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-rw-r--r--src/port.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/src/port.c b/src/port.c
index 9166fcc..cffbd0e 100644
--- a/src/port.c
+++ b/src/port.c
@@ -150,6 +150,44 @@ slv2_port_get_value_by_qname(SLV2Plugin p,
}
+SLV2Values
+slv2_port_get_value(SLV2Plugin p,
+ SLV2Port port,
+ SLV2Value predicate)
+{
+ char* query = NULL;
+
+ /* Hack around broken RASQAL, full URI predicates don't work :/ */
+
+ if (predicate->type == SLV2_VALUE_URI) {
+ query = slv2_strjoin(
+ "PREFIX slv2predicate: <", slv2_value_as_string(predicate), ">",
+ "SELECT DISTINCT ?value WHERE { \n"
+ "<", slv2_value_as_uri(p->plugin_uri), "> lv2:port ?port .\n"
+ "?port lv2:symbol \"", slv2_value_as_string(port->symbol), "\";\n\t",
+ " slv2predicate: ?value .\n"
+ "}\n", NULL);
+ } else if (predicate->type == SLV2_VALUE_QNAME) {
+ query = slv2_strjoin(
+ "SELECT DISTINCT ?value WHERE { \n"
+ "<", slv2_value_as_uri(p->plugin_uri), "> lv2:port ?port .\n"
+ "?port lv2:symbol \"", slv2_value_as_string(port->symbol), "\";\n\t",
+ slv2_value_as_string(predicate), " ?value .\n"
+ "}\n", NULL);
+ } else {
+ fprintf(stderr, "slv2_port_get_value error: "
+ "predicate is not a URI or QNAME\n");
+ return NULL;
+ }
+
+ SLV2Values result = slv2_plugin_query_variable(p, query, 0);
+
+ free(query);
+
+ return result;
+}
+
+
SLV2Value
slv2_port_get_symbol(SLV2Plugin p,
SLV2Port port)