Start of generic editable string support

src/include/gpxe/editstring.h

@@ -0,0 +1,22 @@
+#ifndef _EDITSTRING_H
+#define _EDITSTRING_H
+
+/** @file
+ *
+ * Editable strings
+ *
+ */
+
+/** An editable string */
+struct edit_string {
+	/** Buffer for string */
+	char *buf;
+	/** Size of buffer (including terminating NUL) */
+	size_t len;
+	/** Cursor position */
+	unsigned int cursor;
+};
+
+extern int edit_string ( struct edit_string *string, int key );
+
+#endif /* _EDITSTRING_H */