Re: 12 hr vs 24 hr time display
> On 3 Jan 2017, at 16:34, Sandor Szatmari <admin.szatmari@gmail.com> wrote: > > Jeremy, > >> On Jan 3, 2017, at 10:30, Jeremy Pereira >> <jeremy.pere...@aptosolutions.co.uk> wrote: >> >> >>> >> >> It seems obvious to me that method 1 only refers to the clock display in the >> menu bar and nothing else. It’s a sub setting of >> “Show date and time in the menu bar”. >> >> If you honour whatever preference is set by method 2 as your code fragment >> below does, you’ll be fine. >> > I feel like fewer people use/find method 2, simply stopping at method 1. > This may be a gross assumption on my part. Under my assumption they would > simply think my app doesn't display 24 hr time or respect the system setting. > Am I being to sensitive here? Yes, because they would also be thinking that all the other apps don’t respect 24 hour format including Finder windows. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: file url to string path
On 21 Nov 2013, at 00:01, Kyle Sluder k...@ksluder.com wrote: On Wed, Nov 20, 2013, at 03:26 PM, koko wrote: How does one turn this: file://localhost/Volumes/Macintosh%20HD/Included%20Free%20Designs/Aibnb18(colorized).pes http://lmgtfy.com/?q=NSURL Which leads you, via an enormous list to the -path method, which gives you the path part of the URL after unescaping it. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/jeremyp%40jeremyp.net This email sent to jere...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to implement readonly property
On 12 Nov 2012, at 20:45, Greg Parker gpar...@apple.com wrote: There is something special about statically-allocated memory. Statically-allocated memory has always been zero for the life of the process. Dynamically-allocated memory may have been non-zero at some point in the past (i.e. if it was previously part of a now-freed allocation). The problem is your condition #2. If the memory was previously non-zero and you set it to zero, you need appropriate memory barriers on some architectures to prevent a race where the caller of dispatch_once() sees the old non-zero value. Neither dispatch_once() nor the malloc system nor the Objective-C runtime promise to provide the correct barriers. In some cases you might be able to add an appropriate memory barrier to your -init... method, assuming that no calls to dispatch_once() occur before then. In practice this is a difficult race to hit, but it's not impossible. Sorry, I'm a bit late to the party here but I've just read this and I don't understand it. If this race condition really exists, you couldn't assume that *any* instance variables of a newly initialised object have been zeroed out. What am I missing? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Subclasses, protocols and properties - compiler warning
On 19 Nov 2010, at 14:38, Jonny Taylor wrote: I am encountering what I believe to be a spurious compiler warning. I wonder whether this is a clue that I am doing something differently to how I should do it. The problem comes if I define a protocol containing a property and then define that property in a base class that does NOT conform to the (whole) protocol. When I subclass that base class, I get warnings about how the property is not defined. // I find myself writing @dynamic genericProperty here to shut up the compiler warning // that reads warning: property 'genericProperty' requires method '-genericProperty' to be defined - use @synthesize, @dynamic or provide a method implementation It is my understanding that this is one of the reasons why @dynamic exists. i.e. I believe that you are already doing the Right Thing. From the docs You use the @dynamic keyword to tell the compiler that you will fulfill the API contract implied by a property either by providing method implementations directly or at runtime using other mechanisms such as dynamic loading of code or dynamic method resolution. It suppresses the warnings that the compiler would otherwise generate if it can’t find suitable implementations. You should only use it if you know that the methods will be available at runtime. Well you know the method will exist at run time since you know your class is a subclass of a class that implements it. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to empty the Trash programmatically?
On 16 Apr 2010, at 08:22, Graham Cox wrote: Don't. The only app that the user wants to empty the trash is Finder, not yours. If they want it emptied (or emptied securely), they'll go to the Finder and use the menu there. It's OK for your app to move stuff to the trash as long as it's clear to the user that will happen, but emptying it is not your business. The clue really is the fact that doing so is not supported directly by an API. +1 to that. Any application that emptied my Trash programmatically would find itself being the first new item in there. --Graham On 16/04/2010, at 4:45 PM, Oleg Krupnov wrote: But the progress-bar window will still pop up... On Fri, Apr 16, 2010 at 9:41 AM, Dave Keck davek...@gmail.com wrote: tell application Finder to empty trash without warns before emptying ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to empty the Trash programmatically?
On 16 Apr 2010, at 10:29, Matt Gough wrote: On 16 Apr 2010, at 09:46:27, Jeremy Pereira wrote: On 16 Apr 2010, at 08:22, Graham Cox wrote: Don't. The only app that the user wants to empty the trash is Finder, not yours. If they want it emptied (or emptied securely), they'll go to the Finder and use the menu there. It's OK for your app to move stuff to the trash as long as it's clear to the user that will happen, but emptying it is not your business. The clue really is the fact that doing so is not supported directly by an API. +1 to that. Any application that emptied my Trash programmatically would find itself being the first new item in there. To be fair though, if it is a user-initiated emptying and it is done via Finder, then I think it is fine to initiate a Trash emptying from another app. What isn't fine is for it to be done behind the user's back. I'll concede that point but then why waste time duplicating a piece of functionality that is easily accessible from the dock? Unless you are developing a dock/Finder replacement application. Matt Gough ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Using the #import directive
On 2 Apr 2010, at 00:59, Steve Cronin wrote: On Apr 1, 2010, at 5:58 PM, Jens Alfke wrote: On Apr 1, 2010, at 3:51 PM, Steve Cronin wrote: I have an import statement like the last example but I can't find any bar directory I'm unable to determine the particular instance of foo.h that is being used here… Select bar/foo.h and press Cmd-Shift-D (File Open Quickly). That should open the header. Then you can command-click the window title to see the path. —Jens Jens; Thanks for this and it did allow me to find the offending file. I now would like to specify a different remote source for a few headers. I have set 'Header Search Paths to $(SRCROOT)/../../dir1/dir2 (recursive checked) I can't seem to figure out how to refer to them in the #import statement… #import dir2/foo.h -- no such #import /foo.h-- no such file.. How do I do this? Have you tried #import foo.h yet? Thanks for helping out here! Steve___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Main thread crash
On 23 Mar 2010, at 16:17, Arun wrote: How does NSZombies help in resolving the crash? Can anyone explain please. http://developer.apple.com/mac/library/technotes/tn2004/tn2124.html#SECFOUNDATION It was surprisingly hard to track down that link using Google. In the end I got it with the following search term: nszombieenabled site:developer.apple.com -Arun On Tue, Mar 23, 2010 at 7:10 PM, Scott Ribe scott_r...@killerbytes.comwrote: You've either over-released something that the timer refers to, so that it's not there when the timer fires. Or you have left the timer running after it should have been. If it's not just that you, for instance, forgot to stop the timer when closing a window or dealloc'ing a window controller, then you'll want to run with NSZombies. -- Scott Ribe scott_r...@killerbytes.com http://www.killerbytes.com/ (303) 722-0567 voice ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: User-space threads and NSAutoreleasePool
On 18 Mar 2010, at 06:41, BJ Homer wrote: On Wed, Mar 17, 2010 at 11:47 PM, Greg Guerin glgue...@amug.org wrote: doing one transaction updating 400-500 records.) Hence, we pipeline the HTTP requests, starting transfer of the second before the first one is finished. There are a large number of servers that don't handle pipelining, but we'll only we talking to one particular server, and we know it does. NSURLConnection does not (according to various mailing list messages) implement pipelining, allegedly due to the lack of server support. There's some suggestion that CFHTTPStream does support pipelining, but there's little to no documentation about it, and I don't know if it will handle 500 at once. It seems to me that you can accomplish what you want using just two normal threads. Open a TCP connection to port 80 on the server Create a read thread and a write thread. The write thread takes all the requests passed to it and writes them to the TCP connection using synchronous IO as fast as the connection will accept data. After each request has been written, the thread puts it in an awaiting response queue. The read thread reads the TCP connection using synchronous IO and deserialises the responses as they come in. for each response, it takes the first request off the awaiting response queue and deals with it. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Detecting if you're being debugged
On 18 Mar 2010, at 11:48, Peter Hudson wrote: Technical QA QA1361 Detecting the Debugger Does this code report on my app being debugged by any third party, even when the app has been stripped of symbols ? Would it work irrespective of the debugging tool used ? Did you read the warning at the bottom of the page? http://developer.apple.com/mac/library/qa/qa2004/qa1361.html IMPORTANT: Because the definition of the kinfo_proc structure (in sys/sysctl.h) is conditionalized by__APPLE_API_UNSTABLE, you should restrict use of the above code to the debug build of your program. This suggests you should not put the example code in the release builds of your program. Peter ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSComboBox problem in 10.6.2
On 19 Mar 2010, at 12:45, H. Miersch wrote: It appears you are sending -selectItemAtIndex: to the combo box, Correct. I tell it to select the first item (index 0). And when I put the list if items in the nib file (no data source) it works. But this morning I quickly inserted an nslog to find out how big the symbols array is, and it reported zero. Now the question is, why does the count come back as zero? Looks like I have some investigation to do. Good thing the weekend is just around the corner... Did you try sending -reloadData to the combo box after setting up the data source and before trying to access items in the combo box? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Case sensitive fileName
On 17 Mar 2010, at 13:35, gMail.com wrote:
Hi, I have a file path
/Folder/filename.txt
The API fileExistsAtPath says that it exists.
Now I need to get its real case sensitive file name, which is indeed e.g.
FileName.txt
How can I get it in a fast way? I thought by its inode, but I can't really
know how to do that.
The following seems to work on 10.6
NSString* path = @/etc/HOSTS;
NSURL* url = [NSURL fileURLWithPath: path];
NSError* error = nil;
NSArray* keysIWant = [NSArray arrayWithObject: NSURLNameKey];
NSDictionary* resources = [url resourceValuesForKeys: keysIWant error:
error];
if (resources != nil)
{
NSString* actualPath = [resources objectForKey: NSURLNameKey];
NSLog(@%@, actualPath);
}
Gives output: hosts
I know I can iterate along the contents of the parent directory and do a
case insensitive match of each item, but this is too long. I need to check
thousands files. Any fast idea?
Regards
--
Leonardo
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Re: Case sensitive fileName
On 17 Mar 2010, at 16:07, Jens Alfke wrote: On Mar 17, 2010, at 6:35 AM, gMail.com wrote: Now I need to get its real case sensitive file name, which is indeed e.g. FileName.txt How can I get it in a fast way? I thought by its inode, but I can't really know how to do that. Have you tried -[NSString stringByStandardizingPath], or the BSD function realpath()? The docs don’t explicitly say they correct case, but it seems like the kind of thing they would do. The code: const char* path = /etc/HOSTS; char realPath[PATH_MAX + 1]; memset(realPath, 0, PATH_MAX + 1); printf(%s\n, realpath(path, realPath)); gives output /private/etc/hosts so, depending on the application, it might be working too well as it resolves symlinks. —Jens___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSTimer never being deallocated
On 13 Mar 2010, at 23:56, Tobias Jordan wrote: Hi Paul, You said 'an object you don't manage' -- If I alloc/init an instance of NSTimer I am responsible for this object, in my opinion. Until you release it. After that, you are not responsible for it. That doesn't mean that something else hasn't taken over responsibility. That's why I tried to do everything properly. You see I am actually really just trying to prevent memory leaks and I see lots of leaks in sample code I am downloading somewhere. That's the reason I am so careful. Let's just close the topic here, I thank everyone for the explanations, I appreciate all of them! Best regards, Tobias Jordan. On Mar 13, 2010, at 9:53 PM, Paul Sanders wrote: I don't understand all the confusion on this issue. The NSTimer documentation makes the life-cycle of this object very clear. Until it goes away, it is probably retained by the runloop. As Joar says, you often can't make any concrete predictions about when an object you don't manage yourself might be released for the last time, but if you put a breakpoint on [NSTimer dealloc] you will be able to see it when it happens. Paul Sanders. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: IsReadableFileAtPath
On 8 Mar 2010, at 11:32, gMail.com wrote: Hi, thanks to all of you. After some days trynign and thinking, I have used lstat to check the filePermissions because I need to check thousands files per session. However I realized that Permissions and isReadableFile or isWritableFile or isDeletableFile are two different things, so please may you tell me whether my methods here below are right or wrong? Short version: That depends on the semantics you want for isReadableFile: and isWriteableFile: The code as written checks if the owner of the file can read or write it. However, you probably want to know if the currently running process can read or write it which may have a different answer if the owner of the process is not the same as the owner of the file. isDeleteableFile: is wrong. You need to check whether you have write access to the directory containing the file. See below script: monica:~ jeremyp$ mkdir foo monica:~ jeremyp$ cd foo monica:foo jeremyp$ touch foo monica:foo jeremyp$ chmod -w . monica:foo jeremyp$ ls -la total 0 dr-xr-xr-x3 jeremyp staff 102 8 Mar 11:49 . drwx--+ 115 jeremyp staff 3910 8 Mar 11:49 .. -rw-r--r--1 jeremyp staff 0 8 Mar 11:49 foo monica:foo jeremyp$ rm foo rm: foo: Permission denied IsReadableFile:filePath cPath = [mManager fileSystemRepresentationWithPath:filePath]; lstat(cPath, sb); return ((sb.st_mode S_IRUSR) != 0); IsWritableFile:filePath //I check here the ParentFolder of the filePath parentFolder = [filePath stringByDeletingLastPathComponent]; cPath = [mManager fileSystemRepresentationWithPath:parentFolder]; lstat(cPath, sb); return ((sb.st_mode (S_IWUSR | S_IXUSR)) != 0); IsDeletableFile:filePath the same as IsWritableFile:filePath above Will these methods work on any volume mounted on my desktop? (e.g. Local volume, remote volume, disk image volume, on webdav, smb, ftp, afp, hfs, on remote win disk...) Thanks Leo Da: Kevin Perry kpe...@apple.com Data: Mon, 1 Mar 2010 11:37:06 -0800 A: gMail.com mac.iphone@gmail.com Cc: cocoa-dev@lists.apple.com Oggetto: Re: IsReadableFileAtPath -Kevin On Mar 1, 2010, at 11:20 AM, gMail.com wrote: Hi, I need to check whether a file or a symlink could be really copied. I have just seen that the Cocoa API isReadableFileAtPath traverses the symlink, so, in case the target file is not readable, my app doesn't copy the symlink, while the Finder can properly do. So my app does wrong. The question is: How can I understand whether a file or symlink can really be copied? I have seen that isReadableFileAtPath uses the C command access which indeed traverses the symlink. So I cannot use it. So, any idea? And I wouldn't use the Carbon APIs because I need to compile for 64 bit. Thank you. Leonardo ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/kperry%40apple.com This email sent to kpe...@apple.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: super call in the middle of a block of code ..
On 19 Feb 2010, at 18:06, Clark Cox wrote:
On Fri, Feb 19, 2010 at 8:15 AM, Roland King r...@rols.org wrote:
why would that leak it? Those calls are paired, a table enters editing mode,
the variable is set and what it's set to is retained, when the table exits
editing mode again the cached value is released and nil'ed. The variable is
also released in dealloc (not shown here). I do not know of a case where
setEditing is called with YES twice without an intervening setEditing:NO.
Just because you don't know of a case doesn't mean that you shouldn't
be prepared for it. If I were you, I would do something like:
I agree. Except I would create an accessor for preEditPath so the code becomes:
-(void)setEditing:(BOOL)editing animated:(BOOL)animated
{
if(editing) {
[self setPreEditPath: [[self tableView] indexPathForSelectedRow]];
}
[super setEditing: editing animated: animated];
if(!editing [self preEditPath] != nil) {
[[self tableView] selectRowAtIndexPath: preEditPath animated: YES
scrollPosition: UITableViewScrollPositionNone];
[self setPreEditPath: nil];
}
}
That is, release preEditPath in the editing case before setting it, to
avoid a leak in the case you are called twice with a value of YES, as
well as avoid passing a nil preEditPath to
-selectRowAtIndexPath:animated:scrollPosition: in the case that you
are called twice with a value of NO.
--
Clark S. Cox III
clarkc...@gmail.com
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Re: always show warnings?
On 9 Feb 2010, at 15:37, Joar Wingfors wrote: On 8 feb 2010, at 00.05, Mario Emmenlauer wrote: I'm not using XCode, however it sounds likely that the object files are just not rebuilt? You say it happens at every build except the first time? The compiler will only rebuild objects that are not up- to-date, so you will see only the warnings for those. Are you sure you are using rebuild and not build? Try a clean first (or remove the output manually), see if that helps. If this is indeed the problem, then there is no other solution. You have to compile all sources in order to see all warnings, but that means you have to wait longer (because compiling is slow). The restrictions and workarounds you mention here doesn't apply to Xcode 3.2 - Xcode now remember the last build results for all files, allowing you to see not only the sets of results from the last build operation, but also the latest sets of results for all files in the project (regardless of if they were processed in the last build operation or not). As I remember, in Xcode 3.1 there was an errors and warnings group in the project window. The warnings from previous builds did persist there, presumably until the source file they came from was recompiled (or Xcode was restarted). j o a r ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Cloning an NSXMLElement and its children?
On 3 Feb 2010, at 00:28, Robert Monaghan wrote: Its a fairly deep copy. There are several nodes deep. I am trying to copy parts of the tree, so that I don't have to write code to regenerate them. No. The question was not is your tree deep? but is the copy method implemented by NSXMLNode a deep or shallow copy i.e. does it copy the children of the node too or just reference the existing ones. If it's a deep copy, you should be able to do copyNode = [node copy]; bob. On Feb 2, 2010, at 4:26 PM, Jens Alfke wrote: On Feb 2, 2010, at 4:16 PM, Robert Monaghan wrote: Is there an easy way to clone an XML tree in Cocoa? Or will I be going thru recursion code hell? Did you try -copy? NSXMLNode implements NSCopying. The only question is whether it's a deep or a shallow copy. —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSDictionary trouble
On 19 Jan 2010, at 23:06, Jens Alfke wrote:
On Jan 19, 2010, at 10:46 AM, Kirk Kerekes wrote:
NSDictionary will use almost any object as a key:
From the docs:
In general, a key can be any object (provided that it conforms to the
NSCopying protocol...)
-- and if it is an immutable object, that -copy is just a -retain.
Yes, but he said he wants to use a view as the key. Views are not immutable,
and do copy themselves in response to -copy. Having a dictionary whose key
objects are copies of your live views is not very useful. (Especially since
the copied view will have a different hashcode from the original one, so you
can't even look it up using the original view anymore...)
Well he could write a category to give him an object that satisfies all the
criteria e.g (written in Mail).
@interface NSView(DictionaryKey)
-(NSNumber*) dictionaryKey;
@end
@implementation NSView(DictionaryKey)
-(NSNumber*) dictionaryKey
{
return [NSNumber numberWithUnsignedLongLong: (unsigned long long) self];
}
@end
Then he could do things like:
[myDictionary setObject: foo forKey: [myView dictionaryKey]];
...
bar = [myDictionary objectForKey [myView dictionaryKey]];
The above creates a key based on the address of the NSView.
—Jens___
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Re: NSDictionary trouble
On 19 Jan 2010, at 16:53, Shawn Rutledge wrote: I'm accustomed to things like Qt and Java where hashtables can contain anything for both key and value. This is not true (at least for Java and probably for QT for the same reason). From the API docs for the Map abstract class: Note: great care must be exercised if mutable objects are used as map keys. The behavior of a map is not specified if the value of an object is changed in a manner that affects equals comparisons while the object is a key in the map. From the docs for Object.hashCode() Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. The Cocoa restriction on keys actually makes things a little easier. For instance, you can use NSMutableString as a key in an NSDictionary with no problems. However, if you try to use a StringBuffer or StringBuilder as a key in a Java map, you won't get the natural behaviour - two distinct StringBuffers with the same character sequence in them do not compare equal and if you override equals() in a subclass to make sure they do, you'd better not change a StringBuffer that happens to be a key in a map.___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iPhone: NSXMLParser problems
Trying again, the HTML markup in the previous version of this e-mail sent the
size over the list limit. Apologies if the original also turns up
I created a little test program to run the XML through a parser and mine worked
which was a bit mystifying until I figured out what the problem is.
getWeatherXmlForZipCode: is a class method. You have set the delegate to the
class not to an object of the class.
On 5 Jan 2010, at 15:58, Eric E. Dolecki wrote:
http://weather.yahooapis.com/forecastrss?p=01701
(For an example)
Here is all the code in question:
+(NSString*)getWeatherXmlForZipCode: (NSString*)zipCode {
+ means class method
snip
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
[parser setDelegate:self];
self in a class method is the class itself.
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict
- means not a class method.
I attach my little test program for completeness and the output. There's no
error checking or anything that would make it production quality.
#import Foundation/Foundation.h
@interface MyParser : NSObject NSXMLParserDelegate
{
}
-(void) parse: (NSString*) urlString;
@end
@implementation MyParser
-(void) parse: (NSString*) urlString
{
NSURL* url = [[NSURL alloc] initWithString: urlString];
NSXMLParser* parser = [[NSXMLParser alloc] initWithContentsOfURL: url];
[url release];
[parser setDelegate: self];
[parser setShouldProcessNamespaces: YES];
[parser setShouldReportNamespacePrefixes:YES];
[parser setShouldResolveExternalEntities:YES];
[parser parse];
[parser release];
}
-(void) parser: (NSXMLParser *) parser
didStartElement: (NSString*) elementName
namespaceURI: (NSString*) namespaceURI
qualifiedName: (NSString*) qualifiedName
attributes: (NSDictionary*) attributeDict
{
NSLog(@element %@, ns %@, qn %@, elementName, namespaceURI,
qualifiedName);
}
@end
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
MyParser* parser = [[MyParser alloc] init];
[parser parse: @http://weather.yahooapis.com/forecastrss?p=01701;];
[parser release];
[pool drain];
return 0;
}
2010-01-06 14:46:49.410 TestNSXMLParser[17401:a0f] element rss, ns , qn rss
2010-01-06 14:46:49.412 TestNSXMLParser[17401:a0f] element channel, ns , qn
channel
2010-01-06 14:46:49.412 TestNSXMLParser[17401:a0f] element title, ns , qn title
2010-01-06 14:46:49.412 TestNSXMLParser[17401:a0f] element link, ns , qn link
2010-01-06 14:46:49.412 TestNSXMLParser[17401:a0f] element description, ns , qn
description
2010-01-06 14:46:49.413 TestNSXMLParser[17401:a0f] element language, ns , qn
language
2010-01-06 14:46:49.413 TestNSXMLParser[17401:a0f] element lastBuildDate, ns ,
qn lastBuildDate
2010-01-06 14:46:49.413 TestNSXMLParser[17401:a0f] element ttl, ns , qn ttl
2010-01-06 14:46:49.413 TestNSXMLParser[17401:a0f] element location, ns
http://xml.weather.yahoo.com/ns/rss/1.0, qn yweather:location
2010-01-06 14:46:49.414 TestNSXMLParser[17401:a0f] element units, ns
http://xml.weather.yahoo.com/ns/rss/1.0, qn yweather:units
2010-01-06 14:46:49.414 TestNSXMLParser[17401:a0f] element wind, ns
http://xml.weather.yahoo.com/ns/rss/1.0, qn yweather:wind
2010-01-06 14:46:49.414 TestNSXMLParser[17401:a0f] element atmosphere, ns
http://xml.weather.yahoo.com/ns/rss/1.0, qn yweather:atmosphere
2010-01-06 14:46:49.414 TestNSXMLParser[17401:a0f] element astronomy, ns
http://xml.weather.yahoo.com/ns/rss/1.0, qn yweather:astronomy
2010-01-06 14:46:49.414 TestNSXMLParser[17401:a0f] element image, ns , qn image
2010-01-06 14:46:49.415 TestNSXMLParser[17401:a0f] element title, ns , qn title
2010-01-06 14:46:49.415 TestNSXMLParser[17401:a0f] element width, ns , qn width
2010-01-06 14:46:49.415 TestNSXMLParser[17401:a0f] element height, ns , qn
height
2010-01-06 14:46:49.415 TestNSXMLParser[17401:a0f] element link, ns , qn link
2010-01-06 14:46:49.415 TestNSXMLParser[17401:a0f] element url, ns , qn url
2010-01-06 14:46:49.415 TestNSXMLParser[17401:a0f] element item, ns , qn item
2010-01-06 14:46:49.416 TestNSXMLParser[17401:a0f] element title, ns , qn title
2010-01-06 14:46:49.416 TestNSXMLParser[17401:a0f] element lat, ns
http://www.w3.org/2003/01/geo/wgs84_pos#, qn geo:lat
2010-01-06 14:46:49.416 TestNSXMLParser[17401:a0f] element long, ns
http://www.w3.org/2003/01/geo/wgs84_pos#, qn geo:long
2010-01-06 14:46:49.417 TestNSXMLParser[17401:a0f] element link, ns , qn link
2010-01-06 14:46:49.417 TestNSXMLParser[17401:a0f] element pubDate, ns , qn
pubDate
2010-01-06 14:46:49.417 TestNSXMLParser[17401:a0f] element condition, ns
http://xml.weather.yahoo.com/ns/rss/1.0, qn yweather:condition
2010-01-06 14:46:49.417
Re: NSXMLParser question about duplicate nodes
On 6 Jan 2010, at 16:22, Eric E. Dolecki wrote: I am fetching weather data in my results I am getting today and tomorrow's forecasts. However they have the same node: yweather:forecast day=Wed ... / yweather:forecast day=Thu .../ How can I get at those separately in my didStartElement? Is there a way to turn that into an array or something? No they don't have the same node. They are two nodes with the same element name. If both appear in your XML they will each result in a call to the parser:didStartElement:... method. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSXMLParser question about duplicate nodes
On 6 Jan 2010, at 18:13, Eric E. Dolecki wrote: Well okay yes... same element name but I need to tell them apart. The day attribute has a different value in each case though. Just pull out the the object with the key @day from the attribute dictionary. On Wed, Jan 6, 2010 at 1:07 PM, Jeremy Pereira postmas...@jeremyp.net wrote: On 6 Jan 2010, at 16:22, Eric E. Dolecki wrote: I am fetching weather data in my results I am getting today and tomorrow's forecasts. However they have the same node: yweather:forecast day=Wed ... / yweather:forecast day=Thu .../ How can I get at those separately in my didStartElement? Is there a way to turn that into an array or something? No they don't have the same node. They are two nodes with the same element name. If both appear in your XML they will each result in a call to the parser:didStartElement:... method. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net -- http://ericd.net Interactive design and development ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iPhone: NSXMLParser problems
On 5 Jan 2010, at 05:09, Eric E. Dolecki wrote:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict {
NSLog(@didStartElement);
//not sure how to handle namespaces in obj-c
if( [elementName isEqualToString:@yweather:condition]){
NSString *thisOwner = [attributeDict objectForKey:@text];
NSLog(@%@, thisOwner);
}
}
I'm fairly sure that, if you are processing namespaces, elementName will not
have the prefix when it comes in. Instead, the parser will maintain a mapping
between the namespace URI and the prefix. You need to test that the passed in
namespaceURI matches the URI you are interested in and the elementName is the
element name you are interested in.
qName will contain the prefix, but if you use that to do the test, you'll have
to track how the prefixes are currently mapped (there's a delegate method to
help you with that), parse out the prefix and look up its namespace. The reason
is that for any given element you can't guarantee that the condition element
will always be prefixed by yweather, it depends on the previous xmlns
mapping, nor can you guarantee that the yweather prefix always refers to the
namespace for Yahoo weather XML, nor can you even guarantee there will even be
a prefix e.g.
condition xmlns=http://yahoo.weather.namespace;
is perfectly acceptable.
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Re: Setting NSWindow titlebar height
On 3 Jan 2010, at 19:41, PCWiz wrote: I have a window that looks like this right now: http://img22.imageshack.us/img22/2953/screenshot20100103at123.png I've removed the titlebar buttons and everything Why? How does the user make the Window go away/hide without the title bar buttons? Perhaps I'm being unfair since I don't know what this window is for, but it seems like a huge waste of time and energy to try to do difficult things that break the Apple human interface guidelines. , however there is still that space at the top where the titlebar usually is. Is there a way to remove that space (in other words, a way to set the height of the title bar?). Moving up the NSToolbar would work too, is that possible? Independent Cocoa Developer, Macatomy Software http://macatomy.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Detect dim/brightness keys on laptop
On 25 Dec 2009, at 14:01, John Clayton wrote: My aim is to write a little util that swaps the function keys depending on which app is running (i.e. so that during certain apps you don't have to use the FN key on the laptop to get F1). So I need to have the ability to modify the event stream - e.g. exactly what event taps provides. I would suggest you don't bother. There's a setting in the keyboard preferences that changes the behaviour of the function keys and it's better (in my opinion) to let your users decide for themselves how the keyboard should be set up.___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ipp help - need advice
IPP is an open standard. The spec is available on the Internet. The relevant RFCs are 2910 and 2911. On 15 Dec 2009, at 23:42, Development wrote: I have constructed a url request to send a png file to a ipp printer to be printed. The problem is that I get a Bad Request error when I post it. I am wondering if some one that knows how to construct a correct ipp job request would look at my code and point out what I have done wrong. I know that printing from an iPhone is a huge secret that no one wants to share but I hope that I can get one of you to share the ipp job request format so I can do this.___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: App works when launched from Xcode, not from Finder
On 16 Dec 2009, at 04:05, PCWiz wrote: Here's the screen capture that demonstrates this issue: http://www.vimeo.com/8208563 This time around, I got a few errors logged in Console: *** -[NSRecursiveLock unlock]: lock (NSRecursiveLock: 0x16c2340 '(null)') unlocked from thread which did not lock it *** Break on _NSLockError() to debug. *** -[NSRecursiveLock unlock]: lock (NSRecursiveLock: 0x16c2340 '(null)') unlocked when not locked *** Break on _NSLockError() to debug. *** -[NSRecursiveLock finalize]: lock (NSRecursiveLock: 0x16c2340 '(null)') finalized while still in use *** Break on _NSLockError() to debug. *** -[NSRecursiveLock finalize]: lock (NSRecursiveLock: 0x16ca9c0 '(null)') finalized while still in use *** Break on _NSLockError() to debug. I've gotten these before, and they don't seem to affect the operation of the app so I doubt this is what's causing my problem, however I have set a breakpoint on _NSLockError to catch this next time (It happens randomly, not all the time). OK I watched your video. Why are you ignoring the two lines above the recursive lock error that are saying two libraries can't be loaded? __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Does NSData rearrange the order of bits?
On 30 Nov 2009, at 20:32, Brad Gibbs wrote: Another list member mailed me an explanation offline, causing me to look for and find the real problem preventing my code from running. Any chance of posting the off list response back to the list? It would improve the usefulness of the list archives (unless the person replied off list because the reply was off topic) to have a complete record of all the answers to your query. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iterating and removing objects from a collection
On 30 Nov 2009, at 21:21, Ken Thomases wrote:
On Nov 30, 2009, at 2:45 PM, Dennis Munsie wrote:
I run into this all the time where I need to iterate through an
NSMutableArray (or set, etc, etc) and remove some of the items. My normal
pattern has been this:
NSMutableSet *removeSet = [[NSMutableSet alloc] init];
for(NSObject *foo in myArray) {
if(needToRemoveFoo) {
[removeSet addObject:foo];
}
}
for(NSObject *foo in removeSet) {
[myArray removeObject:foo];
}
[removeSet release];
Some alternatives:
* Iterate over the array just using an index, rather than fast enumeration
(or NSEnumerator). Then, you can mutate the array as you go, so long as
you're careful about the index. (If you remove an item on a given pass
through the loop, then you shouldn't increment the index on that pass.)
* Collect the items to be removed by index into an NSMutableIndexSet and then
use -removeObjectsAtIndexes: to remove them.
* Use -filterUsingPredicate:, if it's a good match for what you're trying to
do
Another alternative
NSMutableArray* newArray = [[NSMutableArray alloc] init];
for (NSObject* foo in myArray)
{
if (!needToRemoveFoo)
{
[newArray addObject: foo];
}
}
[self setMyArray: newArray];
Might be better if the assumption that adding objects to the end of an array is
faster than removing them from the middle holds and the app can take the memory
overhead of two possibly identical arrays for a brief period of time.
Cheers,
Ken
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Re: My try/catch block isn't catching exceptions on 10.6
On 26 Nov 2009, at 23:51, Mark Allan wrote:
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0010
Crashed Thread: 3
You can't catch that with an Objective C exception handler. It's a Unix bus
error. Probably some pointer has changed under your code.
// We don't really care if imminentList changes because the dictionary
object will always be there even if the contents aren't.
Yes you do. NsMutableDictionary methods are not thread safe. If you have
other threads changing imminentList, while this thread is inserting stuff,
you'll need locking.
[self getLock4itemList];
@try{
[listToCopyFrom retain];
int counter = 0;
for (counter=0; counter [listToCopyFrom count]; counter++) {
NSString *theKey = [listToCopyFrom
objectAtIndex:counter];
if(theKey != nil){
if ( ([myItemList objectForKey:theKey] == nil)
([imminentList objectForKey:theKey] == nil)) {
[myItemList setObject:[NSNumber
numberWithLongLong:-1] forKey:theKey];
}
else{
//theKey already exists, don't add it
again
}
}
}
[listToCopyFrom removeAllObjects]; // remove all the
objects so we don't see them again next time around
[listToCopyFrom release]; // counteracts
the retain at start of this method
}
@catch (NSException *e) {
NSLog(@Splat! Reason: %@, [e reason]);
}
[self releaseLock4itemList];
}
Looking at the above code, I don't think there is anything in it that could
throw an exception that you would want to handle. sending objectToKey: to
listToCopyFrom could raise an exception if it has become shorter between the
loop test and sending the message, but that's a programmer error. Sending
setObject:forKey: could throw an exception if the NSNumber is nil, but that
would mean virtual memory exhaustion, what are you going to do if you catch an
out of memory condition? So I think your try catch block is superfluous in
this instance.
However, if there was an code that could throw an exception you wanted to
handle, your block currently leaks an object reference, because the exception
would bypass [listToCopyFrom release]. I tend to use the following idiom:
[anObject retain];
@try
{
// do stuff that might throw an Objective C exception
}
@catch (NSException* e)
{
// handle the exception
}
@finally
{
[anObject release];
}
Thanks
Mark
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Re: An Array of structs
On 27 Nov 2009, at 11:35, John Love wrote:
I get Initializer element is not constant. This pertains to the NSString*
because if I directly substitute the following, no compile error happens:
YearAmt gTest[] = {{@testy, 10}
What fundamental pertaining to C or C++ am I not getting?
You can't have non constant elements in struct initialisers, testy is not a
constant. The error message spells out exactly what the issue is.
This is not, by the way, an NSString specific issue. The following gives the
same error
typedef struct Foo
{
int foo;
} Foo;
int anInt = 6;
Foo fooArray[] = {{ anInt }};
Use of the const keyword doesn't help.
John Love
Touch the Future! Teach!
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Re: asl_log aborts the program?
On 20 Nov 2009, at 06:33, Chris Idou wrote: I've got a report from a user of my program crashing. In the console they are getting this: 11/19/09 3:08:46 PM[0x0-0x18a18a]Progname[8699]Progname(8699,0x1167b) malloc: *** error for object 0x100563870: pointer being freed was not allocated 11/19/09 3:08:46 PM[0x0-0x18a18a] Progname[8699]*** set a breakpoint in malloc_error_break to debug Thread 2 Crashed: 0 libSystem.B.dylib 0x7fff87a7784d usleep$NOCANCEL + 0 1 libSystem.B.dylib 0x7fff87a96e3c abort + 93 2 libSystem.B.dylib 0x7fff879ae155 free + 128 3 libSystem.B.dylib 0x7fff879fa16e asl_set_query + 572 4 libSystem.B.dylib 0x7fff87a16239 asl_send + 824 5 libSystem.B.dylib 0x7fff87a15e56 asl_vlog + 570 6 libSystem.B.dylib 0x7fff87a15c19 asl_log + 153 7 Progname.CocoaTools0x000104567101 -[Log vlogLevel:format:arguments:] + 270 8 Progname.CocoaTools0x00010456730c -[Log notice:] + 164 etc Does this look like an Apple bug? It looks to me like the asl subsystem is freeing something it shouldn't and aborting the program. Normally when I see crashes involving calls to methods with format strings, I immediately assume that the arguments following the the format string do not match the format specifiers in the format string. e.g. if -[Log notice:] is declared like this -(void) notice: (NSString*) format, ...; [log notice: @blah blah blah %@ %s, blah]; The above line has an NSObject missing from its argument list. There's also [log notice: someNSStringofIndeterminateOrigin]; which may crash if the string contains format specifiers e.g. if it is a URL with % escapes in it. So you probably want to check your calls to -[Log notice:]. __ Win 1 of 4 Sony home entertainment packs thanks to Yahoo!7. Enter now: http://au.docs.yahoo.com/homepageset/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Performance
On 16 Nov 2009, at 06:14, Chris Carson wrote: The application runs pretty well, and running it through the Leaks instrument there are no leaks except for 16-bytes when the application is first starting caused by IOUSBLib. However, looking at it in the Activity Monitor, the real memory used starts off at 25 MB and steadily grows to 250+ MB while the virtual memory starts off at about the same and steadily grows to about the same or sometimes close to 500MB, over the course of several minutes. This especially happens if I don't move the mouse for a while, or don't have the application in focus. As soon as a move the mouse or bring the application into focus, it's as if an autorelease pool is drained and the memory drops back down to 30-40MB real and 30-40MB virtual. This is annoying since the application hangs for 5 seconds or so when this memory draining is occurring. Has anyone dealt with this before? Any ideas on what could be causing this and how to work around it? It always used to be the case that NSTimer firings didn't count as real events so the autorelease pool didn't drain if the only events in your app were timer events. As soon as you do something to fire a real event e.g. move the mouse or bring the app to the front, the autorelease pool drains. I guess the work around would be to create your own pool at the beginning of the timer firing code and drain it at the end. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: -[NSString stringWithCString:encoding:] memory management question
On 11 Nov 2009, at 19:58, Hank Heijink (Mailinglists) wrote:
Hi all,
I've run into a funny crash when using -[NSString
stringWithCString:encoding:]. The code in question runs in the iPhone
Simulator. I haven't found anything on the web about this, but I found out
some things by experimenting. I have a workaround, but I'm curious what's
going on. I'd be very interested to hear your thoughts on this - apologies
for the lengthy post!
This is the relevant piece of code - I'm sorry I can't post it in full (NDA
prohibits):
nTags = 15;
unsigned long metadataTags[] = { /* fifteen tags defined in some
library */ };
NSMutableDictionary *tempDict = [[NSMutableDictionary alloc]
initWithCapacity:nTags];
for (NSUInteger i = 0; i nTags; i++) {
unsigned long pcLength = 0;
if (getLengthOfMetaData(fileHandle, metadataTags[i], 0,
pcLength) != 0) continue;
Religious rant first:
The above line is an abomination in my opinion. What's wrong with
if (getLengthOfMetaData(fileHandle, metadataTags[i], 0, pcLength) ==
0) {
// rest of loop code
}
// pcLength is now the required buffer size.
// Fill the buffer with metadata (and make room for a \0)
unsigned char *pBuffer = malloc(pcLength + 1);
if (getMetadata(fileHandle, metadataTags[i], pBuffer, pcLength)
== 0) {
pBuffer[pcLength] = '\0';
NSString *key = [[NSString alloc] initWithFormat:@%d,
metadataTags[i]];
NSString *contents = [[NSString alloc]
initWithCString:(const char *)pBuffer encoding:NSASCIIStringEncoding];
[tempDict setValue:contents forKey:key];
I think this should be[tempDict setObject:contents forKey:key];
[key release];
[contents release];
}
free(pBuffer);
}
_metaData = [[NSDictionary alloc] initWithDictionary:tempDict];
[tempDict release];
The other observation I would make is are you sure that getMetadata()
completely fills your buffer from zero to pBuffer, because if it doesn't it
could leave some garbage non ASCII bytes in it. This, in turn would cause
initWithCString:encoding: to return nil when using the ASCII encoding. I would
allocate the buffer like this:
pBuffer = (unsigned char*) calloc(pcLength + 1, sizeof(unsigned char));
which zeros the whole buffer. Thus copying any amount of non nul ASCII chars
= pcLength will automatically result in a C string.
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Re: -[NSString stringWithCString:encoding:] memory management question
On 12 Nov 2009, at 14:23, Hank Heijink (Mailinglists) wrote:
On Nov 12, 2009, at 5:59 AM, Jeremy Pereira wrote:
for (NSUInteger i = 0; i nTags; i++) {
unsigned long pcLength = 0;
if (getLengthOfMetaData(fileHandle, metadataTags[i], 0,
pcLength) != 0) continue;
Religious rant first:
The above line is an abomination in my opinion. What's wrong with
if (getLengthOfMetaData(fileHandle, metadataTags[i], 0, pcLength) ==
0) {
// rest of loop code
}
Matter of taste, in my opinion. There's nothing wrong with your version
either.
That's why I prefixed it with Religious Rant. I prefer my version because
the control structure is made explicit i.e. it is obvious at a glance (with
proper indentation) that all the code below the line with if on it is
conditional.
[tempDict setValue:contents forKey:key];
I think this should be[tempDict setObject:contents forKey:key];
Why is that? The only difference between setValue:forKey: and
setObject:forKey: is that the former uses the latter unless value is nil, in
which case the key will be removed. Come to think of it, using
setObject:forKey: will give me the advantage of raising an exception if I try
to add nil to the dictionary instead of failing silently - I think I'll
switch. Thanks!
That shows that one should check the docs before saying something. I always
thought setValue:forKey: was only for use with key-value coding but the docs
for NSMutableDictionary seem to imply you can also use it in the more general
way as you are doing.
[tempDict release];
The other observation I would make is are you sure that getMetadata()
completely fills your buffer from zero to pBuffer, because if it doesn't it
could leave some garbage non ASCII bytes in it. This, in turn would cause
initWithCString:encoding: to return nil when using the ASCII encoding. I
would allocate the buffer like this:
pBuffer = (unsigned char*) calloc(pcLength + 1, sizeof(unsigned char));
which zeros the whole buffer. Thus copying any amount of non nul ASCII
chars = pcLength will automatically result in a C string.
That's a very good point. I'll try that.
I think this is most likely where your issue lies, particularly as it has
already been pointed out that initWithCString:encoding: gives undefined results
if the C string is not ASCII encoded.
Best,
Hank
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Re: Problem with allocating memory
On 28 Oct 2009, at 09:27, Michael Abendroth wrote: Basically, I got a source list to witch the user can add entries via a button. The user can also edit the entries title by double clicking on it. The problem is that when you add 3 entries for example, and then edit them, all the items you renamed before will change their names - even though they obviously shouldn't. So already while typing in the new name, all other items will change their names, eventually all are exactly the same. Why is this happening? That's easy. It's because you have a bug in your code. If you think that answer is unhelpful, it's the best you'll get without showing us the code. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Alternative to stringWithContentsOfURL
On 27 Oct 2009, at 15:11, James Lin wrote: Hi all, I am still having the mysterious error of Internal Error 500 message returned from stringWithContentsOfURL. I am using stringWithContentsOfURL to call a php script that add an entry to MySQL database. My ISP claims that they have removed all security restrictions on my php script. Aside from continue to press my ISP's tech support, I have to look for alternatives... Is there an alternative to stringWithContentsOfURL in Cocoa that I can try? According to the Mac OS X docs, stringWithContentsOfURL: is deprecated. http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/DeprecationAppendix/AppendixADeprecatedAPI.html#jumpTo_2 Not that the alternatives that the docs suggest will help you much because the server appears to be returning HTTP 500 error which means something is going wrong in your PHP script. I would speculate that Cocoa sends a GET request to the server, so the first thing I would try is to send a get request using telnet e.g. if your URL is http://example.com/path/to/script.php? aparm=aanotherparm=y, you need to open a terminal and run telnet: telnet example.com 80 GET /path/to/script.php?aparm=aanotherparm=y HTTP/1.1 Host: example.com (press the CR key twice after the Host: line). You'll either get a 200 response and your expected content or a 500 response. If you get 200, then the Cocoa method must be adding some other stuff to the HTTP request and you'll need to try tcpdump to sniff the TCP traffic. The following seems to give useful info: sudo tcpdump -i en1 -A port 80 (en1 is the bsd device for my wireless lan, use ifconfig to get the device for your network, it's probably en0 or en1) If you get a 500 response, either your URL has invalid characters in it (which your browser is dealing with, hence why it works from a browser) or your PHP script can't deal with a bare URL with no cookies. Thank you in advance... James ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: is GC not available on 10.5.8?
The load command is a 10.6 only mach-o load command (LC_DYLD_INFO_ONLY). Something in your application is compiled and linked for 10.6. On 23 Oct 2009, at 16:40, Nick Rogers wrote: Hi, Thanks for the reply. The app actually works as a launcher of another app with root privileges (its only job is this). Hence its a standard cocoa project with the following frameworks: CoreFoundation, Cocoa, AppKit, CoreData, Foundation and Security frameworks. Thanks, Nick On 23-Oct-2009, at 8:48 PM, Bill Bumgarner wrote: On Oct 23, 2009, at 5:04 AM, Nick Rogers wrote: I compiled using Xcode3.2 on 10.6.1, 10.5 base sdk and for Intel 64-bit only with GC only option. The program compiles fine, but the following error is there when launching it on 10.5.8 system: (window doesn't appear) EXC_BREAKPOINT (SIGABRT)// is actually (SIGTRAP) ** Dyld error message: unknown required load command: 0x8022 GC is fully supported on 10.5.8. Something else is broken. Are you linking against any non-Apple libraries? Have they been built correctly? Also, what is the list of libraries / frameworks you are linking against? b.bum ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: how to make cocoa application run as a command line tool?
On 20 Oct 2009, at 11:42, Paul M wrote:
On 20/10/2009, at 10:58 PM, XiaoGang Li wrote:
Greetings,
I have created an document-based cocoa application, now I
need to
provide a command line interface for my users.
for example, users input this into the terminal:
./myApplication.app/Contents/MacOS/myApplication -c --srcFolder A/
B/C
--dstFolder A/B/D;
I can get the argument information through [[NSProcessInfo
processInfo]
arguments] in the init method of the application
delegate, and parse the arguments, then step by step.
My question is that, I don't want the window and other document be
displayed
on the screen, even the menu.
I want all the action be processed without user's interventio.
Maybe, this feature seems odd. anyway, however, user can open my
application
in the Finder, and open a document to edit it. but they
also can run it like a shell command utility to do some other
faceless work,
like convert the type the document to another type.
I don't know whether I have a detailed description for my issue,
but I will
be very appreciated for your feedback.
Your app has to detect whether it's been started from the finder or
whether
it's being called from the command line. I'm not sure off the top of
my head
how best to do this, but it shouldn't be too hard to figure out a way.
Then it'll either show or not show your UI, as appropriate. Simple.
When I need to do this, I create a switch which puts the app into
command line mode.
static int commandLine(int argc, const char* argv[]);
int main(int argc, char *argv[])
{
if (argc 1)
{
if (strcmp(argv[1], -commandLine) == 0)
{
return commandLine(argc, argv);
}
}
else
{
return NSApplicationMain(argc, (const char **) argv);
}
}
This way I can run the binary directly from the command line supplying
the argument:
/Applications/MyApp.app/Contents/MacOS/MyApp -commandLine other args
Or
open /Applications/MyApp.app --args -commandLine other args
NB I haven't actually tried the open method to see if it works.
There's multiple ways to structure this though. You could have 2
separate
apps, but built with as much common code as possible; you could have
a single
app which shows or doesnt show the UI - as described above; you
could even have
a 3rd app which does the heavy lifting, but is called by either a
command line
tool or by a regular cocoa based app.
Without knowing what exactly you're trying to do, it's hard to
comment on the
best aproach.
By the way, an alternative aproach to calling into your application
bundle
from the command line is to simply type 'open -a myApplication',
however I
dont think this will allow you to pass args as you've described above.
paulm
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Re: how to make cocoa application run as a command line tool?
On 20 Oct 2009, at 12:20, Jeremy Pereira wrote:
When I need to do this, I create a switch which puts the app into
command line mode.
static int commandLine(int argc, const char* argv[]);
int main(int argc, char *argv[])
{
if (argc 1)
{
if (strcmp(argv[1], -commandLine) == 0)
{
return commandLine(argc, argv);
}
}
else
{
return NSApplicationMain(argc, (const char **) argv);
}
}
Got that wrong. I think
if (argc 1 strcmp(argv[1], -commandLine) == 0)
{
return commandLine(argc, argv);
}
else
{
return NSApplicationMain(argc, (const char **) argv);
}
might be better.
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Re: self release
On 6 Oct 2009, at 05:00, Dragos Ionel wrote: I have the following scenario: A UIViewController, called BookViewController represents a book. Another UIViewController, ChapterViewController, represents a chapter in the book. BookViewController initializes and displays one ChapterViewController, that represents the current chapter that is read. The user moves through the pages of the chapter, back and forth. This functionality belongs to ChapterViewController. When the last page of the chapter is reached and the user tries to get to the next page, the code inside the ChapterViewController has somehow to tell the parent controller, BookViewController that it needs to be released and another chapter to be initialized. The short answer is to maintain a weak reference (i.e. non retained) to the BookViewController in the ChapterViewController and send a message to it when the chapter is finished. However, you might consider separating the model and the controllers a bit more explicitly. I would have a Book object which contains an ordered collection of Chapter objects as the model. The ChapterViewController would have a reference to the book object and the chapter object it is currently displaying. When the reader gets to the end of a chapter, the ChapterViewController would request the next chapter from the Book object and redisplay its view with the new chapter. How can this be achieved? Your help is appreciated. Dragos ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Xcode3.2 build and analyze warning for NSString allocation
On 27 Sep 2009, at 10:03, Nick Rogers wrote:
Hi,
When I alloc and init a NSString the following way, there is warning
that:
Potential leak of an object allocated on line 526 and stored in
sizeDisp.
1. Method returns an Objective-C object with a +1 retain count
(owning reference).
2. Object returned to caller as an owning reference (single retain
count transferred to caller).
3. Object allocated on line 526 and stored into 'sizeDisp' is
returned from a method whose name
('tableView:objectValueForTableColumn:row:') does not contain 'copy'
or otherwise starts with 'new' or 'alloc'. This violates the naming
convention rules given in the Memory Management Guide for Cocoa
(object leaked).
Can I hope for a small analysis of the above from anybody?
It's hard to see how item 3 above can be improved on as an analysis
except by providing a link to the memory management guidelines. So
here they are.
http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/MemoryMgmt/Articles/mmRules.html#//apple_ref/doc/uid/2994
Thanks,
Nick
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Re: Why am I always getting the linker error: 'duplicate symbol'...?
On 21 Sep 2009, at 21:19, Frederick C. Lee wrote: I'm trying to replace #define directives with c datatype directives.Example: (1) #define x 123 versus... (2) const unsigned x = 123; I place this at the top of the .h (or .m) file, outside of any class or method as stand alone. However, every time I try to use the (2) declaration (within a .h file) the linker gives the error: 'duplicate symbol _x in ' I tried placing the (2) declaration at the top of a .m or .c file, but I get the same linker error. I've declared global constants in another application without a problem. I've checked the compiler type within the build: gcc 4.2 What am I doing wrong? You should define the constant in ONE .m file e.g. foo.m const unsigned int x = 123; and declare it extern in a header file e.g. foo.h --- extern const unsigned int x; --- This is basic C usage but it often confuses people. Back in the 90's I came across a bug where somebody had done exactly the opposite (with a variable, not a constant) i.e. put the extern declaration in every C file and the definition in a header file and the linker was too primitive to complain about the duplicate symbols (or it only emitted a warning that was being ignored). When the code was running, different C functions chose different seemingly random versions of the variable to read/write. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Controlling Spaces and retrieving information about the current Space?
On 22 Sep 2009, at 17:19, Eric Schlegel wrote: Secondly, is there any way in any of those environments to programmatically switch Spaces? For example, if Space 3 happens to be visible, is there any Cocoa code I can run which will switch the visibility to, say, Space 2? No, there is no API (in Cocoa or otherwise) to control the active space. Speaking as a user of Mac OS X, I am relieved about this. Spaces is a feature that is designed to allow the user to manage the way his/her apps appear. Applications which interfere with the user's preferences (e.g. by changing the space from the one I want to view) are likely to be annoying and uninstalled (at least on my Mac). -eric ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: XCode Developer issue. Debugger errors since upgrading to Snow Leopard: unable to read unknown load command 0x80000022
Sorry about coming to this late - I've been away. As I don't see any other responses to this in the list, I am replying. Apologies if it's already been covered. On 14 Sep 2009, at 17:43, maxwellma...@gmail.com wrote: Hi Folks, running XCode in debug mode shows this error countless times in the debug console: unable to read unknown load command 0x8022 I've started seeing this since upgrading to SL. Anyone else spotted it? Cheers, Max You need to upgrade Xcode to 3.2, 0x8022 is the Mach-o load command to load a compressed library. I think this is a new feature in Snow Leopard. In any case, the Xcode 3.1.x debugger doesn't understand it but the 3.2 debugger does. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: int to bytes(value in NSString)
On 18 Aug 2009, at 03:06, Graham Cox wrote: On 17/08/2009, at 5:07 PM, bosco fdo wrote: I need NSString in binary format how do i print NSString in binary format instead of 0001 obj-c code is uint8 barr[4]; barr[0] =(uint8)num; barr[1] =(uint8)num8; barr[2] =(uint8)num16; barr[3] =(uint8)num24; i am using [NSString stringwithFormat:@%i,barr[i]] which %? i need to use to get the byte value(binary data) as it is from the array? This tells you: http://www.opengroup.org/onlinepubs/009695399/functions/printf.html It states that the default precision for %i is 1, but Apple appear to have changed it to 4 (???) So try %i.1 The Apple version of %i conforms to spec. The default precision is 1 but the precision tells you the *minimum* number of digits that will be printed, not the actual number. In any case, if the intention really is to insert the actual raw bytes into the string, the correct format specifier is %c. However, that is likely to mess things up badly if the value of a byte is 0. --Graham ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: [iPhone] networking
On 6 Aug 2009, at 09:27, James Lin wrote: Is this my best option given what I want to accomplish? Thanks in advance... Stepping back a little bit. Are you trying to build some sort of real time messaging service? Or does it matter if the second phone doesn't receive the message straight away? Have you considered sending an SMS message from one phone to the other? Actually scratch that, there's no official iPhone SMS API according to Google. Or what about setting up a mail server? iPhone 1 sends the message using SMTP and iPhone 2 retrieves it using IMAP. James ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: which temp dir to use?
On 25 May 2009, at 20:23, Michael Ash wrote: On Sun, May 24, 2009 at 7:57 PM, Greg Guerin glgue...@amug.org wrote: Michael Ash wrote: Malevolent process C fails. Or maybe malevolent process C works because it's running with the same uid as unprivileged process A. The sticky-bit on a directory only prevents one uid from interfering with another uid's files. It has no effect if the uids of the processes are the same. To put it bluntly: so what? Have you forgotten about B - a process running with escalated privileges that A and C are trying to talk to? The UNIX security model fundamentally works at the user level, not the process level. There is essentially nothing in place to protect one process from attack by another. If the adversary is able to run code under your user, then you have already lost. He must be stopped before he gets that far. Trying to protect your application from attack by another application running under the same user is pointless. Yes, you have lost, but not necessarily the owner of the computer and not all the other people that use it. If the attacker has gained root access, however, it's game over for everybody. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: #import errors and @class warnings
On 30 Apr 2009, at 17:16, Dave DeLong wrote:
Hi Andre,
#import means that the compiler will only include the file once,
thus eliminating re-declaration errors. It does not, however,
eliminate the problems introduced by circular dependencies (which is
what you've got going here).
As a general rule, the only thing you should be #importing in a .h
file are header files from classes that are not from your
application or framework. (Except protocols, which I don't know of
a way to forward declare)
@protocol MyProtocol ;
Matt Gallagher discussed this recently on his excellent Cocoa With
Love blog: http://cocoawithlove.com/2009/04/8-confusing-objective-c-warnings-and.html
Cheers,
Dave
On Apr 30, 2009, at 12:55 AM, Andre Doucette wrote:
Hi everyone!
I have noticed a problem in a few projects and don't understand
why. I have found a work around, but it seems both unnecessary and
a pain due to warnings.
For one example, I have two classes, AppController and
NetworkController.
For the AppController class:
-
#import Foundation/Foundation.h
#import NetworkController.h
@interface AppController : NSObject {
NetworkController *networkController;
}
@implementation AppController
- (void)awakeFromNib {
networkController = [[NetworkController alloc]
initWithAppController:self];
}
@end
And for the NetworkController class:
-
#import Foundation/Foundation.h
#import AppController.h
@interface NetworkController : NSObject {
AppController *appController;
}
- (id)initWithAppController:(AppController *)inAppController;
@end
@implementation NetworkController
- (id)initWithAppController:(AppController *)inAppController {
self = [super init];
appController = inAppController;
return self;
}
@end
I want the two controllers to know about each other. The
AppController object is created in the NIB file, and in it's
awakeFromNib method, I create the NetworkController object, passing
in a reference to itself.
When trying to compile this, I get a series of errors. In my
AppController.m file, I get error: syntax error before
AppController and warning: '@end' must appear in an
@implementation context. In my NetworkController.m, I get error:
syntax error before 'NetworkController'.
It seems that it doesn't like the double #import, but I thought the
whole idea behind #import was that it ensured one-time includes. If
I take either #import NetworkController.h or #import
AppController.h and change them to forward declarations (that is,
@class NetworkController; or @class AppController;), this works,
but then I get a sprinkling of errors everywhere saying that
methods may not be implemented.
Any thoughts?
Thanks!
Andre
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Re: clarification regarding properties
On 27 Mar 2009, at 18:31, WT wrote: First, thanks to all who responded to my question. On Mar 27, 2009, at 6:34 PM, Quincey Morris wrote: The 'foo' in 'self.foo' is a property. The 'foo' in 'just foo' is *not* a property, but an instance variable. It's really important to know that the two are entirely different things, even when they are named the same. Whether the property foo even uses an instance variable foo is an implementation detail of your class. A property *may* be implemented using an instance variable for its storage requirements, and the instance variable *may* have the same name as the property, but neither of those things are requirements. I have trouble understanding the above. How can a property be implemented, if not by using an instance variable? If you're a Java programmer, it might help to think of the objective C property like this: bar = self.foo; // is equivalent to bar = this.getFoo(); self.foo = bar; // is equivalent to this.setFoo(bar); Incidentally, the syntactic equivalent of Java's 'this.foo' is probably Objective-C's 'self-foo', Yes. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Type Declaration With Protocol
On 14 Mar 2009, at 04:27, Roland King wrote: As NSObject is also a protocol you could probably also do id NSObject, Protocol to say the object supports NSObject and Protocol methods but I never do, partly because it doesn't seem as clear, partly because I know that I'm always going to pass something which is actually descended from NSObject, not just supporting that protocol and partly because the NSObject protocol doesn't have some of the NSObject methods I often end up using. Or you can define your protocol as extending the NSObject protocol. e.g. @protocol Foo NSObject // Methods @end On Mar 14, 2009, at 12:13 PM, Richard Somers wrote: The Objective-C 2.0 Programming Language documentation indicates that a type declaration for an object including a formal protocol should look something like this. id Protocol anObject; I have been studying some sample code that does it like this. NSObject Protocol *anObject; What is the difference between the two? Richard ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/rols%40rols.org This email sent to r...@rols.org ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Type Declaration With Protocol
On 16 Mar 2009, at 12:10, Jean-Daniel Dupas wrote:
No, you can't, else the compiler will complains if you do not
override all NSObject protocol methods in classes that conform to
the Foo protocol.
No it shouldn't. The compiler should only complain if your class
does not implement those methods, which of course it does as it
inherits from NSObject.
I don't know if it should or not, but it does.
No it doesn't. For instance:
@protocol FooProt NSObject
-(void) foo ;
@end
@interface Foo : NSObject FooProt
{
}
@end
@implementation Foo
@end
idFooProt aFunction ()
{
idFooProt obj = [[Foo alloc] init] ;
[obj autorelease] ;
return obj ;
}
The compiler complains about the missing implementation of foo but not
any of the NSObject protocol methods.
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: incomplete
implementation of class 'Foo'
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: method definition
for '-foo' not found
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: class 'Foo' does
not fully implement the 'FooProt' protocol
But change the protocol definition as follows:
@protocol FooProt
-(void) foo ;
@end
And these are the warnings:
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: incomplete
implementation of class 'Foo'
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: method definition
for '-foo' not found
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: class 'Foo' does
not fully implement the 'FooProt' protocol
/Users/jeremyp/dev/Perform/Protocol.m: In function 'aFunction':
/Users/jeremyp/dev/Perform/Protocol.m:31: warning: '-autorelease' not
found in protocol(s)
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Re: case-insensitive NSDictionary
When I had to solve the exact same problem, I created a new class that wrapped the NSString as an ivar and defined my own hash and isEqual methods (which both used the corresponding methods on a lower case version of the string) and implemented NSCopying (easy because my class was immutable) and used it for the keys. It was about 20 lines of code. One slight gotcha you might need to be aware of is that headers need not be unique if the value is a comma separated list i.e. the list might be split over several headers with the same key. From section 4.2 of RFC 2616: Multiple message-header fields with the same field-name MAY be present in a message if and only if the entire field-value for that header field is defined as a comma-separated list. [i.e., #(values)]. It MUST be possible to combine the multiple header fields into one field-name: field-value pair, without changing the semantics of the message, by appending each subsequent field-value to the first, each separated by a comma. So either you write code to append the value strings from the header to the values in your dictionary or your values in the dictionary must be NSMutableArrays of strings. On 16 Mar 2009, at 14:02, Roland King wrote: Any good ideas for doing a key-case-insensitive NSDictionary of NSString to NSString? I have some HTTP headers I want to stick in a dictionary and look up later. HTTP headers have case-insensitive keys. I could upper, or lowercase the key before putting it in the NSMutableDictionary, but that means I lose the original case of the key (I probably shouldn't care but I hate throwing away information), and any user of my class has to know to upper or lowercase the key before looking it up, or else I don't expose the dictionary at all and just give lookup methods which hide the details. That's a shame, I wanted the user to have access too all the keys if they wanted it and wanted to just make the NSDictionary available as a property. I could make a case-insensitive string, but subclassing NSString wasn't in my plans for Monday evening, or Tuesday and the user still has to make the same NSCaseInsensitiveString() object to look up the key. I could make a case-insensitive version of NSMutableDictionary which ... oh that's worse, forget I even said that. I think I'm going to lower-case on insert and tell the user the NSDictionary of headers has lower-case keys but .. is there something obvious I missed? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Moving oneself to /Applications (or ~/Applications)
If you really want to test whether an application is running from the
distribution dmg, I would have thought the easiest way is to put a
hidden file on the dmg in the same directory as the application bundle
and merely test for the existence of that hidden file at start up.
On 24 Feb 2009, at 02:34, Shawn Erickson wrote:
On Mon, Feb 23, 2009 at 6:22 PM, Tommy Nordgren
tommy.nordg...@comhem.se wrote:
The following code will test if you are running from the DMG:
NSString * volName = @Mother;
NSString * appName = @MyApp.app;
if ([[[NSBundle mainBundle] bundlePath] isEqualTo: [ NSString
stringWithFormat:@/Volumes/%@/%@,volName,appName]) {
//Here you can show an alert telling the user to to copy the
app to
the applications folder
}
If a disk image it mounted a second time (can happen in a few ways) it
won't be at /Volumes/Mother/... but at /Volumes/Mounter 1/... Also you
can mount disk images in location other then under /Volumes/...
If you really want to check this you should utilize
DiskImages.framework (IIRC) or possibly use hdutil info -plist and
look for your disk image and its current mount location. Then compare
that to your bundles location.
-Shawn
For example...
MacPro:~ shawnce$ hdiutil info -plist
?xml version=1.0 encoding=UTF-8?
!DOCTYPE plist PUBLIC -//Apple//DTD PLIST 1.0//EN
http://www.apple.com/DTDs/PropertyList-1.0.dtd;
plist version=1.0
dict
keyframework/key
string195.2.2/string
keyimages/key
array
dict
keyautodiskmount/key
true/
keyblockcount/key
integer1138724/integer
keyblocksize/key
integer512/integer
keyhdid-pid/key
integer7098/integer
keyicon-path/key
string/System/Library/PrivateFrameworks/DiskImages.framework/
Resources/CDiskImage.icns/string
keyimage-alias/key
data
AAFuAAIAAARNYWluAADD
STB4SCsDpvcQaVdvcmswOVRyaWFsLmRtZwAA
AMSJ
7MWHd2YAAP8AAAkgCURv
d25sb2FkcwAAEAAIAADDSZLoEQAIAADFh+fmAQAMAAOm
9wADClAAAHmMAAIALU1haW46VXNlcnM6c2hhd25jZTpEb3dubG9h
ZHM6aVdvcmswOVRyaWFsLmRtZwAADgAiABAAaQBXAG8AcgBrADAA
OQBUAHIAaQBhAGwALgBkAG0AZwAPAAoABABNAGEAaQBuABIAKFVz
ZXJzL3NoYXduY2UvRG93bmxvYWRzL2lXb3JrMDlUcmlhbC5kbWcA
EwABLwAAFQACAA7//wAA
/data
keyimage-encrypted/key
false/
keyimage-path/key
string/Users/shawnce/Downloads/iWork09Trial.dmg/string
keyimage-type/key
stringUDIF read-only compressed (zlib)/string
keyowner-uid/key
integer501/integer
keyremovable/key
true/
keysystem-entities/key
array
dict
keycontent-hint/key
stringApple_partition_scheme/string
keydev-entry/key
string/dev/disk7/string
/dict
dict
keycontent-hint/key
stringApple_partition_map/string
keydev-entry/key
string/dev/disk7s1/string
/dict
dict
keycontent-hint/key
stringApple_Driver_ATAPI/string
keydev-entry/key
string/dev/disk7s2/string
/dict
dict
keycontent-hint/key
stringApple_HFS/string
keydev-entry/key
string/dev/disk7s3/string
keymount-point/key
string/Volumes/iWork '09 Trial Install
DVD/string
/dict
/array
keywriteable/key
false/
/dict
/array
Re: Simple memory problem
On 6 Feb 2009, at 06:32, Martin Wierschin wrote: On Feb 5, 2009, at 4:42 PM, Steve Sisak wrote: NSString * newString = [inputString stringByReplacingCharactersInRange:range withString:@]; [inputString release]; // release old inputString inputString = [newString retain]; // retain new inputString This sequence is not safe. As an optimization there is nothing preventing inputString from returning self if range is of zero length. If that ever happened, you could end up deallocating the string before the following retain occurs. So retain newString before releasing inputString - or explicitly test for pointer equality and only do the release and retain if they are not equal. NSString * newString = [[inputString stringByReplacingCharactersInRange:range withString:@] retain]; [inputString release]; // release old inputString inputString = newString ; As has been suggested, using a single mutable string is probably the best way to go. Agreed ~Martin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSTask Leaking...
On 29 Jan 2009, at 19:33, Mr. Gecko wrote: I'm just going to use sscrypto framework for it... If a malicious person can replace an executable with his own, he can probably also replace a framework... Regardless of any other problems, you've introduced a serious weakness - a hacker just needs to temporarily change /sbin/md5 to a shell script that cats the expected output. For that matter, they could easily edit the binary to change the string /sbin/md5 to another path that does the deed (to avoid having to mess with sbin each time) If you are trying to write secure code, don't execute external binaries that you have no control over and expect it to be secure. Glenn Andreas gandr...@gandreas.com http://www.gandreas.com/ wicked fun! JSXObjC | the easy way to unite JavaScript and Objective C ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Is there a more efficient way to get the first 4 bytes off a NSInputStream to compare
On 27 Jan 2009, at 23:07, Graham Cox wrote:
On 28 Jan 2009, at 2:24 am, Jeremy Pereira wrote:
Yes. That is correct, but since buffer is already a pointer to the
first byte of the array and then you are taking a reference to it,
key will end up containing the address of the buffer. You really
need:
uint key = *(uint*)buffer;
That's incorrect. Or rather, in this case it doesn't make any
difference, but the use of '' is more general as it works whether
buffer is an array or not.
When you declare:
uint8 buffer[8];
You've reserved 8 bytes on the stack. Whether you use 'buffer' or
'buffer' you obtain the same address, as C treats array variables
as pointers. But:
Having tried it just now, I stand corrected.
However, I would argue that this is the C compiler behaving in a
deliberately inconsistent way, since in C, arrays and pointers are
supposed to be the same thing. As buffer is actually a constant,
taking its address should really result in a compiler error in the
same way as int a = 123;
uint8 buffer;
You get very different results from 'buffer' and 'buffer' so in the
interests of defensive programming, using '' is allowing your code
to tolerate a change to the buffer declaration without breaking.
Because of the additional cast *(int*) such a change would go
unnoticed by the compiler but probably have a very bad outcome at
runtime. It's a good habit IMO to always take the address in these
cases to make it clear in your code what your intentions were when
you wrote it.
I disagree. Consider the following program:
---
#include stdio.h
int buf[2];
static void foo(int buf1[])
{
printf (buf1 %08x %08x\n, buf1, buf1);
}
int main ()
{
unsigned int key = *(unsigned int*)buf;
printf (buf %08x %08x\n, buf, buf);
foo(buf);
return 0 ;
}
---
If I compile and run it, I get the following output:
buf 2030 2030
buf1 2030 ba00
Clearly if I naively copy and paste
unsigned int key = *(unsigned int*)buf;
from main to foo and just change the name, I will get the wrong result.
--Graham
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Re: Is there a more efficient way to get the first 4 bytes off a NSInputStream to compare
On 27 Jan 2009, at 14:23, Adam Venturella wrote: Leopard is little endian ( at least on the intel chips, but I have read there are other macs that are big-endian, so I am trying to catch and handle that accordingly) The endianness is dependent on the processor architecture, not the operating system. Intel Macs are little endian, but PowerPC Macs are big endian no matter which OS is running on them. With regard to how the casting is actually working, I just want to make sure I understand the logic: uint key = *(uint*)buffer; from right to left this is what is happening: Get a pointer/reference to 'buffer'. Cast that pointer into a uint pointer. Then, dereference the pointer to get it's value. Is that correct? Yes. That is correct, but since buffer is already a pointer to the first byte of the array and then you are taking a reference to it, key will end up containing the address of the buffer. You really need: uint key = *(uint*)buffer; ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Accessing private members of another object of the same class
On 26 Jan 2009, at 14:02, Horst Jäger wrote:
First of all: thank you. You solved my problem.
There's no real way to enforce privateness, either in Objective-C
or C++.
Why not in C++?
#define private public
class Foo
{
private:
int privateVar;
} ;
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Re: SIGPIPE with sockets
On 19 Jan 2009, at 10:51, malcom wrote: Hello guys, I'm using blackhole netsocket class in an app of mine. Today I've received a report regarding this error broken pipe abnormal exit. I've taken a look a mailing list and it seems to be an error related to sockets (cannot write, closed before write). Anyone can tell me how to solve it? What mean cannot write? (or...why it cannot write?).This is the only report since the beginning (over a year ago); could it depend from some system settings? A dev tell me that it just means the other side closed the connection uncleanly (and it crashed). Is this a problem related to server? can I fix it? I don't know about uncleanly, but yes, the reading end of the connection was closed and your program tried to write to it. Your socket library is probably using either the write or the send system calls at the bottom level. According to the man page for write(2) (type man 2 write on a command line) says that the write call should return the EPIPE error. The man page for send(2) says the same, but also that SIGPIPE is generated (which will terminate the app). If SIGPIPE is generated, you will need to install a signal handler to stop the app from crashing, or perhaps just ignore it. In this situation, the write/send system call may return EINTR instead of EPIPE. Thanks a lot malcom ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Enum advice please
On 6 Jan 2009, at 19:59, Quincey Morris wrote: I'm sure someone will jump in and correct me if I'm wrong about this, Jumping in but (in answer to the implied why? in Graham's post) my recollection is that: -- 'typedef' was added to C later in its life, so originally 'enum XXX' was the only way to refer to an enum type you'd already defined. [Later in this context would be somewhere in the mid-1970s.] Or perhaps it was just that some C compilers didn't implement 'typedef' in olden days. enum was added to C after typedef. When I first started learning C in the mid 80's (from K R first edition), typedef already existed as a keyword but enum didn't. In fact, I don't think enum became an official part of C until the first ANSI standard was published. However, your whole discussion still makes sense with the word struct substituted for enum and I'm sure struct predates typedef. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Stumped on memory problem :(
On 2 Jan 2009, at 01:14, Jacob Rhoden wrote:
I have read the memory management documentation over and over but
still cannot work out the problem with this code, can anyone see it?
I have spent hours on this!
+(NSMutableArray*)getStrings {
NSMutableDictionary* dict = [[NSMutableDictionary alloc] init];
[dict setValue: @ forKey: [NSString stringWithString:@one]];
[dict setValue: @ forKey: [NSString stringWithString:@two]];
NSMutableArray *array = [[NSMutableArray array] init];
This line should read: NSMutableArray *array = [[NSMutableArray
alloc] init];
This *may* be the cause of the problem.
NSEnumerator* keyEnum = [dict keyEnumerator];
NSString* key;
while ((key = [keyEnum nextObject])) {
[array addObject: key];
}
[dict release];
return [array autorelease];
}
// Here is where I call the above function
NSMutableArray* a =[StringHelper getStrings];
[a retain];
for(int i=0;ia.count;i++) {
NSLog(@ %@,(NSString*)[a objectAtIndex: i]);
You don't need to cast the object to NSString*. %@ works with any
subclass of NSObject.
}
[a release];
AFTER the code is complete I see the following message, the address
location is always the pointer to the array created in the
getStrings method.
2009-01-02 12:07:29.277 Test[5184:813] *** -[CFArray release]:
message sent to deallocated instance 0x132950
Any help muchly appreciated. I have tried with and without the [a
retain] and [a release].
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Re: Enum advice please (resend not sure if it was delivered ?)
I pasted your code into a simple C program and it compiled no
problem. Is it possible that the error is in the previous declaration
to the typedef? Bear in mind it might be a problem in a header file.
On 5 Jan 2009, at 10:49, Damien Cooke wrote:
Hi all,
I have the following code:
typedef enum _DCDBTypes
{
DCOItemType = 0,
DCOCategoryType = 1,
DCORegionType = 2
}DCDBTypes;
It gives me this error message.
error: expected specifier-qualifier-list before 'typedef'
If I try to use it like this
- (void)setItemType:(DCDBTypes) newType;
I get this error message
error: expected ')' before 'DCDBTypes'
I have stared at this piece of code for so long, I know it is
something stupid I have assumed or done, please glance over it and
point me in the right direction if possible.
Regards
Damien
We act as though comfort and luxury were the chief requirements of
life, when all that we need to make us happy is something to be
enthusiastic about.
-- Albert Einstein
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Re: More - Safari Download Security Alerts
On 17 Dec 2008, at 15:27, Dave wrote: On 17 Dec 2008, at 12:03, Jeremy Pereira wrote: On 17 Dec 2008, at 11:28, Dave wrote: Hi Mark, Thanks a lot, it certainly is a lot easier to use and a lot less flakey, but it still doesn't work. It does not create a folder in /Applications it just installs the raw files there instead. I'm giving up on PackageMaker, it just doesn't work and there doesn't seem to be any support for it. Seems crazy that you can't do this one simple thing with it, in every other installer I've ever used this would have been a 5 min job, 2 days later using PackageMaker and still nothing. Oh well, such is life. It would be crazy if it were true, but it's not. I've just created a simple package maker project that installs to a sub directory of /Applications and it works absolutely fine. Here's how I did it. I created a directory in my home folder that mirrored the way I want the final installation to look i.e. /Users/jeremyp/ - /Applications - /ASubDir I put the distribution application in ASubDir, so I have this directory structure: /Users/jeremyp/ - Applications/ - ASubDir/ - MyApp.app In package maker, I added /Users/jeremyp/Applications as content. On the right hand pane Install was /Users/jeremyp/Applications Destination was /Applications (I had to change this from /) After running the installer with the built package, I had a subdirectory within /Applications called ASubDir containing my application exactly as expected. Please see my last post. Did you set the Destination on the Contained and the Folder within it? I'm not quite sure what you mean. It seems to me that what actually happens is that PM takes everything *in* the folder you specify in the Install field and copies it *into* the location in the destination field. I think the reason it's like this and the destination field defaults to / is that a common use-case of PM is you want to install lots of components in different places e.g. an application in /Applications and a driver in /System/Library/Extensions. It doesn't seem to work unless you do this. To me this seems odd, if left empty surely better behavior would be to use the Containing Item's Destination rather than / ? If you wanted it to go into /, you could just override by entering / in the folder Destination. Also did you try it with files other than just the .app file? e.g. the .app file and (say) a .txt file. Yes. In fact, I just tried it with an empty directory in my package and the empty directory was created successfully. I had this structure: $HOME/testpm/Applications/ subdir/ hosts (copied frome /etc/hosts) emptydir/ I added $HOME/Applications as the content. The install field was $HOME/Applications, the destination was /Applications The subdir structure was created faithfully in /Applications including the emptydir. Incidentally, this method preserved the folder icon I set for the subdir directory. All the Best Dave ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: More - Safari Download Security Alerts
On 17 Dec 2008, at 11:28, Dave wrote: Hi Mark, Thanks a lot, it certainly is a lot easier to use and a lot less flakey, but it still doesn't work. It does not create a folder in / Applications it just installs the raw files there instead. I'm giving up on PackageMaker, it just doesn't work and there doesn't seem to be any support for it. Seems crazy that you can't do this one simple thing with it, in every other installer I've ever used this would have been a 5 min job, 2 days later using PackageMaker and still nothing. Oh well, such is life. It would be crazy if it were true, but it's not. I've just created a simple package maker project that installs to a sub directory of /Applications and it works absolutely fine. Here's how I did it. I created a directory in my home folder that mirrored the way I want the final installation to look i.e. /Users/jeremyp/ - /Applications - /ASubDir I put the distribution application in ASubDir, so I have this directory structure: /Users/jeremyp/ - Applications/ - ASubDir/ - MyApp.app In package maker, I added /Users/jeremyp/Applications as content. On the right hand pane Install was /Users/jeremyp/Applications Destination was /Applications (I had to change this from /) After running the installer with the built package, I had a subdirectory within /Applications called ASubDir containing my application exactly as expected. I will go back to using the AppleScript's and try using the xattr trick. Thanks Again, All the Best Dave On 17 Dec 2008, at 01:18, Mark Allan wrote: On 16 Dec 2008, at 17:55, Dave wrote: All I have done is to create an Installer with PackageMaker, but I can't get it to installer a folder with the files in it. Have you tried using the version of PackageMaker which comes with Xcode 2.5? I'm probably in the minority here, but I find it much easier to work with than the current version. You can download Xcode 2.5 DevTools from the ADC website and then opt to install it in a different directory from the current Dev Tools. You won't be able to make use of 10.5 specific things like flat packages and signed packages etc. but if you're also targeting previous versions of OS X, then that's maybe not an issue anyway. Mark ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to a...@jeremyp.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Safari Download Security Alerts
On 11 Dec 2008, at 10:53, Dave wrote: Hi All, I have an application that is downloaded from the web by Safari. When the user double-clicks on the .dmg file to open the a Warning Dialog is displayed. My question is, is there anyway of stopping the dialog from appearing? My boss doesn't like it and wants me to look into ways of getting rid of it, but I'm not sure where to start! I guess you could start by explaining to your boss that it is a security feature designed to help prevent users from accidentally executing malicious software that they downloaded from the Internet. If there was a way for developers (which necessarily includes developers of malicious software) to circumvent that feature, it would make it about as effective as a chocolate fireguard, but not nearly so tasty. Thanks in Advance, All the Best Dave Dave ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
If I were trying to generate an asynchronous timer event in C I'd probably just run a thread in a tight loop calling poll (man 2 poll for details) each time round with a timeout equal to your timer interval and no other events. And when the poll returns do whatever processing you need on your timer. Will that not work for you? Otherwise your question seems to be How can I use any of the high level Mac OS X timer facilities without using the high level Mac OS X timer facilities? for which there is, of course, no answer. On 4 Dec 2008, at 15:14, Påhl Melin wrote: 2008/12/4 Joseph Kelly [EMAIL PROTECTED]: I've used both the CF and NS timer apis in many different situations without a hitch. They're fairly reliable. Perhaps you could explain your can't use a runloop restriction -- e.g. if you are writing a daemon or a kext, this is not the list you want to post to. I'm not writing a daemon or a kext. I'm porting a framework that I've designed and used on .Net before that will form the foundation of my architecture for my future Mac OS applications (I'm new to Mac OS programming). The framework is used for easy communication and synchronization between threads, processes and computers (with the same syntax) and make it possible to design an application in small modules that communicates via messages and it's straightforward to start with the modules as threads in a single application and then split into several processes on a computer or ever distribute certain modules to other computers without changing much (or any) code at all. But mainly it makes it easier to write efficient multithreaded applications that work. I'm very happy with the messaging framework and would like to use it on Mac OS X as well. Run loops are not compatible with this approach since my threads need to run forever or block in my framework when they are waiting for messages (the timers are used to generate timer messages internally in the framework). The threads are not event driven and will not return to the run loop. You might find if you refactor your design a bit, that it will take to a runloop model quite well. In fact, most of the user space IOKit async routines require that you use a runloop. I don't want to refactor my design. :-) To do that, I would have give up the framework design completely. I'm generally happy with the design just want to make a good port to Mac OS X. Also, the Mach APIs are not strictly private -- the headers are publicly available. They are subject to change between releases, so if you do start using them, you will need to stay on top of things -- check your binaries on pre-release OS seeds etc. Okay, thats great to know. But I suppose it's still begging for trouble, if you can avoid it. Joe K. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Not so long filenames
On 26 Oct 2008, at 09:55, Gerriet M. Denkmann wrote: On 26 Oct 2008, at 00:30, Postmaster wrote: On 14 Oct 2008, at 21:00, Gerriet M. Denkmann wrote: On 14 Oct 2008, at 18:07, Jason Coco wrote: On Oct 14, 2008, at 11:28 , Gerriet M. Denkmann wrote: HFS+ stores files in decomposed UTF-8. Checking the system headers, system headers is kind of vague: which file exactly do you have in mind? it can store files with a maximum file name length of 255 bytes. How do you get 256 bytes of UTF-8 into 255 bytes? Checking the system header hfs_format.h for HFSUniStr255 one sees that it can store file names with a maximum length of 255 u_int16_t. And there is no real problem of putting the 128 shorts of Utf-16 into 255 u_int16_t. It's actually the VFS layer I was thinking of. The OS X VFS uses UTF-8 (otherwise there would be no backward compatibility for calls like open(2) etc). I got the 255 byte limit by looking at struct dirent defined in /usr/include/sys/dirent.h which is the structure used in the readdir syscall. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
