old_bf_read::CheckReadUBitLong

/* old_bf_read::CheckReadUBitLong(int) */

uint __thiscall old_bf_read::CheckReadUBitLong(old_bf_read *this,int param_1)

{
  byte bVar1;
  int iVar2;
  byte bVar3;
  int iVar4;
  uint local_18;
  int local_14;
  
  if (param_1 < 1) {
    local_14 = *(int *)(this + 0xc);
    local_18 = 0;
  }
  else {
    iVar2 = *(int *)(this + 0xc);
    local_14 = param_1 + iVar2;
    local_18 = 0;
    iVar4 = iVar2;
    do {
      bVar3 = (byte)iVar4;
      bVar1 = *(byte *)(*(int *)this + (iVar4 >> 3));
      iVar4 = iVar4 + 1;
      *(int *)(this + 0xc) = iVar4;
      local_18 = local_18 |
                 (uint)(((uint)bVar1 & 1 << (bVar3 & 7)) != 0) << (bVar3 - (char)iVar2 & 0x1f);
    } while (iVar4 != local_14);
  }
  *(int *)(this + 0xc) = local_14 - param_1;
  return local_18;
}