Commit | Line | Data |
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0acf065b | 1 | /* Compressed section support (intended for debug sections). |
b90efa5b | 2 | Copyright (C) 2008-2015 Free Software Foundation, Inc. |
1b315056 CS |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
1b315056 | 21 | #include "sysdep.h" |
243340ad | 22 | #include <zlib.h> |
1b315056 CS |
23 | #include "bfd.h" |
24 | #include "libbfd.h" | |
a953eec9 | 25 | #include "safe-ctype.h" |
1b315056 | 26 | |
151411f8 L |
27 | #define MAX_COMPRESSION_HEADER_SIZE 24 |
28 | ||
4a114e3e L |
29 | static bfd_boolean |
30 | decompress_contents (bfd_byte *compressed_buffer, | |
31 | bfd_size_type compressed_size, | |
32 | bfd_byte *uncompressed_buffer, | |
33 | bfd_size_type uncompressed_size) | |
34 | { | |
35 | z_stream strm; | |
36 | int rc; | |
37 | ||
38 | /* It is possible the section consists of several compressed | |
39 | buffers concatenated together, so we uncompress in a loop. */ | |
40 | strm.zalloc = NULL; | |
41 | strm.zfree = NULL; | |
42 | strm.opaque = NULL; | |
43 | strm.avail_in = compressed_size - 12; | |
44 | strm.next_in = (Bytef*) compressed_buffer + 12; | |
45 | strm.avail_out = uncompressed_size; | |
46 | ||
a253d456 | 47 | BFD_ASSERT (Z_OK == 0); |
4a114e3e | 48 | rc = inflateInit (&strm); |
a29a8af8 | 49 | while (strm.avail_in > 0 && strm.avail_out > 0) |
4a114e3e L |
50 | { |
51 | if (rc != Z_OK) | |
a253d456 | 52 | break; |
4a114e3e L |
53 | strm.next_out = ((Bytef*) uncompressed_buffer |
54 | + (uncompressed_size - strm.avail_out)); | |
55 | rc = inflate (&strm, Z_FINISH); | |
56 | if (rc != Z_STREAM_END) | |
a253d456 | 57 | break; |
4a114e3e L |
58 | rc = inflateReset (&strm); |
59 | } | |
a253d456 | 60 | rc |= inflateEnd (&strm); |
82c6068a | 61 | return rc == Z_OK && strm.avail_out == 0; |
4a114e3e | 62 | } |
4a114e3e | 63 | |
0b0732e1 L |
64 | /* Compress data of the size specified in @var{uncompressed_size} |
65 | and pointed to by @var{uncompressed_buffer} using zlib and store | |
66 | as the contents field. This function assumes the contents | |
67 | field was allocated using bfd_malloc() or equivalent. If zlib | |
68 | is not installed on this machine, the input is unmodified. | |
1b315056 | 69 | |
151411f8 L |
70 | Return the uncompressed size if the full section contents is |
71 | compressed successfully. Otherwise return 0. */ | |
1b315056 | 72 | |
151411f8 L |
73 | static bfd_size_type |
74 | bfd_compress_section_contents (bfd *abfd, sec_ptr sec, | |
243340ad L |
75 | bfd_byte *uncompressed_buffer, |
76 | bfd_size_type uncompressed_size) | |
1b315056 | 77 | { |
ae6a0217 | 78 | uLong compressed_size; |
151411f8 L |
79 | bfd_byte *buffer; |
80 | bfd_size_type buffer_size; | |
81 | bfd_boolean decompress; | |
82 | int zlib_size; | |
83 | int orig_compression_header_size; | |
84 | int compression_header_size | |
85 | = bfd_get_compression_header_size (abfd, NULL); | |
86 | bfd_boolean compressed | |
87 | = bfd_is_section_compressed_with_header (abfd, sec, | |
88 | &orig_compression_header_size); | |
89 | ||
90 | if (compressed) | |
91 | { | |
92 | /* We shouldn't decompress unsupported compressed section. */ | |
93 | if (orig_compression_header_size < 0) | |
94 | abort (); | |
4a114e3e | 95 | |
151411f8 L |
96 | /* Different compression schemes. Just move the compressed section |
97 | contents to the right position. */ | |
98 | if (orig_compression_header_size == 0) | |
99 | { | |
100 | /* Convert it from .zdebug* section. Get the uncompressed | |
101 | size first. */ | |
102 | zlib_size = uncompressed_size; | |
103 | compressed_size = zlib_size + compression_header_size; | |
104 | uncompressed_size = bfd_getb64 (uncompressed_buffer + 4); | |
105 | } | |
106 | else | |
107 | { | |
108 | /* Convert it to .zdebug* section. */ | |
109 | zlib_size = uncompressed_size - orig_compression_header_size; | |
110 | compressed_size = zlib_size; | |
111 | } | |
112 | } | |
113 | else | |
114 | compressed_size = compressBound (uncompressed_size) + 12; | |
4281caad | 115 | |
151411f8 L |
116 | /* When converting from .zdebug* section, uncompress if it leads to |
117 | smaller size. */ | |
118 | if (compressed | |
119 | && orig_compression_header_size == 0 | |
120 | && compressed_size > uncompressed_size) | |
4a114e3e | 121 | { |
151411f8 L |
122 | decompress = TRUE; |
123 | buffer_size = uncompressed_size; | |
4a114e3e | 124 | } |
151411f8 L |
125 | else |
126 | { | |
127 | decompress = FALSE; | |
128 | buffer_size = compressed_size + compression_header_size; | |
129 | } | |
130 | buffer = (bfd_byte *) bfd_malloc (buffer_size); | |
131 | if (buffer == NULL) | |
132 | return 0; | |
4a114e3e | 133 | |
151411f8 | 134 | if (compressed) |
8d001214 | 135 | { |
151411f8 L |
136 | sec->size = uncompressed_size; |
137 | if (decompress) | |
138 | { | |
139 | if (!decompress_contents (uncompressed_buffer, zlib_size, | |
140 | buffer, uncompressed_size)) | |
141 | { | |
142 | bfd_set_error (bfd_error_bad_value); | |
143 | free (buffer); | |
144 | return 0; | |
145 | } | |
146 | free (uncompressed_buffer); | |
147 | sec->contents = buffer; | |
148 | sec->compress_status = COMPRESS_SECTION_DONE; | |
149 | return uncompressed_size; | |
150 | } | |
151 | else | |
152 | { | |
153 | bfd_update_compression_header (abfd, buffer, sec); | |
154 | memmove (buffer + compression_header_size, | |
155 | uncompressed_buffer + orig_compression_header_size, | |
156 | zlib_size); | |
157 | } | |
8d001214 L |
158 | } |
159 | else | |
160 | { | |
151411f8 L |
161 | bfd_size_type size = uncompressed_size; |
162 | int header_size = 12 + compression_header_size; | |
163 | if (compress ((Bytef*) buffer + header_size, | |
164 | &compressed_size, | |
165 | (const Bytef*) uncompressed_buffer, | |
166 | uncompressed_size) != Z_OK) | |
167 | { | |
168 | free (buffer); | |
169 | bfd_set_error (bfd_error_bad_value); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | compressed_size += header_size; | |
174 | /* PR binutils/18087: If compression didn't make the section smaller, | |
175 | just keep it uncompressed. */ | |
176 | if (compressed_size < uncompressed_size) | |
177 | { | |
178 | bfd_update_compression_header (abfd, buffer, sec); | |
179 | ||
180 | /* Write the zlib header. In this case, it should be "ZLIB" | |
181 | followed by the uncompressed section size, 8 bytes in | |
182 | big-endian order. */ | |
183 | memcpy (buffer + compression_header_size, "ZLIB", 4); | |
184 | bfd_putb64 (size, buffer + compression_header_size + 4); | |
185 | } | |
186 | else | |
187 | { | |
188 | sec->contents = uncompressed_buffer; | |
189 | sec->compress_status = COMPRESS_SECTION_NONE; | |
190 | return uncompressed_size; | |
191 | } | |
8d001214 | 192 | } |
4a114e3e | 193 | |
151411f8 L |
194 | free (uncompressed_buffer); |
195 | sec->contents = buffer; | |
196 | sec->size = compressed_size; | |
197 | sec->compress_status = COMPRESS_SECTION_DONE; | |
198 | ||
199 | return uncompressed_size; | |
4a114e3e L |
200 | } |
201 | ||
202 | /* | |
203 | FUNCTION | |
204 | bfd_get_full_section_contents | |
205 | ||
206 | SYNOPSIS | |
207 | bfd_boolean bfd_get_full_section_contents | |
208 | (bfd *abfd, asection *section, bfd_byte **ptr); | |
209 | ||
210 | DESCRIPTION | |
211 | Read all data from @var{section} in BFD @var{abfd}, decompress | |
212 | if needed, and store in @var{*ptr}. If @var{*ptr} is NULL, | |
68ffbac6 | 213 | return @var{*ptr} with memory malloc'd by this function. |
4a114e3e L |
214 | |
215 | Return @code{TRUE} if the full section contents is retrieved | |
06614111 NC |
216 | successfully. If the section has no contents then this function |
217 | returns @code{TRUE} but @var{*ptr} is set to NULL. | |
4a114e3e L |
218 | */ |
219 | ||
220 | bfd_boolean | |
221 | bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr) | |
222 | { | |
e57278ef | 223 | bfd_size_type sz; |
4a114e3e | 224 | bfd_byte *p = *ptr; |
82c6068a | 225 | bfd_boolean ret; |
38b774d2 AM |
226 | bfd_size_type save_size; |
227 | bfd_size_type save_rawsize; | |
4a114e3e | 228 | bfd_byte *compressed_buffer; |
151411f8 | 229 | unsigned int compression_header_size; |
4a114e3e | 230 | |
e57278ef AM |
231 | if (abfd->direction != write_direction && sec->rawsize != 0) |
232 | sz = sec->rawsize; | |
233 | else | |
234 | sz = sec->size; | |
4a114e3e | 235 | if (sz == 0) |
06614111 NC |
236 | { |
237 | *ptr = NULL; | |
238 | return TRUE; | |
239 | } | |
4a114e3e L |
240 | |
241 | switch (sec->compress_status) | |
242 | { | |
243 | case COMPRESS_SECTION_NONE: | |
244 | if (p == NULL) | |
245 | { | |
0d13c96b | 246 | p = (bfd_byte *) bfd_malloc (sz); |
4a114e3e L |
247 | if (p == NULL) |
248 | return FALSE; | |
4a114e3e | 249 | } |
06614111 | 250 | |
82c6068a AM |
251 | if (!bfd_get_section_contents (abfd, sec, p, 0, sz)) |
252 | { | |
253 | if (*ptr != p) | |
254 | free (p); | |
255 | return FALSE; | |
256 | } | |
257 | *ptr = p; | |
4a114e3e L |
258 | return TRUE; |
259 | ||
260 | case DECOMPRESS_SECTION_SIZED: | |
82c6068a | 261 | /* Read in the full compressed section contents. */ |
38b774d2 | 262 | compressed_buffer = (bfd_byte *) bfd_malloc (sec->compressed_size); |
82c6068a AM |
263 | if (compressed_buffer == NULL) |
264 | return FALSE; | |
38b774d2 AM |
265 | save_rawsize = sec->rawsize; |
266 | save_size = sec->size; | |
82c6068a AM |
267 | /* Clear rawsize, set size to compressed size and set compress_status |
268 | to COMPRESS_SECTION_NONE. If the compressed size is bigger than | |
269 | the uncompressed size, bfd_get_section_contents will fail. */ | |
270 | sec->rawsize = 0; | |
38b774d2 | 271 | sec->size = sec->compressed_size; |
82c6068a AM |
272 | sec->compress_status = COMPRESS_SECTION_NONE; |
273 | ret = bfd_get_section_contents (abfd, sec, compressed_buffer, | |
38b774d2 | 274 | 0, sec->compressed_size); |
82c6068a | 275 | /* Restore rawsize and size. */ |
38b774d2 AM |
276 | sec->rawsize = save_rawsize; |
277 | sec->size = save_size; | |
4a114e3e | 278 | sec->compress_status = DECOMPRESS_SECTION_SIZED; |
82c6068a AM |
279 | if (!ret) |
280 | goto fail_compressed; | |
4a114e3e | 281 | |
38b774d2 AM |
282 | if (p == NULL) |
283 | p = (bfd_byte *) bfd_malloc (sz); | |
284 | if (p == NULL) | |
4a114e3e | 285 | goto fail_compressed; |
4a114e3e | 286 | |
151411f8 L |
287 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
288 | if (!decompress_contents (compressed_buffer + compression_header_size, | |
289 | sec->compressed_size, p, sz)) | |
82c6068a AM |
290 | { |
291 | bfd_set_error (bfd_error_bad_value); | |
38b774d2 AM |
292 | if (p != *ptr) |
293 | free (p); | |
82c6068a AM |
294 | fail_compressed: |
295 | free (compressed_buffer); | |
296 | return FALSE; | |
297 | } | |
4a114e3e | 298 | |
82c6068a | 299 | free (compressed_buffer); |
38b774d2 AM |
300 | *ptr = p; |
301 | return TRUE; | |
4a114e3e | 302 | |
82c6068a | 303 | case COMPRESS_SECTION_DONE: |
db6b071a NC |
304 | if (sec->contents == NULL) |
305 | return FALSE; | |
82c6068a AM |
306 | if (p == NULL) |
307 | { | |
308 | p = (bfd_byte *) bfd_malloc (sz); | |
309 | if (p == NULL) | |
310 | return FALSE; | |
311 | *ptr = p; | |
312 | } | |
06614111 NC |
313 | /* PR 17512; file: 5bc29788. */ |
314 | if (p != sec->contents) | |
315 | memcpy (p, sec->contents, sz); | |
82c6068a | 316 | return TRUE; |
4a114e3e | 317 | |
82c6068a AM |
318 | default: |
319 | abort (); | |
320 | } | |
4a114e3e L |
321 | } |
322 | ||
8a72cc6e AM |
323 | /* |
324 | FUNCTION | |
325 | bfd_cache_section_contents | |
326 | ||
327 | SYNOPSIS | |
328 | void bfd_cache_section_contents | |
329 | (asection *sec, void *contents); | |
330 | ||
331 | DESCRIPTION | |
332 | Stash @var(contents) so any following reads of @var(sec) do | |
333 | not need to decompress again. | |
334 | */ | |
335 | ||
336 | void | |
337 | bfd_cache_section_contents (asection *sec, void *contents) | |
338 | { | |
339 | if (sec->compress_status == DECOMPRESS_SECTION_SIZED) | |
340 | sec->compress_status = COMPRESS_SECTION_DONE; | |
341 | sec->contents = contents; | |
342 | sec->flags |= SEC_IN_MEMORY; | |
343 | } | |
344 | ||
4a114e3e L |
345 | /* |
346 | FUNCTION | |
151411f8 | 347 | bfd_is_section_compressed_with_header |
4a114e3e L |
348 | |
349 | SYNOPSIS | |
151411f8 L |
350 | bfd_boolean bfd_is_section_compressed_with_header |
351 | (bfd *abfd, asection *section, | |
352 | int *compression_header_size_p); | |
4a114e3e L |
353 | |
354 | DESCRIPTION | |
151411f8 L |
355 | Return @code{TRUE} if @var{section} is compressed. Compression |
356 | header size is returned in @var{compression_header_size_p}. If | |
357 | compression is unsupported, compression header size is returned | |
358 | with -1. | |
4a114e3e L |
359 | */ |
360 | ||
361 | bfd_boolean | |
151411f8 L |
362 | bfd_is_section_compressed_with_header (bfd *abfd, sec_ptr sec, |
363 | int *compression_header_size_p) | |
4a114e3e | 364 | { |
151411f8 L |
365 | bfd_byte header[MAX_COMPRESSION_HEADER_SIZE + 12]; |
366 | int compression_header_size; | |
367 | int header_size = 12; | |
64f40162 L |
368 | unsigned int saved = sec->compress_status; |
369 | bfd_boolean compressed; | |
370 | ||
151411f8 L |
371 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
372 | if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE) | |
373 | abort (); | |
374 | header_size += compression_header_size; | |
375 | ||
64f40162 L |
376 | /* Don't decompress the section. */ |
377 | sec->compress_status = COMPRESS_SECTION_NONE; | |
4a114e3e L |
378 | |
379 | /* Read the zlib header. In this case, it should be "ZLIB" followed | |
380 | by the uncompressed section size, 8 bytes in big-endian order. */ | |
151411f8 L |
381 | compressed = bfd_get_section_contents (abfd, sec, header, 0, |
382 | header_size) | |
383 | && CONST_STRNEQ ((char*) header + compression_header_size, | |
384 | "ZLIB"); | |
64f40162 | 385 | |
151411f8 L |
386 | if (compressed) |
387 | { | |
388 | if (compression_header_size != 0) | |
389 | { | |
390 | bfd_size_type uncompressed_size | |
391 | = bfd_getb64 ((bfd_byte *) header | |
392 | + compression_header_size + 4); | |
393 | if (!bfd_check_compression_header (abfd, header, sec, | |
394 | uncompressed_size)) | |
395 | compression_header_size = -1; | |
396 | } | |
397 | /* Check for the pathalogical case of a debug string section that | |
398 | contains the string ZLIB.... as the first entry. We assume that | |
399 | no uncompressed .debug_str section would ever be big enough to | |
400 | have the first byte of its (big-endian) size be non-zero. */ | |
401 | else if (strcmp (sec->name, ".debug_str") == 0 | |
402 | && ISPRINT (header[compression_header_size + 4])) | |
403 | compressed = FALSE; | |
404 | } | |
a953eec9 | 405 | |
64f40162 L |
406 | /* Restore compress_status. */ |
407 | sec->compress_status = saved; | |
151411f8 | 408 | *compression_header_size_p = compression_header_size; |
64f40162 | 409 | return compressed; |
4a114e3e L |
410 | } |
411 | ||
151411f8 L |
412 | /* |
413 | FUNCTION | |
414 | bfd_is_section_compressed | |
415 | ||
416 | SYNOPSIS | |
417 | bfd_boolean bfd_is_section_compressed | |
418 | (bfd *abfd, asection *section); | |
419 | ||
420 | DESCRIPTION | |
421 | Return @code{TRUE} if @var{section} is compressed. | |
422 | */ | |
423 | ||
424 | bfd_boolean | |
425 | bfd_is_section_compressed (bfd *abfd, sec_ptr sec) | |
426 | { | |
427 | int compression_header_size; | |
428 | return (bfd_is_section_compressed_with_header (abfd, sec, | |
429 | &compression_header_size) | |
430 | && compression_header_size >= 0); | |
431 | } | |
432 | ||
4a114e3e L |
433 | /* |
434 | FUNCTION | |
435 | bfd_init_section_decompress_status | |
436 | ||
437 | SYNOPSIS | |
438 | bfd_boolean bfd_init_section_decompress_status | |
439 | (bfd *abfd, asection *section); | |
440 | ||
441 | DESCRIPTION | |
442 | Record compressed section size, update section size with | |
443 | decompressed size and set compress_status to | |
444 | DECOMPRESS_SECTION_SIZED. | |
445 | ||
446 | Return @code{FALSE} if the section is not a valid compressed | |
447 | section or zlib is not installed on this machine. Otherwise, | |
448 | return @code{TRUE}. | |
449 | */ | |
450 | ||
451 | bfd_boolean | |
243340ad | 452 | bfd_init_section_decompress_status (bfd *abfd, sec_ptr sec) |
4a114e3e | 453 | { |
151411f8 L |
454 | bfd_byte header[MAX_COMPRESSION_HEADER_SIZE + 12]; |
455 | int compression_header_size; | |
456 | int header_size = 12; | |
4a114e3e L |
457 | bfd_size_type uncompressed_size; |
458 | ||
151411f8 L |
459 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
460 | if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE) | |
461 | abort (); | |
462 | header_size += compression_header_size; | |
463 | ||
4a114e3e L |
464 | if (sec->rawsize != 0 |
465 | || sec->contents != NULL | |
466 | || sec->compress_status != COMPRESS_SECTION_NONE | |
151411f8 | 467 | || !bfd_get_section_contents (abfd, sec, header, 0, header_size)) |
4a114e3e L |
468 | { |
469 | bfd_set_error (bfd_error_invalid_operation); | |
470 | return FALSE; | |
471 | } | |
1b315056 CS |
472 | |
473 | /* Read the zlib header. In this case, it should be "ZLIB" followed | |
474 | by the uncompressed section size, 8 bytes in big-endian order. */ | |
151411f8 | 475 | if (! CONST_STRNEQ ((char*) header + compression_header_size, "ZLIB")) |
4a114e3e L |
476 | { |
477 | bfd_set_error (bfd_error_wrong_format); | |
478 | return FALSE; | |
479 | } | |
480 | ||
151411f8 L |
481 | uncompressed_size = bfd_getb64 (header + compression_header_size + 4); |
482 | if (compression_header_size != 0 | |
483 | && !bfd_check_compression_header (abfd, header, sec, | |
484 | uncompressed_size)) | |
485 | { | |
486 | bfd_set_error (bfd_error_wrong_format); | |
487 | return FALSE; | |
488 | } | |
4a114e3e L |
489 | sec->compressed_size = sec->size; |
490 | sec->size = uncompressed_size; | |
491 | sec->compress_status = DECOMPRESS_SECTION_SIZED; | |
1b315056 | 492 | |
4a114e3e | 493 | return TRUE; |
4a114e3e L |
494 | } |
495 | ||
496 | /* | |
497 | FUNCTION | |
498 | bfd_init_section_compress_status | |
499 | ||
500 | SYNOPSIS | |
501 | bfd_boolean bfd_init_section_compress_status | |
502 | (bfd *abfd, asection *section); | |
503 | ||
504 | DESCRIPTION | |
505 | If open for read, compress section, update section size with | |
506 | compressed size and set compress_status to COMPRESS_SECTION_DONE. | |
507 | ||
508 | Return @code{FALSE} if the section is not a valid compressed | |
509 | section or zlib is not installed on this machine. Otherwise, | |
510 | return @code{TRUE}. | |
511 | */ | |
512 | ||
513 | bfd_boolean | |
243340ad | 514 | bfd_init_section_compress_status (bfd *abfd, sec_ptr sec) |
4a114e3e | 515 | { |
4a114e3e L |
516 | bfd_size_type uncompressed_size; |
517 | bfd_byte *uncompressed_buffer; | |
518 | bfd_boolean ret; | |
519 | ||
520 | /* Error if not opened for read. */ | |
521 | if (abfd->direction != read_direction | |
522 | || sec->size == 0 | |
523 | || sec->rawsize != 0 | |
524 | || sec->contents != NULL | |
525 | || sec->compress_status != COMPRESS_SECTION_NONE) | |
1b315056 | 526 | { |
4a114e3e L |
527 | bfd_set_error (bfd_error_invalid_operation); |
528 | return FALSE; | |
1b315056 | 529 | } |
1b315056 | 530 | |
4a114e3e L |
531 | /* Read in the full section contents and compress it. */ |
532 | uncompressed_size = sec->size; | |
533 | uncompressed_buffer = (bfd_byte *) bfd_malloc (uncompressed_size); | |
534 | if (!bfd_get_section_contents (abfd, sec, uncompressed_buffer, | |
535 | 0, uncompressed_size)) | |
536 | ret = FALSE; | |
537 | else | |
151411f8 L |
538 | { |
539 | uncompressed_size = bfd_compress_section_contents (abfd, sec, | |
540 | uncompressed_buffer, | |
541 | uncompressed_size); | |
542 | ret = uncompressed_size != 0; | |
543 | } | |
1b315056 | 544 | |
4a114e3e | 545 | return ret; |
1b315056 | 546 | } |