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annotate sbpD2.jl @ 68:d485da6e3a77 cell_based_test

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Make D2 more type stable
author Jonatan Werpers <jonatan@werpers.com>
date Thu, 17 Jan 2019 16:04:07 +0100
parents 27a8d3021a1c
children 4640839b1616 fbf7398f8154
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1 abstract type ConstantStencilOperator end
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2
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3 function apply(op::ConstantStencilOperator, h::Real, v::AbstractVector, i::Int)
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4 cSize = closureSize(op)
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5 N = length(v)
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6
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7 if i ∈ range(1; length=cSize)
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8 uᵢ = apply(op.closureStencils[i], v, i)/h^2
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9 elseif i ∈ range(N - cSize+1, length=cSize)
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10 uᵢ = Int(op.parity)*apply(flip(op.closureStencils[N-i+1]), v, i)/h^2
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11 else
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12 uᵢ = apply(op.innerStencil, v, i)/h^2
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13 end
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15 return uᵢ
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16 end
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18 @enum Parity begin
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19 odd = -1
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20 even = 1
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21 end
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23 struct D2{T} <: ConstantStencilOperator
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24 quadratureClosure::Vector{T}
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25 innerStencil::Stencil{T}
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26 closureStencils::Vector{Stencil{T}} # TBD: Should this be a tuple?
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27 eClosure::Vector{T}
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28 dClosure::Vector{T}
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29 parity::Parity
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30 end
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32 function closureSize(D::D2)::Int
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33 return length(D.quadratureClosure)
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34 end
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36 function readOperator(D2fn, Hfn)
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37 d = readSectionedFile(D2fn)
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38 h = readSectionedFile(Hfn)
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40 # Create inner stencil
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41 innerStencilWeights = stringToVector(Float64, d["inner_stencil"][1])
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42 width = length(innerStencilWeights)
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43 r = (-div(width,2), div(width,2))
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45 innerStencil = Stencil(r, innerStencilWeights)
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47 # Create boundary stencils
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48 boundarySize = length(d["boundary_stencils"])
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49 closureStencils = Vector{typeof(innerStencil)}() # TBD: is the the right way to get the correct type?
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51 for i ∈ 1:boundarySize
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52 stencilWeights = stringToVector(Float64, d["boundary_stencils"][i])
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53 width = length(stencilWeights)
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54 r = (1-i,width-i)
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55 push!(closureStencils,Stencil(r, stencilWeights))
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56 end
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58 d2 = D2(
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59 stringToVector(Float64, h["closure"][1]),
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60 innerStencil,
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61 closureStencils,
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62 stringToVector(Float64, d["e"][1]),
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63 stringToVector(Float64, d["d1"][1]),
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64 even
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65 )
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67 return d2
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68 end
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71 function readSectionedFile(filename)::Dict{String, Vector{String}}
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72 f = open(filename)
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73 sections = Dict{String, Vector{String}}()
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74 currentKey = ""
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76 for ln ∈ eachline(f)
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77 if ln == "" || ln[1] == '#' # Skip comments and empty lines
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78 continue
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79 end
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81 if isletter(ln[1]) # Found start of new section
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82 if ~haskey(sections, ln)
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83 sections[ln] = Vector{String}()
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84 end
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85 currentKey = ln
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86 continue
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87 end
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89 push!(sections[currentKey], ln)
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90 end
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92 return sections
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93 end
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94
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95 function stringToVector(T::DataType, s::String)
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96 return T.(eval.(Meta.parse.(split(s))))
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97 end