2 * Commandline option parsing functions
4 * Copyright (c) 2003-2008 Fabrice Bellard
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:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
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
26 #include "qemu/osdep.h"
28 #include "qapi/error.h"
29 #include "qemu-common.h"
30 #include "qemu/error-report.h"
31 #include "qapi/qmp/qbool.h"
32 #include "qapi/qmp/qdict.h"
33 #include "qapi/qmp/qnum.h"
34 #include "qapi/qmp/qstring.h"
35 #include "qapi/qmp/qerror.h"
36 #include "qemu/option_int.h"
37 #include "qemu/cutils.h"
39 #include "qemu/help_option.h"
42 * Extracts the name of an option from the parameter string (p points at the
43 * first byte of the option name)
45 * The option name is delimited by delim (usually , or =) or the string end
46 * and is copied into option. The caller is responsible for free'ing option
47 * when no longer required.
49 * The return value is the position of the delimiter/zero byte after the option
52 static const char *get_opt_name(const char *p, char **option, char delim)
54 char *offset = strchr(p, delim);
57 *option = g_strndup(p, offset - p);
60 *option = g_strdup(p);
66 * Extracts the value of an option from the parameter string p (p points at the
67 * first byte of the option value)
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.
73 const char *get_opt_value(const char *p, char **value)
75 size_t capacity = 0, length;
80 offset = qemu_strchrnul(p, ',');
82 if (*offset != '\0' && *(offset + 1) == ',') {
86 *value = g_renew(char, *value, capacity + length + 1);
87 strncpy(*value + capacity, p, length);
88 (*value)[capacity + length] = '\0';
91 if (*offset == '\0' ||
92 *(offset + 1) != ',') {
96 p += (offset - p) + 2;
102 static void parse_option_bool(const char *name, const char *value, bool *ret,
105 if (!strcmp(value, "on")) {
107 } else if (!strcmp(value, "off")) {
110 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
111 name, "'on' or 'off'");
115 static void parse_option_number(const char *name, const char *value,
116 uint64_t *ret, Error **errp)
121 err = qemu_strtou64(value, NULL, 0, &number);
122 if (err == -ERANGE) {
123 error_setg(errp, "Value '%s' is too large for parameter '%s'",
128 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
134 static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
139 for (i = 0; desc[i].name != NULL; i++) {
140 if (strcmp(desc[i].name, name) == 0) {
148 void parse_option_size(const char *name, const char *value,
149 uint64_t *ret, Error **errp)
154 err = qemu_strtosz(value, NULL, &size);
155 if (err == -ERANGE) {
156 error_setg(errp, "Value '%s' is out of range for parameter '%s'",
161 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
162 "a non-negative number below 2^64");
163 error_append_hint(errp, "Optional suffix k, M, G, T, P or E means"
164 " kilo-, mega-, giga-, tera-, peta-\n"
165 "and exabytes, respectively.\n");
171 bool has_help_option(const char *param)
173 const char *p = param;
176 while (*p && !result) {
179 p = get_opt_value(p, &value);
184 result = is_help_option(value);
191 bool is_valid_option_list(const char *p)
197 p = get_opt_value(p, &value);
199 (!*value || *value == ',')) {
213 void qemu_opts_print_help(QemuOptsList *list)
219 while (desc && desc->name) {
220 printf("%-16s %s\n", desc->name,
221 desc->help ? desc->help : "No description available");
225 /* ------------------------------------------------------------------ */
227 QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
231 QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
232 if (strcmp(opt->name, name) != 0)
239 static void qemu_opt_del(QemuOpt *opt)
241 QTAILQ_REMOVE(&opt->opts->head, opt, next);
247 /* qemu_opt_set allows many settings for the same option.
248 * This function deletes all settings for an option.
250 static void qemu_opt_del_all(QemuOpts *opts, const char *name)
252 QemuOpt *opt, *next_opt;
254 QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) {
255 if (!strcmp(opt->name, name)) {
261 const char *qemu_opt_get(QemuOpts *opts, const char *name)
269 opt = qemu_opt_find(opts, name);
271 const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
272 if (desc && desc->def_value_str) {
273 return desc->def_value_str;
276 return opt ? opt->str : NULL;
279 void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name)
282 iter->opt = QTAILQ_FIRST(&opts->head);
286 const char *qemu_opt_iter_next(QemuOptsIter *iter)
288 QemuOpt *ret = iter->opt;
290 while (ret && !g_str_equal(iter->name, ret->name)) {
291 ret = QTAILQ_NEXT(ret, next);
294 iter->opt = ret ? QTAILQ_NEXT(ret, next) : NULL;
295 return ret ? ret->str : NULL;
298 /* Get a known option (or its default) and remove it from the list
299 * all in one action. Return a malloced string of the option value.
300 * Result must be freed by caller with g_free().
302 char *qemu_opt_get_del(QemuOpts *opts, const char *name)
305 const QemuOptDesc *desc;
312 opt = qemu_opt_find(opts, name);
314 desc = find_desc_by_name(opts->list->desc, name);
315 if (desc && desc->def_value_str) {
316 str = g_strdup(desc->def_value_str);
322 qemu_opt_del_all(opts, name);
326 bool qemu_opt_has_help_opt(QemuOpts *opts)
330 QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
331 if (is_help_option(opt->name)) {
338 static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name,
339 bool defval, bool del)
348 opt = qemu_opt_find(opts, name);
350 const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
351 if (desc && desc->def_value_str) {
352 parse_option_bool(name, desc->def_value_str, &ret, &error_abort);
356 assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL);
357 ret = opt->value.boolean;
359 qemu_opt_del_all(opts, name);
364 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
366 return qemu_opt_get_bool_helper(opts, name, defval, false);
369 bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval)
371 return qemu_opt_get_bool_helper(opts, name, defval, true);
374 static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name,
375 uint64_t defval, bool del)
378 uint64_t ret = defval;
384 opt = qemu_opt_find(opts, name);
386 const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
387 if (desc && desc->def_value_str) {
388 parse_option_number(name, desc->def_value_str, &ret, &error_abort);
392 assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER);
393 ret = opt->value.uint;
395 qemu_opt_del_all(opts, name);
400 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
402 return qemu_opt_get_number_helper(opts, name, defval, false);
405 uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
408 return qemu_opt_get_number_helper(opts, name, defval, true);
411 static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name,
412 uint64_t defval, bool del)
415 uint64_t ret = defval;
421 opt = qemu_opt_find(opts, name);
423 const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
424 if (desc && desc->def_value_str) {
425 parse_option_size(name, desc->def_value_str, &ret, &error_abort);
429 assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE);
430 ret = opt->value.uint;
432 qemu_opt_del_all(opts, name);
437 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
439 return qemu_opt_get_size_helper(opts, name, defval, false);
442 uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
445 return qemu_opt_get_size_helper(opts, name, defval, true);
448 static void qemu_opt_parse(QemuOpt *opt, Error **errp)
450 if (opt->desc == NULL)
453 switch (opt->desc->type) {
454 case QEMU_OPT_STRING:
458 parse_option_bool(opt->name, opt->str, &opt->value.boolean, errp);
460 case QEMU_OPT_NUMBER:
461 parse_option_number(opt->name, opt->str, &opt->value.uint, errp);
464 parse_option_size(opt->name, opt->str, &opt->value.uint, errp);
471 static bool opts_accepts_any(const QemuOpts *opts)
473 return opts->list->desc[0].name == NULL;
476 int qemu_opt_unset(QemuOpts *opts, const char *name)
478 QemuOpt *opt = qemu_opt_find(opts, name);
480 assert(opts_accepts_any(opts));
490 static void opt_set(QemuOpts *opts, const char *name, char *value,
491 bool prepend, Error **errp)
494 const QemuOptDesc *desc;
495 Error *local_err = NULL;
497 desc = find_desc_by_name(opts->list->desc, name);
498 if (!desc && !opts_accepts_any(opts)) {
500 error_setg(errp, QERR_INVALID_PARAMETER, name);
504 opt = g_malloc0(sizeof(*opt));
505 opt->name = g_strdup(name);
508 QTAILQ_INSERT_HEAD(&opts->head, opt, next);
510 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
514 qemu_opt_parse(opt, &local_err);
516 error_propagate(errp, local_err);
521 void qemu_opt_set(QemuOpts *opts, const char *name, const char *value,
524 opt_set(opts, name, g_strdup(value), false, errp);
527 void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val,
531 const QemuOptDesc *desc = opts->list->desc;
533 opt = g_malloc0(sizeof(*opt));
534 opt->desc = find_desc_by_name(desc, name);
535 if (!opt->desc && !opts_accepts_any(opts)) {
536 error_setg(errp, QERR_INVALID_PARAMETER, name);
541 opt->name = g_strdup(name);
543 opt->value.boolean = !!val;
544 opt->str = g_strdup(val ? "on" : "off");
545 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
548 void qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val,
552 const QemuOptDesc *desc = opts->list->desc;
554 opt = g_malloc0(sizeof(*opt));
555 opt->desc = find_desc_by_name(desc, name);
556 if (!opt->desc && !opts_accepts_any(opts)) {
557 error_setg(errp, QERR_INVALID_PARAMETER, name);
562 opt->name = g_strdup(name);
564 opt->value.uint = val;
565 opt->str = g_strdup_printf("%" PRId64, val);
566 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
570 * For each member of @opts, call @func(@opaque, name, value, @errp).
571 * @func() may store an Error through @errp, but must return non-zero then.
572 * When @func() returns non-zero, break the loop and return that value.
573 * Return zero when the loop completes.
575 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
581 QTAILQ_FOREACH(opt, &opts->head, next) {
582 rc = func(opaque, opt->name, opt->str, errp);
586 assert(!errp || !*errp);
591 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
595 QTAILQ_FOREACH(opts, &list->head, next) {
596 if (!opts->id && !id) {
599 if (opts->id && id && !strcmp(opts->id, id)) {
606 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
607 int fail_if_exists, Error **errp)
609 QemuOpts *opts = NULL;
612 if (!id_wellformed(id)) {
613 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id",
615 error_append_hint(errp, "Identifiers consist of letters, digits, "
616 "'-', '.', '_', starting with a letter.\n");
619 opts = qemu_opts_find(list, id);
621 if (fail_if_exists && !list->merge_lists) {
622 error_setg(errp, "Duplicate ID '%s' for %s", id, list->name);
628 } else if (list->merge_lists) {
629 opts = qemu_opts_find(list, NULL);
634 opts = g_malloc0(sizeof(*opts));
635 opts->id = g_strdup(id);
637 loc_save(&opts->loc);
638 QTAILQ_INIT(&opts->head);
639 QTAILQ_INSERT_TAIL(&list->head, opts, next);
643 void qemu_opts_reset(QemuOptsList *list)
645 QemuOpts *opts, *next_opts;
647 QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) {
652 void qemu_opts_loc_restore(QemuOpts *opts)
654 loc_restore(&opts->loc);
657 void qemu_opts_set(QemuOptsList *list, const char *id,
658 const char *name, const char *value, Error **errp)
661 Error *local_err = NULL;
663 opts = qemu_opts_create(list, id, 1, &local_err);
665 error_propagate(errp, local_err);
668 qemu_opt_set(opts, name, value, errp);
671 const char *qemu_opts_id(QemuOpts *opts)
676 /* The id string will be g_free()d by qemu_opts_del */
677 void qemu_opts_set_id(QemuOpts *opts, char *id)
682 void qemu_opts_del(QemuOpts *opts)
691 opt = QTAILQ_FIRST(&opts->head);
696 QTAILQ_REMOVE(&opts->list->head, opts, next);
701 /* print value, escaping any commas in value */
702 static void escaped_print(const char *value)
706 for (ptr = value; *ptr; ++ptr) {
714 void qemu_opts_print(QemuOpts *opts, const char *separator)
717 QemuOptDesc *desc = opts->list->desc;
718 const char *sep = "";
721 printf("id=%s", opts->id); /* passed id_wellformed -> no commas */
725 if (desc[0].name == NULL) {
726 QTAILQ_FOREACH(opt, &opts->head, next) {
727 printf("%s%s=", sep, opt->name);
728 escaped_print(opt->str);
733 for (; desc && desc->name; desc++) {
735 opt = qemu_opt_find(opts, desc->name);
737 value = opt ? opt->str : desc->def_value_str;
741 if (desc->type == QEMU_OPT_STRING) {
742 printf("%s%s=", sep, desc->name);
743 escaped_print(value);
744 } else if ((desc->type == QEMU_OPT_SIZE ||
745 desc->type == QEMU_OPT_NUMBER) && opt) {
746 printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint);
748 printf("%s%s=%s", sep, desc->name, value);
754 static void opts_do_parse(QemuOpts *opts, const char *params,
755 const char *firstname, bool prepend, Error **errp)
759 const char *p,*pe,*pc;
760 Error *local_err = NULL;
762 for (p = params; *p != '\0'; p++) {
765 if (!pe || (pc && pc < pe)) {
766 /* found "foo,more" */
767 if (p == params && firstname) {
768 /* implicitly named first option */
769 option = g_strdup(firstname);
770 p = get_opt_value(p, &value);
772 /* option without value, probably a flag */
773 p = get_opt_name(p, &option, ',');
774 if (strncmp(option, "no", 2) == 0) {
775 memmove(option, option+2, strlen(option+2)+1);
776 value = g_strdup("off");
778 value = g_strdup("on");
782 /* found "foo=bar,more" */
783 p = get_opt_name(p, &option, '=');
786 p = get_opt_value(p, &value);
788 if (strcmp(option, "id") != 0) {
789 /* store and parse */
790 opt_set(opts, option, value, prepend, &local_err);
793 error_propagate(errp, local_err);
802 option = value = NULL;
811 * Store options parsed from @params into @opts.
812 * If @firstname is non-null, the first key=value in @params may omit
813 * key=, and is treated as if key was @firstname.
814 * On error, store an error object through @errp if non-null.
816 void qemu_opts_do_parse(QemuOpts *opts, const char *params,
817 const char *firstname, Error **errp)
819 opts_do_parse(opts, params, firstname, false, errp);
822 static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
823 bool permit_abbrev, bool defaults, Error **errp)
825 const char *firstname;
829 Error *local_err = NULL;
831 assert(!permit_abbrev || list->implied_opt_name);
832 firstname = permit_abbrev ? list->implied_opt_name : NULL;
834 if (strncmp(params, "id=", 3) == 0) {
835 get_opt_value(params + 3, &id);
836 } else if ((p = strstr(params, ",id=")) != NULL) {
837 get_opt_value(p + 4, &id);
841 * This code doesn't work for defaults && !list->merge_lists: when
842 * params has no id=, and list has an element with !opts->id, it
843 * appends a new element instead of returning the existing opts.
844 * However, we got no use for this case. Guard against possible
845 * (if unlikely) future misuse:
847 assert(!defaults || list->merge_lists);
848 opts = qemu_opts_create(list, id, !defaults, &local_err);
851 error_propagate(errp, local_err);
855 opts_do_parse(opts, params, firstname, defaults, &local_err);
857 error_propagate(errp, local_err);
866 * Create a QemuOpts in @list and with options parsed from @params.
867 * If @permit_abbrev, the first key=value in @params may omit key=,
868 * and is treated as if key was @list->implied_opt_name.
869 * On error, store an error object through @errp if non-null.
870 * Return the new QemuOpts on success, null pointer on error.
872 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
873 bool permit_abbrev, Error **errp)
875 return opts_parse(list, params, permit_abbrev, false, errp);
879 * Create a QemuOpts in @list and with options parsed from @params.
880 * If @permit_abbrev, the first key=value in @params may omit key=,
881 * and is treated as if key was @list->implied_opt_name.
882 * Report errors with error_report_err(). This is inappropriate in
883 * QMP context. Do not use this function there!
884 * Return the new QemuOpts on success, null pointer on error.
886 QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params,
892 opts = opts_parse(list, params, permit_abbrev, false, &err);
894 error_report_err(err);
899 void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
904 opts = opts_parse(list, params, permit_abbrev, true, NULL);
908 typedef struct OptsFromQDictState {
911 } OptsFromQDictState;
913 static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque)
915 OptsFromQDictState *state = opaque;
916 char buf[32], *tmp = NULL;
919 if (!strcmp(key, "id") || *state->errp) {
923 switch (qobject_type(obj)) {
925 value = qstring_get_str(qobject_to(QString, obj));
928 tmp = qnum_to_string(qobject_to(QNum, obj));
932 pstrcpy(buf, sizeof(buf),
933 qbool_get_bool(qobject_to(QBool, obj)) ? "on" : "off");
940 qemu_opt_set(state->opts, key, value, state->errp);
945 * Create QemuOpts from a QDict.
946 * Use value of key "id" as ID if it exists and is a QString. Only
947 * QStrings, QNums and QBools are copied. Entries with other types
948 * are silently ignored.
950 QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict,
953 OptsFromQDictState state;
954 Error *local_err = NULL;
957 opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1,
960 error_propagate(errp, local_err);
964 assert(opts != NULL);
966 state.errp = &local_err;
968 qdict_iter(qdict, qemu_opts_from_qdict_1, &state);
970 error_propagate(errp, local_err);
979 * Adds all QDict entries to the QemuOpts that can be added and removes them
980 * from the QDict. When this function returns, the QDict contains only those
981 * entries that couldn't be added to the QemuOpts.
983 void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp)
985 const QDictEntry *entry, *next;
987 entry = qdict_first(qdict);
989 while (entry != NULL) {
990 Error *local_err = NULL;
991 OptsFromQDictState state = {
996 next = qdict_next(qdict, entry);
998 if (find_desc_by_name(opts->list->desc, entry->key)) {
999 qemu_opts_from_qdict_1(entry->key, entry->value, &state);
1001 error_propagate(errp, local_err);
1004 qdict_del(qdict, entry->key);
1013 * Convert from QemuOpts to QDict. The QDict values are of type QString.
1015 * If @list is given, only add those options to the QDict that are contained in
1016 * the list. If @del is true, any options added to the QDict are removed from
1017 * the QemuOpts, otherwise they remain there.
1019 * If two options in @opts have the same name, they are processed in order
1020 * so that the last one wins (consistent with the reverse iteration in
1021 * qemu_opt_find()), but all of them are deleted if @del is true.
1023 * TODO We'll want to use types appropriate for opt->desc->type, but
1024 * this is enough for now.
1026 QDict *qemu_opts_to_qdict_filtered(QemuOpts *opts, QDict *qdict,
1027 QemuOptsList *list, bool del)
1029 QemuOpt *opt, *next;
1032 qdict = qdict_new();
1035 qdict_put_str(qdict, "id", opts->id);
1037 QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next) {
1041 for (desc = list->desc; desc->name; desc++) {
1042 if (!strcmp(desc->name, opt->name)) {
1051 qdict_put_str(qdict, opt->name, opt->str);
1059 /* Copy all options in a QemuOpts to the given QDict. See
1060 * qemu_opts_to_qdict_filtered() for details. */
1061 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict)
1063 return qemu_opts_to_qdict_filtered(opts, qdict, NULL, false);
1066 /* Validate parsed opts against descriptions where no
1067 * descriptions were provided in the QemuOptsList.
1069 void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp)
1072 Error *local_err = NULL;
1074 assert(opts_accepts_any(opts));
1076 QTAILQ_FOREACH(opt, &opts->head, next) {
1077 opt->desc = find_desc_by_name(desc, opt->name);
1079 error_setg(errp, QERR_INVALID_PARAMETER, opt->name);
1083 qemu_opt_parse(opt, &local_err);
1085 error_propagate(errp, local_err);
1092 * For each member of @list, call @func(@opaque, member, @errp).
1093 * Call it with the current location temporarily set to the member's.
1094 * @func() may store an Error through @errp, but must return non-zero then.
1095 * When @func() returns non-zero, break the loop and return that value.
1096 * Return zero when the loop completes.
1098 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func,
1099 void *opaque, Error **errp)
1105 loc_push_none(&loc);
1106 QTAILQ_FOREACH(opts, &list->head, next) {
1107 loc_restore(&opts->loc);
1108 rc = func(opaque, opts, errp);
1112 assert(!errp || !*errp);
1118 static size_t count_opts_list(QemuOptsList *list)
1120 QemuOptDesc *desc = NULL;
1121 size_t num_opts = 0;
1128 while (desc && desc->name) {
1136 void qemu_opts_free(QemuOptsList *list)
1141 /* Realloc dst option list and append options from an option list (list)
1142 * to it. dst could be NULL or a malloced list.
1143 * The lifetime of dst must be shorter than the input list because the
1144 * QemuOptDesc->name, ->help, and ->def_value_str strings are shared.
1146 QemuOptsList *qemu_opts_append(QemuOptsList *dst,
1149 size_t num_opts, num_dst_opts;
1151 bool need_init = false;
1152 bool need_head_update;
1158 /* If dst is NULL, after realloc, some area of dst should be initialized
1159 * before adding options to it.
1163 need_head_update = true;
1165 /* Moreover, even if dst is not NULL, the realloc may move it to a
1166 * different address in which case we may get a stale tail pointer
1168 need_head_update = QTAILQ_EMPTY(&dst->head);
1171 num_opts = count_opts_list(dst);
1172 num_dst_opts = num_opts;
1173 num_opts += count_opts_list(list);
1174 dst = g_realloc(dst, sizeof(QemuOptsList) +
1175 (num_opts + 1) * sizeof(QemuOptDesc));
1178 dst->implied_opt_name = NULL;
1179 dst->merge_lists = false;
1181 if (need_head_update) {
1182 QTAILQ_INIT(&dst->head);
1184 dst->desc[num_dst_opts].name = NULL;
1186 /* append list->desc to dst->desc */
1189 while (desc && desc->name) {
1190 if (find_desc_by_name(dst->desc, desc->name) == NULL) {
1191 dst->desc[num_dst_opts++] = *desc;
1192 dst->desc[num_dst_opts].name = NULL;