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1/*
2 * Commandline option parsing functions
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com>
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26#include <stdio.h>
27#include <string.h>
28
29#include "qemu-common.h"
827b0813 30#include "qemu-error.h"
01e7f188 31#include "qemu-objects.h"
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32#include "qemu-option.h"
33
34/*
35 * Extracts the name of an option from the parameter string (p points at the
36 * first byte of the option name)
37 *
38 * The option name is delimited by delim (usually , or =) or the string end
39 * and is copied into buf. If the option name is longer than buf_size, it is
40 * truncated. buf is always zero terminated.
41 *
42 * The return value is the position of the delimiter/zero byte after the option
43 * name in p.
44 */
45const char *get_opt_name(char *buf, int buf_size, const char *p, char delim)
46{
47 char *q;
48
49 q = buf;
50 while (*p != '\0' && *p != delim) {
51 if (q && (q - buf) < buf_size - 1)
52 *q++ = *p;
53 p++;
54 }
55 if (q)
56 *q = '\0';
57
58 return p;
59}
60
61/*
62 * Extracts the value of an option from the parameter string p (p points at the
63 * first byte of the option value)
64 *
65 * This function is comparable to get_opt_name with the difference that the
66 * delimiter is fixed to be comma which starts a new option. To specify an
67 * option value that contains commas, double each comma.
68 */
69const char *get_opt_value(char *buf, int buf_size, const char *p)
70{
71 char *q;
72
73 q = buf;
74 while (*p != '\0') {
75 if (*p == ',') {
76 if (*(p + 1) != ',')
77 break;
78 p++;
79 }
80 if (q && (q - buf) < buf_size - 1)
81 *q++ = *p;
82 p++;
83 }
84 if (q)
85 *q = '\0';
86
87 return p;
88}
89
62c5802e
GH
90int get_next_param_value(char *buf, int buf_size,
91 const char *tag, const char **pstr)
92{
93 const char *p;
94 char option[128];
95
96 p = *pstr;
97 for(;;) {
98 p = get_opt_name(option, sizeof(option), p, '=');
99 if (*p != '=')
100 break;
101 p++;
102 if (!strcmp(tag, option)) {
103 *pstr = get_opt_value(buf, buf_size, p);
104 if (**pstr == ',') {
105 (*pstr)++;
106 }
107 return strlen(buf);
108 } else {
109 p = get_opt_value(NULL, 0, p);
110 }
111 if (*p != ',')
112 break;
113 p++;
114 }
115 return 0;
116}
117
118int get_param_value(char *buf, int buf_size,
119 const char *tag, const char *str)
120{
121 return get_next_param_value(buf, buf_size, tag, &str);
122}
123
124int check_params(char *buf, int buf_size,
125 const char * const *params, const char *str)
126{
127 const char *p;
128 int i;
129
130 p = str;
131 while (*p != '\0') {
132 p = get_opt_name(buf, buf_size, p, '=');
133 if (*p != '=') {
134 return -1;
135 }
136 p++;
137 for (i = 0; params[i] != NULL; i++) {
138 if (!strcmp(params[i], buf)) {
139 break;
140 }
141 }
142 if (params[i] == NULL) {
143 return -1;
144 }
145 p = get_opt_value(NULL, 0, p);
146 if (*p != ',') {
147 break;
148 }
149 p++;
150 }
151 return 0;
152}
153
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154/*
155 * Searches an option list for an option with the given name
156 */
157QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list,
158 const char *name)
159{
160 while (list && list->name) {
161 if (!strcmp(list->name, name)) {
162 return list;
163 }
164 list++;
165 }
166
167 return NULL;
168}
169
67b1355b
GH
170static int parse_option_bool(const char *name, const char *value, int *ret)
171{
172 if (value != NULL) {
173 if (!strcmp(value, "on")) {
174 *ret = 1;
175 } else if (!strcmp(value, "off")) {
176 *ret = 0;
177 } else {
178 fprintf(stderr, "Option '%s': Use 'on' or 'off'\n", name);
179 return -1;
180 }
181 } else {
182 *ret = 1;
183 }
184 return 0;
185}
186
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187static int parse_option_number(const char *name, const char *value, uint64_t *ret)
188{
189 char *postfix;
190 uint64_t number;
191
192 if (value != NULL) {
193 number = strtoull(value, &postfix, 0);
194 if (*postfix != '\0') {
195 fprintf(stderr, "Option '%s' needs a number as parameter\n", name);
196 return -1;
197 }
21c9f4cd 198 *ret = number;
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GH
199 } else {
200 fprintf(stderr, "Option '%s' needs a parameter\n", name);
201 return -1;
202 }
203 return 0;
204}
205
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GH
206static int parse_option_size(const char *name, const char *value, uint64_t *ret)
207{
208 char *postfix;
209 double sizef;
210
211 if (value != NULL) {
212 sizef = strtod(value, &postfix);
213 switch (*postfix) {
214 case 'T':
215 sizef *= 1024;
216 case 'G':
217 sizef *= 1024;
218 case 'M':
219 sizef *= 1024;
220 case 'K':
221 case 'k':
222 sizef *= 1024;
223 case 'b':
224 case '\0':
225 *ret = (uint64_t) sizef;
226 break;
227 default:
228 fprintf(stderr, "Option '%s' needs size as parameter\n", name);
229 fprintf(stderr, "You may use k, M, G or T suffixes for "
230 "kilobytes, megabytes, gigabytes and terabytes.\n");
231 return -1;
232 }
233 } else {
234 fprintf(stderr, "Option '%s' needs a parameter\n", name);
235 return -1;
236 }
237 return 0;
238}
239
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240/*
241 * Sets the value of a parameter in a given option list. The parsing of the
242 * value depends on the type of option:
243 *
244 * OPT_FLAG (uses value.n):
245 * If no value is given, the flag is set to 1.
246 * Otherwise the value must be "on" (set to 1) or "off" (set to 0)
247 *
248 * OPT_STRING (uses value.s):
249 * value is strdup()ed and assigned as option value
250 *
251 * OPT_SIZE (uses value.n):
252 * The value is converted to an integer. Suffixes for kilobytes etc. are
253 * allowed (powers of 1024).
254 *
255 * Returns 0 on succes, -1 in error cases
256 */
257int set_option_parameter(QEMUOptionParameter *list, const char *name,
258 const char *value)
259{
67b1355b
GH
260 int flag;
261
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262 // Find a matching parameter
263 list = get_option_parameter(list, name);
264 if (list == NULL) {
265 fprintf(stderr, "Unknown option '%s'\n", name);
266 return -1;
267 }
268
269 // Process parameter
270 switch (list->type) {
271 case OPT_FLAG:
3df04ac3 272 if (parse_option_bool(name, value, &flag) == -1)
67b1355b
GH
273 return -1;
274 list->value.n = flag;
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275 break;
276
277 case OPT_STRING:
278 if (value != NULL) {
d4c3fddd 279 list->value.s = qemu_strdup(value);
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KW
280 } else {
281 fprintf(stderr, "Option '%s' needs a parameter\n", name);
282 return -1;
283 }
284 break;
285
286 case OPT_SIZE:
3df04ac3 287 if (parse_option_size(name, value, &list->value.n) == -1)
d3f24367 288 return -1;
d3f24367 289 break;
7695019b 290
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291 default:
292 fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name);
293 return -1;
294 }
295
296 return 0;
297}
298
299/*
300 * Sets the given parameter to an integer instead of a string.
301 * This function cannot be used to set string options.
302 *
303 * Returns 0 on success, -1 in error cases
304 */
305int set_option_parameter_int(QEMUOptionParameter *list, const char *name,
306 uint64_t value)
307{
308 // Find a matching parameter
309 list = get_option_parameter(list, name);
310 if (list == NULL) {
311 fprintf(stderr, "Unknown option '%s'\n", name);
312 return -1;
313 }
314
315 // Process parameter
316 switch (list->type) {
317 case OPT_FLAG:
318 case OPT_NUMBER:
319 case OPT_SIZE:
320 list->value.n = value;
321 break;
322
323 default:
324 return -1;
325 }
326
327 return 0;
328}
329
330/*
331 * Frees a option list. If it contains strings, the strings are freed as well.
332 */
333void free_option_parameters(QEMUOptionParameter *list)
334{
335 QEMUOptionParameter *cur = list;
336
337 while (cur && cur->name) {
338 if (cur->type == OPT_STRING) {
d4c3fddd 339 qemu_free(cur->value.s);
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340 }
341 cur++;
342 }
343
d4c3fddd 344 qemu_free(list);
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345}
346
347/*
348 * Parses a parameter string (param) into an option list (dest).
349 *
350 * list is the templace is. If dest is NULL, a new copy of list is created for
351 * it. If list is NULL, this function fails.
352 *
353 * A parameter string consists of one or more parameters, separated by commas.
354 * Each parameter consists of its name and possibly of a value. In the latter
355 * case, the value is delimited by an = character. To specify a value which
356 * contains commas, double each comma so it won't be recognized as the end of
357 * the parameter.
358 *
359 * For more details of the parsing see above.
360 *
361 * Returns a pointer to the first element of dest (or the newly allocated copy)
362 * or NULL in error cases
363 */
364QEMUOptionParameter *parse_option_parameters(const char *param,
365 QEMUOptionParameter *list, QEMUOptionParameter *dest)
366{
367 QEMUOptionParameter *cur;
368 QEMUOptionParameter *allocated = NULL;
369 char name[256];
370 char value[256];
371 char *param_delim, *value_delim;
372 char next_delim;
373 size_t num_options;
374
375 if (list == NULL) {
376 return NULL;
377 }
378
379 if (dest == NULL) {
380 // Count valid options
381 num_options = 0;
382 cur = list;
383 while (cur->name) {
384 num_options++;
385 cur++;
386 }
387
388 // Create a copy of the option list to fill in values
389 dest = qemu_mallocz((num_options + 1) * sizeof(QEMUOptionParameter));
390 allocated = dest;
391 memcpy(dest, list, (num_options + 1) * sizeof(QEMUOptionParameter));
392 }
393
394 while (*param) {
395
396 // Find parameter name and value in the string
397 param_delim = strchr(param, ',');
398 value_delim = strchr(param, '=');
399
400 if (value_delim && (value_delim < param_delim || !param_delim)) {
401 next_delim = '=';
402 } else {
403 next_delim = ',';
404 value_delim = NULL;
405 }
406
407 param = get_opt_name(name, sizeof(name), param, next_delim);
408 if (value_delim) {
409 param = get_opt_value(value, sizeof(value), param + 1);
410 }
411 if (*param != '\0') {
412 param++;
413 }
414
415 // Set the parameter
416 if (set_option_parameter(dest, name, value_delim ? value : NULL)) {
417 goto fail;
418 }
419 }
420
421 return dest;
422
423fail:
424 // Only free the list if it was newly allocated
425 free_option_parameters(allocated);
426 return NULL;
427}
428
429/*
430 * Prints all options of a list that have a value to stdout
431 */
432void print_option_parameters(QEMUOptionParameter *list)
433{
434 while (list && list->name) {
435 switch (list->type) {
436 case OPT_STRING:
437 if (list->value.s != NULL) {
438 printf("%s='%s' ", list->name, list->value.s);
439 }
440 break;
441 case OPT_FLAG:
442 printf("%s=%s ", list->name, list->value.n ? "on" : "off");
443 break;
444 case OPT_SIZE:
445 case OPT_NUMBER:
446 printf("%s=%" PRId64 " ", list->name, list->value.n);
447 break;
448 default:
449 printf("%s=(unkown type) ", list->name);
450 break;
451 }
452 list++;
453 }
454}
db08adf5
KW
455
456/*
457 * Prints an overview of all available options
458 */
459void print_option_help(QEMUOptionParameter *list)
460{
461 printf("Supported options:\n");
462 while (list && list->name) {
463 printf("%-16s %s\n", list->name,
464 list->help ? list->help : "No description available");
465 list++;
466 }
467}
e27c88fe
GH
468
469/* ------------------------------------------------------------------ */
470
471struct QemuOpt {
472 const char *name;
473 const char *str;
474
238431a9 475 const QemuOptDesc *desc;
e27c88fe 476 union {
1f5c1775 477 int boolean;
e27c88fe
GH
478 uint64_t uint;
479 } value;
480
481 QemuOpts *opts;
72cf2d4f 482 QTAILQ_ENTRY(QemuOpt) next;
e27c88fe
GH
483};
484
485struct QemuOpts {
b09417b9 486 char *id;
e27c88fe 487 QemuOptsList *list;
827b0813 488 Location loc;
dc9ca4ba 489 QTAILQ_HEAD(QemuOptHead, QemuOpt) head;
72cf2d4f 490 QTAILQ_ENTRY(QemuOpts) next;
e27c88fe
GH
491};
492
493static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
494{
495 QemuOpt *opt;
496
dc9ca4ba 497 QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
e27c88fe
GH
498 if (strcmp(opt->name, name) != 0)
499 continue;
500 return opt;
501 }
502 return NULL;
503}
504
505const char *qemu_opt_get(QemuOpts *opts, const char *name)
506{
507 QemuOpt *opt = qemu_opt_find(opts, name);
508 return opt ? opt->str : NULL;
509}
510
511int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval)
512{
513 QemuOpt *opt = qemu_opt_find(opts, name);
514
515 if (opt == NULL)
516 return defval;
517 assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL);
1f5c1775 518 return opt->value.boolean;
e27c88fe
GH
519}
520
521uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
522{
523 QemuOpt *opt = qemu_opt_find(opts, name);
524
525 if (opt == NULL)
526 return defval;
527 assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER);
528 return opt->value.uint;
529}
530
531uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
532{
533 QemuOpt *opt = qemu_opt_find(opts, name);
534
535 if (opt == NULL)
536 return defval;
537 assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE);
538 return opt->value.uint;
539}
540
541static int qemu_opt_parse(QemuOpt *opt)
542{
543 if (opt->desc == NULL)
544 return 0;
545 switch (opt->desc->type) {
546 case QEMU_OPT_STRING:
547 /* nothing */
548 return 0;
549 case QEMU_OPT_BOOL:
1f5c1775 550 return parse_option_bool(opt->name, opt->str, &opt->value.boolean);
e27c88fe
GH
551 case QEMU_OPT_NUMBER:
552 return parse_option_number(opt->name, opt->str, &opt->value.uint);
553 case QEMU_OPT_SIZE:
554 return parse_option_size(opt->name, opt->str, &opt->value.uint);
555 default:
556 abort();
557 }
558}
559
560static void qemu_opt_del(QemuOpt *opt)
561{
72cf2d4f 562 QTAILQ_REMOVE(&opt->opts->head, opt, next);
e27c88fe
GH
563 qemu_free((/* !const */ char*)opt->name);
564 qemu_free((/* !const */ char*)opt->str);
565 qemu_free(opt);
566}
567
568int qemu_opt_set(QemuOpts *opts, const char *name, const char *value)
569{
570 QemuOpt *opt;
238431a9 571 const QemuOptDesc *desc = opts->list->desc;
dc9ca4ba 572 int i;
e27c88fe 573
dc9ca4ba
MM
574 for (i = 0; desc[i].name != NULL; i++) {
575 if (strcmp(desc[i].name, name) == 0) {
576 break;
e27c88fe 577 }
dc9ca4ba
MM
578 }
579 if (desc[i].name == NULL) {
580 if (i == 0) {
581 /* empty list -> allow any */;
582 } else {
583 fprintf(stderr, "option \"%s\" is not valid for %s\n",
584 name, opts->list->name);
585 return -1;
e27c88fe
GH
586 }
587 }
dc9ca4ba
MM
588
589 opt = qemu_mallocz(sizeof(*opt));
590 opt->name = qemu_strdup(name);
591 opt->opts = opts;
592 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
593 if (desc[i].name != NULL) {
594 opt->desc = desc+i;
595 }
e27c88fe
GH
596 if (value) {
597 opt->str = qemu_strdup(value);
598 }
599 if (qemu_opt_parse(opt) < 0) {
600 fprintf(stderr, "Failed to parse \"%s\" for \"%s.%s\"\n", opt->str,
601 opts->list->name, opt->name);
602 qemu_opt_del(opt);
603 return -1;
604 }
605 return 0;
606}
607
48026075
GH
608int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
609 int abort_on_failure)
610{
611 QemuOpt *opt;
612 int rc = 0;
613
72cf2d4f 614 QTAILQ_FOREACH(opt, &opts->head, next) {
48026075
GH
615 rc = func(opt->name, opt->str, opaque);
616 if (abort_on_failure && rc != 0)
617 break;
618 }
619 return rc;
620}
621
e27c88fe
GH
622QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
623{
624 QemuOpts *opts;
625
72cf2d4f 626 QTAILQ_FOREACH(opts, &list->head, next) {
e27c88fe
GH
627 if (!opts->id) {
628 continue;
629 }
630 if (strcmp(opts->id, id) != 0) {
631 continue;
632 }
633 return opts;
634 }
635 return NULL;
636}
637
638QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists)
639{
640 QemuOpts *opts = NULL;
641
642 if (id) {
643 opts = qemu_opts_find(list, id);
644 if (opts != NULL) {
645 if (fail_if_exists) {
646 fprintf(stderr, "tried to create id \"%s\" twice for \"%s\"\n",
647 id, list->name);
648 return NULL;
649 } else {
650 return opts;
651 }
652 }
653 }
654 opts = qemu_mallocz(sizeof(*opts));
655 if (id) {
656 opts->id = qemu_strdup(id);
657 }
658 opts->list = list;
827b0813 659 loc_save(&opts->loc);
72cf2d4f
BS
660 QTAILQ_INIT(&opts->head);
661 QTAILQ_INSERT_TAIL(&list->head, opts, next);
e27c88fe
GH
662 return opts;
663}
664
665int qemu_opts_set(QemuOptsList *list, const char *id,
666 const char *name, const char *value)
667{
668 QemuOpts *opts;
669
670 opts = qemu_opts_create(list, id, 1);
671 if (opts == NULL) {
e27c88fe
GH
672 return -1;
673 }
674 return qemu_opt_set(opts, name, value);
675}
676
48026075
GH
677const char *qemu_opts_id(QemuOpts *opts)
678{
679 return opts->id;
680}
681
e27c88fe
GH
682void qemu_opts_del(QemuOpts *opts)
683{
684 QemuOpt *opt;
685
686 for (;;) {
72cf2d4f 687 opt = QTAILQ_FIRST(&opts->head);
e27c88fe
GH
688 if (opt == NULL)
689 break;
690 qemu_opt_del(opt);
691 }
72cf2d4f 692 QTAILQ_REMOVE(&opts->list->head, opts, next);
b09417b9 693 qemu_free(opts->id);
e27c88fe
GH
694 qemu_free(opts);
695}
696
697int qemu_opts_print(QemuOpts *opts, void *dummy)
698{
699 QemuOpt *opt;
700
701 fprintf(stderr, "%s: %s:", opts->list->name,
702 opts->id ? opts->id : "<noid>");
72cf2d4f 703 QTAILQ_FOREACH(opt, &opts->head, next) {
e27c88fe
GH
704 fprintf(stderr, " %s=\"%s\"", opt->name, opt->str);
705 }
706 fprintf(stderr, "\n");
707 return 0;
708}
709
96729cbd 710int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname)
e27c88fe 711{
d318ff99 712 char option[128], value[1024];
e27c88fe
GH
713 const char *p,*pe,*pc;
714
2cfa571f 715 for (p = params; *p != '\0'; p++) {
e27c88fe
GH
716 pe = strchr(p, '=');
717 pc = strchr(p, ',');
718 if (!pe || (pc && pc < pe)) {
719 /* found "foo,more" */
720 if (p == params && firstname) {
721 /* implicitly named first option */
722 pstrcpy(option, sizeof(option), firstname);
723 p = get_opt_value(value, sizeof(value), p);
724 } else {
725 /* option without value, probably a flag */
726 p = get_opt_name(option, sizeof(option), p, ',');
96729cbd 727 if (strncmp(option, "no", 2) == 0) {
e27c88fe
GH
728 memmove(option, option+2, strlen(option+2)+1);
729 pstrcpy(value, sizeof(value), "off");
730 } else {
731 pstrcpy(value, sizeof(value), "on");
732 }
733 }
734 } else {
735 /* found "foo=bar,more" */
736 p = get_opt_name(option, sizeof(option), p, '=');
737 if (*p != '=') {
738 break;
739 }
740 p++;
741 p = get_opt_value(value, sizeof(value), p);
742 }
743 if (strcmp(option, "id") != 0) {
744 /* store and parse */
3df04ac3 745 if (qemu_opt_set(opts, option, value) == -1) {
96729cbd 746 return -1;
e27c88fe
GH
747 }
748 }
749 if (*p != ',') {
750 break;
751 }
e27c88fe 752 }
96729cbd
GH
753 return 0;
754}
755
8212c64f
MA
756QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
757 int permit_abbrev)
96729cbd 758{
8212c64f 759 const char *firstname;
d318ff99 760 char value[1024], *id = NULL;
96729cbd
GH
761 const char *p;
762 QemuOpts *opts;
763
8212c64f
MA
764 assert(!permit_abbrev || list->implied_opt_name);
765 firstname = permit_abbrev ? list->implied_opt_name : NULL;
766
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GH
767 if (strncmp(params, "id=", 3) == 0) {
768 get_opt_value(value, sizeof(value), params+3);
769 id = qemu_strdup(value);
770 } else if ((p = strstr(params, ",id=")) != NULL) {
771 get_opt_value(value, sizeof(value), p+4);
772 id = qemu_strdup(value);
773 }
774 opts = qemu_opts_create(list, id, 1);
775 if (opts == NULL)
776 return NULL;
777
778 if (qemu_opts_do_parse(opts, params, firstname) != 0) {
779 qemu_opts_del(opts);
780 return NULL;
781 }
782
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GH
783 return opts;
784}
785
01e7f188
MA
786static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque)
787{
788 char buf[32];
789 const char *value;
790 int n;
791
792 if (!strcmp(key, "id")) {
793 return;
794 }
795
796 switch (qobject_type(obj)) {
797 case QTYPE_QSTRING:
798 value = qstring_get_str(qobject_to_qstring(obj));
799 break;
800 case QTYPE_QINT:
801 n = snprintf(buf, sizeof(buf), "%" PRId64,
802 qint_get_int(qobject_to_qint(obj)));
803 assert(n < sizeof(buf));
804 value = buf;
805 break;
806 case QTYPE_QFLOAT:
807 n = snprintf(buf, sizeof(buf), "%.17g",
808 qfloat_get_double(qobject_to_qfloat(obj)));
809 assert(n < sizeof(buf));
810 value = buf;
811 break;
812 case QTYPE_QBOOL:
d35215f8
BS
813 pstrcpy(buf, sizeof(buf),
814 qbool_get_int(qobject_to_qbool(obj)) ? "on" : "off");
01e7f188
MA
815 value = buf;
816 break;
817 default:
818 return;
819 }
820 qemu_opt_set(opaque, key, value);
821}
822
823/*
824 * Create QemuOpts from a QDict.
825 * Use value of key "id" as ID if it exists and is a QString.
826 * Only QStrings, QInts, QFloats and QBools are copied. Entries with
827 * other types are silently ignored.
828 */
829QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict)
830{
831 QemuOpts *opts;
832
833 opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1);
834 if (opts == NULL)
835 return NULL;
836
837 qdict_iter(qdict, qemu_opts_from_qdict_1, opts);
838 return opts;
839}
840
841/*
842 * Convert from QemuOpts to QDict.
843 * The QDict values are of type QString.
844 * TODO We'll want to use types appropriate for opt->desc->type, but
845 * this is enough for now.
846 */
847QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict)
848{
849 QemuOpt *opt;
850 QObject *val;
851
852 if (!qdict) {
853 qdict = qdict_new();
854 }
855 if (opts->id) {
856 qdict_put(qdict, "id", qstring_from_str(opts->id));
857 }
858 QTAILQ_FOREACH(opt, &opts->head, next) {
859 val = QOBJECT(qstring_from_str(opt->str));
860 qdict_put_obj(qdict, opt->name, val);
861 }
862 return qdict;
863}
864
5dc519ef
MM
865/* Validate parsed opts against descriptions where no
866 * descriptions were provided in the QemuOptsList.
867 */
238431a9 868int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc)
5dc519ef
MM
869{
870 QemuOpt *opt;
871
872 assert(opts->list->desc[0].name == NULL);
873
874 QTAILQ_FOREACH(opt, &opts->head, next) {
875 int i;
876
877 for (i = 0; desc[i].name != NULL; i++) {
878 if (strcmp(desc[i].name, opt->name) == 0) {
879 break;
880 }
881 }
882 if (desc[i].name == NULL) {
883 fprintf(stderr, "option \"%s\" is not valid for %s\n",
884 opt->name, opts->list->name);
885 return -1;
886 }
887
888 opt->desc = &desc[i];
889
890 if (qemu_opt_parse(opt) < 0) {
891 return -1;
892 }
893 }
894
895 return 0;
896}
897
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GH
898int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
899 int abort_on_failure)
900{
827b0813 901 Location loc;
e27c88fe
GH
902 QemuOpts *opts;
903 int rc = 0;
904
827b0813 905 loc_push_none(&loc);
72cf2d4f 906 QTAILQ_FOREACH(opts, &list->head, next) {
827b0813 907 loc_restore(&opts->loc);
4a2594dd 908 rc |= func(opts, opaque);
e27c88fe
GH
909 if (abort_on_failure && rc != 0)
910 break;
911 }
827b0813 912 loc_pop(&loc);
e27c88fe
GH
913 return rc;
914}