Re: Malloc()
Re: Malloc()
- Subject: Re: Malloc()
- From: Development <email@hidden>
- Date: Tue, 2 Apr 2002 14:16:11 +0200
Hi,
char *buffer;
buffer = malloc(bufferSize);
NSLog(@"buffer size is: %i", sizeof(buffer));
here is where the problem is. the log output is 'buffer size is: 4',
even when i change the malloc
statement to read buffer = malloc(129) (129 is the size of the buffer
i need in my test case).
When you ask for C to give you sizeof(buffer) you're actually asking it
to give you the size of the variable called buffer. That variable is a
pointer, and pointers on a Mac are 4 bytes long, so it's giving you the
right answer.
What you're actually trying to find is the size of the data that buffer
points to, so you might think that sizeof(*buffer) would work. Not so!
Shouldn't
int buffersize = GetPtrSize(buffer);
do the job?
At least when creating the pointer with
buffer = NewPtr(129);
or isn't this supported in cocoa?
hth,
Dirk Stegemann
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| References: | |
| | >Re: Malloc() (From: Pete Yandell <email@hidden>) |