Commit | Line | Data |
---|---|---|
f8370579 MD |
1 | #ifndef _BABELTRACE_FORMAT_CTF_MEMSTREAM_H |
2 | #define _BABELTRACE_FORMAT_CTF_MEMSTREAM_H | |
3 | ||
4 | /* | |
5 | * format/ctf/memstream.h | |
6 | * | |
7 | * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | * | |
9 | * memstream compatibility layer. | |
10 | * | |
eb31c5e6 MD |
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: | |
f8370579 | 17 | * |
eb31c5e6 MD |
18 | * The above copyright notice and this permission notice shall be included in |
19 | * all copies or substantial portions of the Software. | |
c462e188 MD |
20 | * |
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 | |
27 | * SOFTWARE. | |
f8370579 MD |
28 | */ |
29 | ||
f8370579 MD |
30 | #ifdef BABELTRACE_HAVE_FMEMOPEN |
31 | #include <stdio.h> | |
32 | ||
33 | static inline | |
0cbbc8b8 | 34 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) |
f8370579 MD |
35 | { |
36 | return fmemopen(buf, size, mode); | |
37 | } | |
38 | ||
39 | #else /* BABELTRACE_HAVE_FMEMOPEN */ | |
40 | ||
b8d6e1fc | 41 | #include <unistd.h> |
f8370579 MD |
42 | #include <stdlib.h> |
43 | #include <stdio.h> | |
b776eaa4 MJ |
44 | #include <string.h> |
45 | #include <errno.h> | |
46 | #include <babeltrace/endian-internal.h> | |
47 | ||
48 | #ifdef __MINGW32__ | |
49 | ||
50 | #include <io.h> | |
51 | #include <glib.h> | |
f8370579 MD |
52 | |
53 | /* | |
54 | * Fallback for systems which don't have fmemopen. Copy buffer to a | |
55 | * temporary file, and use that file as FILE * input. | |
56 | */ | |
57 | static inline | |
0cbbc8b8 | 58 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) |
f8370579 | 59 | { |
b776eaa4 | 60 | char *tmpname; |
f8370579 MD |
61 | size_t len; |
62 | FILE *fp; | |
63 | int ret; | |
64 | ||
65 | /* | |
66 | * Support reading only. | |
67 | */ | |
68 | if (strcmp(mode, "rb") != 0) { | |
69 | return NULL; | |
70 | } | |
b776eaa4 MJ |
71 | |
72 | /* Build a temporary filename */ | |
73 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
74 | if (_mktemp(tmpname) == NULL) { | |
75 | goto error_free; | |
76 | } | |
77 | ||
78 | /* | |
79 | * Open as a read/write binary temporary deleted on close file. | |
80 | * Will be deleted when the last file pointer is closed. | |
81 | */ | |
82 | fp = fopen(tmpname, "w+bTD"); | |
83 | if (!fp) { | |
84 | goto error_free; | |
85 | } | |
86 | ||
87 | /* Copy the entire buffer to the file */ | |
88 | len = fwrite(buf, sizeof(char), size, fp); | |
89 | if (len != size) { | |
90 | goto error_close; | |
91 | } | |
92 | ||
93 | /* Set the file pointer to the start of file */ | |
94 | ret = fseek(fp, 0L, SEEK_SET); | |
95 | if (ret < 0) { | |
96 | perror("fseek"); | |
97 | goto error_close; | |
98 | } | |
99 | ||
100 | g_free(tmpname); | |
101 | return fp; | |
102 | ||
103 | error_close: | |
104 | ret = fclose(fp); | |
105 | if (ret < 0) { | |
106 | perror("close"); | |
107 | } | |
108 | error_free: | |
109 | g_free(tmpname); | |
110 | return NULL; | |
111 | } | |
112 | ||
113 | #else /* __MINGW32__ */ | |
114 | ||
115 | /* | |
116 | * Fallback for systems which don't have fmemopen. Copy buffer to a | |
117 | * temporary file, and use that file as FILE * input. | |
118 | */ | |
119 | static inline | |
120 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) | |
121 | { | |
122 | char *tmpname; | |
123 | size_t len; | |
124 | FILE *fp; | |
125 | int ret; | |
126 | ||
127 | /* | |
128 | * Support reading only. | |
129 | */ | |
130 | if (strcmp(mode, "rb") != 0) { | |
131 | return NULL; | |
132 | } | |
133 | ||
134 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
f8370579 MD |
135 | ret = mkstemp(tmpname); |
136 | if (ret < 0) { | |
b776eaa4 | 137 | g_free(tmpname); |
f8370579 MD |
138 | return NULL; |
139 | } | |
140 | /* | |
141 | * We need to write to the file. | |
142 | */ | |
143 | fp = fdopen(ret, "w+"); | |
144 | if (!fp) { | |
145 | goto error_unlink; | |
146 | } | |
147 | /* Copy the entire buffer to the file */ | |
148 | len = fwrite(buf, sizeof(char), size, fp); | |
149 | if (len != size) { | |
150 | goto error_close; | |
151 | } | |
152 | ret = fseek(fp, 0L, SEEK_SET); | |
153 | if (ret < 0) { | |
154 | perror("fseek"); | |
155 | goto error_close; | |
156 | } | |
157 | /* We keep the handle open, but can unlink the file on the VFS. */ | |
158 | ret = unlink(tmpname); | |
159 | if (ret < 0) { | |
160 | perror("unlink"); | |
161 | } | |
b776eaa4 | 162 | g_free(tmpname); |
f8370579 MD |
163 | return fp; |
164 | ||
165 | error_close: | |
166 | ret = fclose(fp); | |
167 | if (ret < 0) { | |
168 | perror("close"); | |
169 | } | |
170 | error_unlink: | |
171 | ret = unlink(tmpname); | |
172 | if (ret < 0) { | |
173 | perror("unlink"); | |
174 | } | |
b776eaa4 | 175 | g_free(tmpname); |
f8370579 MD |
176 | return NULL; |
177 | } | |
178 | ||
b776eaa4 MJ |
179 | #endif /* __MINGW32__ */ |
180 | ||
f8370579 MD |
181 | #endif /* BABELTRACE_HAVE_FMEMOPEN */ |
182 | ||
b776eaa4 | 183 | |
f8370579 MD |
184 | #ifdef BABELTRACE_HAVE_OPEN_MEMSTREAM |
185 | ||
186 | #include <stdio.h> | |
187 | ||
188 | static inline | |
0cbbc8b8 | 189 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) |
f8370579 MD |
190 | { |
191 | return open_memstream(ptr, sizeloc); | |
192 | } | |
193 | ||
194 | static inline | |
0cbbc8b8 | 195 | int bt_close_memstream(char **buf, size_t *size, FILE *fp) |
f8370579 MD |
196 | { |
197 | return fclose(fp); | |
198 | } | |
199 | ||
200 | #else /* BABELTRACE_HAVE_OPEN_MEMSTREAM */ | |
201 | ||
202 | #include <stdlib.h> | |
203 | #include <stdio.h> | |
b776eaa4 MJ |
204 | #include <glib.h> |
205 | ||
206 | #ifdef __MINGW32__ | |
207 | ||
208 | /* | |
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). | |
213 | */ | |
214 | static inline | |
215 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) | |
216 | { | |
217 | char *tmpname; | |
218 | FILE *fp; | |
219 | ||
220 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
221 | ||
222 | if (_mktemp(tmpname) == NULL) { | |
223 | goto error_free; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Open as a read/write binary temporary deleted on close file. | |
228 | * Will be deleted when the last file pointer is closed. | |
229 | */ | |
230 | fp = fopen(tmpname, "w+bTD"); | |
231 | if (!fp) { | |
232 | goto error_free; | |
233 | } | |
234 | ||
235 | g_free(tmpname); | |
236 | return fp; | |
237 | ||
238 | error_free: | |
239 | g_free(tmpname); | |
240 | return NULL; | |
241 | } | |
242 | ||
243 | #else /* __MINGW32__ */ | |
f8370579 MD |
244 | |
245 | /* | |
246 | * Fallback for systems which don't have open_memstream. Create FILE * | |
0cbbc8b8 MJ |
247 | * with bt_open_memstream, but require call to |
248 | * bt_close_memstream to flush all data written to the FILE * | |
f8370579 MD |
249 | * into the buffer (which we allocate). |
250 | */ | |
251 | static inline | |
0cbbc8b8 | 252 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) |
f8370579 | 253 | { |
b776eaa4 | 254 | char *tmpname; |
f8370579 MD |
255 | int ret; |
256 | FILE *fp; | |
257 | ||
b776eaa4 MJ |
258 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); |
259 | ||
f8370579 MD |
260 | ret = mkstemp(tmpname); |
261 | if (ret < 0) { | |
b776eaa4 MJ |
262 | perror("mkstemp"); |
263 | g_free(tmpname); | |
f8370579 MD |
264 | return NULL; |
265 | } | |
266 | fp = fdopen(ret, "w+"); | |
267 | if (!fp) { | |
268 | goto error_unlink; | |
269 | } | |
270 | /* | |
271 | * babeltrace_flush_memstream will update the buffer content | |
272 | * with read from fp. No need to keep the file around, just the | |
273 | * handle. | |
274 | */ | |
275 | ret = unlink(tmpname); | |
276 | if (ret < 0) { | |
277 | perror("unlink"); | |
278 | } | |
b776eaa4 | 279 | g_free(tmpname); |
f8370579 MD |
280 | return fp; |
281 | ||
282 | error_unlink: | |
283 | ret = unlink(tmpname); | |
284 | if (ret < 0) { | |
285 | perror("unlink"); | |
286 | } | |
b776eaa4 | 287 | g_free(tmpname); |
f8370579 MD |
288 | return NULL; |
289 | } | |
290 | ||
b776eaa4 MJ |
291 | #endif /* __MINGW32__ */ |
292 | ||
f8370579 MD |
293 | /* Get file size, allocate buffer, copy. */ |
294 | static inline | |
0cbbc8b8 | 295 | int bt_close_memstream(char **buf, size_t *size, FILE *fp) |
f8370579 MD |
296 | { |
297 | size_t len, n; | |
298 | long pos; | |
299 | int ret; | |
300 | ||
301 | ret = fflush(fp); | |
302 | if (ret < 0) { | |
303 | perror("fflush"); | |
304 | return ret; | |
305 | } | |
306 | ret = fseek(fp, 0L, SEEK_END); | |
307 | if (ret < 0) { | |
308 | perror("fseek"); | |
309 | return ret; | |
310 | } | |
311 | pos = ftell(fp); | |
312 | if (ret < 0) { | |
313 | perror("ftell"); | |
314 | return ret; | |
315 | } | |
316 | *size = pos; | |
317 | /* add final \0 */ | |
318 | *buf = calloc(pos + 1, sizeof(char)); | |
319 | if (!*buf) { | |
320 | return -ENOMEM; | |
321 | } | |
322 | ret = fseek(fp, 0L, SEEK_SET); | |
323 | if (ret < 0) { | |
324 | perror("fseek"); | |
325 | goto error_free; | |
326 | } | |
327 | /* Copy the entire file into the buffer */ | |
328 | n = 0; | |
329 | clearerr(fp); | |
330 | while (!feof(fp) && !ferror(fp) && (*size - n > 0)) { | |
331 | len = fread(*buf, sizeof(char), *size - n, fp); | |
332 | n += len; | |
333 | } | |
334 | if (n != *size) { | |
335 | ret = -1; | |
336 | goto error_close; | |
337 | } | |
338 | ret = fclose(fp); | |
339 | if (ret < 0) { | |
340 | perror("fclose"); | |
341 | return ret; | |
342 | } | |
343 | return 0; | |
344 | ||
345 | error_close: | |
346 | ret = fclose(fp); | |
347 | if (ret < 0) { | |
348 | perror("fclose"); | |
349 | } | |
350 | error_free: | |
351 | free(*buf); | |
352 | *buf = NULL; | |
353 | return ret; | |
354 | } | |
355 | ||
356 | #endif /* BABELTRACE_HAVE_OPEN_MEMSTREAM */ | |
357 | ||
358 | #endif /* _BABELTRACE_FORMAT_CTF_MEMSTREAM_H */ |