def decX(self, l):
if len(self.bytes) < l :
raise py9p.Error("buffer exhausted")
x = "".join(self.bytes[:l])
#del self.bytes[:l]
self.bytes[:l] = [] # significant speedup
return x
def recv(self, fd):
"Read and decode a message"
self.setBuf(fd.read(4))
size = self.dec4()
if size > self.MAXSIZE or size < 4:
raise py9p.Error("Bad message size: %d" % size)
self.setBuf(fd.read(size - 4))
type,tag = self.dec1(),self.dec2()
self._checkType(type)
fcall = py9p.Fcall(type, tag)
self.dec(fcall)
self._checkResid()
if self.chatty:
print "<-%d-" % fd.fileno(), py9p.cmdName[type], tag, fcall.tostr()
return fcall
def _checkLen(self, x, l):
if len(x) != l:
raise py9p.Error("Wrong length %d, expected %d: %r" % (len(x), l, x))
def _checkSize(self, v, mask):
if v != v & mask:
raise py9p.Error("Invalid value %d" % v)
def _checkResid(self):
if len(self.bytes):
raise py9p.Error("Extra information in message: %r" % self.bytes)
def _checkType(self, t):
if t not in py9p.cmdName:
raise py9p.Error("Invalid message type %d" % t)