static mrp_json_t *alloc_reply(const char *type, int seq)
{
mrp_json_t *reply;
reply = mrp_json_create(MRP_JSON_OBJECT);
if (reply != NULL) {
if (mrp_json_add_string (reply, "type", type) &&
mrp_json_add_integer(reply, "seq" , seq))
return reply;
else
mrp_json_unref(reply);
}
mrp_log_error("Failed to allocate WRT resource reply.");
return NULL;
}
static void error_reply(wrt_client_t *c, const char *type, int seq, int code,
const char *fmt, ...)
{
mrp_json_t *reply;
char errmsg[256];
va_list ap;
reply = mrp_json_create(MRP_JSON_OBJECT);
if (reply != NULL) {
va_start(ap, fmt);
vsnprintf(errmsg, sizeof(errmsg), fmt, ap);
errmsg[sizeof(errmsg) - 1] = '\0';
va_end(ap);
if (mrp_json_add_string (reply, "type" , type) &&
mrp_json_add_integer(reply, "seq" , seq ) &&
mrp_json_add_integer(reply, "error" , code) &&
mrp_json_add_string (reply, "message", errmsg))
send_message(c, reply);
mrp_json_unref(reply);
}
}
static void query_resources(wrt_client_t *c, mrp_json_t *req)
{
const char *type = RESWRT_QUERY_RESOURCES;
mrp_json_t *reply, *rarr, *r, *ao;
const char **resources;
int seq, cnt;
mrp_attr_t *attrs, *a;
mrp_attr_t buf[ATTRIBUTE_MAX];
uint32_t id;
if (!mrp_json_get_integer(req, "seq", &seq)) {
ignore_invalid_request(c, req, "missing 'seq' field");
return;
}
rarr = r = ao = NULL;
resources = mrp_resource_definition_get_all_names(0, NULL);
if (resources == NULL) {
error_reply(c, type, seq, ENOMEM, "failed to query class names");
return;
}
reply = alloc_reply(type, seq);
if (reply == NULL)
return;
rarr = mrp_json_create(MRP_JSON_ARRAY);
if (rarr == NULL)
goto fail;
for (id = 0; resources[id]; id++) {
r = mrp_json_create(MRP_JSON_OBJECT);
if (r == NULL)
goto fail;
if (!mrp_json_add_string (r, "name", resources[id]))
goto fail;
attrs = mrp_resource_definition_read_all_attributes(id,
ATTRIBUTE_MAX, buf);
ao = mrp_json_create(MRP_JSON_OBJECT);
if (ao == NULL)
goto fail;
for (a = attrs, cnt = 0; a->name; a++, cnt++) {
switch (a->type) {
case mqi_string:
if (!mrp_json_add_string(ao, a->name, a->value.string))
goto fail;
break;
case mqi_integer:
case mqi_unsignd:
if (!mrp_json_add_integer(ao, a->name, a->value.integer))
goto fail;
break;
case mqi_floating:
if (!mrp_json_add_double(ao, a->name, a->value.floating))
goto fail;
break;
default:
mrp_log_error("attribute '%s' of resource '%s' "
"has unknown type %d", a->name, resources[id],
a->type);
break;
}
}
if (cnt > 0)
mrp_json_add(r, "attributes", ao);
else
mrp_json_unref(ao);
ao = NULL;
if (!mrp_json_array_append(rarr, r))
goto fail;
else
r = NULL;
}
if (mrp_json_add_integer(reply, "status" , 0)) {
mrp_json_add (reply, "resources", rarr);
send_message(c, reply);
}
mrp_json_unref(reply);
mrp_free(resources);
return;
fail:
mrp_json_unref(reply);
mrp_json_unref(rarr);
mrp_json_unref(r);
mrp_json_unref(ao);
mrp_free(resources);
}
mrp_json_t *mrp_json_add_array(mrp_json_t *o, const char *key,
mrp_json_type_t type, ...)
{
va_list ap;
void *arr;
size_t cnt, i;
mrp_json_t *a;
va_start(ap, type);
arr = va_arg(ap, void *);
cnt = va_arg(ap, size_t);
a = mrp_json_create(MRP_JSON_ARRAY);
if (a == NULL)
goto fail;
switch (type) {
case MRP_JSON_STRING:
for (i = 0; i < cnt; i++) {
if (!mrp_json_array_append_string(a, ((char **)arr)[i]))
goto fail;
}
break;
case MRP_JSON_INTEGER:
for (i = 0; i < cnt; i++) {
if (!mrp_json_array_append_integer(a, ((int *)arr)[i]))
goto fail;
}
break;
case MRP_JSON_DOUBLE:
for (i = 0; i < cnt; i++) {
if (!mrp_json_array_append_double(a, ((double *)arr)[i]))
goto fail;
}
break;
case MRP_JSON_BOOLEAN:
for (i = 0; i < cnt; i++) {
if (!mrp_json_array_append_boolean(a, ((bool *)arr)[i]))
goto fail;
}
break;
default:
goto fail;
}
va_end(ap);
mrp_json_add(o, key, a);
return a;
fail:
va_end(ap);
mrp_json_unref(a);
return NULL;
}