.dotfiles/nvim/mason/packages/lua-language-server/libexec/script/jsonc.lua

375 lines
11 KiB
Lua

local type = type
local next = next
local error = error
local tonumber = tonumber
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 utf8_char
if _VERSION == "Lua 5.1" or _VERSION == "Lua 5.2" then
local math_floor = math.floor
function utf8_char(c)
if c <= 0x7f then
return string_char(c)
elseif c <= 0x7ff then
return string_char(math_floor(c / 64) + 192, c % 64 + 128)
elseif c <= 0xffff then
return string_char(
math_floor(c / 4096) + 224,
math_floor(c % 4096 / 64) + 128,
c % 64 + 128
)
elseif c <= 0x10ffff then
return string_char(
math_floor(c / 262144) + 240,
math_floor(c % 262144 / 4096) + 128,
math_floor(c % 4096 / 64) + 128,
c % 64 + 128
)
end
error(string_format("invalid UTF-8 code '%x'", c))
end
else
utf8_char = utf8.char
end
local json = require "json"
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
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()), 2)
end
local function get_word()
return string_match(statusBuf, "^[^ \t\r\n%]},]*", statusPos)
end
local function skip_comment(b)
if b ~= 47 --[[ '/' ]] then
return
end
local c = string_byte(statusBuf, statusPos+1)
if c == 42 --[[ '*' ]] then
-- block comment
local pos = string_find(statusBuf, "*/", statusPos)
if pos then
statusPos = pos + 2
else
statusPos = #statusBuf + 1
end
return true
elseif c == 47 --[[ '/' ]] then
-- line comment
local pos = string_find(statusBuf, "[\r\n]", statusPos)
if pos then
statusPos = pos
else
statusPos = #statusBuf + 1
end
return true
end
end
local function next_byte()
local pos = string_find(statusBuf, "[^ \t\r\n]", statusPos)
if pos then
statusPos = pos
local b = string_byte(statusBuf, pos)
if not skip_comment(b) then
return b
end
return next_byte()
end
return -1
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, '[%z\1-\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 = {}
local chr = next_byte()
if chr == 93 --[[ ']' ]] then
statusPos = statusPos + 1
return res
end
statusTop = statusTop + 1
statusAry[statusTop] = true
statusRef[statusTop] = res
return res
end
local function decode_object()
statusPos = statusPos + 1
local res = {}
local chr = next_byte()
if chr == 125 --[[ ']' ]] then
statusPos = statusPos + 1
return json.createEmptyObject()
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
local key = decode_string()
if next_byte() ~= 58 --[[ ':' ]] then
decode_error "expected ':'"
end
statusPos = statusPos + 1
ref[key] = decode()
end
if top == statusTop then
repeat
local chr = next_byte(); statusPos = statusPos + 1
if chr == 44 --[[ "," ]] then
local c = next_byte()
if statusAry[statusTop] then
if c ~= 93 --[[ "]" ]] then return end
else
if c ~= 125 --[[ "}" ]] then return end
end
statusPos = statusPos + 1
else
if statusAry[statusTop] then
if chr ~= 93 --[[ "]" ]] then decode_error "expected ']' or ','" end
else
if chr ~= 125 --[[ "}" ]] then decode_error "expected '}' or ','" end
end
end
statusTop = statusTop - 1
until statusTop == 0
end
end
function json.decode_jsonc(str)
if type(str) ~= "string" then
error("expected argument of type string, got " .. type(str))
end
statusBuf = str
statusPos = 1
statusTop = 0
if next_byte() == -1 then
return json.null
end
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
return json