/* Translate divisors into multiples of smaller units*/
static int _convert_divisor_to_multiple(NpyArray_DateTimeInfo dtinfo)
{
int i, num, ind;
int [] totry;
NPY_DATETIMEUNIT [] baseunit = new NPY_DATETIMEUNIT[2];
int q = 0;
int r;
ind = ((int)dtinfo._base - (int)NPY_DATETIMEUNIT.NPY_FR_Y) * 2;
totry = (int [])_multiples_table[ind];
baseunit = (NPY_DATETIMEUNIT [])_multiples_table[ind + 1];
num = 3;
if (dtinfo._base == NPY_DATETIMEUNIT.NPY_FR_W)
{
num = 4;
}
else if (dtinfo._base > NPY_DATETIMEUNIT.NPY_FR_D)
{
num = 2;
}
if (dtinfo._base >= NPY_DATETIMEUNIT.NPY_FR_s)
{
ind = ((int)NPY_DATETIMEUNIT.NPY_FR_s - (int)NPY_DATETIMEUNIT.NPY_FR_Y) * 2;
totry = (int[])_multiples_table[ind];
baseunit = (NPY_DATETIMEUNIT[])_multiples_table[ind + 1];
baseunit[0] = dtinfo._base + 1;
baseunit[1] = dtinfo._base + 2;
if (dtinfo._base == NPY_DATETIMEUNIT.NPY_DATETIME_NUMUNITS - 2)
{
num = 1;
}
if (dtinfo._base == NPY_DATETIMEUNIT.NPY_DATETIME_NUMUNITS - 1)
{
num = 0;
}
}
for (i = 0; i < num; i++)
{
q = totry[i] / dtinfo.den;
r = totry[i] % dtinfo.den;
if (r == 0)
{
break;
}
}
if (i == num)
{
string msg = string.Format("divisor ({0}) is not a multiple of a lower-unit", dtinfo.den);
NpyErr_SetString(npyexc_type.NpyExc_ValueError, msg);
return(-1);
}
dtinfo._base = baseunit[i];
dtinfo.den = 1;
dtinfo.num *= q;
return(0);
}
/* compare the metadata for two date-times
* return 1 if they are the same, or 0 if not
*/
static bool _equivalent_units(NpyArray_DateTimeInfo info1, NpyArray_DateTimeInfo info2)
{
/* Same meta object */
return((info1 == info2) ||
((info1._base == info2._base) &&
(info1.num == info2.num) &&
(info1.den == info2.den) &&
(info1.events == info2.events)));
}
private static NpyArray_DateTimeInfo NpyArray_DupDateTimeInfo(NpyArray_DateTimeInfo dtinfo)
{
NpyArray_DateTimeInfo newDateTimeInfo = new NpyArray_DateTimeInfo()
{
den = dtinfo.den,
events = dtinfo.events,
num = dtinfo.num,
_base = dtinfo._base,
};
return(newDateTimeInfo);
}
internal static int NpyArrayAccess_SetDateTimeInfo(NpyArray_Descr descr, string units, int num, int den, int events)
{
NpyArray_DateTimeInfo info = NpyArray_DateTimeInfoNew(units, num, den, events);
if (info == null)
{
return(-1);
}
if (descr.dtinfo != null)
{
NpyArray_free(descr.dtinfo);
}
descr.dtinfo = info;
return(0);
}
static void _init_datetime_descr(NpyArray_Descr descr)
{
NpyArray_DateTimeInfo dt_data;
dt_data = new NpyArray_DateTimeInfo();
dt_data._base = NPY_DATETIMEUNIT.NPY_FR_us;
dt_data.num = 1;
dt_data.den = 1;
dt_data.events = 1;
/* FIXME
* There is no error check here and no way to indicate an error
* until the metadata turns up NULL.
*/
descr.dtinfo = dt_data;
}
internal static NpyArray_DateTimeInfo NpyArray_DateTimeInfoNew(string units, int num, int den, int events)
{
NpyArray_DateTimeInfo dt_data;
dt_data = new NpyArray_DateTimeInfo();
dt_data._base = _unit_from_str(units);
/* Assumes other objects are Python integers */
dt_data.num = num;
dt_data.den = den;
dt_data.events = events;
if (dt_data.den > 1)
{
if (_convert_divisor_to_multiple(dt_data) < 0)
{
NpyArray_free(dt_data);
return(null);
}
}
return(dt_data);
}
private static void NpyArray_free(NpyArray_DateTimeInfo dtinfo)
{
return;
}
