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/* $OpenBSD: keyok.c,v 1.5 2010/01/12 23:22:05 nicm Exp $ */
/****************************************************************************
* Copyright (c) 1998-2000,2006 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Thomas E. Dickey 1997-on *
****************************************************************************/
#include <curses.priv.h>
MODULE_ID("$Id: keyok.c,v 1.5 2010/01/12 23:22:05 nicm 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 (c >= 0) {
unsigned ch = (unsigned) c;
if (flag) {
while ((s = _nc_expand_try(SP->_key_ok, ch, &count, 0)) != 0
&& _nc_remove_key(&(SP->_key_ok), ch)) {
code = _nc_add_to_try(&(SP->_keytry), s, ch);
free(s);
count = 0;
if (code != OK)
break;
}
} else {
while ((s = _nc_expand_try(SP->_keytry, ch, &count, 0)) != 0
&& _nc_remove_key(&(SP->_keytry), ch)) {
code = _nc_add_to_try(&(SP->_key_ok), s, ch);
free(s);
count = 0;
if (code != OK)
break;
}
}
}
returnCode(code);
}
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