form_fieldtype(3CURSES) Curses Library Functions form_fieldtype(3CURSES)
NAME
form_fieldtype, new_fieldtype, free_fieldtype, set_fieldtype_arg, set_fieldtype_choice, link_fieldtype - forms fieldtype routines
SYNOPSIS
cc [ flag... ] file... -lform -lcurses [ library... ]
#include <form.h>
FIELDTYPE *new_fieldtype(int (* field_check)(FIELD *, char *), int (*char_check)(int, char *));
int free_fieldtype(FIELDTYPE *fieldtype);
int set_fieldtype_arg(FIELDTYPE *fieldtype, char *(* mak_arg)(va_list *), char *(* copy_arg)(char *), void (* free_arg)(char *));
int set_fieldtype_choice(FIELDTYPE *fieldtype, int (* next_choice)(FIELD *, char *), int (*prev_choice)(FIELD *, char *));
FIELDTYPE *link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2);
DESCRIPTION
new_fieldtype() creates a new field type. The application programmer must write the function field_check, which validates the field value,
and the function char_check, which validates each character. free_fieldtype() frees the space allocated for the field type.
By associating function pointers with a field type, set_fieldtype_arg() connects to the field type additional arguments necessary for a
set_field_type() call. Function mak_arg allocates a structure for the field specific parameters to set_field_type() and returns a pointer
to the saved data. Function copy_arg duplicates the structure created by make_arg. Function free_arg frees any storage allocated by
make_arg or copy_arg.
The form_driver() requests REQ_NEXT_CHOICE and REQ_PREV_CHOICE let the user request the next or previous value of a field type comprising
an ordered set of values. set_fieldtype_choice() allows the application programmer to implement these requests for the given field type. It
associates with the given field type those application-defined functions that return pointers to the next or previous choice for the field.
link_fieldtype() returns a pointer to the field type built from the two given types. The constituent types may be any application-defined
or pre-defined types.
RETURN VALUES
Routines that return pointers always return NULL on error. Routines that return an integer return one of the following:
E_OK The function returned successfully.
E_SYSTEM_ERROR System error.
E_BAD_ARGUMENT An argument is incorrect.
E_CONNECTED Type is connected to one or more fields.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
SEE ALSO
curses(3CURSES), forms(3CURSES), attributes(5)
NOTES
The header <form.h> automatically includes the headers <eti.h> and <curses.h>.
SunOS 5.10 31 Dec 1996 form_fieldtype(3CURSES)
