profuse/Pascal/Date.cpp

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#include <Pascal/Date.h>
#include <cstring>
using namespace Pascal;
Date::Date(unsigned val)
{
// yyyy yyym mmmm dddd
_month = val & 0xf;
_day = (val >> 4) & 0x1f;
_year = (val >> 9) & 0x7f;
}
Date::operator std::time_t() const {
struct tm tm;
if (_day == 0 || _month == 0) return (std::time_t)-1;
std::memset(&tm, 0, sizeof(tm));
tm.tm_hour = 12;
tm.tm_mday = _day;
tm.tm_mon = _month;
tm.tm_year = _year;
tm.tm_isdst = -1;
// ProDOS standard for dealing w/ y2k.
if (_year <= 39) tm.tm_year += 100;
return std::mktime(&tm);
}
Date::operator uint16_t() const {
// year must be 0 .. 127
return (_year << 9) | (_day << 4) | _month;
}
Date Date::Today()
{
struct tm tm;
std::time_t t = std::time(NULL);
::localtime_r(&t, &tm);
return Date(tm.tm_year % 100, tm.tm_mon + 1, tm.tm_mday);
}