e5e148d15b
* libc/include/stdio.h[_REENT_SMALL]: Do not allow macros
for clearerr, feof, or fileno.
* libc/include/sys/reent.h[_REENT_SMALL](struct _reent): Change
the dummy std stream scheme to use pointers to const external
fake files, one for each standard stream.
* libc/stdio/local.h (CHECK_INIT): Change to take a file pointer
argument. For _REENT_SMALL, reset the file pointer if it
matches one of the fake std stream pointers.
* libc/stdio/clearerr.c: Fix CHECK_INIT macro to add file pointer
argument.
* libc/stdio/fclose.c: Ditto.
* libc/stdio/feof.c: Ditto.
* libc/stdio/ferror.c: Ditto.
* libc/stdio/fflush.c: Ditto.
* libc/stdio/fgetc.c: Ditto.
* libc/stdio/fgets.c: Ditto.
* libc/stdio/fileno.c: Ditto.
* libc/stdio/findfp.c: Ditto.
* libc/stdio/fputc.c: Ditto.
* libc/stdio/fputs.c: Ditto.
* libc/stdio/fread.c: Ditto.
* libc/stdio/freopen.c: Ditto.
* libc/stdio/fseek.c: Ditto.
* libc/stdio/ftell.c: Ditto.
* libc/stdio/fwrite.c: Ditto.
* libc/stdio/getc.c: Ditto.
* libc/stdio/getdelim.c: Ditto.
* libc/stdio/putc.c: Ditto.
* libc/stdio/refill.c: Ditto.
* libc/stdio/setvbuf.c: Ditto.
* libc/stdio/ungetc.c: Ditto.
* libc/stdio/vfprintf.c: Ditto.
* libc/stdio/vfscanf.c: Ditto.
* libc/stdio/wbuf.c: Ditto.: Ditto.
* libc/stdio/wsetup.c: Ditto.
* libc/stdio64/freopen64.c: Ditto.
* libc/stdio64/fseeko64.c: Ditto.
* libc/stdio64/ftello64.c: Ditto.
* libc/machine/powerpc/vfprintf.c: Ditto.
* libc/machine/powerpc/vfscanf.c: Ditto.
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms are permitted
|
|
* provided that the above copyright notice and this paragraph are
|
|
* duplicated in all such forms and that any documentation,
|
|
* advertising materials, and other materials related to such
|
|
* distribution and use acknowledge that the software was developed
|
|
* by the University of California, Berkeley. The name of the
|
|
* University may not be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<clearerr>>---clear file or stream error indicator
|
|
|
|
INDEX
|
|
clearerr
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdio.h>
|
|
void clearerr(FILE *<[fp]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <stdio.h>
|
|
void clearerr(<[fp]>)
|
|
FILE *<[fp]>;
|
|
|
|
DESCRIPTION
|
|
The <<stdio>> functions maintain an error indicator with each file
|
|
pointer <[fp]>, to record whether any read or write errors have
|
|
occurred on the associated file or stream. Similarly, it maintains an
|
|
end-of-file indicator to record whether there is no more data in the
|
|
file.
|
|
|
|
Use <<clearerr>> to reset both of these indicators.
|
|
|
|
See <<ferror>> and <<feof>> to query the two indicators.
|
|
|
|
|
|
RETURNS
|
|
<<clearerr>> does not return a result.
|
|
|
|
PORTABILITY
|
|
ANSI C requires <<clearerr>>.
|
|
|
|
No supporting OS subroutines are required.
|
|
*/
|
|
|
|
#include <_ansi.h>
|
|
#include <stdio.h>
|
|
#include "local.h"
|
|
|
|
/* A subroutine version of the macro clearerr. */
|
|
|
|
#undef clearerr
|
|
|
|
_VOID
|
|
_DEFUN(clearerr, (fp),
|
|
FILE * fp)
|
|
{
|
|
CHECK_INIT(_REENT, fp);
|
|
_flockfile (fp);
|
|
__sclearerr (fp);
|
|
_funlockfile (fp);
|
|
}
|