compare function for GValues

[Stefan Kost <kost imn htwk-leipzig de>]

hi hi,

we have lots of methods in our project the looksup list-entries by a gobject
property (the lists node->data entries are gobject instances).
We would like to generalize the code - something like below:

-- pseudo code --

find_by_property(gpointer item,gpointer data) {
 GValue value;
 g_object_get_property(item,data.key,&value);
 //a) compare via
      strcmp(find_by_property(value),find_by_property(data.compare_value));
 //b) switch(g_value_get_type(value)) {
 //     G_TYPE_STRING: strcmp(value,data.compare_value);
 //     default: value==data.compare_value;
 //   }
}       
        
struct {
  gchar *key;
  GValue compare_value;
} data;
g_value_init(data.compare_value, G_TYPE_STRING);
g_value_set_string(data.compare_value,id);
data.key="id";
        
node = g_list_find_custom(self->priv->machines, data, find_by_property);
if(node) return(BT_MACHINE(node->data);

-- pseudo code --

Any ideas how to best handle the missing copare function in the GValue system?

Stefan
-- 
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