defconf: Add data types and value defines

Signed-off-by: Chloe M. <chloe@aptel.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/head/defconf/data.h b/head/defconf/data.h
new file mode 100644
index 0000000..5712857
--- /dev/null
+++ b/head/defconf/data.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2026, Apollo Telephone Laboratories.
+ * Provided under the BSD-3 clause.
+ */
+
+#ifndef DEFCONF_DATA_H
+#define DEFCONF_DATA_H 1
+
+#include <stdint.h>
+#include <stddef.h>
+
+/*
+ * Represents valid data types
+ *
+ * @DATA_TYPE_INT:  Data is integer
+ * @DATA_TYPE_STR:  Data is string
+ */
+typedef enum {
+    DATA_TYPE_INT,
+    DATA_TYPE_STR
+} data_type_t;
+
+/*
+ * Represents data that has been used within the config
+ *
+ * @type:  Type of data
+ * @v:     Used if data is an integer
+ * @s:     Used if data is a string
+ */
+struct data_value {
+    data_type_t type;
+    union {
+        size_t v;
+        char *s;
+    };
+};
+
+#endif  /* !DEFCONF_DATA_H */