#include <string.h>
#include "qemu-common.h"
+#include "qemu-error.h"
+#include "qemu-objects.h"
#include "qemu-option.h"
+#include "qerror.h"
/*
* Extracts the name of an option from the parameter string (p points at the
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
*/
return NULL;
}
+static int parse_option_bool(const char *name, const char *value, int *ret)
+{
+ if (value != NULL) {
+ if (!strcmp(value, "on")) {
+ *ret = 1;
+ } else if (!strcmp(value, "off")) {
+ *ret = 0;
+ } else {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "'on' or 'off'");
+ return -1;
+ }
+ } else {
+ *ret = 1;
+ }
+ return 0;
+}
+
+static int parse_option_number(const char *name, const char *value, uint64_t *ret)
+{
+ char *postfix;
+ uint64_t number;
+
+ if (value != NULL) {
+ number = strtoull(value, &postfix, 0);
+ if (*postfix != '\0') {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a number");
+ return -1;
+ }
+ *ret = number;
+ } else {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a number");
+ return -1;
+ }
+ return 0;
+}
+
+static int parse_option_size(const char *name, const char *value, uint64_t *ret)
+{
+ char *postfix;
+ double sizef;
+
+ if (value != NULL) {
+ sizef = strtod(value, &postfix);
+ switch (*postfix) {
+ case 'T':
+ sizef *= 1024;
+ case 'G':
+ sizef *= 1024;
+ case 'M':
+ sizef *= 1024;
+ case 'K':
+ case 'k':
+ sizef *= 1024;
+ case 'b':
+ case '\0':
+ *ret = (uint64_t) sizef;
+ break;
+ default:
+ qerror_report(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 -1;
+ }
+ } else {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a size");
+ return -1;
+ }
+ return 0;
+}
+
/*
* Sets the value of a parameter in a given option list. The parsing of the
* value depends on the type of option:
int set_option_parameter(QEMUOptionParameter *list, const char *name,
const char *value)
{
+ int flag;
+
// Find a matching parameter
list = get_option_parameter(list, name);
if (list == NULL) {
// Process parameter
switch (list->type) {
case OPT_FLAG:
- if (value != NULL) {
- if (!strcmp(value, "on")) {
- list->value.n = 1;
- } else if (!strcmp(value, "off")) {
- list->value.n = 0;
- } else {
- fprintf(stderr, "Option '%s': Use 'on' or 'off'\n", name);
- return -1;
- }
- } else {
- list->value.n = 1;
- }
+ if (parse_option_bool(name, value, &flag) == -1)
+ return -1;
+ list->value.n = flag;
break;
case OPT_STRING:
if (value != NULL) {
- list->value.s = strdup(value);
+ list->value.s = qemu_strdup(value);
} else {
fprintf(stderr, "Option '%s' needs a parameter\n", name);
return -1;
break;
case OPT_SIZE:
- if (value != NULL) {
- double sizef = strtod(value, (char**) &value);
-
- switch (*value) {
- case 'T':
- sizef *= 1024;
- case 'G':
- sizef *= 1024;
- case 'M':
- sizef *= 1024;
- case 'K':
- case 'k':
- sizef *= 1024;
- case 'b':
- case '\0':
- list->value.n = (uint64_t) sizef;
- break;
- default:
- fprintf(stderr, "Option '%s' needs size as parameter\n", name);
- fprintf(stderr, "You may use k, M, G or T suffixes for "
- "kilobytes, megabytes, gigabytes and terabytes.\n");
- return -1;
- }
- } else {
- fprintf(stderr, "Option '%s' needs a parameter\n", name);
+ if (parse_option_size(name, value, &list->value.n) == -1)
return -1;
- }
break;
+
default:
fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name);
return -1;
while (cur && cur->name) {
if (cur->type == OPT_STRING) {
- free(cur->value.s);
+ qemu_free(cur->value.s);
}
cur++;
}
- free(list);
+ qemu_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 = qemu_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 templace is. If dest is NULL, a new copy of list is created for
- * it. If list is NULL, this function fails.
+ * 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
QEMUOptionParameter *parse_option_parameters(const char *param,
QEMUOptionParameter *list, QEMUOptionParameter *dest)
{
- QEMUOptionParameter *cur;
QEMUOptionParameter *allocated = NULL;
char name[256];
char value[256];
char *param_delim, *value_delim;
char next_delim;
- size_t num_options;
if (list == NULL) {
return NULL;
}
if (dest == NULL) {
- // Count valid options
- num_options = 0;
- cur = list;
- while (cur->name) {
- num_options++;
- cur++;
- }
-
- // Create a copy of the option list to fill in values
- dest = qemu_mallocz((num_options + 1) * sizeof(QEMUOptionParameter));
- allocated = dest;
- memcpy(dest, list, (num_options + 1) * sizeof(QEMUOptionParameter));
+ dest = allocated = append_option_parameters(NULL, list);
}
while (*param) {
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++;
+ }
+}
+
+/* ------------------------------------------------------------------ */
+
+struct QemuOpt {
+ const char *name;
+ const char *str;
+
+ const QemuOptDesc *desc;
+ union {
+ int boolean;
+ uint64_t uint;
+ } value;
+
+ QemuOpts *opts;
+ QTAILQ_ENTRY(QemuOpt) next;
+};
+
+struct QemuOpts {
+ char *id;
+ QemuOptsList *list;
+ Location loc;
+ QTAILQ_HEAD(QemuOptHead, QemuOpt) head;
+ QTAILQ_ENTRY(QemuOpts) next;
+};
+
+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;
+}
+
+int qemu_opt_get_bool(QemuOpts *opts, const char *name, int 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 int qemu_opt_parse(QemuOpt *opt)
+{
+ if (opt->desc == NULL)
+ return 0;
+ switch (opt->desc->type) {
+ case QEMU_OPT_STRING:
+ /* nothing */
+ return 0;
+ case QEMU_OPT_BOOL:
+ return parse_option_bool(opt->name, opt->str, &opt->value.boolean);
+ case QEMU_OPT_NUMBER:
+ return parse_option_number(opt->name, opt->str, &opt->value.uint);
+ case QEMU_OPT_SIZE:
+ return parse_option_size(opt->name, opt->str, &opt->value.uint);
+ default:
+ abort();
+ }
+}
+
+static void qemu_opt_del(QemuOpt *opt)
+{
+ QTAILQ_REMOVE(&opt->opts->head, opt, next);
+ qemu_free((/* !const */ char*)opt->name);
+ qemu_free((/* !const */ char*)opt->str);
+ qemu_free(opt);
+}
+
+int qemu_opt_set(QemuOpts *opts, const char *name, const char *value)
+{
+ QemuOpt *opt;
+ const QemuOptDesc *desc = opts->list->desc;
+ int i;
+
+ for (i = 0; desc[i].name != NULL; i++) {
+ if (strcmp(desc[i].name, name) == 0) {
+ break;
+ }
+ }
+ if (desc[i].name == NULL) {
+ if (i == 0) {
+ /* empty list -> allow any */;
+ } else {
+ qerror_report(QERR_INVALID_PARAMETER, name);
+ return -1;
+ }
+ }
+
+ opt = qemu_mallocz(sizeof(*opt));
+ opt->name = qemu_strdup(name);
+ opt->opts = opts;
+ QTAILQ_INSERT_TAIL(&opts->head, opt, next);
+ if (desc[i].name != NULL) {
+ opt->desc = desc+i;
+ }
+ if (value) {
+ opt->str = qemu_strdup(value);
+ }
+ if (qemu_opt_parse(opt) < 0) {
+ qemu_opt_del(opt);
+ return -1;
+ }
+ 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) {
+ 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)
+{
+ QemuOpts *opts = NULL;
+
+ if (id) {
+ if (!id_wellformed(id)) {
+ qerror_report(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) {
+ qerror_report(QERR_DUPLICATE_ID, id, list->name);
+ return NULL;
+ } else {
+ return opts;
+ }
+ }
+ }
+ opts = qemu_mallocz(sizeof(*opts));
+ if (id) {
+ opts->id = qemu_strdup(id);
+ }
+ opts->list = list;
+ loc_save(&opts->loc);
+ QTAILQ_INIT(&opts->head);
+ QTAILQ_INSERT_TAIL(&list->head, opts, next);
+ 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;
+
+ opts = qemu_opts_create(list, id, 1);
+ if (opts == NULL) {
+ 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);
+ qemu_free(opts->id);
+ qemu_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;
+}
+
+int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname)
+{
+ char option[128], value[1024];
+ const char *p,*pe,*pc;
+
+ 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 */
+ if (qemu_opt_set(opts, option, value) == -1) {
+ return -1;
+ }
+ }
+ if (*p != ',') {
+ break;
+ }
+ }
+ return 0;
+}
+
+QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
+ int permit_abbrev)
+{
+ const char *firstname;
+ char value[1024], *id = NULL;
+ const char *p;
+ QemuOpts *opts;
+
+ 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;
+ }
+ opts = qemu_opts_create(list, id, 1);
+ if (opts == NULL)
+ return NULL;
+
+ if (qemu_opts_do_parse(opts, params, firstname) != 0) {
+ qemu_opts_del(opts);
+ return NULL;
+ }
+
+ return opts;
+}
+
+static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque)
+{
+ char buf[32];
+ const char *value;
+ int n;
+
+ if (!strcmp(key, "id")) {
+ 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(opaque, key, value);
+}
+
+/*
+ * 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)
+{
+ QemuOpts *opts;
+
+ opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1);
+ if (opts == NULL)
+ return NULL;
+
+ qdict_iter(qdict, qemu_opts_from_qdict_1, opts);
+ 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.
+ */
+int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc)
+{
+ QemuOpt *opt;
+
+ assert(opts->list->desc[0].name == NULL);
+
+ QTAILQ_FOREACH(opt, &opts->head, next) {
+ int i;
+
+ for (i = 0; desc[i].name != NULL; i++) {
+ if (strcmp(desc[i].name, opt->name) == 0) {
+ break;
+ }
+ }
+ if (desc[i].name == NULL) {
+ qerror_report(QERR_INVALID_PARAMETER, opt->name);
+ return -1;
+ }
+
+ opt->desc = &desc[i];
+
+ if (qemu_opt_parse(opt) < 0) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+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;
+}
projects / qemu.git / blobdiff