marshal_load

/*
 * undocumented
 */

static VALUE
time_mload(time, str)
    VALUE time, str;
{
    struct time_object *tobj;
    unsigned long p, s;
    time_t sec, usec;
    unsigned char *buf;
    struct tm tm;
    int i;

    time_modify(time);
    StringValue(str);
    buf = (unsigned char *)RSTRING(str)->ptr;
    if (RSTRING(str)->len != 8) {
        rb_raise(rb_eTypeError, "marshaled time format differ");
    }

    p = s = 0;
    for (i=0; i<4; i++) {
        p |= buf[i]<<(8*i);
    }
    for (i=4; i<8; i++) {
        s |= buf[i]<<(8*(i-4));
    }

    if ((p & (1UL<<31)) == 0) {
        sec = p;
        usec = s;
    }
    else {
       p &= ~(1UL<<31);
        tm.tm_year = (p >> 14) & 0xffff;
        tm.tm_mon  = (p >> 10) & 0xf;
        tm.tm_mday = (p >>  5) & 0x1f;
        tm.tm_hour =  p        & 0x1f;
        tm.tm_min  = (s >> 26) & 0x3f;
        tm.tm_sec  = (s >> 20) & 0x3f;
        tm.tm_isdst = 0;

        sec = make_time_t(&tm, Qtrue);
        usec = (time_t)(s & 0xfffff);
    }
    time_overflow_p(&sec, &usec);

    GetTimeval(time, tobj);
    tobj->tm_got = 0;
    tobj->tv.tv_sec = sec;
    tobj->tv.tv_usec = usec;
    return time;
}