LILV_API
LilvState*
lilv_state_new_from_string(LilvWorld* world,
const LV2_URID_Map* map,
const char* str)
{
if (!str) {
return NULL;
}
SerdNode base = SERD_NODE_NULL;
SerdEnv* env = serd_env_new(&base);
SordModel* model = sord_new(world->world, SORD_SPO|SORD_OPS, false);
SerdReader* reader = sord_new_reader(model, env, SERD_TURTLE, NULL);
set_prefixes(env);
serd_reader_read_string(reader, USTR(str));
SordNode* o = sord_new_uri(world->world, USTR(LV2_PRESETS__Preset));
SordNode* s = sord_get(model, NULL, world->uris.rdf_a, o, NULL);
LilvState* state = new_state_from_model(world, map, model, s, NULL);
sord_node_free(world->world, s);
sord_node_free(world->world, o);
serd_reader_free(reader);
sord_free(model);
serd_env_free(env);
return state;
}
SordNode*
sord_new_relative_uri(SordWorld* world,
const uint8_t* str,
const uint8_t* base_str)
{
if (serd_uri_string_has_scheme(str)) {
return sord_new_uri(world, str);
}
SerdURI buri = SERD_URI_NULL;
SerdNode base = serd_node_new_uri_from_string(base_str, NULL, &buri);
SerdNode node = serd_node_new_uri_from_string(str, &buri, NULL);
SordNode* ret = sord_new_uri_counted(
world, node.buf, node.n_bytes, node.n_chars, false);
serd_node_free(&base);
return ret;
}
/** Note that if `type` is numeric or boolean, the returned value is corrupt
* until lilv_node_set_numerics_from_string is called. It is not
* automatically called from here to avoid overhead and imprecision when the
* exact string value is known.
*/
LilvNode*
lilv_node_new(LilvWorld* world, LilvNodeType type, const char* str)
{
LilvNode* val = (LilvNode*)malloc(sizeof(LilvNode));
val->world = world;
val->type = type;
const uint8_t* ustr = (const uint8_t*)str;
switch (type) {
case LILV_VALUE_URI:
val->node = sord_new_uri(world->world, ustr);
break;
case LILV_VALUE_BLANK:
val->node = sord_new_blank(world->world, ustr);
break;
case LILV_VALUE_STRING:
val->node = sord_new_literal(world->world, NULL, ustr, NULL);
break;
case LILV_VALUE_INT:
val->node = sord_new_literal(
world->world, world->uris.xsd_integer, ustr, NULL);
break;
case LILV_VALUE_FLOAT:
val->node = sord_new_literal(
world->world, world->uris.xsd_decimal, ustr, NULL);
break;
case LILV_VALUE_BOOL:
val->node = sord_new_literal(
world->world, world->uris.xsd_boolean, ustr, NULL);
break;
case LILV_VALUE_BLOB:
val->node = sord_new_literal(
world->world, world->uris.xsd_base64Binary, ustr, NULL);
break;
}
if (!val->node) {
free(val);
return NULL;
}
return val;
}
static LilvState*
new_state_from_model(LilvWorld* world,
LV2_URID_Map* map,
SordModel* model,
const SordNode* node,
const char* dir)
{
LilvState* const state = (LilvState*)malloc(sizeof(LilvState));
memset(state, '\0', sizeof(LilvState));
state->dir = lilv_strdup(dir);
state->atom_Path = map->map(map->handle, LV2_ATOM__Path);
// Get the plugin URI this state applies to
SordIter* i = sord_search(model, node, world->uris.lv2_appliesTo, 0, 0);
if (i) {
const SordNode* object = sord_iter_get_node(i, SORD_OBJECT);
const SordNode* graph = sord_iter_get_node(i, SORD_GRAPH);
state->plugin_uri = lilv_node_new_from_node(world, object);
if (!state->dir && graph) {
state->dir = lilv_strdup((const char*)sord_node_get_string(graph));
}
sord_iter_free(i);
} else if (sord_ask(model,
node,
world->uris.rdf_a,
world->uris.lv2_Plugin, 0)) {
// Loading plugin description as state (default state)
state->plugin_uri = lilv_node_new_from_node(world, node);
} else {
LILV_ERRORF("State %s missing lv2:appliesTo property\n",
sord_node_get_string(node));
}
// Get the state label
i = sord_search(model, node, world->uris.rdfs_label, NULL, NULL);
if (i) {
const SordNode* object = sord_iter_get_node(i, SORD_OBJECT);
const SordNode* graph = sord_iter_get_node(i, SORD_GRAPH);
state->label = lilv_strdup((const char*)sord_node_get_string(object));
if (!state->dir) {
state->dir = lilv_strdup((const char*)sord_node_get_string(graph));
}
sord_iter_free(i);
}
Sratom* sratom = sratom_new(map);
SerdChunk chunk = { NULL, 0 };
LV2_Atom_Forge forge;
lv2_atom_forge_init(&forge, map);
lv2_atom_forge_set_sink(
&forge, sratom_forge_sink, sratom_forge_deref, &chunk);
// Get port values
SordIter* ports = sord_search(model, node, world->uris.lv2_port, 0, 0);
FOREACH_MATCH(ports) {
const SordNode* port = sord_iter_get_node(ports, SORD_OBJECT);
SordNode* label = sord_get(model, port, world->uris.rdfs_label, 0, 0);
SordNode* symbol = sord_get(model, port, world->uris.lv2_symbol, 0, 0);
SordNode* value = sord_get(model, port, world->uris.pset_value, 0, 0);
if (!value) {
value = sord_get(model, port, world->uris.lv2_default, 0, 0);
}
if (!symbol) {
LILV_ERRORF("State `%s' port missing symbol.\n",
sord_node_get_string(node));
} else if (value) {
chunk.len = 0;
sratom_read(sratom, &forge, world->world, model, value);
LV2_Atom* atom = (LV2_Atom*)chunk.buf;
append_port_value(state,
(const char*)sord_node_get_string(symbol),
LV2_ATOM_BODY(atom), atom->size, atom->type);
if (label) {
lilv_state_set_label(state,
(const char*)sord_node_get_string(label));
}
}
sord_node_free(world->world, value);
sord_node_free(world->world, symbol);
sord_node_free(world->world, label);
}
sord_iter_free(ports);
// Get properties
SordNode* statep = sord_new_uri(world->world, USTR(LV2_STATE__state));
SordNode* state_node = sord_get(model, node, statep, NULL, NULL);
if (state_node) {
SordIter* props = sord_search(model, state_node, 0, 0, 0);
FOREACH_MATCH(props) {
const SordNode* p = sord_iter_get_node(props, SORD_PREDICATE);
const SordNode* o = sord_iter_get_node(props, SORD_OBJECT);
chunk.len = 0;
lv2_atom_forge_set_sink(
&forge, sratom_forge_sink, sratom_forge_deref, &chunk);
sratom_read(sratom, &forge, world->world, model, o);
LV2_Atom* atom = (LV2_Atom*)chunk.buf;
uint32_t flags = LV2_STATE_IS_POD|LV2_STATE_IS_PORTABLE;
Property prop = { NULL, 0, 0, 0, flags };
prop.key = map->map(map->handle, (const char*)sord_node_get_string(p));
prop.type = atom->type;
prop.size = atom->size;
prop.value = malloc(atom->size);
memcpy(prop.value, LV2_ATOM_BODY(atom), atom->size);
if (atom->type == forge.Path) {
prop.flags = LV2_STATE_IS_PORTABLE;
}
if (prop.value) {
state->props = (Property*)realloc(
state->props, (++state->num_props) * sizeof(Property));
state->props[state->num_props - 1] = prop;
}
}
sord_iter_free(props);
}
sord_node_free(world->world, state_node);
sord_node_free(world->world, statep);
free((void*)chunk.buf);
sratom_free(sratom);
qsort(state->props, state->num_props, sizeof(Property), property_cmp);
qsort(state->values, state->num_values, sizeof(PortValue), value_cmp);
return state;
}