1 /*-
2 * Copyright (c) 2014 Pedro Souza <[email protected]>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32
33 #include "lua.h"
34 #include "lauxlib.h"
35 #include "lstd.h"
36 #include "lutils.h"
37 #include "bootstrap.h"
38 #include <gfx_fb.h>
39 #include <pnglite.h>
40
41 /*
42 * Like loader.perform, except args are passed already parsed
43 * on the stack.
44 */
45 static int
lua_command(lua_State * L)46 lua_command(lua_State *L)
47 {
48 int i;
49 int res = 1;
50 int argc = lua_gettop(L);
51 char **argv;
52
53 argv = malloc(sizeof(char *) * (argc + 1));
54 if (argv == NULL)
55 return 0;
56 for (i = 0; i < argc; i++)
57 argv[i] = (char *)(intptr_t)luaL_checkstring(L, i + 1);
58 argv[argc] = NULL;
59 res = interp_builtin_cmd(argc, argv);
60 free(argv);
61 lua_pushinteger(L, res);
62
63 return 1;
64 }
65
66 static int
lua_perform(lua_State * L)67 lua_perform(lua_State *L)
68 {
69 int argc;
70 char **argv;
71 int res = 1;
72
73 if (parse(&argc, &argv, luaL_checkstring(L, 1)) == 0) {
74 res = interp_builtin_cmd(argc, argv);
75 free(argv);
76 }
77 lua_pushinteger(L, res);
78
79 return 1;
80 }
81
82 static int
lua_command_error(lua_State * L)83 lua_command_error(lua_State *L)
84 {
85
86 lua_pushstring(L, command_errbuf);
87 return 1;
88 }
89
90 /*
91 * Accepts a space-delimited loader command and runs it through the standard
92 * loader parsing, as if it were executed at the loader prompt by the user.
93 */
94 static int
lua_interpret(lua_State * L)95 lua_interpret(lua_State *L)
96 {
97 const char *interp_string;
98
99 if (lua_gettop(L) != 1) {
100 lua_pushnil(L);
101 return 1;
102 }
103
104 interp_string = luaL_checkstring(L, 1);
105 lua_pushinteger(L, interp_run(interp_string));
106 return 1;
107 }
108
109 static int
lua_parse(lua_State * L)110 lua_parse(lua_State *L)
111 {
112 int argc, nargc;
113 char **argv;
114
115 if (parse(&argc, &argv, luaL_checkstring(L, 1)) == 0) {
116 for (nargc = 0; nargc < argc; ++nargc) {
117 lua_pushstring(L, argv[nargc]);
118 }
119 free(argv);
120 return nargc;
121 }
122
123 lua_pushnil(L);
124 return 1;
125 }
126
127 static int
lua_getchar(lua_State * L)128 lua_getchar(lua_State *L)
129 {
130
131 lua_pushinteger(L, getchar());
132 return 1;
133 }
134
135 static int
lua_ischar(lua_State * L)136 lua_ischar(lua_State *L)
137 {
138
139 lua_pushboolean(L, ischar());
140 return 1;
141 }
142
143 static int
lua_gets(lua_State * L)144 lua_gets(lua_State *L)
145 {
146 char buf[129];
147
148 ngets(buf, 128);
149 lua_pushstring(L, buf);
150 return 1;
151 }
152
153 static int
lua_time(lua_State * L)154 lua_time(lua_State *L)
155 {
156
157 lua_pushinteger(L, time(NULL));
158 return 1;
159 }
160
161 static int
lua_delay(lua_State * L)162 lua_delay(lua_State *L)
163 {
164
165 delay((int)luaL_checknumber(L, 1));
166 return 0;
167 }
168
169 static int
lua_getenv(lua_State * L)170 lua_getenv(lua_State *L)
171 {
172 lua_pushstring(L, getenv(luaL_checkstring(L, 1)));
173
174 return 1;
175 }
176
177 static int
lua_setenv(lua_State * L)178 lua_setenv(lua_State *L)
179 {
180 const char *key, *val;
181
182 key = luaL_checkstring(L, 1);
183 val = luaL_checkstring(L, 2);
184 lua_pushinteger(L, setenv(key, val, 1));
185
186 return 1;
187 }
188
189 static int
lua_unsetenv(lua_State * L)190 lua_unsetenv(lua_State *L)
191 {
192 const char *ev;
193
194 ev = luaL_checkstring(L, 1);
195 lua_pushinteger(L, unsetenv(ev));
196
197 return 1;
198 }
199
200 static int
lua_printc(lua_State * L)201 lua_printc(lua_State *L)
202 {
203 ssize_t cur, l;
204 const char *s = luaL_checklstring(L, 1, &l);
205
206 for (cur = 0; cur < l; ++cur)
207 putchar((unsigned char)*(s++));
208
209 return 1;
210 }
211
212 static int
lua_openfile(lua_State * L)213 lua_openfile(lua_State *L)
214 {
215 const char *mode, *str;
216 int nargs;
217
218 nargs = lua_gettop(L);
219 if (nargs < 1 || nargs > 2) {
220 lua_pushnil(L);
221 return 1;
222 }
223 str = lua_tostring(L, 1);
224 mode = "r";
225 if (nargs > 1) {
226 mode = lua_tostring(L, 2);
227 if (mode == NULL) {
228 lua_pushnil(L);
229 return 1;
230 }
231 }
232 FILE * f = fopen(str, mode);
233 if (f != NULL) {
234 FILE ** ptr = (FILE**)lua_newuserdata(L, sizeof(FILE**));
235 *ptr = f;
236 } else
237 lua_pushnil(L);
238 return 1;
239 }
240
241 static int
lua_closefile(lua_State * L)242 lua_closefile(lua_State *L)
243 {
244 FILE ** f;
245 if (lua_gettop(L) != 1) {
246 lua_pushboolean(L, 0);
247 return 1;
248 }
249
250 f = (FILE**)lua_touserdata(L, 1);
251 if (f != NULL && *f != NULL) {
252 lua_pushboolean(L, fclose(*f) == 0 ? 1 : 0);
253 *f = NULL;
254 } else
255 lua_pushboolean(L, 0);
256
257 return 1;
258 }
259
260 static int
lua_readfile(lua_State * L)261 lua_readfile(lua_State *L)
262 {
263 FILE **f;
264 size_t size, r;
265 char * buf;
266
267 if (lua_gettop(L) < 1 || lua_gettop(L) > 2) {
268 lua_pushnil(L);
269 lua_pushinteger(L, 0);
270 return 2;
271 }
272
273 f = (FILE**)lua_touserdata(L, 1);
274
275 if (f == NULL || *f == NULL) {
276 lua_pushnil(L);
277 lua_pushinteger(L, 0);
278 return 2;
279 }
280
281 if (lua_gettop(L) == 2)
282 size = (size_t)lua_tonumber(L, 2);
283 else
284 size = (*f)->size;
285
286
287 buf = (char*)malloc(size);
288 r = fread(buf, 1, size, *f);
289 lua_pushlstring(L, buf, r);
290 free(buf);
291 lua_pushinteger(L, r);
292
293 return 2;
294 }
295
296 /*
297 * Implements io.write(file, ...)
298 * Any number of string and number arguments may be passed to it,
299 * and it will return the number of bytes written, or nil, an error string, and
300 * the errno.
301 */
302 static int
lua_writefile(lua_State * L)303 lua_writefile(lua_State *L)
304 {
305 FILE **f;
306 const char *buf;
307 int i, nargs;
308 size_t bufsz, w, wrsz;
309
310 buf = NULL;
311 bufsz = 0;
312 w = 0;
313 wrsz = 0;
314 nargs = lua_gettop(L);
315 if (nargs < 2) {
316 errno = EINVAL;
317 return luaL_fileresult(L, 0, NULL);
318 }
319
320 f = (FILE**)lua_touserdata(L, 1);
321
322 if (f == NULL || *f == NULL) {
323 errno = EINVAL;
324 return luaL_fileresult(L, 0, NULL);
325 }
326
327 /* Do a validation pass first */
328 for (i = 0; i < nargs - 1; i++) {
329 /*
330 * With Lua's API, lua_isstring really checks if the argument
331 * is a string or a number. The latter will be implicitly
332 * converted to a string by our later call to lua_tolstring.
333 */
334 if (!lua_isstring(L, i + 2)) {
335 errno = EINVAL;
336 return luaL_fileresult(L, 0, NULL);
337 }
338 }
339 for (i = 0; i < nargs - 1; i++) {
340 /* We've already validated; there's no chance of failure */
341 buf = lua_tolstring(L, i + 2, &bufsz);
342 wrsz = fwrite(buf, 1, bufsz, *f);
343 if (wrsz < bufsz)
344 return luaL_fileresult(L, 0, NULL);
345 w += wrsz;
346 }
347 lua_pushinteger(L, w);
348 return 1;
349 }
350
351 /*
352 * put image using terminal coordinates.
353 */
354 static int
lua_term_putimage(lua_State * L)355 lua_term_putimage(lua_State *L)
356 {
357 const char *name;
358 png_t png;
359 uint32_t x1, y1, x2, y2, f;
360 int nargs, ret = 0, error;
361
362 nargs = lua_gettop(L);
363 if (nargs != 6) {
364 lua_pushboolean(L, 0);
365 return 1;
366 }
367
368 name = luaL_checkstring(L, 1);
369 x1 = luaL_checknumber(L, 2);
370 y1 = luaL_checknumber(L, 3);
371 x2 = luaL_checknumber(L, 4);
372 y2 = luaL_checknumber(L, 5);
373 f = luaL_checknumber(L, 6);
374
375 x1 = gfx_state.tg_origin.tp_col + x1 * gfx_state.tg_font.vf_width;
376 y1 = gfx_state.tg_origin.tp_row + y1 * gfx_state.tg_font.vf_height;
377 if (x2 != 0) {
378 x2 = gfx_state.tg_origin.tp_col +
379 x2 * gfx_state.tg_font.vf_width;
380 }
381 if (y2 != 0) {
382 y2 = gfx_state.tg_origin.tp_row +
383 y2 * gfx_state.tg_font.vf_height;
384 }
385
386 if ((error = png_open(&png, name)) != PNG_NO_ERROR) {
387 if (f & FL_PUTIMAGE_DEBUG)
388 printf("%s\n", png_error_string(error));
389 } else {
390 if (gfx_fb_putimage(&png, x1, y1, x2, y2, f) == 0)
391 ret = 1;
392 (void) png_close(&png);
393 }
394 lua_pushboolean(L, ret);
395 return 1;
396 }
397
398 static int
lua_fb_putimage(lua_State * L)399 lua_fb_putimage(lua_State *L)
400 {
401 const char *name;
402 png_t png;
403 uint32_t x1, y1, x2, y2, f;
404 int nargs, ret = 0, error;
405
406 nargs = lua_gettop(L);
407 if (nargs != 6) {
408 lua_pushboolean(L, 0);
409 return 1;
410 }
411
412 name = luaL_checkstring(L, 1);
413 x1 = luaL_checknumber(L, 2);
414 y1 = luaL_checknumber(L, 3);
415 x2 = luaL_checknumber(L, 4);
416 y2 = luaL_checknumber(L, 5);
417 f = luaL_checknumber(L, 6);
418
419 if ((error = png_open(&png, name)) != PNG_NO_ERROR) {
420 if (f & FL_PUTIMAGE_DEBUG)
421 printf("%s\n", png_error_string(error));
422 } else {
423 if (gfx_fb_putimage(&png, x1, y1, x2, y2, f) == 0)
424 ret = 1;
425 (void) png_close(&png);
426 }
427 lua_pushboolean(L, ret);
428 return 1;
429 }
430
431 static int
lua_fb_setpixel(lua_State * L)432 lua_fb_setpixel(lua_State *L)
433 {
434 uint32_t x, y;
435 int nargs;
436
437 nargs = lua_gettop(L);
438 if (nargs != 2) {
439 lua_pushnil(L);
440 return 1;
441 }
442
443 x = luaL_checknumber(L, 1);
444 y = luaL_checknumber(L, 2);
445 gfx_fb_setpixel(x, y);
446 return 0;
447 }
448
449 static int
lua_fb_line(lua_State * L)450 lua_fb_line(lua_State *L)
451 {
452 uint32_t x0, y0, x1, y1, wd;
453 int nargs;
454
455 nargs = lua_gettop(L);
456 if (nargs != 5) {
457 lua_pushnil(L);
458 return 1;
459 }
460
461 x0 = luaL_checknumber(L, 1);
462 y0 = luaL_checknumber(L, 2);
463 x1 = luaL_checknumber(L, 3);
464 y1 = luaL_checknumber(L, 4);
465 wd = luaL_checknumber(L, 5);
466 gfx_fb_line(x0, y0, x1, y1, wd);
467 return 0;
468 }
469
470 static int
lua_fb_bezier(lua_State * L)471 lua_fb_bezier(lua_State *L)
472 {
473 uint32_t x0, y0, x1, y1, x2, y2, width;
474 int nargs;
475
476 nargs = lua_gettop(L);
477 if (nargs != 7) {
478 lua_pushnil(L);
479 return 1;
480 }
481
482 x0 = luaL_checknumber(L, 1);
483 y0 = luaL_checknumber(L, 2);
484 x1 = luaL_checknumber(L, 3);
485 y1 = luaL_checknumber(L, 4);
486 x2 = luaL_checknumber(L, 5);
487 y2 = luaL_checknumber(L, 6);
488 width = luaL_checknumber(L, 7);
489 gfx_fb_bezier(x0, y0, x1, y1, x2, y2, width);
490 return 0;
491 }
492
493 static int
lua_fb_drawrect(lua_State * L)494 lua_fb_drawrect(lua_State *L)
495 {
496 uint32_t x0, y0, x1, y1, fill;
497 int nargs;
498
499 nargs = lua_gettop(L);
500 if (nargs != 5) {
501 lua_pushnil(L);
502 return 1;
503 }
504
505 x0 = luaL_checknumber(L, 1);
506 y0 = luaL_checknumber(L, 2);
507 x1 = luaL_checknumber(L, 3);
508 y1 = luaL_checknumber(L, 4);
509 fill = luaL_checknumber(L, 5);
510 gfx_fb_drawrect(x0, y0, x1, y1, fill);
511 return 0;
512 }
513
514 static int
lua_term_drawrect(lua_State * L)515 lua_term_drawrect(lua_State *L)
516 {
517 uint32_t x0, y0, x1, y1;
518 int nargs;
519
520 nargs = lua_gettop(L);
521 if (nargs != 4) {
522 lua_pushnil(L);
523 return 1;
524 }
525
526 x0 = luaL_checknumber(L, 1);
527 y0 = luaL_checknumber(L, 2);
528 x1 = luaL_checknumber(L, 3);
529 y1 = luaL_checknumber(L, 4);
530 gfx_term_drawrect(x0, y0, x1, y1);
531 return 0;
532 }
533
534 #define REG_SIMPLE(n) { #n, lua_ ## n }
535 static const struct luaL_Reg loaderlib[] = {
536 REG_SIMPLE(delay),
537 REG_SIMPLE(command_error),
538 REG_SIMPLE(command),
539 REG_SIMPLE(interpret),
540 REG_SIMPLE(parse),
541 REG_SIMPLE(getenv),
542 REG_SIMPLE(perform),
543 /* Also registered as the global 'printc' */
544 REG_SIMPLE(printc),
545 REG_SIMPLE(setenv),
546 REG_SIMPLE(time),
547 REG_SIMPLE(unsetenv),
548 REG_SIMPLE(fb_bezier),
549 REG_SIMPLE(fb_drawrect),
550 REG_SIMPLE(fb_line),
551 REG_SIMPLE(fb_putimage),
552 REG_SIMPLE(fb_setpixel),
553 REG_SIMPLE(term_drawrect),
554 REG_SIMPLE(term_putimage),
555 { NULL, NULL },
556 };
557
558 static const struct luaL_Reg iolib[] = {
559 { "close", lua_closefile },
560 REG_SIMPLE(getchar),
561 REG_SIMPLE(gets),
562 REG_SIMPLE(ischar),
563 { "open", lua_openfile },
564 { "read", lua_readfile },
565 { "write", lua_writefile },
566 { NULL, NULL },
567 };
568 #undef REG_SIMPLE
569
570 int
luaopen_loader(lua_State * L)571 luaopen_loader(lua_State *L)
572 {
573 luaL_newlib(L, loaderlib);
574 /* Add loader.machine and loader.machine_arch properties */
575 lua_pushstring(L, MACHINE);
576 lua_setfield(L, -2, "machine");
577 lua_pushstring(L, MACHINE_ARCH);
578 lua_setfield(L, -2, "machine_arch");
579 lua_pushstring(L, LUA_PATH);
580 lua_setfield(L, -2, "lua_path");
581 /* Set global printc to loader.printc */
582 lua_register(L, "printc", lua_printc);
583 return 1;
584 }
585
586 int
luaopen_io(lua_State * L)587 luaopen_io(lua_State *L)
588 {
589 luaL_newlib(L, iolib);
590 return 1;
591 }
592