On Mon, Apr 03, 2006 at 03:19:25AM -0700, morph_in wrote:
>
> I am a newbie to GTK programming and cannot work out a simple problem ,so
> pls can some one inform abt the problem
>
> GtkTextBuffer *tbuffer;
> GtkTextIter start;
> GtkTextIter end;
> GtkWidget * textv = lookup_widget(GTK_WIDGET(menuitem), "textview1");
> tbuffer =gtk_text_view_get_buffer(textv);
> FILE *infile;
> infile = fopen("/root/Desktop/a.s", "r");
> if (infile)
> {
> char buffer[1024];
> int nchars;
> gchar *utf8;
> while (1)
> {
> nchars = fread(buffer, 1, 1024, infile);
> utf8 = g_locale_to_utf8(buffer, nchars, NULL, NULL, NULL);
This always allocates a new string...
> if (!utf8)
> { return;
> }
> gtk_text_buffer_get_end_iter(tbuffer, &end);
> gtk_text_buffer_insert(tbuffer, &end, utf8, strlen(utf8));
>
> if (nchars < 1024)
> break;
> }
> fclose (infile);
> free(utf8);
...so freeing it only once does not work.
Moreover, if the locale encoding is not single-byte (e.g.,
it is already UTF-8), this does not work because nothing
guarantees characters won't be split by the 1024-byte
boundaries.
Moreover, if the file is not really huge (and in that case
you would have other scalability problems with this code),
it is much better to use g_file_get_contents().
> }
> gtk_text_view_set_buffer(GTK_TEXT_VIEW(textv), tbuffer);
This is pointless, as tbuffer is still the same object as
before, that is, it is still the text buffer of textv.
>
> //g_free(tbuffer); //freeing any of them produces
> segmentation fault
> //g_free(textv); //and if i donot free them then i get a
> 15Kb leak
References to objects are released with g_object_unref(),
please see some intro (the description is in a lot of
places, althout I cannot recommend any particular).
However, since this piece of code seems to *not* own any
reference to the objects, it should not release any either.
Yeti
--
That's enough.
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