scsi: esp: check buffer length before reading scsi command
[qemu.git] / ui / curses.c
1 /*
2 * QEMU curses/ncurses display driver
3 *
4 * Copyright (c) 2005 Andrzej Zaborowski <balrog@zabor.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include <curses.h>
26
27 #ifndef _WIN32
28 #include <sys/ioctl.h>
29 #include <termios.h>
30 #endif
31
32 #include "qemu-common.h"
33 #include "ui/console.h"
34 #include "ui/input.h"
35 #include "sysemu/sysemu.h"
36
37 #define FONT_HEIGHT 16
38 #define FONT_WIDTH 8
39
40 static DisplayChangeListener *dcl;
41 static console_ch_t screen[160 * 100];
42 static WINDOW *screenpad = NULL;
43 static int width, height, gwidth, gheight, invalidate;
44 static int px, py, sminx, sminy, smaxx, smaxy;
45
46 chtype vga_to_curses[256];
47
48 static void curses_update(DisplayChangeListener *dcl,
49 int x, int y, int w, int h)
50 {
51 chtype *line;
52
53 line = ((chtype *) screen) + y * width;
54 for (h += y; y < h; y ++, line += width)
55 mvwaddchnstr(screenpad, y, 0, line, width);
56
57 pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
58 refresh();
59 }
60
61 static void curses_calc_pad(void)
62 {
63 if (qemu_console_is_fixedsize(NULL)) {
64 width = gwidth;
65 height = gheight;
66 } else {
67 width = COLS;
68 height = LINES;
69 }
70
71 if (screenpad)
72 delwin(screenpad);
73
74 clear();
75 refresh();
76
77 screenpad = newpad(height, width);
78
79 if (width > COLS) {
80 px = (width - COLS) / 2;
81 sminx = 0;
82 smaxx = COLS;
83 } else {
84 px = 0;
85 sminx = (COLS - width) / 2;
86 smaxx = sminx + width;
87 }
88
89 if (height > LINES) {
90 py = (height - LINES) / 2;
91 sminy = 0;
92 smaxy = LINES;
93 } else {
94 py = 0;
95 sminy = (LINES - height) / 2;
96 smaxy = sminy + height;
97 }
98 }
99
100 static void curses_resize(DisplayChangeListener *dcl,
101 int width, int height)
102 {
103 if (width == gwidth && height == gheight) {
104 return;
105 }
106
107 gwidth = width;
108 gheight = height;
109
110 curses_calc_pad();
111 }
112
113 #if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
114 static volatile sig_atomic_t got_sigwinch;
115 static void curses_winch_check(void)
116 {
117 struct winsize {
118 unsigned short ws_row;
119 unsigned short ws_col;
120 unsigned short ws_xpixel; /* unused */
121 unsigned short ws_ypixel; /* unused */
122 } ws;
123
124 if (!got_sigwinch) {
125 return;
126 }
127 got_sigwinch = false;
128
129 if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
130 return;
131 }
132
133 resize_term(ws.ws_row, ws.ws_col);
134 invalidate = 1;
135 }
136
137 static void curses_winch_handler(int signum)
138 {
139 got_sigwinch = true;
140 }
141
142 static void curses_winch_init(void)
143 {
144 struct sigaction old, winch = {
145 .sa_handler = curses_winch_handler,
146 };
147 sigaction(SIGWINCH, &winch, &old);
148 }
149 #else
150 static void curses_winch_check(void) {}
151 static void curses_winch_init(void) {}
152 #endif
153
154 static void curses_cursor_position(DisplayChangeListener *dcl,
155 int x, int y)
156 {
157 if (x >= 0) {
158 x = sminx + x - px;
159 y = sminy + y - py;
160
161 if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
162 move(y, x);
163 curs_set(1);
164 /* it seems that curs_set(1) must always be called before
165 * curs_set(2) for the latter to have effect */
166 if (!qemu_console_is_graphic(NULL)) {
167 curs_set(2);
168 }
169 return;
170 }
171 }
172
173 curs_set(0);
174 }
175
176 /* generic keyboard conversion */
177
178 #include "curses_keys.h"
179
180 static kbd_layout_t *kbd_layout = NULL;
181
182 static void curses_refresh(DisplayChangeListener *dcl)
183 {
184 int chr, nextchr, keysym, keycode, keycode_alt;
185
186 curses_winch_check();
187
188 if (invalidate) {
189 clear();
190 refresh();
191 curses_calc_pad();
192 graphic_hw_invalidate(NULL);
193 invalidate = 0;
194 }
195
196 graphic_hw_text_update(NULL, screen);
197
198 nextchr = ERR;
199 while (1) {
200 /* while there are any pending key strokes to process */
201 if (nextchr == ERR)
202 chr = getch();
203 else {
204 chr = nextchr;
205 nextchr = ERR;
206 }
207
208 if (chr == ERR)
209 break;
210
211 #ifdef KEY_RESIZE
212 /* this shouldn't occur when we use a custom SIGWINCH handler */
213 if (chr == KEY_RESIZE) {
214 clear();
215 refresh();
216 curses_calc_pad();
217 curses_update(dcl, 0, 0, width, height);
218 continue;
219 }
220 #endif
221
222 keycode = curses2keycode[chr];
223 keycode_alt = 0;
224
225 /* alt key */
226 if (keycode == 1) {
227 nextchr = getch();
228
229 if (nextchr != ERR) {
230 chr = nextchr;
231 keycode_alt = ALT;
232 keycode = curses2keycode[nextchr];
233 nextchr = ERR;
234
235 if (keycode != -1) {
236 keycode |= ALT;
237
238 /* process keys reserved for qemu */
239 if (keycode >= QEMU_KEY_CONSOLE0 &&
240 keycode < QEMU_KEY_CONSOLE0 + 9) {
241 erase();
242 wnoutrefresh(stdscr);
243 console_select(keycode - QEMU_KEY_CONSOLE0);
244
245 invalidate = 1;
246 continue;
247 }
248 }
249 }
250 }
251
252 if (kbd_layout) {
253 keysym = -1;
254 if (chr < CURSES_KEYS)
255 keysym = curses2keysym[chr];
256
257 if (keysym == -1) {
258 if (chr < ' ') {
259 keysym = chr + '@';
260 if (keysym >= 'A' && keysym <= 'Z')
261 keysym += 'a' - 'A';
262 keysym |= KEYSYM_CNTRL;
263 } else
264 keysym = chr;
265 }
266
267 keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK);
268 if (keycode == 0)
269 continue;
270
271 keycode |= (keysym & ~KEYSYM_MASK) >> 16;
272 keycode |= keycode_alt;
273 }
274
275 if (keycode == -1)
276 continue;
277
278 if (qemu_console_is_graphic(NULL)) {
279 /* since terminals don't know about key press and release
280 * events, we need to emit both for each key received */
281 if (keycode & SHIFT) {
282 qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
283 qemu_input_event_send_key_delay(0);
284 }
285 if (keycode & CNTRL) {
286 qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
287 qemu_input_event_send_key_delay(0);
288 }
289 if (keycode & ALT) {
290 qemu_input_event_send_key_number(NULL, ALT_CODE, true);
291 qemu_input_event_send_key_delay(0);
292 }
293 if (keycode & ALTGR) {
294 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
295 qemu_input_event_send_key_delay(0);
296 }
297
298 qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
299 qemu_input_event_send_key_delay(0);
300 qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
301 qemu_input_event_send_key_delay(0);
302
303 if (keycode & ALTGR) {
304 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);
305 qemu_input_event_send_key_delay(0);
306 }
307 if (keycode & ALT) {
308 qemu_input_event_send_key_number(NULL, ALT_CODE, false);
309 qemu_input_event_send_key_delay(0);
310 }
311 if (keycode & CNTRL) {
312 qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
313 qemu_input_event_send_key_delay(0);
314 }
315 if (keycode & SHIFT) {
316 qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
317 qemu_input_event_send_key_delay(0);
318 }
319 } else {
320 keysym = curses2qemu[chr];
321 if (keysym == -1)
322 keysym = chr;
323
324 kbd_put_keysym(keysym);
325 }
326 }
327 }
328
329 static void curses_atexit(void)
330 {
331 endwin();
332 }
333
334 static void curses_setup(void)
335 {
336 int i, colour_default[8] = {
337 [QEMU_COLOR_BLACK] = COLOR_BLACK,
338 [QEMU_COLOR_BLUE] = COLOR_BLUE,
339 [QEMU_COLOR_GREEN] = COLOR_GREEN,
340 [QEMU_COLOR_CYAN] = COLOR_CYAN,
341 [QEMU_COLOR_RED] = COLOR_RED,
342 [QEMU_COLOR_MAGENTA] = COLOR_MAGENTA,
343 [QEMU_COLOR_YELLOW] = COLOR_YELLOW,
344 [QEMU_COLOR_WHITE] = COLOR_WHITE,
345 };
346
347 /* input as raw as possible, let everything be interpreted
348 * by the guest system */
349 initscr(); noecho(); intrflush(stdscr, FALSE);
350 nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
351 start_color(); raw(); scrollok(stdscr, FALSE);
352
353 /* Make color pair to match color format (3bits bg:3bits fg) */
354 for (i = 0; i < 64; i++) {
355 init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
356 }
357 /* Set default color for more than 64 for safety. */
358 for (i = 64; i < COLOR_PAIRS; i++) {
359 init_pair(i, COLOR_WHITE, COLOR_BLACK);
360 }
361
362 /*
363 * Setup mapping for vga to curses line graphics.
364 * FIXME: for better font, have to use ncursesw and setlocale()
365 */
366 #if 0
367 /* FIXME: map from where? */
368 ACS_S1;
369 ACS_S3;
370 ACS_S7;
371 ACS_S9;
372 #endif
373 /* ACS_* is not constant. So, we can't initialize statically. */
374 vga_to_curses['\0'] = ' ';
375 vga_to_curses[0x04] = ACS_DIAMOND;
376 vga_to_curses[0x0a] = ACS_RARROW;
377 vga_to_curses[0x0b] = ACS_LARROW;
378 vga_to_curses[0x18] = ACS_UARROW;
379 vga_to_curses[0x19] = ACS_DARROW;
380 vga_to_curses[0x9c] = ACS_STERLING;
381 vga_to_curses[0xb0] = ACS_BOARD;
382 vga_to_curses[0xb1] = ACS_CKBOARD;
383 vga_to_curses[0xb3] = ACS_VLINE;
384 vga_to_curses[0xb4] = ACS_RTEE;
385 vga_to_curses[0xbf] = ACS_URCORNER;
386 vga_to_curses[0xc0] = ACS_LLCORNER;
387 vga_to_curses[0xc1] = ACS_BTEE;
388 vga_to_curses[0xc2] = ACS_TTEE;
389 vga_to_curses[0xc3] = ACS_LTEE;
390 vga_to_curses[0xc4] = ACS_HLINE;
391 vga_to_curses[0xc5] = ACS_PLUS;
392 vga_to_curses[0xce] = ACS_LANTERN;
393 vga_to_curses[0xd8] = ACS_NEQUAL;
394 vga_to_curses[0xd9] = ACS_LRCORNER;
395 vga_to_curses[0xda] = ACS_ULCORNER;
396 vga_to_curses[0xdb] = ACS_BLOCK;
397 vga_to_curses[0xe3] = ACS_PI;
398 vga_to_curses[0xf1] = ACS_PLMINUS;
399 vga_to_curses[0xf2] = ACS_GEQUAL;
400 vga_to_curses[0xf3] = ACS_LEQUAL;
401 vga_to_curses[0xf8] = ACS_DEGREE;
402 vga_to_curses[0xfe] = ACS_BULLET;
403 }
404
405 static void curses_keyboard_setup(void)
406 {
407 #if defined(__APPLE__)
408 /* always use generic keymaps */
409 if (!keyboard_layout)
410 keyboard_layout = "en-us";
411 #endif
412 if(keyboard_layout) {
413 kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
414 if (!kbd_layout)
415 exit(1);
416 }
417 }
418
419 static const DisplayChangeListenerOps dcl_ops = {
420 .dpy_name = "curses",
421 .dpy_text_update = curses_update,
422 .dpy_text_resize = curses_resize,
423 .dpy_refresh = curses_refresh,
424 .dpy_text_cursor = curses_cursor_position,
425 };
426
427 void curses_display_init(DisplayState *ds, int full_screen)
428 {
429 #ifndef _WIN32
430 if (!isatty(1)) {
431 fprintf(stderr, "We need a terminal output\n");
432 exit(1);
433 }
434 #endif
435
436 curses_setup();
437 curses_keyboard_setup();
438 atexit(curses_atexit);
439
440 curses_winch_init();
441
442 dcl = g_new0(DisplayChangeListener, 1);
443 dcl->ops = &dcl_ops;
444 register_displaychangelistener(dcl);
445
446 invalidate = 1;
447 }