bazarr/libs/asio/file.py

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2018-11-01 00:08:29 +08:00
# Copyright 2013 Dean Gardiner <gardiner91@gmail.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from io import RawIOBase
import time
DEFAULT_BUFFER_SIZE = 4096
SEEK_ORIGIN_BEGIN = 0
SEEK_ORIGIN_CURRENT = 1
SEEK_ORIGIN_END = 2
class ReadTimeoutError(Exception):
pass
class File(RawIOBase):
platform_handler = None
def __init__(self, *args, **kwargs):
super(File, self).__init__(*args, **kwargs)
def get_handler(self):
"""
:rtype: asio.interfaces.base.Interface
"""
if not self.platform_handler:
raise ValueError()
return self.platform_handler
def get_size(self):
"""Get the current file size
:rtype: int
"""
return self.get_handler().get_size(self)
def get_path(self):
"""Get the path of this file
:rtype: str
"""
return self.get_handler().get_path(self)
def seek(self, offset, origin):
"""Sets a reference point of a file to the given value.
:param offset: The point relative to origin to move
:type offset: int
:param origin: Reference point to seek (SEEK_ORIGIN_BEGIN, SEEK_ORIGIN_CURRENT, SEEK_ORIGIN_END)
:type origin: int
"""
return self.get_handler().seek(self, offset, origin)
def read(self, n=-1):
"""Read up to n bytes from the object and return them.
:type n: int
:rtype: str
"""
return self.get_handler().read(self, n)
def readinto(self, b):
"""Read up to len(b) bytes into bytearray b and return the number of bytes read."""
data = self.read(len(b))
if data is None:
return None
b[:len(data)] = data
return len(data)
def close(self):
"""Close the file handle"""
return self.get_handler().close(self)
def readable(self, *args, **kwargs):
return True