utf8_validator.lua

This Lua function can be used to validate UTF-8 strings.

Usage:

local utf8_validator = require 'utf8_validator'

local is_valid  = utf_validator.validate('This is valid')

-- you can also use the shortcut syntax:
local is_valid2 = utf_validator('This is also valid')

If a string is not valid utf8, then validate will also return the position of the first byte that makes it non-valid:

local is_valid, error_position = utf_validator(a_binary_blob)
if not is_valid then print('non-utf8 sequence detected at position ' .. tostring(error_position))

For valid utf8 strings, error_position is always nil.

Installation

Just copy the utf8_validator.lua file wherever you need it and require it.

License

This library is MIT-licensed.

Specs

This library uses busted for its specs. In order to run them, install busted and then:

cd path/where/the/spec/folder/is
busted