ = ch; else return 0;}
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char ch, *p;
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char str[20];
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int length = maxsize;
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int value;
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while (*format != '\0') {
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if (*format != '%') put(*format++)
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else {
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p = str;
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memset(p,0,sizeof(str));
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switch (*++format) {
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case 'a' :
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p = shortday[timeptr->tm_wday];
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break;
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case 'A' :
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p = longday[timeptr->tm_wday];
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break;
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case 'b' :
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p = shortmonth[timeptr->tm_mon];
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break;
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case 'B' :
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p = longmonth[timeptr->tm_mon];
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break;
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case 'c' :
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p = asctime(timeptr);
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break;
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case 'd' :
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_asct2dig(timeptr->tm_mday,p);
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break;
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case 'H' :
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_asct2dig(timeptr->tm_hour,p);
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break;
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case 'I' :
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value = timeptr->tm_hour;
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if (value > 12) value -= 12;
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_asct2dig(value,p);
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break;
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case 'j' :
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case 'J' :
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_asct3dig(timeptr->tm_yday,p);
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break;
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case 'm' :
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_asct2dig(timeptr->tm_mon+1,p);
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break;
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case 'M' :
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_asct2dig(timeptr->tm_min,p);
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break;
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case 'p' :
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p = am_pm[timeptr->tm_hour / 12];
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break;
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case 'S' :
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_asct2dig(timeptr->tm_sec,p);
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break;
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case 'U' :
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value = timeptr->tm_wday - (timeptr->tm_yday % 7);
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if (value < 0) value += 7; /* week day of Jan 1 */
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value = (timeptr->tm_yday + value - 1) / 7;
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_asct2dig(value,p);
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break;
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case 'w' :
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*p = timeptr->tm_wday + '0';
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break;
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case 'W' :
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value = timeptr->tm_wday - (timeptr->tm_yday % 7);
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if (value < 0) value += 7; /* week day of Jan 1 */
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value = (timeptr->tm_yday + value) / 7;
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_asct2dig(value,p);
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break;
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case 'x' :
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_asct2dig(timeptr->tm_mon+1,str);
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_asct2dig(timeptr->tm_mday,&str[3]);
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_asct2dig(timeptr->tm_year % 100,&str[6]);
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str[2] = '/';
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str[5] = '/';
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break;
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case 'X' :
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_asct2dig(timeptr->tm_hour,str);
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_asct2dig(timeptr->tm_min,&str[3]);
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_asct2dig(timeptr->tm_sec % 100,&str[6]);
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str[2] = ':';
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str[5] = ':';
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break;
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case 'y' :
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_asct2dig(timeptr->tm_year % 100,p);
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break;
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case 'Y' :
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_asct2dig(timeptr->tm_year / 100,str);
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_asct2dig(timeptr->tm_year % 100,&str[2]);
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break;
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case 'Z' :
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if (timeptr->tm_isdst) p = tzname[1]; else p = tzname[0];
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if (p == NULL) p = str;
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break;
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case '%' :
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*p = '%';
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break;
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} /* switch */
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while (*p != '\0') put(*p++)
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++format;
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} /* '%' */
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} /* while */
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*s = '\0';
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return maxsize - length;
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#undef put
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} /* strftime */
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char *asctime(time)
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struct tm *time;
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{ /* convert time to a character string */
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static char *monthname[13] = {"Jan","Feb","Mar","Apr","May","Jun",
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"Jul","Aug","Sep","Oct","Nov","Dec"};
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static char *dayname[7] = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
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static char timebuf[26];
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int yy;
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strcpy(timebuf,"www mmm dd hh:mm:ss yyyy\n");
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memcpy(timebuf,dayname[time->tm_wday],3);
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memcpy(&timebuf[4],monthname[time->tm_mon],3);
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_asct2dig(time->tm_mday,&timebuf[8]);
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_asct2dig(time->tm_hour,&timebuf[11]);
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_asct2dig(time->tm_min,&timebuf[14]);
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_asct2dig(time->tm_sec,&timebuf[17]);
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yy = time->tm_year < 100 ? 19 : 20;
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_asct2dig(yy,&timebuf[20]);
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_asct2dig(time->tm_year % 100,&timebuf[22]);
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return timebuf;
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} /* asctime */
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_asct2dig(n, p)
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int n;
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char *p;
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{
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*p++ = (n / 10) + '0';
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*p = (n % 10) + '0';
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}
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_asct3dig(n, p)
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int n;
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char *p;
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{
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*p++ = (n / 100) + '0';
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n = n % 100;
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*p++ = (n / 10) + '0';
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*p = (n % 10) + '0';
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}
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time_t mktime(timeptr)
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struct tm *timeptr;
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{
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long _timesec(int, int, int, int, int, int);
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struct tm *localtime();
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struct tm *_timecvt(time_t);
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time_t t;
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t = _timesec(timeptr->tm_year+1900, timeptr->tm_mon+1, timeptr->tm_mday,
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timeptr->tm_hour, timeptr->tm_min, timeptr->tm_sec);
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*timeptr = *localtime(&t);
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return t;
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}
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int stime(tp) /* set time */
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long *tp;
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{
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struct tm *t;
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union REGS time, date;
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t = localtime(tp);
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time.h.ah = 0x2d;
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time.h.ch = t->tm_hour;
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time.h.cl = t->tm_min;
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time.h.dh = t->tm_sec;
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time.h.dl = 0;
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date.h.ah = 0x2b;
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date.x.cx = t->tm_year+1900;
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date.h.dh = t->tm_mon+1;
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date.h.dl = t->tm_mday;
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intdos(&date,&date);
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intdos(&time,&time);
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return 0;
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}
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struct utimbuf {
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time_t actime; /* access time */
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time_t modtime; /* modification time */
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};
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int utime(filename, times)
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char *filename;
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struct utimbuf *times;
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{
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extern int _doserrno, errno;
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union REGS r;
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struct tm *localtime(time_t *), *tptr;
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union {
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struct ftime time;
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struct {
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int time;
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int date;
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} i;
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} filetime;
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time_t t, time();
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int handle;
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int status;
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if (times == NULL) t = time(NULL); else t = times->modtime;
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tptr = localtime(&t);
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if (_sys_ad(0x3d00,filename,&handle) != 0)
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{ errno = _doserrno; return -1; }
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if (tptr->tm_year < 80) filetime.time.ft_year = 0;
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else filetime.time.ft_year = tptr->tm_year-80;
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filetime.time.ft_month = tptr->tm_mon+1;
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filetime.time.ft_day = tptr->tm_mday;
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if (tptr->tm_hour < 0) filetime.time.ft_hour = 0;
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else filetime.time.ft_hour = tptr->tm_hour;
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filetime.time.ft_min = tptr->tm_min;
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filetime.time.ft_tsec = tptr->tm_sec >> 1;
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r.x.ax = 0x5701;
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r.x.bx = handle;
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if (_sysabcd(0x5701,handle,filetime.i.time,filetime.i.date,&status) != 0) {
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errno = _doserrno;
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_sys_ab(0x3e00,handle,&handle);
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return -1;
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}
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_sys_ab(0x3e00,handle,&handle);
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return 0;
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}
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struct tm *gmtime(time)
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long *time;
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{
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struct tm *_timecvt();
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return _timecvt(*time);
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} /* gmtime */
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struct tm *localtime(time)
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long *time;
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{
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extern long timezone;
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extern int daylight;
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void tzset();
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struct tm *_timecvt();
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static tzdone = 0;
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if (tzdone == 0) {tzset(); tzdone = 1; }
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if (daylight) return _timecvt(*time-timezone+3600);
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return _timecvt(*time-timezone);
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} /* localtime */
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void unixtodos(utime, dateptr, timeptr)
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long utime;
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struct date *dateptr;
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struct time *timeptr;
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{
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extern struct tm *_timecvt();
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extern long timezone;
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extern int daylight;
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struct tm *t;
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long localtime;
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localtime = utime - timezone;
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if (daylight) localtime += 3600l;
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t = _timecvt(localtime);
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dateptr->da_year = t->tm_year + 1900;
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dateptr->da_mon = t->tm_mon+1;
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dateptr->da_day = t->tm_mday;
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timeptr->ti_hour = t->tm_hour;
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timeptr->ti_min = t->tm_min;
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timeptr->ti_sec = t->tm_sec;
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timeptr->ti_hund = 0;
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}
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struct tm *_timecvt(time)
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long time;
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{ /* convert binary time to greenwich mean time */
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static struct tm gm;
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static int daypermonth[12] = {31, 28, 31, 30, 31, 30,
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31, 31, 30, 31, 30, 31};
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extern int daylight;
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long secs, days;
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int years, leaps, dayofyear;
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int month = 0;
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int *mptr = daypermonth;
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days = time / 86400;
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years = days/365;
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leaps = (years+1) / 4;
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dayofyear = days - (long)years * 365 - (long)leaps;
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if (dayofyear < 0) {
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years--;
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dayofyear += 365;
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}
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gm.tm_yday = dayofyear;
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gm.tm_year = years+70;
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if ((years % 4) == 2) daypermonth[1] = 29; else daypermonth[1] = 28;
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while (dayofyear > *mptr) {
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++month;
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dayofyear -= *mptr++;
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}
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gm.tm_mon = month;
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gm.tm_mday = dayofyear+1;
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gm.tm_wday = (days + 4) % 7;
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secs = time - days*86400;
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gm.tm_hour = secs / 3600;
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secs -= (gm.tm_hour * 3600L);
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gm.tm_min = secs / 60;
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gm.tm_sec = secs - (gm.tm_min * 60);
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gm.tm_isdst = daylight;
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return &gm;
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} /* _timecvt */
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void ftime(timeptr)
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struct timeb *timeptr;
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{
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long _timesec();
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void tzset();
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extern long timezone;
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extern int daylight;
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union REGS timecall, datecall;
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union REGS time, date1, date2;
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tzset();
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timecall.h.ah = 0x2c;
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datecall.h.ah = 0x2a;
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intdos(&datecall,&date1);
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intdos(&timecall,&time);
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intdos(&datecall,&date2);
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if (date2.x.dx != date1.x.dx) { /* date change at midnight */
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if (time.h.ch != 23) { /* date already changed when time read */
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date1.x.cx = date2.x.cx;
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date1.x.dx = date2.x.dx;
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}
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}
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timeptr->time = _timesec(date1.x.cx, date1.h.dh, date1.h.dl,
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time.h.ch, time.h.cl, time.h.dh);
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timeptr->millitm = time.h.dl*10;
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timeptr->timezone = timezone/60;
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timeptr->dstflag = daylight;
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} /* ftime */
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||
|
|
unsigned sleep(seconds)
|
||
|
|
unsigned seconds;
|
||
|
|
{ /* suspend execution */
|
||
|
|
long time();
|
||
|
|
long start, now;
|
||
|
|
start = time(NULL);
|
||
|
|
do {
|
||
|
|
now = time(NULL);
|
||
|
|
} while ((now-start) < seconds);
|
||
|
|
}
|
||
|
|
|
||
|
|
long time(timeptr)
|
||
|
|
long *timeptr;
|
||
|
|
{
|
||
|
|
long _timesec();
|
||
|
|
long curtime;
|
||
|
|
union REGS timecall, datecall;
|
||
|
|
union REGS time, date1, date2;
|
||
|
|
timecall.h.ah = 0x2c;
|
||
|
|
datecall.h.ah = 0x2a;
|
||
|
|
intdos(&datecall,&date1);
|
||
|
|
intdos(&timecall,&time);
|
||
|
|
intdos(&datecall,&date2);
|
||
|
|
if (date2.x.dx != date1.x.dx) { /* date change at midnight */
|
||
|
|
if (time.h.ch != 23) { /* date already changed when time read */
|
||
|
|
date1.x.cx = date2.x.cx;
|
||
|
|
date1.x.dx = date2.x.dx;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
curtime = _timesec(date1.x.cx, date1.h.dh, date1.h.dl,
|
||
|
|
time.h.ch, time.h.cl, time.h.dh);
|
||
|
|
if (timeptr != NULL) *timeptr = curtime;
|
||
|
|
return curtime;
|
||
|
|
} /* time */
|
||
|
|
|
||
|
|
long dostounix(dateptr, timeptr)
|
||
|
|
struct date *dateptr;
|
||
|
|
struct time *timeptr;
|
||
|
|
{
|
||
|
|
long _timesec();
|
||
|
|
return _timesec(dateptr->da_year,dateptr->da_mon,dateptr->da_day,
|
||
|
|
timeptr->ti_hour, timeptr->ti_min, timeptr->ti_sec);
|
||
|
|
}
|
||
|
|
|
||
|
|
clock_t clock(void)
|
||
|
|
{
|
||
|
|
extern struct {
|
||
|
|
unsigned int year;
|
||
|
|
unsigned char day;
|
||
|
|
unsigned char month;
|
||
|
|
unsigned char hour;
|
||
|
|
unsigned char minute;
|
||
|
|
unsigned char hour;
|
||
|
|
unsigned char hundredth;
|
||
|
|
unsigned char second;
|
||
|
|
} $$CLOCK; /* time when process started */
|
||
|
|
long time;
|
||
|
|
union REGS t, d;
|
||
|
|
t.h.ah = 0x2c;
|
||
|
|
d.h.ah = 0x2a;
|
||
|
|
intdos(&d,&d);
|
||
|
|
intdos(&t,&t);
|
||
|
|
time = _timesec(d.x.cx,d.h.dh,d.h.dl,t.h.cl,t.h.ch,t.h.dh);
|
||
|
|
time = time - _timesec($$CLOCK.year,$$CLOCK.month,$$CLOCK.day,
|
||
|
|
$$CLOCK.hour,$$CLOCK.minute,$$CLOCK.second);
|
||
|
|
return time*100+t.h.dl-$$CLOCK.hundredth;
|
||
|
|
}
|
||
|
|
|
||
|
|
long _timesec(year, month, day, hour, min, sec)
|
||
|
|
int year, month, day, hour, min, sec;
|
||
|
|
{ /* convert time to seconds since Jan 1 1970 */
|
||
|
|
extern long timezone;
|
||
|
|
extern int daylight;
|
||
|
|
static int daypermonth[13] = {0, 0, 31, 28+31,
|
||
|
|
31+59, 30+31+59, 31+30+31+59,
|
||
|
|
30+151, 31+30+151, 31+31+30+151,
|
||
|
|
30+243, 31+30+243, 30+31+30+243};
|
||
|
|
int years, leaps;
|
||
|
|
long days, secs;
|
||
|
|
years = year - 1970;
|
||
|
|
leaps = (years + 1) / 4;
|
||
|
|
if (((years % 4) == 2) && (month > 2)) ++leaps;
|
||
|
|
days = (long)years*365 + (long)leaps + (long)daypermonth[month]
|
||
|
|
+ (long)(day-1);
|
||
|
|
secs = days*86400 + (long)hour*3600 + (long)min*60 + (long)sec + timezone;
|
||
|
|
if (daylight) return (secs-3600);
|
||
|
|
return secs;
|
||
|
|
} /* _timesec */
|
||
|
|
|
||
|
|
void tzset()
|
||
|
|
{
|
||
|
|
extern int daylight;
|
||
|
|
extern long timezone;
|
||
|
|
extern char *tzname[2];
|
||
|
|
char *tz;
|
||
|
|
int onehour = 3600;
|
||
|
|
tz = getenv("TZ=");
|
||
|
|
if (tz != NULL) {
|
||
|
|
strncpy(tzname[0],tz,3);
|
||
|
|
if (strlen(tz) > 3) {
|
||
|
|
tz += 3;
|
||
|
|
if (*tz == '-') {
|
||
|
|
onehour = -onehour;
|
||
|
|
++tz;
|
||
|
|
}
|
||
|
|
timezone = 0;
|
||
|
|
while (isdigit(*tz)) {
|
||
|
|
timezone = timezone*10 + (long)onehour*(long)(*tz - '0');
|
||
|
|
++tz;
|
||
|
|
}
|
||
|
|
if (*tz) daylight = 1; else daylight = 0;
|
||
|
|
strncpy(tzname[1],tz,3);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
timezone = 0;
|
||
|
|
daylight = 0;
|
||
|
|
*tzname[1] = '\0';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} /* tzset */
|
||
|
|
|
||
|
|
double difftime(time2,time1)
|
||
|
|
time_t time1, time2;
|
||
|
|
{
|
||
|
|
return time2-time1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int daylight = 1;
|
||
|
|
long timezone = 28800;
|
||
|
|
char *tzname[2] = {"PST", "PDT"};
|
||
|
|
|
||
|
|
void getdate(dateblk)
|
||
|
|
struct date *dateblk;
|
||
|
|
{
|
||
|
|
union REGS r;
|
||
|
|
r.h.ah = 0x2a;
|
||
|
|
intdos(&r,&r);
|
||
|
|
dateblk->da_year = r.x.cx;
|
||
|
|
dateblk->da_mon = r.h.dh;
|
||
|
|
dateblk->da_day = r.h.dl;
|
||
|
|
}
|
||
|
|
|
||
|
|
void gettime(timep)
|
||
|
|
struct time *timep;
|
||
|
|
{
|
||
|
|
union REGS r;
|
||
|
|
r.h.ah = 0x2c;
|
||
|
|
intdos(&r,&r);
|
||
|
|
timep->ti_min = r.h.cl;
|
||
|
|
timep->ti_hour = r.h.ch;
|
||
|
|
timep->ti_hund = r.h.dl;
|
||
|
|
timep->ti_sec = r.h.dh;
|
||
|
|
}
|
||
|
|
|
||
|
|
void setdate(dateblk)
|
||
|
|
struct date *dateblk;
|
||
|
|
{
|
||
|
|
union REGS r;
|
||
|
|
r.x.cx = dateblk->da_year;
|
||
|
|
r.h.dh = dateblk->da_mon;
|
||
|
|
r.h.dl = dateblk->da_day;
|
||
|
|
r.h.ah = 0x2b;
|
||
|
|
intdos(&r,&r);
|
||
|
|
}
|
||
|
|
|
||
|
|
void settime(timep)
|
||
|
|
struct time *timep;
|
||
|
|
{
|
||
|
|
union REGS r;
|
||
|
|
r.h.cl = timep->ti_min;
|
||
|
|
r.h.ch = timep->ti_hour;
|
||
|
|
r.h.dl = timep->ti_hund;
|
||
|
|
r.h.dh = timep->ti_sec;
|
||
|
|
r.h.ah = 0x2d;
|
||
|
|
intdos(&r,&r);
|
||
|
|
}
|
||
|
|
|