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vl: Split off user_creatable_print_help() 

Printing help for --object is something that we not only want in the
system emulator, but also in tools that support --object. Move it into a
separate function in qom/object_interfaces.c to make the code accessible
for tools.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2019-10-11 19:20:12 +02:00
parent 48c8d3ce6d
commit 3e9297f365
3 changed files with 74 additions and 51 deletions
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12
include/qom/object_interfaces.h
View File

@ -132,6 +132,18 @@ typedef bool (*user_creatable_add_opts_predicate)(const char *type);
int user_creatable_add_opts_foreach(void *opaque,
QemuOpts *opts, Error **errp);
/**
* user_creatable_print_help:
* @type: the QOM type to be added
* @opts: options to create
*
* Prints help if requested in @opts.
*
* Returns: true if @opts contained a help option and help was printed, false
* if no help option was found.
*/
bool user_creatable_print_help(const char *type, QemuOpts *opts);
/**
* user_creatable_del:
* @id: the unique ID for the object

61
qom/object_interfaces.c
View File

@ -1,8 +1,11 @@
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qom/object_interfaces.h"
#include "qemu/help_option.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qapi/opts-visitor.h"
@ -155,6 +158,64 @@ int user_creatable_add_opts_foreach(void *opaque, QemuOpts *opts, Error **errp)
return 0;
}
bool user_creatable_print_help(const char *type, QemuOpts *opts)
{
ObjectClass *klass;
if (is_help_option(type)) {
GSList *l, *list;
printf("List of user creatable objects:\n");
list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
for (l = list; l != NULL; l = l->next) {
ObjectClass *oc = OBJECT_CLASS(l->data);
printf(" %s\n", object_class_get_name(oc));
}
g_slist_free(list);
return true;
}
klass = object_class_by_name(type);
if (klass && qemu_opt_has_help_opt(opts)) {
ObjectPropertyIterator iter;
ObjectProperty *prop;
GPtrArray *array = g_ptr_array_new();
int i;
object_class_property_iter_init(&iter, klass);
while ((prop = object_property_iter_next(&iter))) {
GString *str;
if (!prop->set) {
continue;
}
str = g_string_new(NULL);
g_string_append_printf(str, " %s=<%s>", prop->name, prop->type);
if (prop->description) {
if (str->len < 24) {
g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
}
g_string_append_printf(str, " - %s", prop->description);
}
g_ptr_array_add(array, g_string_free(str, false));
}
g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
if (array->len > 0) {
printf("%s options:\n", type);
} else {
printf("There are no options for %s.\n", type);
}
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);
return true;
}
return false;
}
void user_creatable_del(const char *id, Error **errp)
{

52
vl.c
View File

@ -2649,57 +2649,7 @@ static int machine_set_property(void *opaque,
*/
static bool object_create_initial(const char *type, QemuOpts *opts)
{
ObjectClass *klass;
if (is_help_option(type)) {
GSList *l, *list;
printf("List of user creatable objects:\n");
list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
for (l = list; l != NULL; l = l->next) {
ObjectClass *oc = OBJECT_CLASS(l->data);
printf(" %s\n", object_class_get_name(oc));
}
g_slist_free(list);
exit(0);
}
klass = object_class_by_name(type);
if (klass && qemu_opt_has_help_opt(opts)) {
ObjectPropertyIterator iter;
ObjectProperty *prop;
GPtrArray *array = g_ptr_array_new();
int i;
object_class_property_iter_init(&iter, klass);
while ((prop = object_property_iter_next(&iter))) {
GString *str;
if (!prop->set) {
continue;
}
str = g_string_new(NULL);
g_string_append_printf(str, " %s=<%s>", prop->name, prop->type);
if (prop->description) {
if (str->len < 24) {
g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
}
g_string_append_printf(str, " - %s", prop->description);
}
g_ptr_array_add(array, g_string_free(str, false));
}
g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
if (array->len > 0) {
printf("%s options:\n", type);
} else {
printf("There are no options for %s.\n", type);
}
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);
if (user_creatable_print_help(type, opts)) {
exit(0);
}