475 lines
13 KiB
Python
475 lines
13 KiB
Python
# cython.* namespace for pure mode.
|
|
from __future__ import absolute_import
|
|
|
|
__version__ = "0.29.33"
|
|
|
|
try:
|
|
from __builtin__ import basestring
|
|
except ImportError:
|
|
basestring = str
|
|
|
|
|
|
# BEGIN shameless copy from Cython/minivect/minitypes.py
|
|
|
|
class _ArrayType(object):
|
|
|
|
is_array = True
|
|
subtypes = ['dtype']
|
|
|
|
def __init__(self, dtype, ndim, is_c_contig=False, is_f_contig=False,
|
|
inner_contig=False, broadcasting=None):
|
|
self.dtype = dtype
|
|
self.ndim = ndim
|
|
self.is_c_contig = is_c_contig
|
|
self.is_f_contig = is_f_contig
|
|
self.inner_contig = inner_contig or is_c_contig or is_f_contig
|
|
self.broadcasting = broadcasting
|
|
|
|
def __repr__(self):
|
|
axes = [":"] * self.ndim
|
|
if self.is_c_contig:
|
|
axes[-1] = "::1"
|
|
elif self.is_f_contig:
|
|
axes[0] = "::1"
|
|
|
|
return "%s[%s]" % (self.dtype, ", ".join(axes))
|
|
|
|
|
|
def index_type(base_type, item):
|
|
"""
|
|
Support array type creation by slicing, e.g. double[:, :] specifies
|
|
a 2D strided array of doubles. The syntax is the same as for
|
|
Cython memoryviews.
|
|
"""
|
|
class InvalidTypeSpecification(Exception):
|
|
pass
|
|
|
|
def verify_slice(s):
|
|
if s.start or s.stop or s.step not in (None, 1):
|
|
raise InvalidTypeSpecification(
|
|
"Only a step of 1 may be provided to indicate C or "
|
|
"Fortran contiguity")
|
|
|
|
if isinstance(item, tuple):
|
|
step_idx = None
|
|
for idx, s in enumerate(item):
|
|
verify_slice(s)
|
|
if s.step and (step_idx or idx not in (0, len(item) - 1)):
|
|
raise InvalidTypeSpecification(
|
|
"Step may only be provided once, and only in the "
|
|
"first or last dimension.")
|
|
|
|
if s.step == 1:
|
|
step_idx = idx
|
|
|
|
return _ArrayType(base_type, len(item),
|
|
is_c_contig=step_idx == len(item) - 1,
|
|
is_f_contig=step_idx == 0)
|
|
elif isinstance(item, slice):
|
|
verify_slice(item)
|
|
return _ArrayType(base_type, 1, is_c_contig=bool(item.step))
|
|
else:
|
|
# int[8] etc.
|
|
assert int(item) == item # array size must be a plain integer
|
|
array(base_type, item)
|
|
|
|
# END shameless copy
|
|
|
|
|
|
compiled = False
|
|
|
|
_Unspecified = object()
|
|
|
|
# Function decorators
|
|
|
|
def _empty_decorator(x):
|
|
return x
|
|
|
|
def locals(**arg_types):
|
|
return _empty_decorator
|
|
|
|
def test_assert_path_exists(*paths):
|
|
return _empty_decorator
|
|
|
|
def test_fail_if_path_exists(*paths):
|
|
return _empty_decorator
|
|
|
|
class _EmptyDecoratorAndManager(object):
|
|
def __call__(self, x):
|
|
return x
|
|
def __enter__(self):
|
|
pass
|
|
def __exit__(self, exc_type, exc_value, traceback):
|
|
pass
|
|
|
|
class _Optimization(object):
|
|
pass
|
|
|
|
cclass = ccall = cfunc = _EmptyDecoratorAndManager()
|
|
|
|
returns = wraparound = boundscheck = initializedcheck = nonecheck = \
|
|
embedsignature = cdivision = cdivision_warnings = \
|
|
always_allows_keywords = profile = linetrace = infer_types = \
|
|
unraisable_tracebacks = freelist = \
|
|
lambda _: _EmptyDecoratorAndManager()
|
|
|
|
exceptval = lambda _=None, check=True: _EmptyDecoratorAndManager()
|
|
|
|
overflowcheck = lambda _: _EmptyDecoratorAndManager()
|
|
optimization = _Optimization()
|
|
|
|
overflowcheck.fold = optimization.use_switch = \
|
|
optimization.unpack_method_calls = lambda arg: _EmptyDecoratorAndManager()
|
|
|
|
final = internal = type_version_tag = no_gc_clear = no_gc = _empty_decorator
|
|
|
|
binding = lambda _: _empty_decorator
|
|
|
|
|
|
_cython_inline = None
|
|
def inline(f, *args, **kwds):
|
|
if isinstance(f, basestring):
|
|
global _cython_inline
|
|
if _cython_inline is None:
|
|
from Cython.Build.Inline import cython_inline as _cython_inline
|
|
return _cython_inline(f, *args, **kwds)
|
|
else:
|
|
assert len(args) == len(kwds) == 0
|
|
return f
|
|
|
|
|
|
def compile(f):
|
|
from Cython.Build.Inline import RuntimeCompiledFunction
|
|
return RuntimeCompiledFunction(f)
|
|
|
|
|
|
# Special functions
|
|
|
|
def cdiv(a, b):
|
|
q = a / b
|
|
if q < 0:
|
|
q += 1
|
|
return q
|
|
|
|
def cmod(a, b):
|
|
r = a % b
|
|
if (a*b) < 0:
|
|
r -= b
|
|
return r
|
|
|
|
|
|
# Emulated language constructs
|
|
|
|
def cast(type, *args, **kwargs):
|
|
kwargs.pop('typecheck', None)
|
|
assert not kwargs
|
|
if hasattr(type, '__call__'):
|
|
return type(*args)
|
|
else:
|
|
return args[0]
|
|
|
|
def sizeof(arg):
|
|
return 1
|
|
|
|
def typeof(arg):
|
|
return arg.__class__.__name__
|
|
# return type(arg)
|
|
|
|
def address(arg):
|
|
return pointer(type(arg))([arg])
|
|
|
|
def declare(type=None, value=_Unspecified, **kwds):
|
|
if type not in (None, object) and hasattr(type, '__call__'):
|
|
if value is not _Unspecified:
|
|
return type(value)
|
|
else:
|
|
return type()
|
|
else:
|
|
return value
|
|
|
|
class _nogil(object):
|
|
"""Support for 'with nogil' statement and @nogil decorator.
|
|
"""
|
|
def __call__(self, x):
|
|
if callable(x):
|
|
# Used as function decorator => return the function unchanged.
|
|
return x
|
|
# Used as conditional context manager or to create an "@nogil(True/False)" decorator => keep going.
|
|
return self
|
|
|
|
def __enter__(self):
|
|
pass
|
|
def __exit__(self, exc_class, exc, tb):
|
|
return exc_class is None
|
|
|
|
nogil = _nogil()
|
|
gil = _nogil()
|
|
del _nogil
|
|
|
|
|
|
# Emulated types
|
|
|
|
class CythonMetaType(type):
|
|
|
|
def __getitem__(type, ix):
|
|
return array(type, ix)
|
|
|
|
CythonTypeObject = CythonMetaType('CythonTypeObject', (object,), {})
|
|
|
|
class CythonType(CythonTypeObject):
|
|
|
|
def _pointer(self, n=1):
|
|
for i in range(n):
|
|
self = pointer(self)
|
|
return self
|
|
|
|
class PointerType(CythonType):
|
|
|
|
def __init__(self, value=None):
|
|
if isinstance(value, (ArrayType, PointerType)):
|
|
self._items = [cast(self._basetype, a) for a in value._items]
|
|
elif isinstance(value, list):
|
|
self._items = [cast(self._basetype, a) for a in value]
|
|
elif value is None or value == 0:
|
|
self._items = []
|
|
else:
|
|
raise ValueError
|
|
|
|
def __getitem__(self, ix):
|
|
if ix < 0:
|
|
raise IndexError("negative indexing not allowed in C")
|
|
return self._items[ix]
|
|
|
|
def __setitem__(self, ix, value):
|
|
if ix < 0:
|
|
raise IndexError("negative indexing not allowed in C")
|
|
self._items[ix] = cast(self._basetype, value)
|
|
|
|
def __eq__(self, value):
|
|
if value is None and not self._items:
|
|
return True
|
|
elif type(self) != type(value):
|
|
return False
|
|
else:
|
|
return not self._items and not value._items
|
|
|
|
def __repr__(self):
|
|
return "%s *" % (self._basetype,)
|
|
|
|
class ArrayType(PointerType):
|
|
|
|
def __init__(self):
|
|
self._items = [None] * self._n
|
|
|
|
|
|
class StructType(CythonType):
|
|
|
|
def __init__(self, cast_from=_Unspecified, **data):
|
|
if cast_from is not _Unspecified:
|
|
# do cast
|
|
if len(data) > 0:
|
|
raise ValueError('Cannot accept keyword arguments when casting.')
|
|
if type(cast_from) is not type(self):
|
|
raise ValueError('Cannot cast from %s'%cast_from)
|
|
for key, value in cast_from.__dict__.items():
|
|
setattr(self, key, value)
|
|
else:
|
|
for key, value in data.items():
|
|
setattr(self, key, value)
|
|
|
|
def __setattr__(self, key, value):
|
|
if key in self._members:
|
|
self.__dict__[key] = cast(self._members[key], value)
|
|
else:
|
|
raise AttributeError("Struct has no member '%s'" % key)
|
|
|
|
|
|
class UnionType(CythonType):
|
|
|
|
def __init__(self, cast_from=_Unspecified, **data):
|
|
if cast_from is not _Unspecified:
|
|
# do type cast
|
|
if len(data) > 0:
|
|
raise ValueError('Cannot accept keyword arguments when casting.')
|
|
if isinstance(cast_from, dict):
|
|
datadict = cast_from
|
|
elif type(cast_from) is type(self):
|
|
datadict = cast_from.__dict__
|
|
else:
|
|
raise ValueError('Cannot cast from %s'%cast_from)
|
|
else:
|
|
datadict = data
|
|
if len(datadict) > 1:
|
|
raise AttributeError("Union can only store one field at a time.")
|
|
for key, value in datadict.items():
|
|
setattr(self, key, value)
|
|
|
|
def __setattr__(self, key, value):
|
|
if key == '__dict__':
|
|
CythonType.__setattr__(self, key, value)
|
|
elif key in self._members:
|
|
self.__dict__ = {key: cast(self._members[key], value)}
|
|
else:
|
|
raise AttributeError("Union has no member '%s'" % key)
|
|
|
|
def pointer(basetype):
|
|
class PointerInstance(PointerType):
|
|
_basetype = basetype
|
|
return PointerInstance
|
|
|
|
def array(basetype, n):
|
|
class ArrayInstance(ArrayType):
|
|
_basetype = basetype
|
|
_n = n
|
|
return ArrayInstance
|
|
|
|
def struct(**members):
|
|
class StructInstance(StructType):
|
|
_members = members
|
|
for key in members:
|
|
setattr(StructInstance, key, None)
|
|
return StructInstance
|
|
|
|
def union(**members):
|
|
class UnionInstance(UnionType):
|
|
_members = members
|
|
for key in members:
|
|
setattr(UnionInstance, key, None)
|
|
return UnionInstance
|
|
|
|
class typedef(CythonType):
|
|
|
|
def __init__(self, type, name=None):
|
|
self._basetype = type
|
|
self.name = name
|
|
|
|
def __call__(self, *arg):
|
|
value = cast(self._basetype, *arg)
|
|
return value
|
|
|
|
def __repr__(self):
|
|
return self.name or str(self._basetype)
|
|
|
|
__getitem__ = index_type
|
|
|
|
class _FusedType(CythonType):
|
|
__getitem__ = index_type
|
|
|
|
|
|
def fused_type(*args):
|
|
if not args:
|
|
raise TypeError("Expected at least one type as argument")
|
|
|
|
# Find the numeric type with biggest rank if all types are numeric
|
|
rank = -1
|
|
for type in args:
|
|
if type not in (py_int, py_long, py_float, py_complex):
|
|
break
|
|
|
|
if type_ordering.index(type) > rank:
|
|
result_type = type
|
|
else:
|
|
return result_type
|
|
|
|
# Not a simple numeric type, return a fused type instance. The result
|
|
# isn't really meant to be used, as we can't keep track of the context in
|
|
# pure-mode. Casting won't do anything in this case.
|
|
return _FusedType()
|
|
|
|
|
|
def _specialized_from_args(signatures, args, kwargs):
|
|
"Perhaps this should be implemented in a TreeFragment in Cython code"
|
|
raise Exception("yet to be implemented")
|
|
|
|
|
|
py_int = typedef(int, "int")
|
|
try:
|
|
py_long = typedef(long, "long")
|
|
except NameError: # Py3
|
|
py_long = typedef(int, "long")
|
|
py_float = typedef(float, "float")
|
|
py_complex = typedef(complex, "double complex")
|
|
|
|
|
|
# Predefined types
|
|
|
|
int_types = ['char', 'short', 'Py_UNICODE', 'int', 'Py_UCS4', 'long', 'longlong', 'Py_ssize_t', 'size_t']
|
|
float_types = ['longdouble', 'double', 'float']
|
|
complex_types = ['longdoublecomplex', 'doublecomplex', 'floatcomplex', 'complex']
|
|
other_types = ['bint', 'void', 'Py_tss_t']
|
|
|
|
to_repr = {
|
|
'longlong': 'long long',
|
|
'longdouble': 'long double',
|
|
'longdoublecomplex': 'long double complex',
|
|
'doublecomplex': 'double complex',
|
|
'floatcomplex': 'float complex',
|
|
}.get
|
|
|
|
gs = globals()
|
|
|
|
# note: cannot simply name the unicode type here as 2to3 gets in the way and replaces it by str
|
|
try:
|
|
import __builtin__ as builtins
|
|
except ImportError: # Py3
|
|
import builtins
|
|
|
|
gs['unicode'] = typedef(getattr(builtins, 'unicode', str), 'unicode')
|
|
del builtins
|
|
|
|
for name in int_types:
|
|
reprname = to_repr(name, name)
|
|
gs[name] = typedef(py_int, reprname)
|
|
if name not in ('Py_UNICODE', 'Py_UCS4') and not name.endswith('size_t'):
|
|
gs['u'+name] = typedef(py_int, "unsigned " + reprname)
|
|
gs['s'+name] = typedef(py_int, "signed " + reprname)
|
|
|
|
for name in float_types:
|
|
gs[name] = typedef(py_float, to_repr(name, name))
|
|
|
|
for name in complex_types:
|
|
gs[name] = typedef(py_complex, to_repr(name, name))
|
|
|
|
bint = typedef(bool, "bint")
|
|
void = typedef(None, "void")
|
|
Py_tss_t = typedef(None, "Py_tss_t")
|
|
|
|
for t in int_types + float_types + complex_types + other_types:
|
|
for i in range(1, 4):
|
|
gs["%s_%s" % ('p'*i, t)] = gs[t]._pointer(i)
|
|
|
|
NULL = gs['p_void'](0)
|
|
|
|
# looks like 'gs' has some users out there by now...
|
|
#del gs
|
|
|
|
integral = floating = numeric = _FusedType()
|
|
|
|
type_ordering = [py_int, py_long, py_float, py_complex]
|
|
|
|
class CythonDotParallel(object):
|
|
"""
|
|
The cython.parallel module.
|
|
"""
|
|
|
|
__all__ = ['parallel', 'prange', 'threadid']
|
|
|
|
def parallel(self, num_threads=None):
|
|
return nogil
|
|
|
|
def prange(self, start=0, stop=None, step=1, nogil=False, schedule=None, chunksize=None, num_threads=None):
|
|
if stop is None:
|
|
stop = start
|
|
start = 0
|
|
return range(start, stop, step)
|
|
|
|
def threadid(self):
|
|
return 0
|
|
|
|
# def threadsavailable(self):
|
|
# return 1
|
|
|
|
import sys
|
|
sys.modules['cython.parallel'] = CythonDotParallel()
|
|
del sys
|