Re: NSString vs. unicode encoding
Re: NSString vs. unicode encoding
- Subject: Re: NSString vs. unicode encoding
- From: Johan Kool <email@hidden>
- Date: Wed, 16 Sep 2009 11:50:39 -0700
Op 16 sep 2009, om 11:31 heeft Shawn Erickson het volgende geschreven:
On Tue, Sep 15, 2009 at 9:04 PM, Johan Kool <email@hidden>
wrote:
Dear list,
I need to work with strings as in stringA. (I don't have much
choice, but to have it in a NSString at the start.) I want to have
the readable output "hello world".
NSString *stringA = @"hello\040world";
NSString *stringB = [NSString stringWithUTF8String:"hello
\040world"] ;
// This works, so I know NSString can deal with the encoding I have
in stringA
NSLog(stringB);
// This does not work (as expected)
NSLog([NSString stringWithUTF8String:[stringA UTF8String]]);
// Nor does this work
NSLog([NSString stringWithUTF8String:[[stringA
dataUsingEncoding:NSUTF8StringEncoding] bytes]]);
// Or this for that matter
NSLog([NSString stringWithUTF8String:[[stringA
dataUsingEncoding:NSASCIIStringEncoding] bytes]]);
Never pass a string like that to NSLog. NSLog takes the first
parameter as the FORMAT definition for the log statement. It parses
that string looking for %d, etc. and then will attempt pull
additional parameters based on what it parses. So it can cause in
proper memory/stack access which can crash and/or expose information
from you processes memory.
Always ensure the first parameter you pass to NSLog is a proper
format string (this goes for any function that takes a format string).
NSLog(@"%@", ...) in this case.
Thanks, you are right. I knew that, this was just a mistake in the
code I wrote for phrasing the question. It wasn't (nor solved) the
issue I am having unfortunately (see my follow-up post from a few
minutes ago).
Johan
---
http://www.johankool.nl/
KOOLISTOV - Software for Mac and iPhone
http://www.koolistov.net/
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