Rev 4874 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* No user fns here. Pesch 15apr92. */ |
| 2 | |||
| 3 | /* |
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| 4 | * Copyright (c) 1990, 2007 The Regents of the University of California. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms are permitted |
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| 8 | * provided that the above copyright notice and this paragraph are |
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| 9 | * duplicated in all such forms and that any documentation, |
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| 10 | * advertising materials, and other materials related to such |
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| 11 | * distribution and use acknowledge that the software was developed |
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| 12 | * by the University of California, Berkeley. The name of the |
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| 13 | * University may not be used to endorse or promote products derived |
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| 14 | * from this software without specific prior written permission. |
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 18 | */ |
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| 19 | |||
| 20 | #include <_ansi.h> |
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| 21 | #include |
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| 22 | #include |
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| 23 | #include |
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| 24 | #include "local.h" |
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| 25 | |||
| 26 | /* |
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| 27 | * Various output routines call wsetup to be sure it is safe to write, |
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| 28 | * because either _flags does not include __SWR, or _buf is NULL. |
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| 29 | * _wsetup returns 0 if OK to write, nonzero and set errno otherwise. |
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| 30 | */ |
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| 31 | |||
| 32 | int |
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| 33 | _DEFUN(__swsetup_r, (ptr, fp), |
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| 34 | struct _reent *ptr _AND |
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| 35 | register FILE * fp) |
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| 36 | { |
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| 37 | /* Make sure stdio is set up. */ |
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| 38 | |||
| 39 | CHECK_INIT (_REENT, fp); |
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| 40 | |||
| 41 | /* |
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| 42 | * If we are not writing, we had better be reading and writing. |
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| 43 | */ |
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| 44 | |||
| 45 | if ((fp->_flags & __SWR) == 0) |
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| 46 | { |
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| 47 | if ((fp->_flags & __SRW) == 0) |
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| 48 | { |
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| 49 | ptr->_errno = EBADF; |
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| 50 | fp->_flags |= __SERR; |
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| 6099 | serge | 51 | return EOF; |
| 4349 | Serge | 52 | } |
| 53 | if (fp->_flags & __SRD) |
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| 54 | { |
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| 55 | /* clobber any ungetc data */ |
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| 56 | if (HASUB (fp)) |
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| 57 | FREEUB (ptr, fp); |
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| 58 | fp->_flags &= ~(__SRD | __SEOF); |
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| 59 | fp->_r = 0; |
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| 60 | fp->_p = fp->_bf._base; |
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| 61 | } |
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| 62 | fp->_flags |= __SWR; |
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| 63 | } |
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| 64 | |||
| 65 | /* |
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| 66 | * Make a buffer if necessary, then set _w. |
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| 67 | * A string I/O file should not explicitly allocate a buffer |
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| 68 | * unless asprintf is being used. |
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| 69 | */ |
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| 6099 | serge | 70 | if (fp->_bf._base == NULL |
| 4349 | Serge | 71 | && (!(fp->_flags & __SSTR) || (fp->_flags & __SMBF))) |
| 72 | __smakebuf_r (ptr, fp); |
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| 73 | |||
| 74 | if (fp->_flags & __SLBF) |
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| 75 | { |
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| 76 | /* |
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| 77 | * It is line buffered, so make _lbfsize be -_bufsize |
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| 78 | * for the putc() macro. We will change _lbfsize back |
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| 79 | * to 0 whenever we turn off __SWR. |
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| 80 | */ |
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| 81 | fp->_w = 0; |
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| 82 | fp->_lbfsize = -fp->_bf._size; |
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| 83 | } |
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| 84 | else |
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| 85 | fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size; |
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| 86 | |||
| 87 | if (!fp->_bf._base && (fp->_flags & __SMBF)) |
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| 88 | { |
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| 89 | /* __smakebuf_r set errno, but not flag */ |
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| 90 | fp->_flags |= __SERR; |
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| 91 | return EOF; |
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| 92 | } |
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| 93 | return 0; |
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| 94 | } |