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--[[
FFLuCI - Utility library
Description:
Several common useful Lua functions
FileId:
$Id$
License:
Copyright 2008 Steven Barth <steven@midlink.org>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
module("ffluci.util", package.seeall)
-- Checks whether a table has an object "value" in it
function contains(table, value)
for k,v in pairs(table) do
if value == v then
return true
end
end
return false
end
-- Dumps a table to stdout (useful for testing and debugging)
function dumptable(t, i)
i = i or 0
for k,v in pairs(t) do
print(string.rep("\t", i) .. k, v)
if type(v) == "table" then
dumptable(v, i+1)
end
end
end
-- Escapes all occurences of c in s
function escape(s, c)
c = c or "\\"
return s:gsub(c, "\\" .. c)
end
-- Runs "command" and returns its output
function exec(command, return_array)
local pp = io.popen(command)
local data = nil
if return_array then
local line = ""
data = {}
while true do
line = pp:read()
if (line == nil) then break end
table.insert(data, line)
end
pp:close()
else
data = pp:read("*a")
pp:close()
end
return data
end
-- Populate obj in the scope of f as key
function extfenv(f, key, obj)
local scope = getfenv(f)
scope[key] = obj
setfenv(f, scope)
end
-- Updates the scope of f with "extscope"
function updfenv(f, extscope)
local scope = getfenv(f)
for k, v in pairs(extscope) do
scope[k] = v
end
setfenv(f, scope)
end
-- Returns the filename of the calling script
function __file__()
return debug.getinfo(2, 'S').source:sub(2)
end
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