1 | /* $Id: zip.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
|
---|
2 | /** @file
|
---|
3 | * IPRT - Compression.
|
---|
4 | */
|
---|
5 |
|
---|
6 | /*
|
---|
7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
|
---|
8 | *
|
---|
9 | * This file is part of VirtualBox base platform packages, as
|
---|
10 | * available from https://www.virtualbox.org.
|
---|
11 | *
|
---|
12 | * This program is free software; you can redistribute it and/or
|
---|
13 | * modify it under the terms of the GNU General Public License
|
---|
14 | * as published by the Free Software Foundation, in version 3 of the
|
---|
15 | * License.
|
---|
16 | *
|
---|
17 | * This program is distributed in the hope that it will be useful, but
|
---|
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
---|
20 | * General Public License for more details.
|
---|
21 | *
|
---|
22 | * You should have received a copy of the GNU General Public License
|
---|
23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
|
---|
24 | *
|
---|
25 | * The contents of this file may alternatively be used under the terms
|
---|
26 | * of the Common Development and Distribution License Version 1.0
|
---|
27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
|
---|
28 | * in the VirtualBox distribution, in which case the provisions of the
|
---|
29 | * CDDL are applicable instead of those of the GPL.
|
---|
30 | *
|
---|
31 | * You may elect to license modified versions of this file under the
|
---|
32 | * terms and conditions of either the GPL or the CDDL or both.
|
---|
33 | *
|
---|
34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
|
---|
35 | */
|
---|
36 |
|
---|
37 |
|
---|
38 | /*********************************************************************************************************************************
|
---|
39 | * Defined Constants And Macros *
|
---|
40 | *********************************************************************************************************************************/
|
---|
41 | #define RTZIP_USE_STORE 1
|
---|
42 | #define RTZIP_USE_ZLIB 1
|
---|
43 | //#define RTZIP_USE_BZLIB 1
|
---|
44 | #if !defined(IN_GUEST) && !defined(IPRT_NO_CRT)
|
---|
45 | # define RTZIP_USE_LZF 1
|
---|
46 | #endif
|
---|
47 | #define RTZIP_LZF_BLOCK_BY_BLOCK
|
---|
48 | //#define RTZIP_USE_LZJB 1
|
---|
49 | //#define RTZIP_USE_LZO 1
|
---|
50 |
|
---|
51 | /** @todo FastLZ? QuickLZ? Others? */
|
---|
52 |
|
---|
53 |
|
---|
54 | /*********************************************************************************************************************************
|
---|
55 | * Header Files *
|
---|
56 | *********************************************************************************************************************************/
|
---|
57 | #include <iprt/cdefs.h>
|
---|
58 | #ifdef RTZIP_USE_BZLIB
|
---|
59 | # include <bzlib.h>
|
---|
60 | #endif
|
---|
61 | #ifdef RTZIP_USE_ZLIB
|
---|
62 | # include <zlib.h>
|
---|
63 | #endif
|
---|
64 | #ifdef RTZIP_USE_LZF
|
---|
65 | RT_C_DECLS_BEGIN
|
---|
66 | # include <lzf.h>
|
---|
67 | RT_C_DECLS_END
|
---|
68 | # include <iprt/crc.h>
|
---|
69 | #endif
|
---|
70 | #ifdef RTZIP_USE_LZJB
|
---|
71 | # include "lzjb.h"
|
---|
72 | #endif
|
---|
73 | #ifdef RTZIP_USE_LZO
|
---|
74 | # include <lzo/lzo1x.h>
|
---|
75 | #endif
|
---|
76 |
|
---|
77 | #include <iprt/zip.h>
|
---|
78 | #include "internal/iprt.h"
|
---|
79 |
|
---|
80 | /*#include <iprt/asm.h>*/
|
---|
81 | #include <iprt/alloc.h>
|
---|
82 | #include <iprt/assert.h>
|
---|
83 | #include <iprt/err.h>
|
---|
84 | #include <iprt/log.h>
|
---|
85 | #include <iprt/string.h>
|
---|
86 |
|
---|
87 | #ifndef IPRT_NO_CRT
|
---|
88 | # include <errno.h>
|
---|
89 | #endif
|
---|
90 |
|
---|
91 |
|
---|
92 | /*********************************************************************************************************************************
|
---|
93 | * Structures and Typedefs *
|
---|
94 | *********************************************************************************************************************************/
|
---|
95 |
|
---|
96 | #ifdef RTZIP_USE_LZF
|
---|
97 |
|
---|
98 | /**
|
---|
99 | * LZF block header.
|
---|
100 | */
|
---|
101 | #pragma pack(1) /* paranoia */
|
---|
102 | typedef struct RTZIPLZFHDR
|
---|
103 | {
|
---|
104 | /** Magic word (RTZIPLZFHDR_MAGIC). */
|
---|
105 | uint16_t u16Magic;
|
---|
106 | /** The number of bytes of data following this header. */
|
---|
107 | uint16_t cbData;
|
---|
108 | /** The CRC32 of the block. */
|
---|
109 | uint32_t u32CRC;
|
---|
110 | /** The size of the uncompressed data in bytes. */
|
---|
111 | uint16_t cbUncompressed;
|
---|
112 | } RTZIPLZFHDR;
|
---|
113 | #pragma pack()
|
---|
114 | /** Pointer to a LZF block header. */
|
---|
115 | typedef RTZIPLZFHDR *PRTZIPLZFHDR;
|
---|
116 | /** Pointer to a const LZF block header. */
|
---|
117 | typedef const RTZIPLZFHDR *PCRTZIPLZFHDR;
|
---|
118 |
|
---|
119 | /** The magic of a LZF block header. */
|
---|
120 | #define RTZIPLZFHDR_MAGIC ('Z' | ('V' << 8))
|
---|
121 |
|
---|
122 | /** The max compressed data size.
|
---|
123 | * The maximum size of a block is currently 16KB.
|
---|
124 | * This is very important so we don't have to move input buffers around. */
|
---|
125 | #define RTZIPLZF_MAX_DATA_SIZE (16384 - sizeof(RTZIPLZFHDR))
|
---|
126 |
|
---|
127 | /** The max uncompressed data size.
|
---|
128 | * This is important so we don't overflow the spill buffer in the decompressor. */
|
---|
129 | #define RTZIPLZF_MAX_UNCOMPRESSED_DATA_SIZE (32*_1K)
|
---|
130 |
|
---|
131 | #endif /* RTZIP_USE_LZF */
|
---|
132 |
|
---|
133 |
|
---|
134 | /**
|
---|
135 | * Compressor/Decompressor instance data.
|
---|
136 | */
|
---|
137 | typedef struct RTZIPCOMP
|
---|
138 | {
|
---|
139 | /** Output buffer. */
|
---|
140 | uint8_t abBuffer[_128K];
|
---|
141 | /** Compression output consumer. */
|
---|
142 | PFNRTZIPOUT pfnOut;
|
---|
143 | /** User argument for the callback. */
|
---|
144 | void *pvUser;
|
---|
145 |
|
---|
146 | /**
|
---|
147 | * @copydoc RTZipCompress
|
---|
148 | */
|
---|
149 | DECLCALLBACKMEMBER(int, pfnCompress,(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf));
|
---|
150 |
|
---|
151 | /**
|
---|
152 | * @copydoc RTZipCompFinish
|
---|
153 | */
|
---|
154 | DECLCALLBACKMEMBER(int, pfnFinish,(PRTZIPCOMP pZip));
|
---|
155 |
|
---|
156 | /**
|
---|
157 | * @copydoc RTZipCompDestroy
|
---|
158 | */
|
---|
159 | DECLCALLBACKMEMBER(int, pfnDestroy,(PRTZIPCOMP pZip));
|
---|
160 |
|
---|
161 | /** Compression type. */
|
---|
162 | RTZIPTYPE enmType;
|
---|
163 | /** Type specific data. */
|
---|
164 | union
|
---|
165 | {
|
---|
166 | #ifdef RTZIP_USE_STORE
|
---|
167 | /** Simple storing. */
|
---|
168 | struct
|
---|
169 | {
|
---|
170 | /** Current buffer position. (where to start write) */
|
---|
171 | uint8_t *pb;
|
---|
172 | } Store;
|
---|
173 | #endif
|
---|
174 | #ifdef RTZIP_USE_ZLIB
|
---|
175 | /** Zlib stream. */
|
---|
176 | z_stream Zlib;
|
---|
177 | #endif
|
---|
178 | #ifdef RTZIP_USE_BZLIB
|
---|
179 | /** BZlib stream. */
|
---|
180 | bz_stream BZlib;
|
---|
181 | #endif
|
---|
182 | #ifdef RTZIP_USE_LZF
|
---|
183 | /** LZF stream. */
|
---|
184 | struct
|
---|
185 | {
|
---|
186 | /** Current output buffer position. */
|
---|
187 | uint8_t *pbOutput;
|
---|
188 | /** The input buffer position. */
|
---|
189 | uint8_t *pbInput;
|
---|
190 | /** The number of free bytes in the input buffer. */
|
---|
191 | size_t cbInputFree;
|
---|
192 | /** The input buffer. */
|
---|
193 | uint8_t abInput[RTZIPLZF_MAX_UNCOMPRESSED_DATA_SIZE];
|
---|
194 | } LZF;
|
---|
195 | #endif
|
---|
196 |
|
---|
197 | } u;
|
---|
198 | } RTZIPCOMP;
|
---|
199 |
|
---|
200 |
|
---|
201 |
|
---|
202 | /**
|
---|
203 | * Decompressor instance data.
|
---|
204 | */
|
---|
205 | typedef struct RTZIPDECOMP
|
---|
206 | {
|
---|
207 | /** Input buffer. */
|
---|
208 | uint8_t abBuffer[_128K];
|
---|
209 | /** Decompression input producer. */
|
---|
210 | PFNRTZIPIN pfnIn;
|
---|
211 | /** User argument for the callback. */
|
---|
212 | void *pvUser;
|
---|
213 |
|
---|
214 | /**
|
---|
215 | * @copydoc RTZipDecompress
|
---|
216 | */
|
---|
217 | DECLCALLBACKMEMBER(int, pfnDecompress,(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten));
|
---|
218 |
|
---|
219 | /**
|
---|
220 | * @copydoc RTZipDecompDestroy
|
---|
221 | */
|
---|
222 | DECLCALLBACKMEMBER(int, pfnDestroy,(PRTZIPDECOMP pZip));
|
---|
223 |
|
---|
224 | /** Compression type. */
|
---|
225 | RTZIPTYPE enmType;
|
---|
226 | /** Type specific data. */
|
---|
227 | union
|
---|
228 | {
|
---|
229 | #ifdef RTZIP_USE_STORE
|
---|
230 | /** Simple storing. */
|
---|
231 | struct
|
---|
232 | {
|
---|
233 | /** Current buffer position. (where to start read) */
|
---|
234 | uint8_t *pb;
|
---|
235 | /** Number of bytes left in the buffer. */
|
---|
236 | size_t cbBuffer;
|
---|
237 | } Store;
|
---|
238 | #endif
|
---|
239 | #ifdef RTZIP_USE_ZLIB
|
---|
240 | /** Zlib stream. */
|
---|
241 | z_stream Zlib;
|
---|
242 | #endif
|
---|
243 | #ifdef RTZIP_USE_BZLIB
|
---|
244 | /** BZlib stream. */
|
---|
245 | bz_stream BZlib;
|
---|
246 | #endif
|
---|
247 | #ifdef RTZIP_USE_LZF
|
---|
248 | /** LZF 'stream'. */
|
---|
249 | struct
|
---|
250 | {
|
---|
251 | # ifndef RTZIP_LZF_BLOCK_BY_BLOCK
|
---|
252 | /** Current input buffer position. */
|
---|
253 | uint8_t *pbInput;
|
---|
254 | /** The number of bytes left in the input buffer. */
|
---|
255 | size_t cbInput;
|
---|
256 | # endif
|
---|
257 | /** The spill buffer.
|
---|
258 | * LZF is a block based compressor and not a stream compressor. So,
|
---|
259 | * we have to decompress full blocks if we want to get any of the data.
|
---|
260 | * This buffer is to store the spill after decompressing a block. */
|
---|
261 | uint8_t abSpill[RTZIPLZF_MAX_UNCOMPRESSED_DATA_SIZE];
|
---|
262 | /** The number of bytes left spill buffer. */
|
---|
263 | unsigned cbSpill;
|
---|
264 | /** The current spill buffer position. */
|
---|
265 | uint8_t *pbSpill;
|
---|
266 | } LZF;
|
---|
267 | #endif
|
---|
268 |
|
---|
269 | } u;
|
---|
270 | } RTZIPDECOM;
|
---|
271 |
|
---|
272 |
|
---|
273 |
|
---|
274 | #ifdef RTZIP_USE_STORE
|
---|
275 |
|
---|
276 | /**
|
---|
277 | * @copydoc RTZipCompress
|
---|
278 | */
|
---|
279 | static DECLCALLBACK(int) rtZipStoreCompress(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf)
|
---|
280 | {
|
---|
281 | uint8_t *pbDst = pZip->u.Store.pb;
|
---|
282 | while (cbBuf)
|
---|
283 | {
|
---|
284 | /*
|
---|
285 | * Flush.
|
---|
286 | */
|
---|
287 | size_t cb = sizeof(pZip->abBuffer) - (size_t)(pbDst - &pZip->abBuffer[0]); /* careful here, g++ 4.1.2 screws up easily */
|
---|
288 | if (cb == 0)
|
---|
289 | {
|
---|
290 | int rc = pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer));
|
---|
291 | if (RT_FAILURE(rc))
|
---|
292 | return rc;
|
---|
293 |
|
---|
294 | cb = sizeof(pZip->abBuffer);
|
---|
295 | pbDst = &pZip->abBuffer[0];
|
---|
296 | }
|
---|
297 |
|
---|
298 | /*
|
---|
299 | * Add to the buffer and advance.
|
---|
300 | */
|
---|
301 | if (cbBuf < cb)
|
---|
302 | cb = cbBuf;
|
---|
303 | memcpy(pbDst, pvBuf, cb);
|
---|
304 |
|
---|
305 | pbDst += cb;
|
---|
306 | cbBuf -= cb;
|
---|
307 | pvBuf = (uint8_t *)pvBuf + cb;
|
---|
308 | }
|
---|
309 | pZip->u.Store.pb = pbDst;
|
---|
310 | return VINF_SUCCESS;
|
---|
311 | }
|
---|
312 |
|
---|
313 |
|
---|
314 | /**
|
---|
315 | * @copydoc RTZipCompFinish
|
---|
316 | */
|
---|
317 | static DECLCALLBACK(int) rtZipStoreCompFinish(PRTZIPCOMP pZip)
|
---|
318 | {
|
---|
319 | size_t cb = (uintptr_t)pZip->u.Store.pb - (uintptr_t)&pZip->abBuffer[0];
|
---|
320 | if (cb > 0)
|
---|
321 | {
|
---|
322 | int rc = pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], cb);
|
---|
323 | if (RT_FAILURE(rc))
|
---|
324 | return rc;
|
---|
325 | }
|
---|
326 | return VINF_SUCCESS;
|
---|
327 | }
|
---|
328 |
|
---|
329 |
|
---|
330 | /**
|
---|
331 | * @copydoc RTZipCompDestroy
|
---|
332 | */
|
---|
333 | static DECLCALLBACK(int) rtZipStoreCompDestroy(PRTZIPCOMP pZip)
|
---|
334 | {
|
---|
335 | NOREF(pZip);
|
---|
336 | return VINF_SUCCESS;
|
---|
337 | }
|
---|
338 |
|
---|
339 |
|
---|
340 | /**
|
---|
341 | * Initializes the compressor instance.
|
---|
342 | * @returns iprt status code.
|
---|
343 | * @param pZip The compressor instance.
|
---|
344 | * @param enmLevel The desired compression level.
|
---|
345 | */
|
---|
346 | static DECLCALLBACK(int) rtZipStoreCompInit(PRTZIPCOMP pZip, RTZIPLEVEL enmLevel)
|
---|
347 | {
|
---|
348 | NOREF(enmLevel);
|
---|
349 | pZip->pfnCompress = rtZipStoreCompress;
|
---|
350 | pZip->pfnFinish = rtZipStoreCompFinish;
|
---|
351 | pZip->pfnDestroy = rtZipStoreCompDestroy;
|
---|
352 |
|
---|
353 | pZip->u.Store.pb = &pZip->abBuffer[1];
|
---|
354 | return VINF_SUCCESS;
|
---|
355 | }
|
---|
356 |
|
---|
357 |
|
---|
358 | /**
|
---|
359 | * @copydoc RTZipDecompress
|
---|
360 | */
|
---|
361 | static DECLCALLBACK(int) rtZipStoreDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
---|
362 | {
|
---|
363 | size_t cbWritten = 0;
|
---|
364 | while (cbBuf)
|
---|
365 | {
|
---|
366 | /*
|
---|
367 | * Fill buffer.
|
---|
368 | */
|
---|
369 | size_t cb = pZip->u.Store.cbBuffer;
|
---|
370 | if (cb <= 0)
|
---|
371 | {
|
---|
372 | int rc = pZip->pfnIn(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer), &cb);
|
---|
373 | if (RT_FAILURE(rc))
|
---|
374 | return rc;
|
---|
375 | pZip->u.Store.cbBuffer = cb;
|
---|
376 | pZip->u.Store.pb = &pZip->abBuffer[0];
|
---|
377 | }
|
---|
378 |
|
---|
379 | /*
|
---|
380 | * No more data?
|
---|
381 | */
|
---|
382 | if (cb == 0)
|
---|
383 | {
|
---|
384 | if (pcbWritten)
|
---|
385 | {
|
---|
386 | *pcbWritten = cbWritten;
|
---|
387 | return VINF_SUCCESS;
|
---|
388 | }
|
---|
389 | return VERR_NO_DATA;
|
---|
390 | }
|
---|
391 |
|
---|
392 | /*
|
---|
393 | * Add to the buffer and advance.
|
---|
394 | */
|
---|
395 | if (cbBuf < cb)
|
---|
396 | cb = cbBuf;
|
---|
397 | memcpy(pvBuf, pZip->u.Store.pb, cb);
|
---|
398 | pZip->u.Store.pb += cb;
|
---|
399 | pZip->u.Store.cbBuffer -= cb;
|
---|
400 | cbBuf -= cb;
|
---|
401 | pvBuf = (char *)pvBuf + cb;
|
---|
402 | cbWritten += cb;
|
---|
403 | }
|
---|
404 | if (pcbWritten)
|
---|
405 | *pcbWritten = cbWritten;
|
---|
406 | return VINF_SUCCESS;
|
---|
407 | }
|
---|
408 |
|
---|
409 |
|
---|
410 | /**
|
---|
411 | * @copydoc RTZipDecompDestroy
|
---|
412 | */
|
---|
413 | static DECLCALLBACK(int) rtZipStoreDecompDestroy(PRTZIPDECOMP pZip)
|
---|
414 | {
|
---|
415 | NOREF(pZip);
|
---|
416 | return VINF_SUCCESS;
|
---|
417 | }
|
---|
418 |
|
---|
419 |
|
---|
420 | /**
|
---|
421 | * Initialize the decompressor instance.
|
---|
422 | * @returns iprt status code.
|
---|
423 | * @param pZip The decompressor instance.
|
---|
424 | */
|
---|
425 | static DECLCALLBACK(int) rtZipStoreDecompInit(PRTZIPDECOMP pZip)
|
---|
426 | {
|
---|
427 | pZip->pfnDecompress = rtZipStoreDecompress;
|
---|
428 | pZip->pfnDestroy = rtZipStoreDecompDestroy;
|
---|
429 |
|
---|
430 | pZip->u.Store.pb = &pZip->abBuffer[0];
|
---|
431 | pZip->u.Store.cbBuffer = 0;
|
---|
432 | return VINF_SUCCESS;
|
---|
433 | }
|
---|
434 |
|
---|
435 | #endif /* RTZIP_USE_STORE */
|
---|
436 |
|
---|
437 |
|
---|
438 | #ifdef RTZIP_USE_ZLIB
|
---|
439 |
|
---|
440 | /*
|
---|
441 | * Missing definitions from zutil.h. We need these constants for calling
|
---|
442 | * inflateInit2() / deflateInit2().
|
---|
443 | */
|
---|
444 | # ifndef Z_DEF_WBITS
|
---|
445 | # define Z_DEF_WBITS MAX_WBITS
|
---|
446 | # endif
|
---|
447 | # ifndef Z_DEF_MEM_LEVEL
|
---|
448 | # define Z_DEF_MEM_LEVEL 8
|
---|
449 | # endif
|
---|
450 |
|
---|
451 | /**
|
---|
452 | * Convert from zlib errno to iprt status code.
|
---|
453 | * @returns iprt status code.
|
---|
454 | * @param rc Zlib error code.
|
---|
455 | * @param fCompressing Set if we're compressing, clear if decompressing.
|
---|
456 | */
|
---|
457 | static int zipErrConvertFromZlib(int rc, bool fCompressing)
|
---|
458 | {
|
---|
459 | switch (rc)
|
---|
460 | {
|
---|
461 | case Z_OK:
|
---|
462 | return VINF_SUCCESS;
|
---|
463 |
|
---|
464 | case Z_STREAM_ERROR:
|
---|
465 | return VERR_ZIP_CORRUPTED;
|
---|
466 |
|
---|
467 | case Z_DATA_ERROR:
|
---|
468 | return fCompressing ? VERR_ZIP_ERROR : VERR_ZIP_CORRUPTED;
|
---|
469 |
|
---|
470 | case Z_MEM_ERROR:
|
---|
471 | return VERR_ZIP_NO_MEMORY;
|
---|
472 |
|
---|
473 | case Z_BUF_ERROR:
|
---|
474 | return VERR_ZIP_ERROR;
|
---|
475 |
|
---|
476 | case Z_VERSION_ERROR:
|
---|
477 | return VERR_ZIP_UNSUPPORTED_VERSION;
|
---|
478 |
|
---|
479 | case Z_ERRNO: /* We shouldn't see this status! */
|
---|
480 | default:
|
---|
481 | AssertMsgFailed(("%d\n", rc));
|
---|
482 | if (rc >= 0)
|
---|
483 | return VINF_SUCCESS;
|
---|
484 | return VERR_ZIP_ERROR;
|
---|
485 | }
|
---|
486 | }
|
---|
487 |
|
---|
488 |
|
---|
489 | /**
|
---|
490 | * @copydoc RTZipCompress
|
---|
491 | */
|
---|
492 | static DECLCALLBACK(int) rtZipZlibCompress(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf)
|
---|
493 | {
|
---|
494 | pZip->u.Zlib.next_in = (Bytef *)pvBuf;
|
---|
495 | pZip->u.Zlib.avail_in = (uInt)cbBuf; Assert(pZip->u.Zlib.avail_in == cbBuf);
|
---|
496 | while (pZip->u.Zlib.avail_in > 0)
|
---|
497 | {
|
---|
498 | /*
|
---|
499 | * Flush output buffer?
|
---|
500 | */
|
---|
501 | if (pZip->u.Zlib.avail_out <= 0)
|
---|
502 | {
|
---|
503 | int rc = pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer) - pZip->u.Zlib.avail_out);
|
---|
504 | if (RT_FAILURE(rc))
|
---|
505 | return rc;
|
---|
506 | pZip->u.Zlib.avail_out = sizeof(pZip->abBuffer);
|
---|
507 | pZip->u.Zlib.next_out = &pZip->abBuffer[0];
|
---|
508 | }
|
---|
509 |
|
---|
510 | /*
|
---|
511 | * Pass it on to zlib.
|
---|
512 | */
|
---|
513 | int rc = deflate(&pZip->u.Zlib, Z_NO_FLUSH);
|
---|
514 | if (rc != Z_OK)
|
---|
515 | return zipErrConvertFromZlib(rc, true /*fCompressing*/);
|
---|
516 | }
|
---|
517 | return VINF_SUCCESS;
|
---|
518 | }
|
---|
519 |
|
---|
520 |
|
---|
521 | /**
|
---|
522 | * @copydoc RTZipCompFinish
|
---|
523 | */
|
---|
524 | static DECLCALLBACK(int) rtZipZlibCompFinish(PRTZIPCOMP pZip)
|
---|
525 | {
|
---|
526 | int rc = Z_OK;
|
---|
527 | for (;;)
|
---|
528 | {
|
---|
529 | /*
|
---|
530 | * Flush outstanding stuff. writes.
|
---|
531 | */
|
---|
532 | if (rc == Z_STREAM_END || pZip->u.Zlib.avail_out <= 0)
|
---|
533 | {
|
---|
534 | int rc2 = pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer) - pZip->u.Zlib.avail_out);
|
---|
535 | if (RT_FAILURE(rc2))
|
---|
536 | return rc2;
|
---|
537 | pZip->u.Zlib.avail_out = sizeof(pZip->abBuffer);
|
---|
538 | pZip->u.Zlib.next_out = &pZip->abBuffer[0];
|
---|
539 | if (rc == Z_STREAM_END)
|
---|
540 | return VINF_SUCCESS;
|
---|
541 | }
|
---|
542 |
|
---|
543 | /*
|
---|
544 | * Tell zlib to flush.
|
---|
545 | */
|
---|
546 | rc = deflate(&pZip->u.Zlib, Z_FINISH);
|
---|
547 | if (rc != Z_OK && rc != Z_STREAM_END)
|
---|
548 | return zipErrConvertFromZlib(rc, true /*fCompressing*/);
|
---|
549 | }
|
---|
550 | }
|
---|
551 |
|
---|
552 |
|
---|
553 | /**
|
---|
554 | * @copydoc RTZipCompDestroy
|
---|
555 | */
|
---|
556 | static DECLCALLBACK(int) rtZipZlibCompDestroy(PRTZIPCOMP pZip)
|
---|
557 | {
|
---|
558 | /*
|
---|
559 | * Terminate the deflate instance.
|
---|
560 | */
|
---|
561 | int rc = deflateEnd(&pZip->u.Zlib);
|
---|
562 | if (rc != Z_OK)
|
---|
563 | rc = zipErrConvertFromZlib(rc, true /*fCompressing*/);
|
---|
564 | return rc;
|
---|
565 | }
|
---|
566 |
|
---|
567 |
|
---|
568 | /**
|
---|
569 | * Initializes the compressor instance.
|
---|
570 | * @returns iprt status code.
|
---|
571 | * @param pZip The compressor instance.
|
---|
572 | * @param enmLevel The desired compression level.
|
---|
573 | * @param fZlibHeader If true, write the Zlib header.
|
---|
574 | */
|
---|
575 | static DECLCALLBACK(int) rtZipZlibCompInit(PRTZIPCOMP pZip, RTZIPLEVEL enmLevel, bool fZlibHeader)
|
---|
576 | {
|
---|
577 | pZip->pfnCompress = rtZipZlibCompress;
|
---|
578 | pZip->pfnFinish = rtZipZlibCompFinish;
|
---|
579 | pZip->pfnDestroy = rtZipZlibCompDestroy;
|
---|
580 |
|
---|
581 | int iLevel = Z_DEFAULT_COMPRESSION;
|
---|
582 | switch (enmLevel)
|
---|
583 | {
|
---|
584 | case RTZIPLEVEL_STORE: iLevel = 0; break;
|
---|
585 | case RTZIPLEVEL_FAST: iLevel = 2; break;
|
---|
586 | case RTZIPLEVEL_DEFAULT: iLevel = Z_DEFAULT_COMPRESSION; break;
|
---|
587 | case RTZIPLEVEL_MAX: iLevel = 9; break;
|
---|
588 | }
|
---|
589 |
|
---|
590 | memset(&pZip->u.Zlib, 0, sizeof(pZip->u.Zlib));
|
---|
591 | pZip->u.Zlib.next_out = &pZip->abBuffer[1];
|
---|
592 | pZip->u.Zlib.avail_out = sizeof(pZip->abBuffer) - 1;
|
---|
593 | pZip->u.Zlib.opaque = pZip;
|
---|
594 |
|
---|
595 | int rc = deflateInit2(&pZip->u.Zlib, iLevel, Z_DEFLATED, fZlibHeader ? Z_DEF_WBITS : -Z_DEF_WBITS,
|
---|
596 | Z_DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
|
---|
597 | return rc >= 0 ? rc = VINF_SUCCESS : zipErrConvertFromZlib(rc, true /*fCompressing*/);
|
---|
598 | }
|
---|
599 |
|
---|
600 |
|
---|
601 | /**
|
---|
602 | * @copydoc RTZipDecompress
|
---|
603 | */
|
---|
604 | static DECLCALLBACK(int) rtZipZlibDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
---|
605 | {
|
---|
606 | pZip->u.Zlib.next_out = (Bytef *)pvBuf;
|
---|
607 | pZip->u.Zlib.avail_out = (uInt)cbBuf;
|
---|
608 | Assert(pZip->u.Zlib.avail_out == cbBuf);
|
---|
609 |
|
---|
610 | /*
|
---|
611 | * Be greedy reading input, even if no output buffer is left. It's possible
|
---|
612 | * that it's just the end of stream marker which needs to be read. Happens
|
---|
613 | * for incompressible blocks just larger than the input buffer size.
|
---|
614 | */
|
---|
615 | while (pZip->u.Zlib.avail_out > 0 || pZip->u.Zlib.avail_in <= 0)
|
---|
616 | {
|
---|
617 | /*
|
---|
618 | * Read more input?
|
---|
619 | */
|
---|
620 | if (pZip->u.Zlib.avail_in <= 0)
|
---|
621 | {
|
---|
622 | size_t cb = sizeof(pZip->abBuffer);
|
---|
623 | int rc = pZip->pfnIn(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer), &cb);
|
---|
624 | if (RT_FAILURE(rc))
|
---|
625 | return rc;
|
---|
626 | pZip->u.Zlib.avail_in = (uInt)cb; Assert(pZip->u.Zlib.avail_in == cb);
|
---|
627 | pZip->u.Zlib.next_in = &pZip->abBuffer[0];
|
---|
628 | }
|
---|
629 |
|
---|
630 | /*
|
---|
631 | * Pass it on to zlib.
|
---|
632 | */
|
---|
633 | int rc = inflate(&pZip->u.Zlib, Z_NO_FLUSH);
|
---|
634 | if (rc == Z_STREAM_END)
|
---|
635 | {
|
---|
636 | if (pcbWritten)
|
---|
637 | *pcbWritten = cbBuf - pZip->u.Zlib.avail_out;
|
---|
638 | else if (pZip->u.Zlib.avail_out > 0)
|
---|
639 | return VERR_NO_DATA;
|
---|
640 | break;
|
---|
641 | }
|
---|
642 | if (rc != Z_OK)
|
---|
643 | return zipErrConvertFromZlib(rc, false /*fCompressing*/);
|
---|
644 | }
|
---|
645 | return VINF_SUCCESS;
|
---|
646 | }
|
---|
647 |
|
---|
648 |
|
---|
649 | /**
|
---|
650 | * @copydoc RTZipDecompDestroy
|
---|
651 | */
|
---|
652 | static DECLCALLBACK(int) rtZipZlibDecompDestroy(PRTZIPDECOMP pZip)
|
---|
653 | {
|
---|
654 | /*
|
---|
655 | * Terminate the deflate instance.
|
---|
656 | */
|
---|
657 | int rc = inflateEnd(&pZip->u.Zlib);
|
---|
658 | if (rc != Z_OK)
|
---|
659 | rc = zipErrConvertFromZlib(rc, false /*fCompressing*/);
|
---|
660 | return rc;
|
---|
661 | }
|
---|
662 |
|
---|
663 |
|
---|
664 | /**
|
---|
665 | * Initialize the decompressor instance.
|
---|
666 | * @returns iprt status code.
|
---|
667 | * @param pZip The decompressor instance.
|
---|
668 | * @param fZlibHeader If true, expect the Zlib header.
|
---|
669 | */
|
---|
670 | static DECLCALLBACK(int) rtZipZlibDecompInit(PRTZIPDECOMP pZip, bool fZlibHeader)
|
---|
671 | {
|
---|
672 | pZip->pfnDecompress = rtZipZlibDecompress;
|
---|
673 | pZip->pfnDestroy = rtZipZlibDecompDestroy;
|
---|
674 |
|
---|
675 | memset(&pZip->u.Zlib, 0, sizeof(pZip->u.Zlib));
|
---|
676 | pZip->u.Zlib.opaque = pZip;
|
---|
677 |
|
---|
678 | int rc = inflateInit2(&pZip->u.Zlib, fZlibHeader ? Z_DEF_WBITS : -Z_DEF_WBITS);
|
---|
679 | return rc >= 0 ? VINF_SUCCESS : zipErrConvertFromZlib(rc, false /*fCompressing*/);
|
---|
680 | }
|
---|
681 |
|
---|
682 | #endif /* RTZIP_USE_ZLIB */
|
---|
683 |
|
---|
684 |
|
---|
685 | #ifdef RTZIP_USE_BZLIB
|
---|
686 | /**
|
---|
687 | * Convert from BZlib errno to iprt status code.
|
---|
688 | * @returns iprt status code.
|
---|
689 | * @param rc BZlib error code.
|
---|
690 | */
|
---|
691 | static int zipErrConvertFromBZlib(int rc)
|
---|
692 | {
|
---|
693 | /** @todo proper bzlib error conversion. */
|
---|
694 | switch (rc)
|
---|
695 | {
|
---|
696 | case BZ_SEQUENCE_ERROR:
|
---|
697 | AssertMsgFailed(("BZ_SEQUENCE_ERROR shall not happen!\n"));
|
---|
698 | return VERR_GENERAL_FAILURE;
|
---|
699 | case BZ_PARAM_ERROR:
|
---|
700 | return VERR_INVALID_PARAMETER;
|
---|
701 | case BZ_MEM_ERROR:
|
---|
702 | return VERR_NO_MEMORY;
|
---|
703 | case BZ_DATA_ERROR:
|
---|
704 | case BZ_DATA_ERROR_MAGIC:
|
---|
705 | case BZ_IO_ERROR:
|
---|
706 | case BZ_UNEXPECTED_EOF:
|
---|
707 | case BZ_CONFIG_ERROR:
|
---|
708 | return VERR_GENERAL_FAILURE;
|
---|
709 | case BZ_OUTBUFF_FULL:
|
---|
710 | AssertMsgFailed(("BZ_OUTBUFF_FULL shall not happen!\n"));
|
---|
711 | return VERR_GENERAL_FAILURE;
|
---|
712 | default:
|
---|
713 | if (rc >= 0)
|
---|
714 | return VINF_SUCCESS;
|
---|
715 | return VERR_GENERAL_FAILURE;
|
---|
716 | }
|
---|
717 | }
|
---|
718 |
|
---|
719 |
|
---|
720 | /**
|
---|
721 | * @copydoc RTZipCompress
|
---|
722 | */
|
---|
723 | static DECLCALLBACK(int) rtZipBZlibCompress(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf)
|
---|
724 | {
|
---|
725 | pZip->u.BZlib.next_in = (char *)pvBuf;
|
---|
726 | pZip->u.BZlib.avail_in = cbBuf;
|
---|
727 | while (pZip->u.BZlib.avail_in > 0)
|
---|
728 | {
|
---|
729 | /*
|
---|
730 | * Flush output buffer?
|
---|
731 | */
|
---|
732 | if (pZip->u.BZlib.avail_out <= 0)
|
---|
733 | {
|
---|
734 | int rc = pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer) - pZip->u.BZlib.avail_out);
|
---|
735 | if (RT_FAILURE(rc))
|
---|
736 | return rc;
|
---|
737 | pZip->u.BZlib.avail_out = sizeof(pZip->abBuffer);
|
---|
738 | pZip->u.BZlib.next_out = (char *)&pZip->abBuffer[0];
|
---|
739 | }
|
---|
740 |
|
---|
741 | /*
|
---|
742 | * Pass it on to zlib.
|
---|
743 | */
|
---|
744 | int rc = BZ2_bzCompress(&pZip->u.BZlib, BZ_RUN);
|
---|
745 | if (rc < 0 && rc != BZ_OUTBUFF_FULL)
|
---|
746 | return zipErrConvertFromBZlib(rc);
|
---|
747 | }
|
---|
748 | return VINF_SUCCESS;
|
---|
749 | }
|
---|
750 |
|
---|
751 |
|
---|
752 | /**
|
---|
753 | * @copydoc RTZipCompFinish
|
---|
754 | */
|
---|
755 | static DECLCALLBACK(int) rtZipBZlibCompFinish(PRTZIPCOMP pZip)
|
---|
756 | {
|
---|
757 | int rc = BZ_FINISH_OK;
|
---|
758 | for (;;)
|
---|
759 | {
|
---|
760 | /*
|
---|
761 | * Flush output buffer?
|
---|
762 | */
|
---|
763 | if (rc == BZ_STREAM_END || pZip->u.BZlib.avail_out <= 0)
|
---|
764 | {
|
---|
765 | int rc2 = pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer) - pZip->u.BZlib.avail_out);
|
---|
766 | if (RT_FAILURE(rc2))
|
---|
767 | return rc2;
|
---|
768 | pZip->u.BZlib.avail_out = sizeof(pZip->abBuffer);
|
---|
769 | pZip->u.BZlib.next_out = (char *)&pZip->abBuffer[0];
|
---|
770 | if (rc == BZ_STREAM_END)
|
---|
771 | return VINF_SUCCESS;
|
---|
772 | }
|
---|
773 |
|
---|
774 | /*
|
---|
775 | * Tell BZlib to finish it.
|
---|
776 | */
|
---|
777 | rc = BZ2_bzCompress(&pZip->u.BZlib, BZ_FINISH);
|
---|
778 | if (rc < 0 && rc != BZ_OUTBUFF_FULL)
|
---|
779 | return zipErrConvertFromBZlib(rc);
|
---|
780 | }
|
---|
781 | return VINF_SUCCESS;
|
---|
782 | }
|
---|
783 |
|
---|
784 |
|
---|
785 | /**
|
---|
786 | * @copydoc RTZipCompDestroy
|
---|
787 | */
|
---|
788 | static DECLCALLBACK(int) rtZipBZlibCompDestroy(PRTZIPCOMP pZip)
|
---|
789 | {
|
---|
790 | /*
|
---|
791 | * Terminate the deflate instance.
|
---|
792 | */
|
---|
793 | int rc = BZ2_bzCompressEnd(&pZip->u.BZlib);
|
---|
794 | if (rc != BZ_OK)
|
---|
795 | rc = zipErrConvertFromBZlib(rc);
|
---|
796 | return rc;
|
---|
797 | }
|
---|
798 |
|
---|
799 |
|
---|
800 | /**
|
---|
801 | * Initializes the compressor instance.
|
---|
802 | * @returns iprt status code.
|
---|
803 | * @param pZip The compressor instance.
|
---|
804 | * @param enmLevel The desired compression level.
|
---|
805 | */
|
---|
806 | static DECLCALLBACK(int) rtZipBZlibCompInit(PRTZIPCOMP pZip, RTZIPLEVEL enmLevel)
|
---|
807 | {
|
---|
808 | pZip->pfnCompress = rtZipBZlibCompress;
|
---|
809 | pZip->pfnFinish = rtZipBZlibCompFinish;
|
---|
810 | pZip->pfnDestroy = rtZipBZlibCompDestroy;
|
---|
811 |
|
---|
812 | int iSize = 6;
|
---|
813 | int iWork = 0;
|
---|
814 | switch (enmLevel)
|
---|
815 | {
|
---|
816 | case RTZIPLEVEL_STORE: iSize = 1; iWork = 2; break;
|
---|
817 | case RTZIPLEVEL_FAST: iSize = 2; iWork = 0; break;
|
---|
818 | case RTZIPLEVEL_DEFAULT: iSize = 5; iWork = 0; break;
|
---|
819 | case RTZIPLEVEL_MAX: iSize = 9; iWork = 0; break;
|
---|
820 | }
|
---|
821 |
|
---|
822 | memset(&pZip->u.BZlib, 0, sizeof(pZip->u.BZlib));
|
---|
823 | pZip->u.BZlib.next_out = (char *)&pZip->abBuffer[1];
|
---|
824 | pZip->u.BZlib.avail_out = sizeof(pZip->abBuffer) - 1;
|
---|
825 | pZip->u.BZlib.opaque = pZip;
|
---|
826 |
|
---|
827 | int rc = BZ2_bzCompressInit(&pZip->u.BZlib, iSize, 0, iWork);
|
---|
828 | return rc >= 0 ? VINF_SUCCESS : zipErrConvertFromBZlib(rc);;
|
---|
829 | }
|
---|
830 |
|
---|
831 |
|
---|
832 | /**
|
---|
833 | * @copydoc RTZipDecompress
|
---|
834 | */
|
---|
835 | static DECLCALLBACK(int) rtZipBZlibDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
---|
836 | {
|
---|
837 | pZip->u.BZlib.next_out = (char *)pvBuf;
|
---|
838 | pZip->u.BZlib.avail_out = cbBuf;
|
---|
839 | while (pZip->u.BZlib.avail_out > 0)
|
---|
840 | {
|
---|
841 | /*
|
---|
842 | * Read more output buffer?
|
---|
843 | */
|
---|
844 | if (pZip->u.BZlib.avail_in <= 0)
|
---|
845 | {
|
---|
846 | size_t cb;
|
---|
847 | int rc = pZip->pfnIn(pZip->pvUser, &pZip->abBuffer[0], sizeof(pZip->abBuffer), &cb);
|
---|
848 | if (RT_FAILURE(rc))
|
---|
849 | return rc;
|
---|
850 | pZip->u.BZlib.avail_in = cb;
|
---|
851 | pZip->u.BZlib.next_in = (char *)&pZip->abBuffer[0];
|
---|
852 | }
|
---|
853 |
|
---|
854 | /*
|
---|
855 | * Pass it on to zlib.
|
---|
856 | */
|
---|
857 | int rc = BZ2_bzDecompress(&pZip->u.BZlib);
|
---|
858 | if (rc == BZ_STREAM_END || rc == BZ_OUTBUFF_FULL)
|
---|
859 | {
|
---|
860 | if (pcbWritten)
|
---|
861 | *pcbWritten = cbBuf - pZip->u.BZlib.avail_out;
|
---|
862 | else if (pZip->u.BZlib.avail_out > 0)
|
---|
863 | return VERR_NO_DATA;
|
---|
864 | break;
|
---|
865 | }
|
---|
866 | if (rc < 0)
|
---|
867 | return zipErrConvertFromBZlib(rc);
|
---|
868 | }
|
---|
869 | return VINF_SUCCESS;
|
---|
870 | }
|
---|
871 |
|
---|
872 |
|
---|
873 | /**
|
---|
874 | * @copydoc RTZipDecompDestroy
|
---|
875 | */
|
---|
876 | static DECLCALLBACK(int) rtZipBZlibDecompDestroy(PRTZIPDECOMP pZip)
|
---|
877 | {
|
---|
878 | /*
|
---|
879 | * Terminate the deflate instance.
|
---|
880 | */
|
---|
881 | int rc = BZ2_bzDecompressEnd(&pZip->u.BZlib);
|
---|
882 | if (rc != BZ_OK)
|
---|
883 | rc = zipErrConvertFromBZlib(rc);
|
---|
884 | return rc;
|
---|
885 | }
|
---|
886 |
|
---|
887 |
|
---|
888 | /**
|
---|
889 | * Initialize the decompressor instance.
|
---|
890 | * @returns iprt status code.
|
---|
891 | * @param pZip The decompressor instance.
|
---|
892 | */
|
---|
893 | static DECLCALLBACK(int) rtZipBZlibDecompInit(PRTZIPDECOMP pZip)
|
---|
894 | {
|
---|
895 | pZip->pfnDecompress = rtZipBZlibDecompress;
|
---|
896 | pZip->pfnDestroy = rtZipBZlibDecompDestroy;
|
---|
897 |
|
---|
898 | memset(&pZip->u.BZlib, 0, sizeof(pZip->u.BZlib));
|
---|
899 | pZip->u.BZlib.opaque = pZip;
|
---|
900 |
|
---|
901 | int rc = BZ2_bzDecompressInit(&pZip->u.BZlib, 0, 0);
|
---|
902 | return rc >= 0 ? VINF_SUCCESS : zipErrConvertFromBZlib(rc);
|
---|
903 | }
|
---|
904 |
|
---|
905 | #endif /* RTZIP_USE_BZLIB */
|
---|
906 |
|
---|
907 |
|
---|
908 | #ifdef RTZIP_USE_LZF
|
---|
909 |
|
---|
910 | /**
|
---|
911 | * Flushes the output buffer.
|
---|
912 | * @returns iprt status code.
|
---|
913 | * @param pZip The compressor instance.
|
---|
914 | */
|
---|
915 | static int rtZipLZFCompFlushOutput(PRTZIPCOMP pZip)
|
---|
916 | {
|
---|
917 | size_t cb = pZip->u.LZF.pbOutput - &pZip->abBuffer[0];
|
---|
918 | pZip->u.LZF.pbOutput = &pZip->abBuffer[0];
|
---|
919 | return pZip->pfnOut(pZip->pvUser, &pZip->abBuffer[0], cb);
|
---|
920 | }
|
---|
921 |
|
---|
922 |
|
---|
923 | /**
|
---|
924 | * Compresses a buffer using LZF.
|
---|
925 | *
|
---|
926 | * @returns VBox status code.
|
---|
927 | * @param pZip The compressor instance.
|
---|
928 | * @param pbBuf What to compress.
|
---|
929 | * @param cbBuf How much to compress.
|
---|
930 | */
|
---|
931 | static int rtZipLZFCompressBuffer(PRTZIPCOMP pZip, const uint8_t *pbBuf, size_t cbBuf)
|
---|
932 | {
|
---|
933 | bool fForceFlush = false;
|
---|
934 | while (cbBuf > 0)
|
---|
935 | {
|
---|
936 | /*
|
---|
937 | * Flush output buffer?
|
---|
938 | */
|
---|
939 | unsigned cbFree = (unsigned)(sizeof(pZip->abBuffer) - (pZip->u.LZF.pbOutput - &pZip->abBuffer[0]));
|
---|
940 | if ( fForceFlush
|
---|
941 | || cbFree < RTZIPLZF_MAX_DATA_SIZE + sizeof(RTZIPLZFHDR))
|
---|
942 | {
|
---|
943 | int rc = rtZipLZFCompFlushOutput(pZip);
|
---|
944 | if (RT_FAILURE(rc))
|
---|
945 | return rc;
|
---|
946 | fForceFlush = false;
|
---|
947 | cbFree = sizeof(pZip->abBuffer);
|
---|
948 | }
|
---|
949 |
|
---|
950 | /*
|
---|
951 | * Setup the block header.
|
---|
952 | */
|
---|
953 | PRTZIPLZFHDR pHdr = (PRTZIPLZFHDR)pZip->u.LZF.pbOutput; /* warning: This might be unaligned! */
|
---|
954 | pHdr->u16Magic = RTZIPLZFHDR_MAGIC;
|
---|
955 | pHdr->cbData = 0;
|
---|
956 | pHdr->u32CRC = 0;
|
---|
957 | pHdr->cbUncompressed = 0;
|
---|
958 | cbFree -= sizeof(*pHdr);
|
---|
959 | pZip->u.LZF.pbOutput += sizeof(*pHdr);
|
---|
960 |
|
---|
961 | /*
|
---|
962 | * Compress data for the block.
|
---|
963 | *
|
---|
964 | * We try compress as much as we have freespace for at first,
|
---|
965 | * but if it turns out the compression is inefficient, we'll
|
---|
966 | * reduce the size of data we try compress till it fits the
|
---|
967 | * output space.
|
---|
968 | */
|
---|
969 | cbFree = RT_MIN(cbFree, RTZIPLZF_MAX_DATA_SIZE);
|
---|
970 | unsigned cbInput = (unsigned)RT_MIN(RTZIPLZF_MAX_UNCOMPRESSED_DATA_SIZE, cbBuf);
|
---|
971 | unsigned cbOutput = lzf_compress(pbBuf, cbInput, pZip->u.LZF.pbOutput, cbFree);
|
---|
972 | if (!cbOutput)
|
---|
973 | {
|
---|
974 | /** @todo add an alternative method which stores the raw data if bad compression. */
|
---|
975 | do
|
---|
976 | {
|
---|
977 | cbInput /= 2;
|
---|
978 | if (!cbInput)
|
---|
979 | {
|
---|
980 | AssertMsgFailed(("lzf_compress bug! cbFree=%zu\n", cbFree));
|
---|
981 | return VERR_INTERNAL_ERROR;
|
---|
982 | }
|
---|
983 | cbOutput = lzf_compress(pbBuf, cbInput, pZip->u.LZF.pbOutput, cbFree);
|
---|
984 | } while (!cbOutput);
|
---|
985 | fForceFlush = true;
|
---|
986 | }
|
---|
987 |
|
---|
988 | /*
|
---|
989 | * Update the header and advance the input buffer.
|
---|
990 | */
|
---|
991 | pHdr->cbData = cbOutput;
|
---|
992 | //pHdr->u32CRC = RTCrc32(pbBuf, cbInput); - too slow
|
---|
993 | pHdr->cbUncompressed = cbInput;
|
---|
994 |
|
---|
995 | pZip->u.LZF.pbOutput += cbOutput;
|
---|
996 | cbBuf -= cbInput;
|
---|
997 | pbBuf += cbInput;
|
---|
998 | }
|
---|
999 | return VINF_SUCCESS;
|
---|
1000 | }
|
---|
1001 |
|
---|
1002 |
|
---|
1003 | /**
|
---|
1004 | * Flushes the input buffer.
|
---|
1005 | * @returns iprt status code.
|
---|
1006 | * @param pZip The compressor instance.
|
---|
1007 | */
|
---|
1008 | static int rtZipLZFCompFlushInput(PRTZIPCOMP pZip)
|
---|
1009 | {
|
---|
1010 | size_t cb = pZip->u.LZF.pbInput - &pZip->u.LZF.abInput[0];
|
---|
1011 | pZip->u.LZF.pbInput = &pZip->u.LZF.abInput[0];
|
---|
1012 | pZip->u.LZF.cbInputFree = sizeof(pZip->u.LZF.abInput);
|
---|
1013 | if (cb)
|
---|
1014 | return rtZipLZFCompressBuffer(pZip, pZip->u.LZF.abInput, cb);
|
---|
1015 | return VINF_SUCCESS;
|
---|
1016 | }
|
---|
1017 |
|
---|
1018 |
|
---|
1019 | /**
|
---|
1020 | * @copydoc RTZipCompress
|
---|
1021 | */
|
---|
1022 | static DECLCALLBACK(int) rtZipLZFCompress(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf)
|
---|
1023 | {
|
---|
1024 | #define RTZIPLZF_SMALL_CHUNK (128)
|
---|
1025 |
|
---|
1026 | /*
|
---|
1027 | * Flush the input buffer if necessary.
|
---|
1028 | */
|
---|
1029 | if ( ( cbBuf <= RTZIPLZF_SMALL_CHUNK
|
---|
1030 | && cbBuf > pZip->u.LZF.cbInputFree)
|
---|
1031 | || ( cbBuf > RTZIPLZF_SMALL_CHUNK
|
---|
1032 | && pZip->u.LZF.cbInputFree != sizeof(pZip->u.LZF.abInput))
|
---|
1033 | )
|
---|
1034 | {
|
---|
1035 | int rc = rtZipLZFCompFlushInput(pZip);
|
---|
1036 | if (RT_FAILURE(rc))
|
---|
1037 | return rc;
|
---|
1038 | }
|
---|
1039 |
|
---|
1040 | /*
|
---|
1041 | * If it's a relativly small block put it in the input buffer, elsewise
|
---|
1042 | * compress directly it.
|
---|
1043 | */
|
---|
1044 | if (cbBuf <= RTZIPLZF_SMALL_CHUNK)
|
---|
1045 | {
|
---|
1046 | Assert(pZip->u.LZF.cbInputFree >= cbBuf);
|
---|
1047 | memcpy(pZip->u.LZF.pbInput, pvBuf, cbBuf);
|
---|
1048 | pZip->u.LZF.pbInput += cbBuf;
|
---|
1049 | pZip->u.LZF.cbInputFree -= cbBuf;
|
---|
1050 | }
|
---|
1051 | else
|
---|
1052 | {
|
---|
1053 | Assert(pZip->u.LZF.cbInputFree == sizeof(pZip->u.LZF.abInput));
|
---|
1054 | int rc = rtZipLZFCompressBuffer(pZip, (const uint8_t *)pvBuf, cbBuf);
|
---|
1055 | if (RT_FAILURE(rc))
|
---|
1056 | return rc;
|
---|
1057 | }
|
---|
1058 | return VINF_SUCCESS;
|
---|
1059 | }
|
---|
1060 |
|
---|
1061 |
|
---|
1062 | /**
|
---|
1063 | * @copydoc RTZipCompFinish
|
---|
1064 | */
|
---|
1065 | static DECLCALLBACK(int) rtZipLZFCompFinish(PRTZIPCOMP pZip)
|
---|
1066 | {
|
---|
1067 | int rc = rtZipLZFCompFlushInput(pZip);
|
---|
1068 | if (RT_SUCCESS(rc))
|
---|
1069 | rc = rtZipLZFCompFlushOutput(pZip);
|
---|
1070 | return rc;
|
---|
1071 | }
|
---|
1072 |
|
---|
1073 |
|
---|
1074 | /**
|
---|
1075 | * @copydoc RTZipCompDestroy
|
---|
1076 | */
|
---|
1077 | static DECLCALLBACK(int) rtZipLZFCompDestroy(PRTZIPCOMP pZip)
|
---|
1078 | {
|
---|
1079 | NOREF(pZip);
|
---|
1080 | return VINF_SUCCESS;
|
---|
1081 | }
|
---|
1082 |
|
---|
1083 |
|
---|
1084 | /**
|
---|
1085 | * Initializes the compressor instance.
|
---|
1086 | * @returns iprt status code.
|
---|
1087 | * @param pZip The compressor instance.
|
---|
1088 | * @param enmLevel The desired compression level.
|
---|
1089 | */
|
---|
1090 | static DECLCALLBACK(int) rtZipLZFCompInit(PRTZIPCOMP pZip, RTZIPLEVEL enmLevel)
|
---|
1091 | {
|
---|
1092 | NOREF(enmLevel);
|
---|
1093 | pZip->pfnCompress = rtZipLZFCompress;
|
---|
1094 | pZip->pfnFinish = rtZipLZFCompFinish;
|
---|
1095 | pZip->pfnDestroy = rtZipLZFCompDestroy;
|
---|
1096 |
|
---|
1097 | pZip->u.LZF.pbOutput = &pZip->abBuffer[1];
|
---|
1098 | pZip->u.LZF.pbInput = &pZip->u.LZF.abInput[0];
|
---|
1099 | pZip->u.LZF.cbInputFree = sizeof(pZip->u.LZF.abInput);
|
---|
1100 | return VINF_SUCCESS;
|
---|
1101 | }
|
---|
1102 |
|
---|
1103 |
|
---|
1104 | /**
|
---|
1105 | * This will validate a header and to all the necessary bitching if it's invalid.
|
---|
1106 | * @returns true if valid.
|
---|
1107 | * @returns false if invalid.
|
---|
1108 | * @param pHdr Pointer to the header.\
|
---|
1109 | */
|
---|
1110 | static bool rtZipLZFValidHeader(PCRTZIPLZFHDR pHdr)
|
---|
1111 | {
|
---|
1112 | if ( pHdr->u16Magic != RTZIPLZFHDR_MAGIC
|
---|
1113 | || !pHdr->cbData
|
---|
1114 | || pHdr->cbData > RTZIPLZF_MAX_DATA_SIZE
|
---|
1115 | || !pHdr->cbUncompressed
|
---|
1116 | || pHdr->cbUncompressed > RTZIPLZF_MAX_UNCOMPRESSED_DATA_SIZE
|
---|
1117 | )
|
---|
1118 | {
|
---|
1119 | AssertMsgFailed(("Invalid LZF header! %.*Rhxs\n", sizeof(*pHdr), pHdr));
|
---|
1120 | return false;
|
---|
1121 | }
|
---|
1122 | return true;
|
---|
1123 | }
|
---|
1124 |
|
---|
1125 |
|
---|
1126 | /**
|
---|
1127 | * @copydoc RTZipDecompress
|
---|
1128 | */
|
---|
1129 | static DECLCALLBACK(int) rtZipLZFDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
---|
1130 | {
|
---|
1131 | /*
|
---|
1132 | * Decompression loop.
|
---|
1133 | *
|
---|
1134 | * This a bit ugly because we have to deal with reading block...
|
---|
1135 | * To simplify matters we've put a max block size and will never
|
---|
1136 | * fill the input buffer with more than allows us to complete
|
---|
1137 | * any partially read blocks.
|
---|
1138 | *
|
---|
1139 | * When possible we decompress directly to the user buffer, when
|
---|
1140 | * not possible we'll use the spill buffer.
|
---|
1141 | */
|
---|
1142 | # ifdef RTZIP_LZF_BLOCK_BY_BLOCK
|
---|
1143 | size_t cbWritten = 0;
|
---|
1144 | while (cbBuf > 0)
|
---|
1145 | {
|
---|
1146 | /*
|
---|
1147 | * Anything in the spill buffer?
|
---|
1148 | */
|
---|
1149 | if (pZip->u.LZF.cbSpill > 0)
|
---|
1150 | {
|
---|
1151 | unsigned cb = (unsigned)RT_MIN(pZip->u.LZF.cbSpill, cbBuf);
|
---|
1152 | memcpy(pvBuf, pZip->u.LZF.pbSpill, cb);
|
---|
1153 | pZip->u.LZF.pbSpill += cb;
|
---|
1154 | pZip->u.LZF.cbSpill -= cb;
|
---|
1155 | cbWritten += cb;
|
---|
1156 | cbBuf -= cb;
|
---|
1157 | if (!cbBuf)
|
---|
1158 | break;
|
---|
1159 | pvBuf = (uint8_t *)pvBuf + cb;
|
---|
1160 | }
|
---|
1161 |
|
---|
1162 | /*
|
---|
1163 | * We always read and work one block at a time.
|
---|
1164 | */
|
---|
1165 | RTZIPLZFHDR Hdr;
|
---|
1166 | int rc = pZip->pfnIn(pZip->pvUser, &Hdr, sizeof(Hdr), NULL);
|
---|
1167 | if (RT_FAILURE(rc))
|
---|
1168 | return rc;
|
---|
1169 | if (!rtZipLZFValidHeader(&Hdr))
|
---|
1170 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1171 | if (Hdr.cbData > 0)
|
---|
1172 | {
|
---|
1173 | rc = pZip->pfnIn(pZip->pvUser, &pZip->abBuffer[0], Hdr.cbData, NULL);
|
---|
1174 | if (RT_FAILURE(rc))
|
---|
1175 | return rc;
|
---|
1176 | }
|
---|
1177 |
|
---|
1178 | /*
|
---|
1179 | * Does the uncompressed data fit into the supplied buffer?
|
---|
1180 | * If so we uncompress it directly into the user buffer, else we'll have to use the spill buffer.
|
---|
1181 | */
|
---|
1182 | unsigned cbUncompressed = Hdr.cbUncompressed;
|
---|
1183 | if (cbUncompressed <= cbBuf)
|
---|
1184 | {
|
---|
1185 | unsigned cbOutput = lzf_decompress(&pZip->abBuffer[0], Hdr.cbData, pvBuf, cbUncompressed);
|
---|
1186 | if (cbOutput != cbUncompressed)
|
---|
1187 | {
|
---|
1188 | # ifndef IPRT_NO_CRT /* no errno */
|
---|
1189 | AssertMsgFailed(("Decompression error, errno=%d. cbOutput=%#x cbUncompressed=%#x\n",
|
---|
1190 | errno, cbOutput, cbUncompressed));
|
---|
1191 | # endif
|
---|
1192 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1193 | }
|
---|
1194 | cbBuf -= cbUncompressed;
|
---|
1195 | pvBuf = (uint8_t *)pvBuf + cbUncompressed;
|
---|
1196 | cbWritten += cbUncompressed;
|
---|
1197 | }
|
---|
1198 | else
|
---|
1199 | {
|
---|
1200 | unsigned cbOutput = lzf_decompress(&pZip->abBuffer[0], Hdr.cbData, pZip->u.LZF.abSpill, cbUncompressed);
|
---|
1201 | if (cbOutput != cbUncompressed)
|
---|
1202 | {
|
---|
1203 | # ifndef IPRT_NO_CRT /* no errno */
|
---|
1204 | AssertMsgFailed(("Decompression error, errno=%d. cbOutput=%#x cbUncompressed=%#x\n",
|
---|
1205 | errno, cbOutput, cbUncompressed));
|
---|
1206 | # endif
|
---|
1207 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1208 | }
|
---|
1209 | pZip->u.LZF.pbSpill = &pZip->u.LZF.abSpill[0];
|
---|
1210 | pZip->u.LZF.cbSpill = cbUncompressed;
|
---|
1211 | }
|
---|
1212 | }
|
---|
1213 |
|
---|
1214 | if (pcbWritten)
|
---|
1215 | *pcbWritten = cbWritten;
|
---|
1216 | # else /* !RTZIP_LZF_BLOCK_BY_BLOCK */
|
---|
1217 | while (cbBuf > 0)
|
---|
1218 | {
|
---|
1219 | /*
|
---|
1220 | * Anything in the spill buffer?
|
---|
1221 | */
|
---|
1222 | if (pZip->u.LZF.cbSpill > 0)
|
---|
1223 | {
|
---|
1224 | unsigned cb = (unsigned)RT_MIN(pZip->u.LZF.cbSpill, cbBuf);
|
---|
1225 | memcpy(pvBuf, pZip->u.LZF.pbSpill, cb);
|
---|
1226 | pZip->u.LZF.pbSpill += cb;
|
---|
1227 | pZip->u.LZF.cbSpill -= cb;
|
---|
1228 | cbBuf -= cb;
|
---|
1229 | if (pcbWritten)
|
---|
1230 | *pcbWritten = cb;
|
---|
1231 | if (!cbBuf)
|
---|
1232 | break;
|
---|
1233 | pvBuf = (uint8_t *)pvBuf + cb;
|
---|
1234 | }
|
---|
1235 |
|
---|
1236 | /*
|
---|
1237 | * Incomplete header or nothing at all.
|
---|
1238 | */
|
---|
1239 | PCRTZIPLZFHDR pHdr;
|
---|
1240 | if (pZip->u.LZF.cbInput < sizeof(RTZIPLZFHDR))
|
---|
1241 | {
|
---|
1242 | if (pZip->u.LZF.cbInput <= 0)
|
---|
1243 | {
|
---|
1244 | /* empty, fill the buffer. */
|
---|
1245 | size_t cb = 0;
|
---|
1246 | int rc = pZip->pfnIn(pZip->pvUser, &pZip->abBuffer[0],
|
---|
1247 | sizeof(pZip->abBuffer) - RTZIPLZF_MAX_DATA_SIZE, &cb);
|
---|
1248 | if (RT_FAILURE(rc))
|
---|
1249 | return rc;
|
---|
1250 | pZip->u.LZF.pbInput = &pZip->abBuffer[0];
|
---|
1251 | pZip->u.LZF.cbInput = cb;
|
---|
1252 | pHdr = (PCRTZIPLZFHDR)pZip->u.LZF.pbInput;
|
---|
1253 | }
|
---|
1254 | else
|
---|
1255 | {
|
---|
1256 | /* move the header up and fill the buffer. */
|
---|
1257 | size_t cbCur = pZip->u.LZF.cbInput;
|
---|
1258 | memmove(&pZip->abBuffer[0], pZip->u.LZF.pbInput, cbCur);
|
---|
1259 | pZip->u.LZF.pbInput = &pZip->abBuffer[0];
|
---|
1260 |
|
---|
1261 | size_t cb = 0;
|
---|
1262 | int rc = pZip->pfnIn(pZip->pvUser, &pZip->abBuffer[cbCur],
|
---|
1263 | sizeof(pZip->abBuffer) - RTZIPLZF_MAX_DATA_SIZE - cbCur, &cb);
|
---|
1264 | if (RT_FAILURE(rc))
|
---|
1265 | return rc;
|
---|
1266 | pHdr = (PCRTZIPLZFHDR)pZip->u.LZF.pbInput;
|
---|
1267 | pZip->u.LZF.cbInput += cb;
|
---|
1268 | }
|
---|
1269 |
|
---|
1270 | /*
|
---|
1271 | * Validate the header.
|
---|
1272 | */
|
---|
1273 | if (!rtZipLZFValidHeader(pHdr))
|
---|
1274 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1275 | }
|
---|
1276 | else
|
---|
1277 | {
|
---|
1278 | /*
|
---|
1279 | * Validate the header and check if it's an incomplete block.
|
---|
1280 | */
|
---|
1281 | pHdr = (PCRTZIPLZFHDR)pZip->u.LZF.pbInput;
|
---|
1282 | if (!rtZipLZFValidHeader(pHdr))
|
---|
1283 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1284 |
|
---|
1285 | if (pHdr->cbData > pZip->u.LZF.cbInput - sizeof(*pHdr))
|
---|
1286 | {
|
---|
1287 | /* read the remainder of the block. */
|
---|
1288 | size_t cbToRead = pHdr->cbData - (pZip->u.LZF.cbInput - sizeof(*pHdr));
|
---|
1289 | Assert(&pZip->u.LZF.pbInput[pZip->u.LZF.cbInput + cbToRead] <= &pZip->u.LZF.pbInput[sizeof(pZip->abBuffer)]);
|
---|
1290 | int rc = pZip->pfnIn(pZip->pvUser, &pZip->u.LZF.pbInput[pZip->u.LZF.cbInput],
|
---|
1291 | cbToRead, NULL);
|
---|
1292 | if (RT_FAILURE(rc))
|
---|
1293 | return rc;
|
---|
1294 | pZip->u.LZF.cbInput += cbToRead;
|
---|
1295 | }
|
---|
1296 | }
|
---|
1297 | AssertMsgReturn(sizeof(*pHdr) + pHdr->cbData <= pZip->u.LZF.cbInput,
|
---|
1298 | ("cbData=%#x cbInput=%#x\n", pHdr->cbData, pZip->u.LZF.cbInput),
|
---|
1299 | VERR_GENERAL_FAILURE); /** @todo Get better error codes for RTZip! */
|
---|
1300 |
|
---|
1301 | /*
|
---|
1302 | * Does the uncompressed data fit into the supplied buffer?
|
---|
1303 | * If so we uncompress it directly into the user buffer, else we'll have to use the spill buffer.
|
---|
1304 | */
|
---|
1305 | unsigned cbUncompressed = pHdr->cbUncompressed;
|
---|
1306 | if (cbUncompressed <= cbBuf)
|
---|
1307 | {
|
---|
1308 | unsigned cbOutput = lzf_decompress(pHdr + 1, pHdr->cbData, pvBuf, cbUncompressed);
|
---|
1309 | if (cbOutput != cbUncompressed)
|
---|
1310 | {
|
---|
1311 | AssertMsgFailed(("Decompression error, errno=%d. cbOutput=%#x cbUncompressed=%#x\n",
|
---|
1312 | errno, cbOutput, cbUncompressed));
|
---|
1313 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1314 | }
|
---|
1315 | cbBuf -= cbUncompressed;
|
---|
1316 | pvBuf = (uint8_t *)pvBuf + cbUncompressed;
|
---|
1317 | }
|
---|
1318 | else
|
---|
1319 | {
|
---|
1320 | unsigned cbOutput = lzf_decompress(pHdr + 1, pHdr->cbData, pZip->u.LZF.abSpill, cbUncompressed);
|
---|
1321 | if (cbOutput != cbUncompressed)
|
---|
1322 | {
|
---|
1323 | AssertMsgFailed(("Decompression error, errno=%d. cbOutput=%#x cbUncompressed=%#x\n",
|
---|
1324 | errno, cbOutput, cbUncompressed));
|
---|
1325 | return VERR_GENERAL_FAILURE; /** @todo Get better error codes for RTZip! */
|
---|
1326 | }
|
---|
1327 | pZip->u.LZF.pbSpill = &pZip->u.LZF.abSpill[0];
|
---|
1328 | pZip->u.LZF.cbSpill = cbUncompressed;
|
---|
1329 | }
|
---|
1330 |
|
---|
1331 | /* advance the input buffer */
|
---|
1332 | pZip->u.LZF.cbInput -= pHdr->cbData + sizeof(*pHdr);
|
---|
1333 | pZip->u.LZF.pbInput += pHdr->cbData + sizeof(*pHdr);
|
---|
1334 | if (pcbWritten)
|
---|
1335 | *pcbWritten += cbUncompressed;
|
---|
1336 | }
|
---|
1337 | # endif /* !RTZIP_LZF_BLOCK_BY_BLOCK */
|
---|
1338 | return VINF_SUCCESS;
|
---|
1339 | }
|
---|
1340 |
|
---|
1341 |
|
---|
1342 | /**
|
---|
1343 | * @copydoc RTZipDecompDestroy
|
---|
1344 | */
|
---|
1345 | static DECLCALLBACK(int) rtZipLZFDecompDestroy(PRTZIPDECOMP pZip)
|
---|
1346 | {
|
---|
1347 | NOREF(pZip);
|
---|
1348 | return VINF_SUCCESS;
|
---|
1349 | }
|
---|
1350 |
|
---|
1351 |
|
---|
1352 | /**
|
---|
1353 | * Initialize the decompressor instance.
|
---|
1354 | * @returns iprt status code.
|
---|
1355 | * @param pZip The decompressor instance.
|
---|
1356 | */
|
---|
1357 | static DECLCALLBACK(int) rtZipLZFDecompInit(PRTZIPDECOMP pZip)
|
---|
1358 | {
|
---|
1359 | pZip->pfnDecompress = rtZipLZFDecompress;
|
---|
1360 | pZip->pfnDestroy = rtZipLZFDecompDestroy;
|
---|
1361 |
|
---|
1362 | # ifndef RTZIP_LZF_BLOCK_BY_BLOCK
|
---|
1363 | pZip->u.LZF.pbInput = NULL;
|
---|
1364 | pZip->u.LZF.cbInput = 0;
|
---|
1365 | # endif
|
---|
1366 | pZip->u.LZF.cbSpill = 0;
|
---|
1367 | pZip->u.LZF.pbSpill = NULL;
|
---|
1368 |
|
---|
1369 | return VINF_SUCCESS;
|
---|
1370 | }
|
---|
1371 |
|
---|
1372 | #endif /* RTZIP_USE_LZF */
|
---|
1373 |
|
---|
1374 |
|
---|
1375 | /**
|
---|
1376 | * Create a compressor instance.
|
---|
1377 | *
|
---|
1378 | * @returns iprt status code.
|
---|
1379 | * @param ppZip Where to store the instance handle.
|
---|
1380 | * @param pvUser User argument which will be passed on to pfnOut and pfnIn.
|
---|
1381 | * @param pfnOut Callback for consuming output of compression.
|
---|
1382 | * @param enmType Type of compressor to create.
|
---|
1383 | * @param enmLevel Compression level.
|
---|
1384 | */
|
---|
1385 | RTDECL(int) RTZipCompCreate(PRTZIPCOMP *ppZip, void *pvUser, PFNRTZIPOUT pfnOut, RTZIPTYPE enmType, RTZIPLEVEL enmLevel)
|
---|
1386 | {
|
---|
1387 | /*
|
---|
1388 | * Validate input.
|
---|
1389 | */
|
---|
1390 | AssertReturn(enmType >= RTZIPTYPE_INVALID && enmType < RTZIPTYPE_END, VERR_INVALID_PARAMETER);
|
---|
1391 | AssertReturn(enmLevel >= RTZIPLEVEL_STORE && enmLevel <= RTZIPLEVEL_MAX, VERR_INVALID_PARAMETER);
|
---|
1392 | AssertPtrReturn(pfnOut, VERR_INVALID_POINTER);
|
---|
1393 | AssertPtrReturn(ppZip, VERR_INVALID_POINTER);
|
---|
1394 |
|
---|
1395 | /*
|
---|
1396 | * Allocate memory for the instance data.
|
---|
1397 | */
|
---|
1398 | PRTZIPCOMP pZip = (PRTZIPCOMP)RTMemAlloc(sizeof(RTZIPCOMP));
|
---|
1399 | if (!pZip)
|
---|
1400 | return VERR_NO_MEMORY;
|
---|
1401 |
|
---|
1402 | /*
|
---|
1403 | * Determine auto type.
|
---|
1404 | */
|
---|
1405 | if (enmType == RTZIPTYPE_AUTO)
|
---|
1406 | {
|
---|
1407 | if (enmLevel == RTZIPLEVEL_STORE)
|
---|
1408 | enmType = RTZIPTYPE_STORE;
|
---|
1409 | else
|
---|
1410 | {
|
---|
1411 | #if defined(RTZIP_USE_ZLIB) && defined(RTZIP_USE_BZLIB)
|
---|
1412 | if (enmLevel == RTZIPLEVEL_MAX)
|
---|
1413 | enmType = RTZIPTYPE_BZLIB;
|
---|
1414 | else
|
---|
1415 | enmType = RTZIPTYPE_ZLIB;
|
---|
1416 | #elif defined(RTZIP_USE_ZLIB)
|
---|
1417 | enmType = RTZIPTYPE_ZLIB;
|
---|
1418 | #elif defined(RTZIP_USE_BZLIB)
|
---|
1419 | enmType = RTZIPTYPE_BZLIB;
|
---|
1420 | #else
|
---|
1421 | enmType = RTZIPTYPE_STORE;
|
---|
1422 | #endif
|
---|
1423 | }
|
---|
1424 | }
|
---|
1425 |
|
---|
1426 | /*
|
---|
1427 | * Init instance.
|
---|
1428 | */
|
---|
1429 | pZip->pfnOut = pfnOut;
|
---|
1430 | pZip->enmType = enmType;
|
---|
1431 | pZip->pvUser = pvUser;
|
---|
1432 | pZip->abBuffer[0] = enmType; /* first byte is the compression type. */
|
---|
1433 | int rc = VERR_NOT_IMPLEMENTED;
|
---|
1434 | switch (enmType)
|
---|
1435 | {
|
---|
1436 | case RTZIPTYPE_STORE:
|
---|
1437 | #ifdef RTZIP_USE_STORE
|
---|
1438 | rc = rtZipStoreCompInit(pZip, enmLevel);
|
---|
1439 | #endif
|
---|
1440 | break;
|
---|
1441 |
|
---|
1442 | case RTZIPTYPE_ZLIB:
|
---|
1443 | case RTZIPTYPE_ZLIB_NO_HEADER:
|
---|
1444 | #ifdef RTZIP_USE_ZLIB
|
---|
1445 | rc = rtZipZlibCompInit(pZip, enmLevel, enmType == RTZIPTYPE_ZLIB /*fZlibHeader*/);
|
---|
1446 | #endif
|
---|
1447 | break;
|
---|
1448 |
|
---|
1449 | case RTZIPTYPE_BZLIB:
|
---|
1450 | #ifdef RTZIP_USE_BZLIB
|
---|
1451 | rc = rtZipBZlibCompInit(pZip, enmLevel);
|
---|
1452 | #endif
|
---|
1453 | break;
|
---|
1454 |
|
---|
1455 | case RTZIPTYPE_LZF:
|
---|
1456 | #ifdef RTZIP_USE_LZF
|
---|
1457 | rc = rtZipLZFCompInit(pZip, enmLevel);
|
---|
1458 | #endif
|
---|
1459 | break;
|
---|
1460 |
|
---|
1461 | case RTZIPTYPE_LZJB:
|
---|
1462 | case RTZIPTYPE_LZO:
|
---|
1463 | break;
|
---|
1464 |
|
---|
1465 | default:
|
---|
1466 | AssertFailedBreak();
|
---|
1467 | }
|
---|
1468 |
|
---|
1469 | if (RT_SUCCESS(rc))
|
---|
1470 | *ppZip = pZip;
|
---|
1471 | else
|
---|
1472 | RTMemFree(pZip);
|
---|
1473 | return rc;
|
---|
1474 | }
|
---|
1475 | RT_EXPORT_SYMBOL(RTZipCompCreate);
|
---|
1476 |
|
---|
1477 |
|
---|
1478 | /**
|
---|
1479 | * Compresses a chunk of memory.
|
---|
1480 | *
|
---|
1481 | * @returns iprt status code.
|
---|
1482 | * @param pZip The compressor instance.
|
---|
1483 | * @param pvBuf Pointer to buffer containing the bits to compress.
|
---|
1484 | * @param cbBuf Number of bytes to compress.
|
---|
1485 | */
|
---|
1486 | RTDECL(int) RTZipCompress(PRTZIPCOMP pZip, const void *pvBuf, size_t cbBuf)
|
---|
1487 | {
|
---|
1488 | if (!cbBuf)
|
---|
1489 | return VINF_SUCCESS;
|
---|
1490 | return pZip->pfnCompress(pZip, pvBuf, cbBuf);
|
---|
1491 | }
|
---|
1492 | RT_EXPORT_SYMBOL(RTZipCompress);
|
---|
1493 |
|
---|
1494 |
|
---|
1495 | /**
|
---|
1496 | * Finishes the compression.
|
---|
1497 | * This will flush all data and terminate the compression data stream.
|
---|
1498 | *
|
---|
1499 | * @returns iprt status code.
|
---|
1500 | * @param pZip The compressor instance.
|
---|
1501 | */
|
---|
1502 | RTDECL(int) RTZipCompFinish(PRTZIPCOMP pZip)
|
---|
1503 | {
|
---|
1504 | return pZip->pfnFinish(pZip);
|
---|
1505 | }
|
---|
1506 | RT_EXPORT_SYMBOL(RTZipCompFinish);
|
---|
1507 |
|
---|
1508 |
|
---|
1509 | /**
|
---|
1510 | * Destroys the compressor instance.
|
---|
1511 | *
|
---|
1512 | * @returns iprt status code.
|
---|
1513 | * @param pZip The compressor instance.
|
---|
1514 | */
|
---|
1515 | RTDECL(int) RTZipCompDestroy(PRTZIPCOMP pZip)
|
---|
1516 | {
|
---|
1517 | /*
|
---|
1518 | * Compressor specific destruction attempt first.
|
---|
1519 | */
|
---|
1520 | int rc = pZip->pfnDestroy(pZip);
|
---|
1521 | AssertRCReturn(rc, rc);
|
---|
1522 |
|
---|
1523 | /*
|
---|
1524 | * Free the instance memory.
|
---|
1525 | */
|
---|
1526 | pZip->enmType = RTZIPTYPE_INVALID;
|
---|
1527 | RTMemFree(pZip);
|
---|
1528 | return VINF_SUCCESS;
|
---|
1529 | }
|
---|
1530 | RT_EXPORT_SYMBOL(RTZipCompDestroy);
|
---|
1531 |
|
---|
1532 |
|
---|
1533 | /**
|
---|
1534 | * @copydoc RTZipDecompress
|
---|
1535 | */
|
---|
1536 | static DECLCALLBACK(int) rtZipStubDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
---|
1537 | {
|
---|
1538 | NOREF(pZip); NOREF(pvBuf); NOREF(cbBuf); NOREF(pcbWritten);
|
---|
1539 | return VERR_NOT_SUPPORTED;
|
---|
1540 | }
|
---|
1541 |
|
---|
1542 |
|
---|
1543 | /**
|
---|
1544 | * @copydoc RTZipDecompDestroy
|
---|
1545 | */
|
---|
1546 | static DECLCALLBACK(int) rtZipStubDecompDestroy(PRTZIPDECOMP pZip)
|
---|
1547 | {
|
---|
1548 | NOREF(pZip);
|
---|
1549 | return VINF_SUCCESS;
|
---|
1550 | }
|
---|
1551 |
|
---|
1552 |
|
---|
1553 | /**
|
---|
1554 | * Create a decompressor instance.
|
---|
1555 | *
|
---|
1556 | * @returns iprt status code.
|
---|
1557 | * @param ppZip Where to store the instance handle.
|
---|
1558 | * @param pvUser User argument which will be passed on to pfnOut and pfnIn.
|
---|
1559 | * @param pfnIn Callback for producing input for decompression.
|
---|
1560 | */
|
---|
1561 | RTDECL(int) RTZipDecompCreate(PRTZIPDECOMP *ppZip, void *pvUser, PFNRTZIPIN pfnIn)
|
---|
1562 | {
|
---|
1563 | /*
|
---|
1564 | * Validate input.
|
---|
1565 | */
|
---|
1566 | AssertPtrReturn(pfnIn, VERR_INVALID_POINTER);
|
---|
1567 | AssertPtrReturn(ppZip, VERR_INVALID_POINTER);
|
---|
1568 |
|
---|
1569 | /*
|
---|
1570 | * Allocate memory for the instance data.
|
---|
1571 | */
|
---|
1572 | PRTZIPDECOMP pZip = (PRTZIPDECOMP)RTMemAlloc(sizeof(RTZIPDECOMP));
|
---|
1573 | if (!pZip)
|
---|
1574 | return VERR_NO_MEMORY;
|
---|
1575 |
|
---|
1576 | /*
|
---|
1577 | * Init instance.
|
---|
1578 | */
|
---|
1579 | pZip->pfnIn = pfnIn;
|
---|
1580 | pZip->enmType = RTZIPTYPE_INVALID;
|
---|
1581 | pZip->pvUser = pvUser;
|
---|
1582 | pZip->pfnDecompress = NULL;
|
---|
1583 | pZip->pfnDestroy = rtZipStubDecompDestroy;
|
---|
1584 |
|
---|
1585 | *ppZip = pZip;
|
---|
1586 | return VINF_SUCCESS;
|
---|
1587 | }
|
---|
1588 | RT_EXPORT_SYMBOL(RTZipDecompCreate);
|
---|
1589 |
|
---|
1590 |
|
---|
1591 | /**
|
---|
1592 | * Lazy init of the decompressor.
|
---|
1593 | * @returns iprt status code.
|
---|
1594 | * @param pZip The decompressor instance.
|
---|
1595 | */
|
---|
1596 | static int rtzipDecompInit(PRTZIPDECOMP pZip)
|
---|
1597 | {
|
---|
1598 | /*
|
---|
1599 | * Read the first byte from the stream so we can determine the type.
|
---|
1600 | */
|
---|
1601 | uint8_t u8Type;
|
---|
1602 | int rc = pZip->pfnIn(pZip->pvUser, &u8Type, sizeof(u8Type), NULL);
|
---|
1603 | if (RT_FAILURE(rc))
|
---|
1604 | return rc;
|
---|
1605 |
|
---|
1606 | /*
|
---|
1607 | * Determine type and do type specific init.
|
---|
1608 | */
|
---|
1609 | pZip->enmType = (RTZIPTYPE)u8Type;
|
---|
1610 | rc = VERR_NOT_SUPPORTED;
|
---|
1611 | switch (pZip->enmType)
|
---|
1612 | {
|
---|
1613 | case RTZIPTYPE_STORE:
|
---|
1614 | #ifdef RTZIP_USE_STORE
|
---|
1615 | rc = rtZipStoreDecompInit(pZip);
|
---|
1616 | #else
|
---|
1617 | AssertMsgFailed(("Store is not include in this build!\n"));
|
---|
1618 | #endif
|
---|
1619 | break;
|
---|
1620 |
|
---|
1621 | case RTZIPTYPE_ZLIB:
|
---|
1622 | case RTZIPTYPE_ZLIB_NO_HEADER:
|
---|
1623 | #ifdef RTZIP_USE_ZLIB
|
---|
1624 | rc = rtZipZlibDecompInit(pZip, pZip->enmType == RTZIPTYPE_ZLIB /*fHeader*/);
|
---|
1625 | #else
|
---|
1626 | AssertMsgFailed(("Zlib is not include in this build!\n"));
|
---|
1627 | #endif
|
---|
1628 | break;
|
---|
1629 |
|
---|
1630 | case RTZIPTYPE_BZLIB:
|
---|
1631 | #ifdef RTZIP_USE_BZLIB
|
---|
1632 | rc = rtZipBZlibDecompInit(pZip);
|
---|
1633 | #else
|
---|
1634 | AssertMsgFailed(("BZlib is not include in this build!\n"));
|
---|
1635 | #endif
|
---|
1636 | break;
|
---|
1637 |
|
---|
1638 | case RTZIPTYPE_LZF:
|
---|
1639 | #ifdef RTZIP_USE_LZF
|
---|
1640 | rc = rtZipLZFDecompInit(pZip);
|
---|
1641 | #else
|
---|
1642 | AssertMsgFailed(("LZF is not include in this build!\n"));
|
---|
1643 | #endif
|
---|
1644 | break;
|
---|
1645 |
|
---|
1646 | case RTZIPTYPE_LZJB:
|
---|
1647 | #ifdef RTZIP_USE_LZJB
|
---|
1648 | AssertMsgFailed(("LZJB streaming support is not implemented yet!\n"));
|
---|
1649 | #else
|
---|
1650 | AssertMsgFailed(("LZJB is not include in this build!\n"));
|
---|
1651 | #endif
|
---|
1652 | break;
|
---|
1653 |
|
---|
1654 | case RTZIPTYPE_LZO:
|
---|
1655 | #ifdef RTZIP_USE_LZJB
|
---|
1656 | AssertMsgFailed(("LZO streaming support is not implemented yet!\n"));
|
---|
1657 | #else
|
---|
1658 | AssertMsgFailed(("LZO is not include in this build!\n"));
|
---|
1659 | #endif
|
---|
1660 | break;
|
---|
1661 |
|
---|
1662 | default:
|
---|
1663 | AssertMsgFailed(("Invalid compression type %d (%#x)!\n", pZip->enmType, pZip->enmType));
|
---|
1664 | rc = VERR_INVALID_MAGIC;
|
---|
1665 | break;
|
---|
1666 | }
|
---|
1667 | if (RT_FAILURE(rc))
|
---|
1668 | {
|
---|
1669 | pZip->pfnDecompress = rtZipStubDecompress;
|
---|
1670 | pZip->pfnDestroy = rtZipStubDecompDestroy;
|
---|
1671 | }
|
---|
1672 |
|
---|
1673 | return rc;
|
---|
1674 | }
|
---|
1675 |
|
---|
1676 |
|
---|
1677 | /**
|
---|
1678 | * Decompresses a chunk of memory.
|
---|
1679 | *
|
---|
1680 | * @returns iprt status code.
|
---|
1681 | * @param pZip The decompressor instance.
|
---|
1682 | * @param pvBuf Where to store the decompressed data.
|
---|
1683 | * @param cbBuf Number of bytes to produce. If pcbWritten is set
|
---|
1684 | * any number of bytes up to cbBuf might be returned.
|
---|
1685 | * @param pcbWritten Number of bytes actually written to the buffer. If NULL
|
---|
1686 | * cbBuf number of bytes must be written.
|
---|
1687 | */
|
---|
1688 | RTDECL(int) RTZipDecompress(PRTZIPDECOMP pZip, void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
---|
1689 | {
|
---|
1690 | /*
|
---|
1691 | * Skip empty requests.
|
---|
1692 | */
|
---|
1693 | if (!cbBuf)
|
---|
1694 | return VINF_SUCCESS;
|
---|
1695 |
|
---|
1696 | /*
|
---|
1697 | * Lazy init.
|
---|
1698 | */
|
---|
1699 | if (!pZip->pfnDecompress)
|
---|
1700 | {
|
---|
1701 | int rc = rtzipDecompInit(pZip);
|
---|
1702 | if (RT_FAILURE(rc))
|
---|
1703 | return rc;
|
---|
1704 | }
|
---|
1705 |
|
---|
1706 | /*
|
---|
1707 | * 'Read' the decompressed stream.
|
---|
1708 | */
|
---|
1709 | return pZip->pfnDecompress(pZip, pvBuf, cbBuf, pcbWritten);
|
---|
1710 | }
|
---|
1711 | RT_EXPORT_SYMBOL(RTZipDecompress);
|
---|
1712 |
|
---|
1713 |
|
---|
1714 | /**
|
---|
1715 | * Destroys the decompressor instance.
|
---|
1716 | *
|
---|
1717 | * @returns iprt status code.
|
---|
1718 | * @param pZip The decompressor instance.
|
---|
1719 | */
|
---|
1720 | RTDECL(int) RTZipDecompDestroy(PRTZIPDECOMP pZip)
|
---|
1721 | {
|
---|
1722 | /*
|
---|
1723 | * Destroy compressor instance and flush the output buffer.
|
---|
1724 | */
|
---|
1725 | int rc = pZip->pfnDestroy(pZip);
|
---|
1726 | AssertRCReturn(rc, rc);
|
---|
1727 |
|
---|
1728 | /*
|
---|
1729 | * Free the instance memory.
|
---|
1730 | */
|
---|
1731 | pZip->enmType = RTZIPTYPE_INVALID;
|
---|
1732 | RTMemFree(pZip);
|
---|
1733 | return rc;
|
---|
1734 | }
|
---|
1735 | RT_EXPORT_SYMBOL(RTZipDecompDestroy);
|
---|
1736 |
|
---|
1737 |
|
---|
1738 | RTDECL(int) RTZipBlockCompress(RTZIPTYPE enmType, RTZIPLEVEL enmLevel, uint32_t fFlags,
|
---|
1739 | void const *pvSrc, size_t cbSrc,
|
---|
1740 | void *pvDst, size_t cbDst, size_t *pcbDstActual) RT_NO_THROW_DEF
|
---|
1741 | {
|
---|
1742 | /* input validation - the crash and burn approach as speed is essential here. */
|
---|
1743 | Assert(enmLevel <= RTZIPLEVEL_MAX && enmLevel >= RTZIPLEVEL_STORE); RT_NOREF_PV(enmLevel);
|
---|
1744 | Assert(!fFlags); RT_NOREF_PV(fFlags);
|
---|
1745 |
|
---|
1746 | /*
|
---|
1747 | * Deal with flags involving prefixes.
|
---|
1748 | */
|
---|
1749 | /** @todo later: type and/or compressed length prefix. */
|
---|
1750 |
|
---|
1751 | /*
|
---|
1752 | * The type specific part.
|
---|
1753 | */
|
---|
1754 | switch (enmType)
|
---|
1755 | {
|
---|
1756 | case RTZIPTYPE_LZF:
|
---|
1757 | {
|
---|
1758 | #ifdef RTZIP_USE_LZF
|
---|
1759 | # if 0
|
---|
1760 | static const uint8_t s_abZero4K[] =
|
---|
1761 | {
|
---|
1762 | 0x01, 0x00, 0x00, 0xe0, 0xff, 0x00, 0xe0, 0xff,
|
---|
1763 | 0x00, 0xe0, 0xff, 0x00, 0xe0, 0xff, 0x00, 0xe0,
|
---|
1764 | 0xff, 0x00, 0xe0, 0xff, 0x00, 0xe0, 0xff, 0x00,
|
---|
1765 | 0xe0, 0xff, 0x00, 0xe0, 0xff, 0x00, 0xe0, 0xff,
|
---|
1766 | 0x00, 0xe0, 0xff, 0x00, 0xe0, 0xff, 0x00, 0xe0,
|
---|
1767 | 0xff, 0x00, 0xe0, 0xff, 0x00, 0xe0, 0xff, 0x00,
|
---|
1768 | 0xe0, 0x7d, 0x00
|
---|
1769 | };
|
---|
1770 | if ( cbSrc == _4K
|
---|
1771 | && !((uintptr_t)pvSrc & 15)
|
---|
1772 | && ASMMemIsZeroPage(pvSrc))
|
---|
1773 | {
|
---|
1774 | if (RT_UNLIKELY(cbDst < sizeof(s_abZero4K)))
|
---|
1775 | return VERR_BUFFER_OVERFLOW;
|
---|
1776 | memcpy(pvDst, s_abZero4K, sizeof(s_abZero4K));
|
---|
1777 | *pcbDstActual = sizeof(s_abZero4K);
|
---|
1778 | break;
|
---|
1779 | }
|
---|
1780 | # endif
|
---|
1781 |
|
---|
1782 | unsigned cbDstActual = lzf_compress(pvSrc, (unsigned)cbSrc, pvDst, (unsigned)cbDst); /** @todo deal with size type overflows */
|
---|
1783 | if (RT_UNLIKELY(cbDstActual < 1))
|
---|
1784 | return VERR_BUFFER_OVERFLOW;
|
---|
1785 | *pcbDstActual = cbDstActual;
|
---|
1786 | break;
|
---|
1787 | #else
|
---|
1788 | return VERR_NOT_SUPPORTED;
|
---|
1789 | #endif
|
---|
1790 | }
|
---|
1791 |
|
---|
1792 | case RTZIPTYPE_STORE:
|
---|
1793 | {
|
---|
1794 | if (cbDst < cbSrc)
|
---|
1795 | return VERR_BUFFER_OVERFLOW;
|
---|
1796 | memcpy(pvDst, pvSrc, cbSrc);
|
---|
1797 | *pcbDstActual = cbSrc;
|
---|
1798 | break;
|
---|
1799 | }
|
---|
1800 |
|
---|
1801 | case RTZIPTYPE_LZJB:
|
---|
1802 | {
|
---|
1803 | #ifdef RTZIP_USE_LZJB
|
---|
1804 | AssertReturn(cbDst > cbSrc, VERR_BUFFER_OVERFLOW);
|
---|
1805 | size_t cbDstActual = lzjb_compress((void *)pvSrc, (uint8_t *)pvDst + 1, cbSrc, cbSrc, 0 /*??*/);
|
---|
1806 | if (cbDstActual == cbSrc)
|
---|
1807 | *(uint8_t *)pvDst = 0;
|
---|
1808 | else
|
---|
1809 | *(uint8_t *)pvDst = 1;
|
---|
1810 | *pcbDstActual = cbDstActual + 1;
|
---|
1811 | break;
|
---|
1812 | #else
|
---|
1813 | return VERR_NOT_SUPPORTED;
|
---|
1814 | #endif
|
---|
1815 | }
|
---|
1816 |
|
---|
1817 | case RTZIPTYPE_LZO:
|
---|
1818 | {
|
---|
1819 | #ifdef RTZIP_USE_LZO
|
---|
1820 | uint64_t Scratch[RT_ALIGN(LZO1X_1_MEM_COMPRESS, sizeof(uint64_t)) / sizeof(uint64_t)];
|
---|
1821 | int rc = lzo_init();
|
---|
1822 | if (RT_UNLIKELY(rc != LZO_E_OK))
|
---|
1823 | return VERR_INTERNAL_ERROR;
|
---|
1824 |
|
---|
1825 | lzo_uint cbDstInOut = cbDst;
|
---|
1826 | rc = lzo1x_1_compress((const lzo_bytep)pvSrc, cbSrc, (lzo_bytep )pvDst, &cbDstInOut, &Scratch[0]);
|
---|
1827 | if (RT_UNLIKELY(rc != LZO_E_OK))
|
---|
1828 | switch (rc)
|
---|
1829 | {
|
---|
1830 | case LZO_E_OUTPUT_OVERRUN: return VERR_BUFFER_OVERFLOW;
|
---|
1831 | default: return VERR_GENERAL_FAILURE;
|
---|
1832 | }
|
---|
1833 | *pcbDstActual = cbDstInOut;
|
---|
1834 | break;
|
---|
1835 | #else
|
---|
1836 | return VERR_NOT_SUPPORTED;
|
---|
1837 | #endif
|
---|
1838 | }
|
---|
1839 |
|
---|
1840 | case RTZIPTYPE_ZLIB:
|
---|
1841 | case RTZIPTYPE_BZLIB:
|
---|
1842 | return VERR_NOT_SUPPORTED;
|
---|
1843 |
|
---|
1844 | default:
|
---|
1845 | AssertMsgFailed(("%d\n", enmType));
|
---|
1846 | return VERR_INVALID_PARAMETER;
|
---|
1847 | }
|
---|
1848 |
|
---|
1849 | return VINF_SUCCESS;
|
---|
1850 | }
|
---|
1851 | RT_EXPORT_SYMBOL(RTZipBlockCompress);
|
---|
1852 |
|
---|
1853 |
|
---|
1854 | RTDECL(int) RTZipBlockDecompress(RTZIPTYPE enmType, uint32_t fFlags,
|
---|
1855 | void const *pvSrc, size_t cbSrc, size_t *pcbSrcActual,
|
---|
1856 | void *pvDst, size_t cbDst, size_t *pcbDstActual) RT_NO_THROW_DEF
|
---|
1857 | {
|
---|
1858 | /* input validation - the crash and burn approach as speed is essential here. */
|
---|
1859 | Assert(!fFlags); RT_NOREF_PV(fFlags);
|
---|
1860 |
|
---|
1861 | /*
|
---|
1862 | * Deal with flags involving prefixes.
|
---|
1863 | */
|
---|
1864 | /** @todo later: type and/or compressed length prefix. */
|
---|
1865 |
|
---|
1866 | /*
|
---|
1867 | * The type specific part.
|
---|
1868 | */
|
---|
1869 | switch (enmType)
|
---|
1870 | {
|
---|
1871 | case RTZIPTYPE_LZF:
|
---|
1872 | {
|
---|
1873 | #ifdef RTZIP_USE_LZF
|
---|
1874 | unsigned cbDstActual = lzf_decompress(pvSrc, (unsigned)cbSrc, pvDst, (unsigned)cbDst); /** @todo deal with size type overflows */
|
---|
1875 | if (RT_UNLIKELY(cbDstActual < 1))
|
---|
1876 | {
|
---|
1877 | # ifndef IPRT_NO_CRT /* no errno */
|
---|
1878 | if (errno == E2BIG)
|
---|
1879 | return VERR_BUFFER_OVERFLOW;
|
---|
1880 | Assert(errno == EINVAL);
|
---|
1881 | # endif
|
---|
1882 | return VERR_GENERAL_FAILURE;
|
---|
1883 | }
|
---|
1884 | if (pcbDstActual)
|
---|
1885 | *pcbDstActual = cbDstActual;
|
---|
1886 | if (pcbSrcActual)
|
---|
1887 | *pcbSrcActual = cbSrc;
|
---|
1888 | break;
|
---|
1889 | #else
|
---|
1890 | return VERR_NOT_SUPPORTED;
|
---|
1891 | #endif
|
---|
1892 | }
|
---|
1893 |
|
---|
1894 | case RTZIPTYPE_STORE:
|
---|
1895 | {
|
---|
1896 | if (cbDst < cbSrc)
|
---|
1897 | return VERR_BUFFER_OVERFLOW;
|
---|
1898 | memcpy(pvDst, pvSrc, cbSrc);
|
---|
1899 | if (pcbDstActual)
|
---|
1900 | *pcbDstActual = cbSrc;
|
---|
1901 | if (pcbSrcActual)
|
---|
1902 | *pcbSrcActual = cbSrc;
|
---|
1903 | break;
|
---|
1904 | }
|
---|
1905 |
|
---|
1906 | case RTZIPTYPE_LZJB:
|
---|
1907 | {
|
---|
1908 | #ifdef RTZIP_USE_LZJB
|
---|
1909 | if (*(uint8_t *)pvSrc == 1)
|
---|
1910 | {
|
---|
1911 | int rc = lzjb_decompress((uint8_t *)pvSrc + 1, pvDst, cbSrc - 1, cbDst, 0 /*??*/);
|
---|
1912 | if (RT_UNLIKELY(rc != 0))
|
---|
1913 | return VERR_GENERAL_FAILURE;
|
---|
1914 | if (pcbDstActual)
|
---|
1915 | *pcbDstActual = cbDst;
|
---|
1916 | }
|
---|
1917 | else
|
---|
1918 | {
|
---|
1919 | AssertReturn(cbDst >= cbSrc - 1, VERR_BUFFER_OVERFLOW);
|
---|
1920 | memcpy(pvDst, (uint8_t *)pvSrc + 1, cbSrc - 1);
|
---|
1921 | if (pcbDstActual)
|
---|
1922 | *pcbDstActual = cbSrc - 1;
|
---|
1923 | }
|
---|
1924 | if (pcbSrcActual)
|
---|
1925 | *pcbSrcActual = cbSrc;
|
---|
1926 | break;
|
---|
1927 | #else
|
---|
1928 | return VERR_NOT_SUPPORTED;
|
---|
1929 | #endif
|
---|
1930 | }
|
---|
1931 |
|
---|
1932 | case RTZIPTYPE_LZO:
|
---|
1933 | {
|
---|
1934 | #ifdef RTZIP_USE_LZO
|
---|
1935 | int rc = lzo_init();
|
---|
1936 | if (RT_UNLIKELY(rc != LZO_E_OK))
|
---|
1937 | return VERR_INTERNAL_ERROR;
|
---|
1938 | lzo_uint cbDstInOut = cbDst;
|
---|
1939 | rc = lzo1x_decompress((const lzo_bytep)pvSrc, cbSrc, (lzo_bytep)pvDst, &cbDstInOut, NULL);
|
---|
1940 | if (RT_UNLIKELY(rc != LZO_E_OK))
|
---|
1941 | switch (rc)
|
---|
1942 | {
|
---|
1943 | case LZO_E_OUTPUT_OVERRUN: return VERR_BUFFER_OVERFLOW;
|
---|
1944 | default:
|
---|
1945 | case LZO_E_INPUT_OVERRUN: return VERR_GENERAL_FAILURE;
|
---|
1946 | }
|
---|
1947 | if (pcbSrcActual)
|
---|
1948 | *pcbSrcActual = cbSrc;
|
---|
1949 | if (pcbDstActual)
|
---|
1950 | *pcbDstActual = cbDstInOut;
|
---|
1951 | break;
|
---|
1952 | #else
|
---|
1953 | return VERR_NOT_SUPPORTED;
|
---|
1954 | #endif
|
---|
1955 | }
|
---|
1956 |
|
---|
1957 | case RTZIPTYPE_ZLIB:
|
---|
1958 | case RTZIPTYPE_ZLIB_NO_HEADER:
|
---|
1959 | {
|
---|
1960 | #ifdef RTZIP_USE_ZLIB
|
---|
1961 | AssertReturn(cbSrc == (uInt)cbSrc, VERR_TOO_MUCH_DATA);
|
---|
1962 | AssertReturn(cbDst == (uInt)cbDst, VERR_OUT_OF_RANGE);
|
---|
1963 |
|
---|
1964 | z_stream ZStrm;
|
---|
1965 | RT_ZERO(ZStrm);
|
---|
1966 | ZStrm.next_in = (Bytef *)pvSrc;
|
---|
1967 | ZStrm.avail_in = (uInt)cbSrc;
|
---|
1968 | ZStrm.next_out = (Bytef *)pvDst;
|
---|
1969 | ZStrm.avail_out = (uInt)cbDst;
|
---|
1970 |
|
---|
1971 | int rc;
|
---|
1972 | if (enmType == RTZIPTYPE_ZLIB)
|
---|
1973 | rc = inflateInit(&ZStrm);
|
---|
1974 | else if (enmType == RTZIPTYPE_ZLIB_NO_HEADER)
|
---|
1975 | rc = inflateInit2(&ZStrm, -Z_DEF_WBITS);
|
---|
1976 | else
|
---|
1977 | AssertFailedReturn(VERR_INTERNAL_ERROR);
|
---|
1978 |
|
---|
1979 | if (RT_UNLIKELY(rc != Z_OK))
|
---|
1980 | return zipErrConvertFromZlib(rc, false /*fCompressing*/);
|
---|
1981 | rc = inflate(&ZStrm, Z_FINISH);
|
---|
1982 | if (rc != Z_STREAM_END)
|
---|
1983 | {
|
---|
1984 | inflateEnd(&ZStrm);
|
---|
1985 | if ((rc == Z_BUF_ERROR && ZStrm.avail_in == 0) || rc == Z_NEED_DICT)
|
---|
1986 | return VERR_ZIP_CORRUPTED;
|
---|
1987 | if (rc == Z_BUF_ERROR)
|
---|
1988 | return VERR_BUFFER_OVERFLOW;
|
---|
1989 | AssertReturn(rc < Z_OK, VERR_GENERAL_FAILURE);
|
---|
1990 | return zipErrConvertFromZlib(rc, false /*fCompressing*/);
|
---|
1991 | }
|
---|
1992 | rc = inflateEnd(&ZStrm);
|
---|
1993 | if (rc != Z_OK)
|
---|
1994 | return zipErrConvertFromZlib(rc, false /*fCompressing*/);
|
---|
1995 |
|
---|
1996 | if (pcbSrcActual)
|
---|
1997 | *pcbSrcActual = cbSrc - ZStrm.avail_in;
|
---|
1998 | if (pcbDstActual)
|
---|
1999 | *pcbDstActual = ZStrm.total_out;
|
---|
2000 | break;
|
---|
2001 | #else
|
---|
2002 | return VERR_NOT_SUPPORTED;
|
---|
2003 | #endif
|
---|
2004 | }
|
---|
2005 |
|
---|
2006 | case RTZIPTYPE_BZLIB:
|
---|
2007 | return VERR_NOT_SUPPORTED;
|
---|
2008 |
|
---|
2009 | default:
|
---|
2010 | AssertMsgFailed(("%d\n", enmType));
|
---|
2011 | return VERR_INVALID_PARAMETER;
|
---|
2012 | }
|
---|
2013 | return VINF_SUCCESS;
|
---|
2014 | }
|
---|
2015 | RT_EXPORT_SYMBOL(RTZipBlockDecompress);
|
---|
2016 |
|
---|