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add size methods #1

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add size methods #1

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8 changes: 8 additions & 0 deletions src/base64/decoder.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,14 @@ function Base64DecoderStream(stream::IO; kwargs...)
return TranscodingStream(Base64Decoder(;kwargs...), stream)
end

function TranscodingStreams.minoutsize(::Base64Decoder, ::Memory)
return 3
end

function TranscodingStreams.expectedsize(::Base64Decoder, input::Memory)
return cld(input.size, 4) * 3 + 3
end

function TranscodingStreams.startproc(
codec :: Base64Decoder,
state :: Symbol,
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9 changes: 9 additions & 0 deletions src/base64/encoder.jl
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Expand Up @@ -38,6 +38,14 @@ function Base64EncoderStream(stream::IO; kwargs...)
return TranscodingStream(Base64Encoder(;kwargs...), stream)
end

function TranscodingStreams.minoutsize(::Base64Encoder, ::Memory)
return 4
end

function TranscodingStreams.expectedsize(::Base64Encoder, input::Memory)
return cld(input.size, 3) * 4 + 4
end

function TranscodingStreams.startproc(
codec :: Base64Encoder,
state :: Symbol,
Expand All @@ -61,6 +69,7 @@ function TranscodingStreams.process(
error[] = ArgumentError("encoding is already finished")
return 0, 0, :error
elseif output.size < 4
@assert false
# Need more output space.
return 0, 0, :ok
end
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