caddr_t
bif_dateadd (caddr_t * qst, caddr_t * err_ret, state_slot_t ** args)
{
caddr_t res;
caddr_t part = bif_string_arg (qst, args, 0, "dateadd");
boxint n = bif_long_arg (qst, args, 1, "dateadd");
caddr_t dt = bif_date_arg (qst, args, 2, "dateadd");
TIMESTAMP_STRUCT ts;
int dt_type = DT_DT_TYPE (dt);
int year_or_month_tz_tweak = (((!strcmp ("year", part)) || (!strcmp ("month", part))) ? DT_TZ (dt) : 0);
DT_AUDIT_FIELDS (dt);
dt_to_GMTimestamp_struct (dt, &ts);
if (year_or_month_tz_tweak)
ts_add (&ts, year_or_month_tz_tweak, "minute");
ts_add (&ts, n, part);
if (year_or_month_tz_tweak)
ts_add (&ts, -year_or_month_tz_tweak, "minute");
res = dk_alloc_box (DT_LENGTH, DV_DATETIME);
GMTimestamp_struct_to_dt (&ts, res);
DT_SET_TZ (res, DT_TZ (dt));
if (DT_TYPE_DATE == dt_type
&& (0 == stricmp (part, "year") || 0 == stricmp (part, "month") || 0 == stricmp (part, "day")))
DT_SET_DT_TYPE (res, dt_type);
DT_AUDIT_FIELDS (dt);
return res;
}
caddr_t
bif_timestampadd (caddr_t * qst, caddr_t * err_ret, state_slot_t ** args)
{
caddr_t res;
ptrlong part = bif_long_arg (qst, args, 0, "timestampadd");
int n = (int) bif_long_arg (qst, args, 1, "timestampadd");
caddr_t dt = bif_date_arg (qst, args, 2, "timestampadd");
int saved_tz = DT_TZ (dt);
GMTIMESTAMP_STRUCT ts;
dt_to_GMTimestamp_struct (dt, &ts);
ts_add (&ts, n, interval_odbc_to_text (part, "timestampadd"));
res = dk_alloc_box (DT_LENGTH, DV_DATETIME);
GMTimestamp_struct_to_dt (&ts, res);
DT_SET_TZ (res, saved_tz);
return res;
}
caddr_t
bif_date_diff (caddr_t * qst, caddr_t * err_ret, state_slot_t ** args)
{
caddr_t unit = bif_string_arg (qst, args, 0, "datediff");
caddr_t dt1 = bif_date_arg (qst, args, 1, "datediff");
caddr_t dt2 = bif_date_arg (qst, args, 2, "datediff");
boxint s1 = (boxint)DT_DAY (dt1) * 24 * 60 * 60 + (boxint)DT_HOUR (dt1) * 60 * 60 + (boxint)DT_MINUTE (dt1) * 60 + DT_SECOND (dt1);
boxint s2 = (boxint)DT_DAY (dt2) * 24 * 60 * 60 + (boxint)DT_HOUR (dt2) * 60 * 60 + (boxint)DT_MINUTE (dt2) * 60 + DT_SECOND (dt2);
int frac1, frac2;
int diffyear, diffmonth;
if (0 == stricmp (unit, "day"))
return box_num ((boxint)DT_DAY (dt2) - (boxint)DT_DAY (dt1));
if (0 == stricmp (unit, "hour"))
return box_num ((s2 - s1) / (60 * 60));
if (0 == stricmp (unit, "minute"))
return box_num ((s2 - s1) / 60);
if (0 == stricmp (unit, "second"))
return box_num (s2 - s1);
diffyear = !stricmp (unit, "year");
diffmonth = (diffyear ? 0 : !stricmp (unit, "month"));
if (diffyear || diffmonth)
{
TIMESTAMP_STRUCT ts1;
TIMESTAMP_STRUCT ts2;
int tz_tweak = DT_TZ (dt1);
dt_to_GMTimestamp_struct (dt2, &ts2);
dt_to_GMTimestamp_struct (dt1, &ts1);
ts_add (&ts1, tz_tweak, "minute");
ts_add (&ts2, tz_tweak, "minute");
if (diffyear)
return box_num ((boxint)ts2.year - (boxint)ts1.year);
if (diffmonth)
return box_num ((boxint)(ts2.year * 12 + ts2.month) - (boxint)(ts1.year * 12 + ts1.month));
}
frac1 = DT_FRACTION(dt1);
frac2 = DT_FRACTION(dt2);
if (0 == stricmp (unit, "millisecond"))
return box_num ((s2 - s1) * (boxint)1000 + (frac2 / 1000000 - frac1 / 1000000));
if (0 == stricmp (unit, "microsecond"))
return box_num ((s2 - s1) * (boxint)1000000 + (frac2 / 1000 - frac1 / 1000));
if (0 == stricmp (unit, "nanosecond"))
return box_num ((s2 - s1) * (boxint)1000000000 + (frac2 - frac1));
sqlr_new_error ("22023", "DT002", "Bad unit in datediff: %s.", unit);
return NULL;
}
caddr_t
bif_timezone (caddr_t * qst, caddr_t * err_ret, state_slot_t ** args)
{
caddr_t arg = bif_date_arg (qst, args, 0, "timezone");
return box_num (DT_TZ (arg));
}
caddr_t
arithm_dt_add_num (ccaddr_t box1, ccaddr_t box2, int subtraction, caddr_t *err_ret)
{
int dt_type = DT_DT_TYPE (box1);
dtp_t dtp2 = DV_TYPE_OF (box2);
boxint whole_seconds = 0;
boxint nanoseconds = 0;
TIMESTAMP_STRUCT ts;
caddr_t res;
switch (dtp2)
{
case DV_LONG_INT:
whole_seconds = unbox (box2);
break;
case DV_DOUBLE_FLOAT:
{
double n = unbox_double (box2);
double rest;
whole_seconds = (n >= 0.0) ? floor(n + 0.5) : ceil(n - 0.5);
rest = n - whole_seconds;
if (abs(rest/n) > (3 * DBL_EPSILON))
nanoseconds = (n - whole_seconds) * 1000000000L;
break;
}
case DV_NUMERIC:
{
numeric_t n = (numeric_t)box2;
if (NUMERIC_STS_SUCCESS != numeric_to_int64 (n, &whole_seconds))
{
err_ret[0] = srv_make_new_error ("22003", "SR087", "Wrong arguments for datetime arithmetic: decimal is out of range.");
return NULL;
}
if (n->n_scale > 0)
{
char *nptr = n->n_value + n->n_len;
int ctr;
int mult = 1;
for (ctr = 9; ctr > n->n_scale; ctr--) mult *= 10;
while (ctr--)
{
nanoseconds += mult * nptr[ctr];
mult *= 10;
}
}
break;
}
default:
return NULL;
}
DT_AUDIT_FIELDS (dt);
dt_to_GMTimestamp_struct (box1, &ts);
ts_add (&ts, (subtraction ? -whole_seconds : whole_seconds), "second");
if (nanoseconds)
ts_add (&ts, (subtraction ? -nanoseconds : nanoseconds), "nanosecond");
res = dk_alloc_box (DT_LENGTH, DV_DATETIME);
GMTimestamp_struct_to_dt (&ts, res);
DT_SET_TZ (res, DT_TZ (box1));
if ((DT_TYPE_DATE == dt_type) && (0 == (((whole_seconds * 1000000000L) + nanoseconds) % (SPERDAY * 1000000000L))))
DT_SET_DT_TYPE (res, dt_type);
DT_AUDIT_FIELDS (dt);
return res;
}
