diff options
Diffstat (limited to 'util/qemu-option.c')
| -rw-r--r-- | util/qemu-option.c | 1134 |
1 files changed, 1134 insertions, 0 deletions
diff --git a/util/qemu-option.c b/util/qemu-option.c new file mode 100644 index 0000000000..f532b765a0 --- /dev/null +++ b/util/qemu-option.c @@ -0,0 +1,1134 @@ +/* + * Commandline option parsing functions + * + * Copyright (c) 2003-2008 Fabrice Bellard + * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <stdio.h> +#include <string.h> + +#include "qemu-common.h" +#include "qemu/error-report.h" +#include "qapi/qmp/types.h" +#include "qapi/error.h" +#include "qapi/qmp/qerror.h" +#include "qemu/option_int.h" + +/* + * Extracts the name of an option from the parameter string (p points at the + * first byte of the option name) + * + * The option name is delimited by delim (usually , or =) or the string end + * and is copied into buf. If the option name is longer than buf_size, it is + * truncated. buf is always zero terminated. + * + * The return value is the position of the delimiter/zero byte after the option + * name in p. + */ +const char *get_opt_name(char *buf, int buf_size, const char *p, char delim) +{ + char *q; + + q = buf; + while (*p != '\0' && *p != delim) { + if (q && (q - buf) < buf_size - 1) + *q++ = *p; + p++; + } + if (q) + *q = '\0'; + + return p; +} + +/* + * Extracts the value of an option from the parameter string p (p points at the + * first byte of the option value) + * + * This function is comparable to get_opt_name with the difference that the + * delimiter is fixed to be comma which starts a new option. To specify an + * option value that contains commas, double each comma. + */ +const char *get_opt_value(char *buf, int buf_size, const char *p) +{ + char *q; + + q = buf; + while (*p != '\0') { + if (*p == ',') { + if (*(p + 1) != ',') + break; + p++; + } + if (q && (q - buf) < buf_size - 1) + *q++ = *p; + p++; + } + if (q) + *q = '\0'; + + return p; +} + +int get_next_param_value(char *buf, int buf_size, + const char *tag, const char **pstr) +{ + const char *p; + char option[128]; + + p = *pstr; + for(;;) { + p = get_opt_name(option, sizeof(option), p, '='); + if (*p != '=') + break; + p++; + if (!strcmp(tag, option)) { + *pstr = get_opt_value(buf, buf_size, p); + if (**pstr == ',') { + (*pstr)++; + } + return strlen(buf); + } else { + p = get_opt_value(NULL, 0, p); + } + if (*p != ',') + break; + p++; + } + return 0; +} + +int get_param_value(char *buf, int buf_size, + const char *tag, const char *str) +{ + return get_next_param_value(buf, buf_size, tag, &str); +} + +int check_params(char *buf, int buf_size, + const char * const *params, const char *str) +{ + const char *p; + int i; + + p = str; + while (*p != '\0') { + p = get_opt_name(buf, buf_size, p, '='); + if (*p != '=') { + return -1; + } + p++; + for (i = 0; params[i] != NULL; i++) { + if (!strcmp(params[i], buf)) { + break; + } + } + if (params[i] == NULL) { + return -1; + } + p = get_opt_value(NULL, 0, p); + if (*p != ',') { + break; + } + p++; + } + return 0; +} + +/* + * Searches an option list for an option with the given name + */ +QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list, + const char *name) +{ + while (list && list->name) { + if (!strcmp(list->name, name)) { + return list; + } + list++; + } + + return NULL; +} + +static void parse_option_bool(const char *name, const char *value, bool *ret, + Error **errp) +{ + if (value != NULL) { + if (!strcmp(value, "on")) { + *ret = 1; + } else if (!strcmp(value, "off")) { + *ret = 0; + } else { + error_set(errp,QERR_INVALID_PARAMETER_VALUE, name, "'on' or 'off'"); + } + } else { + *ret = 1; + } +} + +static void parse_option_number(const char *name, const char *value, + uint64_t *ret, Error **errp) +{ + char *postfix; + uint64_t number; + + if (value != NULL) { + number = strtoull(value, &postfix, 0); + if (*postfix != '\0') { + error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); + return; + } + *ret = number; + } else { + error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); + } +} + +static void parse_option_size(const char *name, const char *value, + uint64_t *ret, Error **errp) +{ + char *postfix; + double sizef; + + if (value != NULL) { + sizef = strtod(value, &postfix); + switch (*postfix) { + case 'T': + sizef *= 1024; + /* fall through */ + case 'G': + sizef *= 1024; + /* fall through */ + case 'M': + sizef *= 1024; + /* fall through */ + case 'K': + case 'k': + sizef *= 1024; + /* fall through */ + case 'b': + case '\0': + *ret = (uint64_t) sizef; + break; + default: + error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); + error_printf_unless_qmp("You may use k, M, G or T suffixes for " + "kilobytes, megabytes, gigabytes and terabytes.\n"); + return; + } + } else { + error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); + } +} + +/* + * Sets the value of a parameter in a given option list. The parsing of the + * value depends on the type of option: + * + * OPT_FLAG (uses value.n): + * If no value is given, the flag is set to 1. + * Otherwise the value must be "on" (set to 1) or "off" (set to 0) + * + * OPT_STRING (uses value.s): + * value is strdup()ed and assigned as option value + * + * OPT_SIZE (uses value.n): + * The value is converted to an integer. Suffixes for kilobytes etc. are + * allowed (powers of 1024). + * + * Returns 0 on succes, -1 in error cases + */ +int set_option_parameter(QEMUOptionParameter *list, const char *name, + const char *value) +{ + bool flag; + Error *local_err = NULL; + + // Find a matching parameter + list = get_option_parameter(list, name); + if (list == NULL) { + fprintf(stderr, "Unknown option '%s'\n", name); + return -1; + } + + // Process parameter + switch (list->type) { + case OPT_FLAG: + parse_option_bool(name, value, &flag, &local_err); + if (!error_is_set(&local_err)) { + list->value.n = flag; + } + break; + + case OPT_STRING: + if (value != NULL) { + list->value.s = g_strdup(value); + } else { + fprintf(stderr, "Option '%s' needs a parameter\n", name); + return -1; + } + break; + + case OPT_SIZE: + parse_option_size(name, value, &list->value.n, &local_err); + break; + + default: + fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name); + return -1; + } + + if (error_is_set(&local_err)) { + qerror_report_err(local_err); + error_free(local_err); + return -1; + } + + return 0; +} + +/* + * Sets the given parameter to an integer instead of a string. + * This function cannot be used to set string options. + * + * Returns 0 on success, -1 in error cases + */ +int set_option_parameter_int(QEMUOptionParameter *list, const char *name, + uint64_t value) +{ + // Find a matching parameter + list = get_option_parameter(list, name); + if (list == NULL) { + fprintf(stderr, "Unknown option '%s'\n", name); + return -1; + } + + // Process parameter + switch (list->type) { + case OPT_FLAG: + case OPT_NUMBER: + case OPT_SIZE: + list->value.n = value; + break; + + default: + return -1; + } + + return 0; +} + +/* + * Frees a option list. If it contains strings, the strings are freed as well. + */ +void free_option_parameters(QEMUOptionParameter *list) +{ + QEMUOptionParameter *cur = list; + + while (cur && cur->name) { + if (cur->type == OPT_STRING) { + g_free(cur->value.s); + } + cur++; + } + + g_free(list); +} + +/* + * Count valid options in list + */ +static size_t count_option_parameters(QEMUOptionParameter *list) +{ + size_t num_options = 0; + + while (list && list->name) { + num_options++; + list++; + } + + return num_options; +} + +/* + * Append an option list (list) to an option list (dest). + * + * If dest is NULL, a new copy of list is created. + * + * Returns a pointer to the first element of dest (or the newly allocated copy) + */ +QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest, + QEMUOptionParameter *list) +{ + size_t num_options, num_dest_options; + + num_options = count_option_parameters(dest); + num_dest_options = num_options; + + num_options += count_option_parameters(list); + + dest = g_realloc(dest, (num_options + 1) * sizeof(QEMUOptionParameter)); + dest[num_dest_options].name = NULL; + + while (list && list->name) { + if (get_option_parameter(dest, list->name) == NULL) { + dest[num_dest_options++] = *list; + dest[num_dest_options].name = NULL; + } + list++; + } + + return dest; +} + +/* + * Parses a parameter string (param) into an option list (dest). + * + * list is the template option list. If dest is NULL, a new copy of list is + * created. If list is NULL, this function fails. + * + * A parameter string consists of one or more parameters, separated by commas. + * Each parameter consists of its name and possibly of a value. In the latter + * case, the value is delimited by an = character. To specify a value which + * contains commas, double each comma so it won't be recognized as the end of + * the parameter. + * + * For more details of the parsing see above. + * + * Returns a pointer to the first element of dest (or the newly allocated copy) + * or NULL in error cases + */ +QEMUOptionParameter *parse_option_parameters(const char *param, + QEMUOptionParameter *list, QEMUOptionParameter *dest) +{ + QEMUOptionParameter *allocated = NULL; + char name[256]; + char value[256]; + char *param_delim, *value_delim; + char next_delim; + + if (list == NULL) { + return NULL; + } + + if (dest == NULL) { + dest = allocated = append_option_parameters(NULL, list); + } + + while (*param) { + + // Find parameter name and value in the string + param_delim = strchr(param, ','); + value_delim = strchr(param, '='); + + if (value_delim && (value_delim < param_delim || !param_delim)) { + next_delim = '='; + } else { + next_delim = ','; + value_delim = NULL; + } + + param = get_opt_name(name, sizeof(name), param, next_delim); + if (value_delim) { + param = get_opt_value(value, sizeof(value), param + 1); + } + if (*param != '\0') { + param++; + } + + // Set the parameter + if (set_option_parameter(dest, name, value_delim ? value : NULL)) { + goto fail; + } + } + + return dest; + +fail: + // Only free the list if it was newly allocated + free_option_parameters(allocated); + return NULL; +} + +/* + * Prints all options of a list that have a value to stdout + */ +void print_option_parameters(QEMUOptionParameter *list) +{ + while (list && list->name) { + switch (list->type) { + case OPT_STRING: + if (list->value.s != NULL) { + printf("%s='%s' ", list->name, list->value.s); + } + break; + case OPT_FLAG: + printf("%s=%s ", list->name, list->value.n ? "on" : "off"); + break; + case OPT_SIZE: + case OPT_NUMBER: + printf("%s=%" PRId64 " ", list->name, list->value.n); + break; + default: + printf("%s=(unknown type) ", list->name); + break; + } + list++; + } +} + +/* + * Prints an overview of all available options + */ +void print_option_help(QEMUOptionParameter *list) +{ + printf("Supported options:\n"); + while (list && list->name) { + printf("%-16s %s\n", list->name, + list->help ? list->help : "No description available"); + list++; + } +} + +/* ------------------------------------------------------------------ */ + +static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) +{ + QemuOpt *opt; + + QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { + if (strcmp(opt->name, name) != 0) + continue; + return opt; + } + return NULL; +} + +const char *qemu_opt_get(QemuOpts *opts, const char *name) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + return opt ? opt->str : NULL; +} + +bool qemu_opt_has_help_opt(QemuOpts *opts) +{ + QemuOpt *opt; + + QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { + if (is_help_option(opt->name)) { + return true; + } + } + return false; +} + +bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + + if (opt == NULL) + return defval; + assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL); + return opt->value.boolean; +} + +uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + + if (opt == NULL) + return defval; + assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER); + return opt->value.uint; +} + +uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + + if (opt == NULL) + return defval; + assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE); + return opt->value.uint; +} + +static void qemu_opt_parse(QemuOpt *opt, Error **errp) +{ + if (opt->desc == NULL) + return; + + switch (opt->desc->type) { + case QEMU_OPT_STRING: + /* nothing */ + return; + case QEMU_OPT_BOOL: + parse_option_bool(opt->name, opt->str, &opt->value.boolean, errp); + break; + case QEMU_OPT_NUMBER: + parse_option_number(opt->name, opt->str, &opt->value.uint, errp); + break; + case QEMU_OPT_SIZE: + parse_option_size(opt->name, opt->str, &opt->value.uint, errp); + break; + default: + abort(); + } +} + +static void qemu_opt_del(QemuOpt *opt) +{ + QTAILQ_REMOVE(&opt->opts->head, opt, next); + g_free((/* !const */ char*)opt->name); + g_free((/* !const */ char*)opt->str); + g_free(opt); +} + +static bool opts_accepts_any(const QemuOpts *opts) +{ + return opts->list->desc[0].name == NULL; +} + +static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc, + const char *name) +{ + int i; + + for (i = 0; desc[i].name != NULL; i++) { + if (strcmp(desc[i].name, name) == 0) { + return &desc[i]; + } + } + + return NULL; +} + +static void opt_set(QemuOpts *opts, const char *name, const char *value, + bool prepend, Error **errp) +{ + QemuOpt *opt; + const QemuOptDesc *desc; + Error *local_err = NULL; + + desc = find_desc_by_name(opts->list->desc, name); + if (!desc && !opts_accepts_any(opts)) { + error_set(errp, QERR_INVALID_PARAMETER, name); + return; + } + + opt = g_malloc0(sizeof(*opt)); + opt->name = g_strdup(name); + opt->opts = opts; + if (prepend) { + QTAILQ_INSERT_HEAD(&opts->head, opt, next); + } else { + QTAILQ_INSERT_TAIL(&opts->head, opt, next); + } + opt->desc = desc; + if (value) { + opt->str = g_strdup(value); + } + qemu_opt_parse(opt, &local_err); + if (error_is_set(&local_err)) { + error_propagate(errp, local_err); + qemu_opt_del(opt); + } +} + +int qemu_opt_set(QemuOpts *opts, const char *name, const char *value) +{ + Error *local_err = NULL; + + opt_set(opts, name, value, false, &local_err); + if (error_is_set(&local_err)) { + qerror_report_err(local_err); + error_free(local_err); + return -1; + } + + return 0; +} + +void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value, + Error **errp) +{ + opt_set(opts, name, value, false, errp); +} + +int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val) +{ + QemuOpt *opt; + const QemuOptDesc *desc = opts->list->desc; + + opt = g_malloc0(sizeof(*opt)); + opt->desc = find_desc_by_name(desc, name); + if (!opt->desc && !opts_accepts_any(opts)) { + qerror_report(QERR_INVALID_PARAMETER, name); + g_free(opt); + return -1; + } + + opt->name = g_strdup(name); + opt->opts = opts; + opt->value.boolean = !!val; + opt->str = g_strdup(val ? "on" : "off"); + QTAILQ_INSERT_TAIL(&opts->head, opt, next); + + return 0; +} + +int qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val) +{ + QemuOpt *opt; + const QemuOptDesc *desc = opts->list->desc; + + opt = g_malloc0(sizeof(*opt)); + opt->desc = find_desc_by_name(desc, name); + if (!opt->desc && !opts_accepts_any(opts)) { + qerror_report(QERR_INVALID_PARAMETER, name); + g_free(opt); + return -1; + } + + opt->name = g_strdup(name); + opt->opts = opts; + opt->value.uint = val; + opt->str = g_strdup_printf("%" PRId64, val); + QTAILQ_INSERT_TAIL(&opts->head, opt, next); + + return 0; +} + +int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque, + int abort_on_failure) +{ + QemuOpt *opt; + int rc = 0; + + QTAILQ_FOREACH(opt, &opts->head, next) { + rc = func(opt->name, opt->str, opaque); + if (abort_on_failure && rc != 0) + break; + } + return rc; +} + +QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id) +{ + QemuOpts *opts; + + QTAILQ_FOREACH(opts, &list->head, next) { + if (!opts->id) { + if (!id) { + return opts; + } + continue; + } + if (strcmp(opts->id, id) != 0) { + continue; + } + return opts; + } + return NULL; +} + +static int id_wellformed(const char *id) +{ + int i; + + if (!qemu_isalpha(id[0])) { + return 0; + } + for (i = 1; id[i]; i++) { + if (!qemu_isalnum(id[i]) && !strchr("-._", id[i])) { + return 0; + } + } + return 1; +} + +QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, + int fail_if_exists, Error **errp) +{ + QemuOpts *opts = NULL; + + if (id) { + if (!id_wellformed(id)) { + error_set(errp,QERR_INVALID_PARAMETER_VALUE, "id", "an identifier"); + error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n"); + return NULL; + } + opts = qemu_opts_find(list, id); + if (opts != NULL) { + if (fail_if_exists && !list->merge_lists) { + error_set(errp, QERR_DUPLICATE_ID, id, list->name); + return NULL; + } else { + return opts; + } + } + } else if (list->merge_lists) { + opts = qemu_opts_find(list, NULL); + if (opts) { + return opts; + } + } + opts = g_malloc0(sizeof(*opts)); + if (id) { + opts->id = g_strdup(id); + } + opts->list = list; + loc_save(&opts->loc); + QTAILQ_INIT(&opts->head); + QTAILQ_INSERT_TAIL(&list->head, opts, next); + return opts; +} + +QemuOpts *qemu_opts_create_nofail(QemuOptsList *list) +{ + QemuOpts *opts; + Error *errp = NULL; + opts = qemu_opts_create(list, NULL, 0, &errp); + assert_no_error(errp); + return opts; +} + +void qemu_opts_reset(QemuOptsList *list) +{ + QemuOpts *opts, *next_opts; + + QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) { + qemu_opts_del(opts); + } +} + +void qemu_opts_loc_restore(QemuOpts *opts) +{ + loc_restore(&opts->loc); +} + +int qemu_opts_set(QemuOptsList *list, const char *id, + const char *name, const char *value) +{ + QemuOpts *opts; + Error *local_err = NULL; + + opts = qemu_opts_create(list, id, 1, &local_err); + if (error_is_set(&local_err)) { + qerror_report_err(local_err); + error_free(local_err); + return -1; + } + return qemu_opt_set(opts, name, value); +} + +const char *qemu_opts_id(QemuOpts *opts) +{ + return opts->id; +} + +void qemu_opts_del(QemuOpts *opts) +{ + QemuOpt *opt; + + for (;;) { + opt = QTAILQ_FIRST(&opts->head); + if (opt == NULL) + break; + qemu_opt_del(opt); + } + QTAILQ_REMOVE(&opts->list->head, opts, next); + g_free(opts->id); + g_free(opts); +} + +int qemu_opts_print(QemuOpts *opts, void *dummy) +{ + QemuOpt *opt; + + fprintf(stderr, "%s: %s:", opts->list->name, + opts->id ? opts->id : "<noid>"); + QTAILQ_FOREACH(opt, &opts->head, next) { + fprintf(stderr, " %s=\"%s\"", opt->name, opt->str); + } + fprintf(stderr, "\n"); + return 0; +} + +static int opts_do_parse(QemuOpts *opts, const char *params, + const char *firstname, bool prepend) +{ + char option[128], value[1024]; + const char *p,*pe,*pc; + Error *local_err = NULL; + + for (p = params; *p != '\0'; p++) { + pe = strchr(p, '='); + pc = strchr(p, ','); + if (!pe || (pc && pc < pe)) { + /* found "foo,more" */ + if (p == params && firstname) { + /* implicitly named first option */ + pstrcpy(option, sizeof(option), firstname); + p = get_opt_value(value, sizeof(value), p); + } else { + /* option without value, probably a flag */ + p = get_opt_name(option, sizeof(option), p, ','); + if (strncmp(option, "no", 2) == 0) { + memmove(option, option+2, strlen(option+2)+1); + pstrcpy(value, sizeof(value), "off"); + } else { + pstrcpy(value, sizeof(value), "on"); + } + } + } else { + /* found "foo=bar,more" */ + p = get_opt_name(option, sizeof(option), p, '='); + if (*p != '=') { + break; + } + p++; + p = get_opt_value(value, sizeof(value), p); + } + if (strcmp(option, "id") != 0) { + /* store and parse */ + opt_set(opts, option, value, prepend, &local_err); + if (error_is_set(&local_err)) { + qerror_report_err(local_err); + error_free(local_err); + return -1; + } + } + if (*p != ',') { + break; + } + } + return 0; +} + +int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname) +{ + return opts_do_parse(opts, params, firstname, false); +} + +static QemuOpts *opts_parse(QemuOptsList *list, const char *params, + int permit_abbrev, bool defaults) +{ + const char *firstname; + char value[1024], *id = NULL; + const char *p; + QemuOpts *opts; + Error *local_err = NULL; + + assert(!permit_abbrev || list->implied_opt_name); + firstname = permit_abbrev ? list->implied_opt_name : NULL; + + if (strncmp(params, "id=", 3) == 0) { + get_opt_value(value, sizeof(value), params+3); + id = value; + } else if ((p = strstr(params, ",id=")) != NULL) { + get_opt_value(value, sizeof(value), p+4); + id = value; + } + if (defaults) { + if (!id && !QTAILQ_EMPTY(&list->head)) { + opts = qemu_opts_find(list, NULL); + } else { + opts = qemu_opts_create(list, id, 0, &local_err); + } + } else { + opts = qemu_opts_create(list, id, 1, &local_err); + } + if (opts == NULL) { + if (error_is_set(&local_err)) { + qerror_report_err(local_err); + error_free(local_err); + } + return NULL; + } + + if (opts_do_parse(opts, params, firstname, defaults) != 0) { + qemu_opts_del(opts); + return NULL; + } + + return opts; +} + +QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, + int permit_abbrev) +{ + return opts_parse(list, params, permit_abbrev, false); +} + +void qemu_opts_set_defaults(QemuOptsList *list, const char *params, + int permit_abbrev) +{ + QemuOpts *opts; + + opts = opts_parse(list, params, permit_abbrev, true); + assert(opts); +} + +typedef struct OptsFromQDictState { + QemuOpts *opts; + Error **errp; +} OptsFromQDictState; + +static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque) +{ + OptsFromQDictState *state = opaque; + char buf[32]; + const char *value; + int n; + + if (!strcmp(key, "id") || error_is_set(state->errp)) { + return; + } + + switch (qobject_type(obj)) { + case QTYPE_QSTRING: + value = qstring_get_str(qobject_to_qstring(obj)); + break; + case QTYPE_QINT: + n = snprintf(buf, sizeof(buf), "%" PRId64, + qint_get_int(qobject_to_qint(obj))); + assert(n < sizeof(buf)); + value = buf; + break; + case QTYPE_QFLOAT: + n = snprintf(buf, sizeof(buf), "%.17g", + qfloat_get_double(qobject_to_qfloat(obj))); + assert(n < sizeof(buf)); + value = buf; + break; + case QTYPE_QBOOL: + pstrcpy(buf, sizeof(buf), + qbool_get_int(qobject_to_qbool(obj)) ? "on" : "off"); + value = buf; + break; + default: + return; + } + + qemu_opt_set_err(state->opts, key, value, state->errp); +} + +/* + * Create QemuOpts from a QDict. + * Use value of key "id" as ID if it exists and is a QString. + * Only QStrings, QInts, QFloats and QBools are copied. Entries with + * other types are silently ignored. + */ +QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict, + Error **errp) +{ + OptsFromQDictState state; + Error *local_err = NULL; + QemuOpts *opts; + + opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1, + &local_err); + if (error_is_set(&local_err)) { + error_propagate(errp, local_err); + return NULL; + } + + assert(opts != NULL); + + state.errp = &local_err; + state.opts = opts; + qdict_iter(qdict, qemu_opts_from_qdict_1, &state); + if (error_is_set(&local_err)) { + error_propagate(errp, local_err); + qemu_opts_del(opts); + return NULL; + } + + return opts; +} + +/* + * Convert from QemuOpts to QDict. + * The QDict values are of type QString. + * TODO We'll want to use types appropriate for opt->desc->type, but + * this is enough for now. + */ +QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict) +{ + QemuOpt *opt; + QObject *val; + + if (!qdict) { + qdict = qdict_new(); + } + if (opts->id) { + qdict_put(qdict, "id", qstring_from_str(opts->id)); + } + QTAILQ_FOREACH(opt, &opts->head, next) { + val = QOBJECT(qstring_from_str(opt->str)); + qdict_put_obj(qdict, opt->name, val); + } + return qdict; +} + +/* Validate parsed opts against descriptions where no + * descriptions were provided in the QemuOptsList. + */ +void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp) +{ + QemuOpt *opt; + Error *local_err = NULL; + + assert(opts_accepts_any(opts)); + + QTAILQ_FOREACH(opt, &opts->head, next) { + opt->desc = find_desc_by_name(desc, opt->name); + if (!opt->desc) { + error_set(errp, QERR_INVALID_PARAMETER, opt->name); + return; + } + + qemu_opt_parse(opt, &local_err); + if (error_is_set(&local_err)) { + error_propagate(errp, local_err); + return; + } + } +} + +int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, + int abort_on_failure) +{ + Location loc; + QemuOpts *opts; + int rc = 0; + + loc_push_none(&loc); + QTAILQ_FOREACH(opts, &list->head, next) { + loc_restore(&opts->loc); + rc |= func(opts, opaque); + if (abort_on_failure && rc != 0) + break; + } + loc_pop(&loc); + return rc; +} |