Source code for xdress.dtypes
"""Generates numpy dtypes for C/C++ classes and structs and other types.
This module is available as an xdress plugin by the name ``xdress.dtypes``.
:author: Anthony Scopatz <scopatz@gmail.com>
NumPy Dtypes Wrapper API
========================
"""
from __future__ import print_function
import os
import sys
import pprint
from .utils import newoverwrite, newcopyover, ensuredirs, indent, indentstr, \
RunControl, NotSpecified
from .plugins import Plugin
from .typesystem import TypeSystem
if sys.version_info[0] >= 3:
basestring = str
testvals = {
'char': ["m", "e", "t", "l"],
'str': ["Aha", "Take", "Me", "On"],
'int32': [1, 42, -65, 18],
'bool': [True, False, False, True],
'uint32': [1, 65, 4294967295, 42],
'float32': [1.0, 42.42, -65.5555, 18],
'float64': [1.0, 42.42, -65.5555, 18],
'complex128': [1.0, 42+42j, -65.55-1j, 0.18j],
}
for t, tval in list(testvals.items()):
testvals[t] = [tval, tval[::-1], tval[::2]*2, tval[1::2]*2]
_pyxdtype = """# {ctype} dtype
cdef MemoryKnight[{ctype}] mk_{fncname} = MemoryKnight[{ctype}]()
cdef MemoryKnight[PyXD{clsname}_Type] mk_{fncname}_type = MemoryKnight[PyXD{clsname}_Type]()
cdef object pyxd_{fncname}_getitem(void * data, void * arr):
{c2pydecl.indent4}
{c2pybody.indent4}
pyval = {c2pyrtn}
return pyval
cdef int pyxd_{fncname}_setitem(object value, void * data, void * arr):
cdef {ctype} * new_data
{py2cdecl.indent4}
if {isinst}:
{py2cbody.indent8}
new_data = mk_{fncname}.renew(data)
new_data[0] = {py2crtn}
return 0
else:
return -1
cdef void pyxd_{fncname}_copyswapn(void * dest, np.npy_intp dstride, void * src, np.npy_intp sstride, np.npy_intp n, int swap, void * arr):
cdef np.npy_intp i
cdef char * a
cdef char * b
cdef char c = 0
cdef int j
cdef int m
cdef {ctype} * new_dest
if src != NULL:
if (sstride == sizeof({ctype}) and dstride == sizeof({ctype})):
new_dest = mk_{fncname}.renew(dest)
new_dest[0] = deref(<{ctype} *> src)
else:
a = <char *> dest
b = <char *> src
for i in range(n):
new_dest = mk_{fncname}.renew(<void *> a)
new_dest[0] = deref(<{ctype} *> b)
a += dstride
b += sstride
if swap:
m = sizeof({ctype}) / 2
a = <char *> dest
for i in range(n, 0, -1):
b = a + (sizeof({ctype}) - 1);
for j in range(m):
c = a[0]
a[0] = b[0]
a += 1
b[0] = c
b -= 1
a += dstride - m
cdef void pyxd_{fncname}_copyswap(void * dest, void * src, int swap, void * arr):
cdef char * a
cdef char * b
cdef char c = 0
cdef int j
cdef int m
cdef {ctype} * new_dest
if src != NULL:
new_dest = mk_{fncname}.renew(dest)
new_dest[0] = (<{ctype} *> src)[0]
if swap:
m = sizeof({ctype}) / 2
a = <char *> dest
b = a + (sizeof({ctype}) - 1);
for j in range(m):
c = a[0]
a[0] = b[0]
a += 1
b[0] = c
b -= 1
cdef np.npy_bool pyxd_{fncname}_nonzero(void * data, void * arr):
return (data != NULL)
# FIXME comparisons not defined for arbitrary types
#cdef {ctype} zero = {ctype}()
#return ((<{ctype} *> data)[0] != zero)
cdef int pyxd_{fncname}_compare(const void * d1, const void * d2, void * arr):
return (d1 == d2) - 1
# FIXME comparisons not defined for arbitrary types
#if deref(<{ctype} *> d1) == deref(<{ctype} *> d2):
# return 0
#else:
# return -1
cdef PyArray_ArrFuncs PyXD_{clsname}_ArrFuncs
PyArray_InitArrFuncs(&PyXD_{clsname}_ArrFuncs)
PyXD_{clsname}_ArrFuncs.getitem = <PyArray_GetItemFunc *> (&pyxd_{fncname}_getitem)
PyXD_{clsname}_ArrFuncs.setitem = <PyArray_SetItemFunc *> (&pyxd_{fncname}_setitem)
PyXD_{clsname}_ArrFuncs.copyswapn = <PyArray_CopySwapNFunc *> (&pyxd_{fncname}_copyswapn)
PyXD_{clsname}_ArrFuncs.copyswap = <PyArray_CopySwapFunc *> (&pyxd_{fncname}_copyswap)
PyXD_{clsname}_ArrFuncs.nonzero = <PyArray_NonzeroFunc *> (&pyxd_{fncname}_nonzero)
PyXD_{clsname}_ArrFuncs.compare = <PyArray_CompareFunc *> (&pyxd_{fncname}_compare)
cdef object pyxd_{fncname}_type_alloc(PyTypeObject * self, Py_ssize_t nitems):
cdef PyXD{clsname}_Type * cval
cdef object pyval
cval = mk_{fncname}_type.defnew()
cval.ob_typ = self
pyval = <object> cval
return pyval
cdef void pyxd_{fncname}_type_dealloc(object self):
cdef PyXD{clsname}_Type * cself = <PyXD{clsname}_Type *> self
mk_{fncname}_type.deall(cself)
return
cdef object pyxd_{fncname}_type_new(PyTypeObject * subtype, object args, object kwds):
return pyxd_{fncname}_type_alloc(subtype, 0)
cdef void pyxd_{fncname}_type_free(void * self):
return
cdef object pyxd_{fncname}_type_str(object self):
cdef PyXD{clsname}_Type * cself = <PyXD{clsname}_Type *> self
{cself2pydecl.indent4}
{cself2pybody.indent4}
pyval = {cself2pyrtn}
s = str(pyval)
return s
cdef object pyxd_{fncname}_type_repr(object self):
cdef PyXD{clsname}_Type * cself = <PyXD{clsname}_Type *> self
{cself2pydecl.indent4}
{cself2pybody.indent4}
pyval = {cself2pyrtn}
s = repr(pyval)
return s
cdef int pyxd_{fncname}_type_compare(object a, object b):
return (a is b) - 1
# FIXME comparisons not defined for arbitrary types
#cdef PyXD{clsname}_Type * x
#cdef PyXD{clsname}_Type * y
#if type(a) is not type(b):
# raise NotImplementedError
#x = <PyXD{clsname}_Type *> a
#y = <PyXD{clsname}_Type *> b
#if (x.obval == y.obval):
# return 0
#elif (x.obval < y.obval):
# return -1
#elif (x.obval > y.obval):
# return 1
#else:
# raise NotImplementedError
cdef object pyxd_{fncname}_type_richcompare(object a, object b, int op):
if op == Py_EQ:
return (a is b)
elif op == Py_NE:
return (a is not b)
else:
return NotImplemented
# FIXME comparisons not defined for arbitrary types
#cdef PyXD{clsname}_Type * x
#cdef PyXD{clsname}_Type * y
#if type(a) is not type(b):
# return NotImplemented
#x = <PyXD{clsname}_Type *> a
#y = <PyXD{clsname}_Type *> b
#if op == Py_LT:
# return (x.obval < y.obval)
#elif op == Py_LE:
# return (x.obval <= y.obval)
#elif op == Py_EQ:
# return (x.obval == y.obval)
#elif op == Py_NE:
# return (x.obval != y.obval)
#elif op == Py_GT:
# return (x.obval > y.obval)
#elif op == Py_GE:
# return (x.obval >= y.obval)
#else:
# return NotImplemented
cdef long pyxd_{fncname}_type_hash(object self):
return id(self)
cdef PyMemberDef pyxd_{fncname}_type_members[1]
pyxd_{fncname}_type_members[0] = PyMemberDef(NULL, 0, 0, 0, NULL)
cdef PyGetSetDef pyxd_{fncname}_type_getset[1]
pyxd_{fncname}_type_getset[0] = PyGetSetDef(NULL)
cdef bint pyxd_{fncname}_is_ready
cdef type PyXD_{clsname} = type("xd_{fncname}", ((<object> PyArray_API[10]),), {{}})
pyxd_{fncname}_is_ready = PyType_Ready(<object> PyXD_{clsname})
(<PyTypeObject *> PyXD_{clsname}).tp_basicsize = sizeof(PyXD{clsname}_Type)
(<PyTypeObject *> PyXD_{clsname}).tp_itemsize = 0
(<PyTypeObject *> PyXD_{clsname}).tp_doc = "Python scalar type for {ctype}"
(<PyTypeObject *> PyXD_{clsname}).tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_CHECKTYPES | Py_TPFLAGS_HEAPTYPE
(<PyTypeObject *> PyXD_{clsname}).tp_alloc = pyxd_{fncname}_type_alloc
(<PyTypeObject *> PyXD_{clsname}).tp_dealloc = pyxd_{fncname}_type_dealloc
(<PyTypeObject *> PyXD_{clsname}).tp_new = pyxd_{fncname}_type_new
(<PyTypeObject *> PyXD_{clsname}).tp_free = pyxd_{fncname}_type_free
(<PyTypeObject *> PyXD_{clsname}).tp_str = pyxd_{fncname}_type_str
(<PyTypeObject *> PyXD_{clsname}).tp_repr = pyxd_{fncname}_type_repr
(<PyTypeObject *> PyXD_{clsname}).tp_base = (<PyTypeObject *> PyArray_API[10]) # PyGenericArrType_Type
(<PyTypeObject *> PyXD_{clsname}).tp_hash = pyxd_{fncname}_type_hash
emit_ifpy2k()
(<PyTypeObject *> PyXD_{clsname}).tp_compare = &pyxd_{fncname}_type_compare
emit_endif()
(<PyTypeObject *> PyXD_{clsname}).tp_richcompare = pyxd_{fncname}_type_richcompare
(<PyTypeObject *> PyXD_{clsname}).tp_members = pyxd_{fncname}_type_members
(<PyTypeObject *> PyXD_{clsname}).tp_getset = pyxd_{fncname}_type_getset
pyxd_{fncname}_is_ready = PyType_Ready(<object> PyXD_{clsname})
Py_INCREF(PyXD_{clsname})
XD{clsname} = PyXD_{clsname}
cdef PyArray_Descr * c_xd_{fncname}_descr = <PyArray_Descr *> malloc(sizeof(PyArray_Descr))
(<PyObject *> c_xd_{fncname}_descr).ob_refcnt = 0 # ob_refcnt
(<PyObject *> c_xd_{fncname}_descr).ob_type = <PyTypeObject *> PyArray_API[3]
c_xd_{fncname}_descr.typeobj = <PyTypeObject *> PyXD_{clsname} # typeobj
c_xd_{fncname}_descr.kind = 'x' # kind, for xdress
c_xd_{fncname}_descr.type = 'x' # type
c_xd_{fncname}_descr.byteorder = '=' # byteorder
c_xd_{fncname}_descr.flags = 0 # flags
c_xd_{fncname}_descr.type_num = 0 # type_num, assigned at registration
c_xd_{fncname}_descr.elsize = sizeof({ctype}) # elsize,
c_xd_{fncname}_descr.alignment = 8 # alignment
c_xd_{fncname}_descr.subarray = NULL # subarray
c_xd_{fncname}_descr.fields = NULL # fields
c_xd_{fncname}_descr.names = NULL
(<PyArray_Descr *> c_xd_{fncname}_descr).f = <PyArray_ArrFuncs *> &PyXD_{clsname}_ArrFuncs # f == PyArray_ArrFuncs
cdef object xd_{fncname}_descr = <object> (<void *> c_xd_{fncname}_descr)
Py_INCREF(<object> xd_{fncname}_descr)
xd_{fncname} = xd_{fncname}_descr
cdef int xd_{fncname}_num = PyArray_RegisterDataType(c_xd_{fncname}_descr)
dtypes['{fncname}'] = xd_{fncname}
dtypes['xd_{fncname}'] = xd_{fncname}
dtypes[xd_{fncname}_num] = xd_{fncname}
"""
[docs]def genpyx_dtype(t, ts):
"""Returns the pyx snippet for a dtype of type t."""
t = ts.canon(t)
kw = dict(clsname=ts.cython_classname(t)[1], humname=ts.humanname(t)[1],
fncname=ts.cython_functionname(t)[1],
ctype=ts.cython_ctype(t), pytype=ts.cython_pytype(t),
cytype=ts.cython_cytype(t), dtypes=ts.dtypes,
extra_types=ts.extra_types)
t0 = t
while not isinstance(t0, basestring):
t0 = t[0]
fpt = ts.from_pytypes[t0]
kw['isinst'] = " or ".join(["isinstance(value, {0})".format(x) for x in fpt])
c2pykeys = ['c2pydecl', 'c2pybody', 'c2pyrtn']
#c2py = ts.cython_c2py("deref(<{0} *> data)".format(kw['ctype']), t, cached=False,
# proxy_name="data_proxy")
c2py = ts.cython_c2py("(<{0} *> data)[0]".format(kw['ctype']), t, cached=False,
proxy_name="data_proxy")
#print(t)
#try:
# if isinstance(t, basestring) or t[-1] != 0:
# tptr = (t, '*')
# else:
# tptr = t[:-1] + ('*',)
# c2py = ts.cython_c2py("<{0} *> data".format(kw['ctype']), tptr, cached=False,
# proxy_name="data_proxy")
#except TypeError as e:
# import pdb; pdb.set_trace()
kw.update([(k, indentstr(v or '')) for k, v in zip(c2pykeys, c2py)])
cself2pykeys = ['cself2pydecl', 'cself2pybody', 'cself2pyrtn']
cself2py = ts.cython_c2py("(cself.obval)", t, cached=False, proxy_name="val_proxy")
kw.update([(k, indentstr(v or '')) for k, v in zip(cself2pykeys, cself2py)])
py2ckeys = ['py2cdecl', 'py2cbody', 'py2crtn']
py2c = ts.cython_py2c("value", t)
kw.update([(k, indentstr(v or '')) for k, v in zip(py2ckeys, py2c)])
return _pyxdtype.format(**kw)
_pxddtype = """# {ctype} dtype
ctypedef struct PyXD{clsname}_Type:
Py_ssize_t ob_refcnt
PyTypeObject *ob_typ
{ctype} obval
cdef object pyxd_{fncname}_getitem(void * data, void * arr)
cdef int pyxd_{fncname}_setitem(object value, void * data, void * arr)
cdef void pyxd_{fncname}_copyswapn(void * dest, np.npy_intp dstride, void * src, np.npy_intp sstride, np.npy_intp n, int swap, void * arr)
cdef void pyxd_{fncname}_copyswap(void * dest, void * src, int swap, void * arr)
cdef np.npy_bool pyxd_{fncname}_nonzero(void * data, void * arr)
"""
[docs]def genpxd_dtype(t, ts):
"""Returns the pxd snippet for a dtype of type t."""
t = ts.canon(t)
kw = dict(clsname=ts.cython_classname(t)[1], humname=ts.humanname(t)[1],
ctype=ts.cython_ctype(t), pytype=ts.cython_pytype(t),
fncname=ts.cython_functionname(t)[1],
cytype=ts.cython_cytype(t),)
return _pxddtype.format(**kw)
_testdtype = """# dtype{clsname}
def test_dtype_{fncname}():
a = np.array({0}, dtype={dtypes}.xd_{fncname})
#for x, y in zip(a, np.array({0}, dtype={dtypes}.xd_{fncname})):
# assert_equal(x, y)
a[:] = {1}
#for x, y in zip(a, np.array({1}, dtype={dtypes}.xd_{fncname})):
# assert_equal(x, y)
a = np.array({2} + {3}, dtype={dtypes}.xd_{fncname})
#for x, y in zip(a, np.array({2} + {3}, dtype={dtypes}.xd_{fncname})):
# assert_equal(x, y)
b = np.array(({2} + {3})[::2], dtype={dtypes}.xd_{fncname})
#for x, y in zip(a[::2], b):
# assert_equal(x, y)
a[:2] = b[-2:]
print(a)
"""
[docs]def gentest_dtype(t, ts):
"""Returns the test snippet for a set of type t."""
t = ts.canon(t)
if t in testvals:
s = _testdtype.format(*[repr(i) for i in testvals[t]],
clsname=ts.cython_classname(t)[1],
fncname=ts.cython_functionname(t)[1],
dtypes=ts.dtypes)
else:
s = ""
return s
#
# Controlers
#
_pyxheader = """###################
### WARNING!!! ###
###################
# This file has been autogenerated
# Cython imports
from cython.operator cimport dereference as deref
from cython.operator cimport preincrement as inc
from libc.stdlib cimport malloc, free
from libc.string cimport memcpy
from cpython.version cimport PY_MAJOR_VERSION
from cpython.ref cimport PyTypeObject
from cpython.type cimport PyType_Ready
from cpython.object cimport Py_LT, Py_LE, Py_EQ, Py_NE, Py_GT, Py_GE
# Python Imports
import collections
cimport numpy as np
import numpy as np
np.import_array()
cimport {extra_types}
# Cython imports for types
{cimports}
# imports for types
{imports}
dtypes = {{}}
if PY_MAJOR_VERSION >= 3:
basestring = str
# Dirty ifdef, else, else preprocessor hack
# see http://comments.gmane.org/gmane.comp.python.cython.user/4080
cdef extern from *:
cdef void emit_ifpy2k "#if PY_MAJOR_VERSION == 2 //" ()
cdef void emit_ifpy3k "#if PY_MAJOR_VERSION == 3 //" ()
cdef void emit_else "#else //" ()
cdef void emit_endif "#endif //" ()
"""
def genpyx(types, header=None, ts=None):
ts = ts or TypeSystem()
"""Returns a string of a pyx file representing the given types."""
pyx = _pyxheader if header is None else header
with ts.swap_dtypes(None):
import_tups = set()
cimport_tups = set()
for t in types:
ts.cython_import_tuples(t, import_tups)
ts.cython_cimport_tuples(t, cimport_tups)
imports = "\n".join(ts.cython_import_lines(import_tups))
cimports = "\n".join(ts.cython_cimport_lines(cimport_tups))
pyx = pyx.format(extra_types=ts.extra_types, cimports=cimports,
imports=imports)
for t in types:
pyx += genpyx_dtype(t, ts=ts) + "\n\n"
return pyx
_pxdheader = """###################
### WARNING!!! ###
###################
# This file has been autogenerated
# Cython imports
from cython.operator cimport dereference as deref
from cython.operator cimport preincrement as inc
from libc cimport stdio
from cpython.version cimport PY_MAJOR_VERSION
from cpython.ref cimport PyTypeObject, Py_INCREF, Py_XDECREF
from cpython.type cimport PyType_Ready
from cpython.object cimport PyObject
from cpython.object cimport Py_LT, Py_LE, Py_EQ, Py_NE, Py_GT, Py_GE
# Python imports
cimport numpy as np
# Local imports
cimport {extra_types}
# Cython imports for types
{cimports}
cdef extern from "Python.h":
ctypedef Py_ssize_t Py_ssize_t
cdef long Py_TPFLAGS_DEFAULT
cdef long Py_TPFLAGS_BASETYPE
cdef long Py_TPFLAGS_CHECKTYPES
cdef long Py_TPFLAGS_HEAPTYPE
ctypedef struct PyGetSetDef:
char * name
ctypedef struct PyTypeObject:
char * tp_name
int tp_basicsize
int tp_itemsize
object tp_alloc(PyTypeObject *, Py_ssize_t)
void tp_dealloc(object)
object tp_richcompare(object, object, int)
object tp_new(PyTypeObject *, object, object)
object tp_str(object)
object tp_repr(object)
long tp_hash(object)
long tp_flags
char * tp_doc
PyMemberDef * tp_members
PyGetSetDef * tp_getset
PyTypeObject * tp_base
void tp_free(void *)
# This is a dirty hack by declaring to Cython both the Python 2 & 3 APIs
int (*tp_compare)(object, object) # Python 2
void * (*tp_reserved)(object, object) # Python 3
# structmember.h isn't included in Python.h for some reason
cdef extern from "structmember.h":
ctypedef struct PyMemberDef:
char * name
int type
Py_ssize_t offset
int flags
char * doc
cdef extern from "numpy/arrayobject.h":
ctypedef object (*PyArray_GetItemFunc)(void *, void *)
ctypedef int (*PyArray_SetItemFunc)(object, void *, void *)
ctypedef void (*PyArray_CopySwapNFunc)(void *, np.npy_intp, void *, np.npy_intp, np.npy_intp, int, void *)
ctypedef void (*PyArray_CopySwapFunc)(void *, void *, int, void *)
ctypedef int (*PyArray_CompareFunc)(const void* d1, const void *, void *)
ctypedef int (*PyArray_ArgFunc)(void *, np.npy_intp, np.npy_intp *, void *)
ctypedef void (*PyArray_DotFunc)(void *, np.npy_intp, void *, np.npy_intp, void *, np.npy_intp, void *)
ctypedef int (*PyArray_ScanFunc)(stdio.FILE *, void *, void *, void *)
ctypedef int (*PyArray_FromStrFunc)(char *, void *, char **, void *)
ctypedef np.npy_bool (*PyArray_NonzeroFunc)(void *, void *)
ctypedef void (*PyArray_FillFunc)(void *, np.npy_intp, void *)
ctypedef void (*PyArray_FillWithScalarFunc)(void *, np.npy_intp, void *, void *)
ctypedef int (*PyArray_SortFunc)(void *, np.npy_intp, void *)
ctypedef int (*PyArray_ArgSortFunc)(void *, np.npy_intp *, np.npy_intp, void *)
ctypedef np.NPY_SCALARKIND (*PyArray_ScalarKindFunc)(np.PyArrayObject *)
ctypedef struct PyArray_ArrFuncs:
np.PyArray_VectorUnaryFunc ** cast
PyArray_GetItemFunc *getitem
PyArray_SetItemFunc *setitem
PyArray_CopySwapNFunc *copyswapn
PyArray_CopySwapFunc *copyswap
PyArray_CompareFunc *compare
PyArray_ArgFunc *argmax
PyArray_DotFunc *dotfunc
PyArray_ScanFunc *scanfunc
PyArray_FromStrFunc *fromstr
PyArray_NonzeroFunc *nonzero
PyArray_FillFunc *fill
PyArray_FillWithScalarFunc *fillwithscalar
PyArray_SortFunc *sort
PyArray_ArgSortFunc *argsort
PyObject *castdict
PyArray_ScalarKindFunc *scalarkind
int **cancastscalarkindto
int *cancastto
int listpickle
cdef void PyArray_InitArrFuncs(PyArray_ArrFuncs *)
ctypedef struct PyArray_ArrayDescr:
PyArray_Descr * base
PyObject *shape
cdef void ** PyArray_API
cdef PyTypeObject * PyArrayDescr_Type
ctypedef struct PyArray_Descr:
Py_ssize_t ob_refcnt
PyTypeObject * ob_type
PyTypeObject * typeobj
char kind
char type
char byteorder
int flags
int type_num
int elsize
int alignment
PyArray_ArrayDescr * subarray
PyObject * fields
PyObject * names
PyArray_ArrFuncs * f
cdef int PyArray_RegisterDataType(PyArray_Descr *)
cdef object PyArray_Scalar(void *, PyArray_Descr *, object)
cdef extern from "{extra_types}.h" namespace "{extra_types}":
cdef cppclass MemoryKnight[T]:
MemoryKnight() nogil except +
T * defnew() nogil except +
T * renew(void *) nogil except +
void deall(T *) nogil except +
"""
[docs]def genpxd(types, header=None, ts=None):
"""Returns a string of a pxd file representing the given dtypes."""
ts = ts or TypeSystem()
pxd = _pxdheader if header is None else header
with ts.swap_dtypes(None):
cimport_tups = set()
for t in types:
ts.cython_cimport_tuples(t, cimport_tups, set(['c']))
cimports = "\n".join(ts.cython_cimport_lines(cimport_tups))
pxd = pxd.format(extra_types=ts.extra_types, cimports=cimports)
for t in types:
pxd += genpxd_dtype(t, ts=ts) + "\n\n"
return pxd
_testheader = '''"""Tests the part of dtypes that is accessible from Python."""
###################
### WARNING!!! ###
###################
# This file has been autogenerated
from __future__ import print_function
import nose
from nose.tools import assert_equal, assert_not_equal, assert_raises, raises, \\
assert_almost_equal, assert_true, assert_false, assert_in
from numpy.testing import assert_array_equal, assert_array_almost_equal
import os
import numpy as np
from {package} import {dtypes}
'''
_testfooter = '''if __name__ == '__main__':
nose.run()
'''
[docs]def gentest(types, header=None, package='..', ts=None):
"""Returns a string of a test file representing the given types."""
ts = ts or TypeSystem()
test = _testheader if header is None else header
test = test.format(dtypes=ts.dtypes, package=package)
for t in types:
test += gentest_dtype(t, ts=ts) + "\n\n"
test += _testfooter
return test
[docs]def genfiles(types, fname='dtypes', pxdname=None, testname=None,
pyxheader=None, pxdheader=None, testheader=None, package='..',
ts=None, verbose=False):
"""Generates all cython source files needed to create the numpy dtype wrapper."""
ts = ts or TypeSystem()
# munge some filenames
fname = fname[:-4] if fname.endswith('.pyx') else fname
pxdname = fname if pxdname is None else pxdname
pxdname = pxdname + '.pxd' if not pxdname.endswith('.pxd') else pxdname
testname = 'test_' + fname if testname is None else testname
testname = testname + '.py' if not testname.endswith('.py') else testname
fname += '.pyx'
# register dtypes
for t in types:
ts.register_numpy_dtype(t)
pyx = genpyx(types, pyxheader, ts=ts)
pxd = genpxd(types, pxdheader, ts=ts)
test = gentest(types, testheader, package, ts=ts)
newoverwrite(pyx, fname, verbose)
newoverwrite(pxd, pxdname, verbose)
newoverwrite(test, testname, verbose)
#
# XDress Plugin
#
[docs]class XDressPlugin(Plugin):
"""This class provides numpy dtype functionality for xdress."""
requires = ('xdress.base', 'xdress.extratypes')
defaultrc = RunControl(
dtypes=[],
make_dtypes=True,
)
rcdocs = {
"dtypes": "List of types to create numpy dtypes for.",
"make_dtypes": ("Flag for enabling / disabling the generation of "
"numpy dtype wrappers."),
}
def update_argparser(self, parser):
parser.add_argument('--make-dtypes', action='store_true',
dest='make_dtypes', help="make numpy dtype wrappers")
parser.add_argument('--no-make-dtypes', action='store_false',
dest='make_dtypes', help="don't make numpy dtype wrappers")
def setup(self, rc):
print("dtypes: registering numpy dtypes")
ts = rc.ts
# register dtypes
for t in rc.dtypes:
ts.register_numpy_dtype(t)
def execute(self, rc):
if not rc.make_dtypes:
return
print("dtypes: generating numpy dtype wrappers")
fname = os.path.join(rc.packagedir, rc.dtypes_module)
ensuredirs(fname)
testname = 'test_' + rc.dtypes_module
testname = os.path.join(rc.packagedir, 'tests', testname)
ensuredirs(testname)
genfiles(rc.dtypes, fname=fname, testname=testname, package=rc.package,
ts=rc.ts, verbose=rc.verbose)
