Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1693 | serge | 1 | /* No user fns here. Pesch 15apr92. */ |
| 2 | |||
| 3 | /* |
||
| 4 | * Copyright (c) 1990, 2007 The Regents of the University of California. |
||
| 5 | * All rights reserved. |
||
| 6 | * |
||
| 7 | * Redistribution and use in source and binary forms are permitted |
||
| 8 | * provided that the above copyright notice and this paragraph are |
||
| 9 | * duplicated in all such forms and that any documentation, |
||
| 10 | * advertising materials, and other materials related to such |
||
| 11 | * distribution and use acknowledge that the software was developed |
||
| 12 | * by the University of California, Berkeley. The name of the |
||
| 13 | * University may not be used to endorse or promote products derived |
||
| 14 | * from this software without specific prior written permission. |
||
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
||
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
||
| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
||
| 18 | */ |
||
| 19 | |||
| 20 | #include <_ansi.h> |
||
| 21 | #include |
||
| 22 | #include |
||
| 23 | #include "local.h" |
||
| 24 | |||
| 25 | /* |
||
| 26 | * Various output routines call wsetup to be sure it is safe to write, |
||
| 27 | * because either _flags does not include __SWR, or _buf is NULL. |
||
| 28 | * _wsetup returns 0 if OK to write, nonzero otherwise. |
||
| 29 | */ |
||
| 30 | |||
| 31 | int |
||
| 32 | _DEFUN(__swsetup_r, (ptr, fp), |
||
| 33 | struct _reent *ptr _AND |
||
| 34 | register FILE * fp) |
||
| 35 | { |
||
| 36 | /* Make sure stdio is set up. */ |
||
| 37 | |||
| 38 | CHECK_INIT (_REENT, fp); |
||
| 39 | |||
| 40 | /* |
||
| 41 | * If we are not writing, we had better be reading and writing. |
||
| 42 | */ |
||
| 43 | |||
| 44 | if ((fp->_flags & __SWR) == 0) |
||
| 45 | { |
||
| 46 | if ((fp->_flags & __SRW) == 0) |
||
| 47 | return EOF; |
||
| 48 | if (fp->_flags & __SRD) |
||
| 49 | { |
||
| 50 | /* clobber any ungetc data */ |
||
| 51 | if (HASUB (fp)) |
||
| 52 | FREEUB (ptr, fp); |
||
| 53 | fp->_flags &= ~(__SRD | __SEOF); |
||
| 54 | fp->_r = 0; |
||
| 55 | fp->_p = fp->_bf._base; |
||
| 56 | } |
||
| 57 | fp->_flags |= __SWR; |
||
| 58 | } |
||
| 59 | |||
| 60 | /* |
||
| 61 | * Make a buffer if necessary, then set _w. |
||
| 62 | * A string I/O file should not explicitly allocate a buffer |
||
| 63 | * unless asprintf is being used. |
||
| 64 | */ |
||
| 65 | if (fp->_bf._base == NULL |
||
| 66 | && (!(fp->_flags & __SSTR) || (fp->_flags & __SMBF))) |
||
| 67 | __smakebuf_r (ptr, fp); |
||
| 68 | |||
| 69 | if (fp->_flags & __SLBF) |
||
| 70 | { |
||
| 71 | /* |
||
| 72 | * It is line buffered, so make _lbfsize be -_bufsize |
||
| 73 | * for the putc() macro. We will change _lbfsize back |
||
| 74 | * to 0 whenever we turn off __SWR. |
||
| 75 | */ |
||
| 76 | fp->_w = 0; |
||
| 77 | fp->_lbfsize = -fp->_bf._size; |
||
| 78 | } |
||
| 79 | else |
||
| 80 | fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size; |
||
| 81 | |||
| 82 | return (!fp->_bf._base && (fp->_flags & __SMBF)) ? EOF : 0; |
||
| 83 | } |