1/* Copyright (C) 1991-2020 Free Software Foundation, Inc. 
2 This file is part of the GNU C Library. 
3 
4 The GNU C Library is free software; you can redistribute it and/or 
5 modify it under the terms of the GNU Lesser General Public 
6 License as published by the Free Software Foundation; either 
7 version 2.1 of the License, or (at your option) any later version. 
8 
9 The GNU C Library is distributed in the hope that it will be useful, 
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
12 Lesser General Public License for more details. 
13 
14 You should have received a copy of the GNU Lesser General Public 
15 License along with the GNU C Library; if not, see 
16 <https://www.gnu.org/licenses/>. */ 
17 
18#ifndef __struct_FILE_defined 
19#define __struct_FILE_defined 1 
20 
21/* Caution: The contents of this file are not part of the official 
22 stdio.h API. However, much of it is part of the official *binary* 
23 interface, and therefore cannot be changed. */ 
24 
25#if defined _IO_USE_OLD_IO_FILE && !defined _LIBC 
26# error "_IO_USE_OLD_IO_FILE should only be defined when building libc itself" 
27#endif 
28 
29#if defined _IO_lock_t_defined && !defined _LIBC 
30# error "_IO_lock_t_defined should only be defined when building libc itself" 
31#endif 
32 
33#include <bits/types.h> 
34 
35struct _IO_FILE; 
36struct _IO_marker; 
37struct _IO_codecvt; 
38struct _IO_wide_data; 
39 
40/* During the build of glibc itself, _IO_lock_t will already have been 
41 defined by internal headers. */ 
42#ifndef _IO_lock_t_defined 
43typedef void _IO_lock_t; 
44#endif 
45 
46/* The tag name of this struct is _IO_FILE to preserve historic 
47 C++ mangled names for functions taking FILE* arguments. 
48 That name should not be used in new code. */ 
49struct _IO_FILE 
50{ 
51 int _flags; /* High-order word is _IO_MAGIC; rest is flags. */ 
52 
53 /* The following pointers correspond to the C++ streambuf protocol. */ 
54 char *_IO_read_ptr; /* Current read pointer */ 
55 char *_IO_read_end; /* End of get area. */ 
56 char *_IO_read_base; /* Start of putback+get area. */ 
57 char *_IO_write_base; /* Start of put area. */ 
58 char *_IO_write_ptr; /* Current put pointer. */ 
59 char *_IO_write_end; /* End of put area. */ 
60 char *_IO_buf_base; /* Start of reserve area. */ 
61 char *_IO_buf_end; /* End of reserve area. */ 
62 
63 /* The following fields are used to support backing up and undo. */ 
64 char *_IO_save_base; /* Pointer to start of non-current get area. */ 
65 char *_IO_backup_base; /* Pointer to first valid character of backup area */ 
66 char *_IO_save_end; /* Pointer to end of non-current get area. */ 
67 
68 struct _IO_marker *_markers; 
69 
70 struct _IO_FILE *_chain; 
71 
72 int _fileno; 
73 int _flags2; 
74 __off_t _old_offset; /* This used to be _offset but it's too small. */ 
75 
76 /* 1+column number of pbase(); 0 is unknown. */ 
77 unsigned short _cur_column; 
78 signed char _vtable_offset; 
79 char _shortbuf[1]; 
80 
81 _IO_lock_t *_lock; 
82#ifdef _IO_USE_OLD_IO_FILE 
83}; 
84 
85struct _IO_FILE_complete 
86{ 
87 struct _IO_FILE _file; 
88#endif 
89 __off64_t _offset; 
90 /* Wide character stream stuff. */ 
91 struct _IO_codecvt *_codecvt; 
92 struct _IO_wide_data *_wide_data; 
93 struct _IO_FILE *_freeres_list; 
94 void *_freeres_buf; 
95 size_t __pad5; 
96 int _mode; 
97 /* Make sure we don't get into trouble again. */ 
98 char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)]; 
99}; 
100 
101/* These macros are used by bits/stdio.h and internal headers. */ 
102#define __getc_unlocked_body(_fp) \ 
103 (__glibc_unlikely ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end) \ 
104 ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++) 
105 
106#define __putc_unlocked_body(_ch, _fp) \ 
107 (__glibc_unlikely ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end) \ 
108 ? __overflow (_fp, (unsigned char) (_ch)) \ 
109 : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch))) 
110 
111#define _IO_EOF_SEEN 0x0010 
112#define __feof_unlocked_body(_fp) (((_fp)->_flags & _IO_EOF_SEEN) != 0) 
113 
114#define _IO_ERR_SEEN 0x0020 
115#define __ferror_unlocked_body(_fp) (((_fp)->_flags & _IO_ERR_SEEN) != 0) 
116 
117#define _IO_USER_LOCK 0x8000 
118/* Many more flag bits are defined internally. */ 
119 
120#endif 
121