mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-11 19:49:32 +00:00
95 lines
2.8 KiB
C
95 lines
2.8 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.
|
|
*/
|
|
/* No user fns here. Pesch 15apr92. */
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "%W% (Berkeley) %G%";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <_ansi.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include "local.h"
|
|
#include "fvwrite.h"
|
|
|
|
/*
|
|
* Write the given character into the (probably full) buffer for
|
|
* the given file. Flush the buffer out if it is or becomes full,
|
|
* or if c=='\n' and the file is line buffered.
|
|
*/
|
|
|
|
int
|
|
__swbuf_r (struct _reent *ptr,
|
|
register int c,
|
|
register FILE *fp)
|
|
{
|
|
register int n;
|
|
|
|
/* Ensure stdio has been initialized. */
|
|
|
|
CHECK_INIT (ptr, fp);
|
|
|
|
/*
|
|
* In case we cannot write, or longjmp takes us out early,
|
|
* make sure _w is 0 (if fully- or un-buffered) or -_bf._size
|
|
* (if line buffered) so that we will get called again.
|
|
* If we did not do this, a sufficient number of putc()
|
|
* calls might wrap _w from negative to positive.
|
|
*/
|
|
|
|
fp->_w = fp->_lbfsize;
|
|
if (cantwrite (ptr, fp))
|
|
return EOF;
|
|
c = (unsigned char) c;
|
|
|
|
ORIENT (fp, -1);
|
|
|
|
/*
|
|
* If it is completely full, flush it out. Then, in any case,
|
|
* stuff c into the buffer. If this causes the buffer to fill
|
|
* completely, or if c is '\n' and the file is line buffered,
|
|
* flush it (perhaps a second time). The second flush will always
|
|
* happen on unbuffered streams, where _bf._size==1; fflush()
|
|
* guarantees that putc() will always call wbuf() by setting _w
|
|
* to 0, so we need not do anything else.
|
|
*/
|
|
|
|
n = fp->_p - fp->_bf._base;
|
|
if (n >= fp->_bf._size)
|
|
{
|
|
if (_fflush_r (ptr, fp))
|
|
return EOF;
|
|
n = 0;
|
|
}
|
|
fp->_w--;
|
|
*fp->_p++ = c;
|
|
if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))
|
|
if (_fflush_r (ptr, fp))
|
|
return EOF;
|
|
return c;
|
|
}
|
|
|
|
/* This function isn't any longer declared in stdio.h, but it's
|
|
required for backward compatibility with applications built against
|
|
earlier dynamically built newlib libraries. */
|
|
int
|
|
__swbuf (register int c,
|
|
register FILE *fp)
|
|
{
|
|
return __swbuf_r (_REENT, c, fp);
|
|
}
|