| |
| Curses Library Functions | form_fieldtype(3CURSES) |
| | 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); |
| |
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.
|
| |
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.
|
| |
See attributes(5) for descriptions of the following
attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | Unsafe |
|
| |
The header <form.h> automatically includes the headers <eti.h> and <curses.h>.
|
| |
