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0.1.4

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DarhangeR 2023-04-29 16:40:53 +03:00
parent 7eaffd1234
commit 62e3d71808
3 changed files with 306 additions and 297 deletions
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1
.github/FUNDING.yml vendored
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@ -1 +0,0 @@
github: rxi

3
LICENSE
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@ -1,5 +1,4 @@
Copyright (c) 2020 rxi Copyright (c) 2020 rxi (v0.1.2) edit by DarhangeR (v0.1.4)
Permission is hereby granted, free of charge, to any person obtaining a copy of Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in this software and associated documentation files (the "Software"), to deal in

599
json.lua
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@ -1,4 +1,29 @@
local json = { _version = "0.1.3" } --
-- json.lua
--
-- Copyright (c) 2020 rxi (v0.1.2) edit by DarhangeR (v0.1.4)
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy of
-- this software and associated documentation files (the "Software"), to deal in
-- the Software without restriction, including without limitation the rights to
-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-- of the Software, and to permit persons to whom the Software is furnished to do
-- so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in all
-- copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-- SOFTWARE.
--
local pairs, string_format, error, rawget, next, string_char, type, ipairs, table_concat, tostring, select, tonumber = pairs, string.format, error, rawget, next, string.char, type, ipairs, table.concat, tostring, select, tonumber
local json = { _version = "0.1.4" };
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
-- Encode -- Encode
@ -14,114 +39,109 @@ local escape_char_map = {
[ "\n" ] = "n", [ "\n" ] = "n",
[ "\r" ] = "r", [ "\r" ] = "r",
[ "\t" ] = "t", [ "\t" ] = "t",
} };
local escape_char_map_inv = { [ "/" ] = "/" } local escape_char_map_inv = { [ "/" ] = "/" }
for k, v in pairs(escape_char_map) do for k, v in pairs(escape_char_map) do
escape_char_map_inv[v] = k escape_char_map_inv[v] = k;
end end;
local function escape_char(c) local function escape_char(c)
return "\\" .. (escape_char_map[c] or string.format("u%04x", c:byte())) return "\\" .. (escape_char_map[c] or string_format("u%04x", c:byte()));
end end;
local function encode_nil(rope)
rope[#rope + 1] = "null"
end;
local function encode_nil(val) local function encode_table(rope, val, stack)
return "null" -- Circular reference?
end if stack[val] then error("circular reference") end
stack[val] = true
if rawget(val, 1) ~= nil or next(val) == nil then
local function encode_table(val, stack) -- Treat as array -- check keys are valid and it is not sparse
local res = {} local n = 0;
stack = stack or {} for k in pairs(val) do
if type(k) ~= "number" then
-- Circular reference? error("invalid table: mixed or invalid key types")
if stack[val] then error("circular reference") end
stack[val] = true
-- Check whether to treat as a array or object
local array = true
local length = 0
local nLen = 0
for k,v in pairs(val) do
if (type(k) ~= "number" or k<=0) and not (k == "n" and type(v) == "number") then
array = nil
break -- Treat as object
else
if k > length then
length = k
end end
if k == "n" and type(v) == "number" then n = n + 1
nLen = v end
if n ~= #val then
error("invalid table: sparse array")
end
-- Encode
rope[#rope + 1] = "["
for i, v in ipairs(val) do
if i > 1 then
rope[#rope + 1] = ","
end
encode(rope, v, stack)
end
rope[#rope + 1] = "]"
else
-- Treat as an object
rope[#rope + 1] = "{"
local first = true;
for k, v in pairs(val) do
if type(k) ~= "string" then
error("invalid table: mixed or invalid key types")
end end
if not first then
rope[#rope + 1] = ","
end
encode(rope, k, stack)
rope[#rope + 1] = ":"
encode(rope, v, stack)
first = false
end end
end rope[#rope + 1] = "}"
end
stack[val] = nil
end;
if array then local function encode_string(rope, val)
if nLen > length then rope[#rope + 1] = '"'
length = nLen rope[#rope + 1] = val:gsub('[%z\1-\31\\"]', escape_char)
end rope[#rope + 1] = '"'
-- Encode end;
for i = 1, length do
table.insert(res, encode(val[i], stack))
end
stack[val] = nil
return "[" .. table.concat(res, ",") .. "]"
else local function encode_number(rope, val)
-- Treat as an object -- Check for NaN, -inf and inf
for k, v in pairs(val) do if val ~= val or val <= -math.huge or val >= math.huge then
--[[ error("unexpected number value '" .. tostring(val) .. "'")
if type(k) ~= "string" then end
error("invalid table: mixed or invalid key types") -- See www.cs.berkeley.edu/~wkahan/ieee754status/IEEE754.PDF
end -- 17 digits suffice to losslessly represent 64-bit IEEE754 floats
]] rope[#rope + 1] = ("%.17g"):format(val)
table.insert(res, encode(k, stack) .. ":" .. encode(v, stack)) end;
end
stack[val] = nil
return "{" .. table.concat(res, ",") .. "}"
end
end
local function encode_string(val)
return '"' .. val:gsub('[%z\1-\31\\"]', escape_char) .. '"'
end
local function encode_number(val)
-- Check for NaN, -inf and inf
if val ~= val or val <= -math.huge or val >= math.huge then
error("unexpected number value '" .. tostring(val) .. "'")
end
return tostring(val)
end
local function encode_boolean(rope, val)
rope[#rope + 1] = val and "true" or "false"
end;
local type_func_map = { local type_func_map = {
[ "nil" ] = encode_nil, [ "nil" ] = encode_nil,
[ "table" ] = encode_table, [ "table" ] = encode_table,
[ "string" ] = encode_string, [ "string" ] = encode_string,
[ "number" ] = encode_number, [ "number" ] = encode_number,
[ "boolean" ] = tostring, [ "boolean" ] = encode_boolean,
} };
encode = function(val, stack)
local t = type(val)
local f = type_func_map[t]
if f then
return f(val, stack)
end
error("unexpected type '" .. t .. "'")
end
function encode(rope, val, stack)
local t = type(val)
local encoder = type_func_map[t]
if encoder then
return encoder(rope, val, stack)
end
error("unexpected type '" .. t .. "'")
end;
function json.encode(val) function json.encode(val)
return ( encode(val) ) local rope = {}
end encode(rope, val, {})
return table_concat(rope);
end;
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
-- Decode -- Decode
@ -130,245 +150,236 @@ end
local parse local parse
local function create_set(...) local function create_set(...)
local res = {} local res = {};
for i = 1, select("#", ...) do for i = 1, select("#", ...) do
res[ select(i, ...) ] = true res[ select(i, ...) ] = true
end end
return res return res;
end end
local space_chars = create_set(" ", "\t", "\r", "\n") local space_chars = create_set(" ", "\t", "\r", "\n");
local delim_chars = create_set(" ", "\t", "\r", "\n", "]", "}", ",") local delim_chars = create_set(" ", "\t", "\r", "\n", "]", "}", ",");
local escape_chars = create_set("\\", "/", '"', "b", "f", "n", "r", "t", "u") local escape_chars = create_set("\\", "/", '"', "b", "f", "n", "r", "t", "u");
local literals = create_set("true", "false", "null") local literals = create_set("true", "false", "null");
local literal_map = { local literal_map = {
[ "true" ] = true, [ "true" ] = true,
[ "false" ] = false, [ "false" ] = false,
[ "null" ] = nil, [ "null" ] = nil,
} };
local function next_char(str, idx, set, negate) local function next_char(str, idx, set, negate)
for i = idx, #str do for i = idx, #str do
if set[str:sub(i, i)] ~= negate then if set[str:sub(i, i)] ~= negate then
return i return i
end end
end end
return #str + 1 return #str + 1;
end end;
local function decode_error(str, idx, msg) local function decode_error(str, idx, msg)
local line_count = 1 local line_count = 1
local col_count = 1 local col_count = 1
for i = 1, idx - 1 do for i = 1, idx - 1 do
col_count = col_count + 1 col_count = col_count + 1
if str:sub(i, i) == "\n" then if str:sub(i, i) == "\n" then
line_count = line_count + 1 line_count = line_count + 1
col_count = 1 col_count = 1
end end
end end
error( string.format("%s at line %d col %d", msg, line_count, col_count) ) error(string_format("%s at line %d col %d", msg, line_count, col_count))
end end;
local function codepoint_to_utf8(n) local function codepoint_to_utf8(n)
-- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa -- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa
local f = math.floor local f = math.floor;
if n <= 0x7f then if n <= 0x7f then
return string.char(n) return string_char(n)
elseif n <= 0x7ff then elseif n <= 0x7ff then
return string.char(f(n / 64) + 192, n % 64 + 128) return string_char(f(n / 64) + 192, n % 64 + 128)
elseif n <= 0xffff then elseif n <= 0xffff then
return string.char(f(n / 4096) + 224, f(n % 4096 / 64) + 128, n % 64 + 128) return string_char(f(n / 4096) + 224, f(n % 4096 / 64) + 128, n % 64 + 128)
elseif n <= 0x10ffff then elseif n <= 0x10ffff then
return string.char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128, return string_char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128,
f(n % 4096 / 64) + 128, n % 64 + 128) f(n % 4096 / 64) + 128, n % 64 + 128)
end end
error( string.format("invalid unicode codepoint '%x'", n) ) error( string_format("invalid unicode codepoint '%x'", n) )
end end;
local function parse_unicode_escape(s) local function parse_unicode_escape(s)
local n1 = tonumber( s:sub(1, 4), 16 ) local n1 = tonumber(s:sub(1, 4), 16);
local n2 = tonumber( s:sub(7, 10), 16 ) local n2 = tonumber(s:sub(7, 10), 16);
-- Surrogate pair? -- Surrogate pair?
if n2 then if n2 then
return codepoint_to_utf8((n1 - 0xd800) * 0x400 + (n2 - 0xdc00) + 0x10000) return codepoint_to_utf8((n1 - 0xd800) * 0x400 + (n2 - 0xdc00) + 0x10000);
else else
return codepoint_to_utf8(n1) return codepoint_to_utf8(n1);
end end
end end;
local function parse_string(str, i) local function parse_string(str, i)
local res = {} local res = {};
local j = i + 1 local j = i + 1;
local k = j local k = j;
while j <= #str do
local x = str:byte(j)
if x < 32 then
decode_error(str, j, "control character in string")
while j <= #str do
local x = str:byte(j);
if x < 32 then
decode_error(str, j, "control character in string")
elseif x == 92 then -- `\`: Escape elseif x == 92 then -- `\`: Escape
table.insert(res, str:sub(k, j - 1)) res[#res + 1] = str:sub(k, j - 1)
j = j + 1 j = j + 1
local c = str:sub(j, j) local c = str:sub(j, j)
if c == "u" then if c == "u" then
local hex = str:match("^[dD][89aAbB]%x%x\\u%x%x%x%x", j + 1) local hex = str:match("^[dD][89aAbB]%x%x\\u%x%x%x%x", j + 1)
or str:match("^%x%x%x%x", j + 1) or str:match("^%x%x%x%x", j + 1)
or decode_error(str, j - 1, "invalid unicode escape in string") or decode_error(str, j - 1, "invalid unicode escape in string")
table.insert(res, parse_unicode_escape(hex)) res[#res + 1] = parse_unicode_escape(hex)
j = j + #hex j = j + #hex
else else
if not escape_chars[c] then if not escape_chars[c] then
decode_error(str, j - 1, "invalid escape char '" .. c .. "' in string") decode_error(str, j - 1, "invalid escape char '" .. c .. "' in string")
end end
table.insert(res, escape_char_map_inv[c]) res[#res + 1] = escape_char_map_inv[c]
end end
k = j + 1 k = j + 1
elseif x == 34 then -- `"`: End of string
elseif x == 34 then -- `"`: End of string res[#res + 1] = str:sub(k, j - 1)
table.insert(res, str:sub(k, j - 1)) return table_concat(res), j + 1
return table.concat(res), j + 1 end
end j = j + 1
end
j = j + 1 decode_error(str, i, "expected closing quote for string")
end return table_concat(res);
end;
decode_error(str, i, "expected closing quote for string")
end
local function parse_number(str, i) local function parse_number(str, i)
local x = next_char(str, i, delim_chars) local x = next_char(str, i, delim_chars);
local s = str:sub(i, x - 1) local s = str:sub(i, x - 1);
local n = tonumber(s) local n = tonumber(s);
if not n then if not n then
decode_error(str, i, "invalid number '" .. s .. "'") decode_error(str, i, "invalid number '" .. s .. "'")
end end
return n, x return n, x;
end end;
local function parse_literal(str, i) local function parse_literal(str, i)
local x = next_char(str, i, delim_chars) local x = next_char(str, i, delim_chars)
local word = str:sub(i, x - 1) local word = str:sub(i, x - 1)
if not literals[word] then if not literals[word] then
decode_error(str, i, "invalid literal '" .. word .. "'") decode_error(str, i, "invalid literal '" .. word .. "'")
end end
return literal_map[word], x return literal_map[word], x;
end end;
local function parse_array(str, i) local function parse_array(str, i)
local res = {} local res = {};
local n = 1 local n = 1;
i = i + 1 i = i + 1
while 1 do while 1 do
local x local x;
i = next_char(str, i, space_chars, true) i = next_char(str, i, space_chars, true)
-- Empty / end of array? -- Empty / end of array?
if str:sub(i, i) == "]" then if str:sub(i, i) == "]" then
i = i + 1 i = i + 1
break break;
end end
-- Read token -- Read token
x, i = parse(str, i) x, i = parse(str, i)
res[n] = x res[n] = x
n = n + 1 n = n + 1
-- Next token -- Next token
i = next_char(str, i, space_chars, true) i = next_char(str, i, space_chars, true)
local chr = str:sub(i, i) local chr = str:sub(i, i);
i = i + 1 i = i + 1
if chr == "]" then break end if chr == "]" then
if chr ~= "," then decode_error(str, i, "expected ']' or ','") end break;
end end
return res, i if chr ~= "," then
end decode_error(str, i, "expected ']' or ','")
end
end
return res, i;
end;
local function parse_object(str, i) local function parse_object(str, i)
local res = {} local res = {};
i = i + 1 i = i + 1
while 1 do while 1 do
local key, val local key, val;
i = next_char(str, i, space_chars, true) i = next_char(str, i, space_chars, true)
-- Empty / end of object? -- Empty / end of object?
if str:sub(i, i) == "}" then if str:sub(i, i) == "}" then
i = i + 1 i = i + 1
break break;
end end
-- Read key -- Read key
if str:sub(i, i) ~= '"' then if str:sub(i, i) ~= '"' then
decode_error(str, i, "expected string for key") decode_error(str, i, "expected string for key")
end end
key, i = parse(str, i) key, i = parse(str, i)
-- Read ':' delimiter -- Read ':' delimiter
i = next_char(str, i, space_chars, true) i = next_char(str, i, space_chars, true)
if str:sub(i, i) ~= ":" then if str:sub(i, i) ~= ":" then
decode_error(str, i, "expected ':' after key") decode_error(str, i, "expected ':' after key")
end end
i = next_char(str, i + 1, space_chars, true) i = next_char(str, i + 1, space_chars, true)
-- Read value -- Read value
val, i = parse(str, i) val, i = parse(str, i)
-- Set -- Set
res[key] = val res[key] = val
-- Next token -- Next token
i = next_char(str, i, space_chars, true) i = next_char(str, i, space_chars, true)
local chr = str:sub(i, i) local chr = str:sub(i, i)
i = i + 1 i = i + 1
if chr == "}" then break end if chr == "}" then
if chr ~= "," then decode_error(str, i, "expected '}' or ','") end break;
end end
return res, i if chr ~= "," then
end decode_error(str, i, "expected '}' or ','") end
end
return res, i;
end;
local char_func_map = { local char_func_map = {
[ '"' ] = parse_string, [ '"' ] = parse_string,
[ "0" ] = parse_number, [ "0" ] = parse_number,
[ "1" ] = parse_number, [ "1" ] = parse_number,
[ "2" ] = parse_number, [ "2" ] = parse_number,
[ "3" ] = parse_number, [ "3" ] = parse_number,
[ "4" ] = parse_number, [ "4" ] = parse_number,
[ "5" ] = parse_number, [ "5" ] = parse_number,
[ "6" ] = parse_number, [ "6" ] = parse_number,
[ "7" ] = parse_number, [ "7" ] = parse_number,
[ "8" ] = parse_number, [ "8" ] = parse_number,
[ "9" ] = parse_number, [ "9" ] = parse_number,
[ "-" ] = parse_number, [ "-" ] = parse_number,
[ "t" ] = parse_literal, [ "t" ] = parse_literal,
[ "f" ] = parse_literal, [ "f" ] = parse_literal,
[ "n" ] = parse_literal, [ "n" ] = parse_literal,
[ "[" ] = parse_array, [ "[" ] = parse_array,
[ "{" ] = parse_object, [ "{" ] = parse_object,
} };
parse = function(str, idx) parse = function(str, idx)
local chr = str:sub(idx, idx) local chr = str:sub(idx, idx);
local f = char_func_map[chr] local f = char_func_map[chr];
if f then if f then
return f(str, idx) return f(str, idx);
end end
decode_error(str, idx, "unexpected character '" .. chr .. "'") decode_error(str, idx, "unexpected character '" .. chr .. "'");
end end;
function json.decode(str) function json.decode(str)
if type(str) ~= "string" then if type(str) ~= "string" then
error("expected argument of type string, got " .. type(str)) error("expected argument of type string, got " .. type(str));
end end
local res, idx = parse(str, next_char(str, 1, space_chars, true)) local res, idx = parse(str, next_char(str, 1, space_chars, true))
idx = next_char(str, idx, space_chars, true) idx = next_char(str, idx, space_chars, true)
if idx <= #str then if idx <= #str then
decode_error(str, idx, "trailing garbage") decode_error(str, idx, "trailing garbage")
end end
return res return res;
end end;
return json; return json;