The SSCrypto object doesn't need to be released; it isn't being
retained, and doesn't leave the scope of the function. It will be
deallocated when control leaves the function.
Alex
On Nov 4, 2008, at 12:09 AM, Roland King wrote:
well no that would leak since then the crypto object wouldn't get
released. Also, I don't have the documentation for SSCrypto but I'd
have thought whatever the digest returns is already autoreleased, so
releasing it again would be wrong.
Question is how are you calling this? Is there an autorelease pool
set up somewhere which is actually getting purged? All autorelease
is doing is sticking it on the autorelease pool, if nothing cleans
up the pool, it'll just hang onto them forever.
What crash are you getting, are you getting out of memory or are you
getting a crash because you're accessing an already freed object or
freeing it twice?
Alex Heinz wrote:
You probably want [[[crypto digest:@"MD5"] hexval] autorelease].
This will add the NSString object to the autorelease pool, instead
of the SSCrypto object, as you are doing now.
HTH,
Alex
On Nov 3, 2008, at 9:05 PM, Mr. Gecko wrote:
Hello I am trying to MD5 a whole bunch of strings and I choose
SSCrypto for it, but for some reason, it crashes because of
memory. I know it has to do with releasing, I haven't found much
details on when to use release and autorelease; so this is a huge
task for me to find out.
Here is my method I have made.
- (NSString *)md5:(NSString *)MD5 {
SSCrypto *crypto = [[SSCrypto alloc] init];
[crypto setClearTextWithString:MD5];
return [[[crypto autorelease] digest:@"MD5"] hexval];
}
if you could point out what I am doing wrong, I would be great full.
Thanks,
Mr. Gecko
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