121 lines
3.5 KiB
C
121 lines
3.5 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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* and/or 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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<<fputc>>, <<fputc_unlocked>>---write a character on a stream or file
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INDEX
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fputc
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INDEX
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fputc_unlocked
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INDEX
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_fputc_r
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INDEX
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_fputc_unlocked_r
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SYNOPSIS
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#include <stdio.h>
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int fputc(int <[ch]>, FILE *<[fp]>);
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#define _BSD_SOURCE
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#include <stdio.h>
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int fputc_unlocked(int <[ch]>, FILE *<[fp]>);
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#include <stdio.h>
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int _fputc_r(struct _rent *<[ptr]>, int <[ch]>, FILE *<[fp]>);
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#include <stdio.h>
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int _fputc_unlocked_r(struct _rent *<[ptr]>, int <[ch]>, FILE *<[fp]>);
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DESCRIPTION
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<<fputc>> converts the argument <[ch]> from an <<int>> to an
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<<unsigned char>>, then writes it to the file or stream identified by
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<[fp]>.
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If the file was opened with append mode (or if the stream cannot
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support positioning), then the new character goes at the end of the
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file or stream. Otherwise, the new character is written at the
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current value of the position indicator, and the position indicator
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oadvances by one.
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For a macro version of this function, see <<putc>>.
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<<fputc_unlocked>> is a non-thread-safe version of <<fputc>>.
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<<fputc_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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<<fputc_unlocked>> is equivalent to <<fputc>>.
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The <<_fputc_r>> and <<_fputc_unlocked_r>> functions are simply reentrant
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versions of the above that take an additional reentrant structure
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argument: <[ptr]>.
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RETURNS
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If successful, <<fputc>> returns its argument <[ch]>. If an error
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intervenes, the result is <<EOF>>. You can use `<<ferror(<[fp]>)>>' to
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query for errors.
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PORTABILITY
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<<fputc>> is required by ANSI C.
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<<fputc_unlocked>> is a BSD extension also provided by GNU libc.
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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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_fputc_r (struct _reent *ptr,
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int ch,
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FILE * file)
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{
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int result;
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CHECK_INIT(ptr, file);
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_newlib_flockfile_start (file);
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result = _putc_r (ptr, ch, file);
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_newlib_flockfile_end (file);
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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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fputc (int ch,
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FILE * file)
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{
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#if !defined(__OPTIMIZE_SIZE__) && !defined(PREFER_SIZE_OVER_SPEED)
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int result;
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struct _reent *reent = _REENT;
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CHECK_INIT(reent, file);
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_newlib_flockfile_start (file);
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result = _putc_r (reent, ch, file);
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_newlib_flockfile_end (file);
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return result;
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#else
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return _fputc_r (_REENT, ch, file);
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#endif
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}
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#endif /* !_REENT_ONLY */
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