os-util: move declaration of string table lookup for image class

src/basic/os-util.c

@@ -14,11 +14,21 @@
 #include "parse-util.h"
 #include "path-util.h"
 #include "stat-util.h"
+#include "string-table.h"
 #include "string-util.h"
 #include "strv.h"
 #include "utf8.h"
 #include "xattr-util.h"
 
+static const char* const image_class_table[_IMAGE_CLASS_MAX] = {
+        [IMAGE_MACHINE]  = "machine",
+        [IMAGE_PORTABLE] = "portable",
+        [IMAGE_SYSEXT]   = "extension",
+        [IMAGE_CONFEXT]  = "confext",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(image_class, ImageClass);
+
 /* Helper struct for naming simplicity and reusability */
 static const struct {
         const char *release_file_directory;

src/basic/os-util.h

@@ -5,6 +5,7 @@
 #include <stdio.h>
 
 #include "time-util.h"
+
 typedef enum ImageClass {
         IMAGE_MACHINE,
         IMAGE_PORTABLE,