151 lines
4.7 KiB
C
151 lines
4.7 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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/* 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 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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#endif
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