1 files changed, 56 insertions, 0 deletions
diff --git a/src/backend/access/rmgrdesc/genericdesc.c b/src/backend/access/rmgrdesc/genericdesc.c
new file mode 100644
index 0000000..877beb5
--- /dev/null
+++ b/src/backend/access/rmgrdesc/genericdesc.c
@@ -0,0 +1,56 @@
+/*-------------------------------------------------------------------------
+ *
+ * genericdesc.c
+ *	  rmgr descriptor routines for access/transam/generic_xlog.c
+ *
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/backend/access/rmgrdesc/genericdesc.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/generic_xlog.h"
+#include "lib/stringinfo.h"
+#include "storage/relfilenode.h"
+
+/*
+ * Description of generic xlog record: write page regions that this record
+ * overrides.
+ */
+void
+generic_desc(StringInfo buf, XLogReaderState *record)
+{
+	Pointer		ptr = XLogRecGetData(record),
+				end = ptr + XLogRecGetDataLen(record);
+
+	while (ptr < end)
+	{
+		OffsetNumber offset,
+					length;
+
+		memcpy(&offset, ptr, sizeof(offset));
+		ptr += sizeof(offset);
+		memcpy(&length, ptr, sizeof(length));
+		ptr += sizeof(length);
+		ptr += length;
+
+		if (ptr < end)
+			appendStringInfo(buf, "offset %u, length %u; ", offset, length);
+		else
+			appendStringInfo(buf, "offset %u, length %u", offset, length);
+	}
+}
+
+/*
+ * Identification of generic xlog record: we don't distinguish any subtypes
+ * inside generic xlog records.
+ */
+const char *
+generic_identify(uint8 info)
+{
+	return "Generic";
+}