1 /* Functions to access FILE structure internals. 2 Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 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
