toolchain: replace ifc interface compiler with xpcg

xpcg is used to generate xpc interfaces

toolchain/xpcg/msg.h

@@ -0,0 +1,44 @@
+#ifndef XPCG_MSG_H_
+#define XPCG_MSG_H_
+
+#include <blue/core/queue.h>
+
+struct type;
+
+struct msg_parameter {
+	char *p_name;
+	const struct type *p_type;
+	b_queue_entry p_entry;
+};
+
+struct msg_definition {
+	char *msg_name;
+	long long msg_id;
+	b_queue_entry msg_entry;
+
+	b_queue msg_params;
+	b_queue msg_results;
+};
+
+extern struct msg_definition *msg_definition_create(
+	const char *name,
+	long long id);
+extern void msg_definition_destroy(struct msg_definition *msg);
+
+extern bool msg_definition_has_param(
+	struct msg_definition *msg,
+	const char *name);
+extern bool msg_definition_has_result(
+	struct msg_definition *msg,
+	const char *name);
+
+extern int msg_definition_add_param(
+	struct msg_definition *msg,
+	const struct type *type,
+	const char *name);
+extern int msg_definition_add_result(
+	struct msg_definition *msg,
+	const struct type *type,
+	const char *name);
+
+#endif