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Add append as a keyword argument to save #64

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Add append as a keyword argument to save #64

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4f43573
Add append kwarg
pearlzli Sep 27, 2019
ee2a3d7
Fix ternary operator bug
pearlzli Sep 29, 2019
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43 changes: 23 additions & 20 deletions src/csv_writer.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ end
end
end

function _save(io, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true)
function _save(io, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true, append=false)
isiterabletable(data) || error("Can't write this data to a CSV file.")

it = getiterator(data)
Expand All @@ -62,38 +62,40 @@ function _save(io, data; delim=',', quotechar='"', escapechar='"', nastring="NA"
_writecsv(io, it, eltype(it), delim, quotechar, escapechar, nastring)
end

function _save(filename::AbstractString, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true)
function _save(filename::AbstractString, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true, append=false)
isiterabletable(data) || error("Can't write this data to a CSV file.")

ext = last(split(filename, '.'))

if ext == "gz" # Gzipped
append && error("Appending to gzipped CSV file not supported.")
open(GzipCompressorStream, filename, "w") do io
_save(io, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
end
else
open(filename, "w") do io
mode = append ? "a" : "w"
open(filename, mode) do io
_save(io, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
end
end
end



function fileio_save(f::FileIO.File{FileIO.format"CSV"}, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true)
return _save(f.filename, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
function fileio_save(f::FileIO.File{FileIO.format"CSV"}, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true, append=false)
return _save(f.filename, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header, append=append)
end

function fileio_save(f::FileIO.File{FileIO.format"TSV"}, data; delim='\t', quotechar='"', escapechar='"', nastring="NA", header=true)
return _save(f.filename, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
function fileio_save(f::FileIO.File{FileIO.format"TSV"}, data; delim='\t', quotechar='"', escapechar='"', nastring="NA", header=true, append=false)
return _save(f.filename, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header, append=append)
end

function fileio_save(s::FileIO.Stream{FileIO.format"CSV"}, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true)
return _save(s.io, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
function fileio_save(s::FileIO.Stream{FileIO.format"CSV"}, data; delim=',', quotechar='"', escapechar='"', nastring="NA", header=true, append=false)
return _save(s.io, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header, append=append)
end

function fileio_save(s::FileIO.Stream{FileIO.format"TSV"}, data; delim='\t', quotechar='"', escapechar='"', nastring="NA", header=true)
return _save(s.io, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
function fileio_save(s::FileIO.Stream{FileIO.format"TSV"}, data; delim='\t', quotechar='"', escapechar='"', nastring="NA", header=true, append=false)
return _save(s.io, data, delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header, append=append)
end

#
Expand All @@ -112,25 +114,26 @@ mutable struct CSVFileSaveStream{T}
nastring::AbstractString
header::Bool
end

function fileio_savestreaming(f::FileIO.File{T}, data=nothing; delim=_delim(T), quotechar='"', escapechar='"', nastring="NA",
header=true) where T <: CSV_or_TSV
io = open(f.filename, "w")

function fileio_savestreaming(f::FileIO.File{T}, data=nothing; delim=_delim(T), quotechar='"', escapechar='"', nastring="NA",
header=true, append=false) where T <: CSV_or_TSV
mode = append ? "a" : "w"
io = open(f.filename, mode)

if data!==nothing
_save(io, data; delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
_save(io, data; delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header, append=append)
end

return CSVFileSaveStream(io, data!==nothing, delim, quotechar, escapechar, nastring, header)
end

function fileio_savestreaming(s::FileIO.Stream{T}, data=nothing; delim=_delim(T), quotechar='"', escapechar='"', nastring="NA",
header=false) where T <: CSV_or_TSV
function fileio_savestreaming(s::FileIO.Stream{T}, data=nothing; delim=_delim(T), quotechar='"', escapechar='"', nastring="NA",
header=false, append=false) where T <: CSV_or_TSV

if data!==nothing
_save(s.io, data; delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header)
_save(s.io, data; delim=delim, quotechar=quotechar, escapechar=escapechar, nastring=nastring, header=header, append=append)
end

return CSVFileSaveStream(s.io, data!==nothing, delim, quotechar, escapechar, nastring, header)
end

Expand Down