Line data    Source code

       1              : /*-------------------------------------------------------------------------
       2              :  *
       3              :  * genericdesc.c
       4              :  *    rmgr descriptor routines for access/transam/generic_xlog.c
       5              :  *
       6              :  *
       7              :  * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
       8              :  * Portions Copyright (c) 1994, Regents of the University of California
       9              :  *
      10              :  * src/backend/access/rmgrdesc/genericdesc.c
      11              :  *
      12              :  *-------------------------------------------------------------------------
      13              :  */
      14              : #include "postgres.h"
      15              : 
      16              : #include "access/generic_xlog.h"
      17              : #include "lib/stringinfo.h"
      18              : 
      19              : /*
      20              :  * Description of generic xlog record: write page regions that this record
      21              :  * overrides.
      22              :  */
      23              : void
      24            0 : generic_desc(StringInfo buf, XLogReaderState *record)
      25              : {
      26            0 :     const char *ptr = XLogRecGetData(record);
      27            0 :     const char *end = ptr + XLogRecGetDataLen(record);
      28              : 
      29            0 :     while (ptr < end)
      30              :     {
      31              :         OffsetNumber offset,
      32              :                     length;
      33              : 
      34            0 :         memcpy(&offset, ptr, sizeof(offset));
      35            0 :         ptr += sizeof(offset);
      36            0 :         memcpy(&length, ptr, sizeof(length));
      37            0 :         ptr += sizeof(length);
      38            0 :         ptr += length;
      39              : 
      40            0 :         if (ptr < end)
      41            0 :             appendStringInfo(buf, "offset %u, length %u; ", offset, length);
      42              :         else
      43            0 :             appendStringInfo(buf, "offset %u, length %u", offset, length);
      44              :     }
      45            0 : }
      46              : 
      47              : /*
      48              :  * Identification of generic xlog record: we don't distinguish any subtypes
      49              :  * inside generic xlog records.
      50              :  */
      51              : const char *
      52            0 : generic_identify(uint8 info)
      53              : {
      54            0 :     return "Generic";
      55              : }