93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
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/*-------------------------------------------------------------------------
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*
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* tid.c--
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* Functions for the built-in type tuple id
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/tid.c,v 1.1.1.1 1996/07/09 06:22:05 scrappy Exp $
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*
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* NOTES
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* input routine largely stolen from boxin().
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*
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*-------------------------------------------------------------------------
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*/
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#include <stdio.h> /* for sprintf() */
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#include <string.h>
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#include "postgres.h"
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#include "storage/block.h"
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#include "storage/off.h"
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#include "storage/itemptr.h"
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#include "storage/bufpage.h"
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#include "utils/palloc.h"
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#include "utils/builtins.h" /* where function declarations go */
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#define LDELIM '('
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#define RDELIM ')'
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#define DELIM ','
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#define NTIDARGS 2
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/* ----------------------------------------------------------------
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* tidin
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* ----------------------------------------------------------------
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*/
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ItemPointer
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tidin(char *str)
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{
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char *p, *coord[NTIDARGS];
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int i;
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ItemPointer result;
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BlockNumber blockNumber;
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OffsetNumber offsetNumber;
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if (str == NULL)
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return NULL;
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for (i = 0, p = str; *p && i < NTIDARGS && *p != RDELIM; p++)
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if (*p == DELIM || (*p == LDELIM && !i))
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coord[i++] = p + 1;
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if (i < NTIDARGS - 1)
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return NULL;
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blockNumber = (BlockNumber) atoi(coord[0]);
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offsetNumber = (OffsetNumber) atoi(coord[1]);
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result = (ItemPointer) palloc(sizeof(ItemPointerData));
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ItemPointerSet(result, blockNumber, offsetNumber);
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return result;
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}
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/* ----------------------------------------------------------------
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* tidout
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* ----------------------------------------------------------------
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*/
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char *
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tidout(ItemPointer itemPtr)
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{
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BlockNumber blockNumber;
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OffsetNumber offsetNumber;
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BlockId blockId;
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char buf[32];
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char *str;
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blockId = &(itemPtr->ip_blkid);
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blockNumber = BlockIdGetBlockNumber(blockId);
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offsetNumber = itemPtr->ip_posid;
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sprintf(buf, "(%d,%d)", blockNumber, offsetNumber);
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str = (char *) palloc(strlen(buf)+1);
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strcpy(str, buf);
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return str;
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}
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