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/error-report.h"
30 #include "qapi/qmp/qbool.h"
31 #include "qapi/qmp/qdict.h"
32 #include "qapi/qmp/qnum.h"
33 #include "qapi/qmp/qstring.h"
34 #include "qapi/qmp/qerror.h"
35 #include "qemu/option_int.h"
36 #include "qemu/cutils.h"
38 #include "qemu/help_option.h"
41 * Extracts the name of an option from the parameter string (@p points at the
42 * first byte of the option name)
44 * The option name is @len characters long and is copied into @option. The
45 * caller is responsible for free'ing @option when no longer required.
47 * The return value is the position of the delimiter/zero byte after the option
50 static const char *get_opt_name(const char *p, char **option, size_t len)
52 *option = g_strndup(p, len);
57 * Extracts the value of an option from the parameter string p (p points at the
58 * first byte of the option value)
60 * This function is comparable to get_opt_name with the difference that the
61 * delimiter is fixed to be comma which starts a new option. To specify an
62 * option value that contains commas, double each comma.
64 const char *get_opt_value(const char *p, char **value)
66 size_t capacity = 0, length;
71 offset = qemu_strchrnul(p, ',');
73 if (*offset != '\0' && *(offset + 1) == ',') {
76 *value = g_renew(char, *value, capacity + length + 1);
77 strncpy(*value + capacity, p, length);
78 (*value)[capacity + length] = '\0';
80 if (*offset == '\0' ||
81 *(offset + 1) != ',') {
85 p += (offset - p) + 2;
91 static bool parse_option_number(const char *name, const char *value,
92 uint64_t *ret, Error **errp)
97 err = qemu_strtou64(value, NULL, 0, &number);
99 error_setg(errp, "Value '%s' is too large for parameter '%s'",
104 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
111 static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
116 for (i = 0; desc[i].name != NULL; i++) {
117 if (strcmp(desc[i].name, name) == 0) {
125 static const char *find_default_by_name(QemuOpts *opts, const char *name)
127 const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
129 return desc ? desc->def_value_str : NULL;
132 bool parse_option_size(const char *name, const char *value,
133 uint64_t *ret, Error **errp)
138 err = qemu_strtosz(value, NULL, &size);
139 if (err == -ERANGE) {
140 error_setg(errp, "Value '%s' is out of range for parameter '%s'",
145 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
146 "a non-negative number below 2^64");
147 error_append_hint(errp, "Optional suffix k, M, G, T, P or E means"
148 " kilo-, mega-, giga-, tera-, peta-\n"
149 "and exabytes, respectively.\n");
156 static const char *opt_type_to_string(enum QemuOptType type)
159 case QEMU_OPT_STRING:
162 return "bool (on/off)";
163 case QEMU_OPT_NUMBER:
169 g_assert_not_reached();
173 * Print the list of options available in the given list. If
174 * @print_caption is true, a caption (including the list name, if it
175 * exists) is printed. The options itself will be indented, so
176 * @print_caption should only be set to false if the caller prints its
177 * own custom caption (so that the indentation makes sense).
179 void qemu_opts_print_help(QemuOptsList *list, bool print_caption)
183 GPtrArray *array = g_ptr_array_new();
187 while (desc && desc->name) {
188 GString *str = g_string_new(NULL);
189 g_string_append_printf(str, " %s=<%s>", desc->name,
190 opt_type_to_string(desc->type));
193 g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
195 g_string_append_printf(str, " - %s", desc->help);
197 g_ptr_array_add(array, g_string_free(str, false));
201 g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
202 if (print_caption && array->len > 0) {
204 printf("%s options:\n", list->name);
206 printf("Options:\n");
208 } else if (array->len == 0) {
210 printf("There are no options for %s.\n", list->name);
212 printf("No options available.\n");
215 for (i = 0; i < array->len; i++) {
216 printf("%s\n", (char *)array->pdata[i]);
218 g_ptr_array_set_free_func(array, g_free);
219 g_ptr_array_free(array, true);
222 /* ------------------------------------------------------------------ */
224 QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
228 QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
229 if (strcmp(opt->name, name) != 0)
236 static void qemu_opt_del(QemuOpt *opt)
238 QTAILQ_REMOVE(&opt->opts->head, opt, next);
244 /* qemu_opt_set allows many settings for the same option.
245 * This function deletes all settings for an option.
247 static void qemu_opt_del_all(QemuOpts *opts, const char *name)
249 QemuOpt *opt, *next_opt;
251 QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) {
252 if (!strcmp(opt->name, name)) {
258 const char *qemu_opt_get(QemuOpts *opts, const char *name)
266 opt = qemu_opt_find(opts, name);
268 return find_default_by_name(opts, name);
274 void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name)
277 iter->opt = QTAILQ_FIRST(&opts->head);
281 const char *qemu_opt_iter_next(QemuOptsIter *iter)
283 QemuOpt *ret = iter->opt;
285 while (ret && !g_str_equal(iter->name, ret->name)) {
286 ret = QTAILQ_NEXT(ret, next);
289 iter->opt = ret ? QTAILQ_NEXT(ret, next) : NULL;
290 return ret ? ret->str : NULL;
293 /* Get a known option (or its default) and remove it from the list
294 * all in one action. Return a malloced string of the option value.
295 * Result must be freed by caller with g_free().
297 char *qemu_opt_get_del(QemuOpts *opts, const char *name)
306 opt = qemu_opt_find(opts, name);
308 return g_strdup(find_default_by_name(opts, name));
312 qemu_opt_del_all(opts, name);
316 bool qemu_opt_has_help_opt(QemuOpts *opts)
320 QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
321 if (is_help_option(opt->name)) {
328 static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name,
329 bool defval, bool del)
339 opt = qemu_opt_find(opts, name);
341 def_val = find_default_by_name(opts, name);
343 qapi_bool_parse(name, def_val, &ret, &error_abort);
347 assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL);
348 ret = opt->value.boolean;
350 qemu_opt_del_all(opts, name);
355 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
357 return qemu_opt_get_bool_helper(opts, name, defval, false);
360 bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval)
362 return qemu_opt_get_bool_helper(opts, name, defval, true);
365 static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name,
366 uint64_t defval, bool del)
370 uint64_t ret = defval;
376 opt = qemu_opt_find(opts, name);
378 def_val = find_default_by_name(opts, name);
380 parse_option_number(name, def_val, &ret, &error_abort);
384 assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER);
385 ret = opt->value.uint;
387 qemu_opt_del_all(opts, name);
392 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
394 return qemu_opt_get_number_helper(opts, name, defval, false);
397 uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
400 return qemu_opt_get_number_helper(opts, name, defval, true);
403 static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name,
404 uint64_t defval, bool del)
408 uint64_t ret = defval;
414 opt = qemu_opt_find(opts, name);
416 def_val = find_default_by_name(opts, name);
418 parse_option_size(name, def_val, &ret, &error_abort);
422 assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE);
423 ret = opt->value.uint;
425 qemu_opt_del_all(opts, name);
430 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
432 return qemu_opt_get_size_helper(opts, name, defval, false);
435 uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
438 return qemu_opt_get_size_helper(opts, name, defval, true);
441 static bool qemu_opt_parse(QemuOpt *opt, Error **errp)
443 if (opt->desc == NULL)
446 switch (opt->desc->type) {
447 case QEMU_OPT_STRING:
451 return qapi_bool_parse(opt->name, opt->str, &opt->value.boolean, errp);
452 case QEMU_OPT_NUMBER:
453 return parse_option_number(opt->name, opt->str, &opt->value.uint,
456 return parse_option_size(opt->name, opt->str, &opt->value.uint,
463 static bool opts_accepts_any(const QemuOptsList *list)
465 return list->desc[0].name == NULL;
468 int qemu_opt_unset(QemuOpts *opts, const char *name)
470 QemuOpt *opt = qemu_opt_find(opts, name);
472 assert(opts_accepts_any(opts->list));
482 static QemuOpt *opt_create(QemuOpts *opts, const char *name, char *value)
484 QemuOpt *opt = g_malloc0(sizeof(*opt));
486 opt->name = g_strdup(name);
489 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
494 static bool opt_validate(QemuOpt *opt, Error **errp)
496 const QemuOptDesc *desc;
497 const QemuOptsList *list = opt->opts->list;
499 desc = find_desc_by_name(list->desc, opt->name);
500 if (!desc && !opts_accepts_any(list)) {
501 error_setg(errp, QERR_INVALID_PARAMETER, opt->name);
506 if (!qemu_opt_parse(opt, errp)) {
513 bool qemu_opt_set(QemuOpts *opts, const char *name, const char *value,
516 QemuOpt *opt = opt_create(opts, name, g_strdup(value));
518 if (!opt_validate(opt, errp)) {
525 bool qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val,
529 const QemuOptDesc *desc;
530 const QemuOptsList *list = opts->list;
532 desc = find_desc_by_name(list->desc, name);
533 if (!desc && !opts_accepts_any(list)) {
534 error_setg(errp, QERR_INVALID_PARAMETER, name);
538 opt = g_malloc0(sizeof(*opt));
539 opt->name = g_strdup(name);
542 opt->value.boolean = !!val;
543 opt->str = g_strdup(val ? "on" : "off");
544 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
548 bool qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val,
552 const QemuOptDesc *desc;
553 const QemuOptsList *list = opts->list;
555 desc = find_desc_by_name(list->desc, name);
556 if (!desc && !opts_accepts_any(list)) {
557 error_setg(errp, QERR_INVALID_PARAMETER, name);
561 opt = g_malloc0(sizeof(*opt));
562 opt->name = g_strdup(name);
565 opt->value.uint = val;
566 opt->str = g_strdup_printf("%" PRId64, val);
567 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
572 * For each member of @opts, call @func(@opaque, name, value, @errp).
573 * @func() may store an Error through @errp, but must return non-zero then.
574 * When @func() returns non-zero, break the loop and return that value.
575 * Return zero when the loop completes.
577 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
583 QTAILQ_FOREACH(opt, &opts->head, next) {
584 rc = func(opaque, opt->name, opt->str, errp);
588 assert(!errp || !*errp);
593 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
597 QTAILQ_FOREACH(opts, &list->head, next) {
598 if (!opts->id && !id) {
601 if (opts->id && id && !strcmp(opts->id, id)) {
608 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
609 int fail_if_exists, Error **errp)
611 QemuOpts *opts = NULL;
613 if (list->merge_lists) {
615 error_setg(errp, QERR_INVALID_PARAMETER, "id");
618 opts = qemu_opts_find(list, NULL);
623 assert(fail_if_exists);
624 if (!id_wellformed(id)) {
625 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id",
627 error_append_hint(errp, "Identifiers consist of letters, digits, "
628 "'-', '.', '_', starting with a letter.\n");
631 opts = qemu_opts_find(list, id);
633 error_setg(errp, "Duplicate ID '%s' for %s", id, list->name);
637 opts = g_malloc0(sizeof(*opts));
638 opts->id = g_strdup(id);
640 loc_save(&opts->loc);
641 QTAILQ_INIT(&opts->head);
642 QTAILQ_INSERT_TAIL(&list->head, opts, next);
646 void qemu_opts_reset(QemuOptsList *list)
648 QemuOpts *opts, *next_opts;
650 QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) {
655 void qemu_opts_loc_restore(QemuOpts *opts)
657 loc_restore(&opts->loc);
660 const char *qemu_opts_id(QemuOpts *opts)
665 /* The id string will be g_free()d by qemu_opts_del */
666 void qemu_opts_set_id(QemuOpts *opts, char *id)
671 void qemu_opts_del(QemuOpts *opts)
680 opt = QTAILQ_FIRST(&opts->head);
685 QTAILQ_REMOVE(&opts->list->head, opts, next);
690 /* print value, escaping any commas in value */
691 static void escaped_print(const char *value)
695 for (ptr = value; *ptr; ++ptr) {
703 void qemu_opts_print(QemuOpts *opts, const char *separator)
706 QemuOptDesc *desc = opts->list->desc;
707 const char *sep = "";
710 printf("id=%s", opts->id); /* passed id_wellformed -> no commas */
714 if (desc[0].name == NULL) {
715 QTAILQ_FOREACH(opt, &opts->head, next) {
716 printf("%s%s=", sep, opt->name);
717 escaped_print(opt->str);
722 for (; desc && desc->name; desc++) {
724 opt = qemu_opt_find(opts, desc->name);
726 value = opt ? opt->str : desc->def_value_str;
730 if (desc->type == QEMU_OPT_STRING) {
731 printf("%s%s=", sep, desc->name);
732 escaped_print(value);
733 } else if ((desc->type == QEMU_OPT_SIZE ||
734 desc->type == QEMU_OPT_NUMBER) && opt) {
735 printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint);
737 printf("%s%s=%s", sep, desc->name, value);
743 static const char *get_opt_name_value(const char *params,
744 const char *firstname,
747 char **name, char **value)
750 const char *prefix = "";
752 bool is_help = false;
754 len = strcspn(params, "=,");
755 if (params[len] != '=') {
756 /* found "foo,more" */
758 /* implicitly named first option */
759 *name = g_strdup(firstname);
760 p = get_opt_value(params, value);
762 /* option without value, must be a flag */
763 p = get_opt_name(params, name, len);
764 if (strncmp(*name, "no", 2) == 0) {
765 memmove(*name, *name + 2, strlen(*name + 2) + 1);
766 *value = g_strdup("off");
769 *value = g_strdup("on");
770 is_help = is_help_option(*name);
772 if (!is_help && warn_on_flag) {
773 warn_report("short-form boolean option '%s%s' deprecated", prefix, *name);
774 if (g_str_equal(*name, "delay")) {
775 error_printf("Please use nodelay=%s instead\n", prefix[0] ? "on" : "off");
777 error_printf("Please use %s=%s instead\n", *name, *value);
782 /* found "foo=bar,more" */
783 p = get_opt_name(params, name, len);
786 p = get_opt_value(p, value);
789 assert(!*p || *p == ',');
790 if (help_wanted && is_help) {
799 static bool opts_do_parse(QemuOpts *opts, const char *params,
800 const char *firstname,
801 bool warn_on_flag, bool *help_wanted, Error **errp)
803 char *option, *value;
807 for (p = params; *p;) {
808 p = get_opt_name_value(p, firstname, warn_on_flag, help_wanted, &option, &value);
809 if (help_wanted && *help_wanted) {
816 if (!strcmp(option, "id")) {
822 opt = opt_create(opts, option, value);
824 if (!opt_validate(opt, errp)) {
833 static char *opts_parse_id(const char *params)
838 for (p = params; *p;) {
839 p = get_opt_name_value(p, NULL, false, NULL, &name, &value);
840 if (!strcmp(name, "id")) {
851 bool has_help_option(const char *params)
857 for (p = params; *p;) {
858 p = get_opt_name_value(p, NULL, false, &ret, &name, &value);
870 * Store options parsed from @params into @opts.
871 * If @firstname is non-null, the first key=value in @params may omit
872 * key=, and is treated as if key was @firstname.
873 * On error, store an error object through @errp if non-null.
875 bool qemu_opts_do_parse(QemuOpts *opts, const char *params,
876 const char *firstname, Error **errp)
878 return opts_do_parse(opts, params, firstname, false, NULL, errp);
881 static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
883 bool warn_on_flag, bool *help_wanted, Error **errp)
885 const char *firstname;
886 char *id = opts_parse_id(params);
889 assert(!permit_abbrev || list->implied_opt_name);
890 firstname = permit_abbrev ? list->implied_opt_name : NULL;
892 opts = qemu_opts_create(list, id, !list->merge_lists, errp);
898 if (!opts_do_parse(opts, params, firstname,
899 warn_on_flag, help_wanted, errp)) {
908 * Create a QemuOpts in @list and with options parsed from @params.
909 * If @permit_abbrev, the first key=value in @params may omit key=,
910 * and is treated as if key was @list->implied_opt_name.
911 * On error, store an error object through @errp if non-null.
912 * Return the new QemuOpts on success, null pointer on error.
914 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
915 bool permit_abbrev, Error **errp)
917 return opts_parse(list, params, permit_abbrev, false, NULL, errp);
921 * Create a QemuOpts in @list and with options parsed from @params.
922 * If @permit_abbrev, the first key=value in @params may omit key=,
923 * and is treated as if key was @list->implied_opt_name.
924 * Report errors with error_report_err(). This is inappropriate in
925 * QMP context. Do not use this function there!
926 * Return the new QemuOpts on success, null pointer on error.
928 QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params,
933 bool help_wanted = false;
935 opts = opts_parse(list, params, permit_abbrev, true,
936 opts_accepts_any(list) ? NULL : &help_wanted,
939 assert(!!err + !!help_wanted == 1);
941 qemu_opts_print_help(list, true);
943 error_report_err(err);
949 static bool qemu_opts_from_qdict_entry(QemuOpts *opts,
950 const QDictEntry *entry,
953 const char *key = qdict_entry_key(entry);
954 QObject *obj = qdict_entry_value(entry);
956 g_autofree char *tmp = NULL;
959 if (!strcmp(key, "id")) {
963 switch (qobject_type(obj)) {
965 value = qstring_get_str(qobject_to(QString, obj));
968 tmp = qnum_to_string(qobject_to(QNum, obj));
972 pstrcpy(buf, sizeof(buf),
973 qbool_get_bool(qobject_to(QBool, obj)) ? "on" : "off");
980 return qemu_opt_set(opts, key, value, errp);
984 * Create QemuOpts from a QDict.
985 * Use value of key "id" as ID if it exists and is a QString. Only
986 * QStrings, QNums and QBools are copied. Entries with other types
987 * are silently ignored.
989 QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict,
993 const QDictEntry *entry;
995 opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1, errp);
1000 for (entry = qdict_first(qdict);
1002 entry = qdict_next(qdict, entry)) {
1003 if (!qemu_opts_from_qdict_entry(opts, entry, errp)) {
1004 qemu_opts_del(opts);
1013 * Adds all QDict entries to the QemuOpts that can be added and removes them
1014 * from the QDict. When this function returns, the QDict contains only those
1015 * entries that couldn't be added to the QemuOpts.
1017 bool qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp)
1019 const QDictEntry *entry, *next;
1021 entry = qdict_first(qdict);
1023 while (entry != NULL) {
1024 next = qdict_next(qdict, entry);
1026 if (opts_accepts_any(opts->list) ||
1027 find_desc_by_name(opts->list->desc, entry->key)) {
1028 if (!qemu_opts_from_qdict_entry(opts, entry, errp)) {
1031 qdict_del(qdict, entry->key);
1041 * Convert from QemuOpts to QDict. The QDict values are of type QString.
1043 * If @list is given, only add those options to the QDict that are contained in
1044 * the list. If @del is true, any options added to the QDict are removed from
1045 * the QemuOpts, otherwise they remain there.
1047 * If two options in @opts have the same name, they are processed in order
1048 * so that the last one wins (consistent with the reverse iteration in
1049 * qemu_opt_find()), but all of them are deleted if @del is true.
1051 * TODO We'll want to use types appropriate for opt->desc->type, but
1052 * this is enough for now.
1054 QDict *qemu_opts_to_qdict_filtered(QemuOpts *opts, QDict *qdict,
1055 QemuOptsList *list, bool del)
1057 QemuOpt *opt, *next;
1060 qdict = qdict_new();
1063 qdict_put_str(qdict, "id", opts->id);
1065 QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next) {
1069 for (desc = list->desc; desc->name; desc++) {
1070 if (!strcmp(desc->name, opt->name)) {
1079 qdict_put_str(qdict, opt->name, opt->str);
1087 /* Copy all options in a QemuOpts to the given QDict. See
1088 * qemu_opts_to_qdict_filtered() for details. */
1089 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict)
1091 return qemu_opts_to_qdict_filtered(opts, qdict, NULL, false);
1094 /* Validate parsed opts against descriptions where no
1095 * descriptions were provided in the QemuOptsList.
1097 bool qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp)
1101 assert(opts_accepts_any(opts->list));
1103 QTAILQ_FOREACH(opt, &opts->head, next) {
1104 opt->desc = find_desc_by_name(desc, opt->name);
1106 error_setg(errp, QERR_INVALID_PARAMETER, opt->name);
1110 if (!qemu_opt_parse(opt, errp)) {
1119 * For each member of @list, call @func(@opaque, member, @errp).
1120 * Call it with the current location temporarily set to the member's.
1121 * @func() may store an Error through @errp, but must return non-zero then.
1122 * When @func() returns non-zero, break the loop and return that value.
1123 * Return zero when the loop completes.
1125 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func,
1126 void *opaque, Error **errp)
1129 QemuOpts *opts, *next;
1132 loc_push_none(&loc);
1133 QTAILQ_FOREACH_SAFE(opts, &list->head, next, next) {
1134 loc_restore(&opts->loc);
1135 rc = func(opaque, opts, errp);
1139 assert(!errp || !*errp);
1145 static size_t count_opts_list(QemuOptsList *list)
1147 QemuOptDesc *desc = NULL;
1148 size_t num_opts = 0;
1155 while (desc && desc->name) {
1163 void qemu_opts_free(QemuOptsList *list)
1168 /* Realloc dst option list and append options from an option list (list)
1169 * to it. dst could be NULL or a malloced list.
1170 * The lifetime of dst must be shorter than the input list because the
1171 * QemuOptDesc->name, ->help, and ->def_value_str strings are shared.
1173 QemuOptsList *qemu_opts_append(QemuOptsList *dst,
1176 size_t num_opts, num_dst_opts;
1178 bool need_init = false;
1179 bool need_head_update;
1185 /* If dst is NULL, after realloc, some area of dst should be initialized
1186 * before adding options to it.
1190 need_head_update = true;
1192 /* Moreover, even if dst is not NULL, the realloc may move it to a
1193 * different address in which case we may get a stale tail pointer
1195 need_head_update = QTAILQ_EMPTY(&dst->head);
1198 num_opts = count_opts_list(dst);
1199 num_dst_opts = num_opts;
1200 num_opts += count_opts_list(list);
1201 dst = g_realloc(dst, sizeof(QemuOptsList) +
1202 (num_opts + 1) * sizeof(QemuOptDesc));
1205 dst->implied_opt_name = NULL;
1206 dst->merge_lists = false;
1208 if (need_head_update) {
1209 QTAILQ_INIT(&dst->head);
1211 dst->desc[num_dst_opts].name = NULL;
1213 /* append list->desc to dst->desc */
1216 while (desc && desc->name) {
1217 if (find_desc_by_name(dst->desc, desc->name) == NULL) {
1218 dst->desc[num_dst_opts++] = *desc;
1219 dst->desc[num_dst_opts].name = NULL;