/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*LINTLIBRARY*/

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "curses_inc.h"

/* Delete keys matching pat or key from the key map. */

int
delkey(char *sends, int keyval)
{
        _KEY_MAP        *kp, **kpp = cur_term->_keys, **fpp, **dpp;
        int             mask = 0, cmp, numkeys = cur_term->_ksz;
        int             counter = 0, i, num_deleted_keys = 0;
        short           *lkorder = &(cur_term->_lastkey_ordered),
                        *first_macro = &(cur_term->_first_macro),
                        *lmorder = &(cur_term->_lastmacro_ordered);

        /* for ease of determination of key to delete */
        if (sends)
                mask |= 01;
        if (keyval >= 0)
                mask |= 02;

        /* check each key */
        while (++counter < numkeys) {
                kp = *kpp;
                cmp = 0;
                if (sends && (strcmp(sends, kp->_sends) == 0))
                        cmp |= 01;
                if (kp->_keyval == keyval)
                        cmp |= 02;

                /* found one to delete */
                if (cmp == mask) {
                        num_deleted_keys++;
                        /*
                         * If it was an externally created key, then the address
                         * of the sequence will be right after the structure.
                         * See the malloc in newkey.
                         */
                        if (kp->_sends == ((char *)kp + sizeof (_KEY_MAP)))
                                free(kp);

                        /* shift left other keys */
                        i = (numkeys - counter) - 1;
                        for (fpp = kpp, dpp = kpp + 1; i > 0; i--, fpp++, dpp++)
                                *fpp = *dpp;
                        if (counter <= *lmorder) {
                                if (counter < *first_macro) {
                                        if (counter <= *lkorder)
                                                (*lkorder)--;
                                        (*first_macro)--;
                                }
                                (*lmorder)--;
                        }
                } else
                        kpp++;
        }

/* Check if we've crossed boundary and/or hit 0 */

        if ((cur_term->_ksz -= num_deleted_keys) == 0)
                (void) delkeymap(cur_term);
        else
                cur_term->_keys = (_KEY_MAP **) realloc((char *)
                    cur_term->_keys, (unsigned)cur_term->_ksz);

        return (num_deleted_keys);
}