pg_lsn.h File Reference

#include "access/xlogdefs.h"
#include "fmgr.h"

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Macros
#define	DatumGetLSN(X)   ((XLogRecPtr) DatumGetInt64(X))
#define	LSNGetDatum(X)   (Int64GetDatum((int64) (X)))
#define	PG_GETARG_LSN(n)   DatumGetLSN(PG_GETARG_DATUM(n))
#define	PG_RETURN_LSN(x)   return LSNGetDatum(x)

Functions
XLogRecPtr	pg_lsn_in_internal (const char *str, bool *have_error)

Macro Definition Documentation

DatumGetLSN

#define DatumGetLSN

(

X

)

((XLogRecPtr) DatumGetInt64(X))

Definition at line 21 of file pg_lsn.h.

LSNGetDatum

#define LSNGetDatum

(

X

)

(Int64GetDatum((int64) (X)))

Definition at line 22 of file pg_lsn.h.

PG_GETARG_LSN

#define PG_GETARG_LSN

(

n

)

DatumGetLSN(PG_GETARG_DATUM(n))

Definition at line 24 of file pg_lsn.h.

PG_RETURN_LSN

#define PG_RETURN_LSN

(

x

)

return LSNGetDatum(x)

Definition at line 25 of file pg_lsn.h.

Function Documentation

pg_lsn_in_internal()

XLogRecPtr pg_lsn_in_internal	(	const char *	str,
		bool *	have_error
	)

Definition at line 30 of file pg_lsn.c.

{
    int         len1,
                len2;
    uint32      id,
                off;
    XLogRecPtr  result;
 
    Assert(have_error != NULL);
    *have_error = false;
 
    /* Sanity check input format. */
    len1 = strspn(str, "0123456789abcdefABCDEF");
    if (len1 < 1 || len1 > MAXPG_LSNCOMPONENT || str[len1] != '/')
    {
        *have_error = true;
        return InvalidXLogRecPtr;
    }
    len2 = strspn(str + len1 + 1, "0123456789abcdefABCDEF");
    if (len2 < 1 || len2 > MAXPG_LSNCOMPONENT || str[len1 + 1 + len2] != '\0')
    {
        *have_error = true;
        return InvalidXLogRecPtr;
    }
 
    /* Decode result. */
    id = (uint32) strtoul(str, NULL, 16);
    off = (uint32) strtoul(str + len1 + 1, NULL, 16);
    result = ((uint64) id << 32) | off;
 
    return result;
}

References Assert(), InvalidXLogRecPtr, MAXPG_LSNCOMPONENT, and generate_unaccent_rules::str.

Referenced by check_recovery_target_lsn(), and pg_lsn_in().