keyok.c

ncurses-5.4

/****************************************************************************
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/****************************************************************************
 *  Author: Thomas E. Dickey <[e-mail]> 1997                        *
 ****************************************************************************/

#include <curses.priv.h>

MODULE_ID("$Id: keyok.c,v 1.5 2000/12/10 02:43:26 tom Exp $")

/*
 * Enable (or disable) ncurses' interpretation of a keycode by adding (or
 * removing) the corresponding 'tries' entry.
 *
 * Do this by storing a second tree of tries, which records the disabled keys. 
 * The simplest way to copy is to make a function that returns the string (with
 * nulls set to 0200), then use that to reinsert the string into the
 * corresponding tree.
 */

NCURSES_EXPORT(int)
keyok(int c, bool flag)
{
    int code = ERR;
    int count = 0;
    char *s;

    T((T_CALLED("keyok(%d,%d)"), c, flag));
    if (flag) {
	while ((s = _nc_expand_try(SP->_key_ok, c, &count, 0)) != 0
	       && _nc_remove_key(&(SP->_key_ok), c)) {
	    _nc_add_to_try(&(SP->_keytry), s, c);
	    free(s);
	    code = OK;
	    count = 0;
	}
    } else {
	while ((s = _nc_expand_try(SP->_keytry, c, &count, 0)) != 0
	       && _nc_remove_key(&(SP->_keytry), c)) {
	    _nc_add_to_try(&(SP->_key_ok), s, c);
	    free(s);
	    code = OK;
	    count = 0;
	}
    }
    returnCode(code);
}