split keyword arguments (#6)

src/CodecXz.jl

@@ -16,6 +16,16 @@ import TranscodingStreams:
     initialize,
     finalize
 
+# TODO: This method will be added in the next version of TranscodingStreams.jl.
+function splitkwargs(kwargs, keys)
+    hits = []
+    others = []
+    for kwarg in kwargs
+        push!(kwarg[1] ∈ keys ? hits : others, kwarg)
+    end
+    return hits, others
+end
+
 include("liblzma.jl")
 include("compression.jl")
 include("decompression.jl")

src/compression.jl

@@ -41,7 +41,8 @@ const XzCompressorStream{S} = TranscodingStream{XzCompressor,S} where S<:IO
 Create an xz compression stream (see `XzCompressor` for `kwargs`).
 """
 function XzCompressorStream(stream::IO; kwargs...)
-    return TranscodingStream(XzCompressor(;kwargs...), stream)
+    x, y = splitkwargs(kwargs, (:level, :check))
+    return TranscodingStream(XzCompressor(;x...), stream; y...)
 end
 
 

src/decompression.jl

@@ -39,7 +39,8 @@ const XzDecompressorStream{S} = TranscodingStream{XzDecompressor,S} where S<:IO
 Create an xz decompression stream (see `XzDecompressor` for `kwargs`).
 """
 function XzDecompressorStream(stream::IO; kwargs...)
-    return TranscodingStream(XzDecompressor(;kwargs...), stream)
+    x, y = splitkwargs(kwargs, (:memlimit, :flags))
+    return TranscodingStream(XzDecompressor(;x...), stream; y...)
 end