gsize g_strlcpy (gchar *dest, const gchar *src, gsize dest_size);
+gchar g_ascii_tolower (gchar c);
gchar *g_ascii_strdown (const gchar *str, gssize len);
gint g_ascii_strncasecmp (const gchar *s1, const gchar *s2, gsize n);
gint g_ascii_xdigit_value (gchar c);