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) 1996-2017, 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/relfilenode.h"
      19             : 
      20             : /*
      21             :  * Description of generic xlog record: write page regions that this record
      22             :  * overrides.
      23             :  */
      24             : void
      25           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             : 
      47           0 :     return;
      48             : }
      49             : 
      50             : /*
      51             :  * Identification of generic xlog record: we don't distinguish any subtypes
      52             :  * inside generic xlog records.
      53             :  */
      54             : const char *
      55           0 : generic_identify(uint8 info)
      56             : {
      57           0 :     return "Generic";
      58             : }