+.PP
+.B "enum {"
+.B " PKBUF_ENABLE = ..."
+.B "};"
+.PP
+.B "typedef struct {"
+.B " unsigned f;"
+.B " ..."
+.B "} pkbuf;"
+.PP
+.ta \w'\fBtypedef void pkbuf_func('u
+.B "typedef void pkbuf_func(octet *" b ", size_t " sz ", pkbuf *" p ,
+.BI " size_t *" keep ", void *" p );
+.PP