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--
-- gcsd
--
-- gcsd the generic command sequencer daemon can be used to serialize
-- commands sent over various paralell communication channels to a
-- single command output. It can be seen as a multiplexer for any
-- kind of communication between a single resource and various clients
-- which want to submit commands to it or query information from it.
-- gcsd is written in C and Lua. The goal is to provide an easy to
-- understand high level API based on Lua which can be used to
-- implement the business logic of the so formed multiplexer daemon.
--
--
-- Copyright (C) 2009-2010 Markus Grueneis <gimpf@spreadspace.org>
-- Christian Pointner <equinox@spreadspace.org>
--
-- This file is part of gcsd.
--
-- gcsd is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- any later version.
--
-- gcsd is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with gcsd. If not, see <http://www.gnu.org/licenses/>.
--
dispatch_table = {}
dispatch_table.regex_to_handler = {
-- TODO basic mode
}
function dispatch_table:load_handler_table_file(filename)
local defines = require('defines')
if (type(filename) ~= "nil") then
if (type(filename) ~= "string") then
log.printf(log.ERROR, "filename must be of type 'string' and denote a valid path")
return defines.KILL_DAEMON
end
local chunk = loadfile(filename)
if (not chunk) then
log.printf(log.ERROR, "failed to load lua-file '%s'", filename)
return defines.KILL_DAEMON
end
self:register_handler_table(chunk())
log.printf(log.NOTICE, "loaded dispatch table from file %s", filename)
end
return defines.OK
end
function dispatch_table:register_handler_table(handler_table)
if (type(handler_table) ~= "table") then
error("handler_table must be of type 'table'")
end
self.regex_to_handler = handler_table
end
function dispatch_table:dispatch(command_buffer)
local init = 1
repeat
local had_match = false
for regex, handler in pairs(self.regex_to_handler) do
local match = string.match(command_buffer, "^" .. regex, init)
if match then
handler(match)
had_match = true
init = init + string.len(match)
break
end
end
until (not had_match)
return string.sub(command_buffer, init + 1)
end
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