def __init__(self, file_path, data_fmt, meta_fmt=None):
self.DataSize = ustruct.calcsize(data_fmt)
self.DataFmt = data_fmt
self.UserMetaFmt = meta_fmt
self.IteratorIndexStart = 0
self.IteratorIndexEnd = 0
self.IteratorCount = 0
self.Iterator = None
self.OffsetUserMeta = 0
self.OffsetData = 0
if meta_fmt is not None:
self.UserMetaSize = ustruct.calcsize(meta_fmt)
Log.info("User meta size: {}".format(self.UserMetaSize))
else:
self.UserMetaSize = 0
self.FilePath = file_path
Log.info("Data size: {}".format(self.DataSize))
StructFile.META_SIZE = ustruct.calcsize(StructFile.META_FMT)
StructFile.OffsetUserMeta = StructFile.META_SIZE
self.OffsetData = self.OffsetUserMeta + self.UserMetaSize
Log.info("Meta offset: {}".format(StructFile.FILE_OFFSET_META))
Log.info("User meta offset: {}".format(self.OffsetUserMeta))
Log.info("Data offset: {}".format(self.OffsetData))
self._FileCreate()
self._FileInit()
def __init__(self):
self.is_secondary = False
self.pin = None
self.secret = None
self.is_empty = None
self.magic_value = PA_MAGIC_V2 if version.has_608 else PA_MAGIC_V1
self.delay_achieved = 0 # so far, how much time wasted?
self.delay_required = 0 # how much will be needed?
self.num_fails = 0 # for UI: number of fails PINs
self.attempts_left = 0 # ignore in mk1/2 case, only valid for mk3
self.state_flags = 0 # useful readback
self.private_state = 0 # opaque data, but preserve
self.cached_main_pin = bytearray(32)
assert MAX_PIN_LEN == 32 # update FMT otherwise
assert ustruct.calcsize(PIN_ATTEMPT_FMT_V1) == PIN_ATTEMPT_SIZE_V1, \
ustruct.calcsize(PIN_ATTEMPT_FMT)
assert ustruct.calcsize(PIN_ATTEMPT_FMT_V2_ADDITIONS
) == PIN_ATTEMPT_SIZE - PIN_ATTEMPT_SIZE_V1
self.buf = bytearray(
PIN_ATTEMPT_SIZE if version.has_608 else PIN_ATTEMPT_SIZE_V1)
# check for bricked system early
import callgate
if callgate.get_is_bricked():
# die right away if it's not going to work
callgate.enter_dfu(3)
class HCI_ACL(object):
"""HCI_ACL"""
struct_format = "<I"
struct_size = ustruct.calcsize(struct_format)
def __init__(self, handle, pb=0, bc=0, data=b''):
bin_str = "{:016b}{:02b}{:02b}{:012b}".format(
len(data) if data else 0, bc, pb, handle)
self._handle = handle
self._pb = pb
self._pb_name = PB_FLAGS[pb]
self._bc = bc
self._tobytes = int(bin_str, 2)
self._data = data
def __getattr__(self, name):
if name == "handle":
return self._handle
elif name == "pb":
return self._pb
elif name == "pb_name":
return self._pb_name
elif name == "bc":
return self._bc
elif name == "tobytes":
return self._tobytes
elif name == "length":
return len(self._data) if self._data else 0
elif name == "data":
return self._data[:self.length]
def __str__(self):
desc_str = ("<{:s} "
"handle=0x{:04x} pb={:s}(0x{:02x}) bc=0x{:02x} "
"length={:d} data={:s}>")
return desc_str.format(self.__class__.__name__, self.handle,
self.pb_name, self.pb, self.bc, self.length,
hexlify(self.data))
@staticmethod
def from_buffer(data):
"""
Parse HCI ACL data
References can be found here:
* https://www.bluetooth.org/en-us/specification/adopted-specifications
** Core specification 4.1
** [vol 2] Part E (Section 5) - HCI Data Formats
** [vol 2] Part E (Section 5.4) - Exchange of HCI-specific information
"""
hci_acl = uctypes.struct(uctypes.addressof(data[:HCI_ACL.struct_size]),
HCI_ACL_STRUCT, uctypes.LITTLE_ENDIAN)
data = data[HCI_ACL.struct_size:]
return HCI_ACL(hci_acl.handle, hci_acl.pb, hci_acl.bc, data)
def to_buffer(self):
"""
Get data string
"""
return ustruct.pack(self.struct_format, self.tobytes) + self.data
def _block(self, x0, y0, x1, y1, data=None):
self._write(0x15, self._encode_pos(x0, x1))
self._write(0x75, self._encode_pos(y0, y1))
if data is None:
size = ustruct.calcsize(">BBB")
return self._read(0x5D, (x1 - x0 + 1) * (y1 - y0 + 1) * size)
self._write(0x5C, data)
def readSeesaws(currentSeesaw):
success = False
#print('Requesting Info From Arduino')
# START COMMAND
arduinoUART.write(bytes([0xF0]))
# ADDRESS
arduinoUART.write(bytes([0x10 + currentSeesaw]))
# COMMAND
arduinoUART.write(bytes([0xA0]))
print('Request sent to arduino')
time.sleep(1)
while arduinoUART.any() >= ustruct.calcsize(seesawDataFormat):
sawBuf = arduinoUART.readline()
if not sawBuf:
print('No data received')
else:
#print('sawBuf:', sawBuf)
#resultBuf = ustruct.unpack('BHffbb', binascii.unhexlify(sawBuf))
try:
data = struct.unpack(seesawDataFormat,
sawBuf) # binascii.unhexlify(sawBuf)
#print('Result:', data)
uploadData(sawBuf)
success = True
except ValueError:
print('Incomplete Data...')
# Attempt to clear buffer?
arduinoUART.readall()
#print('SUCCESS?', success)
return success
def getpwnam(user):
passwd = getpwnam_(user)
if not passwd:
raise KeyError("getpwnam(): name not found: {}".format(user))
passwd_fmt = "SSIISSS"
passwd = uctypes.bytes_at(passwd, ustruct.calcsize(passwd_fmt))
passwd = ustruct.unpack(passwd_fmt, passwd)
return struct_passwd(*passwd)
def _registers(self, register, values=None, struct='B'):
if values is None:
size = ustruct.calcsize(struct)
data = self.i2c.readfrom_mem(self.address, register, size)
values = ustruct.unpack(struct, data)
return values
data = ustruct.pack(struct, *values)
self.i2c.writeto_mem(self.address, register, data)
def getpwnam(user):
passwd = getpwnam_(user)
if not passwd:
raise KeyError("getpwnam(): name not found: {}".format(user))
passwd_fmt = "SSIISSS"
passwd = uctypes.bytes_at(passwd, ustruct.calcsize(passwd_fmt))
passwd = ustruct.unpack(passwd_fmt, passwd)
return struct_passwd(*passwd)
def _block(self, x0, y0, x1, y1, data=None):
"""Read or write a block of data."""
self._write(self._COLUMN_SET, self._encode_pos(x0, x1))
self._write(self._PAGE_SET, self._encode_pos(y0, y1))
if data is None:
size = ustruct.calcsize(self._DECODE_PIXEL)
return self._read(self._RAM_READ, (x1 - x0 + 1) * (y1 - y0 + 1) * size) # noqa: E501
self._write(self._RAM_WRITE, data)
def test_ConstructorWithUserMeta(self):
user_meta_fmt = "<II"
os.remove(test_StructFile.TEST_FILE)
sf = StructFile.StructFile(test_StructFile.TEST_FILE,
test_StructFile.TEST_FMT, user_meta_fmt)
self.assertEqual(sf.DataSize,
ustruct.calcsize(test_StructFile.TEST_FMT))
file_exists = TestUtil.FileExists(test_StructFile.TEST_FILE)
self.assertTrue(file_exists)
def read(cls, f):
fmt = '<6sBBL'
bits = f.read(calcsize(fmt))
self = cls()
self.bits = bits
self.magic, self.major, self.minor, self.crc = unpack(fmt, bits)
return self
class HCI_SCO(object):
"""HCI_SCO"""
struct_format = "<HB"
struct_size = ustruct.calcsize(struct_format)
def __init__(self, handle, ps=0, xx=0, data=b''):
bin_str = "{:016b}{:02b}{:02b}{:012b}".format(
len(data) if data else 0, xx, ps, handle)
self._handle = handle
self._ps = ps
self._xx = xx
self._tobytes = int(bin_str, 2)
self._data = data
def __getattr__(self, name):
if name == "handle":
return self._handle
elif name == "ps":
return self._ps
elif name == "xx":
return self._xx
elif name == "tobytes":
return self._tobytes
elif name == "length":
return len(self._data) if self._data else 0
elif name == "data":
return self._data[:self.length]
def __str__(self):
desc_str = ("<{:s} "
"handle=0x{:04x} ps=0x{:02x} xx=0x{:02x} "
"length={:d} data={:s}>")
return desc_str.format(self.__class__.__name__, self.handle, self.ps,
self.xx, self.length, hexlify(self.data))
@staticmethod
def from_buffer(data):
"""
Parse HCI SCO data
References can be found here:
* https://www.bluetooth.org/en-us/specification/adopted-specifications
** Core specification 4.1
** [vol 2] Part E (Section 5) - HCI Data Formats
** [vol 2] Part E (Section 5.4) - Exchange of HCI-specific information
"""
hci_sco = uctypes.struct(uctypes.addressof(data[:HCI_SCO.struct_size]),
HCI_SCO_STRUCT, uctypes.LITTLE_ENDIAN)
data = data[HCI_SCO.struct_size:]
return HCI_SCO(hci_sco.handle, hci_sco.ps, hci_sco.xx, data)
def to_buffer(self):
"""
Get data string
"""
return ustruct.pack(self.struct_format, self.tobytes) + self.data
def _packetDecode(self, _id, _packet):
_packet = _packet[8:]
if _id in wm_codes:
if len(self.active_codes) > 0 and _id not in self.active_codes:
return None
_format = wm_codes[_id][0]
_sub_f = wm_codes[_id][1] if len(wm_codes[_id]) > 1 else False
_len = struct.calcsize(_format)
_data = struct.unpack(_format, _packet[:_len])
_remaining = _packet[_len:]
if _sub_f:
_sub_d = []
_sub_l = struct.calcsize(_sub_f)
while len(_remaining) > 0:
_d = struct.unpack(_sub_f, _remaining[:_sub_l])
_sub_d.append(_d)
_remaining = _remaining[_sub_l:]
_data = [_data, _sub_d]
return _data
def parseNtpResponse(data):
ubinascii.hexlify(data[40:44])
try:
unpacked = ustruct.unpack(_PACKET_FORMAT,
data[0:ustruct.calcsize(_PACKET_FORMAT)])
except ustruct.error:
print("struct unpack error")
ntp = unpacked[-2]
ntp = ntp - 2208988800
utime.localtime(ntp)
def _registers(self, register, struct, value=None, scale=1):
if value is None:
size = ustruct.calcsize(struct)
data = self.i2c.mem_read(size, self.address, register)
value = ustruct.unpack(struct, data)
if scale != 1:
value = tuple(v * scale for v in value)
return value
if scale != 1:
value = tuple(v / scale for v in value)
data = ustruct.pack(struct, *value)
self.i2c.mem_write(data, self.address, register)
class HCI_UART(object):
"""HCI_UART"""
struct_format = "<B"
struct_size = ustruct.calcsize(struct_format)
def __init__(self, pkt_type, data=b''):
self._pkt_type = pkt_type
self._pkt_type_name = HCI_UART_PKT_TYPES[pkt_type]
self._data = data
def __getattr__(self, name):
if name == "pkt_type":
return self._pkt_type
elif name == "pkt_type_name":
return self._pkt_type_name
elif name == "data":
return self._data
else:
raise AttributeError(name)
def __str__(self):
return "<{:s} pkt_type={:s}(0x{:02x}) data={:s}>".format(
self.__class__.__name__, self.pkt_type_name, self.pkt_type,
hexlify(self.data))
@staticmethod
def from_buffer(data):
"""
Parse a hci information from the specified data string
There are four kinds of HCI packets that can be sent via the UART Transport
Layer; i.e. HCI Command Packet, HCI Event Packet, HCI ACL Data Packet
and HCI Synchronous Data Packet (see Host Controller Interface Functional
Specification in Volume 2, Part E). HCI Command Packets can only be sent to
the Bluetooth Host Controller, HCI Event Packets can only be sent from the
Bluetooth Host Controller, and HCI ACL/Synchronous Data Packets can be
sent both to and from the Bluetooth Host Controller.
References can be found here:
* https://www.bluetooth.org/en-us/specification/adopted-specifications
** Core specification 4.1
** [vol 4] Part A (Section 2) Protocol
"""
pkt_type = ustruct.unpack(HCI_UART.struct_format,
data[:HCI_UART.struct_size])[0]
return HCI_UART(pkt_type, data[HCI_UART.struct_size:])
def to_buffer(self):
"""
Get data string
"""
return ustruct.pack(HCI_UART.struct_format, self.pkt_type) + self.data
def read(cls, f):
# read only next one; ftell has to be on first byte already
fmt = '<QQL'
sz = calcsize(fmt)
bits = f.read(sz)
if not bits:
return
rv = cls(*unpack(fmt, bits))
rv.bits = bits
return rv
def ilistdir_ex(path="."):
dir = opendir_(path)
if not dir:
raise_error()
res = []
dirent_fmt = "LLHB256s"
while True:
dirent = readdir_(dir)
if not dirent:
break
dirent = ffi.as_bytearray(dirent, struct.calcsize(dirent_fmt))
dirent = struct.unpack(dirent_fmt, dirent)
yield dirent
def ilistdir_ex(path="."):
dir = opendir_(path)
if not dir:
raise_error()
res = []
dirent_fmt = "LLHB256s"
while True:
dirent = readdir_(dir)
if not dirent:
break
dirent = ffi.as_bytearray(dirent, struct.calcsize(dirent_fmt))
dirent = struct.unpack(dirent_fmt, dirent)
yield dirent
def __init__(self):
self.is_secondary = False
self.pin = None
self.secret = None
self.is_empty = None
self.delay_achieved = 0 # so far, how much time wasted?
self.delay_required = 0 # how much will be needed?
self.num_fails = 0 # for UI: number of fails PINs
self.attempt_target = 0 # counter number from chip
self.state_flags = 0 # useful readback
self.private_state = 0 # opaque data, but preserve
assert MAX_PIN_LEN == 32 # update FMT otherwise
assert ustruct.calcsize(
PIN_ATTEMPT_FMT) == PIN_ATTEMPT_SIZE, ustruct.calcsize(
PIN_ATTEMPT_FMT)
self.buf = bytearray(PIN_ATTEMPT_SIZE)
# check for bricked system early
import callgate
if callgate.get_is_bricked():
# die right away if it's not going to work
callgate.enter_dfu(3)
class SMP(object):
"""SMP"""
struct_format = "<B"
struct_size = ustruct.calcsize(struct_format)
def __init__(self, code, data=b''):
self._code = code
self._code_name = SMP_PDUS[code]
self._data = data
def __getattr__(self, name):
if name == "code":
return self._code
elif name == "code_name":
return self._code_name
elif name == "length":
return len(self._data)
elif name == "data":
return self._data
def __str__(self):
desc_str = ("<{:s} " "code={:s}(0x{:02x}) length={:d} data={:s}>")
return desc_str.format(self.__class__.__name__, self.code_name,
self.code, self.length, hexlify(self.data))
@staticmethod
def from_buffer(data):
"""
SMP code is the first octet of the PDU
0 1 2 3 4 5 6 7
-----------------
| code |
-----------------
References can be found here:
* https://www.bluetooth.org/en-us/specification/adopted-specifications
** Core specification 4.1
** [vol 3] Part H (Section 3.3) - Command Format
"""
code = ustruct.unpack(SMP.struct_format, data[:SMP.struct_size])[0]
data = data[SMP.struct_size:]
return SMP(code, data)
def to_buffer(self):
"""
Get data string
"""
return ustruct.pack(self.struct_format, self.code) + self.data
def _registers(self, register, struct, value=None, scale=1):
if value is None:
size = ustruct.calcsize(struct)
self._verbose("i2c.read", hex(register), "->")
data = self.i2c.readfrom_mem(self.address, register, size)
value = ustruct.unpack(struct, data)
self._verbose(" ", data)
if scale != 1:
value = tuple(v * scale for v in value)
return value
if scale != 1:
value = tuple(v / scale for v in value)
data = ustruct.pack(struct, *value)
self._verbose("i2c.write", hex(register), "<-", data)
self.i2c.writeto_mem(self.address, register, data)
def get_ntp(self):
addr_info = getaddrinfo(self.NTP_HOST, self.NTP_PORT)
addr = addr_info[0][-1]
s = socket(AF_INET, SOCK_DGRAM)
s.sendto(self.NTP_QUERY, addr)
msg, address = s.recvfrom(self.NTP_BUFFSIZE)
s.close()
unpacked = struct.unpack(
self.NTP_PACKET_FORMAT,
msg[0:struct.calcsize(self.NTP_PACKET_FORMAT)])
# this won't work right on nodemcu - not enough bits for int ot something like that
#ts = unpacked[10] + float(unpacked[11]) / 2**32 - NTP_DELTA
# this will be good enough
ts = unpacked[10] - self.NTP_DELTA
return ts
def ilistdir(path="."):
dir = opendir_(path)
if not dir:
raise_error()
res = []
dirent_fmt = "LLHB256s"
while True:
dirent = readdir_(dir)
if not dirent:
break
import uctypes
dirent = uctypes.bytes_at(dirent, struct.calcsize(dirent_fmt))
dirent = struct.unpack(dirent_fmt, dirent)
dirent = (dirent[-1].split(b'\0', 1)[0], dirent[-2], dirent[0])
yield dirent
def ilistdir(path="."):
dir = opendir_(path)
if not dir:
raise_error()
res = []
dirent_fmt = "LLHB256s"
while True:
dirent = readdir_(dir)
if not dirent:
break
import uctypes
dirent = uctypes.bytes_at(dirent, struct.calcsize(dirent_fmt))
dirent = struct.unpack(dirent_fmt, dirent)
dirent = (dirent[-1].split(b'\0', 1)[0], dirent[-2], dirent[0])
yield dirent
def ntp_sync(self, ntp_server):
try:
NTP_QUERY = bytearray(48)
NTP_QUERY[0] = 0x1b
addr = socket.getaddrinfo(ntp_server, 123)[0][-1]
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.settimeout(1)
res = s.sendto(NTP_QUERY, addr)
msg = s.recv(48)
del(s) #s.close()
unpacked = struct.unpack(NTP_PACKET_FORMAT, msg[0:struct.calcsize(NTP_PACKET_FORMAT)])
self.ntp_epoch = (unpacked[10] + float(unpacked[11]) / 2**32 - NTP_DELTA)
self.ntp_sync_clk = time.time()
self.synced_ = True
except Exception as e:
print("Something wrong with the ntp-server: " + str(e))
return
def bytes_to_nums(self, b):
ret = []
i = 0
while i < len(b):
try:
t = ustruct.unpack('>s', b[i:i + 1]) # type
t = t[0].decode('utf-8')
fmt = '>' + t
try:
num = ustruct.unpack(fmt, b[i + 1:])
ret.append(num[0])
i = i + 1 + ustruct.calcsize(str(t))
except:
i = i + 1
except:
i = i + 1
return ret
def from_data(self, data):
print('from_data(', data)
# """Populate this instance from a NTP packet payload received from
# the network.
# Parameters:
# data -- buffer payload
# Raises:
# NTPException -- in case of invalid packet format
# """
try:
csize = struct.calcsize(NTPPacket._PACKET_FORMAT)
print('csize=', csize)
print('len(data)=', len(data))
unpacked = struct.unpack(NTPPacket._PACKET_FORMAT, data[0:csize])
except Exception as e213:
raise NTPException("220 Invalid NTP packet. " + str(e213))
self.leap = unpacked[0] >> 6 & 0x3
self.version = unpacked[0] >> 3 & 0x7
self.mode = unpacked[0] & 0x7
self.stratum = unpacked[1]
self.poll = unpacked[2]
self.precision = unpacked[3]
self.root_delay = float(unpacked[4]) / 2**16
self.root_dispersion = float(unpacked[5]) / 2**16
self.ref_id = unpacked[6]
self.ref_timestamp = _to_time(unpacked[7], unpacked[8])
self.orig_timestamp = _to_time(unpacked[9], unpacked[10])
self.orig_timestamp_high = unpacked[9]
self.orig_timestamp_low = unpacked[10]
self.recv_timestamp = _to_time(unpacked[11], unpacked[12])
self.tx_timestamp = _to_time(unpacked[13], unpacked[14])
self.tx_timestamp_high = unpacked[13]
self.tx_timestamp_low = unpacked[14]
# test ustruct with a count specified before the type
try:
import ustruct as struct
except:
try:
import struct
except ImportError:
print("SKIP")
raise SystemExit
print(struct.calcsize('0s'))
print(struct.unpack('0s', b''))
print(struct.pack('0s', b'123'))
print(struct.calcsize('2s'))
print(struct.unpack('2s', b'12'))
print(struct.pack('2s', b'123'))
print(struct.calcsize('2H'))
print(struct.unpack('<2H', b'1234'))
print(struct.pack('<2H', 258, 515))
print(struct.calcsize('0s1s0H2H'))
print(struct.unpack('<0s1s0H2H', b'01234'))
print(struct.pack('<0s1s0H2H', b'abc', b'abc', 258, 515))
# check that unknown types raise an exception
try:
struct.unpack('z', b'1')
except:
def _fcmd2b(self, fmt, a0, a1, a2, a3, a4=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2, a3, a4)
self._send(buf)
def _fcmd2(self, fmt, a0, a1=0, a2=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2)
self._send(buf)
def _fcmd2b(self, fmt, a0, a1, a2, a3, a4=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2, a3, a4)
self._send(buf)
def _fcmd2(self, fmt, a0, a1=0, a2=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2)
self._send(buf)
class ATT(object):
"""ATT"""
struct_format = "<B"
struct_size = ustruct.calcsize(struct_format)
def __init__(self, opcode, data=b''):
self._opcode = opcode
self._opcode_name = ATT_PDUS[opcode]
self._data = data
def __getattr__(self, name):
if name == "opcode":
return self._opcode
elif name == "opcode_name":
return self._opcode_name
elif name == "length":
return len(self._data)
elif name == "data":
return self._data
def __str__(self):
desc_str = ("<{:s} " "opcode={:s}(0x{:02x}) length={:d} data={:s}>")
return desc_str.format(self.__class__.__name__, self.opcode_name,
self.opcode, self.length, hexlify(self.data))
@staticmethod
def from_buffer(data):
"""
Attribute opcode is the first octet of the PDU
0 1 2 3 4 5 6 7
-----------------
| att opcode |
-----------------
| a |b|c|
-----------------
a - method
b - command flag
c - authentication signature flag
References can be found here:
* https://www.bluetooth.org/en-us/specification/adopted-specifications
** Core specification 4.1
** [vol 3] Part F (Section 3.3) - Attribute PDU
"""
opcode = ustruct.unpack(ATT.struct_format, data[:ATT.struct_size])[0]
# att = uctypes.struct(
# uctypes.addressof(data[:ATT.struct_size]),
# ATT_STRUCT,
# uctypes.LITTLE_ENDIAN
# )
data = data[ATT.struct_size:]
return ATT(opcode, data)
def to_buffer(self):
"""
Get data string
"""
return ustruct.pack(self.struct_format, self.opcode) + self._data
# check cases converting float to int, relying only on single precision float
try:
import ustruct as struct
except:
import struct
# work out configuration values
is_64bit = struct.calcsize("P") == 8
# 0 = none, 1 = long long, 2 = mpz
try:
dummy = 0x7fffffffffffffff
try:
if (0xffffffffffffffff + 1) > 0:
ll_type = 2
else:
ll_type = 1
except:
# in case the sum in the if statement above changes to raising an exception on overflow
ll_type = 1
except:
ll_type = 0
# basic conversion
print(int(14187745.))
print("%d" % 14187745.)
if ll_type == 2:
print(int(2.**100))
print("%d" % 2.**100)
testpass = True
def test_Constructor(self):
self.assertEqual(self.Sf.DataSize,
ustruct.calcsize(test_StructFile.TEST_FMT))
file_exists = TestUtil.FileExists(test_StructFile.TEST_FILE)
self.assertTrue(file_exists)
# test ustruct with a count specified before the type
try:
import ustruct as struct
except:
try:
import struct
except ImportError:
import sys
print("SKIP")
sys.exit()
print(struct.calcsize('0s'))
print(struct.unpack('0s', b''))
print(struct.pack('0s', b'123'))
print(struct.calcsize('2s'))
print(struct.unpack('2s', b'12'))
print(struct.pack('2s', b'123'))
print(struct.calcsize('2H'))
print(struct.unpack('<2H', b'1234'))
print(struct.pack('<2H', 258, 515))
print(struct.calcsize('0s1s0H2H'))
print(struct.unpack('<0s1s0H2H', b'01234'))
print(struct.pack('<0s1s0H2H', b'abc', b'abc', 258, 515))
# check that unknown types raise an exception
try:
struct.unpack('z', b'1')
def payload_size(cls):
return ustruct.calcsize(cls.fmt) # Size of subclass packed data
EPOLLONESHOT = 1 << 30
EPOLLET = 1 << 31
EPOLL_CTL_ADD = 1
EPOLL_CTL_DEL = 2
EPOLL_CTL_MOD = 3
# TODO: struct epoll_event's 2nd member is union of uint64_t, etc.
# On x86, uint64_t is 4-byte aligned, on many other platforms - 8-byte.
# Until uctypes module can assign native struct offset, use dirty hack
# below.
# TODO: Get rid of all this dirtiness, move it on C side
if _libc.bitness > 32:
# On x86_64, epoll_event is packed struct
epoll_event = "<IO"
elif struct.calcsize("IQ") == 12:
epoll_event = "IO"
else:
epoll_event = "QO"
class Epoll:
def __init__(self, epfd):
self.epfd = epfd
self.evbuf = struct.pack(epoll_event, 0, None)
self.registry = {}
def register(self, fd, eventmask=EPOLLIN|EPOLLPRI|EPOLLOUT, retval=None):
"retval is extension to stdlib, value to use in results from .poll()."
if retval is None:
retval = fd
try:
import ustruct as struct
except:
try:
import struct
except ImportError:
import sys
print("SKIP")
sys.exit()
print(struct.calcsize("<bI"))
print(struct.unpack("<bI", b"\x80\0\0\x01\0"))
print(struct.calcsize(">bI"))
print(struct.unpack(">bI", b"\x80\0\0\x01\0"))
# 32-bit little-endian specific
#print(struct.unpack("bI", b"\x80\xaa\x55\xaa\0\0\x01\0"))
print(struct.pack("<l", 1))
print(struct.pack(">l", 1))
print(struct.pack("<i", 1))
print(struct.pack(">i", 1))
print(struct.pack("<h", 1))
print(struct.pack(">h", 1))
print(struct.pack("<b", 1))
print(struct.pack(">b", 1))
print(struct.pack("<bI", -128, 256))
print(struct.pack(">bI", -128, 256))
print(struct.calcsize("100sI"))