Re: objc_method_list structure?
Re: objc_method_list structure?
- Subject: Re: objc_method_list structure?
- From: Dustin Voss <email@hidden>
- Date: Thu, 11 Nov 2004 19:23:07 -0800
On 11 Nov, 2004, at 6:02 PM, Tim Conkling wrote:
struct objc_method_list
{
struct objc_method_list *obsolete;
int method_count;
struct objc_method method_list[1];
};
According to the documentation, the method_list field in the above
structure is supposed to be "An array of objc_method data structures."
I'm not sure what should go in the [0] index and what should go in the
[1] index in order to make this array...
This is a common C technique. How it works is, the array is not
actually 1 element long. It is however long method_count says.
method_list is actually a pointer to a block of contiguous memory that
is treated as an array. The memory block is (method_count *
sizeof(objc_method)) bytes long. You can address the elements like
method_list[0], etc., all the way up to, but not including,
method_count, just like any array.
To create this, make an appropriately-sized memory block, fill it as if
it were an array, and set method_count to the number of elements and
method_list to the address of the block.
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