1 /* datetime.h 2 */ 3 4 #ifndef DATETIME_H 5 #define DATETIME_H 6 #ifdef __cplusplus 7 extern "C" { 8 #endif 9 10 /* Fields are packed into successive bytes, each viewed as unsigned and 11 * big-endian, unless otherwise noted: 12 * 13 * byte offset 14 * 0 year 2 bytes, 1-9999 15 * 2 month 1 byte, 1-12 16 * 3 day 1 byte, 1-31 17 * 4 hour 1 byte, 0-23 18 * 5 minute 1 byte, 0-59 19 * 6 second 1 byte, 0-59 20 * 7 usecond 3 bytes, 0-999999 21 * 10 22 */ 23 24 /* # of bytes for year, month, and day. */ 25 #define _PyDateTime_DATE_DATASIZE 4 26 27 /* # of bytes for hour, minute, second, and usecond. */ 28 #define _PyDateTime_TIME_DATASIZE 6 29 30 /* # of bytes for year, month, day, hour, minute, second, and usecond. */ 31 #define _PyDateTime_DATETIME_DATASIZE 10 32 33 34 typedef struct 35 { 36 PyObject_HEAD 37 long hashcode; /* -1 when unknown */ 38 int days; /* -MAX_DELTA_DAYS <= days <= MAX_DELTA_DAYS */ 39 int seconds; /* 0 <= seconds < 24*3600 is invariant */ 40 int microseconds; /* 0 <= microseconds < 1000000 is invariant */ 41 } PyDateTime_Delta; 42 43 typedef struct 44 { 45 PyObject_HEAD /* a pure abstract base clase */ 46 } PyDateTime_TZInfo; 47 48 49 /* The datetime and time types have hashcodes, and an optional tzinfo member, 50 * present if and only if hastzinfo is true. 51 */ 52 #define _PyTZINFO_HEAD \ 53 PyObject_HEAD \ 54 long hashcode; \ 55 char hastzinfo; /* boolean flag */ 56 57 /* No _PyDateTime_BaseTZInfo is allocated; it's just to have something 58 * convenient to cast to, when getting at the hastzinfo member of objects 59 * starting with _PyTZINFO_HEAD. 60 */ 61 typedef struct 62 { 63 _PyTZINFO_HEAD 64 } _PyDateTime_BaseTZInfo; 65 66 /* All time objects are of PyDateTime_TimeType, but that can be allocated 67 * in two ways, with or without a tzinfo member. Without is the same as 68 * tzinfo == None, but consumes less memory. _PyDateTime_BaseTime is an 69 * internal struct used to allocate the right amount of space for the 70 * "without" case. 71 */ 72 #define _PyDateTime_TIMEHEAD \ 73 _PyTZINFO_HEAD \ 74 unsigned char data[_PyDateTime_TIME_DATASIZE]; 75 76 typedef struct 77 { 78 _PyDateTime_TIMEHEAD 79 } _PyDateTime_BaseTime; /* hastzinfo false */ 80 81 typedef struct 82 { 83 _PyDateTime_TIMEHEAD 84 PyObject *tzinfo; 85 } PyDateTime_Time; /* hastzinfo true */ 86 87 88 /* All datetime objects are of PyDateTime_DateTimeType, but that can be 89 * allocated in two ways too, just like for time objects above. In addition, 90 * the plain date type is a base class for datetime, so it must also have 91 * a hastzinfo member (although it's unused there). 92 */ 93 typedef struct 94 { 95 _PyTZINFO_HEAD 96 unsigned char data[_PyDateTime_DATE_DATASIZE]; 97 } PyDateTime_Date; 98 99 #define _PyDateTime_DATETIMEHEAD \ 100 _PyTZINFO_HEAD \ 101 unsigned char data[_PyDateTime_DATETIME_DATASIZE]; 102 103 typedef struct 104 { 105 _PyDateTime_DATETIMEHEAD 106 } _PyDateTime_BaseDateTime; /* hastzinfo false */ 107 108 typedef struct 109 { 110 _PyDateTime_DATETIMEHEAD 111 PyObject *tzinfo; 112 } PyDateTime_DateTime; /* hastzinfo true */ 113 114 115 /* Apply for date and datetime instances. */ 116 #define PyDateTime_GET_YEAR(o) ((((PyDateTime_Date*)o)->data[0] << 8) | \ 117 ((PyDateTime_Date*)o)->data[1]) 118 #define PyDateTime_GET_MONTH(o) (((PyDateTime_Date*)o)->data[2]) 119 #define PyDateTime_GET_DAY(o) (((PyDateTime_Date*)o)->data[3]) 120 121 #define PyDateTime_DATE_GET_HOUR(o) (((PyDateTime_DateTime*)o)->data[4]) 122 #define PyDateTime_DATE_GET_MINUTE(o) (((PyDateTime_DateTime*)o)->data[5]) 123 #define PyDateTime_DATE_GET_SECOND(o) (((PyDateTime_DateTime*)o)->data[6]) 124 #define PyDateTime_DATE_GET_MICROSECOND(o) \ 125 ((((PyDateTime_DateTime*)o)->data[7] << 16) | \ 126 (((PyDateTime_DateTime*)o)->data[8] << 8) | \ 127 ((PyDateTime_DateTime*)o)->data[9]) 128 129 /* Apply for time instances. */ 130 #define PyDateTime_TIME_GET_HOUR(o) (((PyDateTime_Time*)o)->data[0]) 131 #define PyDateTime_TIME_GET_MINUTE(o) (((PyDateTime_Time*)o)->data[1]) 132 #define PyDateTime_TIME_GET_SECOND(o) (((PyDateTime_Time*)o)->data[2]) 133 #define PyDateTime_TIME_GET_MICROSECOND(o) \ 134 ((((PyDateTime_Time*)o)->data[3] << 16) | \ 135 (((PyDateTime_Time*)o)->data[4] << 8) | \ 136 ((PyDateTime_Time*)o)->data[5]) 137 138 139 /* Define structure for C API. */ 140 typedef struct { 141 /* type objects */ 142 PyTypeObject *DateType; 143 PyTypeObject *DateTimeType; 144 PyTypeObject *TimeType; 145 PyTypeObject *DeltaType; 146 PyTypeObject *TZInfoType; 147 148 /* constructors */ 149 PyObject *(*Date_FromDate)(int, int, int, PyTypeObject*); 150 PyObject *(*DateTime_FromDateAndTime)(int, int, int, int, int, int, int, 151 PyObject*, PyTypeObject*); 152 PyObject *(*Time_FromTime)(int, int, int, int, PyObject*, PyTypeObject*); 153 PyObject *(*Delta_FromDelta)(int, int, int, int, PyTypeObject*); 154 155 /* constructors for the DB API */ 156 PyObject *(*DateTime_FromTimestamp)(PyObject*, PyObject*, PyObject*); 157 PyObject *(*Date_FromTimestamp)(PyObject*, PyObject*); 158 159 } PyDateTime_CAPI; 160 161 #define PyDateTime_CAPSULE_NAME "datetime.datetime_CAPI" 162 163 164 /* "magic" constant used to partially protect against developer mistakes. */ 165 #define DATETIME_API_MAGIC 0x414548d5 166 167 #ifdef Py_BUILD_CORE 168 169 /* Macros for type checking when building the Python core. */ 170 #define PyDate_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateType) 171 #define PyDate_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DateType) 172 173 #define PyDateTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateTimeType) 174 #define PyDateTime_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DateTimeType) 175 176 #define PyTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_TimeType) 177 #define PyTime_CheckExact(op) (Py_TYPE(op) == &PyDateTime_TimeType) 178 179 #define PyDelta_Check(op) PyObject_TypeCheck(op, &PyDateTime_DeltaType) 180 #define PyDelta_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DeltaType) 181 182 #define PyTZInfo_Check(op) PyObject_TypeCheck(op, &PyDateTime_TZInfoType) 183 #define PyTZInfo_CheckExact(op) (Py_TYPE(op) == &PyDateTime_TZInfoType) 184 185 #else 186 187 /* Define global variable for the C API and a macro for setting it. */ 188 static PyDateTime_CAPI *PyDateTimeAPI = NULL; 189 190 #define PyDateTime_IMPORT \ 191 PyDateTimeAPI = (PyDateTime_CAPI *)PyCapsule_Import(PyDateTime_CAPSULE_NAME, 0) 192 193 /* Macros for type checking when not building the Python core. */ 194 #define PyDate_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateType) 195 #define PyDate_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DateType) 196 197 #define PyDateTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateTimeType) 198 #define PyDateTime_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DateTimeType) 199 200 #define PyTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TimeType) 201 #define PyTime_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->TimeType) 202 203 #define PyDelta_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DeltaType) 204 #define PyDelta_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DeltaType) 205 206 #define PyTZInfo_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TZInfoType) 207 #define PyTZInfo_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->TZInfoType) 208 209 /* Macros for accessing constructors in a simplified fashion. */ 210 #define PyDate_FromDate(year, month, day) \ 211 PyDateTimeAPI->Date_FromDate(year, month, day, PyDateTimeAPI->DateType) 212 213 #define PyDateTime_FromDateAndTime(year, month, day, hour, min, sec, usec) \ 214 PyDateTimeAPI->DateTime_FromDateAndTime(year, month, day, hour, \ 215 min, sec, usec, Py_None, PyDateTimeAPI->DateTimeType) 216 217 #define PyTime_FromTime(hour, minute, second, usecond) \ 218 PyDateTimeAPI->Time_FromTime(hour, minute, second, usecond, \ 219 Py_None, PyDateTimeAPI->TimeType) 220 221 #define PyDelta_FromDSU(days, seconds, useconds) \ 222 PyDateTimeAPI->Delta_FromDelta(days, seconds, useconds, 1, \ 223 PyDateTimeAPI->DeltaType) 224 225 /* Macros supporting the DB API. */ 226 #define PyDateTime_FromTimestamp(args) \ 227 PyDateTimeAPI->DateTime_FromTimestamp( \ 228 (PyObject*) (PyDateTimeAPI->DateTimeType), args, NULL) 229 230 #define PyDate_FromTimestamp(args) \ 231 PyDateTimeAPI->Date_FromTimestamp( \ 232 (PyObject*) (PyDateTimeAPI->DateType), args) 233 234 #endif /* Py_BUILD_CORE */ 235 236 #ifdef __cplusplus 237 } 238 #endif 239 #endif 240
