Le lun 28/06/2004 à 12:15, Kuang-Chun Cheng a écrit :
> Hi,
>
> Why the following code not working ?
> The result will be "KEY aaa NOT FOUND".
>
> The key can't be found if I use buf[], and
> it can be found if I search "aaa" ???
>
> Thanks.
>
>
> ----
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <unistd.h>
> #include <string.h>
> #include <glib.h>
>
> int main (int argc, char *argv[])
> {
> char buf[1024];
> GHashTable *htab;
>
> htab = g_hash_table_new(NULL, NULL);
>
> g_hash_table_insert(htab, "aaa", NULL);
>
> strcpy(buf, "aaa");
> if (g_hash_table_lookup(htab, buf)) {
> printf("KEY %s FOUND\n", buf);
> } else {
> printf("KEY %s NOT FOUND\n", buf);
> }
>
> g_hash_table_destroy(htab);
>
> exit(0);
> }
As you passed NULL pointers to g_hash_table_new, the comparison is made
on the values ob buf and "aaa" which are their addresses in memory.
That's why buf cannot be found.
Use g_hash_table_new (g_str_hash, g_str_equal); instead.
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