/[gxemul]/upstream/20070918/src/emul_parse.c
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Contents of /upstream/20070918/src/emul_parse.c

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Revision 45 - (show annotations)
Mon Oct 8 16:23:07 2007 UTC (16 years, 7 months ago) by dpavlin
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File size: 20166 byte(s)
20070918
1 /*
2 * Copyright (C) 2005-2007 Anders Gavare. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 *
28 * $Id: emul_parse.c,v 1.46 2007/06/15 17:02:38 debug Exp $
29 *
30 * Set up an emulation by parsing a config file.
31 *
32 * TODO: REWRITE THIS FROM SCRATCH! :-)
33 */
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "diskimage.h"
40 #include "emul.h"
41 #include "machine.h"
42 #include "misc.h"
43 #include "net.h"
44
45
46 #define is_word_char(ch) ( \
47 (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || \
48 ch == '_' || ch == '$' || (ch >= '0' && ch <= '9') )
49
50 #define MAX_WORD_LEN 200
51
52 #define EXPECT_WORD 1
53 #define EXPECT_LEFT_PARENTHESIS 2
54 #define EXPECT_RIGHT_PARENTHESIS 4
55
56 static int parenthesis_level = 0;
57
58
59 /*
60 * read_one_word():
61 *
62 * Reads the file f until it has read a complete word. Whitespace is ignored,
63 * and also any exclamation mark ('!') and anything following an exclamation
64 * mark on a line.
65 *
66 * Used internally by emul_parse_config().
67 */
68 static void read_one_word(FILE *f, char *buf, int buflen, int *line,
69 int expect)
70 {
71 int ch;
72 int done = 0;
73 int curlen = 0;
74 int in_word = 0;
75
76 while (!done) {
77 if (curlen >= buflen - 1)
78 break;
79
80 ch = fgetc(f);
81 if (ch == EOF)
82 break;
83
84 if (in_word) {
85 if (is_word_char(ch)) {
86 buf[curlen++] = ch;
87 if (curlen == buflen - 1)
88 done = 1;
89 continue;
90 } else {
91 if (ungetc(ch, f) == EOF) {
92 fatal("ungetc() failed?\n");
93 exit(1);
94 }
95 break;
96 }
97 }
98
99 if (ch == '\n') {
100 (*line) ++;
101 continue;
102 }
103
104 if (ch == '\r')
105 continue;
106
107 if (ch == '!') {
108 /* Skip until newline: */
109 while (ch != '\n' && ch != EOF)
110 ch = fgetc(f);
111 if (ch == '\n')
112 (*line) ++;
113 continue;
114 }
115
116 if (ch == '{') {
117 int depth = 1;
118
119 /* Skip until '}': */
120 while (depth > 0) {
121 ch = fgetc(f);
122 if (ch == '\n')
123 (*line) ++;
124 if (ch == '{')
125 depth ++;
126 if (ch == '}')
127 depth --;
128 if (ch == EOF) {
129 fatal("line %i: unexpected EOF inside"
130 " a nested comment\n", *line);
131 exit(1);
132 }
133 }
134 continue;
135 }
136
137 /* Whitespace? */
138 if (ch <= ' ')
139 continue;
140
141 if (ch == '"' || ch == '\'') {
142 /* This is a quoted word. */
143 int start_ch = ch;
144
145 if (expect & EXPECT_LEFT_PARENTHESIS) {
146 fatal("unexpected character '%c', line %i\n",
147 ch, *line);
148 exit(1);
149 }
150
151 while (curlen < buflen - 1) {
152 ch = fgetc(f);
153 if (ch == '\n') {
154 fatal("line %i: newline inside"
155 " quotes?\n", *line);
156 exit(1);
157 }
158 if (ch == EOF) {
159 fatal("line %i: EOF inside a quoted"
160 " string?\n", *line);
161 exit(1);
162 }
163 if (ch == start_ch)
164 break;
165 buf[curlen++] = ch;
166 }
167 break;
168 }
169
170 if ((expect & EXPECT_WORD) && is_word_char(ch)) {
171 buf[curlen++] = ch;
172 in_word = 1;
173 if (curlen == buflen - 1)
174 done = 1;
175 } else {
176 if ((expect & EXPECT_LEFT_PARENTHESIS) && ch == '(') {
177 parenthesis_level ++;
178 buf[curlen++] = ch;
179 break;
180 }
181 if ((expect & EXPECT_RIGHT_PARENTHESIS) && ch == ')') {
182 parenthesis_level --;
183 buf[curlen++] = ch;
184 break;
185 }
186
187 fatal("unexpected character '%c', line %i\n",
188 ch, *line);
189 exit(1);
190 }
191 }
192
193 buf[curlen] = '\0';
194 }
195
196
197 #define PARSESTATE_NONE 0
198 #define PARSESTATE_EMUL 1
199 #define PARSESTATE_NET 2
200 #define PARSESTATE_MACHINE 3
201
202 static char cur_net_ipv4net[50];
203 static char cur_net_ipv4len[50];
204 static char cur_net_local_port[10];
205 #define MAX_N_REMOTE 20
206 #define MAX_REMOTE_LEN 100
207 static char *cur_net_remote[MAX_N_REMOTE];
208 static int cur_net_n_remote;
209
210 static char cur_machine_name[50];
211 static char cur_machine_cpu[50];
212 static char cur_machine_type[50];
213 static char cur_machine_subtype[50];
214 static char cur_machine_bootname[150];
215 static char cur_machine_bootarg[250];
216 static char cur_machine_slowsi[10];
217 static char cur_machine_prom_emulation[10];
218 static char cur_machine_use_x11[10];
219 static char cur_machine_x11_scaledown[10];
220 static char cur_machine_byte_order[20];
221 static char cur_machine_random_mem[10];
222 static char cur_machine_random_cpu[10];
223 static char cur_machine_force_netboot[10];
224 static char cur_machine_start_paused[10];
225 static char cur_machine_ncpus[10];
226 static char cur_machine_n_gfx_cards[10];
227 static char cur_machine_serial_nr[10];
228 static char cur_machine_emulated_hz[10];
229 static char cur_machine_memory[10];
230 #define MAX_N_LOAD 15
231 #define MAX_LOAD_LEN 2000
232 static char *cur_machine_load[MAX_N_LOAD];
233 static int cur_machine_n_load;
234 #define MAX_N_DISK 10
235 #define MAX_DISK_LEN 2000
236 static char *cur_machine_disk[MAX_N_DISK];
237 static int cur_machine_n_disk;
238 #define MAX_N_DEVICE 20
239 #define MAX_DEVICE_LEN 400
240 static char *cur_machine_device[MAX_N_DISK];
241 static int cur_machine_n_device;
242 #define MAX_N_X11_DISP 5
243 #define MAX_X11_DISP_LEN 1000
244 static char *cur_machine_x11_disp[MAX_N_X11_DISP];
245 static int cur_machine_n_x11_disp;
246
247 #define WORD(w,var) { \
248 if (strcmp(word, w) == 0) { \
249 read_one_word(f, word, maxbuflen, \
250 line, EXPECT_LEFT_PARENTHESIS); \
251 read_one_word(f, var, sizeof(var), \
252 line, EXPECT_WORD); \
253 read_one_word(f, word, maxbuflen, \
254 line, EXPECT_RIGHT_PARENTHESIS); \
255 return; \
256 } \
257 }
258
259 static void parse__machine(struct emul *e, FILE *f, int *in_emul, int *line,
260 int *parsestate, char *word, size_t maxbuflen);
261
262
263 /*
264 * parse_on_off():
265 *
266 * Returns 1 for "on", "yes", "enable", or "1".
267 * Returns 0 for "off", "no", "disable", or "0".
268 * Prints a fatal warning and exit()s for other values.
269 */
270 int parse_on_off(char *s)
271 {
272 if (strcasecmp(s, "on") == 0 || strcasecmp(s, "yes") == 0 ||
273 strcasecmp(s, "enable") == 0 || strcasecmp(s, "1") == 0)
274 return 1;
275 if (strcasecmp(s, "off") == 0 || strcasecmp(s, "no") == 0 ||
276 strcasecmp(s, "disable") == 0 || strcasecmp(s, "0") == 0)
277 return 0;
278
279 fprintf(stderr, "parse_on_off(): WARNING: unknown value '%s'\n", s);
280
281 return 0;
282 }
283
284
285 /*
286 * parse__emul():
287 *
288 * name, net, machine
289 */
290 static void parse__emul(struct emul *e, FILE *f, int *in_emul, int *line,
291 int *parsestate, char *word, size_t maxbuflen)
292 {
293 if (word[0] == ')') {
294 *parsestate = PARSESTATE_NONE;
295 return;
296 }
297
298 if (strcmp(word, "name") == 0) {
299 char tmp[200];
300 read_one_word(f, word, maxbuflen,
301 line, EXPECT_LEFT_PARENTHESIS);
302 read_one_word(f, tmp, sizeof(tmp), line, EXPECT_WORD);
303 read_one_word(f, word, maxbuflen,
304 line, EXPECT_RIGHT_PARENTHESIS);
305 if (e->name != NULL) {
306 free(e->name);
307 e->name = NULL;
308 }
309 CHECK_ALLOCATION(e->name = strdup(tmp));
310 debug("name: \"%s\"\n", e->name);
311 return;
312 }
313
314 if (strcmp(word, "net") == 0) {
315 *parsestate = PARSESTATE_NET;
316 read_one_word(f, word, maxbuflen,
317 line, EXPECT_LEFT_PARENTHESIS);
318
319 /* Default net: */
320 strlcpy(cur_net_ipv4net, NET_DEFAULT_IPV4_MASK,
321 sizeof(cur_net_ipv4net));
322 snprintf(cur_net_ipv4len, sizeof(cur_net_ipv4len), "%i",
323 NET_DEFAULT_IPV4_LEN);
324 strlcpy(cur_net_local_port, "", sizeof(cur_net_local_port));
325 cur_net_n_remote = 0;
326 return;
327 }
328
329 if (strcmp(word, "machine") == 0) {
330 *parsestate = PARSESTATE_MACHINE;
331 read_one_word(f, word, maxbuflen,
332 line, EXPECT_LEFT_PARENTHESIS);
333
334 /* A "zero state": */
335 cur_machine_name[0] = '\0';
336 cur_machine_cpu[0] = '\0';
337 cur_machine_type[0] = '\0';
338 cur_machine_subtype[0] = '\0';
339 cur_machine_bootname[0] = '\0';
340 cur_machine_bootarg[0] = '\0';
341 cur_machine_n_load = 0;
342 cur_machine_n_disk = 0;
343 cur_machine_n_device = 0;
344 cur_machine_n_x11_disp = 0;
345 cur_machine_slowsi[0] = '\0';
346 cur_machine_prom_emulation[0] = '\0';
347 cur_machine_use_x11[0] = '\0';
348 cur_machine_x11_scaledown[0] = '\0';
349 cur_machine_byte_order[0] = '\0';
350 cur_machine_random_mem[0] = '\0';
351 cur_machine_random_cpu[0] = '\0';
352 cur_machine_force_netboot[0] = '\0';
353 cur_machine_start_paused[0] = '\0';
354 cur_machine_ncpus[0] = '\0';
355 cur_machine_n_gfx_cards[0] = '\0';
356 cur_machine_serial_nr[0] = '\0';
357 cur_machine_emulated_hz[0] = '\0';
358 cur_machine_memory[0] = '\0';
359 return;
360 }
361
362 fatal("line %i: not expecting '%s' in an 'emul' section\n",
363 *line, word);
364 exit(1);
365 }
366
367
368 /*
369 * parse__net():
370 *
371 * Simple words: ipv4net, ipv4len, local_port
372 *
373 * Complex: add_remote
374 *
375 * TODO: more words? for example an option to disable the gateway? that would
376 * have to be implemented correctly in src/net.c first.
377 */
378 static void parse__net(struct emul *e, FILE *f, int *in_emul, int *line,
379 int *parsestate, char *word, size_t maxbuflen)
380 {
381 int i;
382
383 if (word[0] == ')') {
384 /* Finished with the 'net' section. Let's create the net: */
385 if (e->net != NULL) {
386 fatal("line %i: more than one net isn't really "
387 "supported yet\n", *line);
388 exit(1);
389 }
390
391 if (!cur_net_local_port[0])
392 strlcpy(cur_net_local_port, "0",
393 sizeof(cur_net_local_port));
394
395 e->net = net_init(e, NET_INIT_FLAG_GATEWAY,
396 cur_net_ipv4net, atoi(cur_net_ipv4len),
397 cur_net_remote, cur_net_n_remote,
398 atoi(cur_net_local_port), NULL);
399
400 if (e->net == NULL) {
401 fatal("line %i: fatal error: could not create"
402 " the net (?)\n", *line);
403 exit(1);
404 }
405
406 for (i=0; i<cur_net_n_remote; i++) {
407 free(cur_net_remote[i]);
408 cur_net_remote[i] = NULL;
409 }
410
411 *parsestate = PARSESTATE_EMUL;
412 return;
413 }
414
415 WORD("ipv4net", cur_net_ipv4net);
416 WORD("ipv4len", cur_net_ipv4len);
417 WORD("local_port", cur_net_local_port);
418
419 if (strcmp(word, "add_remote") == 0) {
420 read_one_word(f, word, maxbuflen,
421 line, EXPECT_LEFT_PARENTHESIS);
422 if (cur_net_n_remote >= MAX_N_REMOTE) {
423 fprintf(stderr, "too many remote networks\n");
424 exit(1);
425 }
426
427 CHECK_ALLOCATION(cur_net_remote[cur_net_n_remote] =
428 malloc(MAX_REMOTE_LEN));
429 read_one_word(f, cur_net_remote[cur_net_n_remote],
430 MAX_REMOTE_LEN, line, EXPECT_WORD);
431 cur_net_n_remote ++;
432 read_one_word(f, word, maxbuflen, line,
433 EXPECT_RIGHT_PARENTHESIS);
434 return;
435 }
436
437 fatal("line %i: not expecting '%s' in a 'net' section\n", *line, word);
438 exit(1);
439 }
440
441
442 /*
443 * parse__machine():
444 */
445 static void parse__machine(struct emul *e, FILE *f, int *in_emul, int *line,
446 int *parsestate, char *word, size_t maxbuflen)
447 {
448 int r, i;
449
450 if (word[0] == ')') {
451 /* Finished with the 'machine' section. */
452 struct machine *m;
453
454 if (!cur_machine_name[0])
455 strlcpy(cur_machine_name, "no_name",
456 sizeof(cur_machine_name));
457
458 m = emul_add_machine(e, cur_machine_name);
459
460 r = machine_name_to_type(cur_machine_type, cur_machine_subtype,
461 &m->machine_type, &m->machine_subtype, &m->arch);
462 if (!r)
463 exit(1);
464
465 if (cur_machine_cpu[0])
466 CHECK_ALLOCATION(m->cpu_name = strdup(cur_machine_cpu));
467
468 if (!cur_machine_use_x11[0])
469 strlcpy(cur_machine_use_x11, "no",
470 sizeof(cur_machine_use_x11));
471 m->x11_md.in_use = parse_on_off(cur_machine_use_x11);
472
473 if (!cur_machine_slowsi[0])
474 strlcpy(cur_machine_slowsi, "no",
475 sizeof(cur_machine_slowsi));
476 m->slow_serial_interrupts_hack_for_linux =
477 parse_on_off(cur_machine_slowsi);
478
479 if (!cur_machine_prom_emulation[0])
480 strlcpy(cur_machine_prom_emulation, "yes",
481 sizeof(cur_machine_prom_emulation));
482 m->prom_emulation = parse_on_off(cur_machine_prom_emulation);
483
484 if (!cur_machine_random_mem[0])
485 strlcpy(cur_machine_random_mem, "no",
486 sizeof(cur_machine_random_mem));
487 m->random_mem_contents =
488 parse_on_off(cur_machine_random_mem);
489
490 if (!cur_machine_random_cpu[0])
491 strlcpy(cur_machine_random_cpu, "no",
492 sizeof(cur_machine_random_cpu));
493 m->use_random_bootstrap_cpu =
494 parse_on_off(cur_machine_random_cpu);
495
496 m->byte_order_override = NO_BYTE_ORDER_OVERRIDE;
497 if (cur_machine_byte_order[0]) {
498 if (strncasecmp(cur_machine_byte_order, "big", 3) == 0)
499 m->byte_order_override = EMUL_BIG_ENDIAN;
500 else if (strncasecmp(cur_machine_byte_order, "little",
501 6) == 0)
502 m->byte_order_override = EMUL_LITTLE_ENDIAN;
503 else {
504 fatal("Byte order must be big-endian or"
505 " little-endian\n");
506 exit(1);
507 }
508 }
509
510 if (!cur_machine_force_netboot[0])
511 strlcpy(cur_machine_force_netboot, "no",
512 sizeof(cur_machine_force_netboot));
513 m->force_netboot = parse_on_off(cur_machine_force_netboot);
514
515 if (!cur_machine_start_paused[0])
516 strlcpy(cur_machine_start_paused, "no",
517 sizeof(cur_machine_start_paused));
518 m->start_paused = parse_on_off(cur_machine_start_paused);
519
520 /* NOTE: Default nr of CPUs is 0: */
521 if (!cur_machine_ncpus[0])
522 strlcpy(cur_machine_ncpus, "0",
523 sizeof(cur_machine_ncpus));
524 m->ncpus = atoi(cur_machine_ncpus);
525
526 if (cur_machine_n_gfx_cards[0])
527 m->n_gfx_cards = atoi(cur_machine_n_gfx_cards);
528
529 if (cur_machine_serial_nr[0]) {
530 m->serial_nr = atoi(cur_machine_serial_nr);
531 e->next_serial_nr = m->serial_nr+1;
532 }
533
534 if (cur_machine_emulated_hz[0]) {
535 m->emulated_hz = mystrtoull(cur_machine_emulated_hz,
536 NULL, 0);
537 }
538
539 /* NOTE: Default nr of CPUs is 0: */
540 if (!cur_machine_memory[0])
541 strlcpy(cur_machine_memory, "0",
542 sizeof(cur_machine_memory));
543 m->physical_ram_in_mb = atoi(cur_machine_memory);
544
545 if (!cur_machine_x11_scaledown[0])
546 m->x11_md.scaledown = 1;
547 else {
548 m->x11_md.scaledown = atoi(cur_machine_x11_scaledown);
549 if (m->x11_md.scaledown < 0) {
550 m->x11_md.scaleup = 0 - m->x11_md.scaledown;
551 m->x11_md.scaledown = 1;
552 }
553 if (m->x11_md.scaledown < 1) {
554 fprintf(stderr, "Invalid scaledown value"
555 " (%i)\n", m->x11_md.scaledown);
556 exit(1);
557 }
558 }
559
560 for (i=0; i<cur_machine_n_disk; i++) {
561 diskimage_add(m, cur_machine_disk[i]);
562 free(cur_machine_disk[i]);
563 cur_machine_disk[i] = NULL;
564 }
565
566 m->boot_kernel_filename = strdup(cur_machine_bootname);
567
568 if (cur_machine_bootarg[0])
569 m->boot_string_argument = strdup(cur_machine_bootarg);
570
571 for (i=0; i<cur_machine_n_x11_disp; i++) {
572 m->x11_md.n_display_names ++;
573 CHECK_ALLOCATION(m->x11_md.display_names = realloc(
574 m->x11_md.display_names, m->x11_md.n_display_names
575 * sizeof(char *)));
576 CHECK_ALLOCATION(m->x11_md.display_names[
577 m->x11_md.n_display_names-1] =
578 strdup(cur_machine_x11_disp[i]));
579 free(cur_machine_x11_disp[i]);
580 cur_machine_x11_disp[i] = NULL;
581 }
582
583 emul_machine_setup(m,
584 cur_machine_n_load, cur_machine_load,
585 cur_machine_n_device, cur_machine_device);
586
587 for (i=0; i<cur_machine_n_device; i++) {
588 free(cur_machine_device[i]);
589 cur_machine_device[i] = NULL;
590 }
591
592 for (i=0; i<cur_machine_n_load; i++) {
593 free(cur_machine_load[i]);
594 cur_machine_load[i] = NULL;
595 }
596
597 *parsestate = PARSESTATE_EMUL;
598 return;
599 }
600
601 WORD("name", cur_machine_name);
602 WORD("cpu", cur_machine_cpu);
603 WORD("type", cur_machine_type);
604 WORD("subtype", cur_machine_subtype);
605 WORD("bootname", cur_machine_bootname);
606 WORD("bootarg", cur_machine_bootarg);
607 WORD("slow_serial_interrupts_hack_for_linux", cur_machine_slowsi);
608 WORD("prom_emulation", cur_machine_prom_emulation);
609 WORD("use_x11", cur_machine_use_x11);
610 WORD("x11_scaledown", cur_machine_x11_scaledown);
611 WORD("byte_order", cur_machine_byte_order);
612 WORD("random_mem_contents", cur_machine_random_mem);
613 WORD("use_random_bootstrap_cpu", cur_machine_random_cpu);
614 WORD("force_netboot", cur_machine_force_netboot);
615 WORD("ncpus", cur_machine_ncpus);
616 WORD("serial_nr", cur_machine_serial_nr);
617 WORD("n_gfx_cards", cur_machine_n_gfx_cards);
618 WORD("emulated_hz", cur_machine_emulated_hz);
619 WORD("memory", cur_machine_memory);
620 WORD("start_paused", cur_machine_start_paused);
621
622 if (strcmp(word, "load") == 0) {
623 read_one_word(f, word, maxbuflen,
624 line, EXPECT_LEFT_PARENTHESIS);
625 if (cur_machine_n_load >= MAX_N_LOAD) {
626 fprintf(stderr, "too many loads\n");
627 exit(1);
628 }
629 CHECK_ALLOCATION(cur_machine_load[cur_machine_n_load] =
630 malloc(MAX_LOAD_LEN));
631 read_one_word(f, cur_machine_load[cur_machine_n_load],
632 MAX_LOAD_LEN, line, EXPECT_WORD);
633 cur_machine_n_load ++;
634 read_one_word(f, word, maxbuflen,
635 line, EXPECT_RIGHT_PARENTHESIS);
636 return;
637 }
638
639 if (strcmp(word, "disk") == 0) {
640 read_one_word(f, word, maxbuflen,
641 line, EXPECT_LEFT_PARENTHESIS);
642 if (cur_machine_n_disk >= MAX_N_DISK) {
643 fprintf(stderr, "too many disks\n");
644 exit(1);
645 }
646 CHECK_ALLOCATION(cur_machine_disk[cur_machine_n_disk] =
647 malloc(MAX_DISK_LEN));
648 read_one_word(f, cur_machine_disk[cur_machine_n_disk],
649 MAX_DISK_LEN, line, EXPECT_WORD);
650 cur_machine_n_disk ++;
651 read_one_word(f, word, maxbuflen,
652 line, EXPECT_RIGHT_PARENTHESIS);
653 return;
654 }
655
656 if (strcmp(word, "device") == 0) {
657 read_one_word(f, word, maxbuflen,
658 line, EXPECT_LEFT_PARENTHESIS);
659 if (cur_machine_n_device >= MAX_N_DEVICE) {
660 fprintf(stderr, "too many devices\n");
661 exit(1);
662 }
663 CHECK_ALLOCATION(cur_machine_device[cur_machine_n_device] =
664 malloc(MAX_DEVICE_LEN));
665 read_one_word(f, cur_machine_device[cur_machine_n_device],
666 MAX_DEVICE_LEN, line, EXPECT_WORD);
667 cur_machine_n_device ++;
668 read_one_word(f, word, maxbuflen,
669 line, EXPECT_RIGHT_PARENTHESIS);
670 return;
671 }
672
673 if (strcmp(word, "add_x11_display") == 0) {
674 read_one_word(f, word, maxbuflen,
675 line, EXPECT_LEFT_PARENTHESIS);
676 if (cur_machine_n_x11_disp >= MAX_N_X11_DISP) {
677 fprintf(stderr, "too many x11 displays\n");
678 exit(1);
679 }
680 CHECK_ALLOCATION(cur_machine_x11_disp[cur_machine_n_x11_disp] =
681 malloc(MAX_X11_DISP_LEN));
682 read_one_word(f, cur_machine_x11_disp[cur_machine_n_x11_disp],
683 MAX_X11_DISP_LEN, line, EXPECT_WORD);
684 cur_machine_n_x11_disp ++;
685 read_one_word(f, word, maxbuflen,
686 line, EXPECT_RIGHT_PARENTHESIS);
687 return;
688 }
689
690 fatal("line %i: not expecting '%s' in a 'machine' section\n",
691 *line, word);
692 exit(1);
693 }
694
695
696 /*
697 * emul_parse_config():
698 *
699 * Set up an emulation by parsing a config file.
700 */
701 void emul_parse_config(struct emul *e, char *fname)
702 {
703 FILE *f = fopen(fname, "r");
704 char word[MAX_WORD_LEN];
705 int in_emul = 0;
706 int line = 1;
707 int parsestate = PARSESTATE_EMUL;
708
709 /* debug("emul_parse_config()\n"); */
710 if (f == NULL) {
711 perror(fname);
712 exit(1);
713 }
714
715 while (!feof(f)) {
716 read_one_word(f, word, sizeof(word), &line,
717 EXPECT_WORD | EXPECT_RIGHT_PARENTHESIS);
718 if (!word[0])
719 break;
720
721 /* debug("word = '%s'\n", word); */
722
723 switch (parsestate) {
724 case PARSESTATE_EMUL:
725 parse__emul(e, f, &in_emul, &line, &parsestate,
726 word, sizeof(word));
727 break;
728 case PARSESTATE_NET:
729 parse__net(e, f, &in_emul, &line, &parsestate,
730 word, sizeof(word));
731 break;
732 case PARSESTATE_MACHINE:
733 parse__machine(e, f, &in_emul, &line, &parsestate,
734 word, sizeof(word));
735 break;
736 case PARSESTATE_NONE:
737 break;
738 default:
739 fatal("INTERNAL ERROR in emul_parse.c ("
740 "parsestate %i is not imlemented yet?)\n",
741 parsestate);
742 exit(1);
743 }
744 }
745
746 if (parenthesis_level != 0) {
747 fatal("EOF but not enough right parentheses?\n");
748 exit(1);
749 }
750
751 fclose(f);
752 }
753

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