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 *babeltrace_fmemopen(void *buf
, size_t size
, const char *mode
)
36 return fmemopen(buf
, size
, mode
);
39 #else /* BABELTRACE_HAVE_FMEMOPEN */
45 * Fallback for systems which don't have fmemopen. Copy buffer to a
46 * temporary file, and use that file as FILE * input.
49 FILE *babeltrace_fmemopen(void *buf
, size_t size
, const char *mode
)
51 char tmpname
[PATH_MAX
];
57 * Support reading only.
59 if (strcmp(mode
, "rb") != 0) {
62 strncpy(tmpname
, "/tmp/babeltrace-tmp-XXXXXX", PATH_MAX
);
63 ret
= mkstemp(tmpname
);
68 * We need to write to the file.
70 fp
= fdopen(ret
, "w+");
74 /* Copy the entire buffer to the file */
75 len
= fwrite(buf
, sizeof(char), size
, fp
);
79 ret
= fseek(fp
, 0L, SEEK_SET
);
84 /* We keep the handle open, but can unlink the file on the VFS. */
85 ret
= unlink(tmpname
);
97 ret
= unlink(tmpname
);
104 #endif /* BABELTRACE_HAVE_FMEMOPEN */
106 #ifdef BABELTRACE_HAVE_OPEN_MEMSTREAM
111 FILE *babeltrace_open_memstream(char **ptr
, size_t *sizeloc
)
113 return open_memstream(ptr
, sizeloc
);
117 int babeltrace_close_memstream(char **buf
, size_t *size
, FILE *fp
)
122 #else /* BABELTRACE_HAVE_OPEN_MEMSTREAM */
128 * Fallback for systems which don't have open_memstream. Create FILE *
129 * with babeltrace_open_memstream, but require call to
130 * babeltrace_close_memstream to flush all data written to the FILE *
131 * into the buffer (which we allocate).
134 FILE *babeltrace_open_memstream(char **ptr
, size_t *sizeloc
)
136 char tmpname
[PATH_MAX
];
140 strncpy(tmpname
, "/tmp/babeltrace-tmp-XXXXXX", PATH_MAX
);
141 ret
= mkstemp(tmpname
);
145 fp
= fdopen(ret
, "w+");
150 * babeltrace_flush_memstream will update the buffer content
151 * with read from fp. No need to keep the file around, just the
154 ret
= unlink(tmpname
);
161 ret
= unlink(tmpname
);
168 /* Get file size, allocate buffer, copy. */
170 int babeltrace_close_memstream(char **buf
, size_t *size
, FILE *fp
)
181 ret
= fseek(fp
, 0L, SEEK_END
);
193 *buf
= calloc(pos
+ 1, sizeof(char));
197 ret
= fseek(fp
, 0L, SEEK_SET
);
202 /* Copy the entire file into the buffer */
205 while (!feof(fp
) && !ferror(fp
) && (*size
- n
> 0)) {
206 len
= fread(*buf
, sizeof(char), *size
- n
, fp
);
231 #endif /* BABELTRACE_HAVE_OPEN_MEMSTREAM */
233 #endif /* _BABELTRACE_FORMAT_CTF_MEMSTREAM_H */
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