TLA  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) 1996-2023, 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                 : #include "storage/relfilelocator.h"
      19                 : 
      20                 : /*
      21                 :  * Description of generic xlog record: write page regions that this record
      22                 :  * overrides.
      23                 :  */
      24                 : void
      25 UBC           0 : generic_desc(StringInfo buf, XLogReaderState *record)
      26                 : {
      27               0 :     Pointer     ptr = XLogRecGetData(record),
      28               0 :                 end = ptr + XLogRecGetDataLen(record);
      29                 : 
      30               0 :     while (ptr < end)
      31                 :     {
      32                 :         OffsetNumber offset,
      33                 :                     length;
      34                 : 
      35               0 :         memcpy(&offset, ptr, sizeof(offset));
      36               0 :         ptr += sizeof(offset);
      37               0 :         memcpy(&length, ptr, sizeof(length));
      38               0 :         ptr += sizeof(length);
      39               0 :         ptr += length;
      40                 : 
      41               0 :         if (ptr < end)
      42               0 :             appendStringInfo(buf, "offset %u, length %u; ", offset, length);
      43                 :         else
      44               0 :             appendStringInfo(buf, "offset %u, length %u", offset, length);
      45                 :     }
      46               0 : }
      47                 : 
      48                 : /*
      49                 :  * Identification of generic xlog record: we don't distinguish any subtypes
      50                 :  * inside generic xlog records.
      51                 :  */
      52                 : const char *
      53               0 : generic_identify(uint8 info)
      54                 : {
      55               0 :     return "Generic";
      56                 : }