--- a/place.c	Fri Feb 27 00:41:46 2015 +0100
+++ b/place.c	Fri Feb 27 02:06:49 2015 +0100
@@ -154,6 +154,17 @@
 	p->column = 1;
 }
 
+void
+place_setfile(struct place *p, const char *name)
+{
+	assert(p->type == P_FILE);
+	if (strcmp(name, p->file->name) == 0) {
+		return;
+	}
+	p->file = placefile_create(&p->file->includedfrom, name,
+	    p->file->fromsystemdir);
+}
+
 const char *
 place_getname(const struct place *p)
 {