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from pypy.interpreter.error import OperationError, oefmt
from pypy.interpreter.typedef import (
TypeDef, generic_new_descr, GetSetProperty)
from pypy.interpreter.gateway import interp2app, unwrap_spec
from pypy.interpreter.buffer import SimpleView
from rpython.rlib.buffer import Buffer
from rpython.rlib.rStringIO import RStringIO
from rpython.rlib.rarithmetic import r_longlong
from rpython.rlib.objectmodel import import_from_mixin
from pypy.module._io.interp_bufferedio import W_BufferedIOBase
from pypy.module._io.interp_iobase import convert_size
import sys
class BytesIOBuffer(Buffer):
_immutable_ = True
def __init__(self, w_bytesio):
self.w_bytesio = w_bytesio
self.readonly = False
def getlength(self):
return int(self.w_bytesio.getsize())
def as_str(self):
return self.w_bytesio.getvalue()
def getitem(self, index):
# XXX: move this & setitem into rStringIO or some kind of
# rStringIOBufferView
w_bytesio = self.w_bytesio
tell = w_bytesio.tell()
try:
w_bytesio.seek(index)
item = w_bytesio.read(1)
# cast to char
assert len(item) == 1
return item[0]
finally:
w_bytesio.seek(tell)
def setitem(self, index, char):
w_bytesio = self.w_bytesio
tell = w_bytesio.tell()
try:
w_bytesio.seek(index)
w_bytesio.write(char)
finally:
w_bytesio.seek(tell)
class W_BytesIO(W_BufferedIOBase):
import_from_mixin(RStringIO)
def __init__(self, space):
W_BufferedIOBase.__init__(self, space, add_to_autoflusher=False)
self.init()
def descr_new(space, w_subtype, __args__):
self = space.allocate_instance(W_BytesIO, w_subtype)
W_BytesIO.__init__(self, space)
return self
def descr_init(self, space, w_initial_bytes=None):
self.init()
if not space.is_none(w_initial_bytes):
self.write_w(space, w_initial_bytes)
self.seek(0)
def _check_closed(self, space, message=None):
if self.is_closed():
if message is None:
message = "I/O operation on closed file"
raise OperationError(space.w_ValueError, space.newtext(message))
def read_w(self, space, w_size=None):
self._check_closed(space)
size = convert_size(space, w_size)
return space.newbytes(self.read(size))
def read1_w(self, space, w_size=None):
return self.read_w(space, w_size)
def readline_w(self, space, w_limit=None):
self._check_closed(space)
limit = convert_size(space, w_limit)
return space.newbytes(self.readline(limit))
def readinto_w(self, space, w_buffer):
self._check_closed(space)
rwbuffer = space.writebuf_w(w_buffer)
size = rwbuffer.getlength()
output = self.read(size)
self.output_slice(space, rwbuffer, 0, output)
return space.newint(len(output))
def write_w(self, space, w_data):
self._check_closed(space)
buf = space.buffer_w(w_data, space.BUF_CONTIG_RO).as_str()
length = len(buf)
if length <= 0:
return space.newint(0)
self.write(buf)
return space.newint(length)
def truncate_w(self, space, w_size=None):
self._check_closed(space)
pos = self.tell()
if space.is_none(w_size):
size = pos
else:
size = space.r_longlong_w(w_size)
if size < 0:
raise oefmt(space.w_ValueError, "negative size value")
self.truncate(size)
if size == pos:
self.seek(0, 2)
else:
self.seek(pos)
return space.newint(size)
def getbuffer_w(self, space):
self._check_closed(space)
return SimpleView(BytesIOBuffer(self), w_obj=self).wrap(space)
def getvalue_w(self, space):
self._check_closed(space)
return space.newbytes(self.getvalue())
def tell_w(self, space):
self._check_closed(space)
return space.newint(self.tell())
@unwrap_spec(pos=r_longlong, whence=int)
def seek_w(self, space, pos, whence=0):
self._check_closed(space)
if whence == 0:
if pos < 0:
raise oefmt(space.w_ValueError, "negative seek value")
elif whence == 1:
if pos > sys.maxint - self.tell():
raise oefmt(space.w_OverflowError, "new position too large")
elif whence == 2:
if pos > sys.maxint - self.getsize():
raise oefmt(space.w_OverflowError, "new position too large")
else:
raise oefmt(space.w_ValueError,
"whence must be between 0 and 2, not %d", whence)
self.seek(pos, whence)
return space.newint(self.tell())
def readable_w(self, space):
self._check_closed(space)
return space.w_True
def writable_w(self, space):
self._check_closed(space)
return space.w_True
def seekable_w(self, space):
self._check_closed(space)
return space.w_True
def close_w(self, space):
self.close()
def needs_finalizer(self):
# self.close() is not necessary when the object goes away
return type(self) is not W_BytesIO
def closed_get_w(self, space):
return space.newbool(self.is_closed())
def getstate_w(self, space):
self._check_closed(space)
return space.newtuple([
space.newbytes(self.getvalue()),
space.newint(self.tell()),
self.getdict(space)])
def setstate_w(self, space, w_state):
self._check_closed(space)
if space.len_w(w_state) != 3:
raise oefmt(space.w_TypeError,
"%T.__setstate__ argument should be 3-tuple, got %T",
self, w_state)
w_content, w_pos, w_dict = space.unpackiterable(w_state, 3)
self.truncate(0)
self.write_w(space, w_content)
pos = space.int_w(w_pos)
if pos < 0:
raise oefmt(space.w_ValueError,
"position value cannot be negative")
self.seek(pos)
if not space.is_w(w_dict, space.w_None):
space.call_method(self.getdict(space), "update", w_dict)
W_BytesIO.typedef = TypeDef(
'_io.BytesIO', W_BufferedIOBase.typedef, None, 'read-write',
__new__ = interp2app(W_BytesIO.descr_new.im_func),
__init__ = interp2app(W_BytesIO.descr_init),
read = interp2app(W_BytesIO.read_w),
read1 = interp2app(W_BytesIO.read1_w),
readline = interp2app(W_BytesIO.readline_w),
readinto = interp2app(W_BytesIO.readinto_w),
readinto1 = interp2app(W_BytesIO.readinto_w),
write = interp2app(W_BytesIO.write_w),
truncate = interp2app(W_BytesIO.truncate_w),
getbuffer = interp2app(W_BytesIO.getbuffer_w),
getvalue = interp2app(W_BytesIO.getvalue_w),
seek = interp2app(W_BytesIO.seek_w),
tell = interp2app(W_BytesIO.tell_w),
readable = interp2app(W_BytesIO.readable_w),
writable = interp2app(W_BytesIO.writable_w),
seekable = interp2app(W_BytesIO.seekable_w),
close = interp2app(W_BytesIO.close_w),
closed = GetSetProperty(W_BytesIO.closed_get_w),
__getstate__ = interp2app(W_BytesIO.getstate_w),
__setstate__ = interp2app(W_BytesIO.setstate_w),
)
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