Python api.build_type_checkers函数代码示例

from rpython.rtyper.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import (cpython_api, CANNOT_FAIL, Py_ssize_t,
                                    build_type_checkers)
from pypy.module.cpyext.pyerrors import PyErr_BadInternalCall
from pypy.module.cpyext.pyobject import Py_DecRef, PyObject, borrow_from
from pypy.objspace.std.listobject import W_ListObject
from pypy.interpreter.error import OperationError


PyList_Check, PyList_CheckExact = build_type_checkers("List")

@cpython_api([Py_ssize_t], PyObject)
def PyList_New(space, len):
    """Return a new list of length len on success, or NULL on failure.
    
    If length is greater than zero, the returned list object's items are
    set to NULL.  Thus you cannot use abstract API functions such as
    PySequence_SetItem()  or expose the object to Python code before
    setting all items to a real object with PyList_SetItem().
    """
    return space.newlist([None] * len)

@cpython_api([PyObject, Py_ssize_t, PyObject], rffi.INT_real, error=-1)
def PyList_SetItem(space, w_list, index, w_item):
    """Set the item at index index in list to item.  Return 0 on success
    or -1 on failure.
    
    This function "steals" a reference to item and discards a reference to
    an item already in the list at the affected position.
    """

from rpython.rtyper.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import (
    cpython_api, CANNOT_FAIL, build_type_checkers, Py_ssize_t,
    Py_ssize_tP, CONST_STRING)
from pypy.module.cpyext.pyobject import PyObject, PyObjectP, as_pyobj
from pypy.module.cpyext.pyerrors import PyErr_BadInternalCall
from pypy.interpreter.error import OperationError
from rpython.rlib.objectmodel import specialize

@cpython_api([], PyObject)
def PyDict_New(space):
    return space.newdict()

PyDict_Check, PyDict_CheckExact = build_type_checkers("Dict")

@cpython_api([PyObject, PyObject], PyObject, error=CANNOT_FAIL,
             result_borrowed=True)
def PyDict_GetItem(space, w_dict, w_key):
    try:
        w_res = space.getitem(w_dict, w_key)
    except:
        return None
    # NOTE: this works so far because all our dict strategies store
    # *values* as full objects, which stay alive as long as the dict is
    # alive and not modified.  So we can return a borrowed ref.
    # XXX this is wrong with IntMutableCell.  Hope it works...
    return w_res

@cpython_api([PyObject, PyObject, PyObject], rffi.INT_real, error=-1)
def PyDict_SetItem(space, w_dict, w_key, w_obj):
    if PyDict_Check(space, w_dict):

    value must not be modified.
    """
    py_int = rffi.cast(PyIntObject, py_obj)
    py_int.c_ob_ival = space.int_w(w_obj)


def int_realize(space, obj):
    intval = rffi.cast(lltype.Signed, rffi.cast(PyIntObject, obj).c_ob_ival)
    w_type = from_ref(space, rffi.cast(PyObject, obj.c_ob_type))
    w_obj = space.allocate_instance(W_IntObject, w_type)
    w_obj.__init__(intval)
    track_reference(space, obj, w_obj)
    return w_obj


PyInt_Check, PyInt_CheckExact = build_type_checkers("Int")


@cpython_api([], lltype.Signed, error=CANNOT_FAIL)
def PyInt_GetMax(space):
    """Return the system's idea of the largest integer it can handle (LONG_MAX,
    as defined in the system header files)."""
    return sys.maxint


@cpython_api([lltype.Signed], PyObject)
def PyInt_FromLong(space, ival):
    """Create a new integer object with a value of ival.

    """
    return space.wrap(ival)

from pypy.module.cpyext.typeobjectdefs import (
    PyTypeObjectPtr, PyTypeObject, PyGetSetDef, PyMemberDef, newfunc,
    PyNumberMethods, PyMappingMethods, PySequenceMethods, PyBufferProcs)
from pypy.module.cpyext.slotdefs import (
    slotdefs_for_tp_slots, slotdefs_for_wrappers, get_slot_tp_function)
from pypy.interpreter.buffer import Buffer
from pypy.interpreter.error import OperationError
from pypy.rlib.rstring import rsplit
from pypy.rlib.objectmodel import specialize
from pypy.module.__builtin__.abstractinst import abstract_issubclass_w
from pypy.module.__builtin__.interp_classobj import W_ClassObject
from pypy.rlib import jit

WARN_ABOUT_MISSING_SLOT_FUNCTIONS = False

PyType_Check, PyType_CheckExact = build_type_checkers("Type", "w_type")

PyHeapTypeObjectStruct = lltype.ForwardReference()
PyHeapTypeObject = lltype.Ptr(PyHeapTypeObjectStruct)
PyHeapTypeObjectFields = (
    ("ht_type", PyTypeObject),
    ("ht_name", PyObject),
    ("as_number", PyNumberMethods),
    ("as_mapping", PyMappingMethods),
    ("as_sequence", PySequenceMethods),
    ("as_buffer", PyBufferProcs),
    )
cpython_struct("PyHeapTypeObject", PyHeapTypeObjectFields, PyHeapTypeObjectStruct,
               level=2)

class W_GetSetPropertyEx(GetSetProperty):

    w_self = None
    def __init__(self, space, ml, w_type):
        self.space = space
        self.ml = ml
        self.name = rffi.charp2str(ml.c_ml_name)
        self.w_objclass = w_type

    def __repr__(self):
        return self.space.unwrap(self.descr_method_repr())

    def descr_method_repr(self):
        return self.getrepr(self.space,
                            "built-in method '%s' of '%s' object" %
                            (self.name, self.w_objclass.getname(self.space)))

PyCFunction_Check, PyCFunction_CheckExact = build_type_checkers(
    "CFunction", W_PyCFunctionObject)

class W_PyCClassMethodObject(W_PyCFunctionObject):
    w_self = None
    def __init__(self, space, ml, w_type):
        self.space = space
        self.ml = ml
        self.name = rffi.charp2str(ml.c_ml_name)
        self.w_objclass = w_type

    def __repr__(self):
        return self.space.unwrap(self.descr_method_repr())

    def descr_method_repr(self):
        return self.getrepr(self.space,
                            "built-in method '%s' of '%s' object" %

PyTupleObject = lltype.Ptr(PyTupleObjectStruct)
ObjectItems = rffi.CArray(PyObject)
PyTupleObjectFields = PyVarObjectFields + \
    (("ob_item", ObjectItems),)
cpython_struct("PyTupleObject", PyTupleObjectFields, PyTupleObjectStruct)

@bootstrap_function
def init_stringobject(space):
    "Type description of PyTupleObject"
    make_typedescr(space.w_tuple.layout.typedef,
                   basestruct=PyTupleObject.TO,
                   attach=tuple_attach,
                   dealloc=tuple_dealloc,
                   realize=tuple_realize)

PyTuple_Check, PyTuple_CheckExact = build_type_checkers("Tuple")

def tuple_check_ref(space, ref):
    w_type = from_ref(space, rffi.cast(PyObject, ref.c_ob_type))
    return (w_type is space.w_tuple or
            space.issubtype_w(w_type, space.w_tuple))

def new_empty_tuple(space, length):
    """
    Allocate a PyTupleObject and its array of PyObject *, but without a
    corresponding interpreter object.  The array may be mutated, until
    tuple_realize() is called.  Refcount of the result is 1.
    """
    typedescr = get_typedescr(space.w_tuple.layout.typedef)
    py_obj = typedescr.allocate(space, space.w_tuple, length)
    py_tup = rffi.cast(PyTupleObject, py_obj)

from pypy.module.cpyext.api import (cpython_api, Py_buffer, CANNOT_FAIL,
                         Py_MAX_FMT, Py_MAX_NDIMS, build_type_checkers, Py_ssize_tP)
from pypy.module.cpyext.pyobject import PyObject, make_ref, incref, from_ref
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rlib.rarithmetic import widen
from pypy.objspace.std.memoryobject import W_MemoryView
from pypy.module.cpyext.import_ import PyImport_Import

PyMemoryView_Check, PyMemoryView_CheckExact = build_type_checkers("MemoryView", "w_memoryview")

@cpython_api([PyObject, lltype.Ptr(Py_buffer), rffi.INT_real],
             rffi.INT_real, error=-1)
def PyObject_GetBuffer(space, w_obj, view, flags):
    """Export obj into a Py_buffer, view.  These arguments must
    never be NULL.  The flags argument is a bit field indicating what
    kind of buffer the caller is prepared to deal with and therefore what
    kind of buffer the exporter is allowed to return.  The buffer interface
    allows for complicated memory sharing possibilities, but some caller may
    not be able to handle all the complexity but may want to see if the
    exporter will let them take a simpler view to its memory.

    Some exporters may not be able to share memory in every possible way and
    may need to raise errors to signal to some consumers that something is
    just not possible. These errors should be a BufferError unless
    there is another error that is actually causing the problem. The
    exporter can use flags information to simplify how much of the
    Py_buffer structure is filled in with non-default values and/or
    raise an error if the object can't support a simpler view of its memory.

    0 is returned on success and -1 on error."""
    flags = widen(flags)

PyStringObjectStruct = lltype.ForwardReference()
PyStringObject = lltype.Ptr(PyStringObjectStruct)
PyStringObjectFields = PyObjectFields + \
    (("buffer", rffi.CCHARP), ("size", Py_ssize_t))
cpython_struct("PyStringObject", PyStringObjectFields, PyStringObjectStruct)

@bootstrap_function
def init_stringobject(space):
    "Type description of PyStringObject"
    make_typedescr(space.w_str.instancetypedef,
                   basestruct=PyStringObject.TO,
                   attach=string_attach,
                   dealloc=string_dealloc,
                   realize=string_realize)

PyString_Check, PyString_CheckExact = build_type_checkers("String", "w_str")

def new_empty_str(space, length):
    """
    Allocatse a PyStringObject and its buffer, but without a corresponding
    interpreter object.  The buffer may be mutated, until string_realize() is
    called.
    """
    typedescr = get_typedescr(space.w_str.instancetypedef)
    py_obj = typedescr.allocate(space, space.w_str)
    py_str = rffi.cast(PyStringObject, py_obj)

    buflen = length + 1
    py_str.c_size = length
    py_str.c_buffer = lltype.malloc(rffi.CCHARP.TO, buflen,
                                    flavor='raw', zero=True)

# The only way to go between bytes and str/unicode is via encoding
# and decoding.
# For the convenience of C programmers, the bytes type is considered
# to contain a char pointer, not an unsigned char pointer.

# Expose data as a rw cchar* only through PyByteArray_AsString
# Under this strategy the pointer could loose its synchronization with
# the underlying space.w_bytearray if PyByteArray_Resize is called, so
# hopefully the use of the pointer is short-lived

PyByteArrayObjectStruct = lltype.ForwardReference()
PyByteArrayObject = lltype.Ptr(PyByteArrayObjectStruct)
PyByteArrayObjectFields = PyVarObjectFields
cpython_struct("PyByteArrayObject", PyByteArrayObjectFields, PyByteArrayObjectStruct)

PyByteArray_Check, PyByteArray_CheckExact = build_type_checkers("ByteArray", "w_bytearray")

#_______________________________________________________________________

@cpython_api([PyObject], PyObject, result_is_ll=True)
def PyByteArray_FromObject(space, w_obj):
    """Return a new bytearray object from any object, o, that implements the
    buffer protocol.

    XXX expand about the buffer protocol, at least somewhere"""
    w_buffer = space.call_function(space.w_bytearray, w_obj)
    return make_ref(space, w_buffer)

@cpython_api([CONST_STRING, Py_ssize_t], PyObject, result_is_ll=True)
def PyByteArray_FromStringAndSize(space, char_p, length):
    """Create a new bytearray object from string and its length, len.  On

from pypy.rpython.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import (
    cpython_api, CANNOT_FAIL, CONST_STRING, FILEP, build_type_checkers)
from pypy.module.cpyext.pyobject import PyObject, borrow_from
from pypy.module.cpyext.object import Py_PRINT_RAW
from pypy.interpreter.error import OperationError
from pypy.module._file.interp_file import W_File

PyFile_Check, PyFile_CheckExact = build_type_checkers("File", W_File)

@cpython_api([PyObject, rffi.INT_real], PyObject)
def PyFile_GetLine(space, w_obj, n):
    """
    Equivalent to p.readline([n]), this function reads one line from the
    object p.  p may be a file object or any object with a readline()
    method.  If n is 0, exactly one line is read, regardless of the length of
    the line.  If n is greater than 0, no more than n bytes will be read
    from the file; a partial line can be returned.  In both cases, an empty string
    is returned if the end of the file is reached immediately.  If n is less than
    0, however, one line is read regardless of length, but EOFError is
    raised if the end of the file is reached immediately."""
    try:
        w_readline = space.getattr(w_obj, space.wrap('readline'))
    except OperationError:
        raise OperationError(
            space.w_TypeError, space.wrap(
            "argument must be a file, or have a readline() method."))

    n = rffi.cast(lltype.Signed, n)
    if space.is_true(space.gt(space.wrap(n), space.wrap(0))):
        return space.call_function(w_readline, space.wrap(n))

from pypy.rpython.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import (
    CANNOT_FAIL, cpython_api, PyObject, build_type_checkers, CONST_STRING)
from pypy.interpreter.error import OperationError
from pypy.rlib.rstruct import runpack

PyFloat_Check, PyFloat_CheckExact = build_type_checkers("Float")

@cpython_api([lltype.Float], PyObject)
def PyFloat_FromDouble(space, value):
    return space.wrap(value)

@cpython_api([PyObject], lltype.Float, error=-1)
def PyFloat_AsDouble(space, w_obj):
    return space.float_w(space.float(w_obj))

@cpython_api([PyObject], lltype.Float, error=CANNOT_FAIL)
def PyFloat_AS_DOUBLE(space, w_float):
    """Return a C double representation of the contents of w_float, but
    without error checking."""
    return space.float_w(w_float)

@cpython_api([PyObject], PyObject)
def PyNumber_Float(space, w_obj):
    """
    Returns the o converted to a float object on success, or NULL on failure.
    This is the equivalent of the Python expression float(o)."""
    return space.call_function(space.w_float, w_obj)

@cpython_api([PyObject, rffi.CCHARPP], PyObject)
def PyFloat_FromString(space, w_obj, _):

from pypy.rpython.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import (cpython_api, PyObject, CANNOT_FAIL,
                                    build_type_checkers)

# Inheriting from bool isn't actually possible.
PyBool_Check = build_type_checkers("Bool")[1]

@cpython_api([rffi.LONG], PyObject)
def PyBool_FromLong(space, value):
    if value != 0:
        return space.w_True
    return space.w_False

from rpython.rtyper.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import (
    PyObjectFields, CANNOT_FAIL,
    cpython_api, bootstrap_function, cpython_struct, build_type_checkers)
from pypy.module.cpyext.pyobject import PyObject, make_ref, from_ref, Py_DecRef, make_typedescr
from pypy.module.cpyext.pyerrors import PyErr_BadInternalCall
from pypy.module.__builtin__.interp_classobj import W_ClassObject, W_InstanceObject

PyClass_Check, PyClass_CheckExact = build_type_checkers("Class", W_ClassObject)
PyInstance_Check, PyInstance_CheckExact = build_type_checkers("Instance", W_InstanceObject)

@cpython_api([PyObject, PyObject], PyObject)
def PyInstance_NewRaw(space, w_class, w_dict):
    """Create a new instance of a specific class without calling its constructor.
    class is the class of new object.  The dict parameter will be used as the
    object's __dict__; if NULL, a new dictionary will be created for the
    instance."""
    if not isinstance(w_class, W_ClassObject):
        return PyErr_BadInternalCall(space)
    w_result = w_class.instantiate(space)
    if w_dict is not None:
        w_result.setdict(space, w_dict)
    return w_result

@cpython_api([PyObject, PyObject, PyObject], PyObject)
def PyInstance_New(space, w_cls, w_arg, w_kw):
    """Create a new instance of a specific class.  The parameters arg and kw are
    used as the positional and keyword parameters to the object's constructor."""
    return space.call(w_cls, w_arg, w_kw)

@cpython_api([PyObject, PyObject], PyObject, error=CANNOT_FAIL)

from pypy.rpython.lltypesystem import lltype, rffi
from pypy.module.cpyext.api import (
    cpython_api, PyObject, build_type_checkers, Py_ssize_t,
    CONST_STRING, ADDR, CANNOT_FAIL)
from pypy.objspace.std.longobject import W_LongObject
from pypy.interpreter.error import OperationError
from pypy.module.cpyext.intobject import PyInt_AsUnsignedLongMask
from pypy.rlib.rbigint import rbigint
from pypy.rlib.rarithmetic import intmask


PyLong_Check, PyLong_CheckExact = build_type_checkers("Long")

@cpython_api([lltype.Signed], PyObject)
def PyLong_FromLong(space, val):
    """Return a new PyLongObject object from v, or NULL on failure."""
    return space.newlong(val)

@cpython_api([Py_ssize_t], PyObject)
def PyLong_FromSsize_t(space, val):
    """Return a new PyLongObject object from a C Py_ssize_t, or
    NULL on failure.
    """
    return space.newlong(val)

@cpython_api([rffi.LONGLONG], PyObject)
def PyLong_FromLongLong(space, val):
    """Return a new PyLongObject object from a C long long, or NULL
    on failure."""
    return space.wrap(val)

from pypy.interpreter.error import OperationError
from rpython.rtyper.lltypesystem import rffi, lltype
from pypy.module.cpyext.api import cpython_api, Py_ssize_t, CANNOT_FAIL, build_type_checkers
from pypy.module.cpyext.pyobject import PyObject, PyObjectP, Py_DecRef, borrow_from, make_ref, from_ref
from pypy.module.cpyext.pyerrors import PyErr_BadInternalCall
from pypy.objspace.std.setobject import W_SetObject, newset


PySet_Check, PySet_CheckExact = build_type_checkers("Set")


@cpython_api([PyObject], PyObject)
def PySet_New(space, w_iterable):
    """Return a new set containing objects returned by the iterable.  The
    iterable may be NULL to create a new empty set.  Return the new set on
    success or NULL on failure.  Raise TypeError if iterable is not
    actually iterable.  The constructor is also useful for copying a set
    (c=set(s))."""
    if w_iterable is None:
        return space.call_function(space.w_set)
    else:
        return space.call_function(space.w_set, w_iterable)


@cpython_api([PyObject, PyObject], rffi.INT_real, error=-1)
def PySet_Add(space, w_s, w_obj):
    """Add key to a set instance.  Does not apply to frozenset
    instances.  Return 0 on success or -1 on failure. Raise a TypeError if
    the key is unhashable. Raise a MemoryError if there is no room to grow.
    Raise a SystemError if set is an not an instance of set or its
    subtype.