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streamers.jl
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streamers.jl
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struct StreamerInfo
streamer
dependencies
end
struct Streamers
tkey::TKey
refs::Dict{Int32, Any}
elements::Vector{StreamerInfo}
end
Base.length(s::Streamers) = length(s.elements)
function Base.show(io::IO, s::Streamers)
for streamer_info in s.elements
println(io, "$(streamer_info.streamer.fName)")
# streamer = streamer_info.streamer
# print(io, "$(streamer.fName): fType = $(streamer.fType), ")
# print(io, "fTypeName: $(streamer.fTypeName)")
end
end
# Structures required to read streamers
struct TStreamerInfo
fName
fTitle
fCheckSum
fClassVersion
fElements
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TStreamerInfo})
preamble = Preamble(io, T)
fName, fTitle = nametitle(io)
fCheckSum = readtype(io, UInt32)
fClassVersion = readtype(io, Int32)
fElements = readobjany!(io, tkey, refs)
endcheck(io, preamble)
T(fName, fTitle, fCheckSum, fClassVersion, fElements)
end
safename(s::AbstractString) = replace(s, "::" => "_3a3a_")
function initialise_streamer(s::StreamerInfo)
# FIXME Abstract is not needed when switched to autogenerated streamers
base = Symbol(safename(s.streamer.fName))
supername = Symbol(:Abstract, base)
if !isdefined(@__MODULE__, supername)
@debug "Defining abstract type $supername"
@eval abstract type $(supername) <: ROOTStreamedObject end
end
name = Symbol(base, Symbol("_$(s.streamer.fClassVersion)"))
if !isdefined(@__MODULE__, name)
@debug " creating versioned struct '$name <: $supername'"
@eval struct $(name) <: $(supername) end
# FIXME create the stream!() functions somewhere here...
# println(name)
# @eval struct $name <: ROOTStreamedObject
# data::Dict{Symbol, Any}
# end
else
@debug "Not defining $name since it already has a bootstrapped version"
end
end
"""
function Streamers(io)
Reads all the streamers from the ROOT source.
"""
function Streamers(io)
refs = Dict{Int32, Any}()
start = position(io)
tkey = unpack(io, TKey)
if iscompressed(tkey)
@debug "Compressed stream at $(start)"
seekstart(io, tkey)
compression_header = unpack(io, CompressionHeader)
if String(compression_header.algo) != "ZL"
error("Unsupported compression type '$(String(compression_header.algo))'")
end
stream = IOBuffer(read(ZlibDecompressorStream(io), tkey.fObjlen))
else
@debug "Unompressed stream at $(start)"
stream = io
end
preamble = Preamble(stream, Streamers)
skiptobj(stream)
name = readtype(stream, String)
size = readtype(stream, Int32)
streamer_infos = Vector{StreamerInfo}()
@debug "Found $size streamers, continue with parsing."
for i ∈ 1:size
obj = readobjany!(stream, tkey, refs)
if typeof(obj) == TStreamerInfo
@debug " processing streamer info for '$(obj.fName)' (v$(obj.fClassVersion))"
@debug " number of dependencies: $(length(obj.fElements.elements))"
dependencies = Set()
for element in obj.fElements.elements
if typeof(element) == TStreamerBase
@debug " + adding dependency '$(element.fName)'"
push!(dependencies, element.fName)
else
@debug " - skipping dependency '$(element.fName)' with type '$(typeof(element))'"
end
end
@debug " => finishing dependency readout for: $(obj.fName)"
push!(streamer_infos, StreamerInfo(obj, dependencies))
else
@debug " not a TStreamerInfo but '$(typeof(obj))', skipping."
end
# FIXME why not just skip a byte?
skip(stream, readtype(stream, UInt8))
end
endcheck(stream, preamble)
streamer_infos = topological_sort(streamer_infos)
for streamer_info in streamer_infos
initialise_streamer(streamer_info)
end
Streamers(tkey, refs, streamer_infos)
end
"""
function topological_sort(streamer_infos)
Sort the streamers with respect to their dependencies and keep only those
which are not defined already.
The implementation is based on https://stackoverflow.com/a/11564769/1623645
"""
function topological_sort(streamer_infos)
@debug "Starting topological sort of streamers"
provided = Set{String}()
sorted_streamer_infos = []
while length(streamer_infos) > 0
remaining_items = []
emitted = false
@debug " number of remaining streamers to sort: $(length(streamer_infos))"
for streamer_info in streamer_infos
# if all(d -> isdefined(@__MODULE__, Symbol(d)) || d ∈ provided, streamer_info.dependencies)
# if !isdefined(@__MODULE__, Symbol(streamer_info.streamer.fName)) && aliasfor(streamer_info.streamer.fName) === nothing
@debug " processing '$(streamer_info.streamer.fName)' with $(length(streamer_info.dependencies))' dependencies"
if length(streamer_infos) == 1 || all(d -> d ∈ provided, streamer_info.dependencies)
if aliasfor(streamer_info.streamer.fName) === nothing
push!(sorted_streamer_infos, streamer_info)
end
push!(provided, streamer_info.streamer.fName)
emitted = true
else
push!(remaining_items, streamer_info)
end
end
if !emitted
for streamer_info in streamer_infos
filter!(isequal(streamer_info), remaining_items)
end
end
streamer_infos = remaining_items
end
@debug "Finished the topological sort of streamers"
sorted_streamer_infos
end
"""
function readobjany!(io, tkey::TKey, refs)
The main entrypoint where streamers are parsed and cached for later use.
The `refs` dictionary holds the streamers or parsed data which are reused
when already available.
"""
function readobjany!(io, tkey::TKey, refs)
beg = position(io) - origin(tkey)
bcnt = readtype(io, UInt32)
if Int64(bcnt) & Const.kByteCountMask == 0 || Int64(bcnt) == Const.kNewClassTag
# New class or 0 bytes
version = 0
start = 0
tag = bcnt
bcnt = 0
else
version = 1
start = position(io) - origin(tkey)
tag = readtype(io, UInt32)
end
if Int64(tag) & Const.kClassMask == 0
# reference object
if tag == 0
return missing
elseif tag == 1
error("Returning parent is not implemented yet")
elseif !haskey(refs, tag)
# skipping
seek(io, origin(tkey) + beg + bcnt + 4)
return missing
else
return refs[tag]
end
elseif tag == Const.kNewClassTag
cname = readtype(io, CString)
streamer = getfield(@__MODULE__, Symbol(cname))
if version > 0
refs[start + Const.kMapOffset] = streamer
else
refs[length(refs) + 1] = streamer
end
obj = unpack(io, tkey, refs, streamer)
if version > 0
refs[beg + Const.kMapOffset] = obj
else
refs[length(refs) + 1] = obj
end
return obj
else
# reference class, new object
ref = Int64(tag) & ~Const.kClassMask
haskey(refs, ref) || error("Invalid class reference.")
streamer = refs[ref]
obj = unpack(io, tkey, refs, streamer)
if version > 0
refs[beg + Const.kMapOffset] = obj
else
refs[length(refs) + 1] = obj
end
return obj
end
end
struct TList
preamble
name
size
objects
end
Base.length(l::TList) = length(l.objects)
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TList})
preamble = Preamble(io, T)
skiptobj(io)
name = readtype(io, String)
size = readtype(io, Int32)
objects = []
for i ∈ 1:size
push!(objects, readobjany!(io, tkey, refs))
skip(io, readtype(io, UInt8))
end
endcheck(io, preamble)
TList(preamble, name, size, objects)
end
struct TObjArray
name
low
elements
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TObjArray})
preamble = Preamble(io, T)
skiptobj(io)
name = readtype(io, String)
size = readtype(io, Int32)
low = readtype(io, Int32)
elements = [readobjany!(io, tkey, refs) for i in 1:size]
endcheck(io, preamble)
return TObjArray(name, low, elements)
end
abstract type AbstractTStreamerElement end
@premix @with_kw mutable struct TStreamerElementTemplate
version
fOffset
fName
fTitle
fType
fSize
fArrayLength
fArrayDim
fMaxIndex
fTypeName
fXmin
fXmax
fFactor
end
@TStreamerElementTemplate mutable struct TStreamerElement end
@pour initparse begin
fields = Dict{Symbol, Any}()
end
function parsefields!(io, fields, T::Type{TStreamerElement})
preamble = Preamble(io, T)
fields[:version] = preamble.version
fields[:fOffset] = 0
fields[:fName], fields[:fTitle] = nametitle(io)
fields[:fType] = readtype(io, Int32)
fields[:fSize] = readtype(io, Int32)
fields[:fArrayLength] = readtype(io, Int32)
fields[:fArrayDim] = readtype(io, Int32)
n = preamble.version == 1 ? readtype(io, Int32) : 5
fields[:fMaxIndex] = [readtype(io, Int32) for _ in 1:n]
fields[:fTypeName] = readtype(io, String)
if fields[:fType] == 11 && (fields[:fTypeName] == "Bool_t" || fields[:fTypeName] == "bool")
fields[:fType] = 18
end
fields[:fXmin] = 0.0
fields[:fXmax] = 0.0
fields[:fFactor] = 0.0
if preamble.version == 3
fields[:fXmin] = readtype(io, Float64)
fields[:fXmax] = readtype(io, Float64)
fields[:fFactor] = readtype(io, Float64)
end
endcheck(io, preamble)
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TStreamerElement})
@initparse
parsefields!(io, fields, T)
T(;fields...)
end
@TStreamerElementTemplate mutable struct TStreamerBase
fBaseVersion
end
function parsefields!(io, fields, T::Type{TStreamerBase})
preamble = Preamble(io, T)
parsefields!(io, fields, TStreamerElement)
fields[:fBaseVersion] = fields[:version] >= 2 ? readtype(io, Int32) : 0
endcheck(io, preamble)
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TStreamerBase})
@initparse
parsefields!(io, fields, T)
T(;fields...)
end
@TStreamerElementTemplate mutable struct TStreamerBasicType end
function parsefields!(io, fields, ::Type{TStreamerBasicType})
parsefields!(io, fields, TStreamerElement)
if Const.kOffsetL < fields[:fType] < Const.kOffsetP
fields[:fType] -= Const.kOffsetP
end
basic = true
if fields[:fType] ∈ (Const.kBool, Const.kUChar, Const.kChar)
fields[:fSize] = 1
elseif fields[:fType] in (Const.kUShort, Const.kShort)
fields[:fSize] = 2
elseif fields[:fType] in (Const.kBits, Const.kUInt, Const.kInt, Const.kCounter)
fields[:fSize] = 4
elseif fields[:fType] in (Const.kULong, Const.kULong64, Const.kLong, Const.kLong64)
fields[:fSize] = 8
elseif fields[:fType] in (Const.kFloat, Const.kFloat16)
fields[:fSize] = 4
elseif fields[:fType] in (Const.kDouble, Const.kDouble32)
fields[:fSize] = 8
elseif fields[:fType] == Const.kCharStar
fields[:fSize] = sizeof(Int)
else
basic = false
end
if basic && fields[:fArrayLength] > 0
fields[:fSize] *= fields[:fArrayLength]
end
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TStreamerBasicType})
@initparse
preamble = Preamble(io, T)
parsefields!(io, fields, T)
endcheck(io, preamble)
T(;fields...)
end
@TStreamerElementTemplate mutable struct TStreamerBasicPointer
fCountVersion
fCountName
fCountClass
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TStreamerBasicPointer})
@initparse
preamble = Preamble(io, T)
parsefields!(io, fields, TStreamerElement)
fields[:fCountVersion] = readtype(io, Int32)
fields[:fCountName] = readtype(io, String)
fields[:fCountClass] = readtype(io, String)
endcheck(io, preamble)
T(;fields...)
end
@TStreamerElementTemplate mutable struct TStreamerLoop
fCountVersion
fCountName
fCountClass
end
components(::Type{TStreamerLoop}) = [TStreamerElement]
function parsefields!(io, fields, ::Type{TStreamerLoop})
fields[:fCountVersion] = readtype(io, Int32)
fields[:fCountName] = readtype(io, String)
fields[:fCountClass] = readtype(io, String)
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TStreamerLoop})
@initparse
preamble = Preamble(io, T)
for component in components(T)
parsefields!(io, fields, component)
end
parsefields!(io, fields, T)
endcheck(io, preamble)
T(;fields...)
end
abstract type AbstractTStreamSTL end
@TStreamerElementTemplate mutable struct TStreamerSTL <: AbstractTStreamSTL
fSTLtype
fCtype
end
@TStreamerElementTemplate mutable struct TStreamerSTLstring <: AbstractTStreamSTL
fSTLtype
fCtype
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, ::Type{T}) where T <: AbstractTStreamSTL
@initparse
if T == TStreamerSTLstring
wrapper_preamble = Preamble(io, T)
end
preamble = Preamble(io, T)
parsefields!(io, fields, TStreamerElement)
fields[:fSTLtype] = readtype(io, Int32)
fields[:fCtype] = readtype(io, Int32)
if fields[:fSTLtype] == Const.kSTLmultimap || fields[:fSTLtype] == Const.kSTLset
if startswith(fields[:fTypeName], "std::set") || startswith(fields[:fTypeName], "set")
fields[:fSTLtype] = Const.kSTLset
elseif startswith(fields[:fTypeName], "std::multimap") || startswith(fields[:fTypeName], "multimap")
fields[:fSTLtype] = Const.kSTLmultimap
end
end
endcheck(io, preamble)
if T == TStreamerSTLstring
endcheck(io, wrapper_preamble)
end
T(;fields...)
end
const TObjString = String
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{TObjString})
preamble = Preamble(io, T)
skiptobj(io)
value = readtype(io, String)
endcheck(io, preamble)
T(value)
end
abstract type AbstractTStreamerObject end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, ::Type{T}) where T<:AbstractTStreamerObject
@initparse
preamble = Preamble(io, T)
parsefields!(io, fields, TStreamerElement)
endcheck(io, preamble)
T(;fields...)
end
@TStreamerElementTemplate mutable struct TStreamerObject <: AbstractTStreamerObject end
@TStreamerElementTemplate mutable struct TStreamerObjectAny <: AbstractTStreamerObject end
@TStreamerElementTemplate mutable struct TStreamerObjectAnyPointer <: AbstractTStreamerObject end
@TStreamerElementTemplate mutable struct TStreamerObjectPointer <: AbstractTStreamerObject end
@TStreamerElementTemplate mutable struct TStreamerString <: AbstractTStreamerObject end
abstract type ROOTStreamedObject end
# function stream(io, ::Type{T}) where {T<:ROOTStreamedObject}
# fields = Dict{Symbol, Any}()
# preamble = Preamble(io, T)
# stream!(io, fields, T{preamble.version})
# endcheck(io, preamble)
# T(fields)
# end
function stream!(io, fields, ::Type{T}) where {T<:ROOTStreamedObject}
preamble = Preamble(io, T)
streamer_name = Symbol(T, "_$(preamble.version)")
# @show streamer_name
mod, typename = split(String(streamer_name), ".")
# @show mod typename
streamer = getfield(@__MODULE__, Symbol(typename))
# @show streamer
readfields!(io, fields, streamer)
endcheck(io, preamble)
end
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, ::Type{T}) where {T<:ROOTStreamedObject}
cursor = Cursor(position(io), io, tkey, refs)
@initparse
preamble = Preamble(io, T)
streamer_name = Symbol(T, "_$(preamble.version)")
mod, typename = split(String(streamer_name), ".")
streamer = getfield(@__MODULE__, Symbol(typename))
readfields!(cursor, fields, streamer)
streamer(;cursor=cursor, fields...)
end
# function stream!(io, fields, ::Type{T{V}}) where {V, T<:ROOTStreamedObject}
# println("Don't know how to stream $T")
# end
struct TObject <: ROOTStreamedObject end
parsefields!(io, fields, ::Type{TObject}) = skiptobj(io)
struct TString <: ROOTStreamedObject end
unpack(io, tkey::TKey, refs::Dict{Int32, Any}, ::Type{TString}) = readtype(io, String)
struct Undefined <: ROOTStreamedObject
skipped_bytes
end
Base.show(io::IO, u::Undefined) = print(io, "$(typeof(u)) ($(u.skipped_bytes) bytes)")
function unpack(io, tkey::TKey, refs::Dict{Int32, Any}, T::Type{Undefined})
preamble = Preamble(io, T)
bytes_to_skip = preamble.cnt - 6
skip(io, bytes_to_skip)
endcheck(io, preamble)
Undefined(bytes_to_skip)
end
const TArrayD = Vector{Float64}
const TArrayI = Vector{Int32}
function readtype(io, T::Type{Vector{U}}) where U <: Union{Integer, AbstractFloat}
size = readtype(io, eltype(T))
[readtype(io, eltype(T)) for _ in 1:size]
end