blob: 216dac39d346e7f3b46e7be8febf2048be017829 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
*
* GNU Library General Public License (LGPL) version 2 or later.
*
* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
*/
#include <features.h>
#ifdef __USE_GNU
#include "_stdio.h"
#ifndef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
#error no custom streams!
#endif
/* NOTE: GLIBC difference!!! -- fopencookie
* According to the info pages, glibc allows seeking within buffers even if
* no seek function is supplied. We don't. */
/* NOTE: GLIBC difference!!! -- fopencookie
* When compiled without large file support, the offset pointer for the
* cookie_seek function is off_t * and not off64_t * as for glibc. */
/* NOTE: GLIBC difference!!! -- fopencookie (bcc only)
* Since bcc doesn't support passing of structs, we define fopencookie as a
* macro in terms of _fopencookie which takes a struct * for the io functions
* instead.
*/
/* Currently no real reentrancy issues other than a possible double close(). */
#ifndef __BCC__
FILE *fopencookie(void * __restrict cookie, const char * __restrict mode,
cookie_io_functions_t io_functions)
#else
FILE *_fopencookie(void * __restrict cookie, const char * __restrict mode,
register cookie_io_functions_t *io_functions)
#endif
{
FILE *stream;
_IO_cookie_file_t *new_f;
new_f = malloc(sizeof(_IO_cookie_file_t));
if (new_f == NULL) {
return NULL;
}
new_f->__fp.__modeflags = __FLAG_FREEFILE;
#ifdef __STDIO_BUFFERS
new_f->__fp.__bufstart = NULL; /* We allocate a buffer below. */
#endif
#ifdef __UCLIBC_HAS_THREADS__
/* We only initialize the mutex in the non-freopen case. */
STDIO_INIT_MUTEX(new_f->__fp.__lock);
#endif
/* Fake an fdopen guaranteed to pass the _stdio_fopen basic agreement
* check without an fcntl call. */
stream = _stdio_fopen(((intptr_t)(INT_MAX-1)), mode, &new_f->__fp, INT_MAX);
if (stream) {
stream->__filedes = __STDIO_STREAM_GLIBC_CUSTOM_FILEDES;
#ifndef __BCC__
new_f->__gcs = io_functions;
#else
new_f->__gcs.read = io_functions->read;
new_f->__gcs.write = io_functions->write;
new_f->__gcs.seek = io_functions->seek;
new_f->__gcs.close = io_functions->close;
#endif
new_f->__cookie = cookie;
__STDIO_STREAM_VALIDATE(stream);
}
return stream;
}
#ifndef __BCC__
libc_hidden_def(fopencookie)
#endif
#endif
|
