CBitWrite::StartWriting

/* CBitWrite::StartWriting(void*, int, int, int) */

void __thiscall
CBitWrite::StartWriting(CBitWrite *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;
  }
  else {
    *(int *)(this + 8) = param_4;
  }
  this[4] = (CBitWrite)0x0;
  *(undefined4 *)(this + 0x10) = 0;
  *(undefined4 *)(this + 0x14) = 0x20;
  *(uint *)(this + 0x1c) = (int)param_1 + (param_2 & 0xfffffffcU);
  return;
}