mie: select: add support for target-specific nodes and lowering operations

mie/select/node.c

@@ -1,5 +1,6 @@
 #include "builder.h"
 
+#include <blue/core/stringstream.h>
 #include <mie/select/graph.h>
 #include <mie/select/node.h>
 #include <mie/select/opcode.h>
@@ -129,6 +130,43 @@ void mie_select_node_get_uses(
 {
 }
 
+enum mie_status mie_select_node_get_value(
+	struct mie_select_node *node, struct mie_type *type, size_t index,
+	struct mie_select_value *out)
+{
+	for (size_t i = 0; i < node->n_nr_results; i++) {
+		if (!mie_type_compare(node->n_results[i], type)) {
+			continue;
+		}
+
+		if (index > 0) {
+			index--;
+			continue;
+		}
+
+		out->v_node = node;
+		out->v_index = i;
+		return MIE_SUCCESS;
+	}
+
+	memset(out, 0x0, sizeof *out);
+	return MIE_ERR_NO_ENTRY;
+}
+
+enum mie_status mie_select_node_set_description(
+	struct mie_select_node *node, const char *format, ...)
+{
+	va_list arg;
+	va_start(arg, format);
+	b_stringstream str;
+	b_stringstream_begin_dynamic(&str);
+	b_stringstream_addvf(&str, format, arg);
+	va_end(arg);
+
+	node->n_description = b_stringstream_end(&str);
+	return node->n_description ? MIE_SUCCESS : MIE_ERR_NO_MEMORY;
+}
+
 struct mie_select_node *mie_select_node_get_glued_node(struct mie_select_node *node)
 {
 	return NULL;