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# -*- coding: utf-8 -*-
class ByteUtil:
@staticmethod
def combine(*args):
baos = bytearray()
for a in args:
if type(a) in (list, bytearray, str, bytes):
baos.extend(a)
else:
baos.append(a)
return baos
# @staticmethod
# def xsplit(inp, firstLength, secondLength, thirdLength = None):
# parts = []
# parts.append(inp[:firstLength])
# parts.append(inp[len(parts[0]): secondLength + 1])
# if thirdLength:
# parts.append(inp[len(parts[1]): thirdLength + 1])
# return parts
@staticmethod
def split(inp, firstLength, secondLength, thirdLength=None):
parts = []
parts.append(inp[:firstLength])
parts.append(inp[firstLength:firstLength + secondLength])
if thirdLength is not None:
parts.append(inp[firstLength + secondLength: firstLength + secondLength + thirdLength])
return parts
@staticmethod
def trim(inp, length):
return inp[:length]
@staticmethod
def intsToByteHighAndLow(highValue, lowValue):
highValue = ord(highValue) if type(highValue) is str else highValue
lowValue = ord(lowValue) if type(lowValue) is str else lowValue
return ((highValue << 4 | lowValue) & 0xFF) % 256
@staticmethod
def highBitsToInt(value):
bit = ord(value) if type(value) is str else value
return (bit & 0xFF) >> 4
@staticmethod
def lowBitsToInt(value):
return value & 0xF
@staticmethod
def intToByteArray(_bytes, offset, value):
_bytes[offset + 3] = value % 256
_bytes[offset + 2] = (value >> 8) % 256
_bytes[offset + 1] = (value >> 16) % 256
_bytes[offset] = (value >> 24) % 256
return 4
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