local getmetatable, setmetatable = getmetatable, setmetatable
local rawget, rawset, unpack = rawget, rawset, unpack
-local tostring, type, assert = tostring, type, assert
+local tostring, type, assert = tostring, type, assert
local ipairs, pairs, loadstring = ipairs, pairs, loadstring
local require, pcall, xpcall = require, pcall, xpcall
+local collectgarbage, get_memory_limit = collectgarbage, get_memory_limit
--- LuCI utility functions.
module "luci.util"
if not b then
return a
elseif type(b) == "table" then
+ for k, _ in pairs(b) do if type(b[k]) == "userdata" then b[k] = tostring(b[k]) end end
return a:format(unpack(b))
else
+ if type(b) == "userdata" then b = tostring(b) end
return a:format(b)
end
end
-- Class helper routines
--
+-- Instantiates a class
+local function _instantiate(class, ...)
+ local inst = setmetatable({}, {__index = class})
+
+ if inst.__init__ then
+ inst:__init__(...)
+ end
+
+ return inst
+end
+
--- Create a Class object (Python-style object model).
-- The class object can be instantiated by calling itself.
-- Any class functions or shared parameters can be attached to this object.
-- @see instanceof
-- @see clone
function class(base)
- local class = {}
-
- local create = function(class, ...)
- local inst = setmetatable({}, {__index = class})
-
- if inst.__init__ then
- inst:__init__(...)
- end
-
- return inst
- end
-
- local classmeta = {__call = create}
-
- if base then
- classmeta.__index = base
- end
-
- setmetatable(class, classmeta)
- return class
+ return setmetatable({}, {
+ __call = _instantiate,
+ __index = base
+ })
end
--- Test whether the given object is an instance of the given class.
-- Scope manipulation routines
--
---- Create a new or get an already existing thread local store associated with
--- the current active coroutine. A thread local store is private a table object
--- whose values can't be accessed from outside of the running coroutine.
--- @return Table value representing the corresponding thread local store
-function threadlocal()
- local tbl = {}
-
- local function get(self, key)
- local c = coroutine.running()
- local thread = coxpt[c] or c or 0
- if not rawget(self, thread) then
- return nil
- end
- return rawget(self, thread)[key]
- end
+local tl_meta = {
+ __mode = "k",
+
+ __index = function(self, key)
+ local t = rawget(self, coxpt[coroutine.running()]
+ or coroutine.running() or 0)
+ return t and t[key]
+ end,
- local function set(self, key, value)
- local c = coroutine.running()
- local thread = coxpt[c] or c or 0
- if not rawget(self, thread) then
- rawset(self, thread, {})
+ __newindex = function(self, key, value)
+ local c = coxpt[coroutine.running()] or coroutine.running() or 0
+ if not rawget(self, c) then
+ rawset(self, c, { [key] = value })
+ else
+ rawget(self, c)[key] = value
end
- rawget(self, thread)[key] = value
end
+}
- setmetatable(tbl, {__index = get, __newindex = set, __mode = "k"})
-
- return tbl
+--- Create a new or get an already existing thread local store associated with
+-- the current active coroutine. A thread local store is private a table object
+-- whose values can't be accessed from outside of the running coroutine.
+-- @return Table value representing the corresponding thread local store
+function threadlocal(tbl)
+ return setmetatable(tbl or {}, tl_meta)
end
function dumptable(t, maxdepth, i, seen)
i = i or 0
seen = seen or setmetatable({}, {__mode="k"})
-
+
for k,v in pairs(t) do
perror(string.rep("\t", i) .. tostring(k) .. "\t" .. tostring(v))
if type(v) == "table" and (not maxdepth or i < maxdepth) then
--- Create valid XML PCDATA from given string.
-- @param value String value containing the data to escape
-- @return String value containing the escaped data
+local function _pcdata_repl(c)
+ local i = string.byte(c)
+
+ if ( i >= 0x00 and i <= 0x08 ) or ( i >= 0x0B and i <= 0x0C ) or
+ ( i >= 0x0E and i <= 0x1F ) or ( i == 0x7F )
+ then
+ return ""
+
+ elseif ( i == 0x26 ) or ( i == 0x27 ) or ( i == 0x22 ) or
+ ( i == 0x3C ) or ( i == 0x3E )
+ then
+ return string.format("&#%i;", i)
+ end
+
+ return c
+end
+
function pcdata(value)
- if not value then return end
- value = tostring(value)
- value = value:gsub("&", "&")
- value = value:gsub('"', """)
- value = value:gsub("'", "'")
- value = value:gsub("<", "<")
- return value:gsub(">", ">")
+ return value and tostring(value):gsub("[&\"'<>%c]", _pcdata_repl)
end
--- Strip HTML tags from given string.
-- @param value String containing the HTML text
-- @return String with HTML tags stripped of
function striptags(s)
- return pcdata(s:gsub("</?[A-Za-z][A-Za-z0-9:_%-]*[^>]*>", " "):gsub("%s+", " "))
+ return pcdata(tostring(s):gsub("</?[A-Za-z][A-Za-z0-9:_%-]*[^>]*>", " "):gsub("%s+", " "))
end
--- Splits given string on a defined separator sequence and return a table
return (str:gsub("^%s*(.-)%s*$", "%1"))
end
+--- Count the occurences of given substring in given string.
+-- @param str String to search in
+-- @param pattern String containing pattern to find
+-- @return Number of found occurences
+function cmatch(str, pat)
+ local count = 0
+ for _ in str:gmatch(pat) do count = count + 1 end
+ return count
+end
+
--- Parse certain units from the given string and return the canonical integer
-- value or 0 if the unit is unknown. Upper- or lower case is irrelevant.
-- Recognized units are:
return val
end
---- Combines two or more numerically indexed tables into one.
+-- also register functions above in the central string class for convenience
+string.escape = escape
+string.pcdata = pcdata
+string.striptags = striptags
+string.split = split
+string.trim = trim
+string.cmatch = cmatch
+string.parse_units = parse_units
+
+
+--- Appends numerically indexed tables or single objects to a given table.
+-- @param src Target table
+-- @param ... Objects to insert
+-- @return Target table
+function append(src, ...)
+ for i, a in ipairs({...}) do
+ if type(a) == "table" then
+ for j, v in ipairs(a) do
+ src[#src+1] = v
+ end
+ else
+ src[#src+1] = a
+ end
+ end
+ return src
+end
+
+--- Combines two or more numerically indexed tables and single objects into one table.
-- @param tbl1 Table value to combine
-- @param tbl2 Table value to combine
-- @param ... More tables to combine
-- @return Table value containing all values of given tables
function combine(...)
- local result = {}
- for i, a in ipairs(arg) do
- for j, v in ipairs(a) do
- result[#result+1] = v
- end
- end
- return result
+ return append({}, ...)
end
--- Checks whether the given table contains the given value.
function _serialize_table(t, seen)
assert(not seen[t], "Recursion detected.")
seen[t] = true
-
+
local data = ""
local idata = ""
local ilen = 0
for i = 1, ilen do
local v = serialize_data(t[i], seen)
idata = idata .. ( #idata > 0 and ", " or "" ) .. v
- end
+ end
return idata .. ( #data > 0 and #idata > 0 and ", " or "" ) .. data
end
-- @see get_bytecode
function serialize_data(val, seen)
seen = seen or setmetatable({}, {__mode="k"})
-
+
if val == nil then
return "nil"
elseif type(val) == "number" then
end
end
- local strip_function
- strip_function = function(code)
+ local function strip_function(code)
local count, offset = subint(code, 1, size)
- local stripped, dirty = string.rep("\0", size), offset + count
+ local stripped = { string.rep("\0", size) }
+ local dirty = offset + count
offset = offset + count + int * 2 + 4
offset = offset + int + subint(code, offset, int) * ins
count, offset = subint(code, offset, int)
end
end
count, offset = subint(code, offset, int)
- stripped = stripped .. code:sub(dirty, offset - 1)
+ stripped[#stripped+1] = code:sub(dirty, offset - 1)
for n = 1, count do
local proto, off = strip_function(code:sub(offset, -1))
- stripped, offset = stripped .. proto, offset + off - 1
+ stripped[#stripped+1] = proto
+ offset = offset + off - 1
end
offset = offset + subint(code, offset, int) * int + int
count, offset = subint(code, offset, int)
for n = 1, count do
offset = offset + subint(code, offset, size) + size
end
- stripped = stripped .. string.rep("\0", int * 3)
- return stripped, offset
+ stripped[#stripped+1] = string.rep("\0", int * 3)
+ return table.concat(stripped), offset
end
return code:sub(1,12) .. strip_function(code:sub(13,-1))
end
local _pos = 0
- local _len = table.getn( keys )
table.sort( keys, f )
return function()
_pos = _pos + 1
- if _pos <= _len then
+ if _pos <= #keys then
return keys[_pos], t[keys[_pos]]
end
end
return pp and function()
local line = pp:read()
-
+
if not line then
pp:close()
end
-
+
return line
end
end
--- Returns the absolute path to LuCI base directory.
-- @return String containing the directory path
function libpath()
- return require "luci.fs".dirname(ldebug.__file__)
+ return require "nixio.fs".dirname(ldebug.__file__)
end
end
-- Handle return value of protected call
-function handleReturnValue(err, co, status, ...)
+function handleReturnValue(err, co, status, arg1, arg2, arg3, arg4, arg5)
if not status then
- return false, err(debug.traceback(co, (...)), ...)
+ return false, err(debug.traceback(co, arg1), arg1, arg2, arg3, arg4, arg5)
end
- if coroutine.status(co) == 'suspended' then
- return performResume(err, co, coroutine.yield(...))
- else
- return true, ...
+
+ if coroutine.status(co) ~= 'suspended' then
+ return true, arg1, arg2, arg3, arg4, arg5
end
+
+ return performResume(err, co, coroutine.yield(arg1, arg2, arg3, arg4, arg5))
end
-- Resume execution of protected function call
-function performResume(err, co, ...)
- return handleReturnValue(err, co, coroutine.resume(co, ...))
+function performResume(err, co, arg1, arg2, arg3, arg4, arg5)
+ return handleReturnValue(err, co, coroutine.resume(co, arg1, arg2, arg3, arg4, arg5))
end
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