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Copy pathpython_cext.py
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1159 lines (853 loc) · 29 KB
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# Copyright (c) 2018, Oracle and/or its affiliates.
#
# The Universal Permissive License (UPL), Version 1.0
#
# Subject to the condition set forth below, permission is hereby granted to any
# person obtaining a copy of this software, associated documentation and/or data
# (collectively the "Software"), free of charge and under any and all copyright
# rights in the Software, and any and all patent rights owned or freely
# licensable by each licensor hereunder covering either (i) the unmodified
# Software as contributed to or provided by such licensor, or (ii) the Larger
# Works (as defined below), to deal in both
#
# (a) the Software, and
# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
# one is included with the Software (each a "Larger Work" to which the
# Software is contributed by such licensors),
#
# without restriction, including without limitation the rights to copy, create
# derivative works of, display, perform, and distribute the Software and make,
# use, sell, offer for sale, import, export, have made, and have sold the
# Software and the Larger Work(s), and to sublicense the foregoing rights on
# either these or other terms.
#
# This license is subject to the following condition:
#
# The above copyright notice and either this complete permission notice or at a
# minimum a reference to the UPL must be included in all copies or substantial
# portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import _imp
import sys
class CErrorHandler(object):
def __enter__(self, *args):
pass
def __exit__(self, typ, val, tb):
if typ != None:
PyErr_Restore(typ, val, tb)
return True
error_handler = CErrorHandler()
def may_raise(error_result=error_handler):
if isinstance(error_result, type(may_raise)):
# direct annotation
return may_raise(error_handler)(error_result)
else:
def decorator(fun):
def wrapper(*args):
with error_handler:
return fun(*args)
return error_result
wrapper.__name__ = fun.__name__
return wrapper
return decorator
def Py_True():
return True
def Py_False():
return False
def Py_Ellipsis():
return ...
moduletype = type(sys)
def _PyModule_CreateInitialized_PyModule_New(name):
# see CPython's Objects/moduleobject.c - _PyModule_CreateInitialized for
# comparison how they handle _Py_PackageContext
if _imp._py_package_context:
if _imp._py_package_context.endswith(name):
name = _imp._py_package_context
_imp._py_package_context = None
return moduletype(name)
def PyModule_SetDocString(module, string):
module.__doc__ = string
##################### DICT
def PyDict_New():
return {}
def PyDict_Next(dictObj, pos):
if isinstance(dictObj, dict):
curPos = 0
max = len(dictObj)
if pos >= max:
return error_handler
for key in dictObj:
if curPos == pos:
return key, dictObj[key]
curPos = curPos + 1
return error_handler
@may_raise(-1)
def PyDict_Size(dictObj):
if not isinstance(dictObj, dict):
raise TypeError('expected dict, {!s} found'.format(type(dictObj)))
return len(dictObj)
@may_raise(None)
def PyDict_Copy(dictObj):
if not isinstance(dictObj, dict):
_PyErr_BadInternalCall(None, None, dictObj)
return dictObj.copy()
@may_raise
def PyDict_GetItem(dictObj, key):
if not isinstance(dictObj, dict):
raise TypeError('expected dict, {!s} found'.format(type(dictObj)))
return dictObj.get(key, error_handler)
@may_raise(-1)
def PyDict_SetItem(dictObj, key, value):
if not isinstance(dictObj, dict):
raise TypeError('expected dict, {!s} found'.format(type(dictObj)))
dictObj[key] = value
return 0
@may_raise(-1)
def PyDict_DelItem(dictObj, key):
if not isinstance(dictObj, dict):
raise TypeError('expected dict, {!s} found'.format(type(dictObj)))
del dictObj[key]
return 0
##################### SET, FROZENSET
@may_raise
def PySet_New(iterable):
if iterable:
return set(iterable)
else:
return set()
@may_raise
def PyFrozenSet_New(iterable):
if iterable:
return frozenset(iterable)
else:
return frozenset()
##################### MAPPINGPROXY
def PyDictProxy_New(mapping):
mappingproxy = type(type.__dict__)
return mappingproxy(mapping)
def Py_DECREF(obj):
pass
def Py_INCREF(obj):
pass
def Py_XINCREF(obj):
pass
def PyObject_LEN(obj):
return len(obj)
def PyTruffle_Object_LEN(obj):
return len(to_java(obj))
##################### BYTES
def PyBytes_FromStringAndSize(string, encoding):
if string is not None:
return bytes(string, encoding)
return bytes()
def PyBytes_AsStringCheckEmbeddedNull(obj, encoding):
if not PyBytes_Check(obj):
raise TypeError('expected bytes, {!s} found'.format(type(obj)))
result = obj.decode(encoding)
for ch in obj:
if ch == 0:
raise ValueError('embedded null byte')
return result
def PyBytes_Size(obj):
return PyObject_Size(obj)
def PyBytes_Check(obj):
return isinstance(obj, bytes)
@may_raise
def PyBytes_Concat(original, newpart):
return original + newpart
def PyBytes_FromFormat(fmt, args):
formatted = fmt % args
return formatted.encode()
##################### LIST
@may_raise
def PyList_New(size):
if size < 0:
_PyErr_BadInternalCall(None, None, None)
return [None] * size
@may_raise
def PyList_GetItem(listObj, pos):
if not isinstance(listObj, list):
_PyErr_BadInternalCall(None, None, listObj)
if pos < 0:
raise IndexError("list index out of range")
return listObj[pos]
@may_raise(-1)
def PyList_SetItem(listObj, pos, newitem):
if not isinstance(listObj, list):
_PyErr_BadInternalCall(None, None, listObj)
if pos < 0:
raise IndexError("list assignment index out of range")
listObj[pos] = newitem
return 0
@may_raise(-1)
def PyList_Append(listObj, newitem):
if not isinstance(listObj, list):
_PyErr_BadInternalCall(None, None, listObj)
listObj.append(newitem)
return 0
@may_raise
def PyList_AsTuple(listObj):
if not isinstance(listObj, list):
raise SystemError("expected list type")
return tuple(listObj)
@may_raise
def PyList_GetSlice(listObj, ilow, ihigh):
if not isinstance(listObj, list):
_PyErr_BadInternalCall(None, None, listObj)
return listObj[ilow:ihigh]
@may_raise(-1)
def PyList_Size(listObj):
if not isinstance(listObj, list):
_PyErr_BadInternalCall(None, None, listObj)
return len(listObj)
##################### LONG
@may_raise
def PyLong_FromLongLong(n, signed):
if signed:
return int(n)
else:
return int(n & 0xffffffffffffffff)
@may_raise(-1)
def PyLong_AsPrimitive(n, signed, size, descr):
if isinstance(n, int):
return TrufflePInt_AsPrimitive(n, signed, size, descr)
else:
return TrufflePInt_AsPrimitive(int(n), signed, size, descr)
def _PyLong_Sign(n):
if n==0:
return 0
elif n < 0:
return -1
else:
return 1
##################### FLOAT
@may_raise
def PyFloat_FromDouble(n):
return float(n)
@may_raise(-1.0)
def PyFloat_AsPrimitive(n):
if isinstance(n, float):
return TrufflePFloat_AsPrimitive(n)
else:
return TrufflePFloat_AsPrimitive(float(n))
##################### NUMBER
def _safe_check(v, type_check):
try:
return type_check(v)
except:
return False
def PyNumber_Check(v):
return _safe_check(v, lambda x: isinstance(int(x), int)) or _safe_check(v, lambda x: isinstance(float(x), float))
@may_raise
def PyNumber_BinOp(v, w, binop, name):
if binop == 0:
return v + w
elif binop == 1:
return v - w
elif binop == 2:
return v * w
elif binop == 3:
return v / w
elif binop == 4:
return v << w
elif binop == 5:
return v >> w
elif binop == 6:
return v | w
elif binop == 7:
return v & w
elif binop == 8:
return v ^ w
elif binop == 9:
return v // w
elif binop == 10:
return v % w
else:
raise SystemError("unknown binary operator %s" % name)
@may_raise
def PyNumber_UnaryOp(v, unaryop, name):
if unaryop == 0:
return +v
elif unaryop == 1:
return -v
elif unaryop == 2:
return ~v
else:
raise SystemError("unknown unary operator %s" % name)
@may_raise
def PyNumber_Index(v):
if not hasattr(v, "__index__"):
raise TypeError("'%s' object cannot be interpreted as an integer" % type(v))
result = v.__index__()
result_type = type(result)
if not isinstance(result, int):
raise TypeError("__index__ returned non-int (type %s)" % result_type)
if result_type is not int:
from warnings import warn
warn("__index__ returned non-int (type %s). The ability to return an instance of a strict subclass of int "
"is deprecated, and may be removed in a future version of Python." % result_type)
return result
@may_raise
def PyNumber_Float(v):
return float(v)
@may_raise
def PyNumber_Long(v):
return int(v)
@may_raise
def PyNumber_Absolute(v):
return abs(v)
@may_raise
def PyNumber_Divmod(a, b):
return divmod(a, b)
@may_raise
def PyIter_Next(itObj):
return next(itObj)
##################### SEQUENCE
@may_raise
def PySequence_Tuple(obj):
return tuple(obj)
@may_raise
def PySequence_Fast(obj, msg):
if isinstance(obj, tuple) or isinstance(obj, list):
return obj
try:
return list(obj)
except TypeError:
raise TypeError(msg)
def PySequence_Check(obj):
# dictionaries are explicitly excluded
if isinstance(obj, dict):
return False
return hasattr(obj, '__getitem__')
@may_raise
def PySequence_GetItem(obj, key):
if not hasattr(obj, '__getitem__'):
raise TypeError("'%s' object does not support indexing)" % repr(obj))
if len(obj) < 0:
return error_marker
return obj[key]
@may_raise(-1)
def PySequence_SetItem(obj, key, value):
if not hasattr(obj, '__setitem__'):
raise TypeError("'%s' object does not support item assignment)" % repr(obj))
if len(obj) < 0:
return -1
obj.__setitem__(key, value)
return 0
##################### UNICODE
@may_raise
def PyUnicode_FromObject(o):
if not isinstance(o, str):
raise TypeError("Can't convert '%s' object to str implicitly" % type(o).__name__)
return str(o)
@may_raise(-1)
def PyUnicode_GetLength(o):
if not isinstance(o, str):
raise TypeError("bad argument type for built-in operation");
return len(o)
@may_raise
def PyUnicode_Concat(left, right):
if not isinstance(left, str):
raise TypeError("must be str, not %s" % type(left));
if not isinstance(right, str):
raise TypeError("must be str, not %s" % type(right));
return left + right
@may_raise
def PyUnicode_FromEncodedObject(obj, encoding, errors):
if isinstance(obj, bytes):
return obj.decode(encoding, errors)
if isinstance(obj, str):
raise TypeError("decoding str is not supported")
def PyUnicode_InternInPlace(s):
return sys.intern(s)
@may_raise
def PyUnicode_Format(format, args):
if not isinstance(format, str):
raise TypeError("Must be str, not %s" % type(format).__name__)
return format % args
##################### CAPSULE
class PyCapsule:
name = None
pointer = None
context = None
def __init__(self, name, pointer, destructor):
self.name = name
self.pointer = pointer
def __repr__(self):
name = "NULL" if self.name is None else self.name
quote = "" if self.name is None else '"'
return "<capsule object %s%s%s at %p>" % (quote, name, quote, self.pointer)
@may_raise
def PyCapsule_GetContext(obj):
if not isinstance(obj, PyCapsule) or obj.pointer is None:
raise ValueError("PyCapsule_GetContext called with invalid PyCapsule object")
return obj.context
@may_raise
def PyCapsule_GetPointer(obj, name):
if not isinstance(obj, PyCapsule) or obj.pointer is None:
raise ValueError("PyCapsule_GetPointer called with invalid PyCapsule object")
if name != None and name != obj.name:
raise ValueError("PyCapsule_GetPointer called with incorrect name")
return obj.pointer
@may_raise
def PyCapsule_Import(name, no_block):
obj = None
mod = name.split(".")[0]
try:
obj = __import__(mod)
except:
raise ImportError('PyCapsule_Import could not import module "%s"' % name)
for attr in name.split(".")[1:]:
obj = getattr(obj, attr)
if PyCapsule_IsValid(obj, name):
return obj.pointer
else:
raise AttributeError('PyCapsule_Import "%s" is not valid' % name)
def PyCapsule_IsValid(obj, name):
return (isinstance(obj, PyCapsule) and
obj.pointer != None and
obj.name == name)
def PyModule_AddObject(m, k, v):
m.__dict__[k] = v
return None
def PyStructSequence_New(typ):
from posix import stat_result
return stat_result([None] * stat_result.n_sequence_fields * 2)
def METH_KEYWORDS(fun):
def wrapped(self, *args, **kwds):
return fun(self, args, kwds)
return wrapped
def METH_VARARGS(fun):
def wrapped(self, *args):
return fun(self, args)
return wrapped
def METH_NOARGS(fun):
def wrapped(self):
return fun(self, None)
return wrapped
def METH_O(fun):
def wrapped(self, arg):
return fun(self, (arg,));
return wrapped
def METH_FASTCALL(fun):
def wrapped(self, *args, **kwargs):
return fun(self, args, len(args), kwargs)
return wrapped
def METH_UNSUPPORTED(fun):
raise NotImplementedError("unsupported message type")
def METH_DIRECT(fun):
def wrapped(*args, **kwargs):
return fun(*args, **kwargs)
return wrapped
methodtype = classmethod.method
class modulemethod(methodtype):
def __new__(cls, mod, func):
return super().__new__(cls, mod, func)
class cstaticmethod():
def __init__(self, func):
self.__func__ = func
def __get__(self, instance, owner=None):
return methodtype(None, self.__func__)
def __call__(*args, **kwargs):
return self.__func__(None, *args, **kwargs)
def AddFunction(primary, name, cfunc, cwrapper, wrapper, doc, isclass=False, isstatic=False):
func = wrapper(CreateFunction(name, cfunc, cwrapper))
if isclass:
func = classmethod(func)
elif isstatic:
func = cstaticmethod(func)
elif isinstance(primary, moduletype):
func = modulemethod(primary, func)
func.__name__ = name
func.__doc__ = doc
if name == "__init__":
def __init__(self, *args, **kwargs):
if func(self, *args, **kwargs) != 0:
raise TypeError("__init__ failed")
object.__setattr__(primary, name, __init__)
else:
object.__setattr__(primary, name, func)
def AddMember(primary, name, memberType, offset, canSet, doc):
member = property()
getter = ReadMemberFunctions[memberType]
def member_getter(self):
return getter(self, offset)
member.getter(member_getter)
if canSet:
setter = WriteMemberFunctions[memberType]
def member_setter(self, value):
setter(self, offset, value)
member.setter(member_setter)
member.__doc__ = doc
object.__setattr__(primary, name, member)
def AddGetSet(primary, name, getter, getter_wrapper, setter, setter_wrapper, doc, closure):
getset = property()
if getter:
getter_w = CreateFunction(name, getter, getter_wrapper)
def member_getter(self):
return capi_to_java(getter_w(self, closure))
getset.getter(member_getter)
if setter:
setter_w = CreateFunction(name, setter, setter_wrapper)
def member_setter(self, value):
result = setter_w(self, value, closure)
if result != 0:
raise
return None
getset.setter(member_setter)
else:
getset.setter(lambda self, value: GetSet_SetNotWritable(self, value, name))
getset.__doc__ = doc
object.__setattr__(primary, name, getset)
def GetSet_SetNotWritable(self, value, attr):
raise AttributeError("attribute '%s' of '%s' objects is not writable" % (attr, type(self).__name__))
def PyObject_Str(o):
return str(o)
def PyObject_Repr(o):
return repr(o)
def PyType_IsSubtype(a, b):
return 1 if b in a.mro() else 0
@may_raise
def PyTruffle_Add_Subclass(bases_dict, key, cls):
if not bases_dict:
bases_dict = dict()
bases_dict[key] = cls
return bases_dict
def PyTuple_New(size):
return (None,) * size
@may_raise
def PyTuple_GetItem(t, n):
if not isinstance(t, tuple):
_PyErr_BadInternalCall(None, None, t)
return t[n]
@may_raise(-1)
def PyTuple_Size(t):
if not isinstance(t, tuple):
_PyErr_BadInternalCall(None, None, t)
return len(t)
@may_raise
def PyTuple_GetSlice(t, start, end):
if not isinstance(t, tuple):
_PyErr_BadInternalCall(None, None, t)
return t[start:end]
@may_raise
def dict_from_list(lst):
if len(lst) % 2 != 0:
raise SystemError("list cannot be converted to dict")
d = {}
for i in range(0, len(lst), 2):
d[l[i]] = d[l[i + 1]]
return d
def PyObject_Size(obj):
try:
return int(len(obj))
except Exception:
return -1
def PyObject_Call(callee, args, kwargs):
return callee(*args, **kwargs)
def PyObject_CallMethod(rcvr, method, args):
return getattr(rcvr, method)(*args)
@may_raise
def PyObject_GetItem(obj, key):
return obj[key]
@may_raise(1)
def PyObject_SetItem(obj, key, value):
obj[key] = value
return 0
def PyObject_IsInstance(obj, typ):
if isinstance(obj, typ):
return 1
else:
return 0
@may_raise
def PyObject_RichCompare(left, right, op):
left.__truffle_richcompare__(right, op)
def PyObject_AsFileDescriptor(obj):
if isinstance(obj, int):
result = obj
elif hasattr(obj, "fileno"):
result = obj.fileno()
if not isinstance(result, int):
raise TypeError("fileno() returned a non-integer")
else:
raise TypeError("argument must be an int, or have a fileno() method")
if result < 0:
raise ValueError("file descriptor cannot be a negative integer (%d)" % result)
return int(result)
@may_raise
def PyObject_GetAttr(obj, attr):
return getattr(obj, attr)
@may_raise(-1)
def PyObject_SetAttr(obj, attr, value):
setattr(obj, attr, value)
return 0
def PyObject_HasAttr(obj, attr):
return 1 if hasattr(obj, attr) else 0
def PyObject_HashNotImplemented(obj):
return TypeError("unhashable type: '%s'" % type(obj).__name__)
def PyObject_IsTrue(obj):
return 1 if obj else 0
## EXCEPTIONS
@may_raise(None)
def PyErr_CreateAndSetException(exception_type, msg):
if not _is_exception_class(exception_type):
raise SystemError("exception %r not a BaseException subclass" % exception_type)
if msg is None:
raise exception_type()
else:
raise exception_type(msg)
@may_raise(None)
def _PyErr_BadInternalCall(filename, lineno, obj):
if filename is not None and lineno is not None:
msg = "{!s}:{!s}: bad argument to internal function".format(filename, lineno)
else:
msg = "bad argument to internal function, was '{!s}' (type '{!s}')".format(obj, type(obj))
raise SystemError(msg)
def PyErr_NewException(name, base, dictionary):
if "__module__" not in dictionary:
dictionary["__module__"] = name.rpartition(".")[2]
if not isinstance(base, tuple):
bases = (base,)
else:
bases = base
return type(name, bases, dictionary)
def PyErr_Format(err_type, format_str, args):
PyErr_CreateAndSetException(err_type, format_str % args)
def PyErr_Fetch(consume, default):
res = sys.exc_info()
if res != (None, None, None):
# fetch 'consumes' the exception
if consume:
PyErr_Restore(None, None, None)
return res
return default
def PyErr_PrintEx(set_sys_last_vars):
typ, val, tb = sys.exc_info()
if PyErr_GivenExceptionMatches(PyErr_Occurred(), SystemExit):
_handle_system_exit()
typ, val, tb = PyErr_Fetch(True, (None, None, None))
if typ is None:
return
if set_sys_last_vars:
try:
sys.last_type = typ
sys.last_value = val
sys.last_traceback = tb
except BaseException:
PyErr_Restore(None, None, None)
if hasattr(sys, "excepthook"):
try:
sys.excepthook(typ, val, tb)
except BaseException as e:
typ1, val1, tb1 = sys.exc_info()
# not quite the same as 'PySys_WriteStderr' but close
sys.__stderr__.write("Error in sys.excepthook:\n")
PyErr_Display(typ1, val1, tb1);
sys.__stderr__.write("\nOriginal exception was:\n");
PyErr_Display(typ, val, tb);
def _handle_system_exit():
typ, val, tb = sys.exc_info()
rc = 0
return_object = None
if val is not None and hasattr(val, "code"):
return_object = val.code
if isinstance(val.code, int):
rc = return_object
else:
PyErr_Restore(None, None, None)
if sys.stderr:
PyFile_WriteObject(return_object, sys.stderr, 1)
else:
# TODO should print to native 'stderr'
print(return_object)
import os
os._exit(rc)
def PyErr_WriteUnraisable(obj):
typ, val, tb = PyErr_Fetch(True, (None, None, None))
try:
if sys.stderr is None:
return
if obj:
obj_str_arg = None
try:
obj_str_arg = repr(obj)
except:
obj_str_arg = "<object repr() failed>"
sys.stderr.write("Exception ignored in: %s\n" % obj_str_arg)
try:
import tb
tb.print_tb(tb, file=sys.stderr)
except:
pass
if not typ:
return
if typ.__module__ is None or typ.__name__ is None:
sys.stderr.write("<unknown>")
str_exc = None
try:
str_exc = str(obj)
except:
str_exc = "<exception str() failed>"
sys.stderr.write("%s.%s: %s" % (typ.__module__, typ.__name__, str_exc))
except:
pass
def _is_exception_class(exc):
return isinstance(exc, type) and issubclass(exc, BaseException)
def PyErr_GivenExceptionMatches(err, exc):
if isinstance(exc, tuple):
for e in exc:
if PyErr_GivenExceptionMatches(err, e):
return 1
return 0
if isinstance(err, BaseException):
err = type(err)
if _is_exception_class(err) and _is_exception_class(exc):
return issubclass(err, exc)
return exc is err
def _PyErr_NormalizeExceptionEx(exc, val, tb, recursion_depth):
pass
def PyErr_NormalizeException(exc, val, tb):
return _PyErr_NormalizeExceptionEx(exc, val, tb, 0)
@may_raise
def _PyErr_Warn(message, category, stack_level, source):
import warnings
warnings.warn(message, category, stack_level, source)
return None
## FILE
@may_raise(-1)
def PyFile_WriteObject(obj, file, flags):
if file is None:
raise TypeError("writeobject with NULL file")
if flags & 0x1:
write_value = str(obj)