96 lines
2.7 KiB
Julia
96 lines
2.7 KiB
Julia
# This file is a part of Julia. License is MIT: https://julialang.org/license
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# deep copying
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# Note: deepcopy_internal(::Any, ::ObjectIdDict) is
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# only exposed for specialization by libraries
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deepcopy(x) = deepcopy_internal(x, ObjectIdDict())::typeof(x)
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deepcopy_internal(x::Union{Symbol,Core.MethodInstance,Method,GlobalRef,DataType,Union,Task},
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stackdict::ObjectIdDict) = x
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deepcopy_internal(x::Tuple, stackdict::ObjectIdDict) =
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ntuple(i->deepcopy_internal(x[i], stackdict), length(x))
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deepcopy_internal(x::Module, stackdict::ObjectIdDict) = error("deepcopy of Modules not supported")
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function deepcopy_internal(x::SimpleVector, stackdict::ObjectIdDict)
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if haskey(stackdict, x)
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return stackdict[x]
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end
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y = Core.svec(Any[deepcopy_internal(x[i], stackdict) for i = 1:length(x)]...)
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stackdict[x] = y
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return y
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end
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function deepcopy_internal(x::String, stackdict::ObjectIdDict)
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if haskey(stackdict, x)
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return stackdict[x]
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end
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y = unsafe_string(pointer(x), sizeof(x))
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stackdict[x] = y
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return y
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end
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function deepcopy_internal(x::ANY, stackdict::ObjectIdDict)
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T = typeof(x)::DataType
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nf = nfields(T)
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(isbits(T) || nf == 0) && return x
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if haskey(stackdict, x)
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return stackdict[x]
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end
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y = ccall(:jl_new_struct_uninit, Any, (Any,), T)
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if T.mutable
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stackdict[x] = y
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end
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for i in 1:nf
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if isdefined(x,i)
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ccall(:jl_set_nth_field, Void, (Any, Csize_t, Any), y, i-1,
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deepcopy_internal(getfield(x,i), stackdict))
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end
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end
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return y::T
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end
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function deepcopy_internal(x::Array, stackdict::ObjectIdDict)
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if haskey(stackdict, x)
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return stackdict[x]
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end
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_deepcopy_array_t(x, eltype(x), stackdict)
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end
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function _deepcopy_array_t(x::ANY, T, stackdict::ObjectIdDict)
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if isbits(T)
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return (stackdict[x]=copy(x))
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end
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dest = similar(x)
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stackdict[x] = dest
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for i = 1:(length(x)::Int)
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if ccall(:jl_array_isassigned, Cint, (Any, Csize_t), x, i-1) != 0
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xi = ccall(:jl_arrayref, Any, (Any, Csize_t), x, i-1)
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if !isbits(typeof(xi))
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xi = deepcopy_internal(xi, stackdict)
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end
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ccall(:jl_arrayset, Void, (Any, Any, Csize_t), dest, xi, i-1)
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end
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end
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return dest
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end
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function deepcopy_internal(x::Dict, stackdict::ObjectIdDict)
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if haskey(stackdict, x)
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return stackdict[x]::typeof(x)
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end
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if isbits(eltype(x))
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return (stackdict[x] = copy(x))
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end
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dest = similar(x)
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stackdict[x] = dest
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for (k, v) in x
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dest[deepcopy_internal(k, stackdict)] = deepcopy_internal(v, stackdict)
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end
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dest
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end
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