from http://git.gnome.org/browse/glib/tree/gio/gcontenttype.c
we have the definition for this function as below, where
*result_uncertain is never assigned.
char *
g_content_type_guess (const char *filename,
const guchar *data,
gsize data_size,
gboolean *result_uncertain)
{
char *basename;
char *type;
char *dot;
type = NULL;
if (filename)
{
basename = g_path_get_basename (filename);
dot = strrchr (basename, '.');
if (dot)
type = g_strdup (dot);
g_free (basename);
}
if (type)
return type;
if (data && looks_like_text (data, data_size))
return g_strdup (".txt");
return g_strdup ("*");
}
Best Regards
Shixin Zeng
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