| 0,0 → 1,83 |
|---|
| /* No user fns here. Pesch 15apr92. */ |
| |
| /* |
| * Copyright (c) 1990, 2007 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. |
| */ |
| |
| #include <_ansi.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "local.h" |
| |
| /* |
| * Various output routines call wsetup to be sure it is safe to write, |
| * because either _flags does not include __SWR, or _buf is NULL. |
| * _wsetup returns 0 if OK to write, nonzero otherwise. |
| */ |
| |
| int |
| _DEFUN(__swsetup_r, (ptr, fp), |
| struct _reent *ptr _AND |
| register FILE * fp) |
| { |
| /* Make sure stdio is set up. */ |
| |
| CHECK_INIT (_REENT, fp); |
| |
| /* |
| * If we are not writing, we had better be reading and writing. |
| */ |
| |
| if ((fp->_flags & __SWR) == 0) |
| { |
| if ((fp->_flags & __SRW) == 0) |
| return EOF; |
| if (fp->_flags & __SRD) |
| { |
| /* clobber any ungetc data */ |
| if (HASUB (fp)) |
| FREEUB (ptr, fp); |
| fp->_flags &= ~(__SRD | __SEOF); |
| fp->_r = 0; |
| fp->_p = fp->_bf._base; |
| } |
| fp->_flags |= __SWR; |
| } |
| |
| /* |
| * Make a buffer if necessary, then set _w. |
| * A string I/O file should not explicitly allocate a buffer |
| * unless asprintf is being used. |
| */ |
| if (fp->_bf._base == NULL |
| && (!(fp->_flags & __SSTR) || (fp->_flags & __SMBF))) |
| __smakebuf_r (ptr, fp); |
| |
| if (fp->_flags & __SLBF) |
| { |
| /* |
| * It is line buffered, so make _lbfsize be -_bufsize |
| * for the putc() macro. We will change _lbfsize back |
| * to 0 whenever we turn off __SWR. |
| */ |
| fp->_w = 0; |
| fp->_lbfsize = -fp->_bf._size; |
| } |
| else |
| fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size; |
| |
| return (!fp->_bf._base && (fp->_flags & __SMBF)) ? EOF : 0; |
| } |