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f8370579 MD |
1 | #ifndef _BABELTRACE_FORMAT_CTF_MEMSTREAM_H |
2 | #define _BABELTRACE_FORMAT_CTF_MEMSTREAM_H | |
3 | ||
4 | /* | |
f8370579 MD |
5 | * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
6 | * | |
7 | * memstream compatibility layer. | |
8 | * | |
eb31c5e6 MD |
9 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
10 | * of this software and associated documentation files (the "Software"), to deal | |
11 | * in the Software without restriction, including without limitation the rights | |
12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
13 | * copies of the Software, and to permit persons to whom the Software is | |
14 | * furnished to do so, subject to the following conditions: | |
f8370579 | 15 | * |
eb31c5e6 MD |
16 | * The above copyright notice and this permission notice shall be included in |
17 | * all copies or substantial portions of the Software. | |
c462e188 MD |
18 | * |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
25 | * SOFTWARE. | |
f8370579 MD |
26 | */ |
27 | ||
f8370579 MD |
28 | #ifdef BABELTRACE_HAVE_FMEMOPEN |
29 | #include <stdio.h> | |
30 | ||
31 | static inline | |
0cbbc8b8 | 32 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) |
f8370579 MD |
33 | { |
34 | return fmemopen(buf, size, mode); | |
35 | } | |
36 | ||
37 | #else /* BABELTRACE_HAVE_FMEMOPEN */ | |
38 | ||
2e478c7f | 39 | #include <unistd.h> |
f8370579 MD |
40 | #include <stdlib.h> |
41 | #include <stdio.h> | |
b776eaa4 MJ |
42 | #include <string.h> |
43 | #include <errno.h> | |
57952005 | 44 | #include "compat/endian.h" |
b776eaa4 MJ |
45 | |
46 | #ifdef __MINGW32__ | |
47 | ||
48 | #include <io.h> | |
49 | #include <glib.h> | |
f8370579 MD |
50 | |
51 | /* | |
52 | * Fallback for systems which don't have fmemopen. Copy buffer to a | |
53 | * temporary file, and use that file as FILE * input. | |
54 | */ | |
55 | static inline | |
0cbbc8b8 | 56 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) |
f8370579 | 57 | { |
b776eaa4 | 58 | char *tmpname; |
f8370579 MD |
59 | size_t len; |
60 | FILE *fp; | |
61 | int ret; | |
62 | ||
63 | /* | |
64 | * Support reading only. | |
65 | */ | |
66 | if (strcmp(mode, "rb") != 0) { | |
67 | return NULL; | |
68 | } | |
b776eaa4 MJ |
69 | |
70 | /* Build a temporary filename */ | |
71 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
8e01f2d9 | 72 | if (!_mktemp(tmpname)) { |
b776eaa4 MJ |
73 | goto error_free; |
74 | } | |
75 | ||
76 | /* | |
77 | * Open as a read/write binary temporary deleted on close file. | |
78 | * Will be deleted when the last file pointer is closed. | |
79 | */ | |
80 | fp = fopen(tmpname, "w+bTD"); | |
81 | if (!fp) { | |
82 | goto error_free; | |
83 | } | |
84 | ||
85 | /* Copy the entire buffer to the file */ | |
86 | len = fwrite(buf, sizeof(char), size, fp); | |
87 | if (len != size) { | |
88 | goto error_close; | |
89 | } | |
90 | ||
91 | /* Set the file pointer to the start of file */ | |
92 | ret = fseek(fp, 0L, SEEK_SET); | |
93 | if (ret < 0) { | |
94 | perror("fseek"); | |
95 | goto error_close; | |
96 | } | |
97 | ||
98 | g_free(tmpname); | |
99 | return fp; | |
100 | ||
101 | error_close: | |
102 | ret = fclose(fp); | |
103 | if (ret < 0) { | |
104 | perror("close"); | |
105 | } | |
106 | error_free: | |
107 | g_free(tmpname); | |
108 | return NULL; | |
109 | } | |
110 | ||
111 | #else /* __MINGW32__ */ | |
112 | ||
113 | /* | |
114 | * Fallback for systems which don't have fmemopen. Copy buffer to a | |
115 | * temporary file, and use that file as FILE * input. | |
116 | */ | |
117 | static inline | |
118 | FILE *bt_fmemopen(void *buf, size_t size, const char *mode) | |
119 | { | |
120 | char *tmpname; | |
121 | size_t len; | |
122 | FILE *fp; | |
123 | int ret; | |
124 | ||
125 | /* | |
126 | * Support reading only. | |
127 | */ | |
128 | if (strcmp(mode, "rb") != 0) { | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
f8370579 MD |
133 | ret = mkstemp(tmpname); |
134 | if (ret < 0) { | |
b776eaa4 | 135 | g_free(tmpname); |
f8370579 MD |
136 | return NULL; |
137 | } | |
138 | /* | |
139 | * We need to write to the file. | |
140 | */ | |
ec5cfb17 | 141 | fp = fdopen(ret, "wb+"); |
f8370579 MD |
142 | if (!fp) { |
143 | goto error_unlink; | |
144 | } | |
145 | /* Copy the entire buffer to the file */ | |
146 | len = fwrite(buf, sizeof(char), size, fp); | |
147 | if (len != size) { | |
148 | goto error_close; | |
149 | } | |
150 | ret = fseek(fp, 0L, SEEK_SET); | |
151 | if (ret < 0) { | |
152 | perror("fseek"); | |
153 | goto error_close; | |
154 | } | |
155 | /* We keep the handle open, but can unlink the file on the VFS. */ | |
156 | ret = unlink(tmpname); | |
157 | if (ret < 0) { | |
158 | perror("unlink"); | |
159 | } | |
b776eaa4 | 160 | g_free(tmpname); |
f8370579 MD |
161 | return fp; |
162 | ||
163 | error_close: | |
164 | ret = fclose(fp); | |
165 | if (ret < 0) { | |
166 | perror("close"); | |
167 | } | |
168 | error_unlink: | |
169 | ret = unlink(tmpname); | |
170 | if (ret < 0) { | |
171 | perror("unlink"); | |
172 | } | |
b776eaa4 | 173 | g_free(tmpname); |
f8370579 MD |
174 | return NULL; |
175 | } | |
176 | ||
b776eaa4 MJ |
177 | #endif /* __MINGW32__ */ |
178 | ||
f8370579 MD |
179 | #endif /* BABELTRACE_HAVE_FMEMOPEN */ |
180 | ||
b776eaa4 | 181 | |
f8370579 MD |
182 | #ifdef BABELTRACE_HAVE_OPEN_MEMSTREAM |
183 | ||
184 | #include <stdio.h> | |
185 | ||
186 | static inline | |
0cbbc8b8 | 187 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) |
f8370579 MD |
188 | { |
189 | return open_memstream(ptr, sizeloc); | |
190 | } | |
191 | ||
192 | static inline | |
0cbbc8b8 | 193 | int bt_close_memstream(char **buf, size_t *size, FILE *fp) |
f8370579 MD |
194 | { |
195 | return fclose(fp); | |
196 | } | |
197 | ||
198 | #else /* BABELTRACE_HAVE_OPEN_MEMSTREAM */ | |
199 | ||
200 | #include <stdlib.h> | |
201 | #include <stdio.h> | |
b776eaa4 MJ |
202 | #include <glib.h> |
203 | ||
204 | #ifdef __MINGW32__ | |
205 | ||
206 | /* | |
207 | * Fallback for systems which don't have open_memstream. Create FILE * | |
208 | * with bt_open_memstream, but require call to | |
209 | * bt_close_memstream to flush all data written to the FILE * | |
210 | * into the buffer (which we allocate). | |
211 | */ | |
212 | static inline | |
213 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) | |
214 | { | |
215 | char *tmpname; | |
216 | FILE *fp; | |
217 | ||
218 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); | |
219 | ||
8e01f2d9 | 220 | if (!_mktemp(tmpname)) { |
b776eaa4 MJ |
221 | goto error_free; |
222 | } | |
223 | ||
224 | /* | |
225 | * Open as a read/write binary temporary deleted on close file. | |
226 | * Will be deleted when the last file pointer is closed. | |
227 | */ | |
228 | fp = fopen(tmpname, "w+bTD"); | |
229 | if (!fp) { | |
230 | goto error_free; | |
231 | } | |
232 | ||
233 | g_free(tmpname); | |
234 | return fp; | |
235 | ||
236 | error_free: | |
237 | g_free(tmpname); | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | #else /* __MINGW32__ */ | |
f8370579 MD |
242 | |
243 | /* | |
244 | * Fallback for systems which don't have open_memstream. Create FILE * | |
0cbbc8b8 MJ |
245 | * with bt_open_memstream, but require call to |
246 | * bt_close_memstream to flush all data written to the FILE * | |
f8370579 MD |
247 | * into the buffer (which we allocate). |
248 | */ | |
249 | static inline | |
0cbbc8b8 | 250 | FILE *bt_open_memstream(char **ptr, size_t *sizeloc) |
f8370579 | 251 | { |
b776eaa4 | 252 | char *tmpname; |
f8370579 MD |
253 | int ret; |
254 | FILE *fp; | |
255 | ||
b776eaa4 MJ |
256 | tmpname = g_build_filename(g_get_tmp_dir(), "babeltrace-tmp-XXXXXX", NULL); |
257 | ||
f8370579 MD |
258 | ret = mkstemp(tmpname); |
259 | if (ret < 0) { | |
b776eaa4 MJ |
260 | perror("mkstemp"); |
261 | g_free(tmpname); | |
f8370579 MD |
262 | return NULL; |
263 | } | |
ec5cfb17 | 264 | fp = fdopen(ret, "wb+"); |
f8370579 MD |
265 | if (!fp) { |
266 | goto error_unlink; | |
267 | } | |
268 | /* | |
269 | * babeltrace_flush_memstream will update the buffer content | |
270 | * with read from fp. No need to keep the file around, just the | |
271 | * handle. | |
272 | */ | |
273 | ret = unlink(tmpname); | |
274 | if (ret < 0) { | |
275 | perror("unlink"); | |
276 | } | |
b776eaa4 | 277 | g_free(tmpname); |
f8370579 MD |
278 | return fp; |
279 | ||
280 | error_unlink: | |
281 | ret = unlink(tmpname); | |
282 | if (ret < 0) { | |
283 | perror("unlink"); | |
284 | } | |
b776eaa4 | 285 | g_free(tmpname); |
f8370579 MD |
286 | return NULL; |
287 | } | |
288 | ||
b776eaa4 MJ |
289 | #endif /* __MINGW32__ */ |
290 | ||
f8370579 MD |
291 | /* Get file size, allocate buffer, copy. */ |
292 | static inline | |
0cbbc8b8 | 293 | int bt_close_memstream(char **buf, size_t *size, FILE *fp) |
f8370579 MD |
294 | { |
295 | size_t len, n; | |
296 | long pos; | |
297 | int ret; | |
298 | ||
299 | ret = fflush(fp); | |
300 | if (ret < 0) { | |
301 | perror("fflush"); | |
302 | return ret; | |
303 | } | |
304 | ret = fseek(fp, 0L, SEEK_END); | |
305 | if (ret < 0) { | |
306 | perror("fseek"); | |
307 | return ret; | |
308 | } | |
309 | pos = ftell(fp); | |
310 | if (ret < 0) { | |
311 | perror("ftell"); | |
312 | return ret; | |
313 | } | |
314 | *size = pos; | |
315 | /* add final \0 */ | |
316 | *buf = calloc(pos + 1, sizeof(char)); | |
317 | if (!*buf) { | |
318 | return -ENOMEM; | |
319 | } | |
320 | ret = fseek(fp, 0L, SEEK_SET); | |
321 | if (ret < 0) { | |
322 | perror("fseek"); | |
323 | goto error_free; | |
324 | } | |
325 | /* Copy the entire file into the buffer */ | |
326 | n = 0; | |
327 | clearerr(fp); | |
328 | while (!feof(fp) && !ferror(fp) && (*size - n > 0)) { | |
329 | len = fread(*buf, sizeof(char), *size - n, fp); | |
330 | n += len; | |
331 | } | |
332 | if (n != *size) { | |
333 | ret = -1; | |
334 | goto error_close; | |
335 | } | |
336 | ret = fclose(fp); | |
337 | if (ret < 0) { | |
338 | perror("fclose"); | |
339 | return ret; | |
340 | } | |
341 | return 0; | |
342 | ||
343 | error_close: | |
344 | ret = fclose(fp); | |
345 | if (ret < 0) { | |
346 | perror("fclose"); | |
347 | } | |
348 | error_free: | |
349 | free(*buf); | |
350 | *buf = NULL; | |
351 | return ret; | |
352 | } | |
353 | ||
354 | #endif /* BABELTRACE_HAVE_OPEN_MEMSTREAM */ | |
355 | ||
356 | #endif /* _BABELTRACE_FORMAT_CTF_MEMSTREAM_H */ |