bf_write::StartWriting

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

void __thiscall
bf_write::StartWriting(bf_write *this,void *param_1,int param_2,int param_3,int param_4)

{
  *(uint *)(this + 4) = param_2 & 0xfffffffcU;
  *(void **)this = param_1;
  if (param_4 != -1) {
    *(int *)(this + 8) = param_4;
    this[0x10] = (bf_write)0x0;
    *(int *)(this + 0xc) = param_3;
    return;
  }
  this[0x10] = (bf_write)0x0;
  *(uint *)(this + 8) = (param_2 & 0xfffffffcU) << 3;
  *(int *)(this + 0xc) = param_3;
  return;
}