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77
tools/luajson/json/encode/object.lua
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77
tools/luajson/json/encode/object.lua
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--[[
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Licensed according to the included 'LICENSE' document
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Author: Thomas Harning Jr <harningt@gmail.com>
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]]
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local pairs = pairs
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local assert = assert
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local type = type
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local tostring = tostring
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local table_concat = require("table").concat
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local jsonutil = require("json.util")
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local _ENV = nil
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local defaultOptions = {
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}
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local modeOptions = {}
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local function mergeOptions(options, mode)
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jsonutil.doOptionMerge(options, false, 'object', defaultOptions, mode and modeOptions[mode])
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end
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--[[
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Cleanup function to unmark a value as in the encoding process and return
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trailing results
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]]
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local function unmarkAfterEncode(tab, state, ...)
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state.already_encoded[tab] = nil
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return ...
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end
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--[[
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Encode a table as a JSON Object ( keys = strings, values = anything else )
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]]
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local function encodeTable(tab, options, state)
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-- Make sure this value hasn't been encoded yet
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state.check_unique(tab)
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local encode = state.encode
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local compositeEncoder = state.outputEncoder.composite
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local valueEncoder = [[
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local first = true
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for k, v in pairs(composite) do
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local ti = type(k)
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assert(ti == 'string' or ti == 'number' or ti == 'boolean', "Invalid object index type: " .. ti)
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local name = encode(tostring(k), state, true)
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if first then
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first = false
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else
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name = ',' .. name
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end
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PUTVALUE(name .. ':')
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local val = encode(v, state)
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val = val or ''
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if val then
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PUTVALUE(val)
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end
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end
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]]
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return unmarkAfterEncode(tab, state, compositeEncoder(valueEncoder, '{', '}', nil, tab, encode, state))
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end
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local function getEncoder(options)
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options = options and jsonutil.merge({}, defaultOptions, options) or defaultOptions
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return {
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table = function(tab, state)
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return encodeTable(tab, options, state)
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end
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}
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end
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local object = {
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mergeOptions = mergeOptions,
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getEncoder = getEncoder
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}
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return object
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