forked from KolibriOS/kolibrios
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<feof>>, <<feof_unlocked>>---test for end of file
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INDEX
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feof
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INDEX
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feof_unlocked
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ANSI_SYNOPSIS
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#include <stdio.h>
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int feof(FILE *<[fp]>);
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#define _BSD_SOURCE
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#include <stdio.h>
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int feof_unlocked(FILE *<[fp]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int feof(<[fp]>)
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FILE *<[fp]>;
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#define _BSD_SOURCE
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#include <stdio.h>
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int feof_unlocked(<[fp]>)
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FILE *<[fp]>;
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DESCRIPTION
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<<feof>> tests whether or not the end of the file identified by <[fp]>
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has been reached.
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<<feof_unlocked>> is a non-thread-safe version of <<feof>>.
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<<feof_unlocked>> may only safely be used within a scope
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protected by flockfile() (or ftrylockfile()) and funlockfile(). This
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function may safely be used in a multi-threaded program if and only
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if they are called while the invoking thread owns the (FILE *)
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object, as is the case after a successful call to the flockfile() or
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ftrylockfile() functions. If threads are disabled, then
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<<feof_unlocked>> is equivalent to <<feof>>.
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RETURNS
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<<feof>> returns <<0>> if the end of file has not yet been reached; if
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at end of file, the result is nonzero.
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PORTABILITY
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<<feof>> is required by ANSI C.
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<<feof_unlocked>> is a BSD extension also provided by GNU libc.
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No supporting OS subroutines are required.
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*/
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#include <stdio.h>
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#include "local.h"
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/* A subroutine version of the macro feof. */
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#undef feof
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int
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_DEFUN(feof, (fp),
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FILE * fp)
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{
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int result;
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CHECK_INIT(_REENT, fp);
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_newlib_flockfile_start (fp);
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result = __sfeof (fp);
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_newlib_flockfile_end (fp);
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return result;
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}
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