rc.xml: move nodename() to nodename.c

src/common/nodename.c

@@ -0,0 +1,37 @@
+#include <ctype.h>
+#include <string.h>
+#include "common/nodename.h"
+
+char *
+nodename(xmlNode *node, char *buf, int len)
+{
+	if (!node || !node->name) {
+		return NULL;
+	}
+
+	/* Ignore superflous 'text.' in node name */
+	if (node->parent && !strcmp((char *)node->name, "text")) {
+		node = node->parent;
+	}
+
+	char *p = buf;
+	p[--len] = 0;
+	for (;;) {
+		const char *name = (char *)node->name;
+		char c;
+		while ((c = *name++) != 0) {
+			*p++ = tolower(c);
+			if (!--len)
+				return buf;
+		}
+		*p = 0;
+		node = node->parent;
+		if (!node || !node->name) {
+			return buf;
+		}
+		*p++ = '.';
+		if (!--len) {
+			return buf;
+		}
+	}
+}