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236 lines (184 loc) · 8 KB
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/* datetime.h
*/
#ifndef DATETIME_H
#define DATETIME_H
#ifdef __cplusplus
extern "C" {
#endif
/* Fields are packed into successive bytes, each viewed as unsigned and
* big-endian, unless otherwise noted:
*
* byte offset
* 0 year 2 bytes, 1-9999
* 2 month 1 byte, 1-12
* 3 day 1 byte, 1-31
* 4 hour 1 byte, 0-23
* 5 minute 1 byte, 0-59
* 6 second 1 byte, 0-59
* 7 usecond 3 bytes, 0-999999
* 10
*/
/* # of bytes for year, month, and day. */
#define _PyDateTime_DATE_DATASIZE 4
/* # of bytes for hour, minute, second, and usecond. */
#define _PyDateTime_TIME_DATASIZE 6
/* # of bytes for year, month, day, hour, minute, second, and usecond. */
#define _PyDateTime_DATETIME_DATASIZE 10
typedef struct
{
PyObject_HEAD
long hashcode; /* -1 when unknown */
int days; /* -MAX_DELTA_DAYS <= days <= MAX_DELTA_DAYS */
int seconds; /* 0 <= seconds < 24*3600 is invariant */
int microseconds; /* 0 <= microseconds < 1000000 is invariant */
} PyDateTime_Delta;
typedef struct
{
PyObject_HEAD /* a pure abstract base clase */
} PyDateTime_TZInfo;
/* The datetime and time types have hashcodes, and an optional tzinfo member,
* present if and only if hastzinfo is true.
*/
#define _PyTZINFO_HEAD \
PyObject_HEAD \
long hashcode; \
char hastzinfo; /* boolean flag */
/* No _PyDateTime_BaseTZInfo is allocated; it's just to have something
* convenient to cast to, when getting at the hastzinfo member of objects
* starting with _PyTZINFO_HEAD.
*/
typedef struct
{
_PyTZINFO_HEAD
} _PyDateTime_BaseTZInfo;
/* All time objects are of PyDateTime_TimeType, but that can be allocated
* in two ways, with or without a tzinfo member. Without is the same as
* tzinfo == None, but consumes less memory. _PyDateTime_BaseTime is an
* internal struct used to allocate the right amount of space for the
* "without" case.
*/
#define _PyDateTime_TIMEHEAD \
_PyTZINFO_HEAD \
unsigned char data[_PyDateTime_TIME_DATASIZE];
typedef struct
{
_PyDateTime_TIMEHEAD
} _PyDateTime_BaseTime; /* hastzinfo false */
typedef struct
{
_PyDateTime_TIMEHEAD
PyObject *tzinfo;
} PyDateTime_Time; /* hastzinfo true */
/* All datetime objects are of PyDateTime_DateTimeType, but that can be
* allocated in two ways too, just like for time objects above. In addition,
* the plain date type is a base class for datetime, so it must also have
* a hastzinfo member (although it's unused there).
*/
typedef struct
{
_PyTZINFO_HEAD
unsigned char data[_PyDateTime_DATE_DATASIZE];
} PyDateTime_Date;
#define _PyDateTime_DATETIMEHEAD \
_PyTZINFO_HEAD \
unsigned char data[_PyDateTime_DATETIME_DATASIZE];
typedef struct
{
_PyDateTime_DATETIMEHEAD
} _PyDateTime_BaseDateTime; /* hastzinfo false */
typedef struct
{
_PyDateTime_DATETIMEHEAD
PyObject *tzinfo;
} PyDateTime_DateTime; /* hastzinfo true */
/* Apply for date and datetime instances. */
#define PyDateTime_GET_YEAR(o) ((((PyDateTime_Date*)o)->data[0] << 8) | \
((PyDateTime_Date*)o)->data[1])
#define PyDateTime_GET_MONTH(o) (((PyDateTime_Date*)o)->data[2])
#define PyDateTime_GET_DAY(o) (((PyDateTime_Date*)o)->data[3])
#define PyDateTime_DATE_GET_HOUR(o) (((PyDateTime_DateTime*)o)->data[4])
#define PyDateTime_DATE_GET_MINUTE(o) (((PyDateTime_DateTime*)o)->data[5])
#define PyDateTime_DATE_GET_SECOND(o) (((PyDateTime_DateTime*)o)->data[6])
#define PyDateTime_DATE_GET_MICROSECOND(o) \
((((PyDateTime_DateTime*)o)->data[7] << 16) | \
(((PyDateTime_DateTime*)o)->data[8] << 8) | \
((PyDateTime_DateTime*)o)->data[9])
/* Apply for time instances. */
#define PyDateTime_TIME_GET_HOUR(o) (((PyDateTime_Time*)o)->data[0])
#define PyDateTime_TIME_GET_MINUTE(o) (((PyDateTime_Time*)o)->data[1])
#define PyDateTime_TIME_GET_SECOND(o) (((PyDateTime_Time*)o)->data[2])
#define PyDateTime_TIME_GET_MICROSECOND(o) \
((((PyDateTime_Time*)o)->data[3] << 16) | \
(((PyDateTime_Time*)o)->data[4] << 8) | \
((PyDateTime_Time*)o)->data[5])
/* Define structure for C API. */
typedef struct {
/* type objects */
PyTypeObject *DateType;
PyTypeObject *DateTimeType;
PyTypeObject *TimeType;
PyTypeObject *DeltaType;
PyTypeObject *TZInfoType;
/* constructors */
PyObject *(*Date_FromDate)(int, int, int, PyTypeObject*);
PyObject *(*DateTime_FromDateAndTime)(int, int, int, int, int, int, int,
PyObject*, PyTypeObject*);
PyObject *(*Time_FromTime)(int, int, int, int, PyObject*, PyTypeObject*);
PyObject *(*Delta_FromDelta)(int, int, int, int, PyTypeObject*);
/* constructors for the DB API */
PyObject *(*DateTime_FromTimestamp)(PyObject*, PyObject*, PyObject*);
PyObject *(*Date_FromTimestamp)(PyObject*, PyObject*);
} PyDateTime_CAPI;
#define PyDateTime_CAPSULE_NAME "datetime.datetime_CAPI"
#ifdef Py_BUILD_CORE
/* Macros for type checking when building the Python core. */
#define PyDate_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateType)
#define PyDate_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DateType)
#define PyDateTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateTimeType)
#define PyDateTime_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DateTimeType)
#define PyTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_TimeType)
#define PyTime_CheckExact(op) (Py_TYPE(op) == &PyDateTime_TimeType)
#define PyDelta_Check(op) PyObject_TypeCheck(op, &PyDateTime_DeltaType)
#define PyDelta_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DeltaType)
#define PyTZInfo_Check(op) PyObject_TypeCheck(op, &PyDateTime_TZInfoType)
#define PyTZInfo_CheckExact(op) (Py_TYPE(op) == &PyDateTime_TZInfoType)
#else
/* Define global variable for the C API and a macro for setting it. */
static PyDateTime_CAPI *PyDateTimeAPI;
#define PyDateTime_IMPORT \
PyDateTimeAPI = (PyDateTime_CAPI *)PyCapsule_Import(PyDateTime_CAPSULE_NAME, 0)
/* Macros for type checking when not building the Python core. */
#define PyDate_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateType)
#define PyDate_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DateType)
#define PyDateTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateTimeType)
#define PyDateTime_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DateTimeType)
#define PyTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TimeType)
#define PyTime_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->TimeType)
#define PyDelta_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DeltaType)
#define PyDelta_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DeltaType)
#define PyTZInfo_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TZInfoType)
#define PyTZInfo_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->TZInfoType)
/* Macros for accessing constructors in a simplified fashion. */
#define PyDate_FromDate(year, month, day) \
PyDateTimeAPI->Date_FromDate(year, month, day, PyDateTimeAPI->DateType)
#define PyDateTime_FromDateAndTime(year, month, day, hour, min, sec, usec) \
PyDateTimeAPI->DateTime_FromDateAndTime(year, month, day, hour, \
min, sec, usec, Py_None, PyDateTimeAPI->DateTimeType)
#define PyTime_FromTime(hour, minute, second, usecond) \
PyDateTimeAPI->Time_FromTime(hour, minute, second, usecond, \
Py_None, PyDateTimeAPI->TimeType)
#define PyDelta_FromDSU(days, seconds, useconds) \
PyDateTimeAPI->Delta_FromDelta(days, seconds, useconds, 1, \
PyDateTimeAPI->DeltaType)
/* Macros supporting the DB API. */
#define PyDateTime_FromTimestamp(args) \
PyDateTimeAPI->DateTime_FromTimestamp( \
(PyObject*) (PyDateTimeAPI->DateTimeType), args, NULL)
#define PyDate_FromTimestamp(args) \
PyDateTimeAPI->Date_FromTimestamp( \
(PyObject*) (PyDateTimeAPI->DateType), args)
#endif /* Py_BUILD_CORE */
#ifdef __cplusplus
}
#endif
#endif