mirror of https://github.com/koreader/koreader
better argument parsing and option for gamma correction
included MIT-licensed alt_getopt implementation: http://files.luaforge.net/releases/alt-getopt/alt-getopt/alt-getopt-0.7.0 created example use of gamma correction. reader.lua now has usage notes for its invocation syntax.pull/2/merge
HW
13 years ago
parent
c1476e94c9
commit
ade5c4892d
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-- Copyright (c) 2009 Aleksey Cheusov <vle@gmx.net>
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--
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-- Permission is hereby granted, free of charge, to any person obtaining
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-- a copy of this software and associated documentation files (the
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-- "Software"), to deal in the Software without restriction, including
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-- without limitation the rights to use, copy, modify, merge, publish,
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-- distribute, sublicense, and/or sell copies of the Software, and to
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-- permit persons to whom the Software is furnished to do so, subject to
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-- the following conditions:
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--
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-- The above copyright notice and this permission notice shall be
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-- included in all copies or substantial portions of the Software.
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--
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-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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-- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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-- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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-- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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-- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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local type, pairs, ipairs, io, os = type, pairs, ipairs, io, os
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module ("alt_getopt")
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local function convert_short2long (opts)
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local i = 1
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local len = #opts
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local ret = {}
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for short_opt, accept_arg in opts:gmatch("(%w)(:?)") do
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ret[short_opt]=#accept_arg
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end
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return ret
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end
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local function exit_with_error (msg, exit_status)
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io.stderr:write (msg)
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os.exit (exit_status)
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end
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local function err_unknown_opt (opt)
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exit_with_error ("Unknown option `-" ..
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(#opt > 1 and "-" or "") .. opt .. "'\n", 1)
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end
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local function canonize (options, opt)
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if not options [opt] then
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err_unknown_opt (opt)
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end
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while type (options [opt]) == "string" do
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opt = options [opt]
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if not options [opt] then
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err_unknown_opt (opt)
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end
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end
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return opt
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end
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function get_ordered_opts (arg, sh_opts, long_opts)
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local i = 1
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local count = 1
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local opts = {}
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local optarg = {}
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local options = convert_short2long (sh_opts)
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for k,v in pairs (long_opts) do
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options [k] = v
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end
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while i <= #arg do
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local a = arg [i]
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if a == "--" then
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i = i + 1
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break
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elseif a == "-" then
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break
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elseif a:sub (1, 2) == "--" then
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local pos = a:find ("=", 1, true)
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if pos then
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local opt = a:sub (3, pos-1)
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opt = canonize (options, opt)
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if options [opt] == 0 then
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exit_with_error ("Bad usage of option `" .. a .. "'\n", 1)
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end
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optarg [count] = a:sub (pos+1)
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opts [count] = opt
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else
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local opt = a:sub (3)
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opt = canonize (options, opt)
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if options [opt] == 0 then
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opts [count] = opt
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else
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if i == #arg then
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exit_with_error ("Missed value for option `" .. a .. "'\n", 1)
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end
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optarg [count] = arg [i+1]
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opts [count] = opt
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i = i + 1
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end
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end
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count = count + 1
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elseif a:sub (1, 1) == "-" then
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local j
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for j=2,a:len () do
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local opt = canonize (options, a:sub (j, j))
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if options [opt] == 0 then
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opts [count] = opt
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count = count + 1
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elseif a:len () == j then
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if i == #arg then
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exit_with_error ("Missed value for option `-" .. opt .. "'\n", 1)
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end
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optarg [count] = arg [i+1]
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opts [count] = opt
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i = i + 1
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count = count + 1
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break
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else
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optarg [count] = a:sub (j+1)
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opts [count] = opt
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count = count + 1
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break
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end
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end
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else
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break
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end
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i = i + 1
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end
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return opts,i,optarg
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end
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function get_opts (arg, sh_opts, long_opts)
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local ret = {}
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local opts,optind,optarg = get_ordered_opts (arg, sh_opts, long_opts)
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for i,v in ipairs (opts) do
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if optarg [i] then
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ret [v] = optarg [i]
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else
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ret [v] = 1
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end
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end
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return ret,optind
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end
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