F64 Clamp(F64 d,F64 lo,F64 hi)
{//Clamp to F64 [] range.
  if (d<lo)
    return lo;
  if (d>hi)
    return hi;
  return d;
}

F64 Min(F64 n1,F64 n2)
{//Min of two F64s.
  if (n1<=n2)
    return n1;
  else
    return n2;
}

F64 Max(F64 n1,F64 n2)
{//Max of two F64s.
  if (n1>=n2)
    return n1;
  else
    return n2;
}

F64 Pow10I64(I64 i)
{//F64 int powers of ten.
  if (i>308)
    return inf;
  else if (i<-308)
    return 0.0;
  else
    return pow10_I64[i+309];
}

U64 FloorU64(U64 num,U64 to)
{//Int multiples of num.
  return num-num%to;
}

U64 CeilU64(U64 num,U64 to)
{//Int multiples of num.
  num+=to-1;
  return num-num%to;
}

I64 RoundI64(I64 num,I64 to)
{//Int multiples of num.
  return num-num%to;
}

I64 FloorI64(I64 num,I64 to)
{//Int multiples of num.
  if (num>=0)
    return num-num%to;
  else
  {
    num++;
    return num-num%to-to;
  }
}

I64 CeilI64(I64 num,I64 to)
{//Int multiples of num.
  if (num>=0)
  {
    num+=to-1;
    return num-num%to;
  }
  else
  {
    num+=to-1;
    return num-num%to-to;
  }
}

I64 Seed(I64 seed=0,CTask *task=NULL)
{//Set Rand() seed. Zero for timer-based.
  if (!task) task=Fs;
  if (seed)
  {
    LBts(&task->task_flags,TASKf_NONTIMER_RAND);
    return task->rand_seed=seed;
  }
  else
  {
    LBtr(&task->task_flags,TASKf_NONTIMER_RAND);
    return task->rand_seed^=GetTSC;
  }
}