keypad.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1995-1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/* LINTLIBRARY */
30
31/*
32 * keypad.c
33 *
34 * XCurses Library
35 *
36 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
37 *
38 */
39
40#ifdef M_RCSID
41#ifndef lint
42static char rcsID[] =
43"$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
44"libxcurses/src/libc/xcurses/rcs/keypad.c 1.6 1998/06/03 12:56:59 "
45"cbates Exp $";
46#endif
47#endif
48
49#include <private.h>
50#include <stdlib.h>
51
52/*
53 * Add a function key string to the decode tree.
54 * Return -1 on error, else the length of the key sequence.
55 */
56static int
57decode_add(t_decode **root, const char *str, short code)
58{
59	const char	*start;
60	t_decode	*node, *saved;
61
62	if (root == NULL)
63		return (-1);
64
65	if (str == NULL)
66		return (0);
67
68	start = str;
69	saved = NULL;
70
71	if (*root == NULL) {
72		/* First node of tree. */
73		node = (t_decode *) malloc(sizeof (*node));
74		if (node == NULL)
75			return (-1);
76
77		*root = saved = node;
78
79		node->child = node->sibling = NULL;
80		node->ch = *str++;
81		node->key = 0;
82	} else {
83		/* Find node to insert function key sequence into the tree. */
84		for (node = *root; *str != '\0'; ++str, node = node->child) {
85			while (node->ch != *str &&
86				node->sibling != NULL)
87				node = node->sibling;
88
89			if (node->ch != *str) {
90				node->sibling = (t_decode *)
91					malloc(sizeof (*node));
92				if (node->sibling == NULL)
93					return (-1);
94
95				saved = node = node->sibling;
96				node->child = node->sibling = NULL;
97				node->ch = *str++;
98				node->key = 0;
99				break;
100			}
101
102			if (node->child == NULL)
103				break;
104		}
105	}
106
107	/* Insert string into the tree; node->child == null. */
108	while (*str != '\0') {
109		node->child = (t_decode *) malloc(sizeof (*node));
110		if (node->child == NULL) {
111			__m_decode_free(&saved);
112			return (-1);
113		}
114
115		node = node->child;
116		node->child = node->sibling = NULL;
117		node->ch = *str++;
118		node->key = 0;
119	}
120
121	node->key = code;
122
123	/* (str - start) should be enough small to fit in "int" */
124	return ((int)(str - start));
125}
126
127
128void
129__m_decode_free(t_decode **tree)
130{
131	if (*tree != NULL) {
132		__m_decode_free(&(*tree)->sibling);
133		__m_decode_free(&(*tree)->child);
134		free(*tree);
135		*tree = NULL;
136	}
137}
138
139/*
140 * Initialise the function key decode tree.
141 */
142int
143__m_decode_init(t_decode **tree)
144{
145	int	max, len;
146	const short	(*p)[2];
147
148	*tree = NULL;
149
150	for (max = -1, p = __m_keyindex; **p != -1; ++p) {
151		len = decode_add(tree, cur_term->_str[**p], (*p)[1]);
152		if (len < 0)
153			return (-1);
154		if (max < len)
155			max = len;
156	}
157
158	return (max);
159}
160
161/*
162 * When true for a given window, then multibyte function key processing
163 * is done for all input throough that window, see wgetch().
164 */
165int
166keypad(WINDOW *w, bool bf)
167{
168	if (bf) {
169		if (keypad_xmit)
170			(void) TPUTS(keypad_xmit, 1, __m_outc);
171		w->_flags |= W_USE_KEYPAD;
172	} else {
173		if (keypad_local)
174			(void) TPUTS(keypad_local, 1, __m_outc);
175		w->_flags &= ~W_USE_KEYPAD;
176	}
177	return (OK);
178}
179