CBitRead::StartReading

/* CBitRead::StartReading(void const*, int, int, int) */

void __thiscall
CBitRead::StartReading(CBitRead *this,void *param_1,int param_2,int param_3,int param_4)

{
  *(void **)(this + 0x20) = param_1;
  *(void **)(this + 0x18) = param_1;
  *(int *)(this + 0xc) = param_2;
  if (param_4 == -1) {
    *(int *)(this + 8) = param_2 * 8;
    this[4] = (CBitRead)0x0;
    *(int *)(this + 0x1c) = param_2 + (int)param_1;
  }
  else {
    *(int *)(this + 8) = param_4;
    this[4] = (CBitRead)0x0;
    *(int *)(this + 0x1c) = param_2 + (int)param_1;
  }
  if (param_1 != (void *)0x0) {
    Seek(this,param_3);
    return;
  }
  return;
}