FIELDTYPE *new_fieldtype(
bool (* const field_check)(FIELD *, const void *),
bool (* const char_check)(int, const void *));
.br
int free_fieldtype(FIELDTYPE *fieldtype);
FIELDTYPE *new_fieldtype(
bool (* const field_check)(FIELD *, const void *),
bool (* const char_check)(int, const void *));
.br
int free_fieldtype(FIELDTYPE *fieldtype);