ascii的编码和解码

README.md

ascii的编码和解码

测试代码

local ascii = require "ascii"
print(ascii.encode('我123321sdacsdavsd'))
print(ascii.decode('我123321sdacsdavsd'))

测试结果

我123321sdacsdavsd
我123321sdacsdavsd

ascii.lua

local toint = math.tointeger

local gsub = string.gsub
local fmt = string.format

local u8_char = utf8.char
local u8_codepoint = utf8.codepoint
local u8_charpattern = utf8.charpattern

local function enc_cb(s)
  return fmt('&#%d;', u8_codepoint(s))
end

local function dec_cb(s)
  local n = toint(s)
  return n and u8_char(n) or ('&#' .. s .. ';')
end

local ascii = { }

---comment 将文本转换为`ascii`编码
---@param text string  @编码文本
function ascii.encode(text)
  local v = gsub(text, u8_charpattern, enc_cb)
  return v
end

---comment 将文本内的`ascii`解码
---@param text string  @解码文本
function ascii.decode(text)
  local v = gsub(text, "&#([%d]+);", dec_cb)
  return v
end

return ascii