minetest_x_bows/bin/lua-language-server-3.5.6-l.../script/json.lua

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2022-11-03 10:37:33 -05:00
local type = type
local next = next
local error = error
local tonumber = tonumber
local tostring = tostring
local utf8_char = utf8.char
local table_concat = table.concat
local table_sort = table.sort
local string_char = string.char
local string_byte = string.byte
local string_find = string.find
local string_match = string.match
local string_gsub = string.gsub
local string_sub = string.sub
local string_format = string.format
local math_type = math.type
local setmetatable = setmetatable
local getmetatable = getmetatable
local huge = math.huge
local tiny = -huge
local json = {}
json.object = {}
json.supportSparseArray = true
-- json.encode --
local statusVisited
local statusBuilder
local encode_map = {}
local encode_escape_map = {
[ "\"" ] = "\\\"",
[ "\\" ] = "\\\\",
[ "/" ] = "\\/",
[ "\b" ] = "\\b",
[ "\f" ] = "\\f",
[ "\n" ] = "\\n",
[ "\r" ] = "\\r",
[ "\t" ] = "\\t",
}
local decode_escape_set = {}
local decode_escape_map = {}
for k, v in next, encode_escape_map do
decode_escape_map[v] = k
decode_escape_set[string_byte(v, 2)] = true
end
for i = 0, 31 do
local c = string_char(i)
if not encode_escape_map[c] then
encode_escape_map[c] = string_format("\\u%04x", i)
end
end
local function encode(v)
local res = encode_map[type(v)](v)
statusBuilder[#statusBuilder+1] = res
end
encode_map["nil"] = function ()
return "null"
end
local function encode_string(v)
return string_gsub(v, '[\0-\31\\"]', encode_escape_map)
end
function encode_map.string(v)
statusBuilder[#statusBuilder+1] = '"'
statusBuilder[#statusBuilder+1] = encode_string(v)
return '"'
end
local function convertreal(v)
local g = string_format('%.16g', v)
if tonumber(g) == v then
return g
end
return string_format('%.17g', v)
end
if string_match(tostring(1/2), "%p") == "," then
local _convertreal = convertreal
function convertreal(v)
return string_gsub(_convertreal(v), ',', '.')
end
end
function encode_map.number(v)
if v ~= v or v <= tiny or v >= huge then
error("unexpected number value '" .. tostring(v) .. "'")
end
return convertreal(v)
end
function encode_map.boolean(v)
if v then
return "true"
else
return "false"
end
end
function encode_map.table(t)
local first_val = next(t)
if first_val == nil then
if getmetatable(t) == json.object then
return "{}"
else
return "[]"
end
end
if statusVisited[t] then
error("circular reference")
end
statusVisited[t] = true
if type(first_val) == 'string' then
local keys = {}
for k in next, t do
if type(k) ~= "string" then
error("invalid table: mixed or invalid key types")
end
keys[#keys+1] = k
end
table_sort(keys)
local k = keys[1]
statusBuilder[#statusBuilder+1] = '{"'
statusBuilder[#statusBuilder+1] = encode_string(k)
statusBuilder[#statusBuilder+1] = '":'
encode(t[k])
for i = 2, #keys do
local k = keys[i]
statusBuilder[#statusBuilder+1] = ',"'
statusBuilder[#statusBuilder+1] = encode_string(k)
statusBuilder[#statusBuilder+1] = '":'
encode(t[k])
end
statusVisited[t] = nil
return "}"
else
local count = 0
local max = 0
for k in next, t do
if math_type(k) ~= "integer" or k <= 0 then
error("invalid table: mixed or invalid key types")
end
count = count + 1
if max < k then
max = k
end
end
if not json.supportSparseArray and count ~= max then
error("sparse array are not supported")
end
statusBuilder[#statusBuilder+1] = "["
encode(t[1])
for i = 2, max do
statusBuilder[#statusBuilder+1] = ","
encode(t[i])
end
statusVisited[t] = nil
return "]"
end
end
local function encode_unexpected(v)
if v == json.null then
return "null"
else
error("unexpected type '"..type(v).."'")
end
end
encode_map[ "function" ] = encode_unexpected
encode_map[ "userdata" ] = encode_unexpected
encode_map[ "thread" ] = encode_unexpected
function json.encode(v)
statusVisited = {}
statusBuilder = {}
encode(v)
return table_concat(statusBuilder)
end
json._encode_map = encode_map
json._encode_string = encode_string
-- json.decode --
local statusBuf
local statusPos
local statusTop
local statusAry = {}
local statusRef = {}
local function find_line()
local line = 1
local pos = 1
while true do
local f, _, nl1, nl2 = string_find(statusBuf, '([\n\r])([\n\r]?)', pos)
if not f then
return line, statusPos - pos + 1
end
local newpos = f + ((nl1 == nl2 or nl2 == '') and 1 or 2)
if newpos > statusPos then
return line, statusPos - pos + 1
end
pos = newpos
line = line + 1
end
end
local function decode_error(msg)
error(string_format("ERROR: %s at line %d col %d", msg, find_line()))
end
local function get_word()
return string_match(statusBuf, "^[^ \t\r\n%]},]*", statusPos)
end
local function next_byte()
local pos = string_find(statusBuf, "[^ \t\r\n]", statusPos)
if pos then
statusPos = pos
return string_byte(statusBuf, pos)
end
return -1
end
local function consume_byte(c)
local _, pos = string_find(statusBuf, c, statusPos)
if pos then
statusPos = pos + 1
return true
end
end
local function expect_byte(c)
local _, pos = string_find(statusBuf, c, statusPos)
if not pos then
decode_error(string_format("expected '%s'", string_sub(c, #c)))
end
statusPos = pos
end
local function decode_unicode_surrogate(s1, s2)
return utf8_char(0x10000 + (tonumber(s1, 16) - 0xd800) * 0x400 + (tonumber(s2, 16) - 0xdc00))
end
local function decode_unicode_escape(s)
return utf8_char(tonumber(s, 16))
end
local function decode_string()
local has_unicode_escape = false
local has_escape = false
local i = statusPos + 1
while true do
i = string_find(statusBuf, '["\\\0-\31]', i)
if not i then
decode_error "expected closing quote for string"
end
local x = string_byte(statusBuf, i)
if x < 32 then
statusPos = i
decode_error "control character in string"
end
if x == 34 --[[ '"' ]] then
local s = string_sub(statusBuf, statusPos + 1, i - 1)
if has_unicode_escape then
s = string_gsub(string_gsub(s
, "\\u([dD][89aAbB]%x%x)\\u([dD][c-fC-F]%x%x)", decode_unicode_surrogate)
, "\\u(%x%x%x%x)", decode_unicode_escape)
end
if has_escape then
s = string_gsub(s, "\\.", decode_escape_map)
end
statusPos = i + 1
return s
end
--assert(x == 92 --[[ "\\" ]])
local nx = string_byte(statusBuf, i+1)
if nx == 117 --[[ "u" ]] then
if not string_match(statusBuf, "^%x%x%x%x", i+2) then
statusPos = i
decode_error "invalid unicode escape in string"
end
has_unicode_escape = true
i = i + 6
else
if not decode_escape_set[nx] then
statusPos = i
decode_error("invalid escape char '" .. (nx and string_char(nx) or "<eol>") .. "' in string")
end
has_escape = true
i = i + 2
end
end
end
local function decode_number()
local num, c = string_match(statusBuf, '^([0-9]+%.?[0-9]*)([eE]?)', statusPos)
if not num or string_byte(num, -1) == 0x2E --[[ "." ]] then
decode_error("invalid number '" .. get_word() .. "'")
end
if c ~= '' then
num = string_match(statusBuf, '^([^eE]*[eE][-+]?[0-9]+)[ \t\r\n%]},]', statusPos)
if not num then
decode_error("invalid number '" .. get_word() .. "'")
end
end
statusPos = statusPos + #num
return tonumber(num)
end
local function decode_number_zero()
local num, c = string_match(statusBuf, '^(.%.?[0-9]*)([eE]?)', statusPos)
if not num or string_byte(num, -1) == 0x2E --[[ "." ]] or string_match(statusBuf, '^.[0-9]+', statusPos) then
decode_error("invalid number '" .. get_word() .. "'")
end
if c ~= '' then
num = string_match(statusBuf, '^([^eE]*[eE][-+]?[0-9]+)[ \t\r\n%]},]', statusPos)
if not num then
decode_error("invalid number '" .. get_word() .. "'")
end
end
statusPos = statusPos + #num
return tonumber(num)
end
local function decode_number_negative()
statusPos = statusPos + 1
local c = string_byte(statusBuf, statusPos)
if c then
if c == 0x30 then
return -decode_number_zero()
elseif c > 0x30 and c < 0x3A then
return -decode_number()
end
end
decode_error("invalid number '" .. get_word() .. "'")
end
local function decode_true()
if string_sub(statusBuf, statusPos, statusPos+3) ~= "true" then
decode_error("invalid literal '" .. get_word() .. "'")
end
statusPos = statusPos + 4
return true
end
local function decode_false()
if string_sub(statusBuf, statusPos, statusPos+4) ~= "false" then
decode_error("invalid literal '" .. get_word() .. "'")
end
statusPos = statusPos + 5
return false
end
local function decode_null()
if string_sub(statusBuf, statusPos, statusPos+3) ~= "null" then
decode_error("invalid literal '" .. get_word() .. "'")
end
statusPos = statusPos + 4
return json.null
end
local function decode_array()
statusPos = statusPos + 1
local res = {}
if consume_byte "^[ \t\r\n]*%]" then
return res
end
statusTop = statusTop + 1
statusAry[statusTop] = true
statusRef[statusTop] = res
return res
end
local function decode_object()
statusPos = statusPos + 1
local res = {}
if consume_byte "^[ \t\r\n]*}" then
return setmetatable(res, json.object)
end
statusTop = statusTop + 1
statusAry[statusTop] = false
statusRef[statusTop] = res
return res
end
local decode_uncompleted_map = {
[ string_byte '"' ] = decode_string,
[ string_byte "0" ] = decode_number_zero,
[ string_byte "1" ] = decode_number,
[ string_byte "2" ] = decode_number,
[ string_byte "3" ] = decode_number,
[ string_byte "4" ] = decode_number,
[ string_byte "5" ] = decode_number,
[ string_byte "6" ] = decode_number,
[ string_byte "7" ] = decode_number,
[ string_byte "8" ] = decode_number,
[ string_byte "9" ] = decode_number,
[ string_byte "-" ] = decode_number_negative,
[ string_byte "t" ] = decode_true,
[ string_byte "f" ] = decode_false,
[ string_byte "n" ] = decode_null,
[ string_byte "[" ] = decode_array,
[ string_byte "{" ] = decode_object,
}
local function unexpected_character()
decode_error("unexpected character '" .. string_sub(statusBuf, statusPos, statusPos) .. "'")
end
local function unexpected_eol()
decode_error("unexpected character '<eol>'")
end
local decode_map = {}
for i = 0, 255 do
decode_map[i] = decode_uncompleted_map[i] or unexpected_character
end
decode_map[-1] = unexpected_eol
local function decode()
return decode_map[next_byte()]()
end
local function decode_item()
local top = statusTop
local ref = statusRef[top]
if statusAry[top] then
ref[#ref+1] = decode()
else
expect_byte '^[ \t\r\n]*"'
local key = decode_string()
expect_byte '^[ \t\r\n]*:'
statusPos = statusPos + 1
ref[key] = decode()
end
if top == statusTop then
repeat
local chr = next_byte(); statusPos = statusPos + 1
if chr == 44 --[[ "," ]] then
return
end
if statusAry[statusTop] then
if chr ~= 93 --[[ "]" ]] then decode_error "expected ']' or ','" end
else
if chr ~= 125 --[[ "}" ]] then decode_error "expected '}' or ','" end
end
statusTop = statusTop - 1
until statusTop == 0
end
end
function json.decode(str)
if type(str) ~= "string" then
error("expected argument of type string, got " .. type(str))
end
statusBuf = str
statusPos = 1
statusTop = 0
local res = decode()
while statusTop > 0 do
decode_item()
end
if string_find(statusBuf, "[^ \t\r\n]", statusPos) then
decode_error "trailing garbage"
end
return res
end
-- Generate a lightuserdata
json.null = debug.upvalueid(decode, 1)
return json