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datetime.h
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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 class */ } 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" /* "magic" constant used to partially protect against developer mistakes. */ #define DATETIME_API_MAGIC 0x414548d5 #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 = NULL; #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