def __get_table_init(self):
"""
Return the precalculated CRC table for the table_driven implementation.
"""
if self.opt.Algorithm != self.opt.Algo_Table_Driven:
return "0"
if self.opt.Width == None or self.opt.Poly == None or self.opt.ReflectIn == None:
return "0"
crc = Crc(width = self.opt.Width, poly = self.opt.Poly,
reflect_in = self.opt.ReflectIn,
xor_in = 0, reflect_out = False, xor_out = 0, # set unimportant variables to known values
table_idx_width = self.opt.TableIdxWidth)
tbl = crc.gen_table()
print crc.gen_slice_tables()
if self.opt.Width >= 32:
values_per_line = 4
elif self.opt.Width >= 16:
values_per_line = 8
else:
values_per_line = 16
format_width = max(self.opt.Width, 8)
out = ""
for i in range(self.opt.TableWidth):
if i % values_per_line == 0:
out += " "
if i == (self.opt.TableWidth - 1):
out += "%s" % self.__pretty_hex(tbl[i], format_width)
elif i % values_per_line == (values_per_line - 1):
out += "%s,\n" % self.__pretty_hex(tbl[i], format_width)
else:
out += "%s, " % self.__pretty_hex(tbl[i], format_width)
return out
