89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
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/***
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*clearerr.c - clear error and eof flags
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines clearerr() - clear error and eof flags from a stream
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*
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*Revision History:
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* 11-30-83 RN initial version
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* 11-02-87 JCR Multi-thread support
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* 12-11-87 JCR Added "_LOAD_DS" to declaration
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* 05-31-88 PHG Merged DLL and normal versions
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* 06-01-88 JCR Clear lowio flags as well as stdio flags
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* 02-15-90 GJF Fixed copyright and indents
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* 03-16-90 GJF Replaced _LOAD_DS with _CALLTYPE1 and added #include
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* <cruntime.h>.
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* 07-23-90 SBM Replaced <assertm.h> by <assert.h>
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* 10-02-90 GJF New-style function declarator.
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* 01-22-91 GJF ANSI naming.
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* 03-27-92 DJM POSIX support
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 09-06-94 CFW Replace MTHREAD with _MT.
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* 02-06-94 CFW assert -> _ASSERTE.
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* 03-07-95 GJF _[un]lock_str macros now take FILE * arg.
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* 06-12-95 GJF Replaced _osfile[] with _osfile() (macro referencing
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* field in ioinfo struct).
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* 07-28-95 GJF Replaced _osfile() with _osfile_safe().
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* 02-25-98 GJF Exception-safe locking.
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* 05-17-99 PML Remove all Macintosh support.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <stdio.h>
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#include <dbgint.h>
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#include <file2.h>
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#include <mtdll.h>
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#include <internal.h>
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#ifndef _POSIX_
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#include <msdos.h>
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#endif
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/***
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*void clearerr(stream) - clear error and eof flags on a stream
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*
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*Purpose:
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* Resets the error and eof indicators for a stream to 0
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*
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*Entry:
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* FILE *stream - stream to set indicators on
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*
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*Exit:
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* No return value.
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* changes the _flag field of the FILE struct.
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*
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*Exceptions:
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*
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*******************************************************************************/
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void __cdecl clearerr (
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FILE *stream
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)
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{
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_ASSERTE(stream != NULL);
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#ifdef _MT
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_lock_str(stream);
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__try {
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#endif
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/* Clear stdio level flags */
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stream->_flag &= ~(_IOERR|_IOEOF);
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/* Clear lowio level flags */
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#ifndef _POSIX_
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_osfile_safe(_fileno(stream)) &= ~(FEOFLAG);
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#endif
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#ifdef _MT
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}
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__finally {
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_unlock_str(stream);
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}
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#endif
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}
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