/Modules/datetimemodule.c
C | 5082 lines | 3579 code | 588 blank | 915 comment | 811 complexity | b4ed2e757fdff99a36013356d213a16c MD5 | raw file
Possible License(s): 0BSD, BSD-3-Clause
- /* C implementation for the date/time type documented at
- * http://www.zope.org/Members/fdrake/DateTimeWiki/FrontPage
- */
- #define PY_SSIZE_T_CLEAN
- #include "Python.h"
- #include "modsupport.h"
- #include "structmember.h"
- #include <time.h>
- #include "timefuncs.h"
- /* Differentiate between building the core module and building extension
- * modules.
- */
- #ifndef Py_BUILD_CORE
- #define Py_BUILD_CORE
- #endif
- #include "datetime.h"
- #undef Py_BUILD_CORE
- /* We require that C int be at least 32 bits, and use int virtually
- * everywhere. In just a few cases we use a temp long, where a Python
- * API returns a C long. In such cases, we have to ensure that the
- * final result fits in a C int (this can be an issue on 64-bit boxes).
- */
- #if SIZEOF_INT < 4
- # error "datetime.c requires that C int have at least 32 bits"
- #endif
- #define MINYEAR 1
- #define MAXYEAR 9999
- /* Nine decimal digits is easy to communicate, and leaves enough room
- * so that two delta days can be added w/o fear of overflowing a signed
- * 32-bit int, and with plenty of room left over to absorb any possible
- * carries from adding seconds.
- */
- #define MAX_DELTA_DAYS 999999999
- /* Rename the long macros in datetime.h to more reasonable short names. */
- #define GET_YEAR PyDateTime_GET_YEAR
- #define GET_MONTH PyDateTime_GET_MONTH
- #define GET_DAY PyDateTime_GET_DAY
- #define DATE_GET_HOUR PyDateTime_DATE_GET_HOUR
- #define DATE_GET_MINUTE PyDateTime_DATE_GET_MINUTE
- #define DATE_GET_SECOND PyDateTime_DATE_GET_SECOND
- #define DATE_GET_MICROSECOND PyDateTime_DATE_GET_MICROSECOND
- /* Date accessors for date and datetime. */
- #define SET_YEAR(o, v) (((o)->data[0] = ((v) & 0xff00) >> 8), \
- ((o)->data[1] = ((v) & 0x00ff)))
- #define SET_MONTH(o, v) (PyDateTime_GET_MONTH(o) = (v))
- #define SET_DAY(o, v) (PyDateTime_GET_DAY(o) = (v))
- /* Date/Time accessors for datetime. */
- #define DATE_SET_HOUR(o, v) (PyDateTime_DATE_GET_HOUR(o) = (v))
- #define DATE_SET_MINUTE(o, v) (PyDateTime_DATE_GET_MINUTE(o) = (v))
- #define DATE_SET_SECOND(o, v) (PyDateTime_DATE_GET_SECOND(o) = (v))
- #define DATE_SET_MICROSECOND(o, v) \
- (((o)->data[7] = ((v) & 0xff0000) >> 16), \
- ((o)->data[8] = ((v) & 0x00ff00) >> 8), \
- ((o)->data[9] = ((v) & 0x0000ff)))
- /* Time accessors for time. */
- #define TIME_GET_HOUR PyDateTime_TIME_GET_HOUR
- #define TIME_GET_MINUTE PyDateTime_TIME_GET_MINUTE
- #define TIME_GET_SECOND PyDateTime_TIME_GET_SECOND
- #define TIME_GET_MICROSECOND PyDateTime_TIME_GET_MICROSECOND
- #define TIME_SET_HOUR(o, v) (PyDateTime_TIME_GET_HOUR(o) = (v))
- #define TIME_SET_MINUTE(o, v) (PyDateTime_TIME_GET_MINUTE(o) = (v))
- #define TIME_SET_SECOND(o, v) (PyDateTime_TIME_GET_SECOND(o) = (v))
- #define TIME_SET_MICROSECOND(o, v) \
- (((o)->data[3] = ((v) & 0xff0000) >> 16), \
- ((o)->data[4] = ((v) & 0x00ff00) >> 8), \
- ((o)->data[5] = ((v) & 0x0000ff)))
- /* Delta accessors for timedelta. */
- #define GET_TD_DAYS(o) (((PyDateTime_Delta *)(o))->days)
- #define GET_TD_SECONDS(o) (((PyDateTime_Delta *)(o))->seconds)
- #define GET_TD_MICROSECONDS(o) (((PyDateTime_Delta *)(o))->microseconds)
- #define SET_TD_DAYS(o, v) ((o)->days = (v))
- #define SET_TD_SECONDS(o, v) ((o)->seconds = (v))
- #define SET_TD_MICROSECONDS(o, v) ((o)->microseconds = (v))
- /* p is a pointer to a time or a datetime object; HASTZINFO(p) returns
- * p->hastzinfo.
- */
- #define HASTZINFO(p) (((_PyDateTime_BaseTZInfo *)(p))->hastzinfo)
- /* M is a char or int claiming to be a valid month. The macro is equivalent
- * to the two-sided Python test
- * 1 <= M <= 12
- */
- #define MONTH_IS_SANE(M) ((unsigned int)(M) - 1 < 12)
- /* Forward declarations. */
- static PyTypeObject PyDateTime_DateType;
- static PyTypeObject PyDateTime_DateTimeType;
- static PyTypeObject PyDateTime_DeltaType;
- static PyTypeObject PyDateTime_TimeType;
- static PyTypeObject PyDateTime_TZInfoType;
- /* ---------------------------------------------------------------------------
- * Math utilities.
- */
- /* k = i+j overflows iff k differs in sign from both inputs,
- * iff k^i has sign bit set and k^j has sign bit set,
- * iff (k^i)&(k^j) has sign bit set.
- */
- #define SIGNED_ADD_OVERFLOWED(RESULT, I, J) \
- ((((RESULT) ^ (I)) & ((RESULT) ^ (J))) < 0)
- /* Compute Python divmod(x, y), returning the quotient and storing the
- * remainder into *r. The quotient is the floor of x/y, and that's
- * the real point of this. C will probably truncate instead (C99
- * requires truncation; C89 left it implementation-defined).
- * Simplification: we *require* that y > 0 here. That's appropriate
- * for all the uses made of it. This simplifies the code and makes
- * the overflow case impossible (divmod(LONG_MIN, -1) is the only
- * overflow case).
- */
- static int
- divmod(int x, int y, int *r)
- {
- int quo;
- assert(y > 0);
- quo = x / y;
- *r = x - quo * y;
- if (*r < 0) {
- --quo;
- *r += y;
- }
- assert(0 <= *r && *r < y);
- return quo;
- }
- /* Round a double to the nearest long. |x| must be small enough to fit
- * in a C long; this is not checked.
- */
- static long
- round_to_long(double x)
- {
- if (x >= 0.0)
- x = floor(x + 0.5);
- else
- x = ceil(x - 0.5);
- return (long)x;
- }
- /* ---------------------------------------------------------------------------
- * General calendrical helper functions
- */
- /* For each month ordinal in 1..12, the number of days in that month,
- * and the number of days before that month in the same year. These
- * are correct for non-leap years only.
- */
- static int _days_in_month[] = {
- 0, /* unused; this vector uses 1-based indexing */
- 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
- };
- static int _days_before_month[] = {
- 0, /* unused; this vector uses 1-based indexing */
- 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
- };
- /* year -> 1 if leap year, else 0. */
- static int
- is_leap(int year)
- {
- /* Cast year to unsigned. The result is the same either way, but
- * C can generate faster code for unsigned mod than for signed
- * mod (especially for % 4 -- a good compiler should just grab
- * the last 2 bits when the LHS is unsigned).
- */
- const unsigned int ayear = (unsigned int)year;
- return ayear % 4 == 0 && (ayear % 100 != 0 || ayear % 400 == 0);
- }
- /* year, month -> number of days in that month in that year */
- static int
- days_in_month(int year, int month)
- {
- assert(month >= 1);
- assert(month <= 12);
- if (month == 2 && is_leap(year))
- return 29;
- else
- return _days_in_month[month];
- }
- /* year, month -> number of days in year preceeding first day of month */
- static int
- days_before_month(int year, int month)
- {
- int days;
- assert(month >= 1);
- assert(month <= 12);
- days = _days_before_month[month];
- if (month > 2 && is_leap(year))
- ++days;
- return days;
- }
- /* year -> number of days before January 1st of year. Remember that we
- * start with year 1, so days_before_year(1) == 0.
- */
- static int
- days_before_year(int year)
- {
- int y = year - 1;
- /* This is incorrect if year <= 0; we really want the floor
- * here. But so long as MINYEAR is 1, the smallest year this
- * can see is 0 (this can happen in some normalization endcases),
- * so we'll just special-case that.
- */
- assert (year >= 0);
- if (y >= 0)
- return y*365 + y/4 - y/100 + y/400;
- else {
- assert(y == -1);
- return -366;
- }
- }
- /* Number of days in 4, 100, and 400 year cycles. That these have
- * the correct values is asserted in the module init function.
- */
- #define DI4Y 1461 /* days_before_year(5); days in 4 years */
- #define DI100Y 36524 /* days_before_year(101); days in 100 years */
- #define DI400Y 146097 /* days_before_year(401); days in 400 years */
- /* ordinal -> year, month, day, considering 01-Jan-0001 as day 1. */
- static void
- ord_to_ymd(int ordinal, int *year, int *month, int *day)
- {
- int n, n1, n4, n100, n400, leapyear, preceding;
- /* ordinal is a 1-based index, starting at 1-Jan-1. The pattern of
- * leap years repeats exactly every 400 years. The basic strategy is
- * to find the closest 400-year boundary at or before ordinal, then
- * work with the offset from that boundary to ordinal. Life is much
- * clearer if we subtract 1 from ordinal first -- then the values
- * of ordinal at 400-year boundaries are exactly those divisible
- * by DI400Y:
- *
- * D M Y n n-1
- * -- --- ---- ---------- ----------------
- * 31 Dec -400 -DI400Y -DI400Y -1
- * 1 Jan -399 -DI400Y +1 -DI400Y 400-year boundary
- * ...
- * 30 Dec 000 -1 -2
- * 31 Dec 000 0 -1
- * 1 Jan 001 1 0 400-year boundary
- * 2 Jan 001 2 1
- * 3 Jan 001 3 2
- * ...
- * 31 Dec 400 DI400Y DI400Y -1
- * 1 Jan 401 DI400Y +1 DI400Y 400-year boundary
- */
- assert(ordinal >= 1);
- --ordinal;
- n400 = ordinal / DI400Y;
- n = ordinal % DI400Y;
- *year = n400 * 400 + 1;
- /* Now n is the (non-negative) offset, in days, from January 1 of
- * year, to the desired date. Now compute how many 100-year cycles
- * precede n.
- * Note that it's possible for n100 to equal 4! In that case 4 full
- * 100-year cycles precede the desired day, which implies the
- * desired day is December 31 at the end of a 400-year cycle.
- */
- n100 = n / DI100Y;
- n = n % DI100Y;
- /* Now compute how many 4-year cycles precede it. */
- n4 = n / DI4Y;
- n = n % DI4Y;
- /* And now how many single years. Again n1 can be 4, and again
- * meaning that the desired day is December 31 at the end of the
- * 4-year cycle.
- */
- n1 = n / 365;
- n = n % 365;
- *year += n100 * 100 + n4 * 4 + n1;
- if (n1 == 4 || n100 == 4) {
- assert(n == 0);
- *year -= 1;
- *month = 12;
- *day = 31;
- return;
- }
- /* Now the year is correct, and n is the offset from January 1. We
- * find the month via an estimate that's either exact or one too
- * large.
- */
- leapyear = n1 == 3 && (n4 != 24 || n100 == 3);
- assert(leapyear == is_leap(*year));
- *month = (n + 50) >> 5;
- preceding = (_days_before_month[*month] + (*month > 2 && leapyear));
- if (preceding > n) {
- /* estimate is too large */
- *month -= 1;
- preceding -= days_in_month(*year, *month);
- }
- n -= preceding;
- assert(0 <= n);
- assert(n < days_in_month(*year, *month));
- *day = n + 1;
- }
- /* year, month, day -> ordinal, considering 01-Jan-0001 as day 1. */
- static int
- ymd_to_ord(int year, int month, int day)
- {
- return days_before_year(year) + days_before_month(year, month) + day;
- }
- /* Day of week, where Monday==0, ..., Sunday==6. 1/1/1 was a Monday. */
- static int
- weekday(int year, int month, int day)
- {
- return (ymd_to_ord(year, month, day) + 6) % 7;
- }
- /* Ordinal of the Monday starting week 1 of the ISO year. Week 1 is the
- * first calendar week containing a Thursday.
- */
- static int
- iso_week1_monday(int year)
- {
- int first_day = ymd_to_ord(year, 1, 1); /* ord of 1/1 */
- /* 0 if 1/1 is a Monday, 1 if a Tue, etc. */
- int first_weekday = (first_day + 6) % 7;
- /* ordinal of closest Monday at or before 1/1 */
- int week1_monday = first_day - first_weekday;
- if (first_weekday > 3) /* if 1/1 was Fri, Sat, Sun */
- week1_monday += 7;
- return week1_monday;
- }
- /* ---------------------------------------------------------------------------
- * Range checkers.
- */
- /* Check that -MAX_DELTA_DAYS <= days <= MAX_DELTA_DAYS. If so, return 0.
- * If not, raise OverflowError and return -1.
- */
- static int
- check_delta_day_range(int days)
- {
- if (-MAX_DELTA_DAYS <= days && days <= MAX_DELTA_DAYS)
- return 0;
- PyErr_Format(PyExc_OverflowError,
- "days=%d; must have magnitude <= %d",
- days, MAX_DELTA_DAYS);
- return -1;
- }
- /* Check that date arguments are in range. Return 0 if they are. If they
- * aren't, raise ValueError and return -1.
- */
- static int
- check_date_args(int year, int month, int day)
- {
- if (year < MINYEAR || year > MAXYEAR) {
- PyErr_SetString(PyExc_ValueError,
- "year is out of range");
- return -1;
- }
- if (month < 1 || month > 12) {
- PyErr_SetString(PyExc_ValueError,
- "month must be in 1..12");
- return -1;
- }
- if (day < 1 || day > days_in_month(year, month)) {
- PyErr_SetString(PyExc_ValueError,
- "day is out of range for month");
- return -1;
- }
- return 0;
- }
- /* Check that time arguments are in range. Return 0 if they are. If they
- * aren't, raise ValueError and return -1.
- */
- static int
- check_time_args(int h, int m, int s, int us)
- {
- if (h < 0 || h > 23) {
- PyErr_SetString(PyExc_ValueError,
- "hour must be in 0..23");
- return -1;
- }
- if (m < 0 || m > 59) {
- PyErr_SetString(PyExc_ValueError,
- "minute must be in 0..59");
- return -1;
- }
- if (s < 0 || s > 59) {
- PyErr_SetString(PyExc_ValueError,
- "second must be in 0..59");
- return -1;
- }
- if (us < 0 || us > 999999) {
- PyErr_SetString(PyExc_ValueError,
- "microsecond must be in 0..999999");
- return -1;
- }
- return 0;
- }
- /* ---------------------------------------------------------------------------
- * Normalization utilities.
- */
- /* 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
- * at least factor, enough of *lo is converted into "hi" units so that
- * 0 <= *lo < factor. The input values must be such that int overflow
- * is impossible.
- */
- static void
- normalize_pair(int *hi, int *lo, int factor)
- {
- assert(factor > 0);
- assert(lo != hi);
- if (*lo < 0 || *lo >= factor) {
- const int num_hi = divmod(*lo, factor, lo);
- const int new_hi = *hi + num_hi;
- assert(! SIGNED_ADD_OVERFLOWED(new_hi, *hi, num_hi));
- *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, Py_ssize_t 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, Py_ssize_t 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'",
- Py_TYPE(p)->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, Py_TYPE(u)->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'",
- Py_TYPE(result)->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 const char *DayNames[] = {
- "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"
- };
- static const 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;
- assert(buflen >= 1);
- 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;
- }
- static PyObject *
- make_freplacement(PyObject *object)
- {
- char freplacement[64];
- if (PyTime_Check(object))
- sprintf(freplacement, "%06d", TIME_GET_MICROSECOND(object));
- else if (PyDateTime_Check(object))
- sprintf(freplacement, "%06d", DATE_GET_MICROSECOND(object));
- else
- sprintf(freplacement, "%06d", 0);
- return PyString_FromStringAndSize(freplacement, strlen(freplacement));
- }
- /* 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, %Z and %f 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, const char *format, size_t format_len,
- 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 */
- PyObject *freplacement = NULL; /* py string, replacement for %f */
- const 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 */
- size_t totalnew; /* number bytes total in output format buffer,
- exclusive of trailing \0 */
- size_t usednew; /* number bytes used so far in output format buffer */
- const char *ptoappend; /* ptr to string to append to output buffer */
- size_t ntoappend; /* # of bytes to append to output buffer */
- assert(object && format && timetuple);
- /* 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/%Z/%f escapes, building
- * a new format. Since computing the replacements for those codes
- * is expensive, don't unless they're actually used.
- */
- if (format_len > INT_MAX - 1) {
- PyErr_NoMemory();
- goto Done;
- }
- totalnew = format_len + 1; /* realistic if no %z/%Z/%f */
- newfmt = PyString_FromStringAndSize(NULL, totalnew);
- if (newfmt == NULL) goto Done;
- pnew = PyString_AsString(newfmt);
- usednew = 0;
- pin = 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_AS_STRING(zreplacement);
- ntoappend = PyString_GET_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;
- if (!PyString_Check(Zreplacement)) {
- PyErr_SetString(PyExc_TypeError, "tzname.replace() did not return a string");
- goto Done;
- }
- }
- else
- Py_DECREF(temp);
- }
- }
- assert(Zreplacement != NULL);
- ptoappend = PyString_AS_STRING(Zreplacement);
- ntoappend = PyString_GET_SIZE(Zreplacement);
- }
- else if (ch == 'f') {
- /* format microseconds */
- if (freplacement == NULL) {
- freplacement = make_freplacement(object);
- if (freplacement == NULL)
- goto Done;
- }
- assert(freplacement != NULL);
- assert(PyString_Check(freplacement));
- ptoappend = PyString_AS_STRING(freplacement);
- ntoappend = PyString_GET_SIZE(freplacement);
- }
- 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(ptoappend != NULL);
- assert(ntoappend >= 0);
- if (ntoappend == 0)
- continue;
- while (usednew + ntoappend > totalnew) {
- size_t 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_ImportModuleNoBlock("time");
- if (time == NULL)
- goto Done;
- result = PyObject_CallMethod(time, "strftime", "OO",
- newfmt, timetuple);
- Py_DECREF(time);
- }
- Done:
- Py_XDECREF(freplacement);
- 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_ImportModuleNoBlock("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_ImportModuleNoBlock("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",
- Py_TYPE(a)->tp_name, Py_TYPE(b)->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, Py_TYPE(num)->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)",
- Py_TYPE(self)->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)",
- Py_TYPE(self)->tp_name,
- GET_TD_DAYS(self),
- GET_TD_SECONDS(self));
- return PyString_FromFormat("%s(%d)",
- Py_TYPE(self)->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", Py_TYPE(self), 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 = {
- PyVarObject_HEAD_INIT(NULL, 0)
- "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 &&
- MONTH_IS_SANE(PyString_AS_STRING(state)[2]))
- {
- PyDateTime_Date *me;
- me = (PyDateTime_Date *) (type->tp_alloc(type, 0));
- 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, double ts)
- {
- struct tm *tm;
- time_t t;
- PyObject *result = NULL;
- t = _PyTime_DoubleToTimet(ts);
- if (t == (time_t)-1 && PyErr_Occurred())
- return 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, 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];
- const char *type_name;
- type_name = Py_TYPE(self)->tp_name;
- PyOS_snprintf(buffer, sizeof(buffer), "%s(%d, %d, %d)",
- type_name,
- 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 *tuple;
- const char *format;
- Py_ssize_t format_len;
- static char *keywords[] = {"format", NULL};
- if (! PyArg_ParseTupleAndKeywords(args, kw, "s#:strftime", keywords,
- &format, &format_len))
- return NULL;
- tuple = PyObject_CallMethod((PyObject *)self, "timetuple", "()");
- if (tuple == NULL)
- return NULL;
- result = wrap_strftime((PyObject *)self, format, format_len, tuple,
- (PyObject *)self);
- Py_DECREF(tuple);
- return result;
- }
- static PyObject *
- date_format(PyDateTime_Date *self, PyObject *args)
- {
- PyObject *format;
- if (!PyArg_ParseTuple(args, "O:__format__", &format))
- return NULL;
- /* Check for str or unicode */
- if (PyString_Check(format)) {
- /* If format is zero length, return str(self) */
- if (PyString_GET_SIZE(format) == 0)
- return PyObject_Str((PyObject *)self);
- } else if (PyUnicode_Check(format)) {
- /* If format is zero length, return str(self) */
- if (PyUnicode_GET_SIZE(format) == 0)
- return PyObject_Unicode((PyObject *)self);
- } else {
- PyErr_Format(PyExc_ValueError,
- "__format__ expects str or unicode, not %.200s",
- Py_TYPE(format)->tp_name);
- return NULL;
- }
- return PyObject_CallMethod((PyObject *)self, "strftime", "O", format);
- }
- /* 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(Py_TYPE(self), 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)", Py_TYPE(self), 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_VARARGS | METH_KEYWORDS,
- PyDoc_STR("format -> strftime() style string.")},
- {"__format__", (PyCFunction)date_format, METH_VARARGS,
- PyDoc_STR("Formats self with strftime.")},
- {"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_VARARGS | 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("date(year, month, day) --> date object");
- 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 = {
- PyVarObject_HEAD_INIT(NULL, 0)
- "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)", Py_TYPE(self), args);
- }
- else
- return Py_BuildValue("(ONN)", Py_TYPE(self), 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 &&
- ((unsigned char) (PyString_AS_STRING(state)[0])) < 24)
- {
- 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 *) (type->tp_alloc(type, 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);
- }
- Py_TYPE(self)->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];
- const char *type_name = Py_TYPE(self)->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)", type_name, h, m, s, us);
- else if (s)
- PyOS_snprintf(buffer, sizeof(buffer),
- "%s(%d, %d, %d)", type_name, h, m, s);
- else
- PyOS_snprintf(buffer, sizeof(buffer),
- "%s(%d, %d)", type_name, 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, PyObject *unused)
- {
- 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 *tuple;
- const char *format;
- Py_ssize_t format_len;
- static char *keywords[] = {"format", NULL};
- if (! PyArg_ParseTupleAndKeywords(args, kw, "s#:strftime", keywords,
- &format, &format_len))
- 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, 1, 1, /* year, month, day */
- TIME_GET_HOUR(self),
- TIME_GET_MINUTE(self),
- TIME_GET_SECOND(self),
- 0, 1, -1); /* weekday, daynum, dst */
- if (tuple == NULL)
- return NULL;
- assert(PyTuple_Size(tuple) == 9);
- result = wrap_strftime((PyObject *)self, format, format_len, 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(Py_TYPE(self), 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 = PyTuple_Pack(1, basestate);
- else
- result = PyTuple_Pack(2, basestate, self->tzinfo);
- Py_DECREF(basestate);
- }
- return result;
- }
- static PyObject *
- time_reduce(PyDateTime_Time *self, PyObject *arg)
- {
- return Py_BuildValue("(ON)", Py_TYPE(self), time_getstate(self));
- }
- static PyMethodDef time_methods[] = {
- {"isoformat", (PyCFunction)time_isoformat, METH_NOARGS,
- PyDoc_STR("Return string in ISO 8601 format, HH:MM:SS[.mmmmmm]"
- "[+HH:MM].")},
- {"strftime", (PyCFunction)time_strftime, METH_VARARGS | METH_KEYWORDS,
- PyDoc_STR("format -> strftime() style string.")},
- {"__format__", (PyCFunction)date_format, METH_VARARGS,
- PyDoc_STR("Formats self with strftime.")},
- {"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_VARARGS | 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([hour[, minute[, second[, microsecond[, tzinfo]]]]]) --> a time object\n\
- \n\
- All arguments are optional. tzinfo may be None, or an instance of\n\
- a tzinfo subclass. The remaining arguments may be ints or longs.\n");
- 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 &&
- MONTH_IS_SANE(PyString_AS_STRING(state)[2]))
- {
- 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 *) (type->tp_alloc(type , 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;
- double fraction;
- int us;
- timet = _PyTime_DoubleToTimet(timestamp);
- if (timet == (time_t)-1 && PyErr_Occurred())
- return NULL;
- fraction = timestamp - (double)timet;
- us = (int)round_to_long(fraction * 1e6);
- if (us < 0) {
- /* Truncation towards zero is not what we wanted
- for negative numbers (Python's mod semantics) */
- timet -= 1;
- us += 1000000;
- }
- /* If timestamp is less than one microsecond smaller than a
- * full second, round up. Otherwise, ValueErrors are raised
- * for some floats. */
- if (us == 1000000) {
- timet += 1;
- us = 0;
- }
- 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 time.strptime(). */
- static PyObject *
- datetime_strptime(PyObject *cls, PyObject *args)
- {
- static PyObject *module = NULL;
- PyObject *result = NULL, *obj, *st = NULL, *frac = NULL;
- const char *string, *format;
- if (!PyArg_ParseTuple(args, "ss:strptime", &string, &format))
- return NULL;
- if (module == NULL &&
- (module = PyImport_ImportModuleNoBlock("_strptime")) == NULL)
- return NULL;
- /* _strptime._strptime returns a two-element tuple. The first
- element is a time.struct_time object. The second is the
- microseconds (which are not defined for time.struct_time). */
- obj = PyObject_CallMethod(module, "_strptime", "ss", string, format);
- if (obj != NULL) {
- int i, good_timetuple = 1;
- long int ia[7];
- if (PySequence_Check(obj) && PySequence_Size(obj) == 2) {
- st = PySequence_GetItem(obj, 0);
- frac = PySequence_GetItem(obj, 1);
- if (st == NULL || frac == NULL)
- good_timetuple = 0;
- /* copy y/m/d/h/m/s values out of the
- time.struct_time */
- if (good_timetuple &&
- PySequence_Check(st) &&
- PySequence_Size(st) >= 6) {
- for (i=0; i < 6; i++) {
- PyObject *p = PySequence_GetItem(st, i);
- if (p == NULL) {
- good_timetuple = 0;
- break;
- }
- if (PyInt_Check(p))
- ia[i] = PyInt_AsLong(p);
- else
- good_timetuple = 0;
- Py_DECREF(p);
- }
- }
- else
- good_timetuple = 0;
- /* follow that up with a little dose of microseconds */
- if (PyInt_Check(frac))
- ia[6] = PyInt_AsLong(frac);
- else
- good_timetuple = 0;
- }
- else
- good_timetuple = 0;
- if (good_timetuple)
- result = PyObject_CallFunction(cls, "iiiiiii",
- ia[0], ia[1], ia[2],
- ia[3], ia[4], ia[5],
- ia[6]);
- else
- PyErr_SetString(PyExc_ValueError,
- "unexpected value from _strptime._strptime");
- }
- Py_XDECREF(obj);
- Py_XDECREF(st);
- Py_XDECREF(frac);
- 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);
- }
- Py_TYPE(self)->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];
- const char *type_name = Py_TYPE(self)->tp_name;
- PyObject *baserepr;
- if (DATE_GET_MICROSECOND(self)) {
- PyOS_snprintf(buffer, sizeof(buffer),
- "%s(%d, %d, %d, %d, %d, %d, %d)",
- type_name,
- 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)",
- type_name,
- 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)",
- type_name,
- 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 other has a "timetuple" attr, that's an advertised
- * hook for other classes to ask to get comparison control.
- * However, date instances have a timetuple attr, and we
- * don't want to allow that comparison. Because datetime
- * is a subclass of date, when mixing date and datetime
- * in a comparison, Python gives datetime the first shot
- * (it's the more specific subtype). So we can stop that
- * combination here reliably.
- */
- if (PyObject_HasAttrString(other, "timetuple") &&
- ! PyDate_Check(other)) {
- /* 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(Py_TYPE(self), 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 = PyTuple_Pack(1, basestate);
- else
- result = PyTuple_Pack(2, basestate, self->tzinfo);
- Py_DECREF(basestate);
- }
- return result;
- }
- static PyObject *
- datetime_reduce(PyDateTime_DateTime *self, PyObject *arg)
- {
- return Py_BuildValue("(ON)", Py_TYPE(self), datetime_getstate(self));
- }
- static PyMethodDef datetime_methods[] = {
- /* Class methods: */
- {"now", (PyCFunction)datetime_now,
- METH_VARARGS | 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_VARARGS | 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()).")},
- {"strptime", (PyCFunction)datetime_strptime,
- METH_VARARGS | METH_CLASS,
- PyDoc_STR("string, format -> new datetime parsed from a string "
- "(like time.strptime()).")},
- {"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_VARARGS | 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_VARARGS | METH_KEYWORDS,
- PyDoc_STR("Return datetime with new specified fields.")},
- {"astimezone", (PyCFunction)datetime_astimezone, METH_VARARGS | 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("datetime(year, month, day[, hour[, minute[, second[, microsecond[,tzinfo]]]]])\n\
- \n\
- The year, month and day arguments are required. tzinfo may be None, or an\n\
- instance of a tzinfo subclass. The remaining arguments may be ints or longs.\n");
- 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}
- };
- /* C API. Clients get at this via PyDateTime_IMPORT, defined in
- * datetime.h.
- */
- static PyDateTime_CAPI CAPI = {
- &PyDateTime_DateType,
- &PyDateTime_DateTimeType,
- &PyDateTime_TimeType,
- &PyDateTime_DeltaType,
- &PyDateTime_TZInfoType,
- new_date_ex,
- new_datetime_ex,
- new_time_ex,
- new_delta_ex,
- datetime_fromtimestamp,
- date_fromtimestamp
- };
- 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 (m == NULL)
- return;
- 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);
- x = PyCObject_FromVoidPtrAndDesc(&CAPI, (void*) DATETIME_API_MAGIC,
- NULL);
- if (x == NULL)
- return;
- PyModule_AddObject(m, "datetime_CAPI", x);
- /* 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.
- --------------------------------------------------------------------------- */