def pread(self, size=None, pos=None):
"""Read *pos*-length data starting from position *pos*.
This operation doesn't change the pointer position."""
size = int(self.size) if size is None else int(size)
pos = int(self.pos if pos is None else pos)
if size < 0:
raise ValueError("invalid size, %d" % size)
chunk = unistd.pread(self.fd, size, pos)
return chunk
def pread(self, size=None, pos=None):
"""Read *pos*-length data starting from position *pos*.
This operation doesn't change the pointer position."""
size = int(self.size) if size is None else int(size)
pos = int(self.pos if pos is None else pos)
if size < 0:
raise ValueError("invalid size, %d" % size)
chunk = unistd.pread(self.fd, size, pos)
return chunk
def read(self, size=None, pos=None):
"""Read *pos*-length data starting from position *pos*."""
size = int(self.size) if size is None else int(size)
pos = int(self.pos if pos is None else pos)
if size < 0:
raise ValueError("invalid size, %d" % size)
chunk = unistd.pread(self.fd, size, pos)
self.pos = pos + len(chunk)
return chunk
def read(self, size=None, pos=None):
"""Read *pos*-length data starting from position *pos*."""
size = int(self.size) if size is None else int(size)
pos = int(self.pos if pos is None else pos)
if size < 0:
raise ValueError("invalid size, %d" % size)
chunk = unistd.pread(self.fd, size, pos)
self.pos = pos + len(chunk)
return chunk