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stdio_ext.h
01: /* Functions to access FILE structure internals.
02:    Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
03:    This file is part of the GNU C Library.
04: 
05:    The GNU C Library is free software; you can redistribute it and/or
06:    modify it under the terms of the GNU Lesser General Public
07:    License as published by the Free Software Foundation; either
08:    version 2.1 of the License, or (at your option) any later version.
09: 
10:    The GNU C Library is distributed in the hope that it will be useful,
11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13:    Lesser General Public License for more details.
14: 
15:    You should have received a copy of the GNU Lesser General Public
16:    License along with the GNU C Library; if not, write to the Free
17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18:    02111-1307 USA.  */
19: 
20: /* This header contains the same definitions as the header of the same name
21:    on Sun's Solaris OS.  */
22: 
23: #ifndef _STDIO_EXT_H
24: #define _STDIO_EXT_H    1
25: 
26: #include <stdio.h>
27: 
28: enum
29: {
30:   /* Query current state of the locking status.  */
31:   FSETLOCKING_QUERY = 0,
32: #define FSETLOCKING_QUERY       FSETLOCKING_QUERY
33:   /* The library protects all uses of the stream functions, except for
34:      uses of the *_unlocked functions, by calls equivalent to flockfile().  */
35:   FSETLOCKING_INTERNAL,
36: #define FSETLOCKING_INTERNAL    FSETLOCKING_INTERNAL
37:   /* The user will take care of locking.  */
38:   FSETLOCKING_BYCALLER
39: #define FSETLOCKING_BYCALLER    FSETLOCKING_BYCALLER
40: };
41: 
42: 
43: __BEGIN_DECLS
44: 
45: /* Return the size of the buffer of FP in bytes currently in use by
46:    the given stream.  */
47: extern size_t __fbufsize (FILE *__fp) __THROW;
48: 
49: 
50: /* Return non-zero value iff the stream FP is opened readonly, or if the
51:    last operation on the stream was a read operation.  */
52: extern int __freading (FILE *__fp) __THROW;
53: 
54: /* Return non-zero value iff the stream FP is opened write-only or
55:    append-only, or if the last operation on the stream was a write
56:    operation.  */
57: extern int __fwriting (FILE *__fp) __THROW;
58: 
59: 
60: /* Return non-zero value iff stream FP is not opened write-only or
61:    append-only.  */
62: extern int __freadable (FILE *__fp) __THROW;
63: 
64: /* Return non-zero value iff stream FP is not opened read-only.  */
65: extern int __fwritable (FILE *__fp) __THROW;
66: 
67: 
68: /* Return non-zero value iff the stream FP is line-buffered.  */
69: extern int __flbf (FILE *__fp) __THROW;
70: 
71: 
72: /* Discard all pending buffered I/O on the stream FP.  */
73: extern void __fpurge (FILE *__fp) __THROW;
74: 
75: /* Return amount of output in bytes pending on a stream FP.  */
76: extern size_t __fpending (FILE *__fp) __THROW;
77: 
78: /* Flush all line-buffered files.  */
79: extern void _flushlbf (void);
80: 
81: 
82: /* Set locking status of stream FP to TYPE.  */
83: extern int __fsetlocking (FILE *__fp, int __type) __THROW;
84: 
85: __END_DECLS
86: 
87: #endif  /* stdio_ext.h */
88: 


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© Andrew Scott 2006 - 2024,
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http://www.andrew-scott.uk/
Andrew Scott
http://www.andrew-scott.co.uk/