def test_SimpleView_basic():
buf = RawByteBuffer(10)
view = SimpleView(buf)
assert view.getlength() == 10
assert view.getformat() == 'B'
assert view.getitemsize() == 1
assert view.getndim() == 1
assert view.getshape() == [10]
assert view.getstrides() == [1]
assert view.as_readbuf() is view.as_writebuf() is buf
def _raw_read(self, space, buffer, start, length):
assert buffer is not None
length = intmask(length)
start = intmask(start)
w_view = SimpleView(SubBuffer(buffer, start, length)).wrap(space)
while True:
try:
w_size = space.call_method(self.w_raw, "readinto", w_view)
except OperationError as e:
if trap_eintr(space, e):
continue # try again
raise
else:
break
if space.is_w(w_size, space.w_None):
raise BlockingIOError()
size = space.int_w(w_size)
if size < 0 or size > length:
raise oefmt(
space.w_IOError,
"raw readinto() returned invalid length %d (should "
"have been between 0 and %d)", size, length)
if self.abs_pos != -1:
self.abs_pos += size
return size
def buffer_w(self, space, flags):
self.check_valid()
readonly = (self.mmap.access == ACCESS_READ)
write_required = bool(flags & space.BUF_WRITABLE)
if write_required and readonly:
raise oefmt(space.w_BufferError, "Object is not writable.")
return SimpleView(MMapBuffer(self.space, self.mmap, readonly))
def test_frombuffer(self, space, api):
w_view = SimpleView(StringBuffer("hello")).wrap(space)
w_memoryview = api.PyMemoryView_FromObject(w_view)
c_memoryview = rffi.cast(PyMemoryViewObject,
make_ref(space, w_memoryview))
view = c_memoryview.c_view
assert view.c_ndim == 1
f = rffi.charp2str(view.c_format)
assert f == 'B'
assert view.c_shape[0] == 5
assert view.c_strides[0] == 1
assert view.c_len == 5
o = rffi.charp2str(view.c_buf)
assert o == 'hello'
ref = api.PyMemoryView_FromBuffer(view)
w_mv = from_ref(space, ref)
for f in ('format', 'itemsize', 'ndim', 'readonly', 'shape', 'strides',
'suboffsets'):
w_f = space.wrap(f)
assert space.eq_w(space.getattr(w_mv, w_f),
space.getattr(w_memoryview, w_f))
decref(space, ref)
decref(space, c_memoryview)
def getbuffer_w(self, space):
self._check_closed(space)
return SimpleView(BytesIOBuffer(self)).wrap(space)
def buffer_w(self, space, flags):
return SimpleView(RawFFIBuffer(self))
def buffer_w(self, space, flags):
return SimpleView(self.buffer)
def buffer_w(self, space, flags):
return SimpleView(BytearrayBuffer(self))
def buffer_w(self, space, flags):
return SimpleView(StringBuffer("foobar"))
def buffer_w(self, space, flags):
space.check_buf_flags(flags, self.buf.readonly)
return SimpleView(self.buf)
def buffer_w(self, space, flags):
space.check_buf_flags(flags, True)
return SimpleView(StringBuffer(self._value))
def bytebuffer(space, length):
return SimpleView(ByteBuffer(length)).wrap(space)