foundryvtt-swade-fr/tools/luajson/json/encode/output.lua

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2022-05-28 09:30:19 +02:00
--[[
Licensed according to the included 'LICENSE' document
Author: Thomas Harning Jr <harningt@gmail.com>
]]
local type = type
local assert, error = assert, error
local table_concat = require("table").concat
local loadstring = loadstring or load
local io = require("io")
local setmetatable = setmetatable
local output_utility = require("json.encode.output_utility")
local _ENV = nil
local tableCompositeCache = setmetatable({}, {__mode = 'v'})
local TABLE_VALUE_WRITER = [[
ret[#ret + 1] = %VALUE%
]]
local TABLE_INNER_WRITER = ""
--[[
nextValues can output a max of two values to throw into the data stream
expected to be called until nil is first return value
value separator should either be attached to v1 or in innerValue
]]
local function defaultTableCompositeWriter(nextValues, beginValue, closeValue, innerValue, composite, encode, state)
if type(nextValues) == 'string' then
local fun = output_utility.prepareEncoder(defaultTableCompositeWriter, nextValues, innerValue, TABLE_VALUE_WRITER, TABLE_INNER_WRITER)
local ret = {}
fun(composite, ret, encode, state)
return beginValue .. table_concat(ret, innerValue) .. closeValue
end
end
-- no 'simple' as default action is just to return the value
local function getDefault()
return { composite = defaultTableCompositeWriter }
end
-- BEGIN IO-WRITER OUTPUT
local IO_INNER_WRITER = [[
if %WRITE_INNER% then
state.__outputFile:write(%INNER_VALUE%)
end
]]
local IO_VALUE_WRITER = [[
state.__outputFile:write(%VALUE%)
]]
local function buildIoWriter(output)
if not output then -- Default to stdout
output = io.output()
end
local function ioWriter(nextValues, beginValue, closeValue, innerValue, composite, encode, state)
-- HOOK OUTPUT STATE
state.__outputFile = output
if type(nextValues) == 'string' then
local fun = output_utility.prepareEncoder(ioWriter, nextValues, innerValue, IO_VALUE_WRITER, IO_INNER_WRITER)
local ret = {}
output:write(beginValue)
fun(composite, ret, encode, state)
output:write(closeValue)
return nil
end
end
local function ioSimpleWriter(encoded)
if encoded then
output:write(encoded)
end
return nil
end
return { composite = ioWriter, simple = ioSimpleWriter }
end
local function getIoWriter(output)
return function()
return buildIoWriter(output)
end
end
local output = {
getDefault = getDefault,
getIoWriter = getIoWriter
}
return output