246 lines
8.1 KiB
C
246 lines
8.1 KiB
C
/* datetime.h
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*/
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#ifndef DATETIME_H
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#define DATETIME_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Fields are packed into successive bytes, each viewed as unsigned and
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* big-endian, unless otherwise noted:
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*
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* byte offset
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* 0 year 2 bytes, 1-9999
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* 2 month 1 byte, 1-12
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* 3 day 1 byte, 1-31
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* 4 hour 1 byte, 0-23
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* 5 minute 1 byte, 0-59
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* 6 second 1 byte, 0-59
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* 7 usecond 3 bytes, 0-999999
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* 10
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*/
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/* # of bytes for year, month, and day. */
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#define _PyDateTime_DATE_DATASIZE 4
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/* # of bytes for hour, minute, second, and usecond. */
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#define _PyDateTime_TIME_DATASIZE 6
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/* # of bytes for year, month, day, hour, minute, second, and usecond. */
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#define _PyDateTime_DATETIME_DATASIZE 10
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typedef struct
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{
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PyObject_HEAD
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long hashcode; /* -1 when unknown */
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int days; /* -MAX_DELTA_DAYS <= days <= MAX_DELTA_DAYS */
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int seconds; /* 0 <= seconds < 24*3600 is invariant */
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int microseconds; /* 0 <= microseconds < 1000000 is invariant */
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} PyDateTime_Delta;
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typedef struct
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{
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PyObject_HEAD /* a pure abstract base clase */
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} PyDateTime_TZInfo;
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/* The datetime and time types have hashcodes, and an optional tzinfo member,
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* present if and only if hastzinfo is true.
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*/
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#define _PyTZINFO_HEAD \
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PyObject_HEAD \
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long hashcode; \
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char hastzinfo; /* boolean flag */
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/* No _PyDateTime_BaseTZInfo is allocated; it's just to have something
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* convenient to cast to, when getting at the hastzinfo member of objects
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* starting with _PyTZINFO_HEAD.
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*/
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typedef struct
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{
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_PyTZINFO_HEAD
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} _PyDateTime_BaseTZInfo;
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/* All time objects are of PyDateTime_TimeType, but that can be allocated
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* in two ways, with or without a tzinfo member. Without is the same as
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* tzinfo == None, but consumes less memory. _PyDateTime_BaseTime is an
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* internal struct used to allocate the right amount of space for the
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* "without" case.
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*/
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#define _PyDateTime_TIMEHEAD \
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_PyTZINFO_HEAD \
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unsigned char data[_PyDateTime_TIME_DATASIZE];
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typedef struct
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{
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_PyDateTime_TIMEHEAD
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} _PyDateTime_BaseTime; /* hastzinfo false */
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typedef struct
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{
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_PyDateTime_TIMEHEAD
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PyObject *tzinfo;
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} PyDateTime_Time; /* hastzinfo true */
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/* All datetime objects are of PyDateTime_DateTimeType, but that can be
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* allocated in two ways too, just like for time objects above. In addition,
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* the plain date type is a base class for datetime, so it must also have
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* a hastzinfo member (although it's unused there).
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*/
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typedef struct
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{
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_PyTZINFO_HEAD
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unsigned char data[_PyDateTime_DATE_DATASIZE];
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} PyDateTime_Date;
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#define _PyDateTime_DATETIMEHEAD \
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_PyTZINFO_HEAD \
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unsigned char data[_PyDateTime_DATETIME_DATASIZE];
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typedef struct
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{
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_PyDateTime_DATETIMEHEAD
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} _PyDateTime_BaseDateTime; /* hastzinfo false */
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typedef struct
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{
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_PyDateTime_DATETIMEHEAD
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PyObject *tzinfo;
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} PyDateTime_DateTime; /* hastzinfo true */
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/* Apply for date and datetime instances. */
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#define PyDateTime_GET_YEAR(o) ((((PyDateTime_Date*)o)->data[0] << 8) | \
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((PyDateTime_Date*)o)->data[1])
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#define PyDateTime_GET_MONTH(o) (((PyDateTime_Date*)o)->data[2])
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#define PyDateTime_GET_DAY(o) (((PyDateTime_Date*)o)->data[3])
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#define PyDateTime_DATE_GET_HOUR(o) (((PyDateTime_DateTime*)o)->data[4])
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#define PyDateTime_DATE_GET_MINUTE(o) (((PyDateTime_DateTime*)o)->data[5])
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#define PyDateTime_DATE_GET_SECOND(o) (((PyDateTime_DateTime*)o)->data[6])
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#define PyDateTime_DATE_GET_MICROSECOND(o) \
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((((PyDateTime_DateTime*)o)->data[7] << 16) | \
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(((PyDateTime_DateTime*)o)->data[8] << 8) | \
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((PyDateTime_DateTime*)o)->data[9])
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/* Apply for time instances. */
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#define PyDateTime_TIME_GET_HOUR(o) (((PyDateTime_Time*)o)->data[0])
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#define PyDateTime_TIME_GET_MINUTE(o) (((PyDateTime_Time*)o)->data[1])
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#define PyDateTime_TIME_GET_SECOND(o) (((PyDateTime_Time*)o)->data[2])
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#define PyDateTime_TIME_GET_MICROSECOND(o) \
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((((PyDateTime_Time*)o)->data[3] << 16) | \
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(((PyDateTime_Time*)o)->data[4] << 8) | \
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((PyDateTime_Time*)o)->data[5])
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/* Define structure for C API. */
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typedef struct {
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/* type objects */
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PyTypeObject *DateType;
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PyTypeObject *DateTimeType;
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PyTypeObject *TimeType;
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PyTypeObject *DeltaType;
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PyTypeObject *TZInfoType;
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/* constructors */
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PyObject *(*Date_FromDate)(int, int, int, PyTypeObject*);
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PyObject *(*DateTime_FromDateAndTime)(int, int, int, int, int, int, int,
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PyObject*, PyTypeObject*);
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PyObject *(*Time_FromTime)(int, int, int, int, PyObject*, PyTypeObject*);
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PyObject *(*Delta_FromDelta)(int, int, int, int, PyTypeObject*);
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/* constructors for the DB API */
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PyObject *(*DateTime_FromTimestamp)(PyObject*, PyObject*, PyObject*);
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PyObject *(*Date_FromTimestamp)(PyObject*, PyObject*);
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} PyDateTime_CAPI;
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/* "magic" constant used to partially protect against developer mistakes. */
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#define DATETIME_API_MAGIC 0x414548d5
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#ifdef Py_BUILD_CORE
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/* Macros for type checking when building the Python core. */
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#define PyDate_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateType)
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#define PyDate_CheckExact(op) ((op)->ob_type == &PyDateTime_DateType)
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#define PyDateTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateTimeType)
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#define PyDateTime_CheckExact(op) ((op)->ob_type == &PyDateTime_DateTimeType)
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#define PyTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_TimeType)
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#define PyTime_CheckExact(op) ((op)->ob_type == &PyDateTime_TimeType)
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#define PyDelta_Check(op) PyObject_TypeCheck(op, &PyDateTime_DeltaType)
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#define PyDelta_CheckExact(op) ((op)->ob_type == &PyDateTime_DeltaType)
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#define PyTZInfo_Check(op) PyObject_TypeCheck(op, &PyDateTime_TZInfoType)
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#define PyTZInfo_CheckExact(op) ((op)->ob_type == &PyDateTime_TZInfoType)
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#else
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/* Define global variable for the C API and a macro for setting it. */
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static PyDateTime_CAPI *PyDateTimeAPI;
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#define PyDateTime_IMPORT \
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PyDateTimeAPI = (PyDateTime_CAPI*) PyCObject_Import("datetime", \
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"datetime_CAPI")
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/* This macro would be used if PyCObject_ImportEx() was created.
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#define PyDateTime_IMPORT \
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PyDateTimeAPI = (PyDateTime_CAPI*) PyCObject_ImportEx("datetime", \
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"datetime_CAPI", \
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DATETIME_API_MAGIC)
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*/
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/* Macros for type checking when not building the Python core. */
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#define PyDate_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateType)
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#define PyDate_CheckExact(op) ((op)->ob_type == PyDateTimeAPI->DateType)
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#define PyDateTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateTimeType)
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#define PyDateTime_CheckExact(op) ((op)->ob_type == PyDateTimeAPI->DateTimeType)
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#define PyTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TimeType)
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#define PyTime_CheckExact(op) ((op)->ob_type == PyDateTimeAPI->TimeType)
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#define PyDelta_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DeltaType)
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#define PyDelta_CheckExact(op) ((op)->ob_type == PyDateTimeAPI->DeltaType)
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#define PyTZInfo_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TZInfoType)
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#define PyTZInfo_CheckExact(op) ((op)->ob_type == PyDateTimeAPI->TZInfoType)
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/* Macros for accessing constructors in a simplified fashion. */
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#define PyDate_FromDate(year, month, day) \
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PyDateTimeAPI->Date_FromDate(year, month, day, PyDateTimeAPI->DateType)
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#define PyDateTime_FromDateAndTime(year, month, day, hour, min, sec, usec) \
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PyDateTimeAPI->DateTime_FromDateAndTime(year, month, day, hour, \
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min, sec, usec, Py_None, PyDateTimeAPI->DateTimeType)
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#define PyTime_FromTime(hour, minute, second, usecond) \
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PyDateTimeAPI->Time_FromTime(hour, minute, second, usecond, \
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Py_None, PyDateTimeAPI->TimeType)
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#define PyDelta_FromDSU(days, seconds, useconds) \
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PyDateTimeAPI->Delta_FromDelta(days, seconds, useconds, 1, \
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PyDateTimeAPI->DeltaType)
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/* Macros supporting the DB API. */
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#define PyDateTime_FromTimestamp(args) \
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PyDateTimeAPI->DateTime_FromTimestamp( \
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(PyObject*) (PyDateTimeAPI->DateTimeType), args, NULL)
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#define PyDate_FromTimestamp(args) \
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PyDateTimeAPI->Date_FromTimestamp( \
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(PyObject*) (PyDateTimeAPI->DateType), args)
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#endif /* Py_BUILD_CORE */
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#ifdef __cplusplus
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}
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#endif
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#endif
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