1/* Copyright (C) 1993-2018 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 <http://www.gnu.org/licenses/>.
17
18 As a special exception, if you link the code in this file with
19 files compiled with a GNU compiler to produce an executable,
20 that does not cause the resulting executable to be covered by
21 the GNU Lesser General Public License. This exception does not
22 however invalidate any other reasons why the executable file
23 might be covered by the GNU Lesser General Public License.
24 This exception applies to code released by its copyright holders
25 in files containing the exception. */
26
27#include <stdio.h>
28
29typedef void *(*_IO_alloc_type) (_IO_size_t);
30typedef void (*_IO_free_type) (void*);
31
32struct _IO_str_fields
33{
34 _IO_alloc_type _allocate_buffer;
35 _IO_free_type _free_buffer;
36};
37
38/* This is needed for the Irix6 N32 ABI, which has a 64 bit off_t type,
39 but a 32 bit pointer type. In this case, we get 4 bytes of padding
40 after the vtable pointer. Putting them in a structure together solves
41 this problem. */
42
43struct _IO_streambuf
44{
45 struct _IO_FILE _f;
46 const struct _IO_jump_t *vtable;
47};
48
49typedef struct _IO_strfile_
50{
51 struct _IO_streambuf _sbf;
52 struct _IO_str_fields _s;
53} _IO_strfile;
54
55/* dynamic: set when the array object is allocated (or reallocated) as
56 necessary to hold a character sequence that can change in length. */
57#define _IO_STR_DYNAMIC(FP) ((FP)->_s._allocate_buffer != (_IO_alloc_type)0)
58
59/* frozen: set when the program has requested that the array object not
60 be altered, reallocated, or freed. */
61#define _IO_STR_FROZEN(FP) ((FP)->_f._IO_file_flags & _IO_USER_BUF)
62
63typedef struct
64{
65 _IO_strfile f;
66 /* This is used for the characters which do not fit in the buffer
67 provided by the user. */
68 char overflow_buf[64];
69} _IO_strnfile;
70
71extern const struct _IO_jump_t _IO_strn_jumps attribute_hidden;
72
73
74typedef struct
75{
76 _IO_strfile f;
77 /* This is used for the characters which do not fit in the buffer
78 provided by the user. */
79 wchar_t overflow_buf[64];
80} _IO_wstrnfile;
81
82extern const struct _IO_jump_t _IO_wstrn_jumps attribute_hidden;
83