1 #ifndef _BABELTRACE_FORMAT_CTF_MEMSTREAM_H
2 #define _BABELTRACE_FORMAT_CTF_MEMSTREAM_H
5 * format/ctf/memstream.h
7 * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * memstream compatibility layer.
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #ifdef BABELTRACE_HAVE_FMEMOPEN
34 FILE *bt_fmemopen(void *buf
, size_t size
, const char *mode
)
36 return fmemopen(buf
, size
, mode
);
39 #else /* BABELTRACE_HAVE_FMEMOPEN */
46 #include <babeltrace/endian-internal.h>
54 * Fallback for systems which don't have fmemopen. Copy buffer to a
55 * temporary file, and use that file as FILE * input.
58 FILE *bt_fmemopen(void *buf
, size_t size
, const char *mode
)
66 * Support reading only.
68 if (strcmp(mode
, "rb") != 0) {
72 /* Build a temporary filename */
73 tmpname
= g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL
);
74 if (_mktemp(tmpname
) == NULL
) {
79 * Open as a read/write binary temporary deleted on close file.
80 * Will be deleted when the last file pointer is closed.
82 fp
= fopen(tmpname
, "w+bTD");
87 /* Copy the entire buffer to the file */
88 len
= fwrite(buf
, sizeof(char), size
, fp
);
93 /* Set the file pointer to the start of file */
94 ret
= fseek(fp
, 0L, SEEK_SET
);
113 #else /* __MINGW32__ */
116 * Fallback for systems which don't have fmemopen. Copy buffer to a
117 * temporary file, and use that file as FILE * input.
120 FILE *bt_fmemopen(void *buf
, size_t size
, const char *mode
)
128 * Support reading only.
130 if (strcmp(mode
, "rb") != 0) {
134 tmpname
= g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL
);
135 ret
= mkstemp(tmpname
);
141 * We need to write to the file.
143 fp
= fdopen(ret
, "wb+");
147 /* Copy the entire buffer to the file */
148 len
= fwrite(buf
, sizeof(char), size
, fp
);
152 ret
= fseek(fp
, 0L, SEEK_SET
);
157 /* We keep the handle open, but can unlink the file on the VFS. */
158 ret
= unlink(tmpname
);
171 ret
= unlink(tmpname
);
179 #endif /* __MINGW32__ */
181 #endif /* BABELTRACE_HAVE_FMEMOPEN */
184 #ifdef BABELTRACE_HAVE_OPEN_MEMSTREAM
189 FILE *bt_open_memstream(char **ptr
, size_t *sizeloc
)
191 return open_memstream(ptr
, sizeloc
);
195 int bt_close_memstream(char **buf
, size_t *size
, FILE *fp
)
200 #else /* BABELTRACE_HAVE_OPEN_MEMSTREAM */
209 * Fallback for systems which don't have open_memstream. Create FILE *
210 * with bt_open_memstream, but require call to
211 * bt_close_memstream to flush all data written to the FILE *
212 * into the buffer (which we allocate).
215 FILE *bt_open_memstream(char **ptr
, size_t *sizeloc
)
220 tmpname
= g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL
);
222 if (_mktemp(tmpname
) == NULL
) {
227 * Open as a read/write binary temporary deleted on close file.
228 * Will be deleted when the last file pointer is closed.
230 fp
= fopen(tmpname
, "w+bTD");
243 #else /* __MINGW32__ */
246 * Fallback for systems which don't have open_memstream. Create FILE *
247 * with bt_open_memstream, but require call to
248 * bt_close_memstream to flush all data written to the FILE *
249 * into the buffer (which we allocate).
252 FILE *bt_open_memstream(char **ptr
, size_t *sizeloc
)
258 tmpname
= g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL
);
260 ret
= mkstemp(tmpname
);
266 fp
= fdopen(ret
, "wb+");
271 * babeltrace_flush_memstream will update the buffer content
272 * with read from fp. No need to keep the file around, just the
275 ret
= unlink(tmpname
);
283 ret
= unlink(tmpname
);
291 #endif /* __MINGW32__ */
293 /* Get file size, allocate buffer, copy. */
295 int bt_close_memstream(char **buf
, size_t *size
, FILE *fp
)
306 ret
= fseek(fp
, 0L, SEEK_END
);
318 *buf
= calloc(pos
+ 1, sizeof(char));
322 ret
= fseek(fp
, 0L, SEEK_SET
);
327 /* Copy the entire file into the buffer */
330 while (!feof(fp
) && !ferror(fp
) && (*size
- n
> 0)) {
331 len
= fread(*buf
, sizeof(char), *size
- n
, fp
);
356 #endif /* BABELTRACE_HAVE_OPEN_MEMSTREAM */
358 #endif /* _BABELTRACE_FORMAT_CTF_MEMSTREAM_H */
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