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.\" $Id: menu_pattern.3x,v 1.36 2023/11/25 13:58:47 tom Exp $
.TH pattern 3MENU 2023-11-25 "ncurses 6.4" "Library calls"
.SH NAME
\fBset_menu_pattern\fP,
\fBmenu_pattern\fP \-
set and get a menu's pattern buffer
.SH SYNOPSIS
.nf
\fB#include <menu.h>
.PP
\fBint set_menu_pattern(MENU *\fImenu\fP, const char *\fIpattern\fP);
\fBchar *menu_pattern(const MENU *\fImenu\fP);
.fi
.SH DESCRIPTION
Every menu has an associated pattern match buffer.
As input events that are
printable characters come in, they are appended to this match buffer
and tested for a match, as described in \fB\%driver\fP(3MENU).
.PP
The function \fBset_menu_pattern\fP sets the pattern buffer for the given menu
and tries to find the first matching item.
If it succeeds, that item becomes
current; if not, the current item does not change.
.PP
The function \fBmenu_pattern\fP returns the pattern buffer of the given
\fImenu\fP.
.SH RETURN VALUE
The function \fBmenu_pattern\fP returns a pointer,
which is \fBNULL\fP if the \fImenu\fP parameter is \fBNULL\fP.
Otherwise, it is a pointer to a string which is empty
if no pattern has been set.
It does not set \fBerrno\fP.
.PP
The function \fBset_menu_pattern\fP may return the following error codes:
.TP 5
.B E_OK
The routine succeeded.
.TP 5
.B E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
.TP 5
.B E_BAD_STATE
Routine was called from an initialization or termination function.
.TP 5
.B E_NOT_CONNECTED
No items are connected to menu.
.TP 5
.B E_NO_MATCH
Character failed to match.
.TP 5
.B E_SYSTEM_ERROR
System error occurred (see \fBerrno\fP(3)).
.SH PORTABILITY
These routines emulate the System V menu library.
They were not supported on
Version 7 or BSD versions.
.SH AUTHORS
Juergen Pfeifer.
Manual pages and adaptation for new curses by Eric S. Raymond.
.SH SEE ALSO
\fB\%ncurses\fP(3NCURSES),
\fB\%menu\fP(3MENU)