File size: 1,481 Bytes
7e9dc27 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 |
-- This file is part of broadcaster library
-- Licensed under MIT License
-- Copyright (c) 2019 Ranx
-- https://github.com/r4nx/broadcaster
-- Version 0.2.0
local utf8 = require 'lua-utf8'
local encoder = {}
-- Encodes message according to specified charset
-- Args:
-- message <string> - message to encode
-- charset <table> - charset to use for encoding (use charset.lua)
-- Returns:
-- Table of integers
function encoder.encode(message, charset)
local encoded = {}
utf8.gsub(message, '.', function(c)
encoded[#encoded + 1] = charset[c]
end)
return encoded
end
-- Decodes table of integers back to message
-- Args:
-- data <table> - data to decode
-- charset <table> - charset to use for decoding (use charset.lua)
-- Returns:
-- string
function encoder.decode(data, charset)
local decoded = {}
for _, c in ipairs(data) do
decoded[#decoded + 1] = charset[c]
end
return table.concat(decoded, '')
end
-- Check if all message characters are in charset
-- Args:
-- message <string> - message to encode
-- charset <table> - charset to use for encoding (use charset.lua)
-- Returns:
-- bool
function encoder.check(message, charset)
local unknownCharacter = false
utf8.gsub(message, '.', function(c)
if charset[c] == nil then
unknownCharacter = true
end
end)
return not unknownCharacter
end
return encoder
|