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