Re: [Libclc-developers] Need help with clc_map.

[<bo...@me...>]

Hallvard B Furuseth wrote:
> Bjørn Augestad writes:
> 
>>I'm trying to implement a map (...)
>>
>>int    clc_map_set(clc_map m, const char* key, void* data);
>>int    clc_map_iset(clc_map m, int key, void* data);
>>(...)
>>void*  clc_map_get(clc_map m, const char* key);
>>(...)
> 
> 
> I think this is pretty backwards. 

Me too. I'm currently thinking about something like:
    clc_anytype clc_int2any(int);
    int         clc_any2int(clc_anytype);

with functions for each datatype, of course.
Then the set/get protos for a map could be
  int         clc_map_set(clc_map m, clc_anytype key, clc_anytype value);
  clc_anytype clc_map_get(clc_map m, clc_anytype key);

and a call: clc_map_set(clc_int2any(123), clc_void2any(foo));

Implemented as a struct containing typeinfo and a union to store stuff. 
I really don't want such  a solution, as it isn't very idiomatic. May be 
nice for private stuff, but IMHO not for libclc.

Do you know of an alterative way?

  Let's pick a good hash table
> implementation first (which implementation is best is seems like a good
> thing to ask about on comp.lang.c), and you can implement maps on top of
> that if you want to.

Fine, but that doesn't solve the interface problem dealing with keys of 
different types. BTW, the protos I posted was just for setting and 
getting values using keys, other protos exist. :-)

[snip]

-- 
boa

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