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@ -61,12 +61,12 @@ SOFTWARE.
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-- global dependencies:
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local pairs, type, tostring, tonumber, getmetatable, setmetatable =
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pairs, type, tostring, tonumber, getmetatable, setmetatable
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pairs, type, tostring, tonumber, getmetatable, setmetatable
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local error, require, pcall, select = error, require, pcall, select
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local floor, huge = math.floor, math.huge
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local strrep, gsub, strsub, strbyte, strchar, strfind, strlen, strformat =
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string.rep, string.gsub, string.sub, string.byte, string.char,
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string.find, string.len, string.format
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string.rep, string.gsub, string.sub, string.byte, string.char,
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string.find, string.len, string.format
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local strmatch = string.match
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local concat = table.concat
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@ -93,23 +93,23 @@ json.null = setmetatable ({}, {
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local function isarray (tbl)
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local max, n, arraylen = 0, 0, 0
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for k,v in pairs (tbl) do
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if k == 'n' and type(v) == 'number' then
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arraylen = v
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if v > max then
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max = v
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end
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else
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if type(k) ~= 'number' or k < 1 or floor(k) ~= k then
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return false
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end
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if k > max then
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max = k
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end
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n = n + 1
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end
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if k == 'n' and type(v) == 'number' then
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arraylen = v
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if v > max then
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max = v
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end
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else
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if type(k) ~= 'number' or k < 1 or floor(k) ~= k then
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return false
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end
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if k > max then
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max = k
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end
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n = n + 1
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end
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end
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if max > 10 and max > arraylen and max > n * 2 then
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return false -- don't create an array with too many holes
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return false -- don't create an array with too many holes
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end
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return true, max
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end
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@ -122,30 +122,30 @@ local escapecodes = {
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local function escapeutf8 (uchar)
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local value = escapecodes[uchar]
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if value then
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return value
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return value
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end
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local a, b, c, d = strbyte (uchar, 1, 4)
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a, b, c, d = a or 0, b or 0, c or 0, d or 0
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if a <= 0x7f then
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value = a
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value = a
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elseif 0xc0 <= a and a <= 0xdf and b >= 0x80 then
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value = (a - 0xc0) * 0x40 + b - 0x80
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value = (a - 0xc0) * 0x40 + b - 0x80
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elseif 0xe0 <= a and a <= 0xef and b >= 0x80 and c >= 0x80 then
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value = ((a - 0xe0) * 0x40 + b - 0x80) * 0x40 + c - 0x80
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value = ((a - 0xe0) * 0x40 + b - 0x80) * 0x40 + c - 0x80
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elseif 0xf0 <= a and a <= 0xf7 and b >= 0x80 and c >= 0x80 and d >= 0x80 then
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value = (((a - 0xf0) * 0x40 + b - 0x80) * 0x40 + c - 0x80) * 0x40 + d - 0x80
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value = (((a - 0xf0) * 0x40 + b - 0x80) * 0x40 + c - 0x80) * 0x40 + d - 0x80
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else
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return ""
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return ""
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end
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if value <= 0xffff then
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return strformat ("\\u%.4x", value)
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return strformat ("\\u%.4x", value)
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elseif value <= 0x10ffff then
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-- encode as UTF-16 surrogate pair
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value = value - 0x10000
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local highsur, lowsur = 0xD800 + floor (value/0x400), 0xDC00 + (value % 0x400)
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return strformat ("\\u%.4x\\u%.4x", highsur, lowsur)
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-- encode as UTF-16 surrogate pair
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value = value - 0x10000
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local highsur, lowsur = 0xD800 + floor (value/0x400), 0xDC00 + (value % 0x400)
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return strformat ("\\u%.4x\\u%.4x", highsur, lowsur)
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else
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return ""
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return ""
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end
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end
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@ -154,9 +154,9 @@ local function fsub (str, pattern, repl)
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-- exists. First using find should be more efficient when most strings
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-- don't contain the pattern.
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if strfind (str, pattern) then
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return gsub (str, pattern, repl)
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return gsub (str, pattern, repl)
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else
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return str
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return str
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end
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end
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@ -164,14 +164,14 @@ local function quotestring (value)
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-- based on the regexp "escapable" in https://github.com/douglascrockford/JSON-js
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value = fsub (value, "[%z\1-\31\"\\\127]", escapeutf8)
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if strfind (value, "[\194\216\220\225\226\239]") then
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value = fsub (value, "\194[\128-\159\173]", escapeutf8)
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value = fsub (value, "\216[\128-\132]", escapeutf8)
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value = fsub (value, "\220\143", escapeutf8)
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value = fsub (value, "\225\158[\180\181]", escapeutf8)
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value = fsub (value, "\226\128[\140-\143\168-\175]", escapeutf8)
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value = fsub (value, "\226\129[\160-\175]", escapeutf8)
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value = fsub (value, "\239\187\191", escapeutf8)
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value = fsub (value, "\239\191[\176-\191]", escapeutf8)
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value = fsub (value, "\194[\128-\159\173]", escapeutf8)
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value = fsub (value, "\216[\128-\132]", escapeutf8)
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value = fsub (value, "\220\143", escapeutf8)
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value = fsub (value, "\225\158[\180\181]", escapeutf8)
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value = fsub (value, "\226\128[\140-\143\168-\175]", escapeutf8)
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value = fsub (value, "\226\129[\160-\175]", escapeutf8)
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value = fsub (value, "\239\187\191", escapeutf8)
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value = fsub (value, "\239\191[\176-\191]", escapeutf8)
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end
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return "\"" .. value .. "\""
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end
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@ -180,9 +180,9 @@ json.quotestring = quotestring
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local function replace(str, o, n)
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local i, j = strfind (str, o, 1, true)
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if i then
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return strsub(str, 1, i-1) .. n .. strsub(str, j+1, -1)
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return strsub(str, 1, i-1) .. n .. strsub(str, j+1, -1)
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else
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return str
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return str
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end
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end
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@ -204,8 +204,8 @@ end
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local function str2num (str)
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local num = tonumber(replace(str, ".", decpoint))
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if not num then
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updatedecpoint()
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num = tonumber(replace(str, ".", decpoint))
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updatedecpoint()
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num = tonumber(replace(str, ".", decpoint))
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end
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return num
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end
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@ -219,8 +219,8 @@ end
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function json.addnewline (state)
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if state.indent then
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state.bufferlen = addnewline2 (state.level or 0,
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state.buffer, state.bufferlen or #(state.buffer))
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state.bufferlen = addnewline2 (state.level or 0,
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state.buffer, state.bufferlen or #(state.buffer))
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end
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end
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@ -229,14 +229,14 @@ local encode2 -- forward declaration
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local function addpair (key, value, prev, indent, level, buffer, buflen, tables, globalorder, state)
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local kt = type (key)
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if kt ~= 'string' and kt ~= 'number' then
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return nil, "type '" .. kt .. "' is not supported as a key by JSON."
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return nil, "type '" .. kt .. "' is not supported as a key by JSON."
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end
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if prev then
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buflen = buflen + 1
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buffer[buflen] = ","
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buflen = buflen + 1
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buffer[buflen] = ","
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end
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if indent then
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buflen = addnewline2 (level, buffer, buflen)
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buflen = addnewline2 (level, buffer, buflen)
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end
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buffer[buflen+1] = quotestring (key)
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buffer[buflen+2] = ":"
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@ -246,8 +246,8 @@ end
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local function appendcustom(res, buffer, state)
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local buflen = state.bufferlen
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if type (res) == 'string' then
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buflen = buflen + 1
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buffer[buflen] = res
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buflen = buflen + 1
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buffer[buflen] = res
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end
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return buflen
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end
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@ -256,12 +256,12 @@ local function exception(reason, value, state, buffer, buflen, defaultmessage)
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defaultmessage = defaultmessage or reason
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local handler = state.exception
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if not handler then
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return nil, defaultmessage
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return nil, defaultmessage
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else
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state.bufferlen = buflen
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local ret, msg = handler (reason, value, state, defaultmessage)
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if not ret then return nil, msg or defaultmessage end
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return appendcustom(ret, buffer, state)
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state.bufferlen = buflen
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local ret, msg = handler (reason, value, state, defaultmessage)
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if not ret then return nil, msg or defaultmessage end
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return appendcustom(ret, buffer, state)
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end
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end
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@ -275,100 +275,100 @@ encode2 = function (value, indent, level, buffer, buflen, tables, globalorder, s
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valmeta = type (valmeta) == 'table' and valmeta -- only tables
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local valtojson = valmeta and valmeta.__tojson
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if valtojson then
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if tables[value] then
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return exception('reference cycle', value, state, buffer, buflen)
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end
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tables[value] = true
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state.bufferlen = buflen
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local ret, msg = valtojson (value, state)
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if not ret then return exception('custom encoder failed', value, state, buffer, buflen, msg) end
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tables[value] = nil
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buflen = appendcustom(ret, buffer, state)
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if tables[value] then
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return exception('reference cycle', value, state, buffer, buflen)
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end
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tables[value] = true
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state.bufferlen = buflen
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local ret, msg = valtojson (value, state)
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if not ret then return exception('custom encoder failed', value, state, buffer, buflen, msg) end
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tables[value] = nil
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buflen = appendcustom(ret, buffer, state)
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elseif value == nil then
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buflen = buflen + 1
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buffer[buflen] = "null"
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buflen = buflen + 1
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buffer[buflen] = "null"
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elseif valtype == 'number' then
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local s
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if value ~= value or value >= huge or -value >= huge then
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-- This is the behaviour of the original JSON implementation.
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s = "null"
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else
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s = num2str (value)
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end
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buflen = buflen + 1
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buffer[buflen] = s
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local s
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if value ~= value or value >= huge or -value >= huge then
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-- This is the behaviour of the original JSON implementation.
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s = "null"
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else
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s = num2str (value)
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end
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buflen = buflen + 1
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buffer[buflen] = s
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elseif valtype == 'boolean' then
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buflen = buflen + 1
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buffer[buflen] = value and "true" or "false"
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buflen = buflen + 1
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buffer[buflen] = value and "true" or "false"
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elseif valtype == 'string' then
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buflen = buflen + 1
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buffer[buflen] = quotestring (value)
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buflen = buflen + 1
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buffer[buflen] = quotestring (value)
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elseif valtype == 'table' then
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if tables[value] then
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return exception('reference cycle', value, state, buffer, buflen)
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end
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tables[value] = true
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level = level + 1
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local isa, n = isarray (value)
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if n == 0 and valmeta and valmeta.__jsontype == 'object' then
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isa = false
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end
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local msg
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if isa then -- JSON array
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buflen = buflen + 1
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buffer[buflen] = "["
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for i = 1, n do
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buflen, msg = encode2 (value[i], indent, level, buffer, buflen, tables, globalorder, state)
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if not buflen then return nil, msg end
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if i < n then
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buflen = buflen + 1
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buffer[buflen] = ","
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end
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end
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buflen = buflen + 1
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buffer[buflen] = "]"
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else -- JSON object
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local prev = false
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buflen = buflen + 1
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buffer[buflen] = "{"
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local order = valmeta and valmeta.__jsonorder or globalorder
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if order then
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local used = {}
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n = #order
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for i = 1, n do
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local k = order[i]
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local v = value[k]
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local _
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if v then
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|
|
|
|
used[k] = true
|
|
|
|
|
buflen, _ = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
prev = true -- add a seperator before the next element
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
for k,v in pairs (value) do
|
|
|
|
|
if not used[k] then
|
|
|
|
|
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
if not buflen then return nil, msg end
|
|
|
|
|
prev = true -- add a seperator before the next element
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
else -- unordered
|
|
|
|
|
for k,v in pairs (value) do
|
|
|
|
|
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
if not buflen then return nil, msg end
|
|
|
|
|
prev = true -- add a seperator before the next element
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
if indent then
|
|
|
|
|
buflen = addnewline2 (level - 1, buffer, buflen)
|
|
|
|
|
end
|
|
|
|
|
buflen = buflen + 1
|
|
|
|
|
buffer[buflen] = "}"
|
|
|
|
|
end
|
|
|
|
|
tables[value] = nil
|
|
|
|
|
if tables[value] then
|
|
|
|
|
return exception('reference cycle', value, state, buffer, buflen)
|
|
|
|
|
end
|
|
|
|
|
tables[value] = true
|
|
|
|
|
level = level + 1
|
|
|
|
|
local isa, n = isarray (value)
|
|
|
|
|
if n == 0 and valmeta and valmeta.__jsontype == 'object' then
|
|
|
|
|
isa = false
|
|
|
|
|
end
|
|
|
|
|
local msg
|
|
|
|
|
if isa then -- JSON array
|
|
|
|
|
buflen = buflen + 1
|
|
|
|
|
buffer[buflen] = "["
|
|
|
|
|
for i = 1, n do
|
|
|
|
|
buflen, msg = encode2 (value[i], indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
if not buflen then return nil, msg end
|
|
|
|
|
if i < n then
|
|
|
|
|
buflen = buflen + 1
|
|
|
|
|
buffer[buflen] = ","
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
buflen = buflen + 1
|
|
|
|
|
buffer[buflen] = "]"
|
|
|
|
|
else -- JSON object
|
|
|
|
|
local prev = false
|
|
|
|
|
buflen = buflen + 1
|
|
|
|
|
buffer[buflen] = "{"
|
|
|
|
|
local order = valmeta and valmeta.__jsonorder or globalorder
|
|
|
|
|
if order then
|
|
|
|
|
local used = {}
|
|
|
|
|
n = #order
|
|
|
|
|
for i = 1, n do
|
|
|
|
|
local k = order[i]
|
|
|
|
|
local v = value[k]
|
|
|
|
|
local _
|
|
|
|
|
if v then
|
|
|
|
|
used[k] = true
|
|
|
|
|
buflen, _ = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
prev = true -- add a seperator before the next element
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
for k,v in pairs (value) do
|
|
|
|
|
if not used[k] then
|
|
|
|
|
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
if not buflen then return nil, msg end
|
|
|
|
|
prev = true -- add a seperator before the next element
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
else -- unordered
|
|
|
|
|
for k,v in pairs (value) do
|
|
|
|
|
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
|
|
|
|
|
if not buflen then return nil, msg end
|
|
|
|
|
prev = true -- add a seperator before the next element
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
if indent then
|
|
|
|
|
buflen = addnewline2 (level - 1, buffer, buflen)
|
|
|
|
|
end
|
|
|
|
|
buflen = buflen + 1
|
|
|
|
|
buffer[buflen] = "}"
|
|
|
|
|
end
|
|
|
|
|
tables[value] = nil
|
|
|
|
|
else
|
|
|
|
|
return exception ('unsupported type', value, state, buffer, buflen,
|
|
|
|
|
"type '" .. valtype .. "' is not supported by JSON.")
|
|
|
|
|
return exception ('unsupported type', value, state, buffer, buflen,
|
|
|
|
|
"type '" .. valtype .. "' is not supported by JSON.")
|
|
|
|
|
end
|
|
|
|
|
return buflen
|
|
|
|
|
end
|
|
|
|
@ -380,30 +380,30 @@ function json.encode (value, state)
|
|
|
|
|
state.buffer = buffer
|
|
|
|
|
updatedecpoint()
|
|
|
|
|
local ret, msg = encode2 (value, state.indent, state.level or 0,
|
|
|
|
|
buffer, state.bufferlen or 0, state.tables or {}, state.keyorder, state)
|
|
|
|
|
buffer, state.bufferlen or 0, state.tables or {}, state.keyorder, state)
|
|
|
|
|
if not ret then
|
|
|
|
|
error (msg, 2)
|
|
|
|
|
error (msg, 2)
|
|
|
|
|
elseif oldbuffer == buffer then
|
|
|
|
|
state.bufferlen = ret
|
|
|
|
|
return true
|
|
|
|
|
state.bufferlen = ret
|
|
|
|
|
return true
|
|
|
|
|
else
|
|
|
|
|
state.bufferlen = nil
|
|
|
|
|
state.buffer = nil
|
|
|
|
|
return concat (buffer)
|
|
|
|
|
state.bufferlen = nil
|
|
|
|
|
state.buffer = nil
|
|
|
|
|
return concat (buffer)
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
|
|
|
|
|
local function loc (str, where)
|
|
|
|
|
local line, pos, linepos = 1, 1, 0
|
|
|
|
|
while true do
|
|
|
|
|
pos = strfind (str, "\n", pos, true)
|
|
|
|
|
if pos and pos < where then
|
|
|
|
|
line = line + 1
|
|
|
|
|
linepos = pos
|
|
|
|
|
pos = pos + 1
|
|
|
|
|
else
|
|
|
|
|
break
|
|
|
|
|
end
|
|
|
|
|
pos = strfind (str, "\n", pos, true)
|
|
|
|
|
if pos and pos < where then
|
|
|
|
|
line = line + 1
|
|
|
|
|
linepos = pos
|
|
|
|
|
pos = pos + 1
|
|
|
|
|
else
|
|
|
|
|
break
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
return "line " .. line .. ", column " .. (where - linepos)
|
|
|
|
|
end
|
|
|
|
@ -414,22 +414,22 @@ end
|
|
|
|
|
|
|
|
|
|
local function scanwhite (str, pos)
|
|
|
|
|
while true do
|
|
|
|
|
pos = strfind (str, "%S", pos)
|
|
|
|
|
if not pos then return nil end
|
|
|
|
|
local sub2 = strsub (str, pos, pos + 1)
|
|
|
|
|
if sub2 == "\239\187" and strsub (str, pos + 2, pos + 2) == "\191" then
|
|
|
|
|
-- UTF-8 Byte Order Mark
|
|
|
|
|
pos = pos + 3
|
|
|
|
|
elseif sub2 == "//" then
|
|
|
|
|
pos = strfind (str, "[\n\r]", pos + 2)
|
|
|
|
|
if not pos then return nil end
|
|
|
|
|
elseif sub2 == "/*" then
|
|
|
|
|
pos = strfind (str, "*/", pos + 2)
|
|
|
|
|
if not pos then return nil end
|
|
|
|
|
pos = pos + 2
|
|
|
|
|
else
|
|
|
|
|
return pos
|
|
|
|
|
end
|
|
|
|
|
pos = strfind (str, "%S", pos)
|
|
|
|
|
if not pos then return nil end
|
|
|
|
|
local sub2 = strsub (str, pos, pos + 1)
|
|
|
|
|
if sub2 == "\239\187" and strsub (str, pos + 2, pos + 2) == "\191" then
|
|
|
|
|
-- UTF-8 Byte Order Mark
|
|
|
|
|
pos = pos + 3
|
|
|
|
|
elseif sub2 == "//" then
|
|
|
|
|
pos = strfind (str, "[\n\r]", pos + 2)
|
|
|
|
|
if not pos then return nil end
|
|
|
|
|
elseif sub2 == "/*" then
|
|
|
|
|
pos = strfind (str, "*/", pos + 2)
|
|
|
|
|
if not pos then return nil end
|
|
|
|
|
pos = pos + 2
|
|
|
|
|
else
|
|
|
|
|
return pos
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
|
|
|
|
@ -440,23 +440,23 @@ local escapechars = {
|
|
|
|
|
|
|
|
|
|
local function unichar (value)
|
|
|
|
|
if value < 0 then
|
|
|
|
|
return nil
|
|
|
|
|
return nil
|
|
|
|
|
elseif value <= 0x007f then
|
|
|
|
|
return strchar (value)
|
|
|
|
|
return strchar (value)
|
|
|
|
|
elseif value <= 0x07ff then
|
|
|
|
|
return strchar (0xc0 + floor(value/0x40),
|
|
|
|
|
0x80 + (floor(value) % 0x40))
|
|
|
|
|
return strchar (0xc0 + floor(value/0x40),
|
|
|
|
|
0x80 + (floor(value) % 0x40))
|
|
|
|
|
elseif value <= 0xffff then
|
|
|
|
|
return strchar (0xe0 + floor(value/0x1000),
|
|
|
|
|
0x80 + (floor(value/0x40) % 0x40),
|
|
|
|
|
0x80 + (floor(value) % 0x40))
|
|
|
|
|
return strchar (0xe0 + floor(value/0x1000),
|
|
|
|
|
0x80 + (floor(value/0x40) % 0x40),
|
|
|
|
|
0x80 + (floor(value) % 0x40))
|
|
|
|
|
elseif value <= 0x10ffff then
|
|
|
|
|
return strchar (0xf0 + floor(value/0x40000),
|
|
|
|
|
0x80 + (floor(value/0x1000) % 0x40),
|
|
|
|
|
0x80 + (floor(value/0x40) % 0x40),
|
|
|
|
|
0x80 + (floor(value) % 0x40))
|
|
|
|
|
return strchar (0xf0 + floor(value/0x40000),
|
|
|
|
|
0x80 + (floor(value/0x1000) % 0x40),
|
|
|
|
|
0x80 + (floor(value/0x40) % 0x40),
|
|
|
|
|
0x80 + (floor(value) % 0x40))
|
|
|
|
|
else
|
|
|
|
|
return nil
|
|
|
|
|
return nil
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
|
|
|
|
@ -464,60 +464,60 @@ local function scanstring (str, pos)
|
|
|
|
|
local lastpos = pos + 1
|
|
|
|
|
local buffer, n = {}, 0
|
|
|
|
|
while true do
|
|
|
|
|
local nextpos = strfind (str, "[\"\\]", lastpos)
|
|
|
|
|
if not nextpos then
|
|
|
|
|
return unterminated (str, "string", pos)
|
|
|
|
|
end
|
|
|
|
|
if nextpos > lastpos then
|
|
|
|
|
n = n + 1
|
|
|
|
|
buffer[n] = strsub (str, lastpos, nextpos - 1)
|
|
|
|
|
end
|
|
|
|
|
if strsub (str, nextpos, nextpos) == "\"" then
|
|
|
|
|
lastpos = nextpos + 1
|
|
|
|
|
break
|
|
|
|
|
else
|
|
|
|
|
local escchar = strsub (str, nextpos + 1, nextpos + 1)
|
|
|
|
|
local value
|
|
|
|
|
if escchar == "u" then
|
|
|
|
|
value = tonumber (strsub (str, nextpos + 2, nextpos + 5), 16)
|
|
|
|
|
if value then
|
|
|
|
|
local value2
|
|
|
|
|
if 0xD800 <= value and value <= 0xDBff then
|
|
|
|
|
-- we have the high surrogate of UTF-16. Check if there is a
|
|
|
|
|
-- low surrogate escaped nearby to combine them.
|
|
|
|
|
if strsub (str, nextpos + 6, nextpos + 7) == "\\u" then
|
|
|
|
|
value2 = tonumber (strsub (str, nextpos + 8, nextpos + 11), 16)
|
|
|
|
|
if value2 and 0xDC00 <= value2 and value2 <= 0xDFFF then
|
|
|
|
|
value = (value - 0xD800) * 0x400 + (value2 - 0xDC00) + 0x10000
|
|
|
|
|
else
|
|
|
|
|
value2 = nil -- in case it was out of range for a low surrogate
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
value = value and unichar (value)
|
|
|
|
|
if value then
|
|
|
|
|
if value2 then
|
|
|
|
|
lastpos = nextpos + 12
|
|
|
|
|
else
|
|
|
|
|
lastpos = nextpos + 6
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
if not value then
|
|
|
|
|
value = escapechars[escchar] or escchar
|
|
|
|
|
lastpos = nextpos + 2
|
|
|
|
|
end
|
|
|
|
|
n = n + 1
|
|
|
|
|
buffer[n] = value
|
|
|
|
|
end
|
|
|
|
|
local nextpos = strfind (str, "[\"\\]", lastpos)
|
|
|
|
|
if not nextpos then
|
|
|
|
|
return unterminated (str, "string", pos)
|
|
|
|
|
end
|
|
|
|
|
if nextpos > lastpos then
|
|
|
|
|
n = n + 1
|
|
|
|
|
buffer[n] = strsub (str, lastpos, nextpos - 1)
|
|
|
|
|
end
|
|
|
|
|
if strsub (str, nextpos, nextpos) == "\"" then
|
|
|
|
|
lastpos = nextpos + 1
|
|
|
|
|
break
|
|
|
|
|
else
|
|
|
|
|
local escchar = strsub (str, nextpos + 1, nextpos + 1)
|
|
|
|
|
local value
|
|
|
|
|
if escchar == "u" then
|
|
|
|
|
value = tonumber (strsub (str, nextpos + 2, nextpos + 5), 16)
|
|
|
|
|
if value then
|
|
|
|
|
local value2
|
|
|
|
|
if 0xD800 <= value and value <= 0xDBff then
|
|
|
|
|
-- we have the high surrogate of UTF-16. Check if there is a
|
|
|
|
|
-- low surrogate escaped nearby to combine them.
|
|
|
|
|
if strsub (str, nextpos + 6, nextpos + 7) == "\\u" then
|
|
|
|
|
value2 = tonumber (strsub (str, nextpos + 8, nextpos + 11), 16)
|
|
|
|
|
if value2 and 0xDC00 <= value2 and value2 <= 0xDFFF then
|
|
|
|
|
value = (value - 0xD800) * 0x400 + (value2 - 0xDC00) + 0x10000
|
|
|
|
|
else
|
|
|
|
|
value2 = nil -- in case it was out of range for a low surrogate
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
value = value and unichar (value)
|
|
|
|
|
if value then
|
|
|
|
|
if value2 then
|
|
|
|
|
lastpos = nextpos + 12
|
|
|
|
|
else
|
|
|
|
|
lastpos = nextpos + 6
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
if not value then
|
|
|
|
|
value = escapechars[escchar] or escchar
|
|
|
|
|
lastpos = nextpos + 2
|
|
|
|
|
end
|
|
|
|
|
n = n + 1
|
|
|
|
|
buffer[n] = value
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
if n == 1 then
|
|
|
|
|
return buffer[1], lastpos
|
|
|
|
|
return buffer[1], lastpos
|
|
|
|
|
elseif n > 1 then
|
|
|
|
|
return concat (buffer), lastpos
|
|
|
|
|
return concat (buffer), lastpos
|
|
|
|
|
else
|
|
|
|
|
return "", lastpos
|
|
|
|
|
return "", lastpos
|
|
|
|
|
end
|
|
|
|
|
end
|
|
|
|
|
|
|
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@ -527,43 +527,43 @@ local function scantable (what, closechar, str, startpos, nullval, objectmeta, a
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local tbl, n = {}, 0
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local pos = startpos + 1
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if what == 'object' then
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setmetatable (tbl, objectmeta)
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setmetatable (tbl, objectmeta)
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else
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setmetatable (tbl, arraymeta)
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setmetatable (tbl, arraymeta)
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end
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while true do
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pos = scanwhite (str, pos)
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if not pos then return unterminated (str, what, startpos) end
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local char = strsub (str, pos, pos)
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if char == closechar then
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return tbl, pos + 1
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end
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local val1, err
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val1, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta)
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if err then return nil, pos, err end
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pos = scanwhite (str, pos)
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if not pos then return unterminated (str, what, startpos) end
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char = strsub (str, pos, pos)
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if char == ":" then
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if val1 == nil then
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return nil, pos, "cannot use nil as table index (at " .. loc (str, pos) .. ")"
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end
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pos = scanwhite (str, pos + 1)
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if not pos then return unterminated (str, what, startpos) end
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local val2
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val2, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta)
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if err then return nil, pos, err end
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tbl[val1] = val2
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pos = scanwhite (str, pos)
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if not pos then return unterminated (str, what, startpos) end
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char = strsub (str, pos, pos)
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else
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n = n + 1
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tbl[n] = val1
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end
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if char == "," then
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pos = pos + 1
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end
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pos = scanwhite (str, pos)
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if not pos then return unterminated (str, what, startpos) end
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local char = strsub (str, pos, pos)
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if char == closechar then
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return tbl, pos + 1
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end
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local val1, err
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val1, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta)
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if err then return nil, pos, err end
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pos = scanwhite (str, pos)
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if not pos then return unterminated (str, what, startpos) end
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char = strsub (str, pos, pos)
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if char == ":" then
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if val1 == nil then
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return nil, pos, "cannot use nil as table index (at " .. loc (str, pos) .. ")"
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end
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pos = scanwhite (str, pos + 1)
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if not pos then return unterminated (str, what, startpos) end
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local val2
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val2, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta)
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if err then return nil, pos, err end
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tbl[val1] = val2
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pos = scanwhite (str, pos)
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if not pos then return unterminated (str, what, startpos) end
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char = strsub (str, pos, pos)
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else
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n = n + 1
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tbl[n] = val1
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end
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if char == "," then
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pos = pos + 1
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end
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end
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end
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@ -571,43 +571,43 @@ scanvalue = function (str, pos, nullval, objectmeta, arraymeta)
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pos = pos or 1
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pos = scanwhite (str, pos)
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if not pos then
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return nil, strlen (str) + 1, "no valid JSON value (reached the end)"
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return nil, strlen (str) + 1, "no valid JSON value (reached the end)"
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end
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local char = strsub (str, pos, pos)
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if char == "{" then
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return scantable ('object', "}", str, pos, nullval, objectmeta, arraymeta)
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return scantable ('object', "}", str, pos, nullval, objectmeta, arraymeta)
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elseif char == "[" then
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return scantable ('array', "]", str, pos, nullval, objectmeta, arraymeta)
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return scantable ('array', "]", str, pos, nullval, objectmeta, arraymeta)
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elseif char == "\"" then
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return scanstring (str, pos)
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return scanstring (str, pos)
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else
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local pstart, pend = strfind (str, "^%-?[%d%.]+[eE]?[%+%-]?%d*", pos)
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if pstart then
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local number = str2num (strsub (str, pstart, pend))
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if number then
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return number, pend + 1
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end
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end
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pstart, pend = strfind (str, "^%a%w*", pos)
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if pstart then
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local name = strsub (str, pstart, pend)
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if name == "true" then
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return true, pend + 1
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elseif name == "false" then
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return false, pend + 1
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elseif name == "null" then
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return nullval, pend + 1
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end
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end
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return nil, pos, "no valid JSON value at " .. loc (str, pos)
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local pstart, pend = strfind (str, "^%-?[%d%.]+[eE]?[%+%-]?%d*", pos)
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if pstart then
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local number = str2num (strsub (str, pstart, pend))
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if number then
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return number, pend + 1
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end
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end
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pstart, pend = strfind (str, "^%a%w*", pos)
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if pstart then
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local name = strsub (str, pstart, pend)
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if name == "true" then
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return true, pend + 1
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elseif name == "false" then
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return false, pend + 1
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elseif name == "null" then
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return nullval, pend + 1
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end
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end
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return nil, pos, "no valid JSON value at " .. loc (str, pos)
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end
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end
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local function optionalmetatables(...)
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if select("#", ...) > 0 then
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return ...
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return ...
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else
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return {__jsontype = 'object'}, {__jsontype = 'array'}
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return {__jsontype = 'object'}, {__jsontype = 'array'}
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end
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end
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@ -620,22 +620,22 @@ function json.use_lpeg ()
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local g = require ("lpeg")
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if g.version() == "0.11" then
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error "due to a bug in LPeg 0.11, it cannot be used for JSON matching"
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error "due to a bug in LPeg 0.11, it cannot be used for JSON matching"
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end
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local pegmatch = g.match
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local P, S, R = g.P, g.S, g.R
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local function ErrorCall (str, pos, msg, state)
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if not state.msg then
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state.msg = msg .. " at " .. loc (str, pos)
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state.pos = pos
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end
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return false
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if not state.msg then
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state.msg = msg .. " at " .. loc (str, pos)
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state.pos = pos
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end
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return false
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end
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local function Err (msg)
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return g.Cmt (g.Cc (msg) * g.Carg (2), ErrorCall)
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return g.Cmt (g.Cc (msg) * g.Carg (2), ErrorCall)
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end
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local SingleLineComment = P"//" * (1 - S"\n\r")^0
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@ -646,15 +646,15 @@ function json.use_lpeg ()
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local EscapeSequence = (P"\\" * g.C (S"\"\\/bfnrt" + Err "unsupported escape sequence")) / escapechars
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local HexDigit = R("09", "af", "AF")
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local function UTF16Surrogate (match, pos, high, low)
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high, low = tonumber (high, 16), tonumber (low, 16)
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if 0xD800 <= high and high <= 0xDBff and 0xDC00 <= low and low <= 0xDFFF then
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return true, unichar ((high - 0xD800) * 0x400 + (low - 0xDC00) + 0x10000)
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else
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return false
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end
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high, low = tonumber (high, 16), tonumber (low, 16)
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if 0xD800 <= high and high <= 0xDBff and 0xDC00 <= low and low <= 0xDFFF then
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return true, unichar ((high - 0xD800) * 0x400 + (low - 0xDC00) + 0x10000)
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else
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return false
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end
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end
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local function UTF16BMP (hex)
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return unichar (tonumber (hex, 16))
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return unichar (tonumber (hex, 16))
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end
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local U16Sequence = (P"\\u" * g.C (HexDigit * HexDigit * HexDigit * HexDigit))
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local UnicodeEscape = g.Cmt (U16Sequence * U16Sequence, UTF16Surrogate) + U16Sequence/UTF16BMP
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@ -671,30 +671,30 @@ function json.use_lpeg ()
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-- The functions parsearray and parseobject parse only a single value/pair
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-- at a time and store them directly to avoid hitting the LPeg limits.
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local function parsearray (str, pos, nullval, state)
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local obj, cont
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local npos
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local t, nt = {}, 0
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repeat
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obj, cont, npos = pegmatch (ArrayContent, str, pos, nullval, state)
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if not npos then break end
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pos = npos
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nt = nt + 1
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t[nt] = obj
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until cont == 'last'
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return pos, setmetatable (t, state.arraymeta)
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local obj, cont
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local npos
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local t, nt = {}, 0
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repeat
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obj, cont, npos = pegmatch (ArrayContent, str, pos, nullval, state)
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if not npos then break end
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pos = npos
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nt = nt + 1
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t[nt] = obj
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until cont == 'last'
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return pos, setmetatable (t, state.arraymeta)
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end
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local function parseobject (str, pos, nullval, state)
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local obj, key, cont
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local npos
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local t = {}
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repeat
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key, obj, cont, npos = pegmatch (ObjectContent, str, pos, nullval, state)
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if not npos then break end
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pos = npos
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t[key] = obj
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until cont == 'last'
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return pos, setmetatable (t, state.objectmeta)
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local obj, key, cont
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local npos
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local t = {}
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repeat
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key, obj, cont, npos = pegmatch (ObjectContent, str, pos, nullval, state)
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if not npos then break end
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pos = npos
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t[key] = obj
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until cont == 'last'
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return pos, setmetatable (t, state.objectmeta)
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end
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local Array = P"[" * g.Cmt (g.Carg(1) * g.Carg(2), parsearray) * Space * (P"]" + Err "']' expected")
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@ -707,14 +707,14 @@ function json.use_lpeg ()
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local DecodeValue = ExpectedValue * g.Cp ()
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function json.decode (str, pos, nullval, ...)
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local state = {}
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state.objectmeta, state.arraymeta = optionalmetatables(...)
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local obj, retpos = pegmatch (DecodeValue, str, pos, nullval, state)
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if state.msg then
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return nil, state.pos, state.msg
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else
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return obj, retpos
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end
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local state = {}
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state.objectmeta, state.arraymeta = optionalmetatables(...)
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local obj, retpos = pegmatch (DecodeValue, str, pos, nullval, state)
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if state.msg then
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return nil, state.pos, state.msg
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else
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return obj, retpos
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end
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end
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-- use this function only once:
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