71 lines
1.9 KiB
C
71 lines
1.9 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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<<fgetc>>---get a character from a file or stream
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INDEX
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fgetc
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ANSI_SYNOPSIS
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#include <stdio.h>
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int fgetc(FILE *<[fp]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int fgetc(<[fp]>)
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FILE *<[fp]>;
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DESCRIPTION
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Use <<fgetc>> to get the next single character from the file or stream
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identified by <[fp]>. As a side effect, <<fgetc>> advances the file's
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current position indicator.
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For a macro version of this function, see <<getc>>.
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RETURNS
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The next character (read as an <<unsigned char>>, and cast to
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<<int>>), unless there is no more data, or the host system reports a
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read error; in either of these situations, <<fgetc>> returns <<EOF>>.
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You can distinguish the two situations that cause an <<EOF>> result by
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using the <<ferror>> and <<feof>> functions.
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PORTABILITY
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ANSI C requires <<fgetc>>.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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#include <_ansi.h>
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#include <stdio.h>
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#include "local.h"
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int
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_DEFUN(fgetc, (fp),
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FILE * fp)
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{
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int result;
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CHECK_INIT(_REENT);
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_flockfile (fp);
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result = __sgetc (fp);
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_funlockfile (fp);
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return result;
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}
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