--[[This file is an adaptation from the following source: https://github.com/attractivechaos/klib/blob/master/lua/klib.lua ]] --[[ The MIT License Copyright (c) 2011, Attractive Chaos <attractor@live.co.uk> 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 function split(txt) local retval = {}; for i in string.gmatch(txt, "%S+") do table.insert(retval,i) end return retval end -- Description: getopt() translated from the BSD getopt(); compatible with the default Unix getopt() --[[ Example: for o, a in os.getopt(arg, 'a:b') do print(o, a) end ]]-- local function getopt(args, ostr) -- Modification to handle strings instead of tables: if type(args) == 'string' then args = split(args) end local arg, place = nil, 0; return function () if place == 0 then -- update scanning pointer place = 1 if #args == 0 or args[1]:sub(1, 1) ~= '-' then place = 0; return nil end if #args[1] >= 2 then place = place + 1 if args[1]:sub(2, 2) == '-' then -- found "--" place = 0 table.remove(args, 1); return nil; end end end local optopt = args[1]:sub(place, place); place = place + 1; local oli = ostr:find(optopt); if optopt == ':' or oli == nil then -- unknown option if optopt == '-' then return nil end if place > #args[1] then table.remove(args, 1); place = 0; end return '?'; end oli = oli + 1; if ostr:sub(oli, oli) ~= ':' then -- do not need argument arg = nil; if place > #args[1] then table.remove(args, 1); place = 0; end else -- need an argument if place <= #args[1] then -- no white space arg = args[1]:sub(place); else table.remove(args, 1); if #args == 0 then -- an option requiring argument is the last one place = 0; if ostr:sub(1, 1) == ':' then return ':' end return '?'; else arg = args[1] end end table.remove(args, 1); place = 0; end return optopt, arg; end end return { getopt = getopt }