internal CrcMaker(CrcEncoding A_0)
{
this.int_0 = 0x10;
this.long_0 = 0x1021L;
this.int_1 = 1;
this.long_1 = 0xffffL;
this.long_8 = new long[0x100];
this.method_0(A_0);
}
private void method_0(CrcEncoding A_0)
{
long num;
long num2;
int num3;
this.crcEncoding_0 = A_0;
switch (A_0)
{
case CrcEncoding.CRC16:
this.int_0 = 0x10;
this.int_1 = 1;
this.long_0 = 0x8005L;
this.long_1 = 0L;
this.long_2 = 0L;
this.int_2 = 1;
this.int_3 = 1;
break;
case CrcEncoding.CRC_CCITT:
this.int_0 = 0x10;
this.int_1 = 1;
this.long_0 = 0x1021L;
this.long_1 = 0xffffL;
this.long_2 = 0L;
this.int_2 = 0;
this.int_3 = 0;
break;
case CrcEncoding.CRC_CCITT_Reverse:
this.int_0 = 0x10;
this.int_1 = 1;
this.long_0 = 0x1021L;
this.long_1 = 0L;
this.long_2 = 0L;
this.int_2 = 1;
this.int_3 = 1;
break;
default:
this.int_0 = 0x20;
this.int_1 = 1;
this.long_0 = 0x4c11db7L;
this.long_1 = 0xffffffffL;
this.long_2 = 0xffffffffL;
this.int_2 = 1;
this.int_3 = 1;
break;
}
this.long_3 = (((1L << ((this.int_0 - 1) & 0x3f)) - 1L) << 1) | 1L;
this.long_4 = ((long)1L) << (this.int_0 - 1);
this.method_2();
if (this.int_1 == 0)
{
this.long_6 = this.long_1;
num = this.long_1;
for (num3 = 0; num3 < this.int_0; num3++)
{
num2 = num & this.long_4;
num = num << 1;
if (num2 != 0L)
{
num ^= this.long_0;
}
}
num &= this.long_3;
this.long_5 = num;
}
else
{
this.long_5 = this.long_1;
num = this.long_1;
for (num3 = 0; num3 < this.int_0; num3++)
{
num2 = num & 1L;
if (num2 != 0L)
{
num ^= this.long_0;
}
num = num >> 1;
if (num2 != 0L)
{
num |= this.long_4;
}
}
this.long_6 = num;
}
}
