FORMS(3) | Library Functions Manual | FORMS(3) |
free_fieldtype
, link_fieldtype
,
new_fieldtype
,
set_fieldtype_arg
,
set_fieldtype_choice
—
#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 *));
free_fieldtype
() frees the storage
associated with the field type and destroys it. The function
link_fieldtype
() links together the two given field
types to produce a new field type. A new field type can be created by calling
new_fieldtype
() which requires pointers to two
functions which perform validation, the field_check
function must validate the field contents and return
TRUE
if they are acceptable and
FALSE
if they are not. The
char_check validates the character input into the field,
this function will be called for each character entered, if the character can
be entered into the field then char_check must return
TRUE
. Neither field_check nor
char_check may be NULL
. The
functions for handling the field type arguments can be defined by using the
set_fieldtype_arg
() function, the
make_args function is used to create new arguments for
the fieldtype, the copy_args is used to copy the
fieldtype arguments to a new arguments structure and
free_args is used to destroy the fieldtype arguments and
release any associated storage, none of these function pointers may be
NULL
. The field type choice functions can be set by
calling set_fieldtype_choice
(), the
next_choice and prev_choice
specify the next and previous choice functions for the field type. These
functions must perform the necessary actions to select the next or previous
choice for the field, updating the field buffer if necessary. The choice
functions must return TRUE
if the function succeeded
and FALSE
otherwise.
NULL
if an
error is detected. The functions that return an int will return one of the
following error values:
E_OK
E_BAD_ARGUMENT
E_CONNECTED
<form.h>
automatically includes both
<curses.h>
and
<eti.h>
.
January 1, 2001 | NetBSD 9.0 |