* 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.
+ * and is copied into option. The caller is responsible for free'ing option
+ * when no longer required.
*
* 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)
+static const char *get_opt_name(const char *p, char **option, char delim)
{
- char *q;
+ char *offset = strchr(p, delim);
- q = buf;
- while (*p != '\0' && *p != delim) {
- if (q && (q - buf) < buf_size - 1)
- *q++ = *p;
- p++;
+ if (offset) {
+ *option = g_strndup(p, offset - p);
+ return offset;
+ } else {
+ *option = g_strdup(p);
+ return p + strlen(p);
}
- if (q)
- *q = '\0';
-
- return p;
}
/*
* 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)
+const char *get_opt_value(const char *p, char **value)
{
- char *q;
-
- q = buf;
- while (*p != '\0') {
- if (*p == ',') {
- if (*(p + 1) != ',')
- break;
- p++;
+ size_t capacity = 0, length;
+ const char *offset;
+
+ *value = NULL;
+ while (1) {
+ offset = qemu_strchrnul(p, ',');
+ length = offset - p;
+ if (*offset != '\0' && *(offset + 1) == ',') {
+ length++;
+ }
+ *value = g_renew(char, *value, capacity + length + 1);
+ strncpy(*value + capacity, p, length);
+ (*value)[capacity + length] = '\0';
+ capacity += length;
+ if (*offset == '\0' ||
+ *(offset + 1) != ',') {
+ break;
}
- if (q && (q - buf) < buf_size - 1)
- *q++ = *p;
- p++;
+
+ p += (offset - p) + 2;
}
- if (q)
- *q = '\0';
- return p;
+ return offset;
}
static void parse_option_bool(const char *name, const char *value, bool *ret,
bool has_help_option(const char *param)
{
- size_t buflen = strlen(param) + 1;
- char *buf = g_malloc(buflen);
const char *p = param;
bool result = false;
- while (*p) {
- p = get_opt_value(buf, buflen, p);
+ while (*p && !result) {
+ char *value;
+
+ p = get_opt_value(p, &value);
if (*p) {
p++;
}
- if (is_help_option(buf)) {
- result = true;
- goto out;
- }
+ result = is_help_option(value);
+ g_free(value);
}
-out:
- g_free(buf);
return result;
}
-bool is_valid_option_list(const char *param)
+bool is_valid_option_list(const char *p)
{
- size_t buflen = strlen(param) + 1;
- char *buf = g_malloc(buflen);
- const char *p = param;
- bool result = true;
+ char *value = NULL;
+ bool result = false;
while (*p) {
- p = get_opt_value(buf, buflen, p);
- if (*p && !*++p) {
- result = false;
+ p = get_opt_value(p, &value);
+ if ((*p && !*++p) ||
+ (!*value || *value == ',')) {
goto out;
}
- if (!*buf || *buf == ',') {
- result = false;
- goto out;
- }
+ g_free(value);
+ value = NULL;
}
+ result = true;
out:
- g_free(buf);
+ g_free(value);
return result;
}
-void qemu_opts_print_help(QemuOptsList *list)
+static const char *opt_type_to_string(enum QemuOptType type)
+{
+ switch (type) {
+ case QEMU_OPT_STRING:
+ return "str";
+ case QEMU_OPT_BOOL:
+ return "bool (on/off)";
+ case QEMU_OPT_NUMBER:
+ return "num";
+ case QEMU_OPT_SIZE:
+ return "size";
+ }
+
+ g_assert_not_reached();
+}
+
+/**
+ * Print the list of options available in the given list. If
+ * @print_caption is true, a caption (including the list name, if it
+ * exists) is printed. The options itself will be indented, so
+ * @print_caption should only be set to false if the caller prints its
+ * own custom caption (so that the indentation makes sense).
+ */
+void qemu_opts_print_help(QemuOptsList *list, bool print_caption)
{
QemuOptDesc *desc;
+ int i;
+ GPtrArray *array = g_ptr_array_new();
assert(list);
desc = list->desc;
- printf("Supported options:\n");
while (desc && desc->name) {
- printf("%-16s %s\n", desc->name,
- desc->help ? desc->help : "No description available");
+ GString *str = g_string_new(NULL);
+ g_string_append_printf(str, " %s=<%s>", desc->name,
+ opt_type_to_string(desc->type));
+ if (desc->help) {
+ if (str->len < 24) {
+ g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
+ }
+ g_string_append_printf(str, " - %s", desc->help);
+ }
+ g_ptr_array_add(array, g_string_free(str, false));
desc++;
}
+
+ g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
+ if (print_caption && array->len > 0) {
+ if (list->name) {
+ printf("%s options:\n", list->name);
+ } else {
+ printf("Options:\n");
+ }
+ } else if (array->len == 0) {
+ if (list->name) {
+ printf("There are no options for %s.\n", list->name);
+ } else {
+ printf("No options available.\n");
+ }
+ }
+ for (i = 0; i < array->len; i++) {
+ printf("%s\n", (char *)array->pdata[i]);
+ }
+ g_ptr_array_set_free_func(array, g_free);
+ g_ptr_array_free(array, true);
+
}
/* ------------------------------------------------------------------ */
{
QemuOpt *opt;
- QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
+ QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
if (strcmp(opt->name, name) != 0)
continue;
return opt;
{
QemuOpt *opt;
- QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
+ QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
if (is_help_option(opt->name)) {
return true;
}
}
}
-static void opt_set(QemuOpts *opts, const char *name, const char *value,
- bool prepend, Error **errp)
+static void opt_set(QemuOpts *opts, const char *name, char *value,
+ bool prepend, bool *invalidp, Error **errp)
{
QemuOpt *opt;
const QemuOptDesc *desc;
desc = find_desc_by_name(opts->list->desc, name);
if (!desc && !opts_accepts_any(opts)) {
+ g_free(value);
error_setg(errp, QERR_INVALID_PARAMETER, name);
+ if (invalidp) {
+ *invalidp = true;
+ }
return;
}
QTAILQ_INSERT_TAIL(&opts->head, opt, next);
}
opt->desc = desc;
- opt->str = g_strdup(value);
- assert(opt->str);
+ opt->str = value;
qemu_opt_parse(opt, &local_err);
if (local_err) {
error_propagate(errp, local_err);
void qemu_opt_set(QemuOpts *opts, const char *name, const char *value,
Error **errp)
{
- opt_set(opts, name, value, false, errp);
+ opt_set(opts, name, g_strdup(value), false, NULL, errp);
}
void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val,
}
static void opts_do_parse(QemuOpts *opts, const char *params,
- const char *firstname, bool prepend, Error **errp)
+ const char *firstname, bool prepend,
+ bool *invalidp, Error **errp)
{
- char option[128], value[1024];
+ char *option = NULL;
+ char *value = NULL;
const char *p,*pe,*pc;
Error *local_err = NULL;
/* found "foo,more" */
if (p == params && firstname) {
/* implicitly named first option */
- pstrcpy(option, sizeof(option), firstname);
- p = get_opt_value(value, sizeof(value), p);
+ option = g_strdup(firstname);
+ p = get_opt_value(p, &value);
} else {
/* option without value, probably a flag */
- p = get_opt_name(option, sizeof(option), p, ',');
+ p = get_opt_name(p, &option, ',');
if (strncmp(option, "no", 2) == 0) {
memmove(option, option+2, strlen(option+2)+1);
- pstrcpy(value, sizeof(value), "off");
+ value = g_strdup("off");
} else {
- pstrcpy(value, sizeof(value), "on");
+ value = g_strdup("on");
}
}
} else {
/* found "foo=bar,more" */
- p = get_opt_name(option, sizeof(option), p, '=');
- if (*p != '=') {
- break;
- }
+ p = get_opt_name(p, &option, '=');
+ assert(*p == '=');
p++;
- p = get_opt_value(value, sizeof(value), p);
+ p = get_opt_value(p, &value);
}
if (strcmp(option, "id") != 0) {
/* store and parse */
- opt_set(opts, option, value, prepend, &local_err);
+ opt_set(opts, option, value, prepend, invalidp, &local_err);
+ value = NULL;
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto cleanup;
}
}
if (*p != ',') {
break;
}
+ g_free(option);
+ g_free(value);
+ option = value = NULL;
}
+
+ cleanup:
+ g_free(option);
+ g_free(value);
}
/**
void qemu_opts_do_parse(QemuOpts *opts, const char *params,
const char *firstname, Error **errp)
{
- opts_do_parse(opts, params, firstname, false, errp);
+ opts_do_parse(opts, params, firstname, false, NULL, errp);
}
static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
- bool permit_abbrev, bool defaults, Error **errp)
+ bool permit_abbrev, bool defaults,
+ bool *invalidp, Error **errp)
{
const char *firstname;
- char value[1024], *id = NULL;
+ char *id = NULL;
const char *p;
QemuOpts *opts;
Error *local_err = NULL;
firstname = permit_abbrev ? list->implied_opt_name : NULL;
if (strncmp(params, "id=", 3) == 0) {
- get_opt_value(value, sizeof(value), params+3);
- id = value;
+ get_opt_value(params + 3, &id);
} else if ((p = strstr(params, ",id=")) != NULL) {
- get_opt_value(value, sizeof(value), p+4);
- id = value;
+ get_opt_value(p + 4, &id);
}
/*
*/
assert(!defaults || list->merge_lists);
opts = qemu_opts_create(list, id, !defaults, &local_err);
+ g_free(id);
if (opts == NULL) {
error_propagate(errp, local_err);
return NULL;
}
- opts_do_parse(opts, params, firstname, defaults, &local_err);
+ opts_do_parse(opts, params, firstname, defaults, invalidp, &local_err);
if (local_err) {
error_propagate(errp, local_err);
qemu_opts_del(opts);
QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
bool permit_abbrev, Error **errp)
{
- return opts_parse(list, params, permit_abbrev, false, errp);
+ return opts_parse(list, params, permit_abbrev, false, NULL, errp);
}
/**
{
Error *err = NULL;
QemuOpts *opts;
+ bool invalidp = false;
- opts = opts_parse(list, params, permit_abbrev, false, &err);
+ opts = opts_parse(list, params, permit_abbrev, false, &invalidp, &err);
if (err) {
- error_report_err(err);
+ if (invalidp && has_help_option(params)) {
+ qemu_opts_print_help(list, true);
+ error_free(err);
+ } else {
+ error_report_err(err);
+ }
}
return opts;
}
{
QemuOpts *opts;
- opts = opts_parse(list, params, permit_abbrev, true, NULL);
+ opts = opts_parse(list, params, permit_abbrev, true, NULL, NULL);
assert(opts);
}
switch (qobject_type(obj)) {
case QTYPE_QSTRING:
- value = qstring_get_str(qobject_to_qstring(obj));
+ value = qstring_get_str(qobject_to(QString, obj));
break;
case QTYPE_QNUM:
- tmp = qnum_to_string(qobject_to_qnum(obj));
+ tmp = qnum_to_string(qobject_to(QNum, obj));
value = tmp;
break;
case QTYPE_QBOOL:
pstrcpy(buf, sizeof(buf),
- qbool_get_bool(qobject_to_qbool(obj)) ? "on" : "off");
+ qbool_get_bool(qobject_to(QBool, obj)) ? "on" : "off");
value = buf;
break;
default:
projects / mirror_qemu.git / blobdiff