52 lines
1.3 KiB
Cython
52 lines
1.3 KiB
Cython
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"""
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Cython implementation of (parts of) the standard library time module.
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"""
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from libc.stdint cimport int64_t
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from cpython.exc cimport PyErr_SetFromErrno
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cdef extern from "Python.h":
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ctypedef int64_t _PyTime_t
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_PyTime_t _PyTime_GetSystemClock() nogil
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double _PyTime_AsSecondsDouble(_PyTime_t t) nogil
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from libc.time cimport (
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tm,
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time_t,
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localtime as libc_localtime,
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)
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cdef inline double time() noexcept nogil:
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cdef:
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_PyTime_t tic
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tic = _PyTime_GetSystemClock()
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return _PyTime_AsSecondsDouble(tic)
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cdef inline int _raise_from_errno() except -1 with gil:
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PyErr_SetFromErrno(RuntimeError)
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return <int> -1 # Let the C compiler know that this function always raises.
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cdef inline tm localtime() except * nogil:
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"""
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Analogue to the stdlib time.localtime. The returned struct
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has some entries that the stdlib version does not: tm_gmtoff, tm_zone
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"""
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cdef:
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time_t tic = <time_t>time()
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tm* result
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result = libc_localtime(&tic)
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if result is NULL:
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_raise_from_errno()
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# Fix 0-based date values (and the 1900-based year).
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# See tmtotuple() in https://github.com/python/cpython/blob/master/Modules/timemodule.c
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result.tm_year += 1900
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result.tm_mon += 1
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result.tm_wday = (result.tm_wday + 6) % 7
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result.tm_yday += 1
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return result[0]
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