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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)db_os_lseek.c 10.3 (Sleepycat) 6/28/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#endif
#include "db_int.h"
#include "os_ext.h"
/*
* __db_lseek --
* Seek to a page/byte offset in the file.
*
* PUBLIC: int __db_lseek __P((int, size_t, db_pgno_t, u_long, int));
*/
int
__db_lseek(fd, pgsize, pageno, relative, whence)
int fd;
size_t pgsize;
db_pgno_t pageno;
u_long relative;
int whence;
{
/* 64-bit offsets are done differently by different vendors. */
#undef __LSEEK_SET
#ifdef HAVE_LLSEEK
#define __LSEEK_SET
offset_t offset; /* Solaris. */
offset = pgsize * pageno + relative;
return (llseek(fd, offset, whence) == -1 ? errno : 0);
#endif
#ifdef HAVE_LSEEKI
#define __LSEEK_SET
__int64 offset; /* WNT */
offset = pgsize * pageno + relative;
return (_lseeki64(fd, offset, whence) == -1 ? errno : 0);
#endif
#ifndef __LSEEK_SET
off_t offset; /* Default. */
offset = pgsize * pageno + relative;
return (lseek(fd, offset, whence) == -1 ? errno : 0);
#endif
}
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