1 files changed, 35 insertions, 0 deletions
diff --git a/contrib/isn/isn.h b/contrib/isn/isn.h
new file mode 100644
index 0000000..f3f8ee0
--- /dev/null
+++ b/contrib/isn/isn.h
@@ -0,0 +1,35 @@
+/*-------------------------------------------------------------------------
+ *
+ * isn.h
+ *	  PostgreSQL type definitions for ISNs (ISBN, ISMN, ISSN, EAN13, UPC)
+ *
+ * Author:	German Mendez Bravo (Kronuz)
+ * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *	  contrib/isn/isn.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef ISN_H
+#define ISN_H
+
+#include "fmgr.h"
+
+#undef ISN_DEBUG
+#define ISN_WEAK_MODE
+
+/*
+ *	uint64 is the internal storage format for ISNs.
+ */
+typedef uint64 ean13;
+
+#define EAN13_FORMAT UINT64_FORMAT
+
+#define PG_GETARG_EAN13(n) PG_GETARG_INT64(n)
+#define PG_RETURN_EAN13(x) PG_RETURN_INT64(x)
+
+extern void initialize(void);
+
+#endif							/* ISN_H */