/*-------------------------------------------------------------------------

 *

 * genericdesc.c

 *    rmgr descriptor routines for access/transam/generic_xlog.c

 *

 *

 * Portions Copyright (c) 1996-2025, 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"

/*

 * 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";

}