2 LuCI utility functions.
8 Create a Class object (Python-style object model).
10 The class object can be instantiated by calling itself.
11 Any class functions or shared parameters can be attached to this object.
12 Attaching a table to the class object makes this table shared between
13 all instances of this class. For object parameters use the __init__ function.
14 Classes can inherit member functions and values from a base class.
15 Class can be instantiated by calling them. All parameters will be passed
16 to the __init__ function of this class - if such a function exists.
17 The __init__ function must be used to set any object parameters that are not shared
18 with other objects of this class. Any return values will be ignored.
21 @param base The base class to inherit from (optional)
22 @return A class object
28 Test whether the given object is an instance of the given class.
32 @param object Object instance
33 @param class Class object to test against
34 @return Boolean indicating whether the object is an instance
40 Create a new or get an already existing thread local store associated with
42 the current active coroutine. A thread local store is private a table object
43 whose values can't be accessed from outside of the running coroutine.
46 @return Table value representing the corresponding thread local store
50 Write given object to stderr.
54 @param obj Value to write to stderr
55 @return Boolean indicating whether the write operation was successful
59 Recursively dumps a table to stdout, useful for testing and debugging.
63 @param t Table value to dump
64 @param maxdepth Maximum depth
69 Create valid XML PCDATA from given string.
73 @param value String value containing the data to escape
74 @return String value containing the escaped data
78 Strip HTML tags from given string.
82 @param value String containing the HTML text
83 @return String with HTML tags stripped of
87 Splits given string on a defined separator sequence and return a table
89 containing the resulting substrings. The optional max parameter specifies
90 the number of bytes to process, regardless of the actual length of the given
91 string. The optional last parameter, regex, specifies whether the separator
92 sequence is interpreted as regular expression.
95 @param str String value containing the data to split up
96 @param pat String with separator pattern (optional, defaults to "\n")
97 @param max Maximum times to split (optional)
98 @param regex Boolean indicating whether to interpret the separator
99 -- pattern as regular expression (optional, default is false)
100 @return Table containing the resulting substrings
104 Remove leading and trailing whitespace from given string value.
108 @param str String value containing whitespace padded data
109 @return String value with leading and trailing space removed
113 Count the occurences of given substring in given string.
117 @param str String to search in
118 @param pattern String containing pattern to find
119 @return Number of found occurences
123 Return a matching iterator for the given value. The iterator will return
125 one token per invocation, the tokens are separated by whitespace. If the
126 input value is a table, it is transformed into a string first. A nil value
127 will result in a valid interator which aborts with the first invocation.
130 @param val The value to scan (table, string or nil)
131 @return Iterator which returns one token per call
135 Parse certain units from the given string and return the canonical integer
137 value or 0 if the unit is unknown. Upper- or lower case is irrelevant.
138 Recognized units are:
139 -- o "y" - one year (60*60*24*366)
140 o "m" - one month (60*60*24*31)
141 o "w" - one week (60*60*24*7)
142 o "d" - one day (60*60*24)
143 o "h" - one hour (60*60)
144 o "min" - one minute (60)
145 o "kb" - one kilobyte (1024)
146 o "mb" - one megabyte (1024*1024)
147 o "gb" - one gigabyte (1024*1024*1024)
148 o "kib" - one si kilobyte (1000)
149 o "mib" - one si megabyte (1000*1000)
150 o "gib" - one si gigabyte (1000*1000*1000)
153 @param ustr String containing a numerical value with trailing unit
154 @return Number containing the canonical value
158 Appends numerically indexed tables or single objects to a given table.
162 @param src Target table
163 @param ... Objects to insert
168 Combines two or more numerically indexed tables and single objects into one table.
172 @param tbl1 Table value to combine
173 @param tbl2 Table value to combine
174 @param ... More tables to combine
175 @return Table value containing all values of given tables
179 Checks whether the given table contains the given value.
183 @param table Table value
184 @param value Value to search within the given table
185 @return number indicating the first index at which the given value occurs
186 -- within table or false.
190 Update values in given table with the values from the second given table.
192 Both table are - in fact - merged together.
195 @param t Table which should be updated
196 @param updates Table containing the values to update
201 Retrieve all keys of given associative table.
205 @param t Table to extract keys from
206 @return Sorted table containing the keys
210 Clones the given object and return it's copy.
214 @param object Table value to clone
215 @param deep Boolean indicating whether to do recursive cloning
216 @return Cloned table value
220 Create a dynamic table which automatically creates subtables.
224 @return Dynamic Table
228 Recursively serialize given data to lua code, suitable for restoring
233 @param val Value containing the data to serialize
234 @return String value containing the serialized code
240 Restore data previously serialized with serialize_data().
244 @param str String containing the data to restore
245 @return Value containing the restored data structure
251 Return the current runtime bytecode of the given data. The byte code
253 will be stripped before it is returned.
256 @param val Value to return as bytecode
257 @return String value containing the bytecode of the given data
261 Strips unnescessary lua bytecode from given string. Information like line
263 numbers and debugging numbers will be discarded. Original version by
264 Peter Cawley (http://lua-users.org/lists/lua-l/2008-02/msg01158.html)
267 @param code String value containing the original lua byte code
268 @return String value containing the stripped lua byte code
272 Return a key, value iterator which returns the values sorted according to
274 the provided callback function.
277 @param t The table to iterate
278 @param f A callback function to decide the order of elements
279 @return Function value containing the corresponding iterator
283 Return a key, value iterator for the given table.
285 The table pairs are sorted by key.
288 @param t The table to iterate
289 @return Function value containing the corresponding iterator
293 Return a key, value iterator for the given table.
295 The table pairs are sorted by value.
298 @param t The table to iterate
299 @return Function value containing the corresponding iterator
303 Test whether the current system is operating in big endian mode.
307 @return Boolean value indicating whether system is big endian
311 Execute given commandline and gather stdout.
315 @param command String containing command to execute
316 @return String containing the command's stdout
320 Return a line-buffered iterator over the output of given command.
324 @param command String containing the command to execute
333 @param object String containing the ubus object to call
334 @param method String containing the ubus method to call
335 @param values Table containing the values to pass
336 @return Table containin the ubus result
340 Convert data structure to JSON
344 @param data The data to serialize
345 @param writer A function to write a chunk of JSON data (optional)
346 @return String containing the JSON if called without write callback
350 Returns the absolute path to LuCI base directory.
354 @return String containing the directory path
358 This is a coroutine-safe drop-in replacement for Lua's "xpcall"-function
362 @param f Lua function to be called protected
363 @param err Custom error handler
364 @param ... Parameters passed to the function
365 @return A boolean whether the function call succeeded and the return
366 -- values of either the function or the error handler
370 This is a coroutine-safe drop-in replacement for Lua's "pcall"-function
374 @param f Lua function to be called protected
375 @param ... Parameters passed to the function
376 @return A boolean whether the function call succeeded and the returns
377 -- values of the function or the error object