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/*-------------------------------------------------------------------------
*
* tid.c
* Functions for the built-in type tuple id
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/tid.c,v 1.6.2.1 1999/08/02 05:24:57 scrappy Exp $
*
* NOTES
* input routine largely stolen from boxin().
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/builtins.h"
#define LDELIM '('
#define RDELIM ')'
#define DELIM ','
#define NTIDARGS 2
/* ----------------------------------------------------------------
* tidin
* ----------------------------------------------------------------
*/
ItemPointer
tidin(char *str)
{
char *p,
*coord[NTIDARGS];
int i;
ItemPointer result;
BlockNumber blockNumber;
OffsetNumber offsetNumber;
if (str == NULL)
return NULL;
for (i = 0, p = str; *p && i < NTIDARGS && *p != RDELIM; p++)
if (*p == DELIM || (*p == LDELIM && !i))
coord[i++] = p + 1;
if (i < NTIDARGS - 1)
return NULL;
blockNumber = (BlockNumber) atoi(coord[0]);
offsetNumber = (OffsetNumber) atoi(coord[1]);
result = (ItemPointer) palloc(sizeof(ItemPointerData));
ItemPointerSet(result, blockNumber, offsetNumber);
return result;
}
/* ----------------------------------------------------------------
* tidout
* ----------------------------------------------------------------
*/
char *
tidout(ItemPointer itemPtr)
{
BlockNumber blockNumber;
OffsetNumber offsetNumber;
BlockId blockId;
char buf[32];
char *str;
blockId = &(itemPtr->ip_blkid);
blockNumber = BlockIdGetBlockNumber(blockId);
offsetNumber = itemPtr->ip_posid;
sprintf(buf, "(%d,%d)", blockNumber, offsetNumber);
str = (char *) palloc(strlen(buf) + 1);
strcpy(str, buf);
return str;
}
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