473 lines
13 KiB
Python
473 lines
13 KiB
Python
# cython.* namespace for pure mode.
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from __future__ import absolute_import
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__version__ = "0.29.14"
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try:
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from __builtin__ import basestring
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except ImportError:
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basestring = str
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# BEGIN shameless copy from Cython/minivect/minitypes.py
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class _ArrayType(object):
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is_array = True
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subtypes = ['dtype']
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def __init__(self, dtype, ndim, is_c_contig=False, is_f_contig=False,
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inner_contig=False, broadcasting=None):
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self.dtype = dtype
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self.ndim = ndim
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self.is_c_contig = is_c_contig
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self.is_f_contig = is_f_contig
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self.inner_contig = inner_contig or is_c_contig or is_f_contig
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self.broadcasting = broadcasting
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def __repr__(self):
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axes = [":"] * self.ndim
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if self.is_c_contig:
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axes[-1] = "::1"
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elif self.is_f_contig:
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axes[0] = "::1"
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return "%s[%s]" % (self.dtype, ", ".join(axes))
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def index_type(base_type, item):
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"""
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Support array type creation by slicing, e.g. double[:, :] specifies
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a 2D strided array of doubles. The syntax is the same as for
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Cython memoryviews.
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"""
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class InvalidTypeSpecification(Exception):
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pass
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def verify_slice(s):
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if s.start or s.stop or s.step not in (None, 1):
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raise InvalidTypeSpecification(
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"Only a step of 1 may be provided to indicate C or "
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"Fortran contiguity")
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if isinstance(item, tuple):
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step_idx = None
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for idx, s in enumerate(item):
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verify_slice(s)
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if s.step and (step_idx or idx not in (0, len(item) - 1)):
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raise InvalidTypeSpecification(
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"Step may only be provided once, and only in the "
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"first or last dimension.")
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if s.step == 1:
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step_idx = idx
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return _ArrayType(base_type, len(item),
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is_c_contig=step_idx == len(item) - 1,
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is_f_contig=step_idx == 0)
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elif isinstance(item, slice):
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verify_slice(item)
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return _ArrayType(base_type, 1, is_c_contig=bool(item.step))
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else:
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# int[8] etc.
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assert int(item) == item # array size must be a plain integer
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array(base_type, item)
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# END shameless copy
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compiled = False
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_Unspecified = object()
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# Function decorators
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def _empty_decorator(x):
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return x
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def locals(**arg_types):
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return _empty_decorator
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def test_assert_path_exists(*paths):
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return _empty_decorator
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def test_fail_if_path_exists(*paths):
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return _empty_decorator
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class _EmptyDecoratorAndManager(object):
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def __call__(self, x):
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return x
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def __enter__(self):
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pass
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def __exit__(self, exc_type, exc_value, traceback):
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pass
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class _Optimization(object):
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pass
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cclass = ccall = cfunc = _EmptyDecoratorAndManager()
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returns = wraparound = boundscheck = initializedcheck = nonecheck = \
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embedsignature = cdivision = cdivision_warnings = \
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always_allows_keywords = profile = linetrace = infer_types = \
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unraisable_tracebacks = freelist = \
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lambda _: _EmptyDecoratorAndManager()
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exceptval = lambda _=None, check=True: _EmptyDecoratorAndManager()
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overflowcheck = lambda _: _EmptyDecoratorAndManager()
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optimization = _Optimization()
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overflowcheck.fold = optimization.use_switch = \
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optimization.unpack_method_calls = lambda arg: _EmptyDecoratorAndManager()
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final = internal = type_version_tag = no_gc_clear = no_gc = _empty_decorator
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_cython_inline = None
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def inline(f, *args, **kwds):
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if isinstance(f, basestring):
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global _cython_inline
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if _cython_inline is None:
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from Cython.Build.Inline import cython_inline as _cython_inline
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return _cython_inline(f, *args, **kwds)
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else:
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assert len(args) == len(kwds) == 0
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return f
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def compile(f):
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from Cython.Build.Inline import RuntimeCompiledFunction
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return RuntimeCompiledFunction(f)
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# Special functions
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def cdiv(a, b):
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q = a / b
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if q < 0:
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q += 1
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return q
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def cmod(a, b):
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r = a % b
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if (a*b) < 0:
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r -= b
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return r
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# Emulated language constructs
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def cast(type, *args, **kwargs):
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kwargs.pop('typecheck', None)
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assert not kwargs
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if hasattr(type, '__call__'):
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return type(*args)
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else:
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return args[0]
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def sizeof(arg):
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return 1
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def typeof(arg):
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return arg.__class__.__name__
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# return type(arg)
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def address(arg):
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return pointer(type(arg))([arg])
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def declare(type=None, value=_Unspecified, **kwds):
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if type not in (None, object) and hasattr(type, '__call__'):
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if value is not _Unspecified:
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return type(value)
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else:
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return type()
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else:
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return value
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class _nogil(object):
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"""Support for 'with nogil' statement and @nogil decorator.
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"""
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def __call__(self, x):
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if callable(x):
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# Used as function decorator => return the function unchanged.
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return x
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# Used as conditional context manager or to create an "@nogil(True/False)" decorator => keep going.
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return self
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def __enter__(self):
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pass
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def __exit__(self, exc_class, exc, tb):
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return exc_class is None
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nogil = _nogil()
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gil = _nogil()
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del _nogil
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# Emulated types
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class CythonMetaType(type):
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def __getitem__(type, ix):
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return array(type, ix)
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CythonTypeObject = CythonMetaType('CythonTypeObject', (object,), {})
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class CythonType(CythonTypeObject):
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def _pointer(self, n=1):
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for i in range(n):
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self = pointer(self)
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return self
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class PointerType(CythonType):
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def __init__(self, value=None):
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if isinstance(value, (ArrayType, PointerType)):
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self._items = [cast(self._basetype, a) for a in value._items]
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elif isinstance(value, list):
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self._items = [cast(self._basetype, a) for a in value]
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elif value is None or value == 0:
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self._items = []
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else:
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raise ValueError
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def __getitem__(self, ix):
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if ix < 0:
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raise IndexError("negative indexing not allowed in C")
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return self._items[ix]
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def __setitem__(self, ix, value):
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if ix < 0:
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raise IndexError("negative indexing not allowed in C")
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self._items[ix] = cast(self._basetype, value)
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def __eq__(self, value):
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if value is None and not self._items:
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return True
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elif type(self) != type(value):
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return False
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else:
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return not self._items and not value._items
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def __repr__(self):
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return "%s *" % (self._basetype,)
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class ArrayType(PointerType):
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def __init__(self):
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self._items = [None] * self._n
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class StructType(CythonType):
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def __init__(self, cast_from=_Unspecified, **data):
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if cast_from is not _Unspecified:
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# do cast
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if len(data) > 0:
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raise ValueError('Cannot accept keyword arguments when casting.')
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if type(cast_from) is not type(self):
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raise ValueError('Cannot cast from %s'%cast_from)
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for key, value in cast_from.__dict__.items():
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setattr(self, key, value)
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else:
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for key, value in data.items():
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setattr(self, key, value)
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def __setattr__(self, key, value):
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if key in self._members:
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self.__dict__[key] = cast(self._members[key], value)
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else:
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raise AttributeError("Struct has no member '%s'" % key)
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class UnionType(CythonType):
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def __init__(self, cast_from=_Unspecified, **data):
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if cast_from is not _Unspecified:
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# do type cast
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if len(data) > 0:
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raise ValueError('Cannot accept keyword arguments when casting.')
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if isinstance(cast_from, dict):
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datadict = cast_from
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elif type(cast_from) is type(self):
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datadict = cast_from.__dict__
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else:
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raise ValueError('Cannot cast from %s'%cast_from)
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else:
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datadict = data
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if len(datadict) > 1:
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raise AttributeError("Union can only store one field at a time.")
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for key, value in datadict.items():
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setattr(self, key, value)
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def __setattr__(self, key, value):
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if key in '__dict__':
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CythonType.__setattr__(self, key, value)
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elif key in self._members:
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self.__dict__ = {key: cast(self._members[key], value)}
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else:
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raise AttributeError("Union has no member '%s'" % key)
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def pointer(basetype):
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class PointerInstance(PointerType):
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_basetype = basetype
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return PointerInstance
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def array(basetype, n):
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class ArrayInstance(ArrayType):
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_basetype = basetype
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_n = n
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return ArrayInstance
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def struct(**members):
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class StructInstance(StructType):
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_members = members
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for key in members:
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setattr(StructInstance, key, None)
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return StructInstance
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def union(**members):
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class UnionInstance(UnionType):
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_members = members
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for key in members:
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setattr(UnionInstance, key, None)
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return UnionInstance
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class typedef(CythonType):
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def __init__(self, type, name=None):
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self._basetype = type
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self.name = name
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def __call__(self, *arg):
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value = cast(self._basetype, *arg)
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return value
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def __repr__(self):
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return self.name or str(self._basetype)
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__getitem__ = index_type
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class _FusedType(CythonType):
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pass
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def fused_type(*args):
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if not args:
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raise TypeError("Expected at least one type as argument")
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# Find the numeric type with biggest rank if all types are numeric
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rank = -1
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for type in args:
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if type not in (py_int, py_long, py_float, py_complex):
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break
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if type_ordering.index(type) > rank:
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result_type = type
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else:
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return result_type
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# Not a simple numeric type, return a fused type instance. The result
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# isn't really meant to be used, as we can't keep track of the context in
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# pure-mode. Casting won't do anything in this case.
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return _FusedType()
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def _specialized_from_args(signatures, args, kwargs):
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"Perhaps this should be implemented in a TreeFragment in Cython code"
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raise Exception("yet to be implemented")
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py_int = typedef(int, "int")
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try:
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py_long = typedef(long, "long")
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except NameError: # Py3
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py_long = typedef(int, "long")
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py_float = typedef(float, "float")
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py_complex = typedef(complex, "double complex")
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# Predefined types
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int_types = ['char', 'short', 'Py_UNICODE', 'int', 'Py_UCS4', 'long', 'longlong', 'Py_ssize_t', 'size_t']
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float_types = ['longdouble', 'double', 'float']
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complex_types = ['longdoublecomplex', 'doublecomplex', 'floatcomplex', 'complex']
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other_types = ['bint', 'void', 'Py_tss_t']
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to_repr = {
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'longlong': 'long long',
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'longdouble': 'long double',
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'longdoublecomplex': 'long double complex',
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'doublecomplex': 'double complex',
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'floatcomplex': 'float complex',
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}.get
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gs = globals()
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# note: cannot simply name the unicode type here as 2to3 gets in the way and replaces it by str
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try:
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import __builtin__ as builtins
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except ImportError: # Py3
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import builtins
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gs['unicode'] = typedef(getattr(builtins, 'unicode', str), 'unicode')
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del builtins
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for name in int_types:
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reprname = to_repr(name, name)
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gs[name] = typedef(py_int, reprname)
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if name not in ('Py_UNICODE', 'Py_UCS4') and not name.endswith('size_t'):
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gs['u'+name] = typedef(py_int, "unsigned " + reprname)
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gs['s'+name] = typedef(py_int, "signed " + reprname)
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for name in float_types:
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gs[name] = typedef(py_float, to_repr(name, name))
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for name in complex_types:
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gs[name] = typedef(py_complex, to_repr(name, name))
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bint = typedef(bool, "bint")
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void = typedef(None, "void")
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Py_tss_t = typedef(None, "Py_tss_t")
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for t in int_types + float_types + complex_types + other_types:
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for i in range(1, 4):
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gs["%s_%s" % ('p'*i, t)] = gs[t]._pointer(i)
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NULL = gs['p_void'](0)
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# looks like 'gs' has some users out there by now...
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#del gs
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integral = floating = numeric = _FusedType()
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type_ordering = [py_int, py_long, py_float, py_complex]
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class CythonDotParallel(object):
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"""
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The cython.parallel module.
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"""
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__all__ = ['parallel', 'prange', 'threadid']
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def parallel(self, num_threads=None):
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return nogil
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def prange(self, start=0, stop=None, step=1, nogil=False, schedule=None, chunksize=None, num_threads=None):
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if stop is None:
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stop = start
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start = 0
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return range(start, stop, step)
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def threadid(self):
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return 0
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# def threadsavailable(self):
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# return 1
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import sys
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sys.modules['cython.parallel'] = CythonDotParallel()
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del sys
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