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4854 lines
131 KiB
4854 lines
131 KiB
/* C implementation for the date/time type documented at |
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* http://www.zope.org/Members/fdrake/DateTimeWiki/FrontPage |
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*/ |
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|
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#include "Python.h" |
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#include "modsupport.h" |
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#include "structmember.h" |
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|
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#include <time.h> |
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|
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#include "datetime.h" |
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|
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/* We require that C int be at least 32 bits, and use int virtually |
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* everywhere. In just a few cases we use a temp long, where a Python |
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* API returns a C long. In such cases, we have to ensure that the |
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* final result fits in a C int (this can be an issue on 64-bit boxes). |
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*/ |
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#if SIZEOF_INT < 4 |
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# error "datetime.c requires that C int have at least 32 bits" |
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#endif |
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|
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#define MINYEAR 1 |
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#define MAXYEAR 9999 |
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|
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/* Nine decimal digits is easy to communicate, and leaves enough room |
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* so that two delta days can be added w/o fear of overflowing a signed |
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* 32-bit int, and with plenty of room left over to absorb any possible |
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* carries from adding seconds. |
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*/ |
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#define MAX_DELTA_DAYS 999999999 |
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|
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/* Rename the long macros in datetime.h to more reasonable short names. */ |
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#define GET_YEAR PyDateTime_GET_YEAR |
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#define GET_MONTH PyDateTime_GET_MONTH |
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#define GET_DAY PyDateTime_GET_DAY |
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#define DATE_GET_HOUR PyDateTime_DATE_GET_HOUR |
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#define DATE_GET_MINUTE PyDateTime_DATE_GET_MINUTE |
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#define DATE_GET_SECOND PyDateTime_DATE_GET_SECOND |
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#define DATE_GET_MICROSECOND PyDateTime_DATE_GET_MICROSECOND |
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|
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/* Date accessors for date and datetime. */ |
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#define SET_YEAR(o, v) (((o)->data[0] = ((v) & 0xff00) >> 8), \ |
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((o)->data[1] = ((v) & 0x00ff))) |
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#define SET_MONTH(o, v) (PyDateTime_GET_MONTH(o) = (v)) |
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#define SET_DAY(o, v) (PyDateTime_GET_DAY(o) = (v)) |
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|
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/* Date/Time accessors for datetime. */ |
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#define DATE_SET_HOUR(o, v) (PyDateTime_DATE_GET_HOUR(o) = (v)) |
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#define DATE_SET_MINUTE(o, v) (PyDateTime_DATE_GET_MINUTE(o) = (v)) |
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#define DATE_SET_SECOND(o, v) (PyDateTime_DATE_GET_SECOND(o) = (v)) |
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#define DATE_SET_MICROSECOND(o, v) \ |
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(((o)->data[7] = ((v) & 0xff0000) >> 16), \ |
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((o)->data[8] = ((v) & 0x00ff00) >> 8), \ |
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((o)->data[9] = ((v) & 0x0000ff))) |
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|
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/* Time accessors for time. */ |
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#define TIME_GET_HOUR PyDateTime_TIME_GET_HOUR |
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#define TIME_GET_MINUTE PyDateTime_TIME_GET_MINUTE |
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#define TIME_GET_SECOND PyDateTime_TIME_GET_SECOND |
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#define TIME_GET_MICROSECOND PyDateTime_TIME_GET_MICROSECOND |
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#define TIME_SET_HOUR(o, v) (PyDateTime_TIME_GET_HOUR(o) = (v)) |
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#define TIME_SET_MINUTE(o, v) (PyDateTime_TIME_GET_MINUTE(o) = (v)) |
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#define TIME_SET_SECOND(o, v) (PyDateTime_TIME_GET_SECOND(o) = (v)) |
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#define TIME_SET_MICROSECOND(o, v) \ |
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(((o)->data[3] = ((v) & 0xff0000) >> 16), \ |
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((o)->data[4] = ((v) & 0x00ff00) >> 8), \ |
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((o)->data[5] = ((v) & 0x0000ff))) |
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|
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/* Delta accessors for timedelta. */ |
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#define GET_TD_DAYS(o) (((PyDateTime_Delta *)(o))->days) |
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#define GET_TD_SECONDS(o) (((PyDateTime_Delta *)(o))->seconds) |
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#define GET_TD_MICROSECONDS(o) (((PyDateTime_Delta *)(o))->microseconds) |
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|
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#define SET_TD_DAYS(o, v) ((o)->days = (v)) |
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#define SET_TD_SECONDS(o, v) ((o)->seconds = (v)) |
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#define SET_TD_MICROSECONDS(o, v) ((o)->microseconds = (v)) |
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|
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/* p is a pointer to a time or a datetime object; HASTZINFO(p) returns |
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* p->hastzinfo. |
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*/ |
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#define HASTZINFO(p) (((_PyDateTime_BaseTZInfo *)(p))->hastzinfo) |
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|
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/* Forward declarations. */ |
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static PyTypeObject PyDateTime_DateType; |
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static PyTypeObject PyDateTime_DateTimeType; |
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static PyTypeObject PyDateTime_DeltaType; |
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static PyTypeObject PyDateTime_TimeType; |
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static PyTypeObject PyDateTime_TZInfoType; |
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|
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/* --------------------------------------------------------------------------- |
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* Math utilities. |
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*/ |
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|
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/* k = i+j overflows iff k differs in sign from both inputs, |
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* iff k^i has sign bit set and k^j has sign bit set, |
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* iff (k^i)&(k^j) has sign bit set. |
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*/ |
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#define SIGNED_ADD_OVERFLOWED(RESULT, I, J) \ |
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((((RESULT) ^ (I)) & ((RESULT) ^ (J))) < 0) |
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|
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/* Compute Python divmod(x, y), returning the quotient and storing the |
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* remainder into *r. The quotient is the floor of x/y, and that's |
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* the real point of this. C will probably truncate instead (C99 |
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* requires truncation; C89 left it implementation-defined). |
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* Simplification: we *require* that y > 0 here. That's appropriate |
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* for all the uses made of it. This simplifies the code and makes |
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* the overflow case impossible (divmod(LONG_MIN, -1) is the only |
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* overflow case). |
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*/ |
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static int |
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divmod(int x, int y, int *r) |
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{ |
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int quo; |
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|
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assert(y > 0); |
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quo = x / y; |
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*r = x - quo * y; |
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if (*r < 0) { |
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--quo; |
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*r += y; |
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} |
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assert(0 <= *r && *r < y); |
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return quo; |
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} |
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|
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/* Round a double to the nearest long. |x| must be small enough to fit |
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* in a C long; this is not checked. |
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*/ |
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static long |
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round_to_long(double x) |
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{ |
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if (x >= 0.0) |
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x = floor(x + 0.5); |
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else |
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x = ceil(x - 0.5); |
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return (long)x; |
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} |
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|
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/* --------------------------------------------------------------------------- |
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* General calendrical helper functions |
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*/ |
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|
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/* For each month ordinal in 1..12, the number of days in that month, |
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* and the number of days before that month in the same year. These |
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* are correct for non-leap years only. |
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*/ |
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static int _days_in_month[] = { |
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0, /* unused; this vector uses 1-based indexing */ |
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
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}; |
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|
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static int _days_before_month[] = { |
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0, /* unused; this vector uses 1-based indexing */ |
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 |
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}; |
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|
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/* year -> 1 if leap year, else 0. */ |
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static int |
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is_leap(int year) |
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{ |
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/* Cast year to unsigned. The result is the same either way, but |
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* C can generate faster code for unsigned mod than for signed |
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* mod (especially for % 4 -- a good compiler should just grab |
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* the last 2 bits when the LHS is unsigned). |
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*/ |
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const unsigned int ayear = (unsigned int)year; |
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return ayear % 4 == 0 && (ayear % 100 != 0 || ayear % 400 == 0); |
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} |
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|
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/* year, month -> number of days in that month in that year */ |
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static int |
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days_in_month(int year, int month) |
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{ |
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assert(month >= 1); |
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assert(month <= 12); |
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if (month == 2 && is_leap(year)) |
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return 29; |
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else |
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return _days_in_month[month]; |
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} |
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|
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/* year, month -> number of days in year preceeding first day of month */ |
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static int |
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days_before_month(int year, int month) |
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{ |
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int days; |
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|
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assert(month >= 1); |
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assert(month <= 12); |
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days = _days_before_month[month]; |
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if (month > 2 && is_leap(year)) |
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++days; |
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return days; |
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} |
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|
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/* year -> number of days before January 1st of year. Remember that we |
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* start with year 1, so days_before_year(1) == 0. |
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*/ |
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static int |
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days_before_year(int year) |
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{ |
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int y = year - 1; |
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/* This is incorrect if year <= 0; we really want the floor |
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* here. But so long as MINYEAR is 1, the smallest year this |
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* can see is 0 (this can happen in some normalization endcases), |
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* so we'll just special-case that. |
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*/ |
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assert (year >= 0); |
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if (y >= 0) |
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return y*365 + y/4 - y/100 + y/400; |
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else { |
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assert(y == -1); |
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return -366; |
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} |
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} |
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|
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/* Number of days in 4, 100, and 400 year cycles. That these have |
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* the correct values is asserted in the module init function. |
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*/ |
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#define DI4Y 1461 /* days_before_year(5); days in 4 years */ |
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#define DI100Y 36524 /* days_before_year(101); days in 100 years */ |
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#define DI400Y 146097 /* days_before_year(401); days in 400 years */ |
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|
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/* ordinal -> year, month, day, considering 01-Jan-0001 as day 1. */ |
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static void |
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ord_to_ymd(int ordinal, int *year, int *month, int *day) |
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{ |
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int n, n1, n4, n100, n400, leapyear, preceding; |
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|
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/* ordinal is a 1-based index, starting at 1-Jan-1. The pattern of |
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* leap years repeats exactly every 400 years. The basic strategy is |
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* to find the closest 400-year boundary at or before ordinal, then |
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* work with the offset from that boundary to ordinal. Life is much |
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* clearer if we subtract 1 from ordinal first -- then the values |
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* of ordinal at 400-year boundaries are exactly those divisible |
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* by DI400Y: |
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* |
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* D M Y n n-1 |
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* -- --- ---- ---------- ---------------- |
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* 31 Dec -400 -DI400Y -DI400Y -1 |
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* 1 Jan -399 -DI400Y +1 -DI400Y 400-year boundary |
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* ... |
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* 30 Dec 000 -1 -2 |
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* 31 Dec 000 0 -1 |
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* 1 Jan 001 1 0 400-year boundary |
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* 2 Jan 001 2 1 |
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* 3 Jan 001 3 2 |
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* ... |
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* 31 Dec 400 DI400Y DI400Y -1 |
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* 1 Jan 401 DI400Y +1 DI400Y 400-year boundary |
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*/ |
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assert(ordinal >= 1); |
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--ordinal; |
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n400 = ordinal / DI400Y; |
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n = ordinal % DI400Y; |
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*year = n400 * 400 + 1; |
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|
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/* Now n is the (non-negative) offset, in days, from January 1 of |
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* year, to the desired date. Now compute how many 100-year cycles |
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* precede n. |
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* Note that it's possible for n100 to equal 4! In that case 4 full |
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* 100-year cycles precede the desired day, which implies the |
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* desired day is December 31 at the end of a 400-year cycle. |
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*/ |
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n100 = n / DI100Y; |
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n = n % DI100Y; |
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|
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/* Now compute how many 4-year cycles precede it. */ |
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n4 = n / DI4Y; |
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n = n % DI4Y; |
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|
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/* And now how many single years. Again n1 can be 4, and again |
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* meaning that the desired day is December 31 at the end of the |
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* 4-year cycle. |
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*/ |
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n1 = n / 365; |
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n = n % 365; |
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|
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*year += n100 * 100 + n4 * 4 + n1; |
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if (n1 == 4 || n100 == 4) { |
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assert(n == 0); |
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*year -= 1; |
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*month = 12; |
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*day = 31; |
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return; |
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} |
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|
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/* Now the year is correct, and n is the offset from January 1. We |
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* find the month via an estimate that's either exact or one too |
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* large. |
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*/ |
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leapyear = n1 == 3 && (n4 != 24 || n100 == 3); |
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assert(leapyear == is_leap(*year)); |
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*month = (n + 50) >> 5; |
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preceding = (_days_before_month[*month] + (*month > 2 && leapyear)); |
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if (preceding > n) { |
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/* estimate is too large */ |
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*month -= 1; |
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preceding -= days_in_month(*year, *month); |
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} |
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n -= preceding; |
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assert(0 <= n); |
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assert(n < days_in_month(*year, *month)); |
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|
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*day = n + 1; |
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} |
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|
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/* year, month, day -> ordinal, considering 01-Jan-0001 as day 1. */ |
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static int |
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ymd_to_ord(int year, int month, int day) |
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{ |
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return days_before_year(year) + days_before_month(year, month) + day; |
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} |
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|
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/* Day of week, where Monday==0, ..., Sunday==6. 1/1/1 was a Monday. */ |
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static int |
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weekday(int year, int month, int day) |
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{ |
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return (ymd_to_ord(year, month, day) + 6) % 7; |
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} |
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|
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/* Ordinal of the Monday starting week 1 of the ISO year. Week 1 is the |
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* first calendar week containing a Thursday. |
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*/ |
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static int |
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iso_week1_monday(int year) |
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{ |
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int first_day = ymd_to_ord(year, 1, 1); /* ord of 1/1 */ |
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/* 0 if 1/1 is a Monday, 1 if a Tue, etc. */ |
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int first_weekday = (first_day + 6) % 7; |
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/* ordinal of closest Monday at or before 1/1 */ |
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int week1_monday = first_day - first_weekday; |
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|
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if (first_weekday > 3) /* if 1/1 was Fri, Sat, Sun */ |
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week1_monday += 7; |
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return week1_monday; |
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} |
|
|
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/* --------------------------------------------------------------------------- |
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* Range checkers. |
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*/ |
|
|
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/* Check that -MAX_DELTA_DAYS <= days <= MAX_DELTA_DAYS. If so, return 0. |
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* If not, raise OverflowError and return -1. |
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*/ |
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static int |
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check_delta_day_range(int days) |
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{ |
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if (-MAX_DELTA_DAYS <= days && days <= MAX_DELTA_DAYS) |
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return 0; |
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PyErr_Format(PyExc_OverflowError, |
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"days=%d; must have magnitude <= %d", |
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days, MAX_DELTA_DAYS); |
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return -1; |
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} |
|
|
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/* Check that date arguments are in range. Return 0 if they are. If they |
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* aren't, raise ValueError and return -1. |
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*/ |
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static int |
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check_date_args(int year, int month, int day) |
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{ |
|
|
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if (year < MINYEAR || year > MAXYEAR) { |
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PyErr_SetString(PyExc_ValueError, |
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"year is out of range"); |
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return -1; |
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} |
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if (month < 1 || month > 12) { |
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PyErr_SetString(PyExc_ValueError, |
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"month must be in 1..12"); |
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return -1; |
|
} |
|
if (day < 1 || day > days_in_month(year, month)) { |
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PyErr_SetString(PyExc_ValueError, |
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"day is out of range for month"); |
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return -1; |
|
} |
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return 0; |
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} |
|
|
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/* Check that time arguments are in range. Return 0 if they are. If they |
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* aren't, raise ValueError and return -1. |
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*/ |
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static int |
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check_time_args(int h, int m, int s, int us) |
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{ |
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if (h < 0 || h > 23) { |
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PyErr_SetString(PyExc_ValueError, |
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"hour must be in 0..23"); |
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return -1; |
|
} |
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if (m < 0 || m > 59) { |
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PyErr_SetString(PyExc_ValueError, |
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"minute must be in 0..59"); |
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return -1; |
|
} |
|
if (s < 0 || s > 59) { |
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PyErr_SetString(PyExc_ValueError, |
|
"second must be in 0..59"); |
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return -1; |
|
} |
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if (us < 0 || us > 999999) { |
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PyErr_SetString(PyExc_ValueError, |
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"microsecond must be in 0..999999"); |
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return -1; |
|
} |
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return 0; |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Normalization utilities. |
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*/ |
|
|
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/* One step of a mixed-radix conversion. A "hi" unit is equivalent to |
|
* factor "lo" units. factor must be > 0. If *lo is less than 0, or |
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* at least factor, enough of *lo is converted into "hi" units so that |
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* 0 <= *lo < factor. The input values must be such that int overflow |
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* is impossible. |
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*/ |
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static void |
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normalize_pair(int *hi, int *lo, int factor) |
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{ |
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assert(factor > 0); |
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assert(lo != hi); |
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if (*lo < 0 || *lo >= factor) { |
|
const int num_hi = divmod(*lo, factor, lo); |
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const int new_hi = *hi + num_hi; |
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assert(! SIGNED_ADD_OVERFLOWED(new_hi, *hi, num_hi)); |
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*hi = new_hi; |
|
} |
|
assert(0 <= *lo && *lo < factor); |
|
} |
|
|
|
/* Fiddle days (d), seconds (s), and microseconds (us) so that |
|
* 0 <= *s < 24*3600 |
|
* 0 <= *us < 1000000 |
|
* The input values must be such that the internals don't overflow. |
|
* The way this routine is used, we don't get close. |
|
*/ |
|
static void |
|
normalize_d_s_us(int *d, int *s, int *us) |
|
{ |
|
if (*us < 0 || *us >= 1000000) { |
|
normalize_pair(s, us, 1000000); |
|
/* |s| can't be bigger than about |
|
* |original s| + |original us|/1000000 now. |
|
*/ |
|
|
|
} |
|
if (*s < 0 || *s >= 24*3600) { |
|
normalize_pair(d, s, 24*3600); |
|
/* |d| can't be bigger than about |
|
* |original d| + |
|
* (|original s| + |original us|/1000000) / (24*3600) now. |
|
*/ |
|
} |
|
assert(0 <= *s && *s < 24*3600); |
|
assert(0 <= *us && *us < 1000000); |
|
} |
|
|
|
/* Fiddle years (y), months (m), and days (d) so that |
|
* 1 <= *m <= 12 |
|
* 1 <= *d <= days_in_month(*y, *m) |
|
* The input values must be such that the internals don't overflow. |
|
* The way this routine is used, we don't get close. |
|
*/ |
|
static void |
|
normalize_y_m_d(int *y, int *m, int *d) |
|
{ |
|
int dim; /* # of days in month */ |
|
|
|
/* This gets muddy: the proper range for day can't be determined |
|
* without knowing the correct month and year, but if day is, e.g., |
|
* plus or minus a million, the current month and year values make |
|
* no sense (and may also be out of bounds themselves). |
|
* Saying 12 months == 1 year should be non-controversial. |
|
*/ |
|
if (*m < 1 || *m > 12) { |
|
--*m; |
|
normalize_pair(y, m, 12); |
|
++*m; |
|
/* |y| can't be bigger than about |
|
* |original y| + |original m|/12 now. |
|
*/ |
|
} |
|
assert(1 <= *m && *m <= 12); |
|
|
|
/* Now only day can be out of bounds (year may also be out of bounds |
|
* for a datetime object, but we don't care about that here). |
|
* If day is out of bounds, what to do is arguable, but at least the |
|
* method here is principled and explainable. |
|
*/ |
|
dim = days_in_month(*y, *m); |
|
if (*d < 1 || *d > dim) { |
|
/* Move day-1 days from the first of the month. First try to |
|
* get off cheap if we're only one day out of range |
|
* (adjustments for timezone alone can't be worse than that). |
|
*/ |
|
if (*d == 0) { |
|
--*m; |
|
if (*m > 0) |
|
*d = days_in_month(*y, *m); |
|
else { |
|
--*y; |
|
*m = 12; |
|
*d = 31; |
|
} |
|
} |
|
else if (*d == dim + 1) { |
|
/* move forward a day */ |
|
++*m; |
|
*d = 1; |
|
if (*m > 12) { |
|
*m = 1; |
|
++*y; |
|
} |
|
} |
|
else { |
|
int ordinal = ymd_to_ord(*y, *m, 1) + |
|
*d - 1; |
|
ord_to_ymd(ordinal, y, m, d); |
|
} |
|
} |
|
assert(*m > 0); |
|
assert(*d > 0); |
|
} |
|
|
|
/* Fiddle out-of-bounds months and days so that the result makes some kind |
|
* of sense. The parameters are both inputs and outputs. Returns < 0 on |
|
* failure, where failure means the adjusted year is out of bounds. |
|
*/ |
|
static int |
|
normalize_date(int *year, int *month, int *day) |
|
{ |
|
int result; |
|
|
|
normalize_y_m_d(year, month, day); |
|
if (MINYEAR <= *year && *year <= MAXYEAR) |
|
result = 0; |
|
else { |
|
PyErr_SetString(PyExc_OverflowError, |
|
"date value out of range"); |
|
result = -1; |
|
} |
|
return result; |
|
} |
|
|
|
/* Force all the datetime fields into range. The parameters are both |
|
* inputs and outputs. Returns < 0 on error. |
|
*/ |
|
static int |
|
normalize_datetime(int *year, int *month, int *day, |
|
int *hour, int *minute, int *second, |
|
int *microsecond) |
|
{ |
|
normalize_pair(second, microsecond, 1000000); |
|
normalize_pair(minute, second, 60); |
|
normalize_pair(hour, minute, 60); |
|
normalize_pair(day, hour, 24); |
|
return normalize_date(year, month, day); |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Basic object allocation: tp_alloc implementations. These allocate |
|
* Python objects of the right size and type, and do the Python object- |
|
* initialization bit. If there's not enough memory, they return NULL after |
|
* setting MemoryError. All data members remain uninitialized trash. |
|
* |
|
* We abuse the tp_alloc "nitems" argument to communicate whether a tzinfo |
|
* member is needed. This is ugly, imprecise, and possibly insecure. |
|
* tp_basicsize for the time and datetime types is set to the size of the |
|
* struct that has room for the tzinfo member, so subclasses in Python will |
|
* allocate enough space for a tzinfo member whether or not one is actually |
|
* needed. That's the "ugly and imprecise" parts. The "possibly insecure" |
|
* part is that PyType_GenericAlloc() (which subclasses in Python end up |
|
* using) just happens today to effectively ignore the nitems argument |
|
* when tp_itemsize is 0, which it is for these type objects. If that |
|
* changes, perhaps the callers of tp_alloc slots in this file should |
|
* be changed to force a 0 nitems argument unless the type being allocated |
|
* is a base type implemented in this file (so that tp_alloc is time_alloc |
|
* or datetime_alloc below, which know about the nitems abuse). |
|
*/ |
|
|
|
static PyObject * |
|
time_alloc(PyTypeObject *type, int aware) |
|
{ |
|
PyObject *self; |
|
|
|
self = (PyObject *) |
|
PyObject_MALLOC(aware ? |
|
sizeof(PyDateTime_Time) : |
|
sizeof(_PyDateTime_BaseTime)); |
|
if (self == NULL) |
|
return (PyObject *)PyErr_NoMemory(); |
|
PyObject_INIT(self, type); |
|
return self; |
|
} |
|
|
|
static PyObject * |
|
datetime_alloc(PyTypeObject *type, int aware) |
|
{ |
|
PyObject *self; |
|
|
|
self = (PyObject *) |
|
PyObject_MALLOC(aware ? |
|
sizeof(PyDateTime_DateTime) : |
|
sizeof(_PyDateTime_BaseDateTime)); |
|
if (self == NULL) |
|
return (PyObject *)PyErr_NoMemory(); |
|
PyObject_INIT(self, type); |
|
return self; |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Helpers for setting object fields. These work on pointers to the |
|
* appropriate base class. |
|
*/ |
|
|
|
/* For date and datetime. */ |
|
static void |
|
set_date_fields(PyDateTime_Date *self, int y, int m, int d) |
|
{ |
|
self->hashcode = -1; |
|
SET_YEAR(self, y); |
|
SET_MONTH(self, m); |
|
SET_DAY(self, d); |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Create various objects, mostly without range checking. |
|
*/ |
|
|
|
/* Create a date instance with no range checking. */ |
|
static PyObject * |
|
new_date_ex(int year, int month, int day, PyTypeObject *type) |
|
{ |
|
PyDateTime_Date *self; |
|
|
|
self = (PyDateTime_Date *) (type->tp_alloc(type, 0)); |
|
if (self != NULL) |
|
set_date_fields(self, year, month, day); |
|
return (PyObject *) self; |
|
} |
|
|
|
#define new_date(year, month, day) \ |
|
new_date_ex(year, month, day, &PyDateTime_DateType) |
|
|
|
/* Create a datetime instance with no range checking. */ |
|
static PyObject * |
|
new_datetime_ex(int year, int month, int day, int hour, int minute, |
|
int second, int usecond, PyObject *tzinfo, PyTypeObject *type) |
|
{ |
|
PyDateTime_DateTime *self; |
|
char aware = tzinfo != Py_None; |
|
|
|
self = (PyDateTime_DateTime *) (type->tp_alloc(type, aware)); |
|
if (self != NULL) { |
|
self->hastzinfo = aware; |
|
set_date_fields((PyDateTime_Date *)self, year, month, day); |
|
DATE_SET_HOUR(self, hour); |
|
DATE_SET_MINUTE(self, minute); |
|
DATE_SET_SECOND(self, second); |
|
DATE_SET_MICROSECOND(self, usecond); |
|
if (aware) { |
|
Py_INCREF(tzinfo); |
|
self->tzinfo = tzinfo; |
|
} |
|
} |
|
return (PyObject *)self; |
|
} |
|
|
|
#define new_datetime(y, m, d, hh, mm, ss, us, tzinfo) \ |
|
new_datetime_ex(y, m, d, hh, mm, ss, us, tzinfo, \ |
|
&PyDateTime_DateTimeType) |
|
|
|
/* Create a time instance with no range checking. */ |
|
static PyObject * |
|
new_time_ex(int hour, int minute, int second, int usecond, |
|
PyObject *tzinfo, PyTypeObject *type) |
|
{ |
|
PyDateTime_Time *self; |
|
char aware = tzinfo != Py_None; |
|
|
|
self = (PyDateTime_Time *) (type->tp_alloc(type, aware)); |
|
if (self != NULL) { |
|
self->hastzinfo = aware; |
|
self->hashcode = -1; |
|
TIME_SET_HOUR(self, hour); |
|
TIME_SET_MINUTE(self, minute); |
|
TIME_SET_SECOND(self, second); |
|
TIME_SET_MICROSECOND(self, usecond); |
|
if (aware) { |
|
Py_INCREF(tzinfo); |
|
self->tzinfo = tzinfo; |
|
} |
|
} |
|
return (PyObject *)self; |
|
} |
|
|
|
#define new_time(hh, mm, ss, us, tzinfo) \ |
|
new_time_ex(hh, mm, ss, us, tzinfo, &PyDateTime_TimeType) |
|
|
|
/* Create a timedelta instance. Normalize the members iff normalize is |
|
* true. Passing false is a speed optimization, if you know for sure |
|
* that seconds and microseconds are already in their proper ranges. In any |
|
* case, raises OverflowError and returns NULL if the normalized days is out |
|
* of range). |
|
*/ |
|
static PyObject * |
|
new_delta_ex(int days, int seconds, int microseconds, int normalize, |
|
PyTypeObject *type) |
|
{ |
|
PyDateTime_Delta *self; |
|
|
|
if (normalize) |
|
normalize_d_s_us(&days, &seconds, µseconds); |
|
assert(0 <= seconds && seconds < 24*3600); |
|
assert(0 <= microseconds && microseconds < 1000000); |
|
|
|
if (check_delta_day_range(days) < 0) |
|
return NULL; |
|
|
|
self = (PyDateTime_Delta *) (type->tp_alloc(type, 0)); |
|
if (self != NULL) { |
|
self->hashcode = -1; |
|
SET_TD_DAYS(self, days); |
|
SET_TD_SECONDS(self, seconds); |
|
SET_TD_MICROSECONDS(self, microseconds); |
|
} |
|
return (PyObject *) self; |
|
} |
|
|
|
#define new_delta(d, s, us, normalize) \ |
|
new_delta_ex(d, s, us, normalize, &PyDateTime_DeltaType) |
|
|
|
/* --------------------------------------------------------------------------- |
|
* tzinfo helpers. |
|
*/ |
|
|
|
/* Ensure that p is None or of a tzinfo subclass. Return 0 if OK; if not |
|
* raise TypeError and return -1. |
|
*/ |
|
static int |
|
check_tzinfo_subclass(PyObject *p) |
|
{ |
|
if (p == Py_None || PyTZInfo_Check(p)) |
|
return 0; |
|
PyErr_Format(PyExc_TypeError, |
|
"tzinfo argument must be None or of a tzinfo subclass, " |
|
"not type '%s'", |
|
p->ob_type->tp_name); |
|
return -1; |
|
} |
|
|
|
/* Return tzinfo.methname(tzinfoarg), without any checking of results. |
|
* If tzinfo is None, returns None. |
|
*/ |
|
static PyObject * |
|
call_tzinfo_method(PyObject *tzinfo, char *methname, PyObject *tzinfoarg) |
|
{ |
|
PyObject *result; |
|
|
|
assert(tzinfo && methname && tzinfoarg); |
|
assert(check_tzinfo_subclass(tzinfo) >= 0); |
|
if (tzinfo == Py_None) { |
|
result = Py_None; |
|
Py_INCREF(result); |
|
} |
|
else |
|
result = PyObject_CallMethod(tzinfo, methname, "O", tzinfoarg); |
|
return result; |
|
} |
|
|
|
/* If self has a tzinfo member, return a BORROWED reference to it. Else |
|
* return NULL, which is NOT AN ERROR. There are no error returns here, |
|
* and the caller must not decref the result. |
|
*/ |
|
static PyObject * |
|
get_tzinfo_member(PyObject *self) |
|
{ |
|
PyObject *tzinfo = NULL; |
|
|
|
if (PyDateTime_Check(self) && HASTZINFO(self)) |
|
tzinfo = ((PyDateTime_DateTime *)self)->tzinfo; |
|
else if (PyTime_Check(self) && HASTZINFO(self)) |
|
tzinfo = ((PyDateTime_Time *)self)->tzinfo; |
|
|
|
return tzinfo; |
|
} |
|
|
|
/* Call getattr(tzinfo, name)(tzinfoarg), and extract an int from the |
|
* result. tzinfo must be an instance of the tzinfo class. If the method |
|
* returns None, this returns 0 and sets *none to 1. If the method doesn't |
|
* return None or timedelta, TypeError is raised and this returns -1. If it |
|
* returnsa timedelta and the value is out of range or isn't a whole number |
|
* of minutes, ValueError is raised and this returns -1. |
|
* Else *none is set to 0 and the integer method result is returned. |
|
*/ |
|
static int |
|
call_utc_tzinfo_method(PyObject *tzinfo, char *name, PyObject *tzinfoarg, |
|
int *none) |
|
{ |
|
PyObject *u; |
|
int result = -1; |
|
|
|
assert(tzinfo != NULL); |
|
assert(PyTZInfo_Check(tzinfo)); |
|
assert(tzinfoarg != NULL); |
|
|
|
*none = 0; |
|
u = call_tzinfo_method(tzinfo, name, tzinfoarg); |
|
if (u == NULL) |
|
return -1; |
|
|
|
else if (u == Py_None) { |
|
result = 0; |
|
*none = 1; |
|
} |
|
else if (PyDelta_Check(u)) { |
|
const int days = GET_TD_DAYS(u); |
|
if (days < -1 || days > 0) |
|
result = 24*60; /* trigger ValueError below */ |
|
else { |
|
/* next line can't overflow because we know days |
|
* is -1 or 0 now |
|
*/ |
|
int ss = days * 24 * 3600 + GET_TD_SECONDS(u); |
|
result = divmod(ss, 60, &ss); |
|
if (ss || GET_TD_MICROSECONDS(u)) { |
|
PyErr_Format(PyExc_ValueError, |
|
"tzinfo.%s() must return a " |
|
"whole number of minutes", |
|
name); |
|
result = -1; |
|
} |
|
} |
|
} |
|
else { |
|
PyErr_Format(PyExc_TypeError, |
|
"tzinfo.%s() must return None or " |
|
"timedelta, not '%s'", |
|
name, u->ob_type->tp_name); |
|
} |
|
|
|
Py_DECREF(u); |
|
if (result < -1439 || result > 1439) { |
|
PyErr_Format(PyExc_ValueError, |
|
"tzinfo.%s() returned %d; must be in " |
|
"-1439 .. 1439", |
|
name, result); |
|
result = -1; |
|
} |
|
return result; |
|
} |
|
|
|
/* Call tzinfo.utcoffset(tzinfoarg), and extract an integer from the |
|
* result. tzinfo must be an instance of the tzinfo class. If utcoffset() |
|
* returns None, call_utcoffset returns 0 and sets *none to 1. If uctoffset() |
|
* doesn't return None or timedelta, TypeError is raised and this returns -1. |
|
* If utcoffset() returns an invalid timedelta (out of range, or not a whole |
|
* # of minutes), ValueError is raised and this returns -1. Else *none is |
|
* set to 0 and the offset is returned (as int # of minutes east of UTC). |
|
*/ |
|
static int |
|
call_utcoffset(PyObject *tzinfo, PyObject *tzinfoarg, int *none) |
|
{ |
|
return call_utc_tzinfo_method(tzinfo, "utcoffset", tzinfoarg, none); |
|
} |
|
|
|
/* Call tzinfo.name(tzinfoarg), and return the offset as a timedelta or None. |
|
*/ |
|
static PyObject * |
|
offset_as_timedelta(PyObject *tzinfo, char *name, PyObject *tzinfoarg) { |
|
PyObject *result; |
|
|
|
assert(tzinfo && name && tzinfoarg); |
|
if (tzinfo == Py_None) { |
|
result = Py_None; |
|
Py_INCREF(result); |
|
} |
|
else { |
|
int none; |
|
int offset = call_utc_tzinfo_method(tzinfo, name, tzinfoarg, |
|
&none); |
|
if (offset < 0 && PyErr_Occurred()) |
|
return NULL; |
|
if (none) { |
|
result = Py_None; |
|
Py_INCREF(result); |
|
} |
|
else |
|
result = new_delta(0, offset * 60, 0, 1); |
|
} |
|
return result; |
|
} |
|
|
|
/* Call tzinfo.dst(tzinfoarg), and extract an integer from the |
|
* result. tzinfo must be an instance of the tzinfo class. If dst() |
|
* returns None, call_dst returns 0 and sets *none to 1. If dst() |
|
& doesn't return None or timedelta, TypeError is raised and this |
|
* returns -1. If dst() returns an invalid timedelta for a UTC offset, |
|
* ValueError is raised and this returns -1. Else *none is set to 0 and |
|
* the offset is returned (as an int # of minutes east of UTC). |
|
*/ |
|
static int |
|
call_dst(PyObject *tzinfo, PyObject *tzinfoarg, int *none) |
|
{ |
|
return call_utc_tzinfo_method(tzinfo, "dst", tzinfoarg, none); |
|
} |
|
|
|
/* Call tzinfo.tzname(tzinfoarg), and return the result. tzinfo must be |
|
* an instance of the tzinfo class or None. If tzinfo isn't None, and |
|
* tzname() doesn't return None or a string, TypeError is raised and this |
|
* returns NULL. |
|
*/ |
|
static PyObject * |
|
call_tzname(PyObject *tzinfo, PyObject *tzinfoarg) |
|
{ |
|
PyObject *result; |
|
|
|
assert(tzinfo != NULL); |
|
assert(check_tzinfo_subclass(tzinfo) >= 0); |
|
assert(tzinfoarg != NULL); |
|
|
|
if (tzinfo == Py_None) { |
|
result = Py_None; |
|
Py_INCREF(result); |
|
} |
|
else |
|
result = PyObject_CallMethod(tzinfo, "tzname", "O", tzinfoarg); |
|
|
|
if (result != NULL && result != Py_None && ! PyString_Check(result)) { |
|
PyErr_Format(PyExc_TypeError, "tzinfo.tzname() must " |
|
"return None or a string, not '%s'", |
|
result->ob_type->tp_name); |
|
Py_DECREF(result); |
|
result = NULL; |
|
} |
|
return result; |
|
} |
|
|
|
typedef enum { |
|
/* an exception has been set; the caller should pass it on */ |
|
OFFSET_ERROR, |
|
|
|
/* type isn't date, datetime, or time subclass */ |
|
OFFSET_UNKNOWN, |
|
|
|
/* date, |
|
* datetime with !hastzinfo |
|
* datetime with None tzinfo, |
|
* datetime where utcoffset() returns None |
|
* time with !hastzinfo |
|
* time with None tzinfo, |
|
* time where utcoffset() returns None |
|
*/ |
|
OFFSET_NAIVE, |
|
|
|
/* time or datetime where utcoffset() doesn't return None */ |
|
OFFSET_AWARE, |
|
} naivety; |
|
|
|
/* Classify an object as to whether it's naive or offset-aware. See |
|
* the "naivety" typedef for details. If the type is aware, *offset is set |
|
* to minutes east of UTC (as returned by the tzinfo.utcoffset() method). |
|
* If the type is offset-naive (or unknown, or error), *offset is set to 0. |
|
* tzinfoarg is the argument to pass to the tzinfo.utcoffset() method. |
|
*/ |
|
static naivety |
|
classify_utcoffset(PyObject *op, PyObject *tzinfoarg, int *offset) |
|
{ |
|
int none; |
|
PyObject *tzinfo; |
|
|
|
assert(tzinfoarg != NULL); |
|
*offset = 0; |
|
tzinfo = get_tzinfo_member(op); /* NULL means no tzinfo, not error */ |
|
if (tzinfo == Py_None) |
|
return OFFSET_NAIVE; |
|
if (tzinfo == NULL) { |
|
/* note that a datetime passes the PyDate_Check test */ |
|
return (PyTime_Check(op) || PyDate_Check(op)) ? |
|
OFFSET_NAIVE : OFFSET_UNKNOWN; |
|
} |
|
*offset = call_utcoffset(tzinfo, tzinfoarg, &none); |
|
if (*offset == -1 && PyErr_Occurred()) |
|
return OFFSET_ERROR; |
|
return none ? OFFSET_NAIVE : OFFSET_AWARE; |
|
} |
|
|
|
/* Classify two objects as to whether they're naive or offset-aware. |
|
* This isn't quite the same as calling classify_utcoffset() twice: for |
|
* binary operations (comparison and subtraction), we generally want to |
|
* ignore the tzinfo members if they're identical. This is by design, |
|
* so that results match "naive" expectations when mixing objects from a |
|
* single timezone. So in that case, this sets both offsets to 0 and |
|
* both naiveties to OFFSET_NAIVE. |
|
* The function returns 0 if everything's OK, and -1 on error. |
|
*/ |
|
static int |
|
classify_two_utcoffsets(PyObject *o1, int *offset1, naivety *n1, |
|
PyObject *tzinfoarg1, |
|
PyObject *o2, int *offset2, naivety *n2, |
|
PyObject *tzinfoarg2) |
|
{ |
|
if (get_tzinfo_member(o1) == get_tzinfo_member(o2)) { |
|
*offset1 = *offset2 = 0; |
|
*n1 = *n2 = OFFSET_NAIVE; |
|
} |
|
else { |
|
*n1 = classify_utcoffset(o1, tzinfoarg1, offset1); |
|
if (*n1 == OFFSET_ERROR) |
|
return -1; |
|
*n2 = classify_utcoffset(o2, tzinfoarg2, offset2); |
|
if (*n2 == OFFSET_ERROR) |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
|
|
/* repr is like "someclass(arg1, arg2)". If tzinfo isn't None, |
|
* stuff |
|
* ", tzinfo=" + repr(tzinfo) |
|
* before the closing ")". |
|
*/ |
|
static PyObject * |
|
append_keyword_tzinfo(PyObject *repr, PyObject *tzinfo) |
|
{ |
|
PyObject *temp; |
|
|
|
assert(PyString_Check(repr)); |
|
assert(tzinfo); |
|
if (tzinfo == Py_None) |
|
return repr; |
|
/* Get rid of the trailing ')'. */ |
|
assert(PyString_AsString(repr)[PyString_Size(repr)-1] == ')'); |
|
temp = PyString_FromStringAndSize(PyString_AsString(repr), |
|
PyString_Size(repr) - 1); |
|
Py_DECREF(repr); |
|
if (temp == NULL) |
|
return NULL; |
|
repr = temp; |
|
|
|
/* Append ", tzinfo=". */ |
|
PyString_ConcatAndDel(&repr, PyString_FromString(", tzinfo=")); |
|
|
|
/* Append repr(tzinfo). */ |
|
PyString_ConcatAndDel(&repr, PyObject_Repr(tzinfo)); |
|
|
|
/* Add a closing paren. */ |
|
PyString_ConcatAndDel(&repr, PyString_FromString(")")); |
|
return repr; |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* String format helpers. |
|
*/ |
|
|
|
static PyObject * |
|
format_ctime(PyDateTime_Date *date, int hours, int minutes, int seconds) |
|
{ |
|
static char *DayNames[] = { |
|
"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" |
|
}; |
|
static char *MonthNames[] = { |
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun", |
|
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
|
}; |
|
|
|
char buffer[128]; |
|
int wday = weekday(GET_YEAR(date), GET_MONTH(date), GET_DAY(date)); |
|
|
|
PyOS_snprintf(buffer, sizeof(buffer), "%s %s %2d %02d:%02d:%02d %04d", |
|
DayNames[wday], MonthNames[GET_MONTH(date) - 1], |
|
GET_DAY(date), hours, minutes, seconds, |
|
GET_YEAR(date)); |
|
return PyString_FromString(buffer); |
|
} |
|
|
|
/* Add an hours & minutes UTC offset string to buf. buf has no more than |
|
* buflen bytes remaining. The UTC offset is gotten by calling |
|
* tzinfo.uctoffset(tzinfoarg). If that returns None, \0 is stored into |
|
* *buf, and that's all. Else the returned value is checked for sanity (an |
|
* integer in range), and if that's OK it's converted to an hours & minutes |
|
* string of the form |
|
* sign HH sep MM |
|
* Returns 0 if everything is OK. If the return value from utcoffset() is |
|
* bogus, an appropriate exception is set and -1 is returned. |
|
*/ |
|
static int |
|
format_utcoffset(char *buf, size_t buflen, const char *sep, |
|
PyObject *tzinfo, PyObject *tzinfoarg) |
|
{ |
|
int offset; |
|
int hours; |
|
int minutes; |
|
char sign; |
|
int none; |
|
|
|
offset = call_utcoffset(tzinfo, tzinfoarg, &none); |
|
if (offset == -1 && PyErr_Occurred()) |
|
return -1; |
|
if (none) { |
|
*buf = '\0'; |
|
return 0; |
|
} |
|
sign = '+'; |
|
if (offset < 0) { |
|
sign = '-'; |
|
offset = - offset; |
|
} |
|
hours = divmod(offset, 60, &minutes); |
|
PyOS_snprintf(buf, buflen, "%c%02d%s%02d", sign, hours, sep, minutes); |
|
return 0; |
|
} |
|
|
|
/* I sure don't want to reproduce the strftime code from the time module, |
|
* so this imports the module and calls it. All the hair is due to |
|
* giving special meanings to the %z and %Z format codes via a preprocessing |
|
* step on the format string. |
|
* tzinfoarg is the argument to pass to the object's tzinfo method, if |
|
* needed. |
|
*/ |
|
static PyObject * |
|
wrap_strftime(PyObject *object, PyObject *format, PyObject *timetuple, |
|
PyObject *tzinfoarg) |
|
{ |
|
PyObject *result = NULL; /* guilty until proved innocent */ |
|
|
|
PyObject *zreplacement = NULL; /* py string, replacement for %z */ |
|
PyObject *Zreplacement = NULL; /* py string, replacement for %Z */ |
|
|
|
char *pin; /* pointer to next char in input format */ |
|
char ch; /* next char in input format */ |
|
|
|
PyObject *newfmt = NULL; /* py string, the output format */ |
|
char *pnew; /* pointer to available byte in output format */ |
|
char totalnew; /* number bytes total in output format buffer, |
|
exclusive of trailing \0 */ |
|
char usednew; /* number bytes used so far in output format buffer */ |
|
|
|
char *ptoappend; /* pointer to string to append to output buffer */ |
|
int ntoappend; /* # of bytes to append to output buffer */ |
|
|
|
assert(object && format && timetuple); |
|
assert(PyString_Check(format)); |
|
|
|
/* Give up if the year is before 1900. |
|
* Python strftime() plays games with the year, and different |
|
* games depending on whether envar PYTHON2K is set. This makes |
|
* years before 1900 a nightmare, even if the platform strftime |
|
* supports them (and not all do). |
|
* We could get a lot farther here by avoiding Python's strftime |
|
* wrapper and calling the C strftime() directly, but that isn't |
|
* an option in the Python implementation of this module. |
|
*/ |
|
{ |
|
long year; |
|
PyObject *pyyear = PySequence_GetItem(timetuple, 0); |
|
if (pyyear == NULL) return NULL; |
|
assert(PyInt_Check(pyyear)); |
|
year = PyInt_AsLong(pyyear); |
|
Py_DECREF(pyyear); |
|
if (year < 1900) { |
|
PyErr_Format(PyExc_ValueError, "year=%ld is before " |
|
"1900; the datetime strftime() " |
|
"methods require year >= 1900", |
|
year); |
|
return NULL; |
|
} |
|
} |
|
|
|
/* Scan the input format, looking for %z and %Z escapes, building |
|
* a new format. Since computing the replacements for those codes |
|
* is expensive, don't unless they're actually used. |
|
*/ |
|
totalnew = PyString_Size(format) + 1; /* realistic if no %z/%Z */ |
|
newfmt = PyString_FromStringAndSize(NULL, totalnew); |
|
if (newfmt == NULL) goto Done; |
|
pnew = PyString_AsString(newfmt); |
|
usednew = 0; |
|
|
|
pin = PyString_AsString(format); |
|
while ((ch = *pin++) != '\0') { |
|
if (ch != '%') { |
|
ptoappend = pin - 1; |
|
ntoappend = 1; |
|
} |
|
else if ((ch = *pin++) == '\0') { |
|
/* There's a lone trailing %; doesn't make sense. */ |
|
PyErr_SetString(PyExc_ValueError, "strftime format " |
|
"ends with raw %"); |
|
goto Done; |
|
} |
|
/* A % has been seen and ch is the character after it. */ |
|
else if (ch == 'z') { |
|
if (zreplacement == NULL) { |
|
/* format utcoffset */ |
|
char buf[100]; |
|
PyObject *tzinfo = get_tzinfo_member(object); |
|
zreplacement = PyString_FromString(""); |
|
if (zreplacement == NULL) goto Done; |
|
if (tzinfo != Py_None && tzinfo != NULL) { |
|
assert(tzinfoarg != NULL); |
|
if (format_utcoffset(buf, |
|
sizeof(buf), |
|
"", |
|
tzinfo, |
|
tzinfoarg) < 0) |
|
goto Done; |
|
Py_DECREF(zreplacement); |
|
zreplacement = PyString_FromString(buf); |
|
if (zreplacement == NULL) goto Done; |
|
} |
|
} |
|
assert(zreplacement != NULL); |
|
ptoappend = PyString_AsString(zreplacement); |
|
ntoappend = PyString_Size(zreplacement); |
|
} |
|
else if (ch == 'Z') { |
|
/* format tzname */ |
|
if (Zreplacement == NULL) { |
|
PyObject *tzinfo = get_tzinfo_member(object); |
|
Zreplacement = PyString_FromString(""); |
|
if (Zreplacement == NULL) goto Done; |
|
if (tzinfo != Py_None && tzinfo != NULL) { |
|
PyObject *temp; |
|
assert(tzinfoarg != NULL); |
|
temp = call_tzname(tzinfo, tzinfoarg); |
|
if (temp == NULL) goto Done; |
|
if (temp != Py_None) { |
|
assert(PyString_Check(temp)); |
|
/* Since the tzname is getting |
|
* stuffed into the format, we |
|
* have to double any % signs |
|
* so that strftime doesn't |
|
* treat them as format codes. |
|
*/ |
|
Py_DECREF(Zreplacement); |
|
Zreplacement = PyObject_CallMethod( |
|
temp, "replace", |
|
"ss", "%", "%%"); |
|
Py_DECREF(temp); |
|
if (Zreplacement == NULL) |
|
goto Done; |
|
} |
|
else |
|
Py_DECREF(temp); |
|
} |
|
} |
|
assert(Zreplacement != NULL); |
|
ptoappend = PyString_AsString(Zreplacement); |
|
ntoappend = PyString_Size(Zreplacement); |
|
} |
|
else { |
|
/* percent followed by neither z nor Z */ |
|
ptoappend = pin - 2; |
|
ntoappend = 2; |
|
} |
|
|
|
/* Append the ntoappend chars starting at ptoappend to |
|
* the new format. |
|
*/ |
|
assert(ntoappend >= 0); |
|
if (ntoappend == 0) |
|
continue; |
|
while (usednew + ntoappend > totalnew) { |
|
int bigger = totalnew << 1; |
|
if ((bigger >> 1) != totalnew) { /* overflow */ |
|
PyErr_NoMemory(); |
|
goto Done; |
|
} |
|
if (_PyString_Resize(&newfmt, bigger) < 0) |
|
goto Done; |
|
totalnew = bigger; |
|
pnew = PyString_AsString(newfmt) + usednew; |
|
} |
|
memcpy(pnew, ptoappend, ntoappend); |
|
pnew += ntoappend; |
|
usednew += ntoappend; |
|
assert(usednew <= totalnew); |
|
} /* end while() */ |
|
|
|
if (_PyString_Resize(&newfmt, usednew) < 0) |
|
goto Done; |
|
{ |
|
PyObject *time = PyImport_ImportModule("time"); |
|
if (time == NULL) |
|
goto Done; |
|
result = PyObject_CallMethod(time, "strftime", "OO", |
|
newfmt, timetuple); |
|
Py_DECREF(time); |
|
} |
|
Done: |
|
Py_XDECREF(zreplacement); |
|
Py_XDECREF(Zreplacement); |
|
Py_XDECREF(newfmt); |
|
return result; |
|
} |
|
|
|
static char * |
|
isoformat_date(PyDateTime_Date *dt, char buffer[], int bufflen) |
|
{ |
|
int x; |
|
x = PyOS_snprintf(buffer, bufflen, |
|
"%04d-%02d-%02d", |
|
GET_YEAR(dt), GET_MONTH(dt), GET_DAY(dt)); |
|
return buffer + x; |
|
} |
|
|
|
static void |
|
isoformat_time(PyDateTime_DateTime *dt, char buffer[], int bufflen) |
|
{ |
|
int us = DATE_GET_MICROSECOND(dt); |
|
|
|
PyOS_snprintf(buffer, bufflen, |
|
"%02d:%02d:%02d", /* 8 characters */ |
|
DATE_GET_HOUR(dt), |
|
DATE_GET_MINUTE(dt), |
|
DATE_GET_SECOND(dt)); |
|
if (us) |
|
PyOS_snprintf(buffer + 8, bufflen - 8, ".%06d", us); |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Wrap functions from the time module. These aren't directly available |
|
* from C. Perhaps they should be. |
|
*/ |
|
|
|
/* Call time.time() and return its result (a Python float). */ |
|
static PyObject * |
|
time_time(void) |
|
{ |
|
PyObject *result = NULL; |
|
PyObject *time = PyImport_ImportModule("time"); |
|
|
|
if (time != NULL) { |
|
result = PyObject_CallMethod(time, "time", "()"); |
|
Py_DECREF(time); |
|
} |
|
return result; |
|
} |
|
|
|
/* Build a time.struct_time. The weekday and day number are automatically |
|
* computed from the y,m,d args. |
|
*/ |
|
static PyObject * |
|
build_struct_time(int y, int m, int d, int hh, int mm, int ss, int dstflag) |
|
{ |
|
PyObject *time; |
|
PyObject *result = NULL; |
|
|
|
time = PyImport_ImportModule("time"); |
|
if (time != NULL) { |
|
result = PyObject_CallMethod(time, "struct_time", |
|
"((iiiiiiiii))", |
|
y, m, d, |
|
hh, mm, ss, |
|
weekday(y, m, d), |
|
days_before_month(y, m) + d, |
|
dstflag); |
|
Py_DECREF(time); |
|
} |
|
return result; |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Miscellaneous helpers. |
|
*/ |
|
|
|
/* For obscure reasons, we need to use tp_richcompare instead of tp_compare. |
|
* The comparisons here all most naturally compute a cmp()-like result. |
|
* This little helper turns that into a bool result for rich comparisons. |
|
*/ |
|
static PyObject * |
|
diff_to_bool(int diff, int op) |
|
{ |
|
PyObject *result; |
|
int istrue; |
|
|
|
switch (op) { |
|
case Py_EQ: istrue = diff == 0; break; |
|
case Py_NE: istrue = diff != 0; break; |
|
case Py_LE: istrue = diff <= 0; break; |
|
case Py_GE: istrue = diff >= 0; break; |
|
case Py_LT: istrue = diff < 0; break; |
|
case Py_GT: istrue = diff > 0; break; |
|
default: |
|
assert(! "op unknown"); |
|
istrue = 0; /* To shut up compiler */ |
|
} |
|
result = istrue ? Py_True : Py_False; |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
/* Raises a "can't compare" TypeError and returns NULL. */ |
|
static PyObject * |
|
cmperror(PyObject *a, PyObject *b) |
|
{ |
|
PyErr_Format(PyExc_TypeError, |
|
"can't compare %s to %s", |
|
a->ob_type->tp_name, b->ob_type->tp_name); |
|
return NULL; |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Cached Python objects; these are set by the module init function. |
|
*/ |
|
|
|
/* Conversion factors. */ |
|
static PyObject *us_per_us = NULL; /* 1 */ |
|
static PyObject *us_per_ms = NULL; /* 1000 */ |
|
static PyObject *us_per_second = NULL; /* 1000000 */ |
|
static PyObject *us_per_minute = NULL; /* 1e6 * 60 as Python int */ |
|
static PyObject *us_per_hour = NULL; /* 1e6 * 3600 as Python long */ |
|
static PyObject *us_per_day = NULL; /* 1e6 * 3600 * 24 as Python long */ |
|
static PyObject *us_per_week = NULL; /* 1e6*3600*24*7 as Python long */ |
|
static PyObject *seconds_per_day = NULL; /* 3600*24 as Python int */ |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Class implementations. |
|
*/ |
|
|
|
/* |
|
* PyDateTime_Delta implementation. |
|
*/ |
|
|
|
/* Convert a timedelta to a number of us, |
|
* (24*3600*self.days + self.seconds)*1000000 + self.microseconds |
|
* as a Python int or long. |
|
* Doing mixed-radix arithmetic by hand instead is excruciating in C, |
|
* due to ubiquitous overflow possibilities. |
|
*/ |
|
static PyObject * |
|
delta_to_microseconds(PyDateTime_Delta *self) |
|
{ |
|
PyObject *x1 = NULL; |
|
PyObject *x2 = NULL; |
|
PyObject *x3 = NULL; |
|
PyObject *result = NULL; |
|
|
|
x1 = PyInt_FromLong(GET_TD_DAYS(self)); |
|
if (x1 == NULL) |
|
goto Done; |
|
x2 = PyNumber_Multiply(x1, seconds_per_day); /* days in seconds */ |
|
if (x2 == NULL) |
|
goto Done; |
|
Py_DECREF(x1); |
|
x1 = NULL; |
|
|
|
/* x2 has days in seconds */ |
|
x1 = PyInt_FromLong(GET_TD_SECONDS(self)); /* seconds */ |
|
if (x1 == NULL) |
|
goto Done; |
|
x3 = PyNumber_Add(x1, x2); /* days and seconds in seconds */ |
|
if (x3 == NULL) |
|
goto Done; |
|
Py_DECREF(x1); |
|
Py_DECREF(x2); |
|
x1 = x2 = NULL; |
|
|
|
/* x3 has days+seconds in seconds */ |
|
x1 = PyNumber_Multiply(x3, us_per_second); /* us */ |
|
if (x1 == NULL) |
|
goto Done; |
|
Py_DECREF(x3); |
|
x3 = NULL; |
|
|
|
/* x1 has days+seconds in us */ |
|
x2 = PyInt_FromLong(GET_TD_MICROSECONDS(self)); |
|
if (x2 == NULL) |
|
goto Done; |
|
result = PyNumber_Add(x1, x2); |
|
|
|
Done: |
|
Py_XDECREF(x1); |
|
Py_XDECREF(x2); |
|
Py_XDECREF(x3); |
|
return result; |
|
} |
|
|
|
/* Convert a number of us (as a Python int or long) to a timedelta. |
|
*/ |
|
static PyObject * |
|
microseconds_to_delta_ex(PyObject *pyus, PyTypeObject *type) |
|
{ |
|
int us; |
|
int s; |
|
int d; |
|
long temp; |
|
|
|
PyObject *tuple = NULL; |
|
PyObject *num = NULL; |
|
PyObject *result = NULL; |
|
|
|
tuple = PyNumber_Divmod(pyus, us_per_second); |
|
if (tuple == NULL) |
|
goto Done; |
|
|
|
num = PyTuple_GetItem(tuple, 1); /* us */ |
|
if (num == NULL) |
|
goto Done; |
|
temp = PyLong_AsLong(num); |
|
num = NULL; |
|
if (temp == -1 && PyErr_Occurred()) |
|
goto Done; |
|
assert(0 <= temp && temp < 1000000); |
|
us = (int)temp; |
|
if (us < 0) { |
|
/* The divisor was positive, so this must be an error. */ |
|
assert(PyErr_Occurred()); |
|
goto Done; |
|
} |
|
|
|
num = PyTuple_GetItem(tuple, 0); /* leftover seconds */ |
|
if (num == NULL) |
|
goto Done; |
|
Py_INCREF(num); |
|
Py_DECREF(tuple); |
|
|
|
tuple = PyNumber_Divmod(num, seconds_per_day); |
|
if (tuple == NULL) |
|
goto Done; |
|
Py_DECREF(num); |
|
|
|
num = PyTuple_GetItem(tuple, 1); /* seconds */ |
|
if (num == NULL) |
|
goto Done; |
|
temp = PyLong_AsLong(num); |
|
num = NULL; |
|
if (temp == -1 && PyErr_Occurred()) |
|
goto Done; |
|
assert(0 <= temp && temp < 24*3600); |
|
s = (int)temp; |
|
|
|
if (s < 0) { |
|
/* The divisor was positive, so this must be an error. */ |
|
assert(PyErr_Occurred()); |
|
goto Done; |
|
} |
|
|
|
num = PyTuple_GetItem(tuple, 0); /* leftover days */ |
|
if (num == NULL) |
|
goto Done; |
|
Py_INCREF(num); |
|
temp = PyLong_AsLong(num); |
|
if (temp == -1 && PyErr_Occurred()) |
|
goto Done; |
|
d = (int)temp; |
|
if ((long)d != temp) { |
|
PyErr_SetString(PyExc_OverflowError, "normalized days too " |
|
"large to fit in a C int"); |
|
goto Done; |
|
} |
|
result = new_delta_ex(d, s, us, 0, type); |
|
|
|
Done: |
|
Py_XDECREF(tuple); |
|
Py_XDECREF(num); |
|
return result; |
|
} |
|
|
|
#define microseconds_to_delta(pymicros) \ |
|
microseconds_to_delta_ex(pymicros, &PyDateTime_DeltaType) |
|
|
|
static PyObject * |
|
multiply_int_timedelta(PyObject *intobj, PyDateTime_Delta *delta) |
|
{ |
|
PyObject *pyus_in; |
|
PyObject *pyus_out; |
|
PyObject *result; |
|
|
|
pyus_in = delta_to_microseconds(delta); |
|
if (pyus_in == NULL) |
|
return NULL; |
|
|
|
pyus_out = PyNumber_Multiply(pyus_in, intobj); |
|
Py_DECREF(pyus_in); |
|
if (pyus_out == NULL) |
|
return NULL; |
|
|
|
result = microseconds_to_delta(pyus_out); |
|
Py_DECREF(pyus_out); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
divide_timedelta_int(PyDateTime_Delta *delta, PyObject *intobj) |
|
{ |
|
PyObject *pyus_in; |
|
PyObject *pyus_out; |
|
PyObject *result; |
|
|
|
pyus_in = delta_to_microseconds(delta); |
|
if (pyus_in == NULL) |
|
return NULL; |
|
|
|
pyus_out = PyNumber_FloorDivide(pyus_in, intobj); |
|
Py_DECREF(pyus_in); |
|
if (pyus_out == NULL) |
|
return NULL; |
|
|
|
result = microseconds_to_delta(pyus_out); |
|
Py_DECREF(pyus_out); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
delta_add(PyObject *left, PyObject *right) |
|
{ |
|
PyObject *result = Py_NotImplemented; |
|
|
|
if (PyDelta_Check(left) && PyDelta_Check(right)) { |
|
/* delta + delta */ |
|
/* The C-level additions can't overflow because of the |
|
* invariant bounds. |
|
*/ |
|
int days = GET_TD_DAYS(left) + GET_TD_DAYS(right); |
|
int seconds = GET_TD_SECONDS(left) + GET_TD_SECONDS(right); |
|
int microseconds = GET_TD_MICROSECONDS(left) + |
|
GET_TD_MICROSECONDS(right); |
|
result = new_delta(days, seconds, microseconds, 1); |
|
} |
|
|
|
if (result == Py_NotImplemented) |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
delta_negative(PyDateTime_Delta *self) |
|
{ |
|
return new_delta(-GET_TD_DAYS(self), |
|
-GET_TD_SECONDS(self), |
|
-GET_TD_MICROSECONDS(self), |
|
1); |
|
} |
|
|
|
static PyObject * |
|
delta_positive(PyDateTime_Delta *self) |
|
{ |
|
/* Could optimize this (by returning self) if this isn't a |
|
* subclass -- but who uses unary + ? Approximately nobody. |
|
*/ |
|
return new_delta(GET_TD_DAYS(self), |
|
GET_TD_SECONDS(self), |
|
GET_TD_MICROSECONDS(self), |
|
0); |
|
} |
|
|
|
static PyObject * |
|
delta_abs(PyDateTime_Delta *self) |
|
{ |
|
PyObject *result; |
|
|
|
assert(GET_TD_MICROSECONDS(self) >= 0); |
|
assert(GET_TD_SECONDS(self) >= 0); |
|
|
|
if (GET_TD_DAYS(self) < 0) |
|
result = delta_negative(self); |
|
else |
|
result = delta_positive(self); |
|
|
|
return result; |
|
} |
|
|
|
static PyObject * |
|
delta_subtract(PyObject *left, PyObject *right) |
|
{ |
|
PyObject *result = Py_NotImplemented; |
|
|
|
if (PyDelta_Check(left) && PyDelta_Check(right)) { |
|
/* delta - delta */ |
|
PyObject *minus_right = PyNumber_Negative(right); |
|
if (minus_right) { |
|
result = delta_add(left, minus_right); |
|
Py_DECREF(minus_right); |
|
} |
|
else |
|
result = NULL; |
|
} |
|
|
|
if (result == Py_NotImplemented) |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
/* This is more natural as a tp_compare, but doesn't work then: for whatever |
|
* reason, Python's try_3way_compare ignores tp_compare unless |
|
* PyInstance_Check returns true, but these aren't old-style classes. |
|
*/ |
|
static PyObject * |
|
delta_richcompare(PyDateTime_Delta *self, PyObject *other, int op) |
|
{ |
|
int diff = 42; /* nonsense */ |
|
|
|
if (PyDelta_Check(other)) { |
|
diff = GET_TD_DAYS(self) - GET_TD_DAYS(other); |
|
if (diff == 0) { |
|
diff = GET_TD_SECONDS(self) - GET_TD_SECONDS(other); |
|
if (diff == 0) |
|
diff = GET_TD_MICROSECONDS(self) - |
|
GET_TD_MICROSECONDS(other); |
|
} |
|
} |
|
else if (op == Py_EQ || op == Py_NE) |
|
diff = 1; /* any non-zero value will do */ |
|
|
|
else /* stop this from falling back to address comparison */ |
|
return cmperror((PyObject *)self, other); |
|
|
|
return diff_to_bool(diff, op); |
|
} |
|
|
|
static PyObject *delta_getstate(PyDateTime_Delta *self); |
|
|
|
static long |
|
delta_hash(PyDateTime_Delta *self) |
|
{ |
|
if (self->hashcode == -1) { |
|
PyObject *temp = delta_getstate(self); |
|
if (temp != NULL) { |
|
self->hashcode = PyObject_Hash(temp); |
|
Py_DECREF(temp); |
|
} |
|
} |
|
return self->hashcode; |
|
} |
|
|
|
static PyObject * |
|
delta_multiply(PyObject *left, PyObject *right) |
|
{ |
|
PyObject *result = Py_NotImplemented; |
|
|
|
if (PyDelta_Check(left)) { |
|
/* delta * ??? */ |
|
if (PyInt_Check(right) || PyLong_Check(right)) |
|
result = multiply_int_timedelta(right, |
|
(PyDateTime_Delta *) left); |
|
} |
|
else if (PyInt_Check(left) || PyLong_Check(left)) |
|
result = multiply_int_timedelta(left, |
|
(PyDateTime_Delta *) right); |
|
|
|
if (result == Py_NotImplemented) |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
delta_divide(PyObject *left, PyObject *right) |
|
{ |
|
PyObject *result = Py_NotImplemented; |
|
|
|
if (PyDelta_Check(left)) { |
|
/* delta * ??? */ |
|
if (PyInt_Check(right) || PyLong_Check(right)) |
|
result = divide_timedelta_int( |
|
(PyDateTime_Delta *)left, |
|
right); |
|
} |
|
|
|
if (result == Py_NotImplemented) |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
/* Fold in the value of the tag ("seconds", "weeks", etc) component of a |
|
* timedelta constructor. sofar is the # of microseconds accounted for |
|
* so far, and there are factor microseconds per current unit, the number |
|
* of which is given by num. num * factor is added to sofar in a |
|
* numerically careful way, and that's the result. Any fractional |
|
* microseconds left over (this can happen if num is a float type) are |
|
* added into *leftover. |
|
* Note that there are many ways this can give an error (NULL) return. |
|
*/ |
|
static PyObject * |
|
accum(const char* tag, PyObject *sofar, PyObject *num, PyObject *factor, |
|
double *leftover) |
|
{ |
|
PyObject *prod; |
|
PyObject *sum; |
|
|
|
assert(num != NULL); |
|
|
|
if (PyInt_Check(num) || PyLong_Check(num)) { |
|
prod = PyNumber_Multiply(num, factor); |
|
if (prod == NULL) |
|
return NULL; |
|
sum = PyNumber_Add(sofar, prod); |
|
Py_DECREF(prod); |
|
return sum; |
|
} |
|
|
|
if (PyFloat_Check(num)) { |
|
double dnum; |
|
double fracpart; |
|
double intpart; |
|
PyObject *x; |
|
PyObject *y; |
|
|
|
/* The Plan: decompose num into an integer part and a |
|
* fractional part, num = intpart + fracpart. |
|
* Then num * factor == |
|
* intpart * factor + fracpart * factor |
|
* and the LHS can be computed exactly in long arithmetic. |
|
* The RHS is again broken into an int part and frac part. |
|
* and the frac part is added into *leftover. |
|
*/ |
|
dnum = PyFloat_AsDouble(num); |
|
if (dnum == -1.0 && PyErr_Occurred()) |
|
return NULL; |
|
fracpart = modf(dnum, &intpart); |
|
x = PyLong_FromDouble(intpart); |
|
if (x == NULL) |
|
return NULL; |
|
|
|
prod = PyNumber_Multiply(x, factor); |
|
Py_DECREF(x); |
|
if (prod == NULL) |
|
return NULL; |
|
|
|
sum = PyNumber_Add(sofar, prod); |
|
Py_DECREF(prod); |
|
if (sum == NULL) |
|
return NULL; |
|
|
|
if (fracpart == 0.0) |
|
return sum; |
|
/* So far we've lost no information. Dealing with the |
|
* fractional part requires float arithmetic, and may |
|
* lose a little info. |
|
*/ |
|
assert(PyInt_Check(factor) || PyLong_Check(factor)); |
|
if (PyInt_Check(factor)) |
|
dnum = (double)PyInt_AsLong(factor); |
|
else |
|
dnum = PyLong_AsDouble(factor); |
|
|
|
dnum *= fracpart; |
|
fracpart = modf(dnum, &intpart); |
|
x = PyLong_FromDouble(intpart); |
|
if (x == NULL) { |
|
Py_DECREF(sum); |
|
return NULL; |
|
} |
|
|
|
y = PyNumber_Add(sum, x); |
|
Py_DECREF(sum); |
|
Py_DECREF(x); |
|
*leftover += fracpart; |
|
return y; |
|
} |
|
|
|
PyErr_Format(PyExc_TypeError, |
|
"unsupported type for timedelta %s component: %s", |
|
tag, num->ob_type->tp_name); |
|
return NULL; |
|
} |
|
|
|
static PyObject * |
|
delta_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *self = NULL; |
|
|
|
/* Argument objects. */ |
|
PyObject *day = NULL; |
|
PyObject *second = NULL; |
|
PyObject *us = NULL; |
|
PyObject *ms = NULL; |
|
PyObject *minute = NULL; |
|
PyObject *hour = NULL; |
|
PyObject *week = NULL; |
|
|
|
PyObject *x = NULL; /* running sum of microseconds */ |
|
PyObject *y = NULL; /* temp sum of microseconds */ |
|
double leftover_us = 0.0; |
|
|
|
static char *keywords[] = { |
|
"days", "seconds", "microseconds", "milliseconds", |
|
"minutes", "hours", "weeks", NULL |
|
}; |
|
|
|
if (PyArg_ParseTupleAndKeywords(args, kw, "|OOOOOOO:__new__", |
|
keywords, |
|
&day, &second, &us, |
|
&ms, &minute, &hour, &week) == 0) |
|
goto Done; |
|
|
|
x = PyInt_FromLong(0); |
|
if (x == NULL) |
|
goto Done; |
|
|
|
#define CLEANUP \ |
|
Py_DECREF(x); \ |
|
x = y; \ |
|
if (x == NULL) \ |
|
goto Done |
|
|
|
if (us) { |
|
y = accum("microseconds", x, us, us_per_us, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (ms) { |
|
y = accum("milliseconds", x, ms, us_per_ms, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (second) { |
|
y = accum("seconds", x, second, us_per_second, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (minute) { |
|
y = accum("minutes", x, minute, us_per_minute, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (hour) { |
|
y = accum("hours", x, hour, us_per_hour, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (day) { |
|
y = accum("days", x, day, us_per_day, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (week) { |
|
y = accum("weeks", x, week, us_per_week, &leftover_us); |
|
CLEANUP; |
|
} |
|
if (leftover_us) { |
|
/* Round to nearest whole # of us, and add into x. */ |
|
PyObject *temp = PyLong_FromLong(round_to_long(leftover_us)); |
|
if (temp == NULL) { |
|
Py_DECREF(x); |
|
goto Done; |
|
} |
|
y = PyNumber_Add(x, temp); |
|
Py_DECREF(temp); |
|
CLEANUP; |
|
} |
|
|
|
self = microseconds_to_delta_ex(x, type); |
|
Py_DECREF(x); |
|
Done: |
|
return self; |
|
|
|
#undef CLEANUP |
|
} |
|
|
|
static int |
|
delta_nonzero(PyDateTime_Delta *self) |
|
{ |
|
return (GET_TD_DAYS(self) != 0 |
|
|| GET_TD_SECONDS(self) != 0 |
|
|| GET_TD_MICROSECONDS(self) != 0); |
|
} |
|
|
|
static PyObject * |
|
delta_repr(PyDateTime_Delta *self) |
|
{ |
|
if (GET_TD_MICROSECONDS(self) != 0) |
|
return PyString_FromFormat("%s(%d, %d, %d)", |
|
self->ob_type->tp_name, |
|
GET_TD_DAYS(self), |
|
GET_TD_SECONDS(self), |
|
GET_TD_MICROSECONDS(self)); |
|
if (GET_TD_SECONDS(self) != 0) |
|
return PyString_FromFormat("%s(%d, %d)", |
|
self->ob_type->tp_name, |
|
GET_TD_DAYS(self), |
|
GET_TD_SECONDS(self)); |
|
|
|
return PyString_FromFormat("%s(%d)", |
|
self->ob_type->tp_name, |
|
GET_TD_DAYS(self)); |
|
} |
|
|
|
static PyObject * |
|
delta_str(PyDateTime_Delta *self) |
|
{ |
|
int days = GET_TD_DAYS(self); |
|
int seconds = GET_TD_SECONDS(self); |
|
int us = GET_TD_MICROSECONDS(self); |
|
int hours; |
|
int minutes; |
|
char buf[100]; |
|
char *pbuf = buf; |
|
size_t buflen = sizeof(buf); |
|
int n; |
|
|
|
minutes = divmod(seconds, 60, &seconds); |
|
hours = divmod(minutes, 60, &minutes); |
|
|
|
if (days) { |
|
n = PyOS_snprintf(pbuf, buflen, "%d day%s, ", days, |
|
(days == 1 || days == -1) ? "" : "s"); |
|
if (n < 0 || (size_t)n >= buflen) |
|
goto Fail; |
|
pbuf += n; |
|
buflen -= (size_t)n; |
|
} |
|
|
|
n = PyOS_snprintf(pbuf, buflen, "%d:%02d:%02d", |
|
hours, minutes, seconds); |
|
if (n < 0 || (size_t)n >= buflen) |
|
goto Fail; |
|
pbuf += n; |
|
buflen -= (size_t)n; |
|
|
|
if (us) { |
|
n = PyOS_snprintf(pbuf, buflen, ".%06d", us); |
|
if (n < 0 || (size_t)n >= buflen) |
|
goto Fail; |
|
pbuf += n; |
|
} |
|
|
|
return PyString_FromStringAndSize(buf, pbuf - buf); |
|
|
|
Fail: |
|
PyErr_SetString(PyExc_SystemError, "goofy result from PyOS_snprintf"); |
|
return NULL; |
|
} |
|
|
|
/* Pickle support, a simple use of __reduce__. */ |
|
|
|
/* __getstate__ isn't exposed */ |
|
static PyObject * |
|
delta_getstate(PyDateTime_Delta *self) |
|
{ |
|
return Py_BuildValue("iii", GET_TD_DAYS(self), |
|
GET_TD_SECONDS(self), |
|
GET_TD_MICROSECONDS(self)); |
|
} |
|
|
|
static PyObject * |
|
delta_reduce(PyDateTime_Delta* self) |
|
{ |
|
return Py_BuildValue("ON", self->ob_type, delta_getstate(self)); |
|
} |
|
|
|
#define OFFSET(field) offsetof(PyDateTime_Delta, field) |
|
|
|
static PyMemberDef delta_members[] = { |
|
|
|
{"days", T_INT, OFFSET(days), READONLY, |
|
PyDoc_STR("Number of days.")}, |
|
|
|
{"seconds", T_INT, OFFSET(seconds), READONLY, |
|
PyDoc_STR("Number of seconds (>= 0 and less than 1 day).")}, |
|
|
|
{"microseconds", T_INT, OFFSET(microseconds), READONLY, |
|
PyDoc_STR("Number of microseconds (>= 0 and less than 1 second).")}, |
|
{NULL} |
|
}; |
|
|
|
static PyMethodDef delta_methods[] = { |
|
{"__reduce__", (PyCFunction)delta_reduce, METH_NOARGS, |
|
PyDoc_STR("__reduce__() -> (cls, state)")}, |
|
|
|
{NULL, NULL}, |
|
}; |
|
|
|
static char delta_doc[] = |
|
PyDoc_STR("Difference between two datetime values."); |
|
|
|
static PyNumberMethods delta_as_number = { |
|
delta_add, /* nb_add */ |
|
delta_subtract, /* nb_subtract */ |
|
delta_multiply, /* nb_multiply */ |
|
delta_divide, /* nb_divide */ |
|
0, /* nb_remainder */ |
|
0, /* nb_divmod */ |
|
0, /* nb_power */ |
|
(unaryfunc)delta_negative, /* nb_negative */ |
|
(unaryfunc)delta_positive, /* nb_positive */ |
|
(unaryfunc)delta_abs, /* nb_absolute */ |
|
(inquiry)delta_nonzero, /* nb_nonzero */ |
|
0, /*nb_invert*/ |
|
0, /*nb_lshift*/ |
|
0, /*nb_rshift*/ |
|
0, /*nb_and*/ |
|
0, /*nb_xor*/ |
|
0, /*nb_or*/ |
|
0, /*nb_coerce*/ |
|
0, /*nb_int*/ |
|
0, /*nb_long*/ |
|
0, /*nb_float*/ |
|
0, /*nb_oct*/ |
|
0, /*nb_hex*/ |
|
0, /*nb_inplace_add*/ |
|
0, /*nb_inplace_subtract*/ |
|
0, /*nb_inplace_multiply*/ |
|
0, /*nb_inplace_divide*/ |
|
0, /*nb_inplace_remainder*/ |
|
0, /*nb_inplace_power*/ |
|
0, /*nb_inplace_lshift*/ |
|
0, /*nb_inplace_rshift*/ |
|
0, /*nb_inplace_and*/ |
|
0, /*nb_inplace_xor*/ |
|
0, /*nb_inplace_or*/ |
|
delta_divide, /* nb_floor_divide */ |
|
0, /* nb_true_divide */ |
|
0, /* nb_inplace_floor_divide */ |
|
0, /* nb_inplace_true_divide */ |
|
}; |
|
|
|
static PyTypeObject PyDateTime_DeltaType = { |
|
PyObject_HEAD_INIT(NULL) |
|
0, /* ob_size */ |
|
"datetime.timedelta", /* tp_name */ |
|
sizeof(PyDateTime_Delta), /* tp_basicsize */ |
|
0, /* tp_itemsize */ |
|
0, /* tp_dealloc */ |
|
0, /* tp_print */ |
|
0, /* tp_getattr */ |
|
0, /* tp_setattr */ |
|
0, /* tp_compare */ |
|
(reprfunc)delta_repr, /* tp_repr */ |
|
&delta_as_number, /* tp_as_number */ |
|
0, /* tp_as_sequence */ |
|
0, /* tp_as_mapping */ |
|
(hashfunc)delta_hash, /* tp_hash */ |
|
0, /* tp_call */ |
|
(reprfunc)delta_str, /* tp_str */ |
|
PyObject_GenericGetAttr, /* tp_getattro */ |
|
0, /* tp_setattro */ |
|
0, /* tp_as_buffer */ |
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES | |
|
Py_TPFLAGS_BASETYPE, /* tp_flags */ |
|
delta_doc, /* tp_doc */ |
|
0, /* tp_traverse */ |
|
0, /* tp_clear */ |
|
(richcmpfunc)delta_richcompare, /* tp_richcompare */ |
|
0, /* tp_weaklistoffset */ |
|
0, /* tp_iter */ |
|
0, /* tp_iternext */ |
|
delta_methods, /* tp_methods */ |
|
delta_members, /* tp_members */ |
|
0, /* tp_getset */ |
|
0, /* tp_base */ |
|
0, /* tp_dict */ |
|
0, /* tp_descr_get */ |
|
0, /* tp_descr_set */ |
|
0, /* tp_dictoffset */ |
|
0, /* tp_init */ |
|
0, /* tp_alloc */ |
|
delta_new, /* tp_new */ |
|
0, /* tp_free */ |
|
}; |
|
|
|
/* |
|
* PyDateTime_Date implementation. |
|
*/ |
|
|
|
/* Accessor properties. */ |
|
|
|
static PyObject * |
|
date_year(PyDateTime_Date *self, void *unused) |
|
{ |
|
return PyInt_FromLong(GET_YEAR(self)); |
|
} |
|
|
|
static PyObject * |
|
date_month(PyDateTime_Date *self, void *unused) |
|
{ |
|
return PyInt_FromLong(GET_MONTH(self)); |
|
} |
|
|
|
static PyObject * |
|
date_day(PyDateTime_Date *self, void *unused) |
|
{ |
|
return PyInt_FromLong(GET_DAY(self)); |
|
} |
|
|
|
static PyGetSetDef date_getset[] = { |
|
{"year", (getter)date_year}, |
|
{"month", (getter)date_month}, |
|
{"day", (getter)date_day}, |
|
{NULL} |
|
}; |
|
|
|
/* Constructors. */ |
|
|
|
static char *date_kws[] = {"year", "month", "day", NULL}; |
|
|
|
static PyObject * |
|
date_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *self = NULL; |
|
PyObject *state; |
|
int year; |
|
int month; |
|
int day; |
|
|
|
/* Check for invocation from pickle with __getstate__ state */ |
|
if (PyTuple_GET_SIZE(args) == 1 && |
|
PyString_Check(state = PyTuple_GET_ITEM(args, 0)) && |
|
PyString_GET_SIZE(state) == _PyDateTime_DATE_DATASIZE) |
|
{ |
|
PyDateTime_Date *me; |
|
|
|
me = PyObject_New(PyDateTime_Date, type); |
|
if (me != NULL) { |
|
char *pdata = PyString_AS_STRING(state); |
|
memcpy(me->data, pdata, _PyDateTime_DATE_DATASIZE); |
|
me->hashcode = -1; |
|
} |
|
return (PyObject *)me; |
|
} |
|
|
|
if (PyArg_ParseTupleAndKeywords(args, kw, "iii", date_kws, |
|
&year, &month, &day)) { |
|
if (check_date_args(year, month, day) < 0) |
|
return NULL; |
|
self = new_date_ex(year, month, day, type); |
|
} |
|
return self; |
|
} |
|
|
|
/* Return new date from localtime(t). */ |
|
static PyObject * |
|
date_local_from_time_t(PyObject *cls, time_t t) |
|
{ |
|
struct tm *tm; |
|
PyObject *result = NULL; |
|
|
|
tm = localtime(&t); |
|
if (tm) |
|
result = PyObject_CallFunction(cls, "iii", |
|
tm->tm_year + 1900, |
|
tm->tm_mon + 1, |
|
tm->tm_mday); |
|
else |
|
PyErr_SetString(PyExc_ValueError, |
|
"timestamp out of range for " |
|
"platform localtime() function"); |
|
return result; |
|
} |
|
|
|
/* Return new date from current time. |
|
* We say this is equivalent to fromtimestamp(time.time()), and the |
|
* only way to be sure of that is to *call* time.time(). That's not |
|
* generally the same as calling C's time. |
|
*/ |
|
static PyObject * |
|
date_today(PyObject *cls, PyObject *dummy) |
|
{ |
|
PyObject *time; |
|
PyObject *result; |
|
|
|
time = time_time(); |
|
if (time == NULL) |
|
return NULL; |
|
|
|
/* Note well: today() is a class method, so this may not call |
|
* date.fromtimestamp. For example, it may call |
|
* datetime.fromtimestamp. That's why we need all the accuracy |
|
* time.time() delivers; if someone were gonzo about optimization, |
|
* date.today() could get away with plain C time(). |
|
*/ |
|
result = PyObject_CallMethod(cls, "fromtimestamp", "O", time); |
|
Py_DECREF(time); |
|
return result; |
|
} |
|
|
|
/* Return new date from given timestamp (Python timestamp -- a double). */ |
|
static PyObject * |
|
date_fromtimestamp(PyObject *cls, PyObject *args) |
|
{ |
|
double timestamp; |
|
PyObject *result = NULL; |
|
|
|
if (PyArg_ParseTuple(args, "d:fromtimestamp", ×tamp)) |
|
result = date_local_from_time_t(cls, (time_t)timestamp); |
|
return result; |
|
} |
|
|
|
/* Return new date from proleptic Gregorian ordinal. Raises ValueError if |
|
* the ordinal is out of range. |
|
*/ |
|
static PyObject * |
|
date_fromordinal(PyObject *cls, PyObject *args) |
|
{ |
|
PyObject *result = NULL; |
|
int ordinal; |
|
|
|
if (PyArg_ParseTuple(args, "i:fromordinal", &ordinal)) { |
|
int year; |
|
int month; |
|
int day; |
|
|
|
if (ordinal < 1) |
|
PyErr_SetString(PyExc_ValueError, "ordinal must be " |
|
">= 1"); |
|
else { |
|
ord_to_ymd(ordinal, &year, &month, &day); |
|
result = PyObject_CallFunction(cls, "iii", |
|
year, month, day); |
|
} |
|
} |
|
return result; |
|
} |
|
|
|
/* |
|
* Date arithmetic. |
|
*/ |
|
|
|
/* date + timedelta -> date. If arg negate is true, subtract the timedelta |
|
* instead. |
|
*/ |
|
static PyObject * |
|
add_date_timedelta(PyDateTime_Date *date, PyDateTime_Delta *delta, int negate) |
|
{ |
|
PyObject *result = NULL; |
|
int year = GET_YEAR(date); |
|
int month = GET_MONTH(date); |
|
int deltadays = GET_TD_DAYS(delta); |
|
/* C-level overflow is impossible because |deltadays| < 1e9. */ |
|
int day = GET_DAY(date) + (negate ? -deltadays : deltadays); |
|
|
|
if (normalize_date(&year, &month, &day) >= 0) |
|
result = new_date(year, month, day); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
date_add(PyObject *left, PyObject *right) |
|
{ |
|
if (PyDateTime_Check(left) || PyDateTime_Check(right)) { |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
if (PyDate_Check(left)) { |
|
/* date + ??? */ |
|
if (PyDelta_Check(right)) |
|
/* date + delta */ |
|
return add_date_timedelta((PyDateTime_Date *) left, |
|
(PyDateTime_Delta *) right, |
|
0); |
|
} |
|
else { |
|
/* ??? + date |
|
* 'right' must be one of us, or we wouldn't have been called |
|
*/ |
|
if (PyDelta_Check(left)) |
|
/* delta + date */ |
|
return add_date_timedelta((PyDateTime_Date *) right, |
|
(PyDateTime_Delta *) left, |
|
0); |
|
} |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
|
|
static PyObject * |
|
date_subtract(PyObject *left, PyObject *right) |
|
{ |
|
if (PyDateTime_Check(left) || PyDateTime_Check(right)) { |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
if (PyDate_Check(left)) { |
|
if (PyDate_Check(right)) { |
|
/* date - date */ |
|
int left_ord = ymd_to_ord(GET_YEAR(left), |
|
GET_MONTH(left), |
|
GET_DAY(left)); |
|
int right_ord = ymd_to_ord(GET_YEAR(right), |
|
GET_MONTH(right), |
|
GET_DAY(right)); |
|
return new_delta(left_ord - right_ord, 0, 0, 0); |
|
} |
|
if (PyDelta_Check(right)) { |
|
/* date - delta */ |
|
return add_date_timedelta((PyDateTime_Date *) left, |
|
(PyDateTime_Delta *) right, |
|
1); |
|
} |
|
} |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
|
|
|
|
/* Various ways to turn a date into a string. */ |
|
|
|
static PyObject * |
|
date_repr(PyDateTime_Date *self) |
|
{ |
|
char buffer[1028]; |
|
char *typename; |
|
|
|
typename = self->ob_type->tp_name; |
|
PyOS_snprintf(buffer, sizeof(buffer), "%s(%d, %d, %d)", |
|
typename, |
|
GET_YEAR(self), GET_MONTH(self), GET_DAY(self)); |
|
|
|
return PyString_FromString(buffer); |
|
} |
|
|
|
static PyObject * |
|
date_isoformat(PyDateTime_Date *self) |
|
{ |
|
char buffer[128]; |
|
|
|
isoformat_date(self, buffer, sizeof(buffer)); |
|
return PyString_FromString(buffer); |
|
} |
|
|
|
/* str() calls the appropriate isoformat() method. */ |
|
static PyObject * |
|
date_str(PyDateTime_Date *self) |
|
{ |
|
return PyObject_CallMethod((PyObject *)self, "isoformat", "()"); |
|
} |
|
|
|
|
|
static PyObject * |
|
date_ctime(PyDateTime_Date *self) |
|
{ |
|
return format_ctime(self, 0, 0, 0); |
|
} |
|
|
|
static PyObject * |
|
date_strftime(PyDateTime_Date *self, PyObject *args, PyObject *kw) |
|
{ |
|
/* This method can be inherited, and needs to call the |
|
* timetuple() method appropriate to self's class. |
|
*/ |
|
PyObject *result; |
|
PyObject *format; |
|
PyObject *tuple; |
|
static char *keywords[] = {"format", NULL}; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "O!:strftime", keywords, |
|
&PyString_Type, &format)) |
|
return NULL; |
|
|
|
tuple = PyObject_CallMethod((PyObject *)self, "timetuple", "()"); |
|
if (tuple == NULL) |
|
return NULL; |
|
result = wrap_strftime((PyObject *)self, format, tuple, |
|
(PyObject *)self); |
|
Py_DECREF(tuple); |
|
return result; |
|
} |
|
|
|
/* ISO methods. */ |
|
|
|
static PyObject * |
|
date_isoweekday(PyDateTime_Date *self) |
|
{ |
|
int dow = weekday(GET_YEAR(self), GET_MONTH(self), GET_DAY(self)); |
|
|
|
return PyInt_FromLong(dow + 1); |
|
} |
|
|
|
static PyObject * |
|
date_isocalendar(PyDateTime_Date *self) |
|
{ |
|
int year = GET_YEAR(self); |
|
int week1_monday = iso_week1_monday(year); |
|
int today = ymd_to_ord(year, GET_MONTH(self), GET_DAY(self)); |
|
int week; |
|
int day; |
|
|
|
week = divmod(today - week1_monday, 7, &day); |
|
if (week < 0) { |
|
--year; |
|
week1_monday = iso_week1_monday(year); |
|
week = divmod(today - week1_monday, 7, &day); |
|
} |
|
else if (week >= 52 && today >= iso_week1_monday(year + 1)) { |
|
++year; |
|
week = 0; |
|
} |
|
return Py_BuildValue("iii", year, week + 1, day + 1); |
|
} |
|
|
|
/* Miscellaneous methods. */ |
|
|
|
/* This is more natural as a tp_compare, but doesn't work then: for whatever |
|
* reason, Python's try_3way_compare ignores tp_compare unless |
|
* PyInstance_Check returns true, but these aren't old-style classes. |
|
*/ |
|
static PyObject * |
|
date_richcompare(PyDateTime_Date *self, PyObject *other, int op) |
|
{ |
|
int diff = 42; /* nonsense */ |
|
|
|
if (PyDate_Check(other)) |
|
diff = memcmp(self->data, ((PyDateTime_Date *)other)->data, |
|
_PyDateTime_DATE_DATASIZE); |
|
|
|
else if (PyObject_HasAttrString(other, "timetuple")) { |
|
/* A hook for other kinds of date objects. */ |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
else if (op == Py_EQ || op == Py_NE) |
|
diff = 1; /* any non-zero value will do */ |
|
|
|
else /* stop this from falling back to address comparison */ |
|
return cmperror((PyObject *)self, other); |
|
|
|
return diff_to_bool(diff, op); |
|
} |
|
|
|
static PyObject * |
|
date_timetuple(PyDateTime_Date *self) |
|
{ |
|
return build_struct_time(GET_YEAR(self), |
|
GET_MONTH(self), |
|
GET_DAY(self), |
|
0, 0, 0, -1); |
|
} |
|
|
|
static PyObject * |
|
date_replace(PyDateTime_Date *self, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *clone; |
|
PyObject *tuple; |
|
int year = GET_YEAR(self); |
|
int month = GET_MONTH(self); |
|
int day = GET_DAY(self); |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "|iii:replace", date_kws, |
|
&year, &month, &day)) |
|
return NULL; |
|
tuple = Py_BuildValue("iii", year, month, day); |
|
if (tuple == NULL) |
|
return NULL; |
|
clone = date_new(self->ob_type, tuple, NULL); |
|
Py_DECREF(tuple); |
|
return clone; |
|
} |
|
|
|
static PyObject *date_getstate(PyDateTime_Date *self); |
|
|
|
static long |
|
date_hash(PyDateTime_Date *self) |
|
{ |
|
if (self->hashcode == -1) { |
|
PyObject *temp = date_getstate(self); |
|
if (temp != NULL) { |
|
self->hashcode = PyObject_Hash(temp); |
|
Py_DECREF(temp); |
|
} |
|
} |
|
return self->hashcode; |
|
} |
|
|
|
static PyObject * |
|
date_toordinal(PyDateTime_Date *self) |
|
{ |
|
return PyInt_FromLong(ymd_to_ord(GET_YEAR(self), GET_MONTH(self), |
|
GET_DAY(self))); |
|
} |
|
|
|
static PyObject * |
|
date_weekday(PyDateTime_Date *self) |
|
{ |
|
int dow = weekday(GET_YEAR(self), GET_MONTH(self), GET_DAY(self)); |
|
|
|
return PyInt_FromLong(dow); |
|
} |
|
|
|
/* Pickle support, a simple use of __reduce__. */ |
|
|
|
/* __getstate__ isn't exposed */ |
|
static PyObject * |
|
date_getstate(PyDateTime_Date *self) |
|
{ |
|
return Py_BuildValue( |
|
"(N)", |
|
PyString_FromStringAndSize((char *)self->data, |
|
_PyDateTime_DATE_DATASIZE)); |
|
} |
|
|
|
static PyObject * |
|
date_reduce(PyDateTime_Date *self, PyObject *arg) |
|
{ |
|
return Py_BuildValue("(ON)", self->ob_type, date_getstate(self)); |
|
} |
|
|
|
static PyMethodDef date_methods[] = { |
|
|
|
/* Class methods: */ |
|
|
|
{"fromtimestamp", (PyCFunction)date_fromtimestamp, METH_VARARGS | |
|
METH_CLASS, |
|
PyDoc_STR("timestamp -> local date from a POSIX timestamp (like " |
|
"time.time()).")}, |
|
|
|
{"fromordinal", (PyCFunction)date_fromordinal, METH_VARARGS | |
|
METH_CLASS, |
|
PyDoc_STR("int -> date corresponding to a proleptic Gregorian " |
|
"ordinal.")}, |
|
|
|
{"today", (PyCFunction)date_today, METH_NOARGS | METH_CLASS, |
|
PyDoc_STR("Current date or datetime: same as " |
|
"self.__class__.fromtimestamp(time.time()).")}, |
|
|
|
/* Instance methods: */ |
|
|
|
{"ctime", (PyCFunction)date_ctime, METH_NOARGS, |
|
PyDoc_STR("Return ctime() style string.")}, |
|
|
|
{"strftime", (PyCFunction)date_strftime, METH_KEYWORDS, |
|
PyDoc_STR("format -> strftime() style string.")}, |
|
|
|
{"timetuple", (PyCFunction)date_timetuple, METH_NOARGS, |
|
PyDoc_STR("Return time tuple, compatible with time.localtime().")}, |
|
|
|
{"isocalendar", (PyCFunction)date_isocalendar, METH_NOARGS, |
|
PyDoc_STR("Return a 3-tuple containing ISO year, week number, and " |
|
"weekday.")}, |
|
|
|
{"isoformat", (PyCFunction)date_isoformat, METH_NOARGS, |
|
PyDoc_STR("Return string in ISO 8601 format, YYYY-MM-DD.")}, |
|
|
|
{"isoweekday", (PyCFunction)date_isoweekday, METH_NOARGS, |
|
PyDoc_STR("Return the day of the week represented by the date.\n" |
|
"Monday == 1 ... Sunday == 7")}, |
|
|
|
{"toordinal", (PyCFunction)date_toordinal, METH_NOARGS, |
|
PyDoc_STR("Return proleptic Gregorian ordinal. January 1 of year " |
|
"1 is day 1.")}, |
|
|
|
{"weekday", (PyCFunction)date_weekday, METH_NOARGS, |
|
PyDoc_STR("Return the day of the week represented by the date.\n" |
|
"Monday == 0 ... Sunday == 6")}, |
|
|
|
{"replace", (PyCFunction)date_replace, METH_KEYWORDS, |
|
PyDoc_STR("Return date with new specified fields.")}, |
|
|
|
{"__reduce__", (PyCFunction)date_reduce, METH_NOARGS, |
|
PyDoc_STR("__reduce__() -> (cls, state)")}, |
|
|
|
{NULL, NULL} |
|
}; |
|
|
|
static char date_doc[] = |
|
PyDoc_STR("Basic date type."); |
|
|
|
static PyNumberMethods date_as_number = { |
|
date_add, /* nb_add */ |
|
date_subtract, /* nb_subtract */ |
|
0, /* nb_multiply */ |
|
0, /* nb_divide */ |
|
0, /* nb_remainder */ |
|
0, /* nb_divmod */ |
|
0, /* nb_power */ |
|
0, /* nb_negative */ |
|
0, /* nb_positive */ |
|
0, /* nb_absolute */ |
|
0, /* nb_nonzero */ |
|
}; |
|
|
|
static PyTypeObject PyDateTime_DateType = { |
|
PyObject_HEAD_INIT(NULL) |
|
0, /* ob_size */ |
|
"datetime.date", /* tp_name */ |
|
sizeof(PyDateTime_Date), /* tp_basicsize */ |
|
0, /* tp_itemsize */ |
|
0, /* tp_dealloc */ |
|
0, /* tp_print */ |
|
0, /* tp_getattr */ |
|
0, /* tp_setattr */ |
|
0, /* tp_compare */ |
|
(reprfunc)date_repr, /* tp_repr */ |
|
&date_as_number, /* tp_as_number */ |
|
0, /* tp_as_sequence */ |
|
0, /* tp_as_mapping */ |
|
(hashfunc)date_hash, /* tp_hash */ |
|
0, /* tp_call */ |
|
(reprfunc)date_str, /* tp_str */ |
|
PyObject_GenericGetAttr, /* tp_getattro */ |
|
0, /* tp_setattro */ |
|
0, /* tp_as_buffer */ |
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES | |
|
Py_TPFLAGS_BASETYPE, /* tp_flags */ |
|
date_doc, /* tp_doc */ |
|
0, /* tp_traverse */ |
|
0, /* tp_clear */ |
|
(richcmpfunc)date_richcompare, /* tp_richcompare */ |
|
0, /* tp_weaklistoffset */ |
|
0, /* tp_iter */ |
|
0, /* tp_iternext */ |
|
date_methods, /* tp_methods */ |
|
0, /* tp_members */ |
|
date_getset, /* tp_getset */ |
|
0, /* tp_base */ |
|
0, /* tp_dict */ |
|
0, /* tp_descr_get */ |
|
0, /* tp_descr_set */ |
|
0, /* tp_dictoffset */ |
|
0, /* tp_init */ |
|
0, /* tp_alloc */ |
|
date_new, /* tp_new */ |
|
0, /* tp_free */ |
|
}; |
|
|
|
/* |
|
* PyDateTime_TZInfo implementation. |
|
*/ |
|
|
|
/* This is a pure abstract base class, so doesn't do anything beyond |
|
* raising NotImplemented exceptions. Real tzinfo classes need |
|
* to derive from this. This is mostly for clarity, and for efficiency in |
|
* datetime and time constructors (their tzinfo arguments need to |
|
* be subclasses of this tzinfo class, which is easy and quick to check). |
|
* |
|
* Note: For reasons having to do with pickling of subclasses, we have |
|
* to allow tzinfo objects to be instantiated. This wasn't an issue |
|
* in the Python implementation (__init__() could raise NotImplementedError |
|
* there without ill effect), but doing so in the C implementation hit a |
|
* brick wall. |
|
*/ |
|
|
|
static PyObject * |
|
tzinfo_nogo(const char* methodname) |
|
{ |
|
PyErr_Format(PyExc_NotImplementedError, |
|
"a tzinfo subclass must implement %s()", |
|
methodname); |
|
return NULL; |
|
} |
|
|
|
/* Methods. A subclass must implement these. */ |
|
|
|
static PyObject * |
|
tzinfo_tzname(PyDateTime_TZInfo *self, PyObject *dt) |
|
{ |
|
return tzinfo_nogo("tzname"); |
|
} |
|
|
|
static PyObject * |
|
tzinfo_utcoffset(PyDateTime_TZInfo *self, PyObject *dt) |
|
{ |
|
return tzinfo_nogo("utcoffset"); |
|
} |
|
|
|
static PyObject * |
|
tzinfo_dst(PyDateTime_TZInfo *self, PyObject *dt) |
|
{ |
|
return tzinfo_nogo("dst"); |
|
} |
|
|
|
static PyObject * |
|
tzinfo_fromutc(PyDateTime_TZInfo *self, PyDateTime_DateTime *dt) |
|
{ |
|
int y, m, d, hh, mm, ss, us; |
|
|
|
PyObject *result; |
|
int off, dst; |
|
int none; |
|
int delta; |
|
|
|
if (! PyDateTime_Check(dt)) { |
|
PyErr_SetString(PyExc_TypeError, |
|
"fromutc: argument must be a datetime"); |
|
return NULL; |
|
} |
|
if (! HASTZINFO(dt) || dt->tzinfo != (PyObject *)self) { |
|
PyErr_SetString(PyExc_ValueError, "fromutc: dt.tzinfo " |
|
"is not self"); |
|
return NULL; |
|
} |
|
|
|
off = call_utcoffset(dt->tzinfo, (PyObject *)dt, &none); |
|
if (off == -1 && PyErr_Occurred()) |
|
return NULL; |
|
if (none) { |
|
PyErr_SetString(PyExc_ValueError, "fromutc: non-None " |
|
"utcoffset() result required"); |
|
return NULL; |
|
} |
|
|
|
dst = call_dst(dt->tzinfo, (PyObject *)dt, &none); |
|
if (dst == -1 && PyErr_Occurred()) |
|
return NULL; |
|
if (none) { |
|
PyErr_SetString(PyExc_ValueError, "fromutc: non-None " |
|
"dst() result required"); |
|
return NULL; |
|
} |
|
|
|
y = GET_YEAR(dt); |
|
m = GET_MONTH(dt); |
|
d = GET_DAY(dt); |
|
hh = DATE_GET_HOUR(dt); |
|
mm = DATE_GET_MINUTE(dt); |
|
ss = DATE_GET_SECOND(dt); |
|
us = DATE_GET_MICROSECOND(dt); |
|
|
|
delta = off - dst; |
|
mm += delta; |
|
if ((mm < 0 || mm >= 60) && |
|
normalize_datetime(&y, &m, &d, &hh, &mm, &ss, &us) < 0) |
|
return NULL; |
|
result = new_datetime(y, m, d, hh, mm, ss, us, dt->tzinfo); |
|
if (result == NULL) |
|
return result; |
|
|
|
dst = call_dst(dt->tzinfo, result, &none); |
|
if (dst == -1 && PyErr_Occurred()) |
|
goto Fail; |
|
if (none) |
|
goto Inconsistent; |
|
if (dst == 0) |
|
return result; |
|
|
|
mm += dst; |
|
if ((mm < 0 || mm >= 60) && |
|
normalize_datetime(&y, &m, &d, &hh, &mm, &ss, &us) < 0) |
|
goto Fail; |
|
Py_DECREF(result); |
|
result = new_datetime(y, m, d, hh, mm, ss, us, dt->tzinfo); |
|
return result; |
|
|
|
Inconsistent: |
|
PyErr_SetString(PyExc_ValueError, "fromutc: tz.dst() gave" |
|
"inconsistent results; cannot convert"); |
|
|
|
/* fall thru to failure */ |
|
Fail: |
|
Py_DECREF(result); |
|
return NULL; |
|
} |
|
|
|
/* |
|
* Pickle support. This is solely so that tzinfo subclasses can use |
|
* pickling -- tzinfo itself is supposed to be uninstantiable. |
|
*/ |
|
|
|
static PyObject * |
|
tzinfo_reduce(PyObject *self) |
|
{ |
|
PyObject *args, *state, *tmp; |
|
PyObject *getinitargs, *getstate; |
|
|
|
tmp = PyTuple_New(0); |
|
if (tmp == NULL) |
|
return NULL; |
|
|
|
getinitargs = PyObject_GetAttrString(self, "__getinitargs__"); |
|
if (getinitargs != NULL) { |
|
args = PyObject_CallObject(getinitargs, tmp); |
|
Py_DECREF(getinitargs); |
|
if (args == NULL) { |
|
Py_DECREF(tmp); |
|
return NULL; |
|
} |
|
} |
|
else { |
|
PyErr_Clear(); |
|
args = tmp; |
|
Py_INCREF(args); |
|
} |
|
|
|
getstate = PyObject_GetAttrString(self, "__getstate__"); |
|
if (getstate != NULL) { |
|
state = PyObject_CallObject(getstate, tmp); |
|
Py_DECREF(getstate); |
|
if (state == NULL) { |
|
Py_DECREF(args); |
|
Py_DECREF(tmp); |
|
return NULL; |
|
} |
|
} |
|
else { |
|
PyObject **dictptr; |
|
PyErr_Clear(); |
|
state = Py_None; |
|
dictptr = _PyObject_GetDictPtr(self); |
|
if (dictptr && *dictptr && PyDict_Size(*dictptr)) |
|
state = *dictptr; |
|
Py_INCREF(state); |
|
} |
|
|
|
Py_DECREF(tmp); |
|
|
|
if (state == Py_None) { |
|
Py_DECREF(state); |
|
return Py_BuildValue("(ON)", self->ob_type, args); |
|
} |
|
else |
|
return Py_BuildValue("(ONN)", self->ob_type, args, state); |
|
} |
|
|
|
static PyMethodDef tzinfo_methods[] = { |
|
|
|
{"tzname", (PyCFunction)tzinfo_tzname, METH_O, |
|
PyDoc_STR("datetime -> string name of time zone.")}, |
|
|
|
{"utcoffset", (PyCFunction)tzinfo_utcoffset, METH_O, |
|
PyDoc_STR("datetime -> minutes east of UTC (negative for " |
|
"west of UTC).")}, |
|
|
|
{"dst", (PyCFunction)tzinfo_dst, METH_O, |
|
PyDoc_STR("datetime -> DST offset in minutes east of UTC.")}, |
|
|
|
{"fromutc", (PyCFunction)tzinfo_fromutc, METH_O, |
|
PyDoc_STR("datetime in UTC -> datetime in local time.")}, |
|
|
|
{"__reduce__", (PyCFunction)tzinfo_reduce, METH_NOARGS, |
|
PyDoc_STR("-> (cls, state)")}, |
|
|
|
{NULL, NULL} |
|
}; |
|
|
|
static char tzinfo_doc[] = |
|
PyDoc_STR("Abstract base class for time zone info objects."); |
|
|
|
statichere PyTypeObject PyDateTime_TZInfoType = { |
|
PyObject_HEAD_INIT(NULL) |
|
0, /* ob_size */ |
|
"datetime.tzinfo", /* tp_name */ |
|
sizeof(PyDateTime_TZInfo), /* tp_basicsize */ |
|
0, /* tp_itemsize */ |
|
0, /* tp_dealloc */ |
|
0, /* tp_print */ |
|
0, /* tp_getattr */ |
|
0, /* tp_setattr */ |
|
0, /* tp_compare */ |
|
0, /* tp_repr */ |
|
0, /* tp_as_number */ |
|
0, /* tp_as_sequence */ |
|
0, /* tp_as_mapping */ |
|
0, /* tp_hash */ |
|
0, /* tp_call */ |
|
0, /* tp_str */ |
|
PyObject_GenericGetAttr, /* tp_getattro */ |
|
0, /* tp_setattro */ |
|
0, /* tp_as_buffer */ |
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES | |
|
Py_TPFLAGS_BASETYPE, /* tp_flags */ |
|
tzinfo_doc, /* tp_doc */ |
|
0, /* tp_traverse */ |
|
0, /* tp_clear */ |
|
0, /* tp_richcompare */ |
|
0, /* tp_weaklistoffset */ |
|
0, /* tp_iter */ |
|
0, /* tp_iternext */ |
|
tzinfo_methods, /* tp_methods */ |
|
0, /* tp_members */ |
|
0, /* tp_getset */ |
|
0, /* tp_base */ |
|
0, /* tp_dict */ |
|
0, /* tp_descr_get */ |
|
0, /* tp_descr_set */ |
|
0, /* tp_dictoffset */ |
|
0, /* tp_init */ |
|
0, /* tp_alloc */ |
|
PyType_GenericNew, /* tp_new */ |
|
0, /* tp_free */ |
|
}; |
|
|
|
/* |
|
* PyDateTime_Time implementation. |
|
*/ |
|
|
|
/* Accessor properties. |
|
*/ |
|
|
|
static PyObject * |
|
time_hour(PyDateTime_Time *self, void *unused) |
|
{ |
|
return PyInt_FromLong(TIME_GET_HOUR(self)); |
|
} |
|
|
|
static PyObject * |
|
time_minute(PyDateTime_Time *self, void *unused) |
|
{ |
|
return PyInt_FromLong(TIME_GET_MINUTE(self)); |
|
} |
|
|
|
/* The name time_second conflicted with some platform header file. */ |
|
static PyObject * |
|
py_time_second(PyDateTime_Time *self, void *unused) |
|
{ |
|
return PyInt_FromLong(TIME_GET_SECOND(self)); |
|
} |
|
|
|
static PyObject * |
|
time_microsecond(PyDateTime_Time *self, void *unused) |
|
{ |
|
return PyInt_FromLong(TIME_GET_MICROSECOND(self)); |
|
} |
|
|
|
static PyObject * |
|
time_tzinfo(PyDateTime_Time *self, void *unused) |
|
{ |
|
PyObject *result = HASTZINFO(self) ? self->tzinfo : Py_None; |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
static PyGetSetDef time_getset[] = { |
|
{"hour", (getter)time_hour}, |
|
{"minute", (getter)time_minute}, |
|
{"second", (getter)py_time_second}, |
|
{"microsecond", (getter)time_microsecond}, |
|
{"tzinfo", (getter)time_tzinfo}, |
|
{NULL} |
|
}; |
|
|
|
/* |
|
* Constructors. |
|
*/ |
|
|
|
static char *time_kws[] = {"hour", "minute", "second", "microsecond", |
|
"tzinfo", NULL}; |
|
|
|
static PyObject * |
|
time_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *self = NULL; |
|
PyObject *state; |
|
int hour = 0; |
|
int minute = 0; |
|
int second = 0; |
|
int usecond = 0; |
|
PyObject *tzinfo = Py_None; |
|
|
|
/* Check for invocation from pickle with __getstate__ state */ |
|
if (PyTuple_GET_SIZE(args) >= 1 && |
|
PyTuple_GET_SIZE(args) <= 2 && |
|
PyString_Check(state = PyTuple_GET_ITEM(args, 0)) && |
|
PyString_GET_SIZE(state) == _PyDateTime_TIME_DATASIZE) |
|
{ |
|
PyDateTime_Time *me; |
|
char aware; |
|
|
|
if (PyTuple_GET_SIZE(args) == 2) { |
|
tzinfo = PyTuple_GET_ITEM(args, 1); |
|
if (check_tzinfo_subclass(tzinfo) < 0) { |
|
PyErr_SetString(PyExc_TypeError, "bad " |
|
"tzinfo state arg"); |
|
return NULL; |
|
} |
|
} |
|
aware = (char)(tzinfo != Py_None); |
|
me = (PyDateTime_Time *) time_alloc(&PyDateTime_TimeType, |
|
aware); |
|
if (me != NULL) { |
|
char *pdata = PyString_AS_STRING(state); |
|
|
|
memcpy(me->data, pdata, _PyDateTime_TIME_DATASIZE); |
|
me->hashcode = -1; |
|
me->hastzinfo = aware; |
|
if (aware) { |
|
Py_INCREF(tzinfo); |
|
me->tzinfo = tzinfo; |
|
} |
|
} |
|
return (PyObject *)me; |
|
} |
|
|
|
if (PyArg_ParseTupleAndKeywords(args, kw, "|iiiiO", time_kws, |
|
&hour, &minute, &second, &usecond, |
|
&tzinfo)) { |
|
if (check_time_args(hour, minute, second, usecond) < 0) |
|
return NULL; |
|
if (check_tzinfo_subclass(tzinfo) < 0) |
|
return NULL; |
|
self = new_time_ex(hour, minute, second, usecond, tzinfo, |
|
type); |
|
} |
|
return self; |
|
} |
|
|
|
/* |
|
* Destructor. |
|
*/ |
|
|
|
static void |
|
time_dealloc(PyDateTime_Time *self) |
|
{ |
|
if (HASTZINFO(self)) { |
|
Py_XDECREF(self->tzinfo); |
|
} |
|
self->ob_type->tp_free((PyObject *)self); |
|
} |
|
|
|
/* |
|
* Indirect access to tzinfo methods. |
|
*/ |
|
|
|
/* These are all METH_NOARGS, so don't need to check the arglist. */ |
|
static PyObject * |
|
time_utcoffset(PyDateTime_Time *self, PyObject *unused) { |
|
return offset_as_timedelta(HASTZINFO(self) ? self->tzinfo : Py_None, |
|
"utcoffset", Py_None); |
|
} |
|
|
|
static PyObject * |
|
time_dst(PyDateTime_Time *self, PyObject *unused) { |
|
return offset_as_timedelta(HASTZINFO(self) ? self->tzinfo : Py_None, |
|
"dst", Py_None); |
|
} |
|
|
|
static PyObject * |
|
time_tzname(PyDateTime_Time *self, PyObject *unused) { |
|
return call_tzname(HASTZINFO(self) ? self->tzinfo : Py_None, |
|
Py_None); |
|
} |
|
|
|
/* |
|
* Various ways to turn a time into a string. |
|
*/ |
|
|
|
static PyObject * |
|
time_repr(PyDateTime_Time *self) |
|
{ |
|
char buffer[100]; |
|
char *typename = self->ob_type->tp_name; |
|
int h = TIME_GET_HOUR(self); |
|
int m = TIME_GET_MINUTE(self); |
|
int s = TIME_GET_SECOND(self); |
|
int us = TIME_GET_MICROSECOND(self); |
|
PyObject *result = NULL; |
|
|
|
if (us) |
|
PyOS_snprintf(buffer, sizeof(buffer), |
|
"%s(%d, %d, %d, %d)", typename, h, m, s, us); |
|
else if (s) |
|
PyOS_snprintf(buffer, sizeof(buffer), |
|
"%s(%d, %d, %d)", typename, h, m, s); |
|
else |
|
PyOS_snprintf(buffer, sizeof(buffer), |
|
"%s(%d, %d)", typename, h, m); |
|
result = PyString_FromString(buffer); |
|
if (result != NULL && HASTZINFO(self)) |
|
result = append_keyword_tzinfo(result, self->tzinfo); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
time_str(PyDateTime_Time *self) |
|
{ |
|
return PyObject_CallMethod((PyObject *)self, "isoformat", "()"); |
|
} |
|
|
|
static PyObject * |
|
time_isoformat(PyDateTime_Time *self) |
|
{ |
|
char buf[100]; |
|
PyObject *result; |
|
/* Reuse the time format code from the datetime type. */ |
|
PyDateTime_DateTime datetime; |
|
PyDateTime_DateTime *pdatetime = &datetime; |
|
|
|
/* Copy over just the time bytes. */ |
|
memcpy(pdatetime->data + _PyDateTime_DATE_DATASIZE, |
|
self->data, |
|
_PyDateTime_TIME_DATASIZE); |
|
|
|
isoformat_time(pdatetime, buf, sizeof(buf)); |
|
result = PyString_FromString(buf); |
|
if (result == NULL || ! HASTZINFO(self) || self->tzinfo == Py_None) |
|
return result; |
|
|
|
/* We need to append the UTC offset. */ |
|
if (format_utcoffset(buf, sizeof(buf), ":", self->tzinfo, |
|
Py_None) < 0) { |
|
Py_DECREF(result); |
|
return NULL; |
|
} |
|
PyString_ConcatAndDel(&result, PyString_FromString(buf)); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
time_strftime(PyDateTime_Time *self, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *result; |
|
PyObject *format; |
|
PyObject *tuple; |
|
static char *keywords[] = {"format", NULL}; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "O!:strftime", keywords, |
|
&PyString_Type, &format)) |
|
return NULL; |
|
|
|
/* Python's strftime does insane things with the year part of the |
|
* timetuple. The year is forced to (the otherwise nonsensical) |
|
* 1900 to worm around that. |
|
*/ |
|
tuple = Py_BuildValue("iiiiiiiii", |
|
1900, 0, 0, /* year, month, day */ |
|
TIME_GET_HOUR(self), |
|
TIME_GET_MINUTE(self), |
|
TIME_GET_SECOND(self), |
|
0, 0, -1); /* weekday, daynum, dst */ |
|
if (tuple == NULL) |
|
return NULL; |
|
assert(PyTuple_Size(tuple) == 9); |
|
result = wrap_strftime((PyObject *)self, format, tuple, Py_None); |
|
Py_DECREF(tuple); |
|
return result; |
|
} |
|
|
|
/* |
|
* Miscellaneous methods. |
|
*/ |
|
|
|
/* This is more natural as a tp_compare, but doesn't work then: for whatever |
|
* reason, Python's try_3way_compare ignores tp_compare unless |
|
* PyInstance_Check returns true, but these aren't old-style classes. |
|
*/ |
|
static PyObject * |
|
time_richcompare(PyDateTime_Time *self, PyObject *other, int op) |
|
{ |
|
int diff; |
|
naivety n1, n2; |
|
int offset1, offset2; |
|
|
|
if (! PyTime_Check(other)) { |
|
if (op == Py_EQ || op == Py_NE) { |
|
PyObject *result = op == Py_EQ ? Py_False : Py_True; |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
/* Stop this from falling back to address comparison. */ |
|
return cmperror((PyObject *)self, other); |
|
} |
|
if (classify_two_utcoffsets((PyObject *)self, &offset1, &n1, Py_None, |
|
other, &offset2, &n2, Py_None) < 0) |
|
return NULL; |
|
assert(n1 != OFFSET_UNKNOWN && n2 != OFFSET_UNKNOWN); |
|
/* If they're both naive, or both aware and have the same offsets, |
|
* we get off cheap. Note that if they're both naive, offset1 == |
|
* offset2 == 0 at this point. |
|
*/ |
|
if (n1 == n2 && offset1 == offset2) { |
|
diff = memcmp(self->data, ((PyDateTime_Time *)other)->data, |
|
_PyDateTime_TIME_DATASIZE); |
|
return diff_to_bool(diff, op); |
|
} |
|
|
|
if (n1 == OFFSET_AWARE && n2 == OFFSET_AWARE) { |
|
assert(offset1 != offset2); /* else last "if" handled it */ |
|
/* Convert everything except microseconds to seconds. These |
|
* can't overflow (no more than the # of seconds in 2 days). |
|
*/ |
|
offset1 = TIME_GET_HOUR(self) * 3600 + |
|
(TIME_GET_MINUTE(self) - offset1) * 60 + |
|
TIME_GET_SECOND(self); |
|
offset2 = TIME_GET_HOUR(other) * 3600 + |
|
(TIME_GET_MINUTE(other) - offset2) * 60 + |
|
TIME_GET_SECOND(other); |
|
diff = offset1 - offset2; |
|
if (diff == 0) |
|
diff = TIME_GET_MICROSECOND(self) - |
|
TIME_GET_MICROSECOND(other); |
|
return diff_to_bool(diff, op); |
|
} |
|
|
|
assert(n1 != n2); |
|
PyErr_SetString(PyExc_TypeError, |
|
"can't compare offset-naive and " |
|
"offset-aware times"); |
|
return NULL; |
|
} |
|
|
|
static long |
|
time_hash(PyDateTime_Time *self) |
|
{ |
|
if (self->hashcode == -1) { |
|
naivety n; |
|
int offset; |
|
PyObject *temp; |
|
|
|
n = classify_utcoffset((PyObject *)self, Py_None, &offset); |
|
assert(n != OFFSET_UNKNOWN); |
|
if (n == OFFSET_ERROR) |
|
return -1; |
|
|
|
/* Reduce this to a hash of another object. */ |
|
if (offset == 0) |
|
temp = PyString_FromStringAndSize((char *)self->data, |
|
_PyDateTime_TIME_DATASIZE); |
|
else { |
|
int hour; |
|
int minute; |
|
|
|
assert(n == OFFSET_AWARE); |
|
assert(HASTZINFO(self)); |
|
hour = divmod(TIME_GET_HOUR(self) * 60 + |
|
TIME_GET_MINUTE(self) - offset, |
|
60, |
|
&minute); |
|
if (0 <= hour && hour < 24) |
|
temp = new_time(hour, minute, |
|
TIME_GET_SECOND(self), |
|
TIME_GET_MICROSECOND(self), |
|
Py_None); |
|
else |
|
temp = Py_BuildValue("iiii", |
|
hour, minute, |
|
TIME_GET_SECOND(self), |
|
TIME_GET_MICROSECOND(self)); |
|
} |
|
if (temp != NULL) { |
|
self->hashcode = PyObject_Hash(temp); |
|
Py_DECREF(temp); |
|
} |
|
} |
|
return self->hashcode; |
|
} |
|
|
|
static PyObject * |
|
time_replace(PyDateTime_Time *self, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *clone; |
|
PyObject *tuple; |
|
int hh = TIME_GET_HOUR(self); |
|
int mm = TIME_GET_MINUTE(self); |
|
int ss = TIME_GET_SECOND(self); |
|
int us = TIME_GET_MICROSECOND(self); |
|
PyObject *tzinfo = HASTZINFO(self) ? self->tzinfo : Py_None; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "|iiiiO:replace", |
|
time_kws, |
|
&hh, &mm, &ss, &us, &tzinfo)) |
|
return NULL; |
|
tuple = Py_BuildValue("iiiiO", hh, mm, ss, us, tzinfo); |
|
if (tuple == NULL) |
|
return NULL; |
|
clone = time_new(self->ob_type, tuple, NULL); |
|
Py_DECREF(tuple); |
|
return clone; |
|
} |
|
|
|
static int |
|
time_nonzero(PyDateTime_Time *self) |
|
{ |
|
int offset; |
|
int none; |
|
|
|
if (TIME_GET_SECOND(self) || TIME_GET_MICROSECOND(self)) { |
|
/* Since utcoffset is in whole minutes, nothing can |
|
* alter the conclusion that this is nonzero. |
|
*/ |
|
return 1; |
|
} |
|
offset = 0; |
|
if (HASTZINFO(self) && self->tzinfo != Py_None) { |
|
offset = call_utcoffset(self->tzinfo, Py_None, &none); |
|
if (offset == -1 && PyErr_Occurred()) |
|
return -1; |
|
} |
|
return (TIME_GET_MINUTE(self) - offset + TIME_GET_HOUR(self)*60) != 0; |
|
} |
|
|
|
/* Pickle support, a simple use of __reduce__. */ |
|
|
|
/* Let basestate be the non-tzinfo data string. |
|
* If tzinfo is None, this returns (basestate,), else (basestate, tzinfo). |
|
* So it's a tuple in any (non-error) case. |
|
* __getstate__ isn't exposed. |
|
*/ |
|
static PyObject * |
|
time_getstate(PyDateTime_Time *self) |
|
{ |
|
PyObject *basestate; |
|
PyObject *result = NULL; |
|
|
|
basestate = PyString_FromStringAndSize((char *)self->data, |
|
_PyDateTime_TIME_DATASIZE); |
|
if (basestate != NULL) { |
|
if (! HASTZINFO(self) || self->tzinfo == Py_None) |
|
result = Py_BuildValue("(O)", basestate); |
|
else |
|
result = Py_BuildValue("OO", basestate, self->tzinfo); |
|
Py_DECREF(basestate); |
|
} |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
time_reduce(PyDateTime_Time *self, PyObject *arg) |
|
{ |
|
return Py_BuildValue("(ON)", self->ob_type, time_getstate(self)); |
|
} |
|
|
|
static PyMethodDef time_methods[] = { |
|
|
|
{"isoformat", (PyCFunction)time_isoformat, METH_KEYWORDS, |
|
PyDoc_STR("Return string in ISO 8601 format, HH:MM:SS[.mmmmmm]" |
|
"[+HH:MM].")}, |
|
|
|
{"strftime", (PyCFunction)time_strftime, METH_KEYWORDS, |
|
PyDoc_STR("format -> strftime() style string.")}, |
|
|
|
{"utcoffset", (PyCFunction)time_utcoffset, METH_NOARGS, |
|
PyDoc_STR("Return self.tzinfo.utcoffset(self).")}, |
|
|
|
{"tzname", (PyCFunction)time_tzname, METH_NOARGS, |
|
PyDoc_STR("Return self.tzinfo.tzname(self).")}, |
|
|
|
{"dst", (PyCFunction)time_dst, METH_NOARGS, |
|
PyDoc_STR("Return self.tzinfo.dst(self).")}, |
|
|
|
{"replace", (PyCFunction)time_replace, METH_KEYWORDS, |
|
PyDoc_STR("Return time with new specified fields.")}, |
|
|
|
{"__reduce__", (PyCFunction)time_reduce, METH_NOARGS, |
|
PyDoc_STR("__reduce__() -> (cls, state)")}, |
|
|
|
{NULL, NULL} |
|
}; |
|
|
|
static char time_doc[] = |
|
PyDoc_STR("Time type."); |
|
|
|
static PyNumberMethods time_as_number = { |
|
0, /* nb_add */ |
|
0, /* nb_subtract */ |
|
0, /* nb_multiply */ |
|
0, /* nb_divide */ |
|
0, /* nb_remainder */ |
|
0, /* nb_divmod */ |
|
0, /* nb_power */ |
|
0, /* nb_negative */ |
|
0, /* nb_positive */ |
|
0, /* nb_absolute */ |
|
(inquiry)time_nonzero, /* nb_nonzero */ |
|
}; |
|
|
|
statichere PyTypeObject PyDateTime_TimeType = { |
|
PyObject_HEAD_INIT(NULL) |
|
0, /* ob_size */ |
|
"datetime.time", /* tp_name */ |
|
sizeof(PyDateTime_Time), /* tp_basicsize */ |
|
0, /* tp_itemsize */ |
|
(destructor)time_dealloc, /* tp_dealloc */ |
|
0, /* tp_print */ |
|
0, /* tp_getattr */ |
|
0, /* tp_setattr */ |
|
0, /* tp_compare */ |
|
(reprfunc)time_repr, /* tp_repr */ |
|
&time_as_number, /* tp_as_number */ |
|
0, /* tp_as_sequence */ |
|
0, /* tp_as_mapping */ |
|
(hashfunc)time_hash, /* tp_hash */ |
|
0, /* tp_call */ |
|
(reprfunc)time_str, /* tp_str */ |
|
PyObject_GenericGetAttr, /* tp_getattro */ |
|
0, /* tp_setattro */ |
|
0, /* tp_as_buffer */ |
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES | |
|
Py_TPFLAGS_BASETYPE, /* tp_flags */ |
|
time_doc, /* tp_doc */ |
|
0, /* tp_traverse */ |
|
0, /* tp_clear */ |
|
(richcmpfunc)time_richcompare, /* tp_richcompare */ |
|
0, /* tp_weaklistoffset */ |
|
0, /* tp_iter */ |
|
0, /* tp_iternext */ |
|
time_methods, /* tp_methods */ |
|
0, /* tp_members */ |
|
time_getset, /* tp_getset */ |
|
0, /* tp_base */ |
|
0, /* tp_dict */ |
|
0, /* tp_descr_get */ |
|
0, /* tp_descr_set */ |
|
0, /* tp_dictoffset */ |
|
0, /* tp_init */ |
|
time_alloc, /* tp_alloc */ |
|
time_new, /* tp_new */ |
|
0, /* tp_free */ |
|
}; |
|
|
|
/* |
|
* PyDateTime_DateTime implementation. |
|
*/ |
|
|
|
/* Accessor properties. Properties for day, month, and year are inherited |
|
* from date. |
|
*/ |
|
|
|
static PyObject * |
|
datetime_hour(PyDateTime_DateTime *self, void *unused) |
|
{ |
|
return PyInt_FromLong(DATE_GET_HOUR(self)); |
|
} |
|
|
|
static PyObject * |
|
datetime_minute(PyDateTime_DateTime *self, void *unused) |
|
{ |
|
return PyInt_FromLong(DATE_GET_MINUTE(self)); |
|
} |
|
|
|
static PyObject * |
|
datetime_second(PyDateTime_DateTime *self, void *unused) |
|
{ |
|
return PyInt_FromLong(DATE_GET_SECOND(self)); |
|
} |
|
|
|
static PyObject * |
|
datetime_microsecond(PyDateTime_DateTime *self, void *unused) |
|
{ |
|
return PyInt_FromLong(DATE_GET_MICROSECOND(self)); |
|
} |
|
|
|
static PyObject * |
|
datetime_tzinfo(PyDateTime_DateTime *self, void *unused) |
|
{ |
|
PyObject *result = HASTZINFO(self) ? self->tzinfo : Py_None; |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
static PyGetSetDef datetime_getset[] = { |
|
{"hour", (getter)datetime_hour}, |
|
{"minute", (getter)datetime_minute}, |
|
{"second", (getter)datetime_second}, |
|
{"microsecond", (getter)datetime_microsecond}, |
|
{"tzinfo", (getter)datetime_tzinfo}, |
|
{NULL} |
|
}; |
|
|
|
/* |
|
* Constructors. |
|
*/ |
|
|
|
static char *datetime_kws[] = { |
|
"year", "month", "day", "hour", "minute", "second", |
|
"microsecond", "tzinfo", NULL |
|
}; |
|
|
|
static PyObject * |
|
datetime_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *self = NULL; |
|
PyObject *state; |
|
int year; |
|
int month; |
|
int day; |
|
int hour = 0; |
|
int minute = 0; |
|
int second = 0; |
|
int usecond = 0; |
|
PyObject *tzinfo = Py_None; |
|
|
|
/* Check for invocation from pickle with __getstate__ state */ |
|
if (PyTuple_GET_SIZE(args) >= 1 && |
|
PyTuple_GET_SIZE(args) <= 2 && |
|
PyString_Check(state = PyTuple_GET_ITEM(args, 0)) && |
|
PyString_GET_SIZE(state) == _PyDateTime_DATETIME_DATASIZE) |
|
{ |
|
PyDateTime_DateTime *me; |
|
char aware; |
|
|
|
if (PyTuple_GET_SIZE(args) == 2) { |
|
tzinfo = PyTuple_GET_ITEM(args, 1); |
|
if (check_tzinfo_subclass(tzinfo) < 0) { |
|
PyErr_SetString(PyExc_TypeError, "bad " |
|
"tzinfo state arg"); |
|
return NULL; |
|
} |
|
} |
|
aware = (char)(tzinfo != Py_None); |
|
me = (PyDateTime_DateTime *) datetime_alloc( |
|
&PyDateTime_DateTimeType, |
|
aware); |
|
if (me != NULL) { |
|
char *pdata = PyString_AS_STRING(state); |
|
|
|
memcpy(me->data, pdata, _PyDateTime_DATETIME_DATASIZE); |
|
me->hashcode = -1; |
|
me->hastzinfo = aware; |
|
if (aware) { |
|
Py_INCREF(tzinfo); |
|
me->tzinfo = tzinfo; |
|
} |
|
} |
|
return (PyObject *)me; |
|
} |
|
|
|
if (PyArg_ParseTupleAndKeywords(args, kw, "iii|iiiiO", datetime_kws, |
|
&year, &month, &day, &hour, &minute, |
|
&second, &usecond, &tzinfo)) { |
|
if (check_date_args(year, month, day) < 0) |
|
return NULL; |
|
if (check_time_args(hour, minute, second, usecond) < 0) |
|
return NULL; |
|
if (check_tzinfo_subclass(tzinfo) < 0) |
|
return NULL; |
|
self = new_datetime_ex(year, month, day, |
|
hour, minute, second, usecond, |
|
tzinfo, type); |
|
} |
|
return self; |
|
} |
|
|
|
/* TM_FUNC is the shared type of localtime() and gmtime(). */ |
|
typedef struct tm *(*TM_FUNC)(const time_t *timer); |
|
|
|
/* Internal helper. |
|
* Build datetime from a time_t and a distinct count of microseconds. |
|
* Pass localtime or gmtime for f, to control the interpretation of timet. |
|
*/ |
|
static PyObject * |
|
datetime_from_timet_and_us(PyObject *cls, TM_FUNC f, time_t timet, int us, |
|
PyObject *tzinfo) |
|
{ |
|
struct tm *tm; |
|
PyObject *result = NULL; |
|
|
|
tm = f(&timet); |
|
if (tm) { |
|
/* The platform localtime/gmtime may insert leap seconds, |
|
* indicated by tm->tm_sec > 59. We don't care about them, |
|
* except to the extent that passing them on to the datetime |
|
* constructor would raise ValueError for a reason that |
|
* made no sense to the user. |
|
*/ |
|
if (tm->tm_sec > 59) |
|
tm->tm_sec = 59; |
|
result = PyObject_CallFunction(cls, "iiiiiiiO", |
|
tm->tm_year + 1900, |
|
tm->tm_mon + 1, |
|
tm->tm_mday, |
|
tm->tm_hour, |
|
tm->tm_min, |
|
tm->tm_sec, |
|
us, |
|
tzinfo); |
|
} |
|
else |
|
PyErr_SetString(PyExc_ValueError, |
|
"timestamp out of range for " |
|
"platform localtime()/gmtime() function"); |
|
return result; |
|
} |
|
|
|
/* Internal helper. |
|
* Build datetime from a Python timestamp. Pass localtime or gmtime for f, |
|
* to control the interpretation of the timestamp. Since a double doesn't |
|
* have enough bits to cover a datetime's full range of precision, it's |
|
* better to call datetime_from_timet_and_us provided you have a way |
|
* to get that much precision (e.g., C time() isn't good enough). |
|
*/ |
|
static PyObject * |
|
datetime_from_timestamp(PyObject *cls, TM_FUNC f, double timestamp, |
|
PyObject *tzinfo) |
|
{ |
|
time_t timet = (time_t)timestamp; |
|
double fraction = timestamp - (double)timet; |
|
int us = (int)round_to_long(fraction * 1e6); |
|
|
|
return datetime_from_timet_and_us(cls, f, timet, us, tzinfo); |
|
} |
|
|
|
/* Internal helper. |
|
* Build most accurate possible datetime for current time. Pass localtime or |
|
* gmtime for f as appropriate. |
|
*/ |
|
static PyObject * |
|
datetime_best_possible(PyObject *cls, TM_FUNC f, PyObject *tzinfo) |
|
{ |
|
#ifdef HAVE_GETTIMEOFDAY |
|
struct timeval t; |
|
|
|
#ifdef GETTIMEOFDAY_NO_TZ |
|
gettimeofday(&t); |
|
#else |
|
gettimeofday(&t, (struct timezone *)NULL); |
|
#endif |
|
return datetime_from_timet_and_us(cls, f, t.tv_sec, (int)t.tv_usec, |
|
tzinfo); |
|
|
|
#else /* ! HAVE_GETTIMEOFDAY */ |
|
/* No flavor of gettimeofday exists on this platform. Python's |
|
* time.time() does a lot of other platform tricks to get the |
|
* best time it can on the platform, and we're not going to do |
|
* better than that (if we could, the better code would belong |
|
* in time.time()!) We're limited by the precision of a double, |
|
* though. |
|
*/ |
|
PyObject *time; |
|
double dtime; |
|
|
|
time = time_time(); |
|
if (time == NULL) |
|
return NULL; |
|
dtime = PyFloat_AsDouble(time); |
|
Py_DECREF(time); |
|
if (dtime == -1.0 && PyErr_Occurred()) |
|
return NULL; |
|
return datetime_from_timestamp(cls, f, dtime, tzinfo); |
|
#endif /* ! HAVE_GETTIMEOFDAY */ |
|
} |
|
|
|
/* Return best possible local time -- this isn't constrained by the |
|
* precision of a timestamp. |
|
*/ |
|
static PyObject * |
|
datetime_now(PyObject *cls, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *self; |
|
PyObject *tzinfo = Py_None; |
|
static char *keywords[] = {"tz", NULL}; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "|O:now", keywords, |
|
&tzinfo)) |
|
return NULL; |
|
if (check_tzinfo_subclass(tzinfo) < 0) |
|
return NULL; |
|
|
|
self = datetime_best_possible(cls, |
|
tzinfo == Py_None ? localtime : gmtime, |
|
tzinfo); |
|
if (self != NULL && tzinfo != Py_None) { |
|
/* Convert UTC to tzinfo's zone. */ |
|
PyObject *temp = self; |
|
self = PyObject_CallMethod(tzinfo, "fromutc", "O", self); |
|
Py_DECREF(temp); |
|
} |
|
return self; |
|
} |
|
|
|
/* Return best possible UTC time -- this isn't constrained by the |
|
* precision of a timestamp. |
|
*/ |
|
static PyObject * |
|
datetime_utcnow(PyObject *cls, PyObject *dummy) |
|
{ |
|
return datetime_best_possible(cls, gmtime, Py_None); |
|
} |
|
|
|
/* Return new local datetime from timestamp (Python timestamp -- a double). */ |
|
static PyObject * |
|
datetime_fromtimestamp(PyObject *cls, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *self; |
|
double timestamp; |
|
PyObject *tzinfo = Py_None; |
|
static char *keywords[] = {"timestamp", "tz", NULL}; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "d|O:fromtimestamp", |
|
keywords, ×tamp, &tzinfo)) |
|
return NULL; |
|
if (check_tzinfo_subclass(tzinfo) < 0) |
|
return NULL; |
|
|
|
self = datetime_from_timestamp(cls, |
|
tzinfo == Py_None ? localtime : gmtime, |
|
timestamp, |
|
tzinfo); |
|
if (self != NULL && tzinfo != Py_None) { |
|
/* Convert UTC to tzinfo's zone. */ |
|
PyObject *temp = self; |
|
self = PyObject_CallMethod(tzinfo, "fromutc", "O", self); |
|
Py_DECREF(temp); |
|
} |
|
return self; |
|
} |
|
|
|
/* Return new UTC datetime from timestamp (Python timestamp -- a double). */ |
|
static PyObject * |
|
datetime_utcfromtimestamp(PyObject *cls, PyObject *args) |
|
{ |
|
double timestamp; |
|
PyObject *result = NULL; |
|
|
|
if (PyArg_ParseTuple(args, "d:utcfromtimestamp", ×tamp)) |
|
result = datetime_from_timestamp(cls, gmtime, timestamp, |
|
Py_None); |
|
return result; |
|
} |
|
|
|
/* Return new datetime from date/datetime and time arguments. */ |
|
static PyObject * |
|
datetime_combine(PyObject *cls, PyObject *args, PyObject *kw) |
|
{ |
|
static char *keywords[] = {"date", "time", NULL}; |
|
PyObject *date; |
|
PyObject *time; |
|
PyObject *result = NULL; |
|
|
|
if (PyArg_ParseTupleAndKeywords(args, kw, "O!O!:combine", keywords, |
|
&PyDateTime_DateType, &date, |
|
&PyDateTime_TimeType, &time)) { |
|
PyObject *tzinfo = Py_None; |
|
|
|
if (HASTZINFO(time)) |
|
tzinfo = ((PyDateTime_Time *)time)->tzinfo; |
|
result = PyObject_CallFunction(cls, "iiiiiiiO", |
|
GET_YEAR(date), |
|
GET_MONTH(date), |
|
GET_DAY(date), |
|
TIME_GET_HOUR(time), |
|
TIME_GET_MINUTE(time), |
|
TIME_GET_SECOND(time), |
|
TIME_GET_MICROSECOND(time), |
|
tzinfo); |
|
} |
|
return result; |
|
} |
|
|
|
/* |
|
* Destructor. |
|
*/ |
|
|
|
static void |
|
datetime_dealloc(PyDateTime_DateTime *self) |
|
{ |
|
if (HASTZINFO(self)) { |
|
Py_XDECREF(self->tzinfo); |
|
} |
|
self->ob_type->tp_free((PyObject *)self); |
|
} |
|
|
|
/* |
|
* Indirect access to tzinfo methods. |
|
*/ |
|
|
|
/* These are all METH_NOARGS, so don't need to check the arglist. */ |
|
static PyObject * |
|
datetime_utcoffset(PyDateTime_DateTime *self, PyObject *unused) { |
|
return offset_as_timedelta(HASTZINFO(self) ? self->tzinfo : Py_None, |
|
"utcoffset", (PyObject *)self); |
|
} |
|
|
|
static PyObject * |
|
datetime_dst(PyDateTime_DateTime *self, PyObject *unused) { |
|
return offset_as_timedelta(HASTZINFO(self) ? self->tzinfo : Py_None, |
|
"dst", (PyObject *)self); |
|
} |
|
|
|
static PyObject * |
|
datetime_tzname(PyDateTime_DateTime *self, PyObject *unused) { |
|
return call_tzname(HASTZINFO(self) ? self->tzinfo : Py_None, |
|
(PyObject *)self); |
|
} |
|
|
|
/* |
|
* datetime arithmetic. |
|
*/ |
|
|
|
/* factor must be 1 (to add) or -1 (to subtract). The result inherits |
|
* the tzinfo state of date. |
|
*/ |
|
static PyObject * |
|
add_datetime_timedelta(PyDateTime_DateTime *date, PyDateTime_Delta *delta, |
|
int factor) |
|
{ |
|
/* Note that the C-level additions can't overflow, because of |
|
* invariant bounds on the member values. |
|
*/ |
|
int year = GET_YEAR(date); |
|
int month = GET_MONTH(date); |
|
int day = GET_DAY(date) + GET_TD_DAYS(delta) * factor; |
|
int hour = DATE_GET_HOUR(date); |
|
int minute = DATE_GET_MINUTE(date); |
|
int second = DATE_GET_SECOND(date) + GET_TD_SECONDS(delta) * factor; |
|
int microsecond = DATE_GET_MICROSECOND(date) + |
|
GET_TD_MICROSECONDS(delta) * factor; |
|
|
|
assert(factor == 1 || factor == -1); |
|
if (normalize_datetime(&year, &month, &day, |
|
&hour, &minute, &second, µsecond) < 0) |
|
return NULL; |
|
else |
|
return new_datetime(year, month, day, |
|
hour, minute, second, microsecond, |
|
HASTZINFO(date) ? date->tzinfo : Py_None); |
|
} |
|
|
|
static PyObject * |
|
datetime_add(PyObject *left, PyObject *right) |
|
{ |
|
if (PyDateTime_Check(left)) { |
|
/* datetime + ??? */ |
|
if (PyDelta_Check(right)) |
|
/* datetime + delta */ |
|
return add_datetime_timedelta( |
|
(PyDateTime_DateTime *)left, |
|
(PyDateTime_Delta *)right, |
|
1); |
|
} |
|
else if (PyDelta_Check(left)) { |
|
/* delta + datetime */ |
|
return add_datetime_timedelta((PyDateTime_DateTime *) right, |
|
(PyDateTime_Delta *) left, |
|
1); |
|
} |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
|
|
static PyObject * |
|
datetime_subtract(PyObject *left, PyObject *right) |
|
{ |
|
PyObject *result = Py_NotImplemented; |
|
|
|
if (PyDateTime_Check(left)) { |
|
/* datetime - ??? */ |
|
if (PyDateTime_Check(right)) { |
|
/* datetime - datetime */ |
|
naivety n1, n2; |
|
int offset1, offset2; |
|
int delta_d, delta_s, delta_us; |
|
|
|
if (classify_two_utcoffsets(left, &offset1, &n1, left, |
|
right, &offset2, &n2, |
|
right) < 0) |
|
return NULL; |
|
assert(n1 != OFFSET_UNKNOWN && n2 != OFFSET_UNKNOWN); |
|
if (n1 != n2) { |
|
PyErr_SetString(PyExc_TypeError, |
|
"can't subtract offset-naive and " |
|
"offset-aware datetimes"); |
|
return NULL; |
|
} |
|
delta_d = ymd_to_ord(GET_YEAR(left), |
|
GET_MONTH(left), |
|
GET_DAY(left)) - |
|
ymd_to_ord(GET_YEAR(right), |
|
GET_MONTH(right), |
|
GET_DAY(right)); |
|
/* These can't overflow, since the values are |
|
* normalized. At most this gives the number of |
|
* seconds in one day. |
|
*/ |
|
delta_s = (DATE_GET_HOUR(left) - |
|
DATE_GET_HOUR(right)) * 3600 + |
|
(DATE_GET_MINUTE(left) - |
|
DATE_GET_MINUTE(right)) * 60 + |
|
(DATE_GET_SECOND(left) - |
|
DATE_GET_SECOND(right)); |
|
delta_us = DATE_GET_MICROSECOND(left) - |
|
DATE_GET_MICROSECOND(right); |
|
/* (left - offset1) - (right - offset2) = |
|
* (left - right) + (offset2 - offset1) |
|
*/ |
|
delta_s += (offset2 - offset1) * 60; |
|
result = new_delta(delta_d, delta_s, delta_us, 1); |
|
} |
|
else if (PyDelta_Check(right)) { |
|
/* datetime - delta */ |
|
result = add_datetime_timedelta( |
|
(PyDateTime_DateTime *)left, |
|
(PyDateTime_Delta *)right, |
|
-1); |
|
} |
|
} |
|
|
|
if (result == Py_NotImplemented) |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
|
|
/* Various ways to turn a datetime into a string. */ |
|
|
|
static PyObject * |
|
datetime_repr(PyDateTime_DateTime *self) |
|
{ |
|
char buffer[1000]; |
|
char *typename = self->ob_type->tp_name; |
|
PyObject *baserepr; |
|
|
|
if (DATE_GET_MICROSECOND(self)) { |
|
PyOS_snprintf(buffer, sizeof(buffer), |
|
"%s(%d, %d, %d, %d, %d, %d, %d)", |
|
typename, |
|
GET_YEAR(self), GET_MONTH(self), GET_DAY(self), |
|
DATE_GET_HOUR(self), DATE_GET_MINUTE(self), |
|
DATE_GET_SECOND(self), |
|
DATE_GET_MICROSECOND(self)); |
|
} |
|
else if (DATE_GET_SECOND(self)) { |
|
PyOS_snprintf(buffer, sizeof(buffer), |
|
"%s(%d, %d, %d, %d, %d, %d)", |
|
typename, |
|
GET_YEAR(self), GET_MONTH(self), GET_DAY(self), |
|
DATE_GET_HOUR(self), DATE_GET_MINUTE(self), |
|
DATE_GET_SECOND(self)); |
|
} |
|
else { |
|
PyOS_snprintf(buffer, sizeof(buffer), |
|
"%s(%d, %d, %d, %d, %d)", |
|
typename, |
|
GET_YEAR(self), GET_MONTH(self), GET_DAY(self), |
|
DATE_GET_HOUR(self), DATE_GET_MINUTE(self)); |
|
} |
|
baserepr = PyString_FromString(buffer); |
|
if (baserepr == NULL || ! HASTZINFO(self)) |
|
return baserepr; |
|
return append_keyword_tzinfo(baserepr, self->tzinfo); |
|
} |
|
|
|
static PyObject * |
|
datetime_str(PyDateTime_DateTime *self) |
|
{ |
|
return PyObject_CallMethod((PyObject *)self, "isoformat", "(s)", " "); |
|
} |
|
|
|
static PyObject * |
|
datetime_isoformat(PyDateTime_DateTime *self, PyObject *args, PyObject *kw) |
|
{ |
|
char sep = 'T'; |
|
static char *keywords[] = {"sep", NULL}; |
|
char buffer[100]; |
|
char *cp; |
|
PyObject *result; |
|
|
|
if (!PyArg_ParseTupleAndKeywords(args, kw, "|c:isoformat", keywords, |
|
&sep)) |
|
return NULL; |
|
cp = isoformat_date((PyDateTime_Date *)self, buffer, sizeof(buffer)); |
|
assert(cp != NULL); |
|
*cp++ = sep; |
|
isoformat_time(self, cp, sizeof(buffer) - (cp - buffer)); |
|
result = PyString_FromString(buffer); |
|
if (result == NULL || ! HASTZINFO(self)) |
|
return result; |
|
|
|
/* We need to append the UTC offset. */ |
|
if (format_utcoffset(buffer, sizeof(buffer), ":", self->tzinfo, |
|
(PyObject *)self) < 0) { |
|
Py_DECREF(result); |
|
return NULL; |
|
} |
|
PyString_ConcatAndDel(&result, PyString_FromString(buffer)); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
datetime_ctime(PyDateTime_DateTime *self) |
|
{ |
|
return format_ctime((PyDateTime_Date *)self, |
|
DATE_GET_HOUR(self), |
|
DATE_GET_MINUTE(self), |
|
DATE_GET_SECOND(self)); |
|
} |
|
|
|
/* Miscellaneous methods. */ |
|
|
|
/* This is more natural as a tp_compare, but doesn't work then: for whatever |
|
* reason, Python's try_3way_compare ignores tp_compare unless |
|
* PyInstance_Check returns true, but these aren't old-style classes. |
|
*/ |
|
static PyObject * |
|
datetime_richcompare(PyDateTime_DateTime *self, PyObject *other, int op) |
|
{ |
|
int diff; |
|
naivety n1, n2; |
|
int offset1, offset2; |
|
|
|
if (! PyDateTime_Check(other)) { |
|
if (PyObject_HasAttrString(other, "timetuple")) { |
|
/* A hook for other kinds of datetime objects. */ |
|
Py_INCREF(Py_NotImplemented); |
|
return Py_NotImplemented; |
|
} |
|
if (op == Py_EQ || op == Py_NE) { |
|
PyObject *result = op == Py_EQ ? Py_False : Py_True; |
|
Py_INCREF(result); |
|
return result; |
|
} |
|
/* Stop this from falling back to address comparison. */ |
|
return cmperror((PyObject *)self, other); |
|
} |
|
|
|
if (classify_two_utcoffsets((PyObject *)self, &offset1, &n1, |
|
(PyObject *)self, |
|
other, &offset2, &n2, |
|
other) < 0) |
|
return NULL; |
|
assert(n1 != OFFSET_UNKNOWN && n2 != OFFSET_UNKNOWN); |
|
/* If they're both naive, or both aware and have the same offsets, |
|
* we get off cheap. Note that if they're both naive, offset1 == |
|
* offset2 == 0 at this point. |
|
*/ |
|
if (n1 == n2 && offset1 == offset2) { |
|
diff = memcmp(self->data, ((PyDateTime_DateTime *)other)->data, |
|
_PyDateTime_DATETIME_DATASIZE); |
|
return diff_to_bool(diff, op); |
|
} |
|
|
|
if (n1 == OFFSET_AWARE && n2 == OFFSET_AWARE) { |
|
PyDateTime_Delta *delta; |
|
|
|
assert(offset1 != offset2); /* else last "if" handled it */ |
|
delta = (PyDateTime_Delta *)datetime_subtract((PyObject *)self, |
|
other); |
|
if (delta == NULL) |
|
return NULL; |
|
diff = GET_TD_DAYS(delta); |
|
if (diff == 0) |
|
diff = GET_TD_SECONDS(delta) | |
|
GET_TD_MICROSECONDS(delta); |
|
Py_DECREF(delta); |
|
return diff_to_bool(diff, op); |
|
} |
|
|
|
assert(n1 != n2); |
|
PyErr_SetString(PyExc_TypeError, |
|
"can't compare offset-naive and " |
|
"offset-aware datetimes"); |
|
return NULL; |
|
} |
|
|
|
static long |
|
datetime_hash(PyDateTime_DateTime *self) |
|
{ |
|
if (self->hashcode == -1) { |
|
naivety n; |
|
int offset; |
|
PyObject *temp; |
|
|
|
n = classify_utcoffset((PyObject *)self, (PyObject *)self, |
|
&offset); |
|
assert(n != OFFSET_UNKNOWN); |
|
if (n == OFFSET_ERROR) |
|
return -1; |
|
|
|
/* Reduce this to a hash of another object. */ |
|
if (n == OFFSET_NAIVE) |
|
temp = PyString_FromStringAndSize( |
|
(char *)self->data, |
|
_PyDateTime_DATETIME_DATASIZE); |
|
else { |
|
int days; |
|
int seconds; |
|
|
|
assert(n == OFFSET_AWARE); |
|
assert(HASTZINFO(self)); |
|
days = ymd_to_ord(GET_YEAR(self), |
|
GET_MONTH(self), |
|
GET_DAY(self)); |
|
seconds = DATE_GET_HOUR(self) * 3600 + |
|
(DATE_GET_MINUTE(self) - offset) * 60 + |
|
DATE_GET_SECOND(self); |
|
temp = new_delta(days, |
|
seconds, |
|
DATE_GET_MICROSECOND(self), |
|
1); |
|
} |
|
if (temp != NULL) { |
|
self->hashcode = PyObject_Hash(temp); |
|
Py_DECREF(temp); |
|
} |
|
} |
|
return self->hashcode; |
|
} |
|
|
|
static PyObject * |
|
datetime_replace(PyDateTime_DateTime *self, PyObject *args, PyObject *kw) |
|
{ |
|
PyObject *clone; |
|
PyObject *tuple; |
|
int y = GET_YEAR(self); |
|
int m = GET_MONTH(self); |
|
int d = GET_DAY(self); |
|
int hh = DATE_GET_HOUR(self); |
|
int mm = DATE_GET_MINUTE(self); |
|
int ss = DATE_GET_SECOND(self); |
|
int us = DATE_GET_MICROSECOND(self); |
|
PyObject *tzinfo = HASTZINFO(self) ? self->tzinfo : Py_None; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "|iiiiiiiO:replace", |
|
datetime_kws, |
|
&y, &m, &d, &hh, &mm, &ss, &us, |
|
&tzinfo)) |
|
return NULL; |
|
tuple = Py_BuildValue("iiiiiiiO", y, m, d, hh, mm, ss, us, tzinfo); |
|
if (tuple == NULL) |
|
return NULL; |
|
clone = datetime_new(self->ob_type, tuple, NULL); |
|
Py_DECREF(tuple); |
|
return clone; |
|
} |
|
|
|
static PyObject * |
|
datetime_astimezone(PyDateTime_DateTime *self, PyObject *args, PyObject *kw) |
|
{ |
|
int y, m, d, hh, mm, ss, us; |
|
PyObject *result; |
|
int offset, none; |
|
|
|
PyObject *tzinfo; |
|
static char *keywords[] = {"tz", NULL}; |
|
|
|
if (! PyArg_ParseTupleAndKeywords(args, kw, "O!:astimezone", keywords, |
|
&PyDateTime_TZInfoType, &tzinfo)) |
|
return NULL; |
|
|
|
if (!HASTZINFO(self) || self->tzinfo == Py_None) |
|
goto NeedAware; |
|
|
|
/* Conversion to self's own time zone is a NOP. */ |
|
if (self->tzinfo == tzinfo) { |
|
Py_INCREF(self); |
|
return (PyObject *)self; |
|
} |
|
|
|
/* Convert self to UTC. */ |
|
offset = call_utcoffset(self->tzinfo, (PyObject *)self, &none); |
|
if (offset == -1 && PyErr_Occurred()) |
|
return NULL; |
|
if (none) |
|
goto NeedAware; |
|
|
|
y = GET_YEAR(self); |
|
m = GET_MONTH(self); |
|
d = GET_DAY(self); |
|
hh = DATE_GET_HOUR(self); |
|
mm = DATE_GET_MINUTE(self); |
|
ss = DATE_GET_SECOND(self); |
|
us = DATE_GET_MICROSECOND(self); |
|
|
|
mm -= offset; |
|
if ((mm < 0 || mm >= 60) && |
|
normalize_datetime(&y, &m, &d, &hh, &mm, &ss, &us) < 0) |
|
return NULL; |
|
|
|
/* Attach new tzinfo and let fromutc() do the rest. */ |
|
result = new_datetime(y, m, d, hh, mm, ss, us, tzinfo); |
|
if (result != NULL) { |
|
PyObject *temp = result; |
|
|
|
result = PyObject_CallMethod(tzinfo, "fromutc", "O", temp); |
|
Py_DECREF(temp); |
|
} |
|
return result; |
|
|
|
NeedAware: |
|
PyErr_SetString(PyExc_ValueError, "astimezone() cannot be applied to " |
|
"a naive datetime"); |
|
return NULL; |
|
} |
|
|
|
static PyObject * |
|
datetime_timetuple(PyDateTime_DateTime *self) |
|
{ |
|
int dstflag = -1; |
|
|
|
if (HASTZINFO(self) && self->tzinfo != Py_None) { |
|
int none; |
|
|
|
dstflag = call_dst(self->tzinfo, (PyObject *)self, &none); |
|
if (dstflag == -1 && PyErr_Occurred()) |
|
return NULL; |
|
|
|
if (none) |
|
dstflag = -1; |
|
else if (dstflag != 0) |
|
dstflag = 1; |
|
|
|
} |
|
return build_struct_time(GET_YEAR(self), |
|
GET_MONTH(self), |
|
GET_DAY(self), |
|
DATE_GET_HOUR(self), |
|
DATE_GET_MINUTE(self), |
|
DATE_GET_SECOND(self), |
|
dstflag); |
|
} |
|
|
|
static PyObject * |
|
datetime_getdate(PyDateTime_DateTime *self) |
|
{ |
|
return new_date(GET_YEAR(self), |
|
GET_MONTH(self), |
|
GET_DAY(self)); |
|
} |
|
|
|
static PyObject * |
|
datetime_gettime(PyDateTime_DateTime *self) |
|
{ |
|
return new_time(DATE_GET_HOUR(self), |
|
DATE_GET_MINUTE(self), |
|
DATE_GET_SECOND(self), |
|
DATE_GET_MICROSECOND(self), |
|
Py_None); |
|
} |
|
|
|
static PyObject * |
|
datetime_gettimetz(PyDateTime_DateTime *self) |
|
{ |
|
return new_time(DATE_GET_HOUR(self), |
|
DATE_GET_MINUTE(self), |
|
DATE_GET_SECOND(self), |
|
DATE_GET_MICROSECOND(self), |
|
HASTZINFO(self) ? self->tzinfo : Py_None); |
|
} |
|
|
|
static PyObject * |
|
datetime_utctimetuple(PyDateTime_DateTime *self) |
|
{ |
|
int y = GET_YEAR(self); |
|
int m = GET_MONTH(self); |
|
int d = GET_DAY(self); |
|
int hh = DATE_GET_HOUR(self); |
|
int mm = DATE_GET_MINUTE(self); |
|
int ss = DATE_GET_SECOND(self); |
|
int us = 0; /* microseconds are ignored in a timetuple */ |
|
int offset = 0; |
|
|
|
if (HASTZINFO(self) && self->tzinfo != Py_None) { |
|
int none; |
|
|
|
offset = call_utcoffset(self->tzinfo, (PyObject *)self, &none); |
|
if (offset == -1 && PyErr_Occurred()) |
|
return NULL; |
|
} |
|
/* Even if offset is 0, don't call timetuple() -- tm_isdst should be |
|
* 0 in a UTC timetuple regardless of what dst() says. |
|
*/ |
|
if (offset) { |
|
/* Subtract offset minutes & normalize. */ |
|
int stat; |
|
|
|
mm -= offset; |
|
stat = normalize_datetime(&y, &m, &d, &hh, &mm, &ss, &us); |
|
if (stat < 0) { |
|
/* At the edges, it's possible we overflowed |
|
* beyond MINYEAR or MAXYEAR. |
|
*/ |
|
if (PyErr_ExceptionMatches(PyExc_OverflowError)) |
|
PyErr_Clear(); |
|
else |
|
return NULL; |
|
} |
|
} |
|
return build_struct_time(y, m, d, hh, mm, ss, 0); |
|
} |
|
|
|
/* Pickle support, a simple use of __reduce__. */ |
|
|
|
/* Let basestate be the non-tzinfo data string. |
|
* If tzinfo is None, this returns (basestate,), else (basestate, tzinfo). |
|
* So it's a tuple in any (non-error) case. |
|
* __getstate__ isn't exposed. |
|
*/ |
|
static PyObject * |
|
datetime_getstate(PyDateTime_DateTime *self) |
|
{ |
|
PyObject *basestate; |
|
PyObject *result = NULL; |
|
|
|
basestate = PyString_FromStringAndSize((char *)self->data, |
|
_PyDateTime_DATETIME_DATASIZE); |
|
if (basestate != NULL) { |
|
if (! HASTZINFO(self) || self->tzinfo == Py_None) |
|
result = Py_BuildValue("(O)", basestate); |
|
else |
|
result = Py_BuildValue("OO", basestate, self->tzinfo); |
|
Py_DECREF(basestate); |
|
} |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
datetime_reduce(PyDateTime_DateTime *self, PyObject *arg) |
|
{ |
|
return Py_BuildValue("(ON)", self->ob_type, datetime_getstate(self)); |
|
} |
|
|
|
static PyMethodDef datetime_methods[] = { |
|
|
|
/* Class methods: */ |
|
|
|
{"now", (PyCFunction)datetime_now, |
|
METH_KEYWORDS | METH_CLASS, |
|
PyDoc_STR("[tz] -> new datetime with tz's local day and time.")}, |
|
|
|
{"utcnow", (PyCFunction)datetime_utcnow, |
|
METH_NOARGS | METH_CLASS, |
|
PyDoc_STR("Return a new datetime representing UTC day and time.")}, |
|
|
|
{"fromtimestamp", (PyCFunction)datetime_fromtimestamp, |
|
METH_KEYWORDS | METH_CLASS, |
|
PyDoc_STR("timestamp[, tz] -> tz's local time from POSIX timestamp.")}, |
|
|
|
{"utcfromtimestamp", (PyCFunction)datetime_utcfromtimestamp, |
|
METH_VARARGS | METH_CLASS, |
|
PyDoc_STR("timestamp -> UTC datetime from a POSIX timestamp " |
|
"(like time.time()).")}, |
|
|
|
{"combine", (PyCFunction)datetime_combine, |
|
METH_VARARGS | METH_KEYWORDS | METH_CLASS, |
|
PyDoc_STR("date, time -> datetime with same date and time fields")}, |
|
|
|
/* Instance methods: */ |
|
|
|
{"date", (PyCFunction)datetime_getdate, METH_NOARGS, |
|
PyDoc_STR("Return date object with same year, month and day.")}, |
|
|
|
{"time", (PyCFunction)datetime_gettime, METH_NOARGS, |
|
PyDoc_STR("Return time object with same time but with tzinfo=None.")}, |
|
|
|
{"timetz", (PyCFunction)datetime_gettimetz, METH_NOARGS, |
|
PyDoc_STR("Return time object with same time and tzinfo.")}, |
|
|
|
{"ctime", (PyCFunction)datetime_ctime, METH_NOARGS, |
|
PyDoc_STR("Return ctime() style string.")}, |
|
|
|
{"timetuple", (PyCFunction)datetime_timetuple, METH_NOARGS, |
|
PyDoc_STR("Return time tuple, compatible with time.localtime().")}, |
|
|
|
{"utctimetuple", (PyCFunction)datetime_utctimetuple, METH_NOARGS, |
|
PyDoc_STR("Return UTC time tuple, compatible with time.localtime().")}, |
|
|
|
{"isoformat", (PyCFunction)datetime_isoformat, METH_KEYWORDS, |
|
PyDoc_STR("[sep] -> string in ISO 8601 format, " |
|
"YYYY-MM-DDTHH:MM:SS[.mmmmmm][+HH:MM].\n\n" |
|
"sep is used to separate the year from the time, and " |
|
"defaults to 'T'.")}, |
|
|
|
{"utcoffset", (PyCFunction)datetime_utcoffset, METH_NOARGS, |
|
PyDoc_STR("Return self.tzinfo.utcoffset(self).")}, |
|
|
|
{"tzname", (PyCFunction)datetime_tzname, METH_NOARGS, |
|
PyDoc_STR("Return self.tzinfo.tzname(self).")}, |
|
|
|
{"dst", (PyCFunction)datetime_dst, METH_NOARGS, |
|
PyDoc_STR("Return self.tzinfo.dst(self).")}, |
|
|
|
{"replace", (PyCFunction)datetime_replace, METH_KEYWORDS, |
|
PyDoc_STR("Return datetime with new specified fields.")}, |
|
|
|
{"astimezone", (PyCFunction)datetime_astimezone, METH_KEYWORDS, |
|
PyDoc_STR("tz -> convert to local time in new timezone tz\n")}, |
|
|
|
{"__reduce__", (PyCFunction)datetime_reduce, METH_NOARGS, |
|
PyDoc_STR("__reduce__() -> (cls, state)")}, |
|
|
|
{NULL, NULL} |
|
}; |
|
|
|
static char datetime_doc[] = |
|
PyDoc_STR("date/time type."); |
|
|
|
static PyNumberMethods datetime_as_number = { |
|
datetime_add, /* nb_add */ |
|
datetime_subtract, /* nb_subtract */ |
|
0, /* nb_multiply */ |
|
0, /* nb_divide */ |
|
0, /* nb_remainder */ |
|
0, /* nb_divmod */ |
|
0, /* nb_power */ |
|
0, /* nb_negative */ |
|
0, /* nb_positive */ |
|
0, /* nb_absolute */ |
|
0, /* nb_nonzero */ |
|
}; |
|
|
|
statichere PyTypeObject PyDateTime_DateTimeType = { |
|
PyObject_HEAD_INIT(NULL) |
|
0, /* ob_size */ |
|
"datetime.datetime", /* tp_name */ |
|
sizeof(PyDateTime_DateTime), /* tp_basicsize */ |
|
0, /* tp_itemsize */ |
|
(destructor)datetime_dealloc, /* tp_dealloc */ |
|
0, /* tp_print */ |
|
0, /* tp_getattr */ |
|
0, /* tp_setattr */ |
|
0, /* tp_compare */ |
|
(reprfunc)datetime_repr, /* tp_repr */ |
|
&datetime_as_number, /* tp_as_number */ |
|
0, /* tp_as_sequence */ |
|
0, /* tp_as_mapping */ |
|
(hashfunc)datetime_hash, /* tp_hash */ |
|
0, /* tp_call */ |
|
(reprfunc)datetime_str, /* tp_str */ |
|
PyObject_GenericGetAttr, /* tp_getattro */ |
|
0, /* tp_setattro */ |
|
0, /* tp_as_buffer */ |
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES | |
|
Py_TPFLAGS_BASETYPE, /* tp_flags */ |
|
datetime_doc, /* tp_doc */ |
|
0, /* tp_traverse */ |
|
0, /* tp_clear */ |
|
(richcmpfunc)datetime_richcompare, /* tp_richcompare */ |
|
0, /* tp_weaklistoffset */ |
|
0, /* tp_iter */ |
|
0, /* tp_iternext */ |
|
datetime_methods, /* tp_methods */ |
|
0, /* tp_members */ |
|
datetime_getset, /* tp_getset */ |
|
&PyDateTime_DateType, /* tp_base */ |
|
0, /* tp_dict */ |
|
0, /* tp_descr_get */ |
|
0, /* tp_descr_set */ |
|
0, /* tp_dictoffset */ |
|
0, /* tp_init */ |
|
datetime_alloc, /* tp_alloc */ |
|
datetime_new, /* tp_new */ |
|
0, /* tp_free */ |
|
}; |
|
|
|
/* --------------------------------------------------------------------------- |
|
* Module methods and initialization. |
|
*/ |
|
|
|
static PyMethodDef module_methods[] = { |
|
{NULL, NULL} |
|
}; |
|
|
|
PyMODINIT_FUNC |
|
initdatetime(void) |
|
{ |
|
PyObject *m; /* a module object */ |
|
PyObject *d; /* its dict */ |
|
PyObject *x; |
|
|
|
m = Py_InitModule3("datetime", module_methods, |
|
"Fast implementation of the datetime type."); |
|
|
|
if (PyType_Ready(&PyDateTime_DateType) < 0) |
|
return; |
|
if (PyType_Ready(&PyDateTime_DateTimeType) < 0) |
|
return; |
|
if (PyType_Ready(&PyDateTime_DeltaType) < 0) |
|
return; |
|
if (PyType_Ready(&PyDateTime_TimeType) < 0) |
|
return; |
|
if (PyType_Ready(&PyDateTime_TZInfoType) < 0) |
|
return; |
|
|
|
/* timedelta values */ |
|
d = PyDateTime_DeltaType.tp_dict; |
|
|
|
x = new_delta(0, 0, 1, 0); |
|
if (x == NULL || PyDict_SetItemString(d, "resolution", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_delta(-MAX_DELTA_DAYS, 0, 0, 0); |
|
if (x == NULL || PyDict_SetItemString(d, "min", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_delta(MAX_DELTA_DAYS, 24*3600-1, 1000000-1, 0); |
|
if (x == NULL || PyDict_SetItemString(d, "max", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
/* date values */ |
|
d = PyDateTime_DateType.tp_dict; |
|
|
|
x = new_date(1, 1, 1); |
|
if (x == NULL || PyDict_SetItemString(d, "min", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_date(MAXYEAR, 12, 31); |
|
if (x == NULL || PyDict_SetItemString(d, "max", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_delta(1, 0, 0, 0); |
|
if (x == NULL || PyDict_SetItemString(d, "resolution", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
/* time values */ |
|
d = PyDateTime_TimeType.tp_dict; |
|
|
|
x = new_time(0, 0, 0, 0, Py_None); |
|
if (x == NULL || PyDict_SetItemString(d, "min", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_time(23, 59, 59, 999999, Py_None); |
|
if (x == NULL || PyDict_SetItemString(d, "max", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_delta(0, 0, 1, 0); |
|
if (x == NULL || PyDict_SetItemString(d, "resolution", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
/* datetime values */ |
|
d = PyDateTime_DateTimeType.tp_dict; |
|
|
|
x = new_datetime(1, 1, 1, 0, 0, 0, 0, Py_None); |
|
if (x == NULL || PyDict_SetItemString(d, "min", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_datetime(MAXYEAR, 12, 31, 23, 59, 59, 999999, Py_None); |
|
if (x == NULL || PyDict_SetItemString(d, "max", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
x = new_delta(0, 0, 1, 0); |
|
if (x == NULL || PyDict_SetItemString(d, "resolution", x) < 0) |
|
return; |
|
Py_DECREF(x); |
|
|
|
/* module initialization */ |
|
PyModule_AddIntConstant(m, "MINYEAR", MINYEAR); |
|
PyModule_AddIntConstant(m, "MAXYEAR", MAXYEAR); |
|
|
|
Py_INCREF(&PyDateTime_DateType); |
|
PyModule_AddObject(m, "date", (PyObject *) &PyDateTime_DateType); |
|
|
|
Py_INCREF(&PyDateTime_DateTimeType); |
|
PyModule_AddObject(m, "datetime", |
|
(PyObject *)&PyDateTime_DateTimeType); |
|
|
|
Py_INCREF(&PyDateTime_TimeType); |
|
PyModule_AddObject(m, "time", (PyObject *) &PyDateTime_TimeType); |
|
|
|
Py_INCREF(&PyDateTime_DeltaType); |
|
PyModule_AddObject(m, "timedelta", (PyObject *) &PyDateTime_DeltaType); |
|
|
|
Py_INCREF(&PyDateTime_TZInfoType); |
|
PyModule_AddObject(m, "tzinfo", (PyObject *) &PyDateTime_TZInfoType); |
|
|
|
/* A 4-year cycle has an extra leap day over what we'd get from |
|
* pasting together 4 single years. |
|
*/ |
|
assert(DI4Y == 4 * 365 + 1); |
|
assert(DI4Y == days_before_year(4+1)); |
|
|
|
/* Similarly, a 400-year cycle has an extra leap day over what we'd |
|
* get from pasting together 4 100-year cycles. |
|
*/ |
|
assert(DI400Y == 4 * DI100Y + 1); |
|
assert(DI400Y == days_before_year(400+1)); |
|
|
|
/* OTOH, a 100-year cycle has one fewer leap day than we'd get from |
|
* pasting together 25 4-year cycles. |
|
*/ |
|
assert(DI100Y == 25 * DI4Y - 1); |
|
assert(DI100Y == days_before_year(100+1)); |
|
|
|
us_per_us = PyInt_FromLong(1); |
|
us_per_ms = PyInt_FromLong(1000); |
|
us_per_second = PyInt_FromLong(1000000); |
|
us_per_minute = PyInt_FromLong(60000000); |
|
seconds_per_day = PyInt_FromLong(24 * 3600); |
|
if (us_per_us == NULL || us_per_ms == NULL || us_per_second == NULL || |
|
us_per_minute == NULL || seconds_per_day == NULL) |
|
return; |
|
|
|
/* The rest are too big for 32-bit ints, but even |
|
* us_per_week fits in 40 bits, so doubles should be exact. |
|
*/ |
|
us_per_hour = PyLong_FromDouble(3600000000.0); |
|
us_per_day = PyLong_FromDouble(86400000000.0); |
|
us_per_week = PyLong_FromDouble(604800000000.0); |
|
if (us_per_hour == NULL || us_per_day == NULL || us_per_week == NULL) |
|
return; |
|
} |
|
|
|
/* --------------------------------------------------------------------------- |
|
Some time zone algebra. For a datetime x, let |
|
x.n = x stripped of its timezone -- its naive time. |
|
x.o = x.utcoffset(), and assuming that doesn't raise an exception or |
|
return None |
|
x.d = x.dst(), and assuming that doesn't raise an exception or |
|
return None |
|
x.s = x's standard offset, x.o - x.d |
|
|
|
Now some derived rules, where k is a duration (timedelta). |
|
|
|
1. x.o = x.s + x.d |
|
This follows from the definition of x.s. |
|
|
|
2. If x and y have the same tzinfo member, x.s = y.s. |
|
This is actually a requirement, an assumption we need to make about |
|
sane tzinfo classes. |
|
|
|
3. The naive UTC time corresponding to x is x.n - x.o. |
|
This is again a requirement for a sane tzinfo class. |
|
|
|
4. (x+k).s = x.s |
|
This follows from #2, and that datimetimetz+timedelta preserves tzinfo. |
|
|
|
5. (x+k).n = x.n + k |
|
Again follows from how arithmetic is defined. |
|
|
|
Now we can explain tz.fromutc(x). Let's assume it's an interesting case |
|
(meaning that the various tzinfo methods exist, and don't blow up or return |
|
None when called). |
|
|
|
The function wants to return a datetime y with timezone tz, equivalent to x. |
|
x is already in UTC. |
|
|
|
By #3, we want |
|
|
|
y.n - y.o = x.n [1] |
|
|
|
The algorithm starts by attaching tz to x.n, and calling that y. So |
|
x.n = y.n at the start. Then it wants to add a duration k to y, so that [1] |
|
becomes true; in effect, we want to solve [2] for k: |
|
|
|
(y+k).n - (y+k).o = x.n [2] |
|
|
|
By #1, this is the same as |
|
|
|
(y+k).n - ((y+k).s + (y+k).d) = x.n [3] |
|
|
|
By #5, (y+k).n = y.n + k, which equals x.n + k because x.n=y.n at the start. |
|
Substituting that into [3], |
|
|
|
x.n + k - (y+k).s - (y+k).d = x.n; the x.n terms cancel, leaving |
|
k - (y+k).s - (y+k).d = 0; rearranging, |
|
k = (y+k).s - (y+k).d; by #4, (y+k).s == y.s, so |
|
k = y.s - (y+k).d |
|
|
|
On the RHS, (y+k).d can't be computed directly, but y.s can be, and we |
|
approximate k by ignoring the (y+k).d term at first. Note that k can't be |
|
very large, since all offset-returning methods return a duration of magnitude |
|
less than 24 hours. For that reason, if y is firmly in std time, (y+k).d must |
|
be 0, so ignoring it has no consequence then. |
|
|
|
In any case, the new value is |
|
|
|
z = y + y.s [4] |
|
|
|
It's helpful to step back at look at [4] from a higher level: it's simply |
|
mapping from UTC to tz's standard time. |
|
|
|
At this point, if |
|
|
|
z.n - z.o = x.n [5] |
|
|
|
we have an equivalent time, and are almost done. The insecurity here is |
|
at the start of daylight time. Picture US Eastern for concreteness. The wall |
|
time jumps from 1:59 to 3:00, and wall hours of the form 2:MM don't make good |
|
sense then. The docs ask that an Eastern tzinfo class consider such a time to |
|
be EDT (because it's "after 2"), which is a redundant spelling of 1:MM EST |
|
on the day DST starts. We want to return the 1:MM EST spelling because that's |
|
the only spelling that makes sense on the local wall clock. |
|
|
|
In fact, if [5] holds at this point, we do have the standard-time spelling, |
|
but that takes a bit of proof. We first prove a stronger result. What's the |
|
difference between the LHS and RHS of [5]? Let |
|
|
|
diff = x.n - (z.n - z.o) [6] |
|
|
|
Now |
|
z.n = by [4] |
|
(y + y.s).n = by #5 |
|
y.n + y.s = since y.n = x.n |
|
x.n + y.s = since z and y are have the same tzinfo member, |
|
y.s = z.s by #2 |
|
x.n + z.s |
|
|
|
Plugging that back into [6] gives |
|
|
|
diff = |
|
x.n - ((x.n + z.s) - z.o) = expanding |
|
x.n - x.n - z.s + z.o = cancelling |
|
- z.s + z.o = by #2 |
|
z.d |
|
|
|
So diff = z.d. |
|
|
|
If [5] is true now, diff = 0, so z.d = 0 too, and we have the standard-time |
|
spelling we wanted in the endcase described above. We're done. Contrarily, |
|
if z.d = 0, then we have a UTC equivalent, and are also done. |
|
|
|
If [5] is not true now, diff = z.d != 0, and z.d is the offset we need to |
|
add to z (in effect, z is in tz's standard time, and we need to shift the |
|
local clock into tz's daylight time). |
|
|
|
Let |
|
|
|
z' = z + z.d = z + diff [7] |
|
|
|
and we can again ask whether |
|
|
|
z'.n - z'.o = x.n [8] |
|
|
|
If so, we're done. If not, the tzinfo class is insane, according to the |
|
assumptions we've made. This also requires a bit of proof. As before, let's |
|
compute the difference between the LHS and RHS of [8] (and skipping some of |
|
the justifications for the kinds of substitutions we've done several times |
|
already): |
|
|
|
diff' = x.n - (z'.n - z'.o) = replacing z'.n via [7] |
|
x.n - (z.n + diff - z'.o) = replacing diff via [6] |
|
x.n - (z.n + x.n - (z.n - z.o) - z'.o) = |
|
x.n - z.n - x.n + z.n - z.o + z'.o = cancel x.n |
|
- z.n + z.n - z.o + z'.o = cancel z.n |
|
- z.o + z'.o = #1 twice |
|
-z.s - z.d + z'.s + z'.d = z and z' have same tzinfo |
|
z'.d - z.d |
|
|
|
So z' is UTC-equivalent to x iff z'.d = z.d at this point. If they are equal, |
|
we've found the UTC-equivalent so are done. In fact, we stop with [7] and |
|
return z', not bothering to compute z'.d. |
|
|
|
How could z.d and z'd differ? z' = z + z.d [7], so merely moving z' by |
|
a dst() offset, and starting *from* a time already in DST (we know z.d != 0), |
|
would have to change the result dst() returns: we start in DST, and moving |
|
a little further into it takes us out of DST. |
|
|
|
There isn't a sane case where this can happen. The closest it gets is at |
|
the end of DST, where there's an hour in UTC with no spelling in a hybrid |
|
tzinfo class. In US Eastern, that's 5:MM UTC = 0:MM EST = 1:MM EDT. During |
|
that hour, on an Eastern clock 1:MM is taken as being in standard time (6:MM |
|
UTC) because the docs insist on that, but 0:MM is taken as being in daylight |
|
time (4:MM UTC). There is no local time mapping to 5:MM UTC. The local |
|
clock jumps from 1:59 back to 1:00 again, and repeats the 1:MM hour in |
|
standard time. Since that's what the local clock *does*, we want to map both |
|
UTC hours 5:MM and 6:MM to 1:MM Eastern. The result is ambiguous |
|
in local time, but so it goes -- it's the way the local clock works. |
|
|
|
When x = 5:MM UTC is the input to this algorithm, x.o=0, y.o=-5 and y.d=0, |
|
so z=0:MM. z.d=60 (minutes) then, so [5] doesn't hold and we keep going. |
|
z' = z + z.d = 1:MM then, and z'.d=0, and z'.d - z.d = -60 != 0 so [8] |
|
(correctly) concludes that z' is not UTC-equivalent to x. |
|
|
|
Because we know z.d said z was in daylight time (else [5] would have held and |
|
we would have stopped then), and we know z.d != z'.d (else [8] would have held |
|
and we would have stopped then), and there are only 2 possible values dst() can |
|
return in Eastern, it follows that z'.d must be 0 (which it is in the example, |
|
but the reasoning doesn't depend on the example -- it depends on there being |
|
two possible dst() outcomes, one zero and the other non-zero). Therefore |
|
z' must be in standard time, and is the spelling we want in this case. |
|
|
|
Note again that z' is not UTC-equivalent as far as the hybrid tzinfo class is |
|
concerned (because it takes z' as being in standard time rather than the |
|
daylight time we intend here), but returning it gives the real-life "local |
|
clock repeats an hour" behavior when mapping the "unspellable" UTC hour into |
|
tz. |
|
|
|
When the input is 6:MM, z=1:MM and z.d=0, and we stop at once, again with |
|
the 1:MM standard time spelling we want. |
|
|
|
So how can this break? One of the assumptions must be violated. Two |
|
possibilities: |
|
|
|
1) [2] effectively says that y.s is invariant across all y belong to a given |
|
time zone. This isn't true if, for political reasons or continental drift, |
|
a region decides to change its base offset from UTC. |
|
|
|
2) There may be versions of "double daylight" time where the tail end of |
|
the analysis gives up a step too early. I haven't thought about that |
|
enough to say. |
|
|
|
In any case, it's clear that the default fromutc() is strong enough to handle |
|
"almost all" time zones: so long as the standard offset is invariant, it |
|
doesn't matter if daylight time transition points change from year to year, or |
|
if daylight time is skipped in some years; it doesn't matter how large or |
|
small dst() may get within its bounds; and it doesn't even matter if some |
|
perverse time zone returns a negative dst()). So a breaking case must be |
|
pretty bizarre, and a tzinfo subclass can override fromutc() if it is. |
|
--------------------------------------------------------------------------- */
|
|
|