module Database.RRDtool
( DataSource(..)
+ , MentionedVars(..)
+ , ApplyMentionedVarsOf(..)
+
, Expr
, CommonExpr
, IterativeExpr
, CommonExprSet
, Constant(..)
+ , VarName(..)
, Variable(..)
+ , VariableSet
, CommonUnaryOp(..)
, CommonBinaryOp(..)
, CommonTrinaryOp(..)
, CommonSetOp(..)
+ , TrendOp(..)
, VariableShiftPredictOp(..)
, FixedShiftPredictOp(..)
+ , CommonValue(..)
, IterativeValue(..)
+ , IterativeValueOf(..)
, AggregativeUnaryOp(..)
, createRRD
dsName = "foo"
-- , dsExpr = Previous :<: Const 100
-- , dsExpr = Var "foo" :<: Const 100
- , dsExpr = Average (Const 100 .*. Const 200 .*. HNil)
+ , dsExpr = AverageOf (Const 100 .*. Const 200 .*. HNil)
}
+-- MentionedVars
+class VariableSet (MentionedVarsOf a) => MentionedVars a where
+ type MentionedVarsOf a
+
+-- ApplyMentionedVarsOf
+data ApplyMentionedVarsOf = ApplyMentionedVarsOf
+
+instance Applyable ApplyMentionedVarsOf a where
+ type Apply ApplyMentionedVarsOf a = MentionedVarsOf a
+ apply = undefined
+
+-- Expr
class (Show e, Eq e) => Expr e
class Expr e => CommonExpr e
class Expr e => IterativeExpr e
class Expr e => AggregativeExpr e
instance CommonExpr e => IterativeExpr e
-instance CommonExpr e => AggregativeExpr e
class (Show es, Eq es, HList es) => ExprSet es
instance ExprSet HNil
-instance (Expr e, ExprSet es) => ExprSet (HCons e es)
+instance (Expr e, ExprSet es) => ExprSet (e :*: es)
class (Show es, Eq es, HList es) => CommonExprSet es
instance CommonExprSet es => ExprSet es
instance CommonExprSet HNil
-instance (CommonExpr e, CommonExprSet es) => CommonExprSet (HCons e es)
+instance (CommonExpr e, CommonExprSet es) => CommonExprSet (e :*: es)
-- Constants and variable names
deriving (Show, Eq, Ord)
instance Expr Constant
instance CommonExpr Constant
+instance MentionedVars Constant where
+ type MentionedVarsOf Constant = HNil
+
+class (Show a, Eq a, Ord a) => VarName a where
+ varName :: a -> String
-data Variable
- = Var !String
+data Variable vn
+ = Variable !vn
deriving (Show, Eq, Ord)
-instance Expr Variable
-instance CommonExpr Variable
+
+instance VarName vn => Expr (Variable vn)
+instance VarName vn => CommonExpr (Variable vn)
+instance VarName vn => MentionedVars (Variable vn) where
+ type MentionedVarsOf (Variable vn) = vn :*: HNil
+
+class HList vs => VariableSet vs
+instance VariableSet HNil
+instance (VarName v, VariableSet vs) => VariableSet (v :*: vs)
-- Common operators
data CommonUnaryOp a
| Deg2Rad !a
| Rad2Deg !a
| Abs !a
- | Trend !Variable !a
- | TrendNan !Variable !a
deriving (Show, Eq, Ord)
instance Expr a => Expr (CommonUnaryOp a)
instance CommonExpr a => CommonExpr (CommonUnaryOp a)
+instance VariableSet (MentionedVarsOf a) => MentionedVars (CommonUnaryOp a) where
+ type MentionedVarsOf (CommonUnaryOp a) = MentionedVarsOf a
data CommonBinaryOp a b
= !a :<: !b
| AddNaN !a !b
| AtanXY !a !b
deriving (Show, Eq, Ord)
-instance (Expr a, Expr b)
- => Expr (CommonBinaryOp a b)
-instance (CommonExpr a, CommonExpr b)
- => CommonExpr (CommonBinaryOp a b)
+
+instance (Expr a, Expr b) =>
+ Expr (CommonBinaryOp a b)
+
+instance (CommonExpr a, CommonExpr b) =>
+ CommonExpr (CommonBinaryOp a b)
+
+instance VariableSet (MentionedVarsOf a :++: MentionedVarsOf b) =>
+ MentionedVars (CommonBinaryOp a b) where
+ type MentionedVarsOf (CommonBinaryOp a b)
+ = MentionedVarsOf a :++: MentionedVarsOf b
+
data CommonTrinaryOp a b c
= If !a !b !c
| Limit !a !b !c
deriving (Show, Eq, Ord)
+
instance (Expr a, Expr b, Expr c)
=> Expr (CommonTrinaryOp a b c)
+
instance (CommonExpr a, CommonExpr b, CommonExpr c)
=> CommonExpr (CommonTrinaryOp a b c)
+instance VariableSet (MentionedVarsOf a :++:
+ MentionedVarsOf b :++:
+ MentionedVarsOf c) =>
+ MentionedVars (CommonTrinaryOp a b c) where
+ type MentionedVarsOf (CommonTrinaryOp a b c)
+ = MentionedVarsOf a :++:
+ MentionedVarsOf b :++:
+ MentionedVarsOf c
+
-- SORT and REV can't be expressed in this way as they pushes possibly
-- multiple values onto the stack...
data CommonSetOp es
- = Average !es
+ = AverageOf !es
deriving (Show, Eq, Ord)
+
instance ExprSet es => Expr (CommonSetOp es)
instance CommonExprSet es => CommonExpr (CommonSetOp es)
+instance VariableSet (HConcat (HMap ApplyMentionedVarsOf es)) =>
+ MentionedVars (CommonSetOp es) where
+ type MentionedVarsOf (CommonSetOp es)
+ = HConcat (HMap ApplyMentionedVarsOf es)
+
+data TrendOp vn a
+ = Trend !(Variable vn) !a
+ | TrendNan !(Variable vn) !a
+ deriving (Show, Eq, Ord)
+instance (VarName vn, Expr a) => Expr (TrendOp vn a)
+instance (VarName vn, CommonExpr a) => CommonExpr (TrendOp vn a)
+instance (VarName vn, MentionedVars a) => MentionedVars (TrendOp vn a) where
+ type MentionedVarsOf (TrendOp vn a) = vn :*: MentionedVarsOf a
+
+data VariableShiftPredictOp ss w vn
+ = VariableShiftPredictAverage !ss !w !(Variable vn)
+ | VariableShiftPredictSigma !ss !w !(Variable vn)
+ deriving (Show, Eq, Ord)
+instance (ExprSet ss, Expr w, VarName vn)
+ => Expr (VariableShiftPredictOp ss w vn)
+instance (CommonExprSet ss, CommonExpr w, VarName vn)
+ => CommonExpr (VariableShiftPredictOp ss w vn)
+instance ( VarName vn
+ , VariableSet (MentionedVarsOf ss :++: MentionedVarsOf w)
+ ) => MentionedVars (VariableShiftPredictOp ss w vn) where
+ type MentionedVarsOf (VariableShiftPredictOp ss w vn)
+ = vn :*: (MentionedVarsOf ss :++: MentionedVarsOf w)
-data VariableShiftPredictOp ss w
- = VariableShiftPredictAverage !ss !w !Variable
- | VariableShiftPredictSigma !ss !w !Variable
+-- FixedShiftPredictOp
+data FixedShiftPredictOp sm w vn
+ = FixedShiftPredictAverage !sm !w !(Variable vn)
+ | FixedShiftPredictSigma !sm !w !(Variable vn)
deriving (Show, Eq, Ord)
-instance (ExprSet ss, Expr w)
- => Expr (VariableShiftPredictOp ss w)
-instance (CommonExprSet ss, CommonExpr w)
- => CommonExpr (VariableShiftPredictOp ss w)
-
-data FixedShiftPredictOp sm w
- = FixedShiftPredictAverage !sm !w !Variable
- | FixedShiftPredictSigma !sm !w !Variable
+
+instance (Expr sm, Expr w, VarName vn)
+ => Expr (FixedShiftPredictOp sm w vn)
+
+instance (CommonExpr sm, CommonExpr w, VarName vn)
+ => CommonExpr (FixedShiftPredictOp sm w vn)
+
+instance ( VarName vn
+ , VariableSet (MentionedVarsOf sm :++: MentionedVarsOf w)
+ ) => MentionedVars (FixedShiftPredictOp sm w vn) where
+ type MentionedVarsOf (FixedShiftPredictOp sm w vn)
+ = vn :*: (MentionedVarsOf sm :++: MentionedVarsOf w)
+
+-- Common special values
+data CommonValue
+ = Unknown
+ | Infinity
+ | NegativeInfinity
+ | Now
deriving (Show, Eq, Ord)
-instance (Expr sm, Expr w)
- => Expr (FixedShiftPredictOp sm w)
-instance (CommonExpr sm, CommonExpr w)
- => CommonExpr (FixedShiftPredictOp sm w)
+
+instance Expr CommonValue
+
+instance CommonExpr CommonValue
+
+instance MentionedVars CommonValue where
+ type MentionedVarsOf CommonValue = HNil
-- Iterative special values
data IterativeValue
= Previous
+ | Count
+ | TakenTime
+ | TakenLocalTime
deriving (Show, Eq, Ord)
+
instance Expr IterativeValue
+
instance IterativeExpr IterativeValue
--- Aggregative operators
-data AggregativeUnaryOp a
- = Maximum !a
+instance MentionedVars IterativeValue where
+ type MentionedVarsOf IterativeValue = HNil
+
+-- Iterative special values of something
+data IterativeValueOf vn
+ = PreviousOf !(Variable vn)
deriving (Show, Eq, Ord)
-instance Expr a => Expr (AggregativeUnaryOp a)
-instance AggregativeExpr a => AggregativeExpr (AggregativeUnaryOp a)
+
+instance VarName vn => Expr (IterativeValueOf vn)
+
+instance VarName vn => IterativeExpr (IterativeValueOf vn)
+
+instance VarName vn => MentionedVars (IterativeValueOf vn) where
+ type MentionedVarsOf (IterativeValueOf vn) = vn :*: HNil
+
+-- Aggregative operators (fairly restricted due to rrdtool's
+-- restriction)
+data AggregativeUnaryOp vn
+ = Maximum !(Variable vn)
+ | Minimum !(Variable vn)
+ | Average !(Variable vn)
+ | StandardDeviation !(Variable vn)
+ | First !(Variable vn)
+ | Last !(Variable vn)
+ | Total !(Variable vn)
+ | Percent !(Variable vn) !Constant
+ | PercentNan !(Variable vn) !Constant
+ | LSLSlope !(Variable vn)
+ | LSLInt !(Variable vn)
+ | LSLCorrel !(Variable vn)
+ deriving (Show, Eq, Ord)
+
+instance VarName vn => Expr (AggregativeUnaryOp vn)
+
+instance VarName vn => AggregativeExpr (AggregativeUnaryOp vn)
+
+instance VarName vn => MentionedVars (AggregativeUnaryOp vn) where
+ type MentionedVarsOf (AggregativeUnaryOp vn) = vn :*: HNil
-- |The 'createRRD' function lets you set up new Round Robin Database
-- (RRD) files. The file is created at its final, full size and filled
projects / hs-rrdtool.git / blobdiff