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 | | From: | bazad | | Subject: | What to believe in ? | | Date: | 20 Nov 2004 03:49:24 -0800 |
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 | GNU objc/hash.h contains the following text:
/*
* This data type is the function that compares two hash keys and returns an
* integer greater than, equal to, or less than 0, according as the first
* parameter is lexicographically greater than, equal to, or less than the
* second.
*/
typedef int (*compare_func_type)(const void *, const void *);
Later on you can find an implementation of this function type.
/* Compare two strings. */
static inline int
compare_strings (const void *k1, const void *k2)
{
if (k1 == k2)
return 1;
else if (k1 == 0 || k2 == 0)
return 0;
else
return !strcmp (k1, k2);
}
Now, I an not an expert in C and Objective-C, but I can say that the
original description is not followed at all!
The actual signauture is something like:
return 1 if data is equal
return 0 if data is not equal
Pointers follow the same rule. It is even more descriptive:
/* Compare two pointers for equality. */
static inline int
compare_ptrs (const void *k1, const void *k2)
{
return !(k1 - k2);
}
I expected better from the core level of the GNU code.
Needless to say I wasted lots and lots of time...
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| | From: | Tilo_Prütz | | Subject: | Re: What to believe in ? | | Date: | Sat, 20 Nov 2004 13:09:17 +0100 |
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| bazad wrote:
>
> I expected better from the core level of the GNU code.
>
> Needless to say I wasted lots and lots of time...
Me, too. You can't rely on the libobjc. Either use a complete framework
like GNUstep or libFoundation or program your own (as I do for fun and for
learning :)).
And if you ever come to the point where you need to know which methods are
supported by a protocol:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18255
greetz
>tilo
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