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Commit | Line | Data |
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d3f24367 KW |
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 | ||
aafd7584 | 26 | #include "qemu/osdep.h" |
d3f24367 | 27 | |
da34e65c | 28 | #include "qapi/error.h" |
d3f24367 | 29 | #include "qemu-common.h" |
1de7afc9 | 30 | #include "qemu/error-report.h" |
7b1b5d19 | 31 | #include "qapi/qmp/types.h" |
7b1b5d19 | 32 | #include "qapi/qmp/qerror.h" |
1de7afc9 | 33 | #include "qemu/option_int.h" |
f348b6d1 VB |
34 | #include "qemu/cutils.h" |
35 | #include "qemu/id.h" | |
36 | #include "qemu/help_option.h" | |
d3f24367 KW |
37 | |
38 | /* | |
39 | * Extracts the name of an option from the parameter string (p points at the | |
40 | * first byte of the option name) | |
41 | * | |
42 | * The option name is delimited by delim (usually , or =) or the string end | |
43 | * and is copied into buf. If the option name is longer than buf_size, it is | |
44 | * truncated. buf is always zero terminated. | |
45 | * | |
46 | * The return value is the position of the delimiter/zero byte after the option | |
47 | * name in p. | |
48 | */ | |
49 | const char *get_opt_name(char *buf, int buf_size, const char *p, char delim) | |
50 | { | |
51 | char *q; | |
52 | ||
53 | q = buf; | |
54 | while (*p != '\0' && *p != delim) { | |
55 | if (q && (q - buf) < buf_size - 1) | |
56 | *q++ = *p; | |
57 | p++; | |
58 | } | |
59 | if (q) | |
60 | *q = '\0'; | |
61 | ||
62 | return p; | |
63 | } | |
64 | ||
65 | /* | |
66 | * Extracts the value of an option from the parameter string p (p points at the | |
67 | * first byte of the option value) | |
68 | * | |
69 | * This function is comparable to get_opt_name with the difference that the | |
70 | * delimiter is fixed to be comma which starts a new option. To specify an | |
71 | * option value that contains commas, double each comma. | |
72 | */ | |
73 | const char *get_opt_value(char *buf, int buf_size, const char *p) | |
74 | { | |
75 | char *q; | |
76 | ||
77 | q = buf; | |
78 | while (*p != '\0') { | |
79 | if (*p == ',') { | |
80 | if (*(p + 1) != ',') | |
81 | break; | |
82 | p++; | |
83 | } | |
84 | if (q && (q - buf) < buf_size - 1) | |
85 | *q++ = *p; | |
86 | p++; | |
87 | } | |
88 | if (q) | |
89 | *q = '\0'; | |
90 | ||
91 | return p; | |
92 | } | |
93 | ||
62c5802e GH |
94 | int get_next_param_value(char *buf, int buf_size, |
95 | const char *tag, const char **pstr) | |
96 | { | |
97 | const char *p; | |
98 | char option[128]; | |
99 | ||
100 | p = *pstr; | |
101 | for(;;) { | |
102 | p = get_opt_name(option, sizeof(option), p, '='); | |
103 | if (*p != '=') | |
104 | break; | |
105 | p++; | |
106 | if (!strcmp(tag, option)) { | |
107 | *pstr = get_opt_value(buf, buf_size, p); | |
108 | if (**pstr == ',') { | |
109 | (*pstr)++; | |
110 | } | |
111 | return strlen(buf); | |
112 | } else { | |
113 | p = get_opt_value(NULL, 0, p); | |
114 | } | |
115 | if (*p != ',') | |
116 | break; | |
117 | p++; | |
118 | } | |
119 | return 0; | |
120 | } | |
121 | ||
122 | int get_param_value(char *buf, int buf_size, | |
123 | const char *tag, const char *str) | |
124 | { | |
125 | return get_next_param_value(buf, buf_size, tag, &str); | |
126 | } | |
127 | ||
cf62adfa LC |
128 | static void parse_option_bool(const char *name, const char *value, bool *ret, |
129 | Error **errp) | |
67b1355b | 130 | { |
8ee8409e | 131 | if (!strcmp(value, "on")) { |
67b1355b | 132 | *ret = 1; |
8ee8409e MA |
133 | } else if (!strcmp(value, "off")) { |
134 | *ret = 0; | |
135 | } else { | |
136 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
137 | name, "'on' or 'off'"); | |
67b1355b | 138 | } |
67b1355b GH |
139 | } |
140 | ||
2f39df5b LC |
141 | static void parse_option_number(const char *name, const char *value, |
142 | uint64_t *ret, Error **errp) | |
e27c88fe GH |
143 | { |
144 | char *postfix; | |
145 | uint64_t number; | |
146 | ||
8ee8409e MA |
147 | number = strtoull(value, &postfix, 0); |
148 | if (*postfix != '\0') { | |
c6bd8c70 | 149 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); |
8ee8409e | 150 | return; |
e27c88fe | 151 | } |
8ee8409e | 152 | *ret = number; |
e27c88fe GH |
153 | } |
154 | ||
5e89db76 CL |
155 | static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc, |
156 | const char *name) | |
157 | { | |
158 | int i; | |
159 | ||
160 | for (i = 0; desc[i].name != NULL; i++) { | |
161 | if (strcmp(desc[i].name, name) == 0) { | |
162 | return &desc[i]; | |
163 | } | |
164 | } | |
165 | ||
166 | return NULL; | |
167 | } | |
168 | ||
e8cd45c7 VL |
169 | void parse_option_size(const char *name, const char *value, |
170 | uint64_t *ret, Error **errp) | |
7695019b GH |
171 | { |
172 | char *postfix; | |
173 | double sizef; | |
174 | ||
8ee8409e MA |
175 | sizef = strtod(value, &postfix); |
176 | if (sizef < 0 || sizef > UINT64_MAX) { | |
177 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, | |
178 | "a non-negative number below 2^64"); | |
179 | return; | |
180 | } | |
181 | switch (*postfix) { | |
182 | case 'T': | |
183 | sizef *= 1024; | |
184 | /* fall through */ | |
185 | case 'G': | |
186 | sizef *= 1024; | |
187 | /* fall through */ | |
188 | case 'M': | |
189 | sizef *= 1024; | |
190 | /* fall through */ | |
191 | case 'K': | |
192 | case 'k': | |
193 | sizef *= 1024; | |
194 | /* fall through */ | |
195 | case 'b': | |
196 | case '\0': | |
197 | *ret = (uint64_t) sizef; | |
198 | break; | |
199 | default: | |
c6bd8c70 | 200 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); |
8ee8409e MA |
201 | error_append_hint(errp, "You may use k, M, G or T suffixes for " |
202 | "kilobytes, megabytes, gigabytes and terabytes.\n"); | |
203 | return; | |
7695019b | 204 | } |
7695019b GH |
205 | } |
206 | ||
7cc07ab8 KW |
207 | bool has_help_option(const char *param) |
208 | { | |
209 | size_t buflen = strlen(param) + 1; | |
96c044af | 210 | char *buf = g_malloc(buflen); |
7cc07ab8 KW |
211 | const char *p = param; |
212 | bool result = false; | |
213 | ||
214 | while (*p) { | |
215 | p = get_opt_value(buf, buflen, p); | |
216 | if (*p) { | |
217 | p++; | |
218 | } | |
219 | ||
220 | if (is_help_option(buf)) { | |
221 | result = true; | |
222 | goto out; | |
223 | } | |
224 | } | |
225 | ||
226 | out: | |
c0462f6d | 227 | g_free(buf); |
7cc07ab8 KW |
228 | return result; |
229 | } | |
230 | ||
231 | bool is_valid_option_list(const char *param) | |
232 | { | |
233 | size_t buflen = strlen(param) + 1; | |
96c044af | 234 | char *buf = g_malloc(buflen); |
7cc07ab8 KW |
235 | const char *p = param; |
236 | bool result = true; | |
237 | ||
238 | while (*p) { | |
239 | p = get_opt_value(buf, buflen, p); | |
240 | if (*p && !*++p) { | |
241 | result = false; | |
242 | goto out; | |
243 | } | |
244 | ||
245 | if (!*buf || *buf == ',') { | |
246 | result = false; | |
247 | goto out; | |
248 | } | |
249 | } | |
250 | ||
251 | out: | |
c0462f6d | 252 | g_free(buf); |
7cc07ab8 KW |
253 | return result; |
254 | } | |
255 | ||
504189a9 CL |
256 | void qemu_opts_print_help(QemuOptsList *list) |
257 | { | |
258 | QemuOptDesc *desc; | |
259 | ||
260 | assert(list); | |
261 | desc = list->desc; | |
262 | printf("Supported options:\n"); | |
263 | while (desc && desc->name) { | |
264 | printf("%-16s %s\n", desc->name, | |
265 | desc->help ? desc->help : "No description available"); | |
266 | desc++; | |
267 | } | |
268 | } | |
e27c88fe GH |
269 | /* ------------------------------------------------------------------ */ |
270 | ||
74c3c197 | 271 | QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) |
e27c88fe GH |
272 | { |
273 | QemuOpt *opt; | |
274 | ||
dc9ca4ba | 275 | QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { |
e27c88fe GH |
276 | if (strcmp(opt->name, name) != 0) |
277 | continue; | |
278 | return opt; | |
279 | } | |
280 | return NULL; | |
281 | } | |
282 | ||
fc345512 CL |
283 | static void qemu_opt_del(QemuOpt *opt) |
284 | { | |
285 | QTAILQ_REMOVE(&opt->opts->head, opt, next); | |
286 | g_free(opt->name); | |
287 | g_free(opt->str); | |
288 | g_free(opt); | |
289 | } | |
290 | ||
782730b0 CL |
291 | /* qemu_opt_set allows many settings for the same option. |
292 | * This function deletes all settings for an option. | |
293 | */ | |
294 | static void qemu_opt_del_all(QemuOpts *opts, const char *name) | |
295 | { | |
296 | QemuOpt *opt, *next_opt; | |
297 | ||
298 | QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) { | |
299 | if (!strcmp(opt->name, name)) { | |
300 | qemu_opt_del(opt); | |
301 | } | |
302 | } | |
303 | } | |
304 | ||
e27c88fe GH |
305 | const char *qemu_opt_get(QemuOpts *opts, const char *name) |
306 | { | |
435db4cf CL |
307 | QemuOpt *opt; |
308 | ||
309 | if (opts == NULL) { | |
310 | return NULL; | |
311 | } | |
09722032 | 312 | |
435db4cf | 313 | opt = qemu_opt_find(opts, name); |
09722032 CL |
314 | if (!opt) { |
315 | const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); | |
316 | if (desc && desc->def_value_str) { | |
317 | return desc->def_value_str; | |
318 | } | |
319 | } | |
e27c88fe GH |
320 | return opt ? opt->str : NULL; |
321 | } | |
322 | ||
e998e209 DB |
323 | void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name) |
324 | { | |
325 | iter->opts = opts; | |
326 | iter->opt = QTAILQ_FIRST(&opts->head); | |
327 | iter->name = name; | |
328 | } | |
329 | ||
330 | const char *qemu_opt_iter_next(QemuOptsIter *iter) | |
331 | { | |
332 | QemuOpt *ret = iter->opt; | |
333 | if (iter->name) { | |
334 | while (ret && !g_str_equal(iter->name, ret->name)) { | |
335 | ret = QTAILQ_NEXT(ret, next); | |
336 | } | |
337 | } | |
338 | iter->opt = ret ? QTAILQ_NEXT(ret, next) : NULL; | |
339 | return ret ? ret->str : NULL; | |
340 | } | |
341 | ||
782730b0 CL |
342 | /* Get a known option (or its default) and remove it from the list |
343 | * all in one action. Return a malloced string of the option value. | |
344 | * Result must be freed by caller with g_free(). | |
345 | */ | |
346 | char *qemu_opt_get_del(QemuOpts *opts, const char *name) | |
347 | { | |
348 | QemuOpt *opt; | |
349 | const QemuOptDesc *desc; | |
350 | char *str = NULL; | |
351 | ||
352 | if (opts == NULL) { | |
353 | return NULL; | |
354 | } | |
355 | ||
356 | opt = qemu_opt_find(opts, name); | |
357 | if (!opt) { | |
358 | desc = find_desc_by_name(opts->list->desc, name); | |
359 | if (desc && desc->def_value_str) { | |
360 | str = g_strdup(desc->def_value_str); | |
361 | } | |
362 | return str; | |
363 | } | |
364 | str = opt->str; | |
365 | opt->str = NULL; | |
366 | qemu_opt_del_all(opts, name); | |
367 | return str; | |
368 | } | |
369 | ||
c8057f95 PM |
370 | bool qemu_opt_has_help_opt(QemuOpts *opts) |
371 | { | |
372 | QemuOpt *opt; | |
373 | ||
374 | QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { | |
375 | if (is_help_option(opt->name)) { | |
376 | return true; | |
377 | } | |
378 | } | |
379 | return false; | |
380 | } | |
381 | ||
782730b0 CL |
382 | static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name, |
383 | bool defval, bool del) | |
e27c88fe | 384 | { |
435db4cf | 385 | QemuOpt *opt; |
782730b0 | 386 | bool ret = defval; |
e27c88fe | 387 | |
435db4cf CL |
388 | if (opts == NULL) { |
389 | return ret; | |
390 | } | |
391 | ||
392 | opt = qemu_opt_find(opts, name); | |
09722032 CL |
393 | if (opt == NULL) { |
394 | const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); | |
395 | if (desc && desc->def_value_str) { | |
782730b0 | 396 | parse_option_bool(name, desc->def_value_str, &ret, &error_abort); |
09722032 | 397 | } |
782730b0 | 398 | return ret; |
09722032 | 399 | } |
e27c88fe | 400 | assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL); |
782730b0 CL |
401 | ret = opt->value.boolean; |
402 | if (del) { | |
403 | qemu_opt_del_all(opts, name); | |
404 | } | |
405 | return ret; | |
e27c88fe GH |
406 | } |
407 | ||
782730b0 CL |
408 | bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval) |
409 | { | |
410 | return qemu_opt_get_bool_helper(opts, name, defval, false); | |
411 | } | |
412 | ||
413 | bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval) | |
414 | { | |
415 | return qemu_opt_get_bool_helper(opts, name, defval, true); | |
416 | } | |
417 | ||
418 | static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name, | |
419 | uint64_t defval, bool del) | |
e27c88fe | 420 | { |
435db4cf | 421 | QemuOpt *opt; |
782730b0 | 422 | uint64_t ret = defval; |
e27c88fe | 423 | |
435db4cf CL |
424 | if (opts == NULL) { |
425 | return ret; | |
426 | } | |
427 | ||
428 | opt = qemu_opt_find(opts, name); | |
09722032 CL |
429 | if (opt == NULL) { |
430 | const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); | |
431 | if (desc && desc->def_value_str) { | |
782730b0 | 432 | parse_option_number(name, desc->def_value_str, &ret, &error_abort); |
09722032 | 433 | } |
782730b0 | 434 | return ret; |
09722032 | 435 | } |
e27c88fe | 436 | assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER); |
782730b0 CL |
437 | ret = opt->value.uint; |
438 | if (del) { | |
439 | qemu_opt_del_all(opts, name); | |
440 | } | |
441 | return ret; | |
e27c88fe GH |
442 | } |
443 | ||
782730b0 CL |
444 | uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) |
445 | { | |
446 | return qemu_opt_get_number_helper(opts, name, defval, false); | |
447 | } | |
448 | ||
449 | uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name, | |
450 | uint64_t defval) | |
451 | { | |
452 | return qemu_opt_get_number_helper(opts, name, defval, true); | |
453 | } | |
454 | ||
455 | static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name, | |
456 | uint64_t defval, bool del) | |
e27c88fe | 457 | { |
435db4cf | 458 | QemuOpt *opt; |
782730b0 | 459 | uint64_t ret = defval; |
e27c88fe | 460 | |
435db4cf CL |
461 | if (opts == NULL) { |
462 | return ret; | |
463 | } | |
464 | ||
465 | opt = qemu_opt_find(opts, name); | |
09722032 CL |
466 | if (opt == NULL) { |
467 | const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); | |
468 | if (desc && desc->def_value_str) { | |
782730b0 | 469 | parse_option_size(name, desc->def_value_str, &ret, &error_abort); |
09722032 | 470 | } |
782730b0 | 471 | return ret; |
09722032 | 472 | } |
e27c88fe | 473 | assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE); |
782730b0 CL |
474 | ret = opt->value.uint; |
475 | if (del) { | |
476 | qemu_opt_del_all(opts, name); | |
477 | } | |
478 | return ret; | |
479 | } | |
480 | ||
481 | uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) | |
482 | { | |
483 | return qemu_opt_get_size_helper(opts, name, defval, false); | |
484 | } | |
485 | ||
486 | uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name, | |
487 | uint64_t defval) | |
488 | { | |
489 | return qemu_opt_get_size_helper(opts, name, defval, true); | |
e27c88fe GH |
490 | } |
491 | ||
6c519404 | 492 | static void qemu_opt_parse(QemuOpt *opt, Error **errp) |
e27c88fe GH |
493 | { |
494 | if (opt->desc == NULL) | |
6c519404 | 495 | return; |
2f39df5b | 496 | |
e27c88fe GH |
497 | switch (opt->desc->type) { |
498 | case QEMU_OPT_STRING: | |
499 | /* nothing */ | |
6c519404 | 500 | return; |
e27c88fe | 501 | case QEMU_OPT_BOOL: |
6c519404 | 502 | parse_option_bool(opt->name, opt->str, &opt->value.boolean, errp); |
cf62adfa | 503 | break; |
e27c88fe | 504 | case QEMU_OPT_NUMBER: |
6c519404 | 505 | parse_option_number(opt->name, opt->str, &opt->value.uint, errp); |
2f39df5b | 506 | break; |
e27c88fe | 507 | case QEMU_OPT_SIZE: |
6c519404 | 508 | parse_option_size(opt->name, opt->str, &opt->value.uint, errp); |
ec7b2ccb | 509 | break; |
e27c88fe GH |
510 | default: |
511 | abort(); | |
512 | } | |
513 | } | |
514 | ||
c474ced8 DXW |
515 | static bool opts_accepts_any(const QemuOpts *opts) |
516 | { | |
517 | return opts->list->desc[0].name == NULL; | |
518 | } | |
519 | ||
0dd6c526 KW |
520 | int qemu_opt_unset(QemuOpts *opts, const char *name) |
521 | { | |
522 | QemuOpt *opt = qemu_opt_find(opts, name); | |
523 | ||
524 | assert(opts_accepts_any(opts)); | |
525 | ||
526 | if (opt == NULL) { | |
527 | return -1; | |
528 | } else { | |
529 | qemu_opt_del(opt); | |
530 | return 0; | |
531 | } | |
532 | } | |
533 | ||
c474ced8 DXW |
534 | static void opt_set(QemuOpts *opts, const char *name, const char *value, |
535 | bool prepend, Error **errp) | |
536 | { | |
537 | QemuOpt *opt; | |
538 | const QemuOptDesc *desc; | |
539 | Error *local_err = NULL; | |
540 | ||
541 | desc = find_desc_by_name(opts->list->desc, name); | |
542 | if (!desc && !opts_accepts_any(opts)) { | |
c6bd8c70 | 543 | error_setg(errp, QERR_INVALID_PARAMETER, name); |
c474ced8 | 544 | return; |
e27c88fe | 545 | } |
dc9ca4ba | 546 | |
7267c094 AL |
547 | opt = g_malloc0(sizeof(*opt)); |
548 | opt->name = g_strdup(name); | |
dc9ca4ba | 549 | opt->opts = opts; |
4f6dd9af JK |
550 | if (prepend) { |
551 | QTAILQ_INSERT_HEAD(&opts->head, opt, next); | |
552 | } else { | |
553 | QTAILQ_INSERT_TAIL(&opts->head, opt, next); | |
554 | } | |
c474ced8 | 555 | opt->desc = desc; |
c64f50d1 | 556 | opt->str = g_strdup(value); |
8ee8409e | 557 | assert(opt->str); |
6c519404 | 558 | qemu_opt_parse(opt, &local_err); |
84d18f06 | 559 | if (local_err) { |
584d4064 | 560 | error_propagate(errp, local_err); |
e27c88fe | 561 | qemu_opt_del(opt); |
e27c88fe | 562 | } |
e27c88fe GH |
563 | } |
564 | ||
f43e47db MA |
565 | void qemu_opt_set(QemuOpts *opts, const char *name, const char *value, |
566 | Error **errp) | |
384f2139 LC |
567 | { |
568 | opt_set(opts, name, value, false, errp); | |
569 | } | |
570 | ||
cccb7967 MA |
571 | void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val, |
572 | Error **errp) | |
f02b77c9 MK |
573 | { |
574 | QemuOpt *opt; | |
575 | const QemuOptDesc *desc = opts->list->desc; | |
f02b77c9 | 576 | |
ad718d01 DXW |
577 | opt = g_malloc0(sizeof(*opt)); |
578 | opt->desc = find_desc_by_name(desc, name); | |
579 | if (!opt->desc && !opts_accepts_any(opts)) { | |
c6bd8c70 | 580 | error_setg(errp, QERR_INVALID_PARAMETER, name); |
ad718d01 | 581 | g_free(opt); |
cccb7967 | 582 | return; |
f02b77c9 MK |
583 | } |
584 | ||
f02b77c9 MK |
585 | opt->name = g_strdup(name); |
586 | opt->opts = opts; | |
f02b77c9 | 587 | opt->value.boolean = !!val; |
ad718d01 DXW |
588 | opt->str = g_strdup(val ? "on" : "off"); |
589 | QTAILQ_INSERT_TAIL(&opts->head, opt, next); | |
f02b77c9 MK |
590 | } |
591 | ||
39101f25 MA |
592 | void qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val, |
593 | Error **errp) | |
b83c18e2 DXW |
594 | { |
595 | QemuOpt *opt; | |
596 | const QemuOptDesc *desc = opts->list->desc; | |
597 | ||
598 | opt = g_malloc0(sizeof(*opt)); | |
599 | opt->desc = find_desc_by_name(desc, name); | |
600 | if (!opt->desc && !opts_accepts_any(opts)) { | |
c6bd8c70 | 601 | error_setg(errp, QERR_INVALID_PARAMETER, name); |
b83c18e2 | 602 | g_free(opt); |
39101f25 | 603 | return; |
b83c18e2 DXW |
604 | } |
605 | ||
606 | opt->name = g_strdup(name); | |
607 | opt->opts = opts; | |
608 | opt->value.uint = val; | |
609 | opt->str = g_strdup_printf("%" PRId64, val); | |
610 | QTAILQ_INSERT_TAIL(&opts->head, opt, next); | |
b83c18e2 DXW |
611 | } |
612 | ||
1640b200 | 613 | /** |
71df1d83 MA |
614 | * For each member of @opts, call @func(@opaque, name, value, @errp). |
615 | * @func() may store an Error through @errp, but must return non-zero then. | |
1640b200 MA |
616 | * When @func() returns non-zero, break the loop and return that value. |
617 | * Return zero when the loop completes. | |
618 | */ | |
71df1d83 MA |
619 | int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque, |
620 | Error **errp) | |
48026075 GH |
621 | { |
622 | QemuOpt *opt; | |
1640b200 | 623 | int rc; |
48026075 | 624 | |
72cf2d4f | 625 | QTAILQ_FOREACH(opt, &opts->head, next) { |
71df1d83 | 626 | rc = func(opaque, opt->name, opt->str, errp); |
1640b200 MA |
627 | if (rc) { |
628 | return rc; | |
629 | } | |
71df1d83 | 630 | assert(!errp || !*errp); |
48026075 | 631 | } |
1640b200 | 632 | return 0; |
48026075 GH |
633 | } |
634 | ||
e27c88fe GH |
635 | QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id) |
636 | { | |
637 | QemuOpts *opts; | |
638 | ||
72cf2d4f | 639 | QTAILQ_FOREACH(opts, &list->head, next) { |
96bc97eb MA |
640 | if (!opts->id && !id) { |
641 | return opts; | |
e27c88fe | 642 | } |
96bc97eb MA |
643 | if (opts->id && id && !strcmp(opts->id, id)) { |
644 | return opts; | |
e27c88fe | 645 | } |
e27c88fe GH |
646 | } |
647 | return NULL; | |
648 | } | |
649 | ||
8be7e7e4 LC |
650 | QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, |
651 | int fail_if_exists, Error **errp) | |
e27c88fe GH |
652 | { |
653 | QemuOpts *opts = NULL; | |
654 | ||
655 | if (id) { | |
f5bebbbb | 656 | if (!id_wellformed(id)) { |
c6bd8c70 MA |
657 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id", |
658 | "an identifier"); | |
50b7b000 | 659 | error_append_hint(errp, "Identifiers consist of letters, digits, " |
543202c0 | 660 | "'-', '.', '_', starting with a letter.\n"); |
b560a9ab MA |
661 | return NULL; |
662 | } | |
e27c88fe GH |
663 | opts = qemu_opts_find(list, id); |
664 | if (opts != NULL) { | |
da93318a | 665 | if (fail_if_exists && !list->merge_lists) { |
f231b88d | 666 | error_setg(errp, "Duplicate ID '%s' for %s", id, list->name); |
e27c88fe GH |
667 | return NULL; |
668 | } else { | |
669 | return opts; | |
670 | } | |
671 | } | |
da93318a PM |
672 | } else if (list->merge_lists) { |
673 | opts = qemu_opts_find(list, NULL); | |
674 | if (opts) { | |
675 | return opts; | |
676 | } | |
e27c88fe | 677 | } |
7267c094 | 678 | opts = g_malloc0(sizeof(*opts)); |
c64f50d1 | 679 | opts->id = g_strdup(id); |
e27c88fe | 680 | opts->list = list; |
827b0813 | 681 | loc_save(&opts->loc); |
72cf2d4f BS |
682 | QTAILQ_INIT(&opts->head); |
683 | QTAILQ_INSERT_TAIL(&list->head, opts, next); | |
e27c88fe GH |
684 | return opts; |
685 | } | |
686 | ||
bb67ab02 MA |
687 | void qemu_opts_reset(QemuOptsList *list) |
688 | { | |
689 | QemuOpts *opts, *next_opts; | |
690 | ||
691 | QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) { | |
692 | qemu_opts_del(opts); | |
693 | } | |
694 | } | |
695 | ||
94ac7268 MA |
696 | void qemu_opts_loc_restore(QemuOpts *opts) |
697 | { | |
698 | loc_restore(&opts->loc); | |
699 | } | |
700 | ||
79087c78 MA |
701 | void qemu_opts_set(QemuOptsList *list, const char *id, |
702 | const char *name, const char *value, Error **errp) | |
e27c88fe GH |
703 | { |
704 | QemuOpts *opts; | |
8be7e7e4 | 705 | Error *local_err = NULL; |
e27c88fe | 706 | |
8be7e7e4 | 707 | opts = qemu_opts_create(list, id, 1, &local_err); |
84d18f06 | 708 | if (local_err) { |
79087c78 MA |
709 | error_propagate(errp, local_err); |
710 | return; | |
e27c88fe | 711 | } |
f43e47db | 712 | qemu_opt_set(opts, name, value, errp); |
e27c88fe GH |
713 | } |
714 | ||
48026075 GH |
715 | const char *qemu_opts_id(QemuOpts *opts) |
716 | { | |
717 | return opts->id; | |
718 | } | |
719 | ||
326642bc KW |
720 | /* The id string will be g_free()d by qemu_opts_del */ |
721 | void qemu_opts_set_id(QemuOpts *opts, char *id) | |
722 | { | |
723 | opts->id = id; | |
724 | } | |
725 | ||
e27c88fe GH |
726 | void qemu_opts_del(QemuOpts *opts) |
727 | { | |
728 | QemuOpt *opt; | |
729 | ||
4782183d CL |
730 | if (opts == NULL) { |
731 | return; | |
732 | } | |
733 | ||
e27c88fe | 734 | for (;;) { |
72cf2d4f | 735 | opt = QTAILQ_FIRST(&opts->head); |
e27c88fe GH |
736 | if (opt == NULL) |
737 | break; | |
738 | qemu_opt_del(opt); | |
739 | } | |
72cf2d4f | 740 | QTAILQ_REMOVE(&opts->list->head, opts, next); |
7267c094 AL |
741 | g_free(opts->id); |
742 | g_free(opts); | |
e27c88fe GH |
743 | } |
744 | ||
fe646693 KZ |
745 | /* print value, escaping any commas in value */ |
746 | static void escaped_print(const char *value) | |
747 | { | |
748 | const char *ptr; | |
749 | ||
750 | for (ptr = value; *ptr; ++ptr) { | |
751 | if (*ptr == ',') { | |
752 | putchar(','); | |
753 | } | |
754 | putchar(*ptr); | |
755 | } | |
756 | } | |
757 | ||
758 | void qemu_opts_print(QemuOpts *opts, const char *separator) | |
e27c88fe GH |
759 | { |
760 | QemuOpt *opt; | |
09722032 | 761 | QemuOptDesc *desc = opts->list->desc; |
fe646693 KZ |
762 | const char *sep = ""; |
763 | ||
764 | if (opts->id) { | |
765 | printf("id=%s", opts->id); /* passed id_wellformed -> no commas */ | |
766 | sep = separator; | |
767 | } | |
e27c88fe | 768 | |
09722032 CL |
769 | if (desc[0].name == NULL) { |
770 | QTAILQ_FOREACH(opt, &opts->head, next) { | |
fe646693 KZ |
771 | printf("%s%s=", sep, opt->name); |
772 | escaped_print(opt->str); | |
773 | sep = separator; | |
09722032 CL |
774 | } |
775 | return; | |
776 | } | |
777 | for (; desc && desc->name; desc++) { | |
778 | const char *value; | |
779 | QemuOpt *opt = qemu_opt_find(opts, desc->name); | |
780 | ||
781 | value = opt ? opt->str : desc->def_value_str; | |
782 | if (!value) { | |
783 | continue; | |
784 | } | |
785 | if (desc->type == QEMU_OPT_STRING) { | |
fe646693 KZ |
786 | printf("%s%s=", sep, desc->name); |
787 | escaped_print(value); | |
09722032 CL |
788 | } else if ((desc->type == QEMU_OPT_SIZE || |
789 | desc->type == QEMU_OPT_NUMBER) && opt) { | |
43c5d8f8 | 790 | printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint); |
09722032 | 791 | } else { |
43c5d8f8 | 792 | printf("%s%s=%s", sep, desc->name, value); |
09722032 | 793 | } |
fe646693 | 794 | sep = separator; |
e27c88fe | 795 | } |
e27c88fe GH |
796 | } |
797 | ||
d93ae3cf MA |
798 | static void opts_do_parse(QemuOpts *opts, const char *params, |
799 | const char *firstname, bool prepend, Error **errp) | |
e27c88fe | 800 | { |
d318ff99 | 801 | char option[128], value[1024]; |
e27c88fe | 802 | const char *p,*pe,*pc; |
584d4064 | 803 | Error *local_err = NULL; |
e27c88fe | 804 | |
2cfa571f | 805 | for (p = params; *p != '\0'; p++) { |
e27c88fe GH |
806 | pe = strchr(p, '='); |
807 | pc = strchr(p, ','); | |
808 | if (!pe || (pc && pc < pe)) { | |
809 | /* found "foo,more" */ | |
810 | if (p == params && firstname) { | |
811 | /* implicitly named first option */ | |
812 | pstrcpy(option, sizeof(option), firstname); | |
813 | p = get_opt_value(value, sizeof(value), p); | |
814 | } else { | |
815 | /* option without value, probably a flag */ | |
816 | p = get_opt_name(option, sizeof(option), p, ','); | |
96729cbd | 817 | if (strncmp(option, "no", 2) == 0) { |
e27c88fe GH |
818 | memmove(option, option+2, strlen(option+2)+1); |
819 | pstrcpy(value, sizeof(value), "off"); | |
820 | } else { | |
821 | pstrcpy(value, sizeof(value), "on"); | |
822 | } | |
823 | } | |
824 | } else { | |
825 | /* found "foo=bar,more" */ | |
826 | p = get_opt_name(option, sizeof(option), p, '='); | |
827 | if (*p != '=') { | |
828 | break; | |
829 | } | |
830 | p++; | |
831 | p = get_opt_value(value, sizeof(value), p); | |
832 | } | |
833 | if (strcmp(option, "id") != 0) { | |
834 | /* store and parse */ | |
584d4064 | 835 | opt_set(opts, option, value, prepend, &local_err); |
84d18f06 | 836 | if (local_err) { |
d93ae3cf MA |
837 | error_propagate(errp, local_err); |
838 | return; | |
e27c88fe GH |
839 | } |
840 | } | |
841 | if (*p != ',') { | |
842 | break; | |
843 | } | |
e27c88fe | 844 | } |
96729cbd GH |
845 | } |
846 | ||
dc523cd3 MA |
847 | /** |
848 | * Store options parsed from @params into @opts. | |
849 | * If @firstname is non-null, the first key=value in @params may omit | |
850 | * key=, and is treated as if key was @firstname. | |
851 | * On error, store an error object through @errp if non-null. | |
852 | */ | |
853 | void qemu_opts_do_parse(QemuOpts *opts, const char *params, | |
854 | const char *firstname, Error **errp) | |
4f6dd9af | 855 | { |
dc523cd3 | 856 | opts_do_parse(opts, params, firstname, false, errp); |
4f6dd9af JK |
857 | } |
858 | ||
859 | static QemuOpts *opts_parse(QemuOptsList *list, const char *params, | |
70b94331 | 860 | bool permit_abbrev, bool defaults, Error **errp) |
96729cbd | 861 | { |
8212c64f | 862 | const char *firstname; |
d318ff99 | 863 | char value[1024], *id = NULL; |
96729cbd GH |
864 | const char *p; |
865 | QemuOpts *opts; | |
8be7e7e4 | 866 | Error *local_err = NULL; |
96729cbd | 867 | |
8212c64f MA |
868 | assert(!permit_abbrev || list->implied_opt_name); |
869 | firstname = permit_abbrev ? list->implied_opt_name : NULL; | |
870 | ||
96729cbd GH |
871 | if (strncmp(params, "id=", 3) == 0) { |
872 | get_opt_value(value, sizeof(value), params+3); | |
d510c5cf | 873 | id = value; |
96729cbd GH |
874 | } else if ((p = strstr(params, ",id=")) != NULL) { |
875 | get_opt_value(value, sizeof(value), p+4); | |
d510c5cf | 876 | id = value; |
96729cbd | 877 | } |
cb77d192 MA |
878 | |
879 | /* | |
880 | * This code doesn't work for defaults && !list->merge_lists: when | |
881 | * params has no id=, and list has an element with !opts->id, it | |
882 | * appends a new element instead of returning the existing opts. | |
883 | * However, we got no use for this case. Guard against possible | |
884 | * (if unlikely) future misuse: | |
885 | */ | |
886 | assert(!defaults || list->merge_lists); | |
6d4cd408 | 887 | opts = qemu_opts_create(list, id, !defaults, &local_err); |
8be7e7e4 | 888 | if (opts == NULL) { |
4f81273d | 889 | error_propagate(errp, local_err); |
96729cbd | 890 | return NULL; |
8be7e7e4 | 891 | } |
96729cbd | 892 | |
d93ae3cf MA |
893 | opts_do_parse(opts, params, firstname, defaults, &local_err); |
894 | if (local_err) { | |
4f81273d | 895 | error_propagate(errp, local_err); |
96729cbd GH |
896 | qemu_opts_del(opts); |
897 | return NULL; | |
898 | } | |
899 | ||
e27c88fe GH |
900 | return opts; |
901 | } | |
902 | ||
4f81273d MA |
903 | /** |
904 | * Create a QemuOpts in @list and with options parsed from @params. | |
905 | * If @permit_abbrev, the first key=value in @params may omit key=, | |
906 | * and is treated as if key was @list->implied_opt_name. | |
70b94331 | 907 | * On error, store an error object through @errp if non-null. |
4f81273d MA |
908 | * Return the new QemuOpts on success, null pointer on error. |
909 | */ | |
4f6dd9af | 910 | QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, |
70b94331 MA |
911 | bool permit_abbrev, Error **errp) |
912 | { | |
913 | return opts_parse(list, params, permit_abbrev, false, errp); | |
914 | } | |
915 | ||
916 | /** | |
917 | * Create a QemuOpts in @list and with options parsed from @params. | |
918 | * If @permit_abbrev, the first key=value in @params may omit key=, | |
919 | * and is treated as if key was @list->implied_opt_name. | |
920 | * Report errors with error_report_err(). This is inappropriate in | |
921 | * QMP context. Do not use this function there! | |
922 | * Return the new QemuOpts on success, null pointer on error. | |
923 | */ | |
924 | QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params, | |
925 | bool permit_abbrev) | |
4f6dd9af | 926 | { |
4f81273d MA |
927 | Error *err = NULL; |
928 | QemuOpts *opts; | |
929 | ||
930 | opts = opts_parse(list, params, permit_abbrev, false, &err); | |
70b94331 MA |
931 | if (err) { |
932 | error_report_err(err); | |
4f81273d MA |
933 | } |
934 | return opts; | |
4f6dd9af JK |
935 | } |
936 | ||
937 | void qemu_opts_set_defaults(QemuOptsList *list, const char *params, | |
938 | int permit_abbrev) | |
939 | { | |
940 | QemuOpts *opts; | |
941 | ||
4f81273d | 942 | opts = opts_parse(list, params, permit_abbrev, true, NULL); |
4f6dd9af JK |
943 | assert(opts); |
944 | } | |
945 | ||
4e89978e LC |
946 | typedef struct OptsFromQDictState { |
947 | QemuOpts *opts; | |
948 | Error **errp; | |
949 | } OptsFromQDictState; | |
950 | ||
01e7f188 MA |
951 | static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque) |
952 | { | |
4e89978e | 953 | OptsFromQDictState *state = opaque; |
01e7f188 MA |
954 | char buf[32]; |
955 | const char *value; | |
956 | int n; | |
957 | ||
2767ceec | 958 | if (!strcmp(key, "id") || *state->errp) { |
01e7f188 MA |
959 | return; |
960 | } | |
961 | ||
962 | switch (qobject_type(obj)) { | |
963 | case QTYPE_QSTRING: | |
964 | value = qstring_get_str(qobject_to_qstring(obj)); | |
965 | break; | |
966 | case QTYPE_QINT: | |
967 | n = snprintf(buf, sizeof(buf), "%" PRId64, | |
968 | qint_get_int(qobject_to_qint(obj))); | |
969 | assert(n < sizeof(buf)); | |
970 | value = buf; | |
971 | break; | |
972 | case QTYPE_QFLOAT: | |
973 | n = snprintf(buf, sizeof(buf), "%.17g", | |
974 | qfloat_get_double(qobject_to_qfloat(obj))); | |
975 | assert(n < sizeof(buf)); | |
976 | value = buf; | |
977 | break; | |
978 | case QTYPE_QBOOL: | |
d35215f8 | 979 | pstrcpy(buf, sizeof(buf), |
fc48ffc3 | 980 | qbool_get_bool(qobject_to_qbool(obj)) ? "on" : "off"); |
01e7f188 MA |
981 | value = buf; |
982 | break; | |
983 | default: | |
984 | return; | |
985 | } | |
4e89978e | 986 | |
f43e47db | 987 | qemu_opt_set(state->opts, key, value, state->errp); |
01e7f188 MA |
988 | } |
989 | ||
990 | /* | |
991 | * Create QemuOpts from a QDict. | |
992 | * Use value of key "id" as ID if it exists and is a QString. | |
993 | * Only QStrings, QInts, QFloats and QBools are copied. Entries with | |
994 | * other types are silently ignored. | |
995 | */ | |
4e89978e LC |
996 | QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict, |
997 | Error **errp) | |
01e7f188 | 998 | { |
4e89978e | 999 | OptsFromQDictState state; |
8be7e7e4 | 1000 | Error *local_err = NULL; |
4e89978e | 1001 | QemuOpts *opts; |
01e7f188 | 1002 | |
8be7e7e4 LC |
1003 | opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1, |
1004 | &local_err); | |
84d18f06 | 1005 | if (local_err) { |
4e89978e | 1006 | error_propagate(errp, local_err); |
01e7f188 | 1007 | return NULL; |
8be7e7e4 | 1008 | } |
01e7f188 | 1009 | |
8be7e7e4 | 1010 | assert(opts != NULL); |
4e89978e LC |
1011 | |
1012 | state.errp = &local_err; | |
1013 | state.opts = opts; | |
1014 | qdict_iter(qdict, qemu_opts_from_qdict_1, &state); | |
84d18f06 | 1015 | if (local_err) { |
4e89978e LC |
1016 | error_propagate(errp, local_err); |
1017 | qemu_opts_del(opts); | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
01e7f188 MA |
1021 | return opts; |
1022 | } | |
1023 | ||
376609cc KW |
1024 | /* |
1025 | * Adds all QDict entries to the QemuOpts that can be added and removes them | |
1026 | * from the QDict. When this function returns, the QDict contains only those | |
1027 | * entries that couldn't be added to the QemuOpts. | |
1028 | */ | |
1029 | void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp) | |
1030 | { | |
1031 | const QDictEntry *entry, *next; | |
1032 | ||
1033 | entry = qdict_first(qdict); | |
1034 | ||
1035 | while (entry != NULL) { | |
1036 | Error *local_err = NULL; | |
1037 | OptsFromQDictState state = { | |
1038 | .errp = &local_err, | |
1039 | .opts = opts, | |
1040 | }; | |
1041 | ||
1042 | next = qdict_next(qdict, entry); | |
1043 | ||
1044 | if (find_desc_by_name(opts->list->desc, entry->key)) { | |
1045 | qemu_opts_from_qdict_1(entry->key, entry->value, &state); | |
84d18f06 | 1046 | if (local_err) { |
376609cc KW |
1047 | error_propagate(errp, local_err); |
1048 | return; | |
1049 | } else { | |
1050 | qdict_del(qdict, entry->key); | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | entry = next; | |
1055 | } | |
1056 | } | |
1057 | ||
01e7f188 MA |
1058 | /* |
1059 | * Convert from QemuOpts to QDict. | |
1060 | * The QDict values are of type QString. | |
1061 | * TODO We'll want to use types appropriate for opt->desc->type, but | |
1062 | * this is enough for now. | |
1063 | */ | |
1064 | QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict) | |
1065 | { | |
1066 | QemuOpt *opt; | |
1067 | QObject *val; | |
1068 | ||
1069 | if (!qdict) { | |
1070 | qdict = qdict_new(); | |
1071 | } | |
1072 | if (opts->id) { | |
1073 | qdict_put(qdict, "id", qstring_from_str(opts->id)); | |
1074 | } | |
1075 | QTAILQ_FOREACH(opt, &opts->head, next) { | |
1076 | val = QOBJECT(qstring_from_str(opt->str)); | |
1077 | qdict_put_obj(qdict, opt->name, val); | |
1078 | } | |
1079 | return qdict; | |
1080 | } | |
1081 | ||
5dc519ef MM |
1082 | /* Validate parsed opts against descriptions where no |
1083 | * descriptions were provided in the QemuOptsList. | |
1084 | */ | |
29952866 | 1085 | void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp) |
5dc519ef MM |
1086 | { |
1087 | QemuOpt *opt; | |
6c519404 | 1088 | Error *local_err = NULL; |
5dc519ef | 1089 | |
db97ceba | 1090 | assert(opts_accepts_any(opts)); |
5dc519ef MM |
1091 | |
1092 | QTAILQ_FOREACH(opt, &opts->head, next) { | |
db97ceba DXW |
1093 | opt->desc = find_desc_by_name(desc, opt->name); |
1094 | if (!opt->desc) { | |
c6bd8c70 | 1095 | error_setg(errp, QERR_INVALID_PARAMETER, opt->name); |
29952866 | 1096 | return; |
5dc519ef MM |
1097 | } |
1098 | ||
6c519404 | 1099 | qemu_opt_parse(opt, &local_err); |
84d18f06 | 1100 | if (local_err) { |
29952866 LC |
1101 | error_propagate(errp, local_err); |
1102 | return; | |
5dc519ef MM |
1103 | } |
1104 | } | |
5dc519ef MM |
1105 | } |
1106 | ||
a4c7367f | 1107 | /** |
28d0de7a | 1108 | * For each member of @list, call @func(@opaque, member, @errp). |
a4c7367f | 1109 | * Call it with the current location temporarily set to the member's. |
28d0de7a | 1110 | * @func() may store an Error through @errp, but must return non-zero then. |
a4c7367f MA |
1111 | * When @func() returns non-zero, break the loop and return that value. |
1112 | * Return zero when the loop completes. | |
1113 | */ | |
1114 | int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, | |
28d0de7a | 1115 | void *opaque, Error **errp) |
e27c88fe | 1116 | { |
827b0813 | 1117 | Location loc; |
e27c88fe | 1118 | QemuOpts *opts; |
37f32349 | 1119 | int rc = 0; |
e27c88fe | 1120 | |
827b0813 | 1121 | loc_push_none(&loc); |
72cf2d4f | 1122 | QTAILQ_FOREACH(opts, &list->head, next) { |
827b0813 | 1123 | loc_restore(&opts->loc); |
28d0de7a | 1124 | rc = func(opaque, opts, errp); |
a4c7367f | 1125 | if (rc) { |
37f32349 | 1126 | break; |
a4c7367f | 1127 | } |
28d0de7a | 1128 | assert(!errp || !*errp); |
e27c88fe | 1129 | } |
827b0813 | 1130 | loc_pop(&loc); |
37f32349 | 1131 | return rc; |
e27c88fe | 1132 | } |
8559e45e CL |
1133 | |
1134 | static size_t count_opts_list(QemuOptsList *list) | |
1135 | { | |
1136 | QemuOptDesc *desc = NULL; | |
1137 | size_t num_opts = 0; | |
1138 | ||
1139 | if (!list) { | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | desc = list->desc; | |
1144 | while (desc && desc->name) { | |
1145 | num_opts++; | |
1146 | desc++; | |
1147 | } | |
1148 | ||
1149 | return num_opts; | |
1150 | } | |
1151 | ||
8559e45e CL |
1152 | void qemu_opts_free(QemuOptsList *list) |
1153 | { | |
8559e45e CL |
1154 | g_free(list); |
1155 | } | |
a1097a26 | 1156 | |
c282e1fd CL |
1157 | /* Realloc dst option list and append options from an option list (list) |
1158 | * to it. dst could be NULL or a malloced list. | |
98d896d9 CL |
1159 | * The lifetime of dst must be shorter than the input list because the |
1160 | * QemuOptDesc->name, ->help, and ->def_value_str strings are shared. | |
a1097a26 CL |
1161 | */ |
1162 | QemuOptsList *qemu_opts_append(QemuOptsList *dst, | |
c282e1fd | 1163 | QemuOptsList *list) |
a1097a26 CL |
1164 | { |
1165 | size_t num_opts, num_dst_opts; | |
1166 | QemuOptDesc *desc; | |
1167 | bool need_init = false; | |
a7607150 | 1168 | bool need_head_update; |
a1097a26 | 1169 | |
c282e1fd | 1170 | if (!list) { |
a1097a26 CL |
1171 | return dst; |
1172 | } | |
1173 | ||
a1097a26 CL |
1174 | /* If dst is NULL, after realloc, some area of dst should be initialized |
1175 | * before adding options to it. | |
1176 | */ | |
1177 | if (!dst) { | |
1178 | need_init = true; | |
a7607150 MP |
1179 | need_head_update = true; |
1180 | } else { | |
1181 | /* Moreover, even if dst is not NULL, the realloc may move it to a | |
1182 | * different address in which case we may get a stale tail pointer | |
1183 | * in dst->head. */ | |
1184 | need_head_update = QTAILQ_EMPTY(&dst->head); | |
a1097a26 CL |
1185 | } |
1186 | ||
1187 | num_opts = count_opts_list(dst); | |
1188 | num_dst_opts = num_opts; | |
1189 | num_opts += count_opts_list(list); | |
1190 | dst = g_realloc(dst, sizeof(QemuOptsList) + | |
1191 | (num_opts + 1) * sizeof(QemuOptDesc)); | |
1192 | if (need_init) { | |
1193 | dst->name = NULL; | |
1194 | dst->implied_opt_name = NULL; | |
a1097a26 CL |
1195 | dst->merge_lists = false; |
1196 | } | |
a7607150 MP |
1197 | if (need_head_update) { |
1198 | QTAILQ_INIT(&dst->head); | |
1199 | } | |
a1097a26 CL |
1200 | dst->desc[num_dst_opts].name = NULL; |
1201 | ||
a1097a26 CL |
1202 | /* append list->desc to dst->desc */ |
1203 | if (list) { | |
1204 | desc = list->desc; | |
1205 | while (desc && desc->name) { | |
1206 | if (find_desc_by_name(dst->desc, desc->name) == NULL) { | |
98d896d9 | 1207 | dst->desc[num_dst_opts++] = *desc; |
a1097a26 CL |
1208 | dst->desc[num_dst_opts].name = NULL; |
1209 | } | |
1210 | desc++; | |
1211 | } | |
1212 | } | |
1213 | ||
a1097a26 CL |
1214 | return dst; |
1215 | } |