windows-nt/Source/XPSP1/NT/base/crts/crtw32/lowio/tell.c
2020-09-26 16:20:57 +08:00

55 lines
1.7 KiB
C

/***
*tell.c - find file position
*
* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
*
*Purpose:
* contains _tell() - find file position
*
*Revision History:
* 09-02-83 RN initial version
* 12-11-87 JCR Added "_LOAD_DS" to declaration
* 03-13-90 GJF Replaced _LOAD_DS with _CALLTYPE1, added #include
* <cruntime.h> and fixed the copyright. Also, cleaned
* up the formatting a bit.
* 10-01-90 GJF New-style function declarator.
* 01-17-91 GJF ANSI naming.
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
* 02-15-95 GJF Appended Mac version of source file (somewhat cleaned
* up), with appropriate #ifdef-s.
* 07-09-96 GJF Replaced defined(_WIN32) with !defined(_MAC) and
* defined(_M_M68K) || defined(_M_MPPC) with
* defined(_MAC). Also, detab-ed and cleaned up the
* format a bit.
* 05-17-99 PML Remove all Macintosh support.
*
*******************************************************************************/
#include <cruntime.h>
#include <io.h>
/***
*long _tell(filedes) - find file position
*
*Purpose:
* Gets the current position of the file pointer (no adjustment
* for buffering).
*
*Entry:
* int filedes - file handle of file
*
*Exit:
* returns file position or -1L (sets errno) if bad file descriptor or
* pipe
*
*Exceptions:
*
*******************************************************************************/
long __cdecl _tell (
int filedes
)
{
return(_lseek(filedes,0L,1));
}