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-- Copyright (c) 2009 Aleksey Cheusov <vle@gmx.net>
--
-- 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 type, pairs, ipairs, io, os = type, pairs, ipairs, io, os
module ("alt_getopt")
local function convert_short2long (opts)
local i = 1
local len = #opts
local ret = {}
for short_opt, accept_arg in opts:gmatch("(%w)(:?)") do
ret[short_opt]=#accept_arg
end
return ret
end
local function exit_with_error (msg, exit_status)
io.stderr:write (msg)
os.exit (exit_status)
end
local function err_unknown_opt (opt)
exit_with_error ("Unknown option `-" ..
(#opt > 1 and "-" or "") .. opt .. "'\n", 1)
end
local function canonize (options, opt)
if not options [opt] then
err_unknown_opt (opt)
end
while type (options [opt]) == "string" do
opt = options [opt]
if not options [opt] then
err_unknown_opt (opt)
end
end
return opt
end
function get_ordered_opts (arg, sh_opts, long_opts)
local i = 1
local count = 1
local opts = {}
local optarg = {}
local options = convert_short2long (sh_opts)
for k,v in pairs (long_opts) do
options [k] = v
end
while i <= #arg do
local a = arg [i]
if a == "--" then
i = i + 1
break
elseif a == "-" then
break
elseif a:sub (1, 2) == "--" then
local pos = a:find ("=", 1, true)
if pos then
local opt = a:sub (3, pos-1)
opt = canonize (options, opt)
if options [opt] == 0 then
exit_with_error ("Bad usage of option `" .. a .. "'\n", 1)
end
optarg [count] = a:sub (pos+1)
opts [count] = opt
else
local opt = a:sub (3)
opt = canonize (options, opt)
if options [opt] == 0 then
opts [count] = opt
else
if i == #arg then
exit_with_error ("Missed value for option `" .. a .. "'\n", 1)
end
optarg [count] = arg [i+1]
opts [count] = opt
i = i + 1
end
end
count = count + 1
elseif a:sub (1, 1) == "-" then
local j
for j=2,a:len () do
local opt = canonize (options, a:sub (j, j))
if options [opt] == 0 then
opts [count] = opt
count = count + 1
elseif a:len () == j then
if i == #arg then
exit_with_error ("Missed value for option `-" .. opt .. "'\n", 1)
end
optarg [count] = arg [i+1]
opts [count] = opt
i = i + 1
count = count + 1
break
else
optarg [count] = a:sub (j+1)
opts [count] = opt
count = count + 1
break
end
end
else
break
end
i = i + 1
end
return opts,i,optarg
end
function get_opts (arg, sh_opts, long_opts)
local ret = {}
local opts,optind,optarg = get_ordered_opts (arg, sh_opts, long_opts)
for i,v in ipairs (opts) do
if optarg [i] then
ret [v] = optarg [i]
else
ret [v] = 1
end
end
return ret,optind
end
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