| 1 | /* Functions to access FILE structure internals. |
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| 2 | Copyright (C) 2000, 2001 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | /* This header contains the same definitions as the header of the same name |
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| 21 | on Sun's Solaris OS. */ |
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| 22 | |
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| 23 | #ifndef _STDIO_EXT_H |
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| 24 | #define _STDIO_EXT_H 1 |
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| 25 | |
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| 26 | #include <stdio.h> |
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| 27 | |
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| 28 | enum |
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| 29 | { |
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| 30 | /* Query current state of the locking status. */ |
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| 31 | FSETLOCKING_QUERY = 0, |
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| 32 | #define FSETLOCKING_QUERY FSETLOCKING_QUERY |
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| 33 | /* The library protects all uses of the stream functions, except for |
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| 34 | uses of the *_unlocked functions, by calls equivalent to flockfile(). */ |
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| 35 | FSETLOCKING_INTERNAL, |
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| 36 | #define FSETLOCKING_INTERNAL FSETLOCKING_INTERNAL |
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| 37 | /* The user will take care of locking. */ |
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| 38 | FSETLOCKING_BYCALLER |
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| 39 | #define FSETLOCKING_BYCALLER FSETLOCKING_BYCALLER |
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| 40 | }; |
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| 41 | |
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| 42 | |
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| 43 | __BEGIN_DECLS |
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| 44 | |
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| 45 | /* Return the size of the buffer of FP in bytes currently in use by |
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| 46 | the given stream. */ |
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| 47 | extern size_t __fbufsize (FILE *__fp); |
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| 48 | |
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| 49 | |
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| 50 | /* Return non-zero value iff the stream FP is opened readonly, or if the |
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| 51 | last operation on the stream was a read operation. */ |
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| 52 | extern int __freading (FILE *__fp); |
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| 53 | |
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| 54 | /* Return non-zero value iff the stream FP is opened write-only or |
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| 55 | append-only, or if the last operation on the stream was a write |
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| 56 | operation. */ |
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| 57 | extern int __fwriting (FILE *__fp); |
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| 58 | |
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| 59 | |
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| 60 | /* Return non-zero value iff stream FP is not opened write-only or |
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| 61 | append-only. */ |
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| 62 | extern int __freadable (FILE *__fp); |
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| 63 | |
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| 64 | /* Return non-zero value iff stream FP is not opened read-only. */ |
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| 65 | extern int __fwritable (FILE *__fp); |
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| 66 | |
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| 67 | |
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| 68 | /* Return non-zero value iff the stream FP is line-buffered. */ |
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| 69 | extern int __flbf (FILE *__fp); |
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| 70 | |
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| 71 | |
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| 72 | /* Discard all pending buffered I/O on the stream FP. */ |
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| 73 | extern void __fpurge (FILE *__fp); |
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| 74 | |
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| 75 | /* Return amount of output in bytes pending on a stream FP. */ |
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| 76 | extern size_t __fpending (FILE *__fp); |
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| 77 | |
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| 78 | /* Flush all line-buffered files. */ |
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| 79 | extern void _flushlbf (void); |
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| 80 | |
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| 81 | |
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| 82 | /* Set locking status of stream FP to TYPE. */ |
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| 83 | extern int __fsetlocking (FILE *__fp, int __type); |
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| 84 | |
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| 85 | __END_DECLS |
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| 86 | |
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| 87 | #endif /* stdio_ext.h */ |
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