ungetch, unget_wch Subroutine

Purpose

Pushes a character onto the input queue.

Library

Curses Library (libcurses.a)

Syntax

#include <curses.h>

int ungetch
(int ch);

int unget_wch
(const wchar_t wch);

Description

The ungetch subroutine pushes the single-byte character ch onto the head of the input queue.

The unget_wch subroutine pushes the wide character wch onto the head of the input queue.

One character of push-back is guaranteed. The result of successive calls without an intervening call to the getch or get_wch subroutine are unspecified.

Parameters

Examples

To force the key KEY_ENTER back into the queue, use:

ungetch(KEY_ENTER);

Implementation Specifics

This subroutine is part of Base Operation System (BOS) Runtime.

Related Information

The getch and get_wch subroutines, wgetch subroutine.

Curses Overview for Programming and List of Curses Subroutines in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.

Manipulating Characters with Curses in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.