Re: GHashTable ( Missing something ?) (Found what was missing)

[Harring Figueiredo <harringf yahoo com>]

 The g_hash_table_insert resues the key - I was deleting it.

 The source code says that the key is "reused"..

 from ghash.c

   297       /* do not reset node->key in this place, keeping
    298        * the old key is the intended behaviour.
    299        * g_hash_table_replace() can be used instead.
    300        */
    301
    302       /* free the passed key */
    303       if (hash_table->key_destroy_func)


 The docs says:"

If the key already exists in the GHashTable its current value is replaced with
the new value.

 Perhaps I should file a doc. bug ?

  Thanks,

Harring.

 
--- Harring Figueiredo <harringf yahoo com> wrote:

> 
> Folks, I am doing a lookup on a hastable, and it always returns NULL, even
> though the key exist -- (Now, I know it's is friday, but I have not started
> drinking yet :P) -- Note that the GEqualFunc is never called.
> 
> ---- <code> --------------------
> 
> gboolean my_str_compare(char* k, char* k2){
>     fprintf(stderr,"Comparing k=[%s] with k2=[%s]\n", k, k2);
>     //return g_str_equal((gpointer)k,(gpointer)k2);
>     return strcmp(k,k2) == 0;
> }
> 
> 
> void dump(gpointer pkey, gpointer entry, gpointer _null)
> {
>     CfgEntry* e = (CfgEntry*) entry;
> 
>     fprintf(stderr, "DUMP key(p)=%s, val=%s, d=%s\n", (char*)pkey, e->val,
> e->desc);
> 
>     fprintf(stderr, "DUMP key=%s, val=%s, d=%s\n", e->key, e->val, e->desc);
> }
> 
> 
> CfgEntry* cfg_get_entry(const char* key){
>     g_return_val_if_fail(key != NULL, NULL);
>     fprintf(stderr, "Looking for passed in key: %s\n", key);
>     g_hash_table_foreach(table, dump, NULL);
>     return g_hash_table_lookup(table, key);
> }
> 
> 
> My Hastable is created with:
> 
> 
>  g_hash_table_netable = g_hash_table_new_full(g_str_hash,
> (GEqualFunc)my_str_compare, NULL, (GDestroyNotify)cfg_entry_unref );
> 
> --------------- </code> -----------------------
> 
> 
>  ----------- <output> ---------------
> Looking for passed in key: My_key
> DUMP key(p)=MY_key, val=value for the key, d=#description for this entry
> DUMP key=MY_key, val=value for the key, d=#description for this entry
> Did not find entry for key
> 
> -------------- </output>----------------------
> 
> 
>  NOTE that the my_str_compare is never called.
> 
>  What the heck am I missing here ?
> 
>  Perhaps I need a break from the keyboard.. 
> 
>  Thanks for any help.
> 
> Harring
>  
> 
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