xcode - Retrieve Trash size as an int in cocoa app -


is possible cocoa app retrieve size of trash int. nstask correct method this?

there's no easy way this. although mac gui presents unified trash, there's not 1 thing trash. each volume can have separate trash , volumes can come , go.

also, can quite time-consuming calculate size of contents of folder, doesn't seem idea.

if want it, you'd enumerate of mounted volumes using -[nsfilemanager mountedvolumeurlsincludingresourcevaluesforkeys:options:], convert urls fsrefs using cfurlgetfsref(), volume reference number fsref using fsgetcataloginfo() passing kfscatinfovolume whichinfo, find trash each volume using fsfindfolder() passing ktrashfoldertype foldertype, convert resulting fsref url using cfurlcreatefromfsref(), create directory enumerator url using -[nsfilemanager enumeratoraturl:includingpropertiesforkeys:options:errorhandler: passing nsurltotalfileallocatedsizekey in keys array, enumerate through enumerator getting each item's nsurltotalfileallocatedsizekey nsnumber, , accumulating -unsignedlonglongvalues of nsnumbers.

it may easier enumerate volumes using fsgetvolumeinfo(), passing kfsinvalidvolumerefnum volume , index, starting @ 1, volumeindex. you'd pass kfsvolinfonone whichinfo. you'd increment index , repeat until returns nsverr. advantage gives volume reference number directly don't have go url fsref volume reference number. disadvantage 1 more old-style api. however, have no choice use apis because there's no substitute fsfindfolder() in above.

anyway, enumerate on volumes trash folders, have prepared encounter volumes don't have trash folders. example, network-mounted volumes don't.


Comments

Post a Comment

Popular posts from this blog

javascript - backbone.js Collection.add() doesn't `construct` (`initialize`) an object -

<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd"> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> <script src="http://documentcloud.github.com/underscore/underscore-min.js"></script> <script src="http://documentcloud.github.com/backbone/backbone-min.js"></script> </head> <body> <button id="cmd_create_event" name="cmd_create_event" type="button">create new `event`</button> <script type="text/javascript"> var eventmodel = backbone.model.extend({ initialize : function() { console.log("`event` initialized. id: " + this.cid); this.bind("change:status", function() { console.log(this.get("status") + " value `status`"); }); this.bind("error", function(model, e...
Read more

c++ - Accessing inactive union member and undefined behavior? -

i under impression accessing union member other last 1 set ub, can't seem find solid reference (other answers claiming it's ub without support standard). so, undefined behavior? the confusion c explicitly permits type-punning through union, whereas c++ ( c++11 ) has no such permission. c11 6.5.2.3 structure , union members 95) if member used read contents of union object not same member last used store value in object, appropriate part of object representation of value reinterpreted object representation in new type described in 6.2.6 (a process called ‘‘type punning’’). might trap representation. the situation c++: c++11 9.5 unions [class.union] in union, @ 1 of non-static data members can active @ time, is, value of @ 1 of non-static data members can stored in union @ time. c++ later has language permitting use of unions containing struct s common initial sequences; doesn't permit type-punning. to determine whether union type-punning is allowe...
Read more

php - Get uncommon values from two or more arrays -

is there function in php give array of uncommon values 2 or more arrays? for example: $array1 = array( "green", "red", "blue"); $array2 = array( "green", "yellow", "red"); .... $result = function_needed($array1, $array2,...); print_r($result); should give output: array("blue", "yellow", ...); use array_diff , array_merge : $result = array_merge(array_diff($array1, $array2), array_diff($array2, $array1)); here's demo. for multiple arrays, combine callback , array_reduce : function unique(&$a, $b) { return $a ? array_merge(array_diff($a, $b), array_diff($b, $a)) : $b; } $arrays = array( array('green', 'red', 'blue'), array('green', 'yellow', 'red') ); $result = array_reduce($arrays, 'unique'); and here's demo of that.
Read more