internal double Evaluate( Cdef cdef, int row, long timestamp )
{
stack.Clear();
byte[] tokens = cdef.Tokens;
int[] dsIndices = cdef.DsIndices;
double[] constants = cdef.Constants;
Random autoRand = new Random();
double x1, x2, x3;
for ( int i = 0; i < tokens.Length; i++ )
{
switch ( tokens[i] )
{
case TKN_CONSTANT:
Push( constants[i] );
break;
case TKN_DATASOURCE:
Push( sources[ dsIndices[i] ].Get(row) );
break;
case TKN_PLUS:
Push(Pop() + Pop());
break;
case TKN_MINUS:
x2 = Pop();
x1 = Pop();
Push(x1 - x2);
break;
case TKN_MULTIPLY:
Push(Pop() * Pop());
break;
case TKN_DIVIDE:
x2 = Pop();
x1 = Pop();
Push(x1 / x2);
break;
case TKN_MOD:
x2 = Pop();
x1 = Pop();
Push(x1 % x2);
break;
case TKN_SIN:
Push(Math.Sin(Pop()));
break;
case TKN_COS:
Push(Math.Cos(Pop()));
break;
case TKN_LOG:
Push(Math.Log(Pop()));
break;
case TKN_EXP:
Push(Math.Exp(Pop()));
break;
case TKN_FLOOR:
Push(Math.Floor(Pop()));
break;
case TKN_CEIL:
Push(Math.Ceiling(Pop()));
break;
case TKN_ROUND:
Push(Math.Round(Pop(), MidpointRounding.AwayFromZero));
break;
case TKN_POW:
x2 = Pop();
x1 = Pop();
Push(Math.Pow(x1, x2));
break;
case TKN_ABS:
Push(Math.Abs(Pop()));
break;
case TKN_SQRT:
Push(Math.Sqrt(Pop()));
break;
case TKN_RANDOM:
Push(autoRand.Next());
break;
case TKN_LT:
x2 = Pop();
x1 = Pop();
Push(x1 < x2? 1: 0);
break;
case TKN_LE:
x2 = Pop();
x1 = Pop();
Push(x1 <= x2? 1: 0);
break;
case TKN_GT:
x2 = Pop();
x1 = Pop();
Push(x1 > x2? 1: 0);
break;
case TKN_GE:
x2 = Pop();
x1 = Pop();
Push(x1 >= x2? 1: 0);
break;
case TKN_EQ:
x2 = Pop();
x1 = Pop();
Push(x1 == x2? 1: 0);
break;
case TKN_IF:
x3 = Pop();
x2 = Pop();
x1 = Pop();
Push(x1 != 0 ? x2: x3);
break;
case TKN_MIN:
Push(Math.Min(Pop(), Pop()));
break;
case TKN_MAX:
Push(Math.Max(Pop(), Pop()));
break;
case TKN_LIMIT:
double high = Pop(), low = Pop(), val = Pop();
Push(val < low || val > high? Double.NaN: val);
break;
case TKN_DUP:
double x = Pop();
Push(x);
Push(x);
break;
case TKN_EXC:
x2 = Pop();
x1 = Pop();
Push(x2);
Push(x1);
break;
case TKN_POP:
Pop();
break;
case TKN_UN:
Push(Double.IsNaN(Pop())? 1: 0);
break;
case TKN_UNKN:
Push(Double.NaN);
break;
case TKN_NOW:
Push(Util.Time);
break;
case TKN_TIME:
Push(timestamp);
break;
case TKN_PI:
Push(Math.PI);
break;
case TKN_E:
Push(Math.E);
break;
case TKN_AND:
x2 = Pop();
x1 = Pop();
Push((x1 != 0 && x2 != 0)? 1: 0);
break;
case TKN_OR:
x2 = Pop();
x1 = Pop();
Push((x1 != 0 || x2 != 0)? 1: 0);
break;
case TKN_XOR:
x2 = Pop();
x1 = Pop();
Push(((x1 != 0 && x2 == 0) || (x1 == 0 && x2 != 0))? 1: 0);
break;
case TKN_SAMPLES:
Push (cdef.SampleCount);
break;
case TKN_STEP:
Push( step );
break;
}
}
if (stack.Count != 1)
throw new RrdException("RPN error, invalid stack length");
return Pop();
}
internal double Evaluate( Cdef cdef, int row, long timestamp )
{
stack.Clear();
byte[] tokens = cdef.Tokens;
int[] dsIndices = cdef.DsIndices;
double[] constants = cdef.Constants;
Random autoRand = new Random();
double x1, x2, x3;
for ( int i = 0; i < tokens.Length; i++ )
{
switch ( tokens[i] )
{
case TKN_CONSTANT:
Push( constants[i] );
break;
case TKN_DATASOURCE:
Push( sources[ dsIndices[i] ].Get(row) );
break;
case TKN_PLUS:
Push(Pop() + Pop());
break;
case TKN_MINUS:
x2 = Pop();
x1 = Pop();
Push(x1 - x2);
break;
case TKN_MULTIPLY:
Push(Pop() * Pop());
break;
case TKN_DIVIDE:
x2 = Pop();
x1 = Pop();
Push(x1 / x2);
break;
case TKN_MOD:
x2 = Pop();
x1 = Pop();
Push(x1 % x2);
break;
case TKN_SIN:
Push(Math.Sin(Pop()));
break;
case TKN_COS:
Push(Math.Cos(Pop()));
break;
case TKN_LOG:
Push(Math.Log(Pop()));
break;
case TKN_EXP:
Push(Math.Exp(Pop()));
break;
case TKN_FLOOR:
Push(Math.Floor(Pop()));
break;
case TKN_CEIL:
Push(Math.Ceiling(Pop()));
break;
case TKN_ROUND:
Push(Math.Round(Pop(), MidpointRounding.AwayFromZero));
break;
case TKN_POW:
x2 = Pop();
x1 = Pop();
Push(Math.Pow(x1, x2));
break;
case TKN_ABS:
Push(Math.Abs(Pop()));
break;
case TKN_SQRT:
Push(Math.Sqrt(Pop()));
break;
case TKN_RANDOM:
Push(autoRand.Next());
break;
case TKN_LT:
x2 = Pop();
x1 = Pop();
Push(x1 < x2? 1: 0);
break;
case TKN_LE:
x2 = Pop();
x1 = Pop();
Push(x1 <= x2? 1: 0);
break;
case TKN_GT:
x2 = Pop();
x1 = Pop();
Push(x1 > x2? 1: 0);
break;
case TKN_GE:
x2 = Pop();
x1 = Pop();
Push(x1 >= x2? 1: 0);
break;
case TKN_EQ:
x2 = Pop();
x1 = Pop();
Push(x1 == x2? 1: 0);
break;
case TKN_IF:
x3 = Pop();
x2 = Pop();
x1 = Pop();
Push(x1 != 0 ? x2: x3);
break;
case TKN_MIN:
Push(Math.Min(Pop(), Pop()));
break;
case TKN_MAX:
Push(Math.Max(Pop(), Pop()));
break;
case TKN_LIMIT:
double high = Pop(), low = Pop(), val = Pop();
Push(val < low || val > high? Double.NaN: val);
break;
case TKN_DUP:
double x = Pop();
Push(x);
Push(x);
break;
case TKN_EXC:
x2 = Pop();
x1 = Pop();
Push(x2);
Push(x1);
break;
case TKN_POP:
Pop();
break;
case TKN_UN:
Push(Double.IsNaN(Pop())? 1: 0);
break;
case TKN_UNKN:
Push(Double.NaN);
break;
case TKN_NOW:
Push(Util.Time);
break;
case TKN_TIME:
Push(timestamp);
break;
case TKN_PI:
Push(Math.PI);
break;
case TKN_E:
Push(Math.E);
break;
case TKN_AND:
x2 = Pop();
x1 = Pop();
Push((x1 != 0 && x2 != 0)? 1: 0);
break;
case TKN_OR:
x2 = Pop();
x1 = Pop();
Push((x1 != 0 || x2 != 0)? 1: 0);
break;
case TKN_XOR:
x2 = Pop();
x1 = Pop();
Push(((x1 != 0 && x2 == 0) || (x1 == 0 && x2 != 0))? 1: 0);
break;
case TKN_SAMPLES:
Push (cdef.SampleCount);
break;
case TKN_STEP:
Push( step );
break;
case TKN_TREND:
double seconds = Pop();
double value = Pop();
double trend = Double.NaN;
// Is this the first value?
if (this.TrendWindowStart == 0)
this.TrendWindowStart = timestamp;
// Add new value
this.TrendValues.Add(value);
// To we have a full window?
if (timestamp >= this.TrendWindowStart + seconds)
{
//this.TrendWindowStart = timestamp;
double sum = 0;
// Sum up all values
for (int v = 0; v < this.TrendValues.Count; v++)
{
sum += this.TrendValues[v];
}
// Calc average, i.e. trend
trend = sum / this.TrendValues.Count;
// Remove oldest value
this.TrendValues.RemoveAt(0);
}
// Return the calculated point
Push(trend);
break;
}
}
if (stack.Count != 1)
throw new RrdException("RPN error, invalid stack length");
return Pop();
}
