xref: /netbsd-src/sys/dev/wscons/wskbdutil.c (revision 404fbe5fb94ca1e054339640cabb2801ce52dd30)
1 /*	$NetBSD: wskbdutil.c,v 1.15 2008/04/28 20:24:01 martin Exp $	*/
2 
3 /*-
4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Juergen Hannken-Illjes.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: wskbdutil.c,v 1.15 2008/04/28 20:24:01 martin Exp $");
34 
35 #include <sys/param.h>
36 #include <sys/errno.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <dev/wscons/wsksymdef.h>
40 #include <dev/wscons/wsksymvar.h>
41 
42 static struct compose_tab_s {
43 	keysym_t elem[2];
44 	keysym_t result;
45 } compose_tab[] = {
46 	{ { KS_plus,			KS_plus },		KS_numbersign },
47 	{ { KS_a,			KS_a },			KS_at },
48 	{ { KS_parenleft,		KS_parenleft },		KS_bracketleft },
49 	{ { KS_slash,			KS_slash },		KS_backslash },
50 	{ { KS_parenright,		KS_parenright },	KS_bracketright },
51 	{ { KS_parenleft,		KS_minus },		KS_braceleft },
52 	{ { KS_slash,			KS_minus },		KS_bar },
53 	{ { KS_parenright,		KS_minus },		KS_braceright },
54 	{ { KS_exclam,			KS_exclam },		KS_exclamdown },
55 	{ { KS_c,			KS_slash },		KS_cent },
56 	{ { KS_l,			KS_minus },		KS_sterling },
57 	{ { KS_y,			KS_minus },		KS_yen },
58 	{ { KS_s,			KS_o },			KS_section },
59 	{ { KS_x,			KS_o },			KS_currency },
60 	{ { KS_c,			KS_o },			KS_copyright },
61 	{ { KS_less,			KS_less },		KS_guillemotleft },
62 	{ { KS_greater,			KS_greater },		KS_guillemotright },
63 	{ { KS_question,		KS_question },		KS_questiondown },
64 	{ { KS_dead_acute,		KS_space },		KS_acute },
65 	{ { KS_dead_grave,		KS_space },		KS_grave },
66 	{ { KS_dead_tilde,		KS_space },		KS_asciitilde },
67 	{ { KS_dead_circumflex,		KS_space },		KS_asciicircum },
68 	{ { KS_dead_circumflex,		KS_A },			KS_Acircumflex },
69 	{ { KS_dead_diaeresis,		KS_A },			KS_Adiaeresis },
70 	{ { KS_dead_grave,		KS_A },			KS_Agrave },
71 	{ { KS_dead_abovering,		KS_A },			KS_Aring },
72 	{ { KS_dead_tilde,		KS_A },			KS_Atilde },
73 	{ { KS_dead_cedilla,		KS_C },			KS_Ccedilla },
74 	{ { KS_dead_acute,		KS_E },			KS_Eacute },
75 	{ { KS_dead_circumflex,		KS_E },			KS_Ecircumflex },
76 	{ { KS_dead_diaeresis,		KS_E },			KS_Ediaeresis },
77 	{ { KS_dead_grave,		KS_E },			KS_Egrave },
78 	{ { KS_dead_acute,		KS_I },			KS_Iacute },
79 	{ { KS_dead_circumflex,		KS_I },			KS_Icircumflex },
80 	{ { KS_dead_diaeresis,		KS_I },			KS_Idiaeresis },
81 	{ { KS_dead_grave,		KS_I },			KS_Igrave },
82 	{ { KS_dead_tilde,		KS_N },			KS_Ntilde },
83 	{ { KS_dead_acute,		KS_O },			KS_Oacute },
84 	{ { KS_dead_circumflex,		KS_O },			KS_Ocircumflex },
85 	{ { KS_dead_diaeresis,		KS_O },			KS_Odiaeresis },
86 	{ { KS_dead_grave,		KS_O },			KS_Ograve },
87 	{ { KS_dead_tilde,		KS_O },			KS_Otilde },
88 	{ { KS_dead_acute,		KS_U },			KS_Uacute },
89 	{ { KS_dead_circumflex,		KS_U },			KS_Ucircumflex },
90 	{ { KS_dead_diaeresis,		KS_U },			KS_Udiaeresis },
91 	{ { KS_dead_grave,		KS_U },			KS_Ugrave },
92 	{ { KS_dead_acute,		KS_Y },			KS_Yacute },
93 	{ { KS_dead_acute,		KS_a },			KS_aacute },
94 	{ { KS_dead_circumflex,		KS_a },			KS_acircumflex },
95 	{ { KS_dead_diaeresis,		KS_a },			KS_adiaeresis },
96 	{ { KS_dead_grave,		KS_a },			KS_agrave },
97 	{ { KS_dead_abovering,		KS_a },			KS_aring },
98 	{ { KS_dead_tilde,		KS_a },			KS_atilde },
99 	{ { KS_dead_cedilla,		KS_c },			KS_ccedilla },
100 	{ { KS_dead_acute,		KS_e },			KS_eacute },
101 	{ { KS_dead_circumflex,		KS_e },			KS_ecircumflex },
102 	{ { KS_dead_diaeresis,		KS_e },			KS_ediaeresis },
103 	{ { KS_dead_grave,		KS_e },			KS_egrave },
104 	{ { KS_dead_acute,		KS_i },			KS_iacute },
105 	{ { KS_dead_circumflex,		KS_i },			KS_icircumflex },
106 	{ { KS_dead_diaeresis,		KS_i },			KS_idiaeresis },
107 	{ { KS_dead_grave,		KS_i },			KS_igrave },
108 	{ { KS_dead_tilde,		KS_n },			KS_ntilde },
109 	{ { KS_dead_acute,		KS_o },			KS_oacute },
110 	{ { KS_dead_circumflex,		KS_o },			KS_ocircumflex },
111 	{ { KS_dead_diaeresis,		KS_o },			KS_odiaeresis },
112 	{ { KS_dead_grave,		KS_o },			KS_ograve },
113 	{ { KS_dead_tilde,		KS_o },			KS_otilde },
114 	{ { KS_dead_acute,		KS_u },			KS_uacute },
115 	{ { KS_dead_circumflex,		KS_u },			KS_ucircumflex },
116 	{ { KS_dead_diaeresis,		KS_u },			KS_udiaeresis },
117 	{ { KS_dead_grave,		KS_u },			KS_ugrave },
118 	{ { KS_dead_acute,		KS_y },			KS_yacute },
119 	{ { KS_dead_diaeresis,		KS_y },			KS_ydiaeresis },
120 	{ { KS_quotedbl,		KS_A },			KS_Adiaeresis },
121 	{ { KS_quotedbl,		KS_E },			KS_Ediaeresis },
122 	{ { KS_quotedbl,		KS_I },			KS_Idiaeresis },
123 	{ { KS_quotedbl,		KS_O },			KS_Odiaeresis },
124 	{ { KS_quotedbl,		KS_U },			KS_Udiaeresis },
125 	{ { KS_quotedbl,		KS_a },			KS_adiaeresis },
126 	{ { KS_quotedbl,		KS_e },			KS_ediaeresis },
127 	{ { KS_quotedbl,		KS_i },			KS_idiaeresis },
128 	{ { KS_quotedbl,		KS_o },			KS_odiaeresis },
129 	{ { KS_quotedbl,		KS_u },			KS_udiaeresis },
130 	{ { KS_quotedbl,		KS_y },			KS_ydiaeresis },
131 	{ { KS_acute,			KS_A },			KS_Aacute },
132 	{ { KS_asciicircum,		KS_A },			KS_Acircumflex },
133 	{ { KS_grave,			KS_A },			KS_Agrave },
134 	{ { KS_asterisk,		KS_A },			KS_Aring },
135 	{ { KS_asciitilde,		KS_A },			KS_Atilde },
136 	{ { KS_cedilla,			KS_C },			KS_Ccedilla },
137 	{ { KS_acute,			KS_E },			KS_Eacute },
138 	{ { KS_asciicircum,		KS_E },			KS_Ecircumflex },
139 	{ { KS_grave,			KS_E },			KS_Egrave },
140 	{ { KS_acute,			KS_I },			KS_Iacute },
141 	{ { KS_asciicircum,		KS_I },			KS_Icircumflex },
142 	{ { KS_grave,			KS_I },			KS_Igrave },
143 	{ { KS_asciitilde,		KS_N },			KS_Ntilde },
144 	{ { KS_acute,			KS_O },			KS_Oacute },
145 	{ { KS_asciicircum,		KS_O },			KS_Ocircumflex },
146 	{ { KS_grave,			KS_O },			KS_Ograve },
147 	{ { KS_asciitilde,		KS_O },			KS_Otilde },
148 	{ { KS_acute,			KS_U },			KS_Uacute },
149 	{ { KS_asciicircum,		KS_U },			KS_Ucircumflex },
150 	{ { KS_grave,			KS_U },			KS_Ugrave },
151 	{ { KS_acute,			KS_Y },			KS_Yacute },
152 	{ { KS_acute,			KS_a },			KS_aacute },
153 	{ { KS_asciicircum,		KS_a },			KS_acircumflex },
154 	{ { KS_grave,			KS_a },			KS_agrave },
155 	{ { KS_asterisk,		KS_a },			KS_aring },
156 	{ { KS_asciitilde,		KS_a },			KS_atilde },
157 	{ { KS_cedilla,			KS_c },			KS_ccedilla },
158 	{ { KS_acute,			KS_e },			KS_eacute },
159 	{ { KS_asciicircum,		KS_e },			KS_ecircumflex },
160 	{ { KS_grave,			KS_e },			KS_egrave },
161 	{ { KS_acute,			KS_i },			KS_iacute },
162 	{ { KS_asciicircum,		KS_i },			KS_icircumflex },
163 	{ { KS_grave,			KS_i },			KS_igrave },
164 	{ { KS_asciitilde,		KS_n },			KS_ntilde },
165 	{ { KS_acute,			KS_o },			KS_oacute },
166 	{ { KS_asciicircum,		KS_o },			KS_ocircumflex },
167 	{ { KS_grave,			KS_o },			KS_ograve },
168 	{ { KS_asciitilde,		KS_o },			KS_otilde },
169 	{ { KS_acute,			KS_u },			KS_uacute },
170 	{ { KS_asciicircum,		KS_u },			KS_ucircumflex },
171 	{ { KS_grave,			KS_u },			KS_ugrave },
172 	{ { KS_acute,			KS_y },			KS_yacute },
173 	{ { KS_dead_semi,		KS_gr_A },		KS_gr_At  },
174 	{ { KS_dead_semi,		KS_gr_E },		KS_gr_Et  },
175 	{ { KS_dead_semi,		KS_gr_H },		KS_gr_Ht  },
176 	{ { KS_dead_semi,		KS_gr_I },		KS_gr_It  },
177 	{ { KS_dead_semi,		KS_gr_O },		KS_gr_Ot  },
178 	{ { KS_dead_semi,		KS_gr_Y },		KS_gr_Yt  },
179 	{ { KS_dead_semi,		KS_gr_V },		KS_gr_Vt  },
180 	{ { KS_dead_colon,		KS_gr_I },		KS_gr_Id  },
181 	{ { KS_dead_colon,		KS_gr_Y },		KS_gr_Yd  },
182 	{ { KS_dead_semi,		KS_gr_a },		KS_gr_at  },
183 	{ { KS_dead_semi,		KS_gr_e },		KS_gr_et  },
184 	{ { KS_dead_semi,		KS_gr_h },		KS_gr_ht  },
185 	{ { KS_dead_semi,		KS_gr_i },		KS_gr_it  },
186 	{ { KS_dead_semi,		KS_gr_o },		KS_gr_ot  },
187 	{ { KS_dead_semi,		KS_gr_y },		KS_gr_yt  },
188 	{ { KS_dead_semi,		KS_gr_v },		KS_gr_vt  },
189 	{ { KS_dead_colon,		KS_gr_i },		KS_gr_id  },
190 	{ { KS_dead_colon,		KS_gr_y },		KS_gr_yd  }
191 };
192 
193 #define COMPOSE_SIZE	sizeof(compose_tab)/sizeof(compose_tab[0])
194 
195 static int compose_tab_inorder = 0;
196 
197 static inline int compose_tab_cmp(struct compose_tab_s *, struct compose_tab_s *);
198 static keysym_t ksym_upcase(keysym_t);
199 static void fillmapentry(const keysym_t *, int, struct wscons_keymap *);
200 
201 static inline int
202 compose_tab_cmp(struct compose_tab_s *i, struct compose_tab_s *j)
203 {
204 	if (i->elem[0] == j->elem[0])
205 		return(i->elem[1] - j->elem[1]);
206 	else
207 		return(i->elem[0] - j->elem[0]);
208 }
209 
210 keysym_t
211 wskbd_compose_value(keysym_t *compose_buf)
212 {
213 	int i, j, r;
214 	struct compose_tab_s v;
215 
216 	if (! compose_tab_inorder) {
217 		/* Insertion sort. */
218 		for (i = 1; i < COMPOSE_SIZE; i++) {
219 			v = compose_tab[i];
220 			/* find correct slot, moving others up */
221 			for (j = i; --j >= 0 && compose_tab_cmp(& v, & compose_tab[j]) < 0; )
222 				compose_tab[j + 1] = compose_tab[j];
223 			compose_tab[j + 1] = v;
224 		}
225 		compose_tab_inorder = 1;
226 	}
227 
228 	for (j = 0, i = COMPOSE_SIZE; i != 0; i /= 2) {
229 		if (compose_tab[j + i/2].elem[0] == compose_buf[0]) {
230 			if (compose_tab[j + i/2].elem[1] == compose_buf[1])
231 				return(compose_tab[j + i/2].result);
232 			r = compose_tab[j + i/2].elem[1] < compose_buf[1];
233 		} else
234 			r = compose_tab[j + i/2].elem[0] < compose_buf[0];
235 		if (r) {
236 			j += i/2 + 1;
237 			i--;
238 		}
239 	}
240 
241 	return(KS_voidSymbol);
242 }
243 
244 static const u_char latin1_to_upper[256] = {
245 /*      0  8  1  9  2  a  3  b  4  c  5  d  6  e  7  f               */
246 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 0 */
247 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 0 */
248 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 1 */
249 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 1 */
250 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 2 */
251 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 2 */
252 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 3 */
253 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 3 */
254 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 4 */
255 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 4 */
256 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 5 */
257 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 5 */
258 	0x00,  'A',  'B',  'C',  'D',  'E',  'F',  'G',		/* 6 */
259 	 'H',  'I',  'J',  'K',  'L',  'M',  'N',  'O',		/* 6 */
260 	 'P',  'Q',  'R',  'S',  'T',  'U',  'V',  'W',		/* 7 */
261 	 'X',  'Y',  'Z', 0x00, 0x00, 0x00, 0x00, 0x00,		/* 7 */
262 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 8 */
263 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 8 */
264 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 9 */
265 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* 9 */
266 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* a */
267 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* a */
268 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* b */
269 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* b */
270 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* c */
271 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* c */
272 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* d */
273 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		/* d */
274 	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,		/* e */
275 	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,		/* e */
276 	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0x00,		/* f */
277 	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0x00,		/* f */
278 };
279 
280 static keysym_t
281 ksym_upcase(keysym_t ksym)
282 {
283 	if (ksym >= KS_f1 && ksym <= KS_f20)
284 		return(KS_F1 - KS_f1 + ksym);
285 
286 	if (KS_GROUP(ksym) == KS_GROUP_Ascii && ksym <= 0xff &&
287 	    latin1_to_upper[ksym] != 0x00)
288 		return(latin1_to_upper[ksym]);
289 
290 	return(ksym);
291 }
292 
293 static void
294 fillmapentry(const keysym_t *kp, int len, struct wscons_keymap *mapentry)
295 {
296 	switch (len) {
297 	case 0:
298 		mapentry->group1[0] = KS_voidSymbol;
299 		mapentry->group1[1] = KS_voidSymbol;
300 		mapentry->group2[0] = KS_voidSymbol;
301 		mapentry->group2[1] = KS_voidSymbol;
302 		break;
303 
304 	case 1:
305 		mapentry->group1[0] = kp[0];
306 		mapentry->group1[1] = ksym_upcase(kp[0]);
307 		mapentry->group2[0] = mapentry->group1[0];
308 		mapentry->group2[1] = mapentry->group1[1];
309 		break;
310 
311 	case 2:
312 		mapentry->group1[0] = kp[0];
313 		mapentry->group1[1] = kp[1];
314 		mapentry->group2[0] = mapentry->group1[0];
315 		mapentry->group2[1] = mapentry->group1[1];
316 		break;
317 
318 	case 3:
319 		mapentry->group1[0] = kp[0];
320 		mapentry->group1[1] = kp[1];
321 		mapentry->group2[0] = kp[2];
322 		mapentry->group2[1] = ksym_upcase(kp[2]);
323 		break;
324 
325 	case 4:
326 		mapentry->group1[0] = kp[0];
327 		mapentry->group1[1] = kp[1];
328 		mapentry->group2[0] = kp[2];
329 		mapentry->group2[1] = kp[3];
330 		break;
331 
332 	}
333 }
334 
335 void
336 wskbd_get_mapentry(const struct wskbd_mapdata *mapdata, int kc,
337 	struct wscons_keymap *mapentry)
338 {
339 	kbd_t cur;
340 	const keysym_t *kp;
341 	const struct wscons_keydesc *mp;
342 	int l;
343 
344 	mapentry->command = KS_voidSymbol;
345 	mapentry->group1[0] = KS_voidSymbol;
346 	mapentry->group1[1] = KS_voidSymbol;
347 	mapentry->group2[0] = KS_voidSymbol;
348 	mapentry->group2[1] = KS_voidSymbol;
349 
350 	for (cur = mapdata->layout & ~KB_HANDLEDBYWSKBD; cur != 0; ) {
351 		mp = mapdata->keydesc;
352 		while (mp->map_size > 0) {
353 			if (mp->name == cur)
354 				break;
355 			mp++;
356 		}
357 
358 		/* If map not found, return */
359 		if (mp->map_size <= 0)
360 			return;
361 
362 		for (kp = mp->map; kp < mp->map + mp->map_size; kp++)
363 			if (KS_GROUP(*kp) == KS_GROUP_Keycode &&
364 			    KS_VALUE(*kp) == kc) {
365 				/* First skip keycode and possible command */
366 				kp++;
367 				if (KS_GROUP(*kp) == KS_GROUP_Command ||
368 				    *kp == KS_Cmd || *kp == KS_Cmd1 || *kp == KS_Cmd2)
369 					mapentry->command = *kp++;
370 
371 				for (l = 0; kp + l < mp->map + mp->map_size; l++)
372 					if (KS_GROUP(kp[l]) == KS_GROUP_Keycode)
373 						break;
374 				if (l > 4)
375 					panic("wskbd_get_mapentry: %d(%d): bad entry",
376 					      mp->name, *kp);
377 				fillmapentry(kp, l, mapentry);
378 				return;
379 			}
380 
381 		cur = mp->base;
382 	}
383 }
384 
385 void
386 wskbd_init_keymap(int newlen, struct wscons_keymap **map, int *maplen)
387 {
388 	int i;
389 
390 	if (newlen != *maplen) {
391 		if (*maplen > 0)
392 			free(*map, M_TEMP);
393 		*maplen = newlen;
394 		*map = malloc(newlen*sizeof(struct wscons_keymap),
395 			      M_TEMP, M_WAITOK);
396 	}
397 
398 	for (i = 0; i < *maplen; i++) {
399 		(*map)[i].command = KS_voidSymbol;
400 		(*map)[i].group1[0] = KS_voidSymbol;
401 		(*map)[i].group1[1] = KS_voidSymbol;
402 		(*map)[i].group2[0] = KS_voidSymbol;
403 		(*map)[i].group2[1] = KS_voidSymbol;
404 	}
405 }
406 
407 int
408 wskbd_load_keymap(const struct wskbd_mapdata *mapdata,
409 	struct wscons_keymap **map, int *maplen)
410 {
411 	int i, s, kc, stack_ptr;
412 	const keysym_t *kp;
413 	const struct wscons_keydesc *mp, *stack[10];
414 	kbd_t cur;
415 
416 	for (cur = mapdata->layout & ~KB_HANDLEDBYWSKBD, stack_ptr = 0;
417 	     cur != 0; stack_ptr++) {
418 		mp = mapdata->keydesc;
419 		while (mp->map_size > 0) {
420 			if (cur == 0 || mp->name == cur) {
421 				break;
422 			}
423 			mp++;
424 		}
425 
426 		if (stack_ptr == sizeof(stack)/sizeof(stack[0]))
427 			panic("wskbd_load_keymap: %d: recursion too deep",
428 			      mapdata->layout);
429 		if (mp->map_size <= 0)
430 			return(EINVAL);
431 
432 		stack[stack_ptr] = mp;
433 		cur = mp->base;
434 	}
435 
436 	for (i = 0, s = stack_ptr - 1; s >= 0; s--) {
437 		mp = stack[s];
438 		for (kp = mp->map; kp < mp->map + mp->map_size; kp++)
439 			if (KS_GROUP(*kp) == KS_GROUP_Keycode && KS_VALUE(*kp) > i)
440 				i = KS_VALUE(*kp);
441 	}
442 
443 	wskbd_init_keymap(i + 1, map, maplen);
444 
445 	for (s = stack_ptr - 1; s >= 0; s--) {
446 		mp = stack[s];
447 		for (kp = mp->map; kp < mp->map + mp->map_size; ) {
448 			if (KS_GROUP(*kp) != KS_GROUP_Keycode)
449 				panic("wskbd_load_keymap: %d(%d): bad entry",
450 				      mp->name, *kp);
451 
452 			kc = KS_VALUE(*kp);
453 			kp++;
454 
455 			if (KS_GROUP(*kp) == KS_GROUP_Command ||
456 			    *kp == KS_Cmd || *kp == KS_Cmd1 || *kp == KS_Cmd2) {
457 				(*map)[kc].command = *kp;
458 				kp++;
459 			}
460 
461 			for (i = 0; kp + i < mp->map + mp->map_size; i++)
462 				if (KS_GROUP(kp[i]) == KS_GROUP_Keycode)
463 					break;
464 
465 			if (i > 4)
466 				panic("wskbd_load_keymap: %d(%d): bad entry",
467 				      mp->name, *kp);
468 
469 			fillmapentry(kp, i, &(*map)[kc]);
470 			kp += i;
471 		}
472 	}
473 
474 	return(0);
475 }
476