Function pgx::varlena::varsize_any_exhdr

pub unsafe fn varsize_any_exhdr(ptr: *const varlena) -> usize

/* Size of a varlena data, excluding header */
#define VARSIZE_ANY_EXHDR(PTR) \
            (VARATT_IS_1B_E(PTR) ? \
             VARSIZE_EXTERNAL(PTR)-VARHDRSZ_EXTERNAL : \
                  ( \
                 VARATT_IS_1B(PTR) ? \
                       VARSIZE_1B(PTR)-VARHDRSZ_SHORT : \
                            VARSIZE_4B(PTR)-VARHDRSZ \
              ) \
        )