1 files changed, 57 insertions, 0 deletions
diff --git a/src/backend/access/rmgrdesc/rmgrdesc_utils.c b/src/backend/access/rmgrdesc/rmgrdesc_utils.c
new file mode 100644
index 0000000..90051f0
--- /dev/null
+++ b/src/backend/access/rmgrdesc/rmgrdesc_utils.c
@@ -0,0 +1,57 @@
+/*-------------------------------------------------------------------------
+ *
+ * rmgrdesc_utils.c
+ *	  Support functions for rmgrdesc routines
+ *
+ * Copyright (c) 2023, PostgreSQL Global Development Group
+ *
+ *
+ * IDENTIFICATION
+ *	  src/backend/access/rmgrdesc/rmgrdesc_utils.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/rmgrdesc_utils.h"
+#include "storage/off.h"
+
+void
+array_desc(StringInfo buf, void *array, size_t elem_size, int count,
+		   void (*elem_desc) (StringInfo buf, void *elem, void *data),
+		   void *data)
+{
+	if (count == 0)
+	{
+		appendStringInfoString(buf, " []");
+		return;
+	}
+	appendStringInfoString(buf, " [");
+	for (int i = 0; i < count; i++)
+	{
+		elem_desc(buf, (char *) array + elem_size * i, data);
+		if (i < count - 1)
+			appendStringInfoString(buf, ", ");
+	}
+	appendStringInfoString(buf, "]");
+}
+
+void
+offset_elem_desc(StringInfo buf, void *offset, void *data)
+{
+	appendStringInfo(buf, "%u", *(OffsetNumber *) offset);
+}
+
+void
+redirect_elem_desc(StringInfo buf, void *offset, void *data)
+{
+	OffsetNumber *new_offset = (OffsetNumber *) offset;
+
+	appendStringInfo(buf, "%u->%u", new_offset[0], new_offset[1]);
+}
+
+void
+oid_elem_desc(StringInfo buf, void *relid, void *data)
+{
+	appendStringInfo(buf, "%u", *(Oid *) relid);
+}