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 | ||
41 | #include <stdlib.h> | |
42 | #include <stdio.h> | |
b776eaa4 MJ |
43 | #include <string.h> |
44 | #include <errno.h> | |
45 | #include <babeltrace/endian-internal.h> | |
46 | ||
47 | #ifdef __MINGW32__ | |
48 | ||
49 | #include <io.h> | |
50 | #include <glib.h> | |
f8370579 MD |
51 | |
52 | /* | |
53 | * Fallback for systems which don't have fmemopen. Copy buffer to a | |
54 | * temporary file, and use that file as FILE * input. | |
55 | */ | |
56 | static inline | |
0cbbc8b8 | 57 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) |
f8370579 | 58 | { |
b776eaa4 | 59 | char *tmpname; |
f8370579 MD |
60 | size_t len; |
61 | FILE *fp; | |
62 | int ret; | |
63 | ||
64 | /* | |
65 | * Support reading only. | |
66 | */ | |
67 | if (strcmp(mode, "rb") != 0) { | |
68 | return NULL; | |
69 | } | |
b776eaa4 MJ |
70 | |
71 | /* Build a temporary filename */ | |
72 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
73 | if (_mktemp(tmpname) == NULL) { | |
74 | goto error_free; | |
75 | } | |
76 | ||
77 | /* | |
78 | * Open as a read/write binary temporary deleted on close file. | |
79 | * Will be deleted when the last file pointer is closed. | |
80 | */ | |
81 | fp = fopen(tmpname, "w+bTD"); | |
82 | if (!fp) { | |
83 | goto error_free; | |
84 | } | |
85 | ||
86 | /* Copy the entire buffer to the file */ | |
87 | len = fwrite(buf, sizeof(char), size, fp); | |
88 | if (len != size) { | |
89 | goto error_close; | |
90 | } | |
91 | ||
92 | /* Set the file pointer to the start of file */ | |
93 | ret = fseek(fp, 0L, SEEK_SET); | |
94 | if (ret < 0) { | |
95 | perror("fseek"); | |
96 | goto error_close; | |
97 | } | |
98 | ||
99 | g_free(tmpname); | |
100 | return fp; | |
101 | ||
102 | error_close: | |
103 | ret = fclose(fp); | |
104 | if (ret < 0) { | |
105 | perror("close"); | |
106 | } | |
107 | error_free: | |
108 | g_free(tmpname); | |
109 | return NULL; | |
110 | } | |
111 | ||
112 | #else /* __MINGW32__ */ | |
113 | ||
114 | /* | |
115 | * Fallback for systems which don't have fmemopen. Copy buffer to a | |
116 | * temporary file, and use that file as FILE * input. | |
117 | */ | |
118 | static inline | |
119 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) | |
120 | { | |
121 | char *tmpname; | |
122 | size_t len; | |
123 | FILE *fp; | |
124 | int ret; | |
125 | ||
126 | /* | |
127 | * Support reading only. | |
128 | */ | |
129 | if (strcmp(mode, "rb") != 0) { | |
130 | return NULL; | |
131 | } | |
132 | ||
133 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
f8370579 MD |
134 | ret = mkstemp(tmpname); |
135 | if (ret < 0) { | |
b776eaa4 | 136 | g_free(tmpname); |
f8370579 MD |
137 | return NULL; |
138 | } | |
139 | /* | |
140 | * We need to write to the file. | |
141 | */ | |
142 | fp = fdopen(ret, "w+"); | |
143 | if (!fp) { | |
144 | goto error_unlink; | |
145 | } | |
146 | /* Copy the entire buffer to the file */ | |
147 | len = fwrite(buf, sizeof(char), size, fp); | |
148 | if (len != size) { | |
149 | goto error_close; | |
150 | } | |
151 | ret = fseek(fp, 0L, SEEK_SET); | |
152 | if (ret < 0) { | |
153 | perror("fseek"); | |
154 | goto error_close; | |
155 | } | |
156 | /* We keep the handle open, but can unlink the file on the VFS. */ | |
157 | ret = unlink(tmpname); | |
158 | if (ret < 0) { | |
159 | perror("unlink"); | |
160 | } | |
b776eaa4 | 161 | g_free(tmpname); |
f8370579 MD |
162 | return fp; |
163 | ||
164 | error_close: | |
165 | ret = fclose(fp); | |
166 | if (ret < 0) { | |
167 | perror("close"); | |
168 | } | |
169 | error_unlink: | |
170 | ret = unlink(tmpname); | |
171 | if (ret < 0) { | |
172 | perror("unlink"); | |
173 | } | |
b776eaa4 | 174 | g_free(tmpname); |
f8370579 MD |
175 | return NULL; |
176 | } | |
177 | ||
b776eaa4 MJ |
178 | #endif /* __MINGW32__ */ |
179 | ||
f8370579 MD |
180 | #endif /* BABELTRACE_HAVE_FMEMOPEN */ |
181 | ||
b776eaa4 | 182 | |
f8370579 MD |
183 | #ifdef BABELTRACE_HAVE_OPEN_MEMSTREAM |
184 | ||
185 | #include <stdio.h> | |
186 | ||
187 | static inline | |
0cbbc8b8 | 188 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) |
f8370579 MD |
189 | { |
190 | return open_memstream(ptr, sizeloc); | |
191 | } | |
192 | ||
193 | static inline | |
0cbbc8b8 | 194 | int bt_close_memstream(char **buf, size_t *size, FILE *fp) |
f8370579 MD |
195 | { |
196 | return fclose(fp); | |
197 | } | |
198 | ||
199 | #else /* BABELTRACE_HAVE_OPEN_MEMSTREAM */ | |
200 | ||
201 | #include <stdlib.h> | |
202 | #include <stdio.h> | |
b776eaa4 MJ |
203 | #include <glib.h> |
204 | ||
205 | #ifdef __MINGW32__ | |
206 | ||
207 | /* | |
208 | * Fallback for systems which don't have open_memstream. Create FILE * | |
209 | * with bt_open_memstream, but require call to | |
210 | * bt_close_memstream to flush all data written to the FILE * | |
211 | * into the buffer (which we allocate). | |
212 | */ | |
213 | static inline | |
214 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) | |
215 | { | |
216 | char *tmpname; | |
217 | FILE *fp; | |
218 | ||
219 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
220 | ||
221 | if (_mktemp(tmpname) == NULL) { | |
222 | goto error_free; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Open as a read/write binary temporary deleted on close file. | |
227 | * Will be deleted when the last file pointer is closed. | |
228 | */ | |
229 | fp = fopen(tmpname, "w+bTD"); | |
230 | if (!fp) { | |
231 | goto error_free; | |
232 | } | |
233 | ||
234 | g_free(tmpname); | |
235 | return fp; | |
236 | ||
237 | error_free: | |
238 | g_free(tmpname); | |
239 | return NULL; | |
240 | } | |
241 | ||
242 | #else /* __MINGW32__ */ | |
f8370579 MD |
243 | |
244 | /* | |
245 | * Fallback for systems which don't have open_memstream. Create FILE * | |
0cbbc8b8 MJ |
246 | * with bt_open_memstream, but require call to |
247 | * bt_close_memstream to flush all data written to the FILE * | |
f8370579 MD |
248 | * into the buffer (which we allocate). |
249 | */ | |
250 | static inline | |
0cbbc8b8 | 251 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) |
f8370579 | 252 | { |
b776eaa4 | 253 | char *tmpname; |
f8370579 MD |
254 | int ret; |
255 | FILE *fp; | |
256 | ||
b776eaa4 MJ |
257 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); |
258 | ||
f8370579 MD |
259 | ret = mkstemp(tmpname); |
260 | if (ret < 0) { | |
b776eaa4 MJ |
261 | perror("mkstemp"); |
262 | g_free(tmpname); | |
f8370579 MD |
263 | return NULL; |
264 | } | |
265 | fp = fdopen(ret, "w+"); | |
266 | if (!fp) { | |
267 | goto error_unlink; | |
268 | } | |
269 | /* | |
270 | * babeltrace_flush_memstream will update the buffer content | |
271 | * with read from fp. No need to keep the file around, just the | |
272 | * handle. | |
273 | */ | |
274 | ret = unlink(tmpname); | |
275 | if (ret < 0) { | |
276 | perror("unlink"); | |
277 | } | |
b776eaa4 | 278 | g_free(tmpname); |
f8370579 MD |
279 | return fp; |
280 | ||
281 | error_unlink: | |
282 | ret = unlink(tmpname); | |
283 | if (ret < 0) { | |
284 | perror("unlink"); | |
285 | } | |
b776eaa4 | 286 | g_free(tmpname); |
f8370579 MD |
287 | return NULL; |
288 | } | |
289 | ||
b776eaa4 MJ |
290 | #endif /* __MINGW32__ */ |
291 | ||
f8370579 MD |
292 | /* Get file size, allocate buffer, copy. */ |
293 | static inline | |
0cbbc8b8 | 294 | int bt_close_memstream(char **buf, size_t *size, FILE *fp) |
f8370579 MD |
295 | { |
296 | size_t len, n; | |
297 | long pos; | |
298 | int ret; | |
299 | ||
300 | ret = fflush(fp); | |
301 | if (ret < 0) { | |
302 | perror("fflush"); | |
303 | return ret; | |
304 | } | |
305 | ret = fseek(fp, 0L, SEEK_END); | |
306 | if (ret < 0) { | |
307 | perror("fseek"); | |
308 | return ret; | |
309 | } | |
310 | pos = ftell(fp); | |
311 | if (ret < 0) { | |
312 | perror("ftell"); | |
313 | return ret; | |
314 | } | |
315 | *size = pos; | |
316 | /* add final \0 */ | |
317 | *buf = calloc(pos + 1, sizeof(char)); | |
318 | if (!*buf) { | |
319 | return -ENOMEM; | |
320 | } | |
321 | ret = fseek(fp, 0L, SEEK_SET); | |
322 | if (ret < 0) { | |
323 | perror("fseek"); | |
324 | goto error_free; | |
325 | } | |
326 | /* Copy the entire file into the buffer */ | |
327 | n = 0; | |
328 | clearerr(fp); | |
329 | while (!feof(fp) && !ferror(fp) && (*size - n > 0)) { | |
330 | len = fread(*buf, sizeof(char), *size - n, fp); | |
331 | n += len; | |
332 | } | |
333 | if (n != *size) { | |
334 | ret = -1; | |
335 | goto error_close; | |
336 | } | |
337 | ret = fclose(fp); | |
338 | if (ret < 0) { | |
339 | perror("fclose"); | |
340 | return ret; | |
341 | } | |
342 | return 0; | |
343 | ||
344 | error_close: | |
345 | ret = fclose(fp); | |
346 | if (ret < 0) { | |
347 | perror("fclose"); | |
348 | } | |
349 | error_free: | |
350 | free(*buf); | |
351 | *buf = NULL; | |
352 | return ret; | |
353 | } | |
354 | ||
355 | #endif /* BABELTRACE_HAVE_OPEN_MEMSTREAM */ | |
356 | ||
357 | #endif /* _BABELTRACE_FORMAT_CTF_MEMSTREAM_H */ |