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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.
107 lines
2.6 KiB
C
107 lines
2.6 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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INDEX
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_fgetc_r
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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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#include <stdio.h>
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int _fgetc_r(struct _reent *<[ptr]>, 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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#include <stdio.h>
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int _fgetc_r(<[ptr]>, <[fp]>)
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struct _reent *<[ptr]>;
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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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The function <<_fgetc_r>> is simply a reentrant version of
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<<fgetc>> that is passed the additional reentrant structure
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pointer argument: <[ptr]>.
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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_r, (ptr, fp),
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struct _reent * ptr _AND
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FILE * fp)
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{
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int result;
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CHECK_INIT(ptr, fp);
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_flockfile (fp);
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result = __sgetc_r (ptr, fp);
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_funlockfile (fp);
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return result;
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}
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#ifndef _REENT_ONLY
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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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#if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__)
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int result;
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CHECK_INIT(_REENT, fp);
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_flockfile (fp);
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result = __sgetc_r (_REENT, fp);
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_funlockfile (fp);
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return result;
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#else
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return _fgetc_r (_REENT, fp);
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#endif
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}
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#endif /* !_REENT_ONLY */
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