#include <form.h>int
free_fieldtype(FIELDTYPE *fieldtype);
FIELDTYPE *
link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2);
FIELDTYPE *
new_fieldtype(int (*field_check)(FIELD *, char *), int (*char_check)(int, char *));
int
set_fieldtype_arg(FIELDTYPE *fieldtype, char * (*make_args)(va_list *), char * (*copy_args)(char *), void (*free_args)(char *));
int
set_fieldtype_choice(FIELDTYPE *fieldtype, int (*next_choice)(FIELD *, char *), int (*prev_choice)(FIELD *, char *));