granicus.if.org Git - postgresql/blob - src/backend/access/rmgrdesc/clogdesc.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * clogdesc.c
   4  *    rmgr descriptor routines for access/transam/clog.c
   5  *
   6  * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  *
  10  * IDENTIFICATION
  11  *    src/backend/access/rmgrdesc/clogdesc.c
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #include "postgres.h"
  16
  17 #include "access/clog.h"
  18
  19
  20 void
  21 clog_desc(StringInfo buf, uint8 xl_info, char *rec)
  22 {
  23         uint8           info = xl_info & ~XLR_INFO_MASK;
  24
  25         if (info == CLOG_ZEROPAGE)
  26         {
  27                 int                     pageno;
  28
  29                 memcpy(&pageno, rec, sizeof(int));
  30                 appendStringInfo(buf, "zeropage: %d", pageno);
  31         }
  32         else if (info == CLOG_TRUNCATE)
  33         {
  34                 int                     pageno;
  35
  36                 memcpy(&pageno, rec, sizeof(int));
  37                 appendStringInfo(buf, "truncate before: %d", pageno);
  38         }
  39         else
  40                 appendStringInfo(buf, "UNKNOWN");
  41 }