int FUN_00481860(undefined4 param_1,byte param_2,int param_3,undefined4 param_4)

{

  bool bVar1;

  int iVar2;

  int iVar3;

  int iVar4;

  int iVar5;

  byte local_28 [8];

  iVar5 = 0;

  iVar2 = param_3;

  if ((param_2 & 0x80) != 0) {

    iVar2 = FUN_00483e50(param_4);

    iVar5 = param_3 - iVar2;

    if (iVar5 < 1) {

      iVar5 = 0;

    }

    else {

      local_28[0] = param_2 & 0x7f;

      iVar4 = iVar5;

      do {

        iVar3 = FUN_004887a0(local_28,1,param_1);

        if (iVar3 != 1) {

          iVar4 = iVar5 - iVar4;

          bVar1 = iVar4 != iVar5;

          iVar5 = iVar4;

          if (bVar1) {

            return iVar4;

          }

          break;

        }

        iVar4 = iVar4 + -1;

      } while (iVar4 != 0);

    }

  }

  iVar4 = 0;

  if (0 < iVar2) {

    iVar4 = FUN_004887a0(param_4,iVar2,param_1);

  }

  return iVar5 + iVar4;

}