Glib defines these:

#define             G_GINT16_MODIFIER
#define             G_GINT16_FORMAT
#define             G_GUINT16_FORMAT
#define             G_GINT32_MODIFIER
#define             G_GINT32_FORMAT
#define             G_GUINT32_FORMAT
#define             G_GINT64_MODIFIER
#define             G_GINT64_FORMAT
#define             G_GUINT64_FORMAT
#define             G_GSIZE_MODIFIER
#define             G_GSIZE_FORMAT
#define             G_GSSIZE_FORMAT

But these are not linked from gint* docs.  I looked for them there, and around docs for g_printf.  None helped.

Next, the FORMAT docs say they are for scanning and printing, while the MODIFIER docs only say printing.  Does it mean they don't work with scanf?  That doesn't make much sense as, say, for gint16, printing is automatic and doesn't need any modifier (because int16 is promoted to int), but scanning always needs the right modifier.

Currently the docs do not provide any way to correctly read a guint32 from hex.  I need this for, say, reading a "U+1234" representation of a gunichar.