Re: Bug in GLib, libglade, libc?? (ok, it´s not GTK specific...)

[Fabricio Rocha <rocha_fabricio yahoo com br>]

Hello, guys!

	Sorry, I know i´m crossing the borders of off-topic. But I had to tell 
you that I could get rid of SEGFAULTs by using a GPtrArray* as member of 
my structure. As said before, this struct member shall hold one or more 
strings. (John, I have tried using a GList as this member, but I could 
not get it working as well. Maybe it was a erroneus attempt, however).

	I just got curious about WHAT is the "magic" in GPtrArray that I could 
not "reproduce" using a gchar** variable. Man, I REALLY tried it, but 
you masters should be able to explain... My last attempt was that: the 
struct variable is called "var", the list of strings is the member 
"values". So, var->values was recognised by GDB as "gchar*[0]", and 
*var->values was recognised as "gchar*". You will probably find it very 
naive and exaggerated, but just realise the desperation:

-------------------------
        gchar *valuearea;
        gchar *tempvalue;
        VarInfo newvar;
                
        tempvalue = g_strdup_printf ("variable%i",++varscount);
        valuearea = (gchar*)g_malloc ((gulong)strlen(tempvalue));
        valuearea = g_strdup (tempvalue);
        newvar.name = valuearea;
        (...)
        valuearea = (gchar*) g_malloc (strlen(tempvalue=g_strdup("0")));
        valuearea = g_strdup(tempvalue);
        *newvar.values = valuearea;
        newvar.parentvar = NULL;
                
        var = g_malloc ((gulong)sizeof(newvar));
        var = memcpy ((VarInfo*)var, (VarInfo*)&newvar, sizeof(newvar));
-----------------------

	I still don´t know what the hell I did wrong. Later in the code, I 
could access and use correctly "var->name", but I would get SEGFAULT in 
a line that a tried to set the text of a GtkEntry to *(var->values). GDB 
would tell me that it couldn´t access address 0x11 (TOO low address 
indeed). What was wrong there, gurus??

	By the way, I´m pretty happy that it´s working fine with GPtrArray. But 
I can´t stop itching my head until I found out what I was doing wrong.... :)

Thank you all, very much!

Fabricio Rocha
Brasilia, Brasil

                
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