source: nikanabo/current/xdelta/diy/xdelta3-test.h@ 1193

Last change on this file since 1193 was 185, checked in by geyser, 17 years ago
File size: 69.2 KB
RevLine 
[185]1/* xdelta 3 - delta compression tools and library
2 * Copyright (C) 2001, 2003, 2004, 2005, 2006. Joshua P. MacDonald
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#include <math.h>
20
21#ifndef WIN32
22#include <sys/wait.h>
23#endif
24
25#define MSG_IS(x) (stream->msg != NULL && strcmp ((x), stream->msg) == 0)
26
27static const usize_t TWO_MEGS_AND_DELTA = (2 << 20) + (1 << 10);
28static const usize_t ADDR_CACHE_ROUNDS = 10000;
29
30static const usize_t TEST_FILE_MEAN = 16384;
31static const double TEST_ADD_MEAN = 16;
32static const double TEST_ADD_MAX = 256;
33static const double TEST_ADD_RATIO = 0.1;
34static const double TEST_EPSILON = 0.55;
35
36#define TESTBUFSIZE (1024 * 16)
37
38#define TESTFILESIZE (1024)
39
40static char TEST_TARGET_FILE[TESTFILESIZE];
41static char TEST_SOURCE_FILE[TESTFILESIZE];
42static char TEST_DELTA_FILE[TESTFILESIZE];
43static char TEST_RECON_FILE[TESTFILESIZE];
44static char TEST_RECON2_FILE[TESTFILESIZE];
45static char TEST_COPY_FILE[TESTFILESIZE];
46static char TEST_NOPERM_FILE[TESTFILESIZE];
47
48static int test_exponential_dist (usize_t mean, usize_t max);
49
50#define CHECK(cond) if (!(cond)) { DP(RINT "check failure: " #cond); abort(); }
51
52/* Use a fixed soft config so that test values are fixed. See also test_compress_text(). */
53static const char* test_softcfg_str = "-C64,64,4,128,16,8,128";
54
55/******************************************************************************************
56 TEST HELPERS
57 ******************************************************************************************/
58
59static void DOT (void) { DP(RINT "."); }
60static int do_cmd (xd3_stream *stream, const char *buf)
61{
62 int ret;
63 if ((ret = system (buf)) != 0)
64 {
65 if (WIFEXITED (ret))
66 {
67 stream->msg = "command exited non-zero";
68 }
69 else
70 {
71 stream->msg = "abnormal command termination";
72 }
73 return XD3_INTERNAL;
74 }
75 DOT ();
76 return 0;
77}
78static int do_fail (xd3_stream *stream, const char *buf)
79{
80 int ret;
81 ret = system (buf);
82 if (! WIFEXITED (ret) || WEXITSTATUS (ret) != 1)
83 {
84 stream->msg = "command should have not succeeded";
85 DP(RINT "command was %s", buf);
86 return XD3_INTERNAL;
87 }
88 DOT ();
89 return 0;
90}
91
92static int
93test_exponential_dist (usize_t mean, usize_t max)
94{
95 double mean_d = mean;
96 double erand = log (1.0 / (rand () / (double)RAND_MAX));
97 usize_t x = (usize_t) (mean_d * erand + 0.5);
98
99 return min (x, max);
100}
101
102/* Test that the exponential distribution actually produces its mean. */
103static int
104test_random_numbers (xd3_stream *stream, int ignore)
105{
106 int i;
107 usize_t sum = 0;
108 usize_t mean = 50;
109 usize_t n_rounds = 10000;
110 double average, error;
111 double allowed_error = 1.0;
112
113 for (i = 0; i < n_rounds; i += 1)
114 {
115 sum += test_exponential_dist (mean, USIZE_T_MAX);
116 }
117
118 average = (double) sum / (double) n_rounds;
119 error = average - (double) mean;
120
121 if (error < allowed_error && error > -allowed_error)
122 {
123 /*DP(RINT "error is %f\n", error);*/
124 return 0;
125 }
126
127 stream->msg = "random distribution looks broken";
128 return XD3_INTERNAL;
129}
130
131static int
132test_setup (void)
133{
134 static int x = 0;
135 x++;
136 //DP(RINT "test setup: %d", x);
137 sprintf (TEST_TARGET_FILE, "/tmp/xdtest.target.%d", x);
138 sprintf (TEST_SOURCE_FILE, "/tmp/xdtest.source.%d", x);
139 sprintf (TEST_DELTA_FILE, "/tmp/xdtest.delta.%d", x);
140 sprintf (TEST_RECON_FILE, "/tmp/xdtest.recon.%d", x);
141 sprintf (TEST_RECON2_FILE, "/tmp/xdtest.recon2.%d", x);
142 sprintf (TEST_COPY_FILE, "/tmp/xdtest.copy.%d", x);
143 sprintf (TEST_NOPERM_FILE, "/tmp/xdtest.noperm.%d", x);
144 return 0;
145}
146
147static void
148test_unlink (char* file)
149{
150 char buf[TESTBUFSIZE];
151 while (unlink (file) != 0)
152 {
153 if (errno == ENOENT)
154 {
155 break;
156 }
157 sprintf (buf, "rm -f %s", file);
158 system (buf);
159 }
160}
161
162static void
163test_cleanup (void)
164{
165 static int x = 0;
166 x++;
167 //DP(RINT "test cleanup: %d", x);
168 test_unlink (TEST_TARGET_FILE);
169 test_unlink (TEST_SOURCE_FILE);
170 test_unlink (TEST_DELTA_FILE);
171 test_unlink (TEST_RECON_FILE);
172 test_unlink (TEST_RECON2_FILE);
173 test_unlink (TEST_COPY_FILE);
174 test_unlink (TEST_NOPERM_FILE);
175}
176
177static int
178test_make_inputs (xd3_stream *stream, xoff_t *ss_out, xoff_t *ts_out)
179{
180 usize_t ts = (rand () % TEST_FILE_MEAN) + TEST_FILE_MEAN;
181 usize_t ss = (rand () % TEST_FILE_MEAN) + TEST_FILE_MEAN;
182 uint8_t *buf = malloc (ts + ss), *sbuf = buf /*, *tbuf = buf + ss*/;
183 usize_t sadd = 0, sadd_max = ss * TEST_ADD_RATIO;
184 FILE *tf /*, *sf*/;
185 usize_t i, j;
186 int ret;
187
188 if (buf == NULL) { return ENOMEM; }
189
190 if ((tf = fopen (TEST_TARGET_FILE, "w")) == NULL)
191 {
192 stream->msg = "write failed";
193 ret = get_errno ();
194 goto failure;
195 }
196
197 /* Then modify the data to produce copies, everything not copied is an add. The
198 * following logic produces the TEST_ADD_RATIO. The variable SADD contains the number
199 * of adds so far, which should not exceed SADD_MAX. */
200 for (i = 0; i < ss; )
201 {
202 usize_t left = ss - i;
203 usize_t next = test_exponential_dist (TEST_ADD_MEAN, TEST_ADD_MAX);
204 usize_t add_left = sadd_max - sadd;
205 double add_prob = (left == 0) ? 0 : (add_left / left);
206
207 next = min (left, next);
208
209 if (i > 0 && (next > add_left || (rand() / (double)RAND_MAX) >= add_prob))
210 {
211 /* Copy */
212 usize_t offset = rand () % i;
213
214 for (j = 0; j < next; j += 1)
215 {
216 sbuf[i++] = sbuf[offset + j];
217 }
218 }
219 else
220 {
221 /* Add */
222 for (j = 0; j < next; j += 1)
223 {
224 sbuf[i++] = rand ();
225 }
226 }
227 }
228
229 if ((fwrite (sbuf, 1, ss, tf) != ss))
230 {
231 stream->msg = "write failed";
232 ret = get_errno ();
233 goto failure;
234 }
235
236 if ((ret = fclose (tf)) /* || (ret = fclose (sf))*/)
237 {
238 stream->msg = "close failed";
239 ret = get_errno ();
240 goto failure;
241 }
242
243 if (ts_out) { (*ts_out) = ts; }
244 if (ss_out) { (*ss_out) = ss; }
245
246 failure:
247 free (buf);
248 return ret;
249}
250
251static int
252compare_files (xd3_stream *stream, const char* tgt, const char *rec)
253{
254 FILE *orig, *recons;
255 static uint8_t obuf[TESTBUFSIZE], rbuf[TESTBUFSIZE];
256 int offset = 0;
257 int i;
258 int oc, rc;
259
260 if ((orig = fopen (tgt, "r")) == NULL)
261 {
262 DP(RINT "open %s failed", tgt);
263 stream->msg = "open failed";
264 return get_errno ();
265 }
266
267 if ((recons = fopen (rec, "r")) == NULL)
268 {
269 DP(RINT "open %s failed", rec);
270 stream->msg = "open failed";
271 return get_errno ();
272 }
273
274 for (;;)
275 {
276 oc = fread (obuf, 1, TESTBUFSIZE, orig);
277 rc = fread (rbuf, 1, TESTBUFSIZE, recons);
278
279 if (oc < 0 || rc < 0)
280 {
281 stream->msg = "read failed";
282 return get_errno ();
283 }
284
285 if (oc != rc)
286 {
287 stream->msg = "compare files: different length";
288 return XD3_INTERNAL;
289 }
290
291 if (oc == 0)
292 {
293 break;
294 }
295
296 for (i = 0; i < oc; i += 1)
297 {
298 if (obuf[i] != rbuf[i])
299 {
300 stream->msg = "compare files: different values";
301 return XD3_INTERNAL;
302 }
303 }
304
305 offset += oc;
306 }
307
308 fclose (orig);
309 fclose (recons);
310 return 0;
311}
312
313static int
314test_save_copy (const char *origname)
315{
316 char buf[TESTBUFSIZE];
317 int ret;
318
319 sprintf (buf, "cp -f %s %s", origname, TEST_COPY_FILE);
320
321 if ((ret = system (buf)) != 0)
322 {
323 return XD3_INTERNAL;
324 }
325
326 return 0;
327}
328
329static int
330test_file_size (const char* file, xoff_t *size)
331{
332 struct stat sbuf;
333 int ret;
334 (*size) = 0;
335
336 if (stat (file, & sbuf) < 0)
337 {
338 ret = get_errno ();
339 DP(RINT "xdelta3: stat failed: %s: %s\n", file, strerror (ret));
340 return ret;
341 }
342
343 if (! S_ISREG (sbuf.st_mode))
344 {
345 ret = XD3_INTERNAL;
346 DP(RINT "xdelta3: not a regular file: %s: %s\n", file, strerror (ret));
347 return ret;
348 }
349
350 (*size) = sbuf.st_size;
351 return 0;
352}
353
354/******************************************************************************************
355 READ OFFSET
356 ******************************************************************************************/
357
358/* Common test for read_integer errors: encodes a 64-bit value and then attempts to read
359 * as a 32-bit value. If TRUNC is non-zero, attempts to get errors by shortening the
360 * input, otherwise it should overflow. Expects XD3_INTERNAL and MSG. */
361static int
362test_read_integer_error (xd3_stream *stream, int trunto, const char *msg)
363{
364 uint64_t eval = 1ULL << 34;
365 uint32_t rval;
366 xd3_output *buf = NULL;
367 const uint8_t *max;
368 const uint8_t *inp;
369 int ret;
370
371 buf = xd3_alloc_output (stream, buf);
372
373 if ((ret = xd3_emit_uint64_t (stream, & buf, eval)))
374 {
375 goto fail;
376 }
377
378 again:
379
380 inp = buf->base;
381 max = buf->base + buf->next - trunto;
382
383 if ((ret = xd3_read_uint32_t (stream, & inp, max, & rval)) != XD3_INVALID_INPUT ||
384 !MSG_IS (msg))
385 {
386 ret = XD3_INTERNAL;
387 }
388 else if (trunto && trunto < buf->next)
389 {
390 trunto += 1;
391 goto again;
392 }
393 else
394 {
395 ret = 0;
396 }
397
398 fail:
399 xd3_free_output (stream, buf);
400 return ret;
401}
402
403/* Test integer overflow using the above routine. */
404static int
405test_decode_integer_overflow (xd3_stream *stream, int unused)
406{
407 return test_read_integer_error (stream, 0, "overflow in read_intger");
408}
409
410/* Test integer EOI using the above routine. */
411static int
412test_decode_integer_end_of_input (xd3_stream *stream, int unused)
413{
414 return test_read_integer_error (stream, 1, "end-of-input in read_integer");
415}
416
417/* Test that emit_integer/decode_integer/sizeof_integer/read_integer work on correct
418 * inputs. Tests powers of (2^7), plus or minus, up to the maximum value. */
419#define TEST_ENCODE_DECODE_INTEGER(TYPE,ONE,MAX) \
420 xd3_output *rbuf = NULL; \
421 xd3_output *dbuf = NULL; \
422 TYPE values[64]; \
423 int nvalues = 0; \
424 int i, ret = 0; \
425 \
426 for (i = 0; i < (sizeof (TYPE) * 8); i += 7) \
427 { \
428 values[nvalues++] = (ONE << i) - ONE; \
429 values[nvalues++] = (ONE << i); \
430 values[nvalues++] = (ONE << i) + ONE; \
431 } \
432 \
433 values[nvalues++] = MAX-ONE; \
434 values[nvalues++] = MAX; \
435 \
436 rbuf = xd3_alloc_output (stream, rbuf); \
437 dbuf = xd3_alloc_output (stream, dbuf); \
438 \
439 for (i = 0; i < nvalues; i += 1) \
440 { \
441 const uint8_t *max; \
442 const uint8_t *inp; \
443 TYPE val; \
444 \
445 DOT (); \
446 rbuf->next = 0; \
447 \
448 if ((ret = xd3_emit_ ## TYPE (stream, & rbuf, values[i])) || \
449 (ret = xd3_emit_ ## TYPE (stream, & dbuf, values[i]))) \
450 { \
451 goto fail; \
452 } \
453 \
454 inp = rbuf->base; \
455 max = rbuf->base + rbuf->next; \
456 \
457 if (rbuf->next != xd3_sizeof_ ## TYPE (values[i])) \
458 { \
459 ret = XD3_INTERNAL; \
460 goto fail; \
461 } \
462 \
463 if ((ret = xd3_read_ ## TYPE (stream, & inp, max, & val))) \
464 { \
465 goto fail; \
466 } \
467 \
468 if (val != values[i]) \
469 { \
470 ret = XD3_INTERNAL; \
471 goto fail; \
472 } \
473 \
474 DOT (); \
475 } \
476 \
477 stream->next_in = dbuf->base; \
478 stream->avail_in = dbuf->next; \
479 \
480 for (i = 0; i < nvalues; i += 1) \
481 { \
482 TYPE val; \
483 \
484 if ((ret = xd3_decode_ ## TYPE (stream, & val))) \
485 { \
486 goto fail; \
487 } \
488 \
489 if (val != values[i]) \
490 { \
491 ret = XD3_INTERNAL; \
492 goto fail; \
493 } \
494 } \
495 \
496 if (stream->avail_in != 0) \
497 { \
498 ret = XD3_INTERNAL; \
499 goto fail; \
500 } \
501 \
502 fail: \
503 xd3_free_output (stream, rbuf); \
504 xd3_free_output (stream, dbuf); \
505 \
506 return ret
507
508static int
509test_encode_decode_uint32_t (xd3_stream *stream, int unused)
510{
511 TEST_ENCODE_DECODE_INTEGER(uint32_t,1U,UINT32_MAX);
512}
513
514static int
515test_encode_decode_uint64_t (xd3_stream *stream, int unused)
516{
517 TEST_ENCODE_DECODE_INTEGER(uint64_t,1ULL,UINT64_MAX);
518}
519
520static int
521test_usize_t_overflow (xd3_stream *stream, int unused)
522{
523 if (USIZE_T_OVERFLOW (0, 0)) { goto fail; }
524 if (USIZE_T_OVERFLOW (USIZE_T_MAX, 0)) { goto fail; }
525 if (USIZE_T_OVERFLOW (0, USIZE_T_MAX)) { goto fail; }
526 if (USIZE_T_OVERFLOW (USIZE_T_MAX / 2, 0)) { goto fail; }
527 if (USIZE_T_OVERFLOW (USIZE_T_MAX / 2, USIZE_T_MAX / 2)) { goto fail; }
528 if (USIZE_T_OVERFLOW (USIZE_T_MAX / 2, USIZE_T_MAX / 2 + 1)) { goto fail; }
529
530 if (! USIZE_T_OVERFLOW (USIZE_T_MAX, 1)) { goto fail; }
531 if (! USIZE_T_OVERFLOW (1, USIZE_T_MAX)) { goto fail; }
532 if (! USIZE_T_OVERFLOW (USIZE_T_MAX / 2 + 1, USIZE_T_MAX / 2 + 1)) { goto fail; }
533
534 return 0;
535
536 fail:
537 stream->msg = "incorrect overflow computation";
538 return XD3_INTERNAL;
539}
540
541/******************************************************************************************
542 Address cache
543 ******************************************************************************************/
544
545static int
546test_address_cache (xd3_stream *stream, int unused)
547{
548 int ret, i;
549 usize_t offset;
550 usize_t *addrs;
551 uint8_t *big_buf, *buf_max;
552 const uint8_t *buf;
553 xd3_output *outp;
554 uint8_t *modes;
555 int mode_counts[16];
556
557 stream->acache.s_near = stream->code_table_desc->near_modes;
558 stream->acache.s_same = stream->code_table_desc->same_modes;
559
560 if ((ret = xd3_encode_init (stream))) { return ret; }
561
562 addrs = xd3_alloc (stream, sizeof (usize_t), ADDR_CACHE_ROUNDS);
563 modes = xd3_alloc (stream, sizeof (uint8_t), ADDR_CACHE_ROUNDS);
564
565 memset (mode_counts, 0, sizeof (mode_counts));
566 memset (modes, 0, ADDR_CACHE_ROUNDS);
567
568 addrs[0] = 0;
569
570 srand (0x9f73f7fc);
571
572 /* First pass: encode addresses */
573 xd3_init_cache (& stream->acache);
574
575 for (offset = 1; offset < ADDR_CACHE_ROUNDS; offset += 1)
576 {
577 double p;
578 usize_t addr;
579 usize_t prev_i;
580 usize_t nearby;
581
582 p = (rand () / (double)RAND_MAX);
583 prev_i = rand () % offset;
584 nearby = (rand () % 256) % offset, 1;
585 nearby = max (1U, nearby);
586
587 if (p < 0.1) { addr = addrs[offset-nearby]; }
588 else if (p < 0.4) { addr = min (addrs[prev_i] + nearby, offset-1); }
589 else { addr = prev_i; }
590
591 if ((ret = xd3_encode_address (stream, addr, offset, & modes[offset]))) { return ret; }
592
593 addrs[offset] = addr;
594 mode_counts[modes[offset]] += 1;
595 }
596
597 /* Copy addresses into a contiguous buffer. */
598 big_buf = xd3_alloc (stream, xd3_sizeof_output (ADDR_HEAD (stream)), 1);
599
600 for (offset = 0, outp = ADDR_HEAD (stream); outp != NULL; offset += outp->next, outp = outp->next_page)
601 {
602 memcpy (big_buf + offset, outp->base, outp->next);
603 }
604
605 buf_max = big_buf + offset;
606 buf = big_buf;
607
608 /* Second pass: decode addresses */
609 xd3_init_cache (& stream->acache);
610
611 for (offset = 1; offset < ADDR_CACHE_ROUNDS; offset += 1)
612 {
613 uint32_t addr;
614
615 if ((ret = xd3_decode_address (stream, offset, modes[offset], & buf, buf_max, & addr))) { return ret; }
616
617 if (addr != addrs[offset])
618 {
619 stream->msg = "incorrect decoded address";
620 return XD3_INTERNAL;
621 }
622 }
623
624 /* Check that every byte, mode was used. */
625 if (buf != buf_max)
626 {
627 stream->msg = "address bytes not used";
628 return XD3_INTERNAL;
629 }
630
631 for (i = 0; i < (2 + stream->acache.s_same + stream->acache.s_near); i += 1)
632 {
633 if (mode_counts[i] == 0)
634 {
635 stream->msg = "address mode not used";
636 return XD3_INTERNAL;
637 }
638 }
639
640 xd3_free (stream, modes);
641 xd3_free (stream, addrs);
642 xd3_free (stream, big_buf);
643
644 return 0;
645}
646
647/******************************************************************************************
648 Encode and decode with single bit error
649 ******************************************************************************************/
650
651/* It compresses from 256 to around 185 bytes.
652 * Avoids matching addresses that are a single-bit difference.
653 * Avoids matching address 0. */
654static const uint8_t test_text[] =
655"this is a story\n"
656"abouttttttttttt\n"
657"- his is a stor\n"
658"- about nothing "
659" all. boutique -"
660"his story is a -"
661"about "
662"what happens all"
663" the time what -"
664"am I ttttttt the"
665" person said, so"
666" what, per son -"
667" gory story is -"
668" about nothing -"
669"tttttt to test -"
670"his sto nothing";
671
672static const uint8_t test_apphead[] = "header test";
673
674static int
675test_compress_text (xd3_stream *stream,
676 uint8_t *encoded,
677 usize_t *encoded_size)
678{
679 int ret;
680 xd3_config cfg;
681 int oflags = stream->flags;
682 int flags = stream->flags | XD3_FLUSH;
683
684 xd3_free_stream (stream);
685 xd3_init_config (& cfg, flags);
686
687 /* This configuration is fixed so that the "expected non-error" the counts in
688 * decompress_single_bit_errors are too. See test_coftcfg_str. */
689 cfg.smatch_cfg = XD3_SMATCH_SOFT;
690 cfg.smatcher_soft.name = "test";
691 cfg.smatcher_soft.large_look = 64; /* no source, not used */
692 cfg.smatcher_soft.large_step = 64; /* no source, not used */
693 cfg.smatcher_soft.small_look = 4;
694 cfg.smatcher_soft.small_chain = 128;
695 cfg.smatcher_soft.small_lchain = 16;
696 cfg.smatcher_soft.max_lazy = 8;
697 cfg.smatcher_soft.long_enough = 128;
698
699 xd3_config_stream (stream, & cfg);
700
701 (*encoded_size) = 0;
702
703 xd3_set_appheader (stream, test_apphead, sizeof (test_apphead));
704
705 if ((ret = xd3_encode_stream (stream, test_text, sizeof (test_text),
706 encoded, encoded_size, 4*sizeof (test_text)))) { goto fail; }
707
708 if ((ret = xd3_close_stream (stream))) { goto fail; }
709
710 fail:
711 xd3_free_stream (stream);
712 xd3_init_config (& cfg, oflags);
713 xd3_config_stream (stream, & cfg);
714 return ret;
715}
716
717static int
718test_decompress_text (xd3_stream *stream, uint8_t *enc, usize_t enc_size, usize_t test_desize)
719{
720 xd3_config cfg;
721 char decoded[sizeof (test_text)];
722 uint8_t *apphead;
723 usize_t apphead_size;
724 usize_t decoded_size;
725 const char *msg;
726 int ret;
727 usize_t pos = 0;
728 int flags = stream->flags;
729 usize_t take;
730
731 input:
732 /* Test decoding test_desize input bytes at a time */
733 take = min (enc_size - pos, test_desize);
734 CHECK(take > 0);
735
736 xd3_avail_input (stream, enc + pos, take);
737 again:
738 ret = xd3_decode_input (stream);
739
740 pos += take;
741 take = 0;
742
743 switch (ret)
744 {
745 case XD3_OUTPUT:
746 break;
747 case XD3_WINSTART:
748 case XD3_GOTHEADER:
749 goto again;
750 case XD3_INPUT:
751 if (pos < enc_size) { goto input; }
752 /* else fallthrough */
753 case XD3_WINFINISH:
754 default:
755 goto fail;
756 }
757
758 CHECK(ret == XD3_OUTPUT);
759 CHECK(pos == enc_size);
760
761 if (stream->avail_out != sizeof (test_text))
762 {
763 stream->msg = "incorrect output size";
764 ret = XD3_INTERNAL;
765 goto fail;
766 }
767
768 decoded_size = stream->avail_out;
769 memcpy (decoded, stream->next_out, stream->avail_out);
770
771 xd3_consume_output (stream);
772
773 if ((ret = xd3_get_appheader (stream, & apphead, & apphead_size))) { goto fail; }
774
775 if (apphead_size != sizeof (test_apphead) || memcmp (apphead, test_apphead, sizeof (test_apphead)) != 0)
776 {
777 stream->msg = "incorrect appheader";
778 ret = XD3_INTERNAL;
779 goto fail;
780 }
781
782 if ((ret = xd3_decode_input (stream)) != XD3_WINFINISH ||
783 (ret = xd3_close_stream (stream)) != 0)
784 {
785 goto fail;
786 }
787
788 if (decoded_size != sizeof (test_text) || memcmp (decoded, test_text, sizeof (test_text)) != 0)
789 {
790 stream->msg = "incorrect output text";
791 ret = EIO;
792 }
793
794 fail:
795 msg = stream->msg;
796 xd3_free_stream (stream);
797 xd3_init_config (& cfg, flags);
798 xd3_config_stream (stream, & cfg);
799 stream->msg = msg;
800
801 return ret;
802}
803
804static int
805test_decompress_single_bit_error (xd3_stream *stream, int expected_non_failures)
806{
807 int ret;
808 int i;
809 uint8_t encoded[4*sizeof (test_text)]; /* make room for alt code table */
810 usize_t encoded_size;
811 int non_failures = 0;
812 int cksum = (stream->flags & XD3_ADLER32) != 0;
813
814#if 1
815#define TEST_FAILURES()
816#else
817 /* For checking non-failure cases by hand, enable this macro and run xdelta printdelta
818 * with print_cpymode enabled. Every non-failure should change a copy address mode,
819 * which doesn't cause a failure because the address cache starts out with all zeros.
820
821 ./xdelta3 test
822 for i in test_text.xz.*; do ./xdelta3 printdelta $i > $i.out; diff $i.out test_text.xz.0.out; done
823
824 */
825 system ("rm -rf test_text.*");
826 {
827 char buf[TESTBUFSIZE];
828 FILE *f;
829 sprintf (buf, "test_text");
830 f = fopen (buf, "w");
831 fwrite (test_text,1,sizeof (test_text),f);
832 fclose (f);
833 }
834#define TEST_FAILURES() \
835 do { \
836 char buf[TESTBUFSIZE] \
837 FILE *f; \
838 sprintf (buf, "test_text.xz.%d", non_failures); \
839 f = fopen (buf, "w"); \
840 fwrite (encoded,1,encoded_size,f); \
841 fclose (f); \
842 } while (0)
843#endif
844
845 stream->sec_data.inefficient = 1;
846 stream->sec_inst.inefficient = 1;
847 stream->sec_addr.inefficient = 1;
848
849 /* Encode text, test correct input */
850 if ((ret = test_compress_text (stream, encoded, & encoded_size)))
851 {
852 /*stream->msg = "without error: encode failure";*/
853 return ret;
854 }
855 if ((ret = test_decompress_text (stream, encoded, encoded_size, sizeof (test_text) / 4)))
856 {
857 /*stream->msg = "without error: decode failure";*/
858 return ret;
859 }
860
861 TEST_FAILURES();
862
863 for (i = 0; i < encoded_size*8; i += 1)
864 {
865 /* Single bit error. */
866 encoded[i/8] ^= 1 << (i%8);
867
868 if ((ret = test_decompress_text (stream, encoded, encoded_size, sizeof (test_text))) == 0)
869 {
870 non_failures += 1;
871 /*DP(RINT "%u[%u] non-failure %u\n", i/8, i%8, non_failures);*/
872 TEST_FAILURES();
873 }
874 else
875 {
876 /*DP(RINT "%u[%u] failure: %s\n", i/8, i%8, stream->msg);*/
877 }
878
879 /* decompress_text returns EIO when the final memcmp() fails, but that
880 * should never happen with checksumming on. */
881 if (cksum && ret == EIO)
882 {
883 /*DP(RINT "%u[%u] cksum mismatch\n", i/8, i%8);*/
884 stream->msg = "checksum mismatch";
885 return XD3_INTERNAL;
886 }
887
888 /* Undo single bit error. */
889 encoded[i/8] ^= 1 << (i%8);
890 }
891
892 /* Test correct input again */
893 if ((ret = test_decompress_text (stream, encoded, encoded_size, 1)))
894 {
895 /*stream->msg = "without error: decode failure";*/
896 return ret;
897 }
898
899 /* Check expected non-failures */
900 if (non_failures != expected_non_failures)
901 {
902 DP(RINT "non-failures %u; expected %u", non_failures, expected_non_failures);
903 stream->msg = "incorrect";
904 return XD3_INTERNAL;
905 }
906
907 DOT ();
908
909 return 0;
910}
911
912/******************************************************************************************
913 Secondary compression tests
914 ******************************************************************************************/
915
916#if SECONDARY_ANY
917typedef int (*sec_dist_func) (xd3_stream *stream, xd3_output *data);
918
919static int sec_dist_func1 (xd3_stream *stream, xd3_output *data);
920static int sec_dist_func2 (xd3_stream *stream, xd3_output *data);
921static int sec_dist_func3 (xd3_stream *stream, xd3_output *data);
922static int sec_dist_func4 (xd3_stream *stream, xd3_output *data);
923static int sec_dist_func5 (xd3_stream *stream, xd3_output *data);
924static int sec_dist_func6 (xd3_stream *stream, xd3_output *data);
925static int sec_dist_func7 (xd3_stream *stream, xd3_output *data);
926static int sec_dist_func8 (xd3_stream *stream, xd3_output *data);
927static int sec_dist_func9 (xd3_stream *stream, xd3_output *data);
928
929static sec_dist_func sec_dists[] =
930{
931 sec_dist_func1,
932 sec_dist_func2,
933 sec_dist_func3,
934 sec_dist_func4,
935 sec_dist_func5,
936 sec_dist_func6,
937 sec_dist_func7,
938 sec_dist_func8,
939 sec_dist_func9,
940};
941
942/* Test ditsribution: 100 bytes of the same character (13). */
943static int
944sec_dist_func1 (xd3_stream *stream, xd3_output *data)
945{
946 int i, ret;
947 for (i = 0; i < 100; i += 1)
948 {
949 if ((ret = xd3_emit_byte (stream, & data, 13))) { return ret; }
950 }
951 return 0;
952}
953
954/* Test ditsribution: uniform covering half the alphabet. */
955static int
956sec_dist_func2 (xd3_stream *stream, xd3_output *data)
957{
958 int i, ret;
959 for (i = 0; i < ALPHABET_SIZE; i += 1)
960 {
961 if ((ret = xd3_emit_byte (stream, & data, i%(ALPHABET_SIZE/2)))) { return ret; }
962 }
963 return 0;
964}
965
966/* Test ditsribution: uniform covering the entire alphabet. */
967static int
968sec_dist_func3 (xd3_stream *stream, xd3_output *data)
969{
970 int i, ret;
971 for (i = 0; i < ALPHABET_SIZE; i += 1)
972 {
973 if ((ret = xd3_emit_byte (stream, & data, i%ALPHABET_SIZE))) { return ret; }
974 }
975 return 0;
976}
977
978/* Test distribution: An exponential distribution covering half the alphabet */
979static int
980sec_dist_func4 (xd3_stream *stream, xd3_output *data)
981{
982 int i, ret, x;
983 for (i = 0; i < ALPHABET_SIZE*20; i += 1)
984 {
985 x = test_exponential_dist (10, ALPHABET_SIZE/2);
986 if ((ret = xd3_emit_byte (stream, & data, x))) { return ret; }
987 }
988 return 0;
989}
990
991/* Test distribution: An exponential distribution covering the entire alphabet */
992static int
993sec_dist_func5 (xd3_stream *stream, xd3_output *data)
994{
995 int i, ret, x;
996 for (i = 0; i < ALPHABET_SIZE*20; i += 1)
997 {
998 x = test_exponential_dist (10, ALPHABET_SIZE-1);
999 if ((ret = xd3_emit_byte (stream, & data, x))) { return ret; }
1000 }
1001 return 0;
1002}
1003
1004/* Test distribution: An uniform random distribution covering half the alphabet */
1005static int
1006sec_dist_func6 (xd3_stream *stream, xd3_output *data)
1007{
1008 int i, ret, x;
1009 for (i = 0; i < ALPHABET_SIZE*20; i += 1)
1010 {
1011 x = rand () % (ALPHABET_SIZE/2);
1012 if ((ret = xd3_emit_byte (stream, & data, x))) { return ret; }
1013 }
1014 return 0;
1015}
1016
1017/* Test distribution: An uniform random distribution covering the entire alphabet */
1018static int
1019sec_dist_func7 (xd3_stream *stream, xd3_output *data)
1020{
1021 int i, ret, x;
1022 for (i = 0; i < ALPHABET_SIZE*20; i += 1)
1023 {
1024 x = rand () % ALPHABET_SIZE;
1025 if ((ret = xd3_emit_byte (stream, & data, x))) { return ret; }
1026 }
1027 return 0;
1028}
1029
1030/* Test distribution: A small number of frequent characters, difficult to divide into many
1031 * groups */
1032static int
1033sec_dist_func8 (xd3_stream *stream, xd3_output *data)
1034{
1035 int i, ret;
1036 for (i = 0; i < ALPHABET_SIZE*5; i += 1)
1037 {
1038 if ((ret = xd3_emit_byte (stream, & data, 0))) { return ret; }
1039 if ((ret = xd3_emit_byte (stream, & data, 64))) { return ret; }
1040 if ((ret = xd3_emit_byte (stream, & data, 128))) { return ret; }
1041 if ((ret = xd3_emit_byte (stream, & data, 255))) { return ret; }
1042 }
1043 return 0;
1044}
1045
1046/* Test distribution: One that causes many FGK block promotions (found a bug) */
1047static int
1048sec_dist_func9 (xd3_stream *stream, xd3_output *data)
1049{
1050 int i, ret;
1051
1052 int ramp = 0;
1053 int rcount = 0;
1054 int prom = 0;
1055 int pcount = 0;
1056
1057 /* 200 was long enough to trigger it--only when stricter checking that counted all
1058 * blocks was turned on, but it seems I deleted this code. (missing fgk_free_block on
1059 * line 398). */
1060 for (i = 0; i < ALPHABET_SIZE*200; i += 1)
1061 {
1062 repeat:
1063 if (ramp < ALPHABET_SIZE)
1064 {
1065 /* Initially Nth symbol has (N+1) frequency */
1066 if (rcount <= ramp)
1067 {
1068 rcount += 1;
1069 if ((ret = xd3_emit_byte (stream, & data, ramp))) { return ret; }
1070 continue;
1071 }
1072
1073 ramp += 1;
1074 rcount = 0;
1075 goto repeat;
1076 }
1077
1078 /* Thereafter, promote least freq to max freq */
1079 if (pcount == ALPHABET_SIZE)
1080 {
1081 pcount = 0;
1082 prom = (prom + 1) % ALPHABET_SIZE;
1083 }
1084
1085 pcount += 1;
1086 if ((ret = xd3_emit_byte (stream, & data, prom))) { return ret; }
1087 }
1088
1089 return 0;
1090}
1091
1092static int
1093test_secondary_decode (xd3_stream *stream,
1094 const xd3_sec_type *sec,
1095 usize_t input_size,
1096 usize_t compress_size,
1097 const uint8_t *dec_input,
1098 const uint8_t *dec_correct,
1099 uint8_t *dec_output)
1100{
1101 int ret;
1102 xd3_sec_stream *dec_stream;
1103 const uint8_t *dec_input_used, *dec_input_end;
1104 uint8_t *dec_output_used, *dec_output_end;
1105
1106 if ((dec_stream = sec->alloc (stream)) == NULL) { return ENOMEM; }
1107
1108 sec->init (dec_stream);
1109
1110 dec_input_used = dec_input;
1111 dec_input_end = dec_input + compress_size;
1112
1113 dec_output_used = dec_output;
1114 dec_output_end = dec_output + input_size;
1115
1116 if ((ret = sec->decode (stream, dec_stream,
1117 & dec_input_used, dec_input_end,
1118 & dec_output_used, dec_output_end)))
1119 {
1120 goto fail;
1121 }
1122
1123 if (dec_input_used != dec_input_end)
1124 {
1125 stream->msg = "unused input";
1126 ret = XD3_INTERNAL;
1127 goto fail;
1128 }
1129
1130 if (dec_output_used != dec_output_end)
1131 {
1132 stream->msg = "unfinished output";
1133 ret = XD3_INTERNAL;
1134 goto fail;
1135 }
1136
1137 if (memcmp (dec_output, dec_correct, input_size) != 0)
1138 {
1139 stream->msg = "incorrect output";
1140 ret = XD3_INTERNAL;
1141 goto fail;
1142 }
1143
1144 fail:
1145 sec->destroy (stream, dec_stream);
1146 return ret;
1147}
1148
1149static int
1150test_secondary (xd3_stream *stream, const xd3_sec_type *sec, int groups)
1151{
1152 int test_i, ret;
1153 xd3_output *in_head, *out_head, *p;
1154 usize_t p_off, input_size, compress_size;
1155 uint8_t *dec_input = NULL, *dec_output = NULL, *dec_correct = NULL;
1156 xd3_sec_stream *enc_stream;
1157 xd3_sec_cfg cfg;
1158
1159 memset (& cfg, 0, sizeof (cfg));
1160
1161 cfg.inefficient = 1;
1162
1163 for (cfg.ngroups = 1; cfg.ngroups <= groups; cfg.ngroups += 1)
1164 {
1165 DP(RINT "\n...");
1166 for (test_i = 0; test_i < SIZEOF_ARRAY (sec_dists); test_i += 1)
1167 {
1168 srand (0x84687674);
1169
1170 in_head = xd3_alloc_output (stream, NULL);
1171 out_head = xd3_alloc_output (stream, NULL);
1172 enc_stream = sec->alloc (stream);
1173 dec_input = NULL;
1174 dec_output = NULL;
1175 dec_correct = NULL;
1176
1177 if (in_head == NULL || out_head == NULL || enc_stream == NULL) { goto nomem; }
1178
1179 if ((ret = sec_dists[test_i] (stream, in_head))) { goto fail; }
1180
1181 sec->init (enc_stream);
1182
1183 /* Encode data */
1184 if ((ret = sec->encode (stream, enc_stream, in_head, out_head, & cfg)))
1185 {
1186 DP(RINT "test %u: encode: %s", test_i, stream->msg);
1187 goto fail;
1188 }
1189
1190 /* Calculate sizes, allocate contiguous arrays for decoding */
1191 input_size = xd3_sizeof_output (in_head);
1192 compress_size = xd3_sizeof_output (out_head);
1193
1194 DP(RINT "%.3f", 8.0 * (double) compress_size / (double) input_size);
1195
1196 if ((dec_input = xd3_alloc (stream, compress_size, 1)) == NULL ||
1197 (dec_output = xd3_alloc (stream, input_size, 1)) == NULL ||
1198 (dec_correct = xd3_alloc (stream, input_size, 1)) == NULL) { goto nomem; }
1199
1200 /* Fill the compressed data array */
1201 for (p_off = 0, p = out_head; p != NULL; p_off += p->next, p = p->next_page)
1202 {
1203 memcpy (dec_input + p_off, p->base, p->next);
1204 }
1205
1206 CHECK(p_off == compress_size);
1207
1208 /* Fill the input data array */
1209 for (p_off = 0, p = in_head; p != NULL; p_off += p->next, p = p->next_page)
1210 {
1211 memcpy (dec_correct + p_off, p->base, p->next);
1212 }
1213
1214 CHECK(p_off == input_size);
1215
1216 if ((ret = test_secondary_decode (stream, sec, input_size, compress_size, dec_input, dec_correct, dec_output)))
1217 {
1218 DP(RINT "test %u: decode: %s", test_i, stream->msg);
1219 goto fail;
1220 }
1221
1222 /* Single-bit error test, only cover the first 10 bytes. Some non-failures are
1223 * expected in the Huffman case: Changing the clclen array, for example, may not
1224 * harm the decoding. Really looking for faults here. */
1225 {
1226 int i;
1227 int bytes = min (compress_size, 10U);
1228 for (i = 0; i < bytes * 8; i += 1)
1229 {
1230 dec_input[i/8] ^= 1 << (i%8);
1231
1232 if ((ret = test_secondary_decode (stream, sec, input_size, compress_size, dec_input, dec_correct, dec_output)) == 0)
1233 {
1234 /*DP(RINT "test %u: decode single-bit [%u/%u] error non-failure", test_i, i/8, i%8);*/
1235 }
1236
1237 dec_input[i/8] ^= 1 << (i%8);
1238
1239 if ((i % (2*bytes)) == (2*bytes)-1)
1240 {
1241 DOT ();
1242 }
1243 }
1244 ret = 0;
1245 }
1246
1247 if (0) { nomem: ret = ENOMEM; }
1248
1249 fail:
1250 sec->destroy (stream, enc_stream);
1251 xd3_free_output (stream, in_head);
1252 xd3_free_output (stream, out_head);
1253 xd3_free (stream, dec_input);
1254 xd3_free (stream, dec_output);
1255 xd3_free (stream, dec_correct);
1256
1257 if (ret != 0) { return ret; }
1258 }
1259 }
1260
1261 return 0;
1262}
1263
1264IF_FGK (static int test_secondary_fgk (xd3_stream *stream, int gp) { return test_secondary (stream, & fgk_sec_type, gp); })
1265IF_DJW (static int test_secondary_huff (xd3_stream *stream, int gp) { return test_secondary (stream, & djw_sec_type, gp); })
1266#endif
1267
1268/******************************************************************************************
1269 TEST INSTRUCTION TABLE
1270 ******************************************************************************************/
1271
1272/* Test that xd3_choose_instruction() does the right thing for its code table. */
1273static int
1274test_choose_instruction (xd3_stream *stream, int ignore)
1275{
1276 int i;
1277
1278 stream->code_table = (*stream->code_table_func) ();
1279
1280 for (i = 0; i < 256; i += 1)
1281 {
1282 const xd3_dinst *d = stream->code_table + i;
1283 xd3_rinst prev, inst;
1284
1285 CHECK(d->type1 > 0);
1286
1287 memset (& prev, 0, sizeof (prev));
1288 memset (& inst, 0, sizeof (inst));
1289
1290 if (d->type2 == 0)
1291 {
1292 inst.type = d->type1;
1293
1294 if ((inst.size = d->size1) == 0)
1295 {
1296 inst.size = TESTBUFSIZE;
1297 }
1298
1299 XD3_CHOOSE_INSTRUCTION (stream, NULL, & inst);
1300
1301 if (inst.code2 != 0 || inst.code1 != i)
1302 {
1303 stream->msg = "wrong single instruction";
1304 return XD3_INTERNAL;
1305 }
1306 }
1307 else
1308 {
1309 prev.type = d->type1;
1310 prev.size = d->size1;
1311 inst.type = d->type2;
1312 inst.size = d->size2;
1313
1314 XD3_CHOOSE_INSTRUCTION (stream, & prev, & inst);
1315
1316 if (prev.code2 != i)
1317 {
1318 stream->msg = "wrong double instruction";
1319 return XD3_INTERNAL;
1320 }
1321 }
1322 }
1323
1324 return 0;
1325}
1326
1327/******************************************************************************************
1328 TEST INSTRUCTION TABLE CODING
1329 ******************************************************************************************/
1330
1331#if GENERIC_ENCODE_TABLES
1332/* Test that encoding and decoding a code table works */
1333static int
1334test_encode_code_table (xd3_stream *stream, int ignore)
1335{
1336 int ret;
1337 const uint8_t *comp_data;
1338 usize_t comp_size;
1339
1340 if ((ret = xd3_compute_alternate_table_encoding (stream, & comp_data, & comp_size)))
1341 {
1342 return ret;
1343 }
1344
1345 stream->acache.s_near = __alternate_code_table_desc.near_modes;
1346 stream->acache.s_same = __alternate_code_table_desc.same_modes;
1347
1348 if ((ret = xd3_apply_table_encoding (stream, comp_data, comp_size)))
1349 {
1350 return ret;
1351 }
1352
1353 if (memcmp (stream->code_table, xd3_alternate_code_table (), sizeof (xd3_dinst) * 256) != 0)
1354 {
1355 stream->msg = "wrong code table reconstruction";
1356 return XD3_INTERNAL;
1357 }
1358
1359 return 0;
1360}
1361#endif
1362
1363/******************************************************************************************
1364 64BIT STREAMING
1365 ******************************************************************************************/
1366
1367/* This test encodes and decodes a series of 1 megabyte windows, each containing a long
1368 * run of zeros along with a single xoff_t size record to indicate the sequence. */
1369static int
1370test_streaming (xd3_stream *in_stream, uint8_t *encbuf, uint8_t *decbuf, uint8_t *delbuf, usize_t megs)
1371{
1372 xd3_stream estream, dstream;
1373 int ret;
1374 usize_t i, delsize, decsize;
1375
1376 if ((ret = xd3_config_stream (& estream, NULL)) ||
1377 (ret = xd3_config_stream (& dstream, NULL)))
1378 {
1379 goto fail;
1380 }
1381
1382 for (i = 0; i < megs; i += 1)
1383 {
1384 ((usize_t*) encbuf)[0] = i;
1385
1386 if ((i % 200) == 199) { DOT (); }
1387
1388 if ((ret = xd3_process_stream (1, & estream, xd3_encode_input, 0,
1389 encbuf, 1 << 20,
1390 delbuf, & delsize, 1 << 10)))
1391 {
1392 in_stream->msg = estream.msg;
1393 goto fail;
1394 }
1395
1396 if ((ret = xd3_process_stream (0, & dstream, xd3_decode_input, 0,
1397 delbuf, delsize,
1398 decbuf, & decsize, 1 << 20)))
1399 {
1400 in_stream->msg = dstream.msg;
1401 goto fail;
1402 }
1403
1404 if (decsize != 1 << 20 ||
1405 memcmp (encbuf, decbuf, 1 << 20) != 0)
1406 {
1407 in_stream->msg = "wrong result";
1408 ret = XD3_INTERNAL;
1409 goto fail;
1410 }
1411 }
1412
1413 if ((ret = xd3_close_stream (& estream)) ||
1414 (ret = xd3_close_stream (& dstream)))
1415 {
1416 goto fail;
1417 }
1418
1419 fail:
1420 xd3_free_stream (& estream);
1421 xd3_free_stream (& dstream);
1422 return ret;
1423}
1424
1425/* Run tests of data streaming of over and around 4GB of data. */
1426static int
1427test_compressed_stream_overflow (xd3_stream *stream, int ignore)
1428{
1429 int ret;
1430 uint8_t *buf;
1431
1432 if ((buf = malloc (TWO_MEGS_AND_DELTA)) == NULL) { return ENOMEM; }
1433
1434 memset (buf, 0, TWO_MEGS_AND_DELTA);
1435
1436 /* Test overflow of a 32-bit file offset. */
1437 if (SIZEOF_XOFF_T == 4)
1438 {
1439 ret = test_streaming (stream, buf, buf + (1 << 20), buf + (2 << 20), (1 << 12) + 1);
1440
1441 if (ret == XD3_INTERNAL && MSG_IS ("decoder file offset overflow"))
1442 {
1443 ret = 0;
1444 }
1445 else
1446 {
1447 stream->msg = "expected overflow condition";
1448 ret = XD3_INTERNAL;
1449 goto fail;
1450 }
1451 }
1452
1453 /* Test transfer of exactly 32bits worth of data. */
1454 if ((ret = test_streaming (stream, buf, buf + (1 << 20), buf + (2 << 20), 1 << 12))) { goto fail; }
1455
1456 fail:
1457 free (buf);
1458 return ret;
1459}
1460
1461/******************************************************************************************
1462 COMMAND LINE
1463 ******************************************************************************************/
1464
1465/* For each pair of command templates in the array below, test that encoding and decoding
1466 * commands work. Also check for the expected size delta, which should be approximately
1467 * TEST_ADD_RATIO times the file size created by test_make_inputs. Due to differences in
1468 * the application header, it is suppressed (-A) so that all delta files are the same. */
1469static int
1470test_command_line_arguments (xd3_stream *stream, int ignore)
1471{
1472 int i, ret;
1473
1474 static const char* cmdpairs[] =
1475 {
1476 /* standard input, output */
1477 "%s %s -A < %s > %s", "%s -d < %s > %s",
1478 "%s %s -A -e < %s > %s", "%s -d < %s > %s",
1479 "%s %s -A= encode < %s > %s", "%s decode < %s > %s",
1480 "%s %s -A -q encode < %s > %s", "%s -qdq < %s > %s",
1481
1482 /* file input, standard output */
1483 "%s %s -A= %s > %s", "%s -d %s > %s",
1484 "%s %s -A -e %s > %s", "%s -d %s > %s",
1485 "%s %s encode -A= %s > %s", "%s decode %s > %s",
1486
1487 /* file input, output */
1488 "%s %s -A= %s %s", "%s -d %s %s",
1489 "%s %s -A -e %s %s", "%s -d %s %s",
1490 "%s %s -A= encode %s %s", "%s decode %s %s",
1491
1492 /* option placement */
1493 "%s %s -A -f %s %s", "%s -f -d %s %s",
1494 "%s %s -e -A= %s %s", "%s -d -f %s %s",
1495 "%s %s -f encode -A= %s %s", "%s -f decode -f %s %s",
1496 };
1497
1498 char ecmd[TESTBUFSIZE], dcmd[TESTBUFSIZE];
1499 int pairs = SIZEOF_ARRAY (cmdpairs) / 2;
1500 xoff_t tsize;
1501 xoff_t dsize;
1502 double ratio;
1503
1504 srand (0x89162337);
1505
1506 for (i = 0; i < pairs; i += 1)
1507 {
1508 test_setup ();
1509 if ((ret = test_make_inputs (stream, NULL, & tsize))) { return ret; }
1510
1511 sprintf (ecmd, cmdpairs[2*i], program_name, test_softcfg_str, TEST_TARGET_FILE, TEST_DELTA_FILE);
1512 sprintf (dcmd, cmdpairs[2*i+1], program_name, TEST_DELTA_FILE, TEST_RECON_FILE);
1513
1514 /* Encode and decode. */
1515 if ((ret = system (ecmd)) != 0)
1516 {
1517 DP(RINT "xdelta3: encode command: %s\n", ecmd);
1518 stream->msg = "encode cmd failed";
1519 return XD3_INTERNAL;
1520 }
1521
1522 if ((ret = system (dcmd)) != 0)
1523 {
1524 DP(RINT "xdelta3: decode command: %s\n", dcmd);
1525 stream->msg = "decode cmd failed";
1526 return XD3_INTERNAL;
1527 }
1528
1529 /* Compare the target file. */
1530 if ((ret = compare_files (stream, TEST_TARGET_FILE, TEST_RECON_FILE)))
1531 {
1532 return ret;
1533 }
1534
1535 if ((ret = test_file_size (TEST_DELTA_FILE, & dsize)))
1536 {
1537 return ret;
1538 }
1539
1540 ratio = (double) dsize / (double) tsize;
1541
1542 /* Check that it is not too small, not too large. */
1543 if (ratio >= TEST_ADD_RATIO + TEST_EPSILON)
1544 {
1545 DP(RINT "xdelta3: test encode with size ratio %.3f, expected < %.3f (%"Q"u, %"Q"u)\n",
1546 ratio, TEST_ADD_RATIO + TEST_EPSILON, dsize, tsize);
1547 stream->msg = "strange encoding";
1548 return XD3_INTERNAL;
1549 }
1550
1551 if (ratio <= TEST_ADD_RATIO - TEST_EPSILON)
1552 {
1553 DP(RINT "xdelta3: test encode with size ratio %.3f, expected > %.3f\n",
1554 ratio, TEST_ADD_RATIO - TEST_EPSILON);
1555 stream->msg = "strange encoding";
1556 return XD3_INTERNAL;
1557 }
1558
1559 /* Also check that compare_files works. The delta and original should not be
1560 * identical. */
1561 if ((ret = compare_files (stream, TEST_DELTA_FILE, TEST_TARGET_FILE)) == 0)
1562 {
1563 stream->msg = "broken compare_files";
1564 return XD3_INTERNAL;
1565 }
1566
1567 test_cleanup ();
1568 DOT ();
1569 }
1570
1571 return 0;
1572}
1573
1574/******************************************************************************************
1575 EXTERNAL I/O DECOMPRESSION/RECOMPRESSION
1576 ******************************************************************************************/
1577
1578#if EXTERNAL_COMPRESSION
1579/* This performs one step of the test_externally_compressed_io function described below.
1580 * It builds a pipe containing both Xdelta and external compression/decompression that
1581 * should not modify the data passing through. */
1582static int
1583test_compressed_pipe (xd3_stream *stream, main_extcomp *ext, char* buf,
1584 const char* comp_options, const char* decomp_options,
1585 int do_ext_recomp, const char* msg)
1586{
1587 int ret;
1588 char decomp_buf[TESTBUFSIZE];
1589
1590 if (do_ext_recomp)
1591 {
1592 sprintf (decomp_buf, " | %s %s", ext->decomp_cmdname, ext->decomp_options);
1593 }
1594 else
1595 {
1596 decomp_buf[0] = 0;
1597 }
1598
1599 sprintf (buf, "%s %s < %s | %s %s | %s %s%s > %s",
1600 ext->recomp_cmdname, ext->recomp_options,
1601 TEST_TARGET_FILE,
1602 program_name, comp_options,
1603 program_name, decomp_options,
1604 decomp_buf,
1605 TEST_RECON_FILE);
1606
1607 if ((ret = system (buf)) != 0)
1608 {
1609 stream->msg = msg;
1610 return XD3_INTERNAL;
1611 }
1612
1613 if ((ret = compare_files (stream, TEST_TARGET_FILE, TEST_RECON_FILE)))
1614 {
1615 return XD3_INTERNAL;
1616 }
1617
1618 DOT ();
1619 return 0;
1620}
1621
1622/* We want to test that a pipe such as:
1623 *
1624 * --> | gzip -cf | xdelta3 -cf | xdelta3 -dcf | gzip -dcf | -->
1625 *
1626 * is transparent, i.e., does not modify the stream of data. However, we also want to
1627 * verify that at the center the data is properly compressed, i.e., that we do not just
1628 * have a re-compressed gzip format, that we have an VCDIFF format. We do this in two
1629 * steps. First test the above pipe, then test with suppressed output recompression
1630 * (-D). The result should be the original input:
1631 *
1632 * --> | gzip -cf | xdelta3 -cf | xdelta3 -Ddcf | -->
1633 *
1634 * Finally we want to test that -D also disables input decompression:
1635 *
1636 * --> | gzip -cf | xdelta3 -Dcf | xdelta3 -Ddcf | gzip -dcf | -->
1637 */
1638static int
1639test_externally_compressed_io (xd3_stream *stream, int ignore)
1640{
1641 int i, ret;
1642 char buf[TESTBUFSIZE];
1643
1644 srand (0x91723913);
1645
1646 if ((ret = test_make_inputs (stream, NULL, NULL))) { return ret; }
1647
1648 for (i = 0; i < SIZEOF_ARRAY (extcomp_types); i += 1)
1649 {
1650 main_extcomp *ext = & extcomp_types[i];
1651
1652 /* Test for the existence of the external command first, if not skip. */
1653 sprintf (buf, "%s %s < /dev/null > /dev/null", ext->recomp_cmdname, ext->recomp_options);
1654
1655 if ((ret = system (buf)) != 0)
1656 {
1657 DP(RINT "%s=0", ext->recomp_cmdname);
1658 continue;
1659 }
1660
1661 if ((ret = test_compressed_pipe (stream, ext, buf, "-cfq", "-dcfq", 1,
1662 "compression failed: identity pipe")) ||
1663 (ret = test_compressed_pipe (stream, ext, buf, "-cfq", "-Rdcfq", 0,
1664 "compression failed: without recompression")) ||
1665 (ret = test_compressed_pipe (stream, ext, buf, "-Dcfq", "-Rdcfq", 1,
1666 "compression failed: without decompression")))
1667 {
1668 return ret;
1669 }
1670 }
1671
1672 return 0;
1673}
1674
1675/* This tests the proper functioning of external decompression for source files. The
1676 * source and target files are identical and compressed by gzip. Decoding such a delta
1677 * with recompression disbaled (-R) should produce the original, uncompressed
1678 * source/target file. Then it checks with output recompression enabled--in this case the
1679 * output should be a compressed copy of the original source/target file. Then it checks
1680 * that encoding with decompression disabled works--the compressed files are identical and
1681 * decoding them should always produce a compressed output, regardless of -R since the
1682 * encoded delta file had decompression disabled..
1683 */
1684static int
1685test_source_decompression (xd3_stream *stream, int ignore)
1686{
1687 int ret;
1688 char buf[TESTBUFSIZE];
1689 const main_extcomp *ext;
1690
1691 srand (0x9ff56acb);
1692
1693 test_setup ();
1694 if ((ret = test_make_inputs (stream, NULL, NULL))) { return ret; }
1695
1696 /* Use gzip. */
1697 if ((ext = main_get_compressor ("G")) == NULL) { DP(RINT "skipped"); return 0; }
1698
1699 /* Save an uncompressed copy. */
1700 if ((ret = test_save_copy (TEST_TARGET_FILE))) { return ret; }
1701
1702 /* Compress the target. */
1703 sprintf (buf, "%s %s < %s > %s", ext->recomp_cmdname, ext->recomp_options, TEST_TARGET_FILE, TEST_SOURCE_FILE);
1704 if ((ret = do_cmd (stream, buf))) { return ret; }
1705
1706 /* Copy back to the source. */
1707 sprintf (buf, "cp -f %s %s", TEST_SOURCE_FILE, TEST_TARGET_FILE);
1708 if ((ret = do_cmd (stream, buf))) { return ret; }
1709
1710 /* Now the two identical files are compressed. Delta-encode the target, with decompression. */
1711 sprintf (buf, "%s -eq -s%s %s %s", program_name, TEST_SOURCE_FILE, TEST_TARGET_FILE, TEST_DELTA_FILE);
1712 if ((ret = do_cmd (stream, buf))) { return ret; }
1713
1714 /* Decode the delta file with recompression disabled, should get an uncompressed file
1715 * out. */
1716 sprintf (buf, "%s -dq -R -s%s %s %s", program_name, TEST_SOURCE_FILE, TEST_DELTA_FILE, TEST_RECON_FILE);
1717 if ((ret = do_cmd (stream, buf))) { return ret; }
1718 if ((ret = compare_files (stream, TEST_COPY_FILE, TEST_RECON_FILE))) { return ret; }
1719
1720 /* Decode the delta file with recompression, should get a compressed file out. But we
1721 * can't compare compressed files directly. */
1722 sprintf (buf, "%s -dqf -s%s %s %s", program_name, TEST_SOURCE_FILE, TEST_DELTA_FILE, TEST_RECON_FILE);
1723 if ((ret = do_cmd (stream, buf))) { return ret; }
1724 sprintf (buf, "%s %s < %s > %s", ext->decomp_cmdname, ext->decomp_options, TEST_RECON_FILE, TEST_RECON2_FILE);
1725 if ((ret = do_cmd (stream, buf))) { return ret; }
1726 if ((ret = compare_files (stream, TEST_COPY_FILE, TEST_RECON2_FILE))) { return ret; }
1727
1728 /* Encode with decompression disabled */
1729 sprintf (buf, "%s -feqD -s%s %s %s", program_name, TEST_SOURCE_FILE, TEST_TARGET_FILE, TEST_DELTA_FILE);
1730 if ((ret = do_cmd (stream, buf))) { return ret; }
1731
1732 /* Decode the delta file with recompression enabled, it doesn't matter, should get the
1733 * compressed file out. */
1734 sprintf (buf, "%s -fdq -s%s %s %s", program_name, TEST_SOURCE_FILE, TEST_DELTA_FILE, TEST_RECON_FILE);
1735 if ((ret = do_cmd (stream, buf))) { return ret; }
1736 if ((ret = compare_files (stream, TEST_TARGET_FILE, TEST_RECON_FILE))) { return ret; }
1737
1738 /* Try again with recompression disabled, it doesn't make a difference. */
1739 sprintf (buf, "%s -fqRd -s%s %s %s", program_name, TEST_SOURCE_FILE, TEST_DELTA_FILE, TEST_RECON_FILE);
1740 if ((ret = do_cmd (stream, buf))) { return ret; }
1741 if ((ret = compare_files (stream, TEST_TARGET_FILE, TEST_RECON_FILE))) { return ret; }
1742 test_cleanup();
1743 return 0;
1744}
1745#endif
1746
1747/******************************************************************************************
1748 FORCE, STDOUT
1749 ******************************************************************************************/
1750
1751/* This tests that output will not overwrite an existing file unless -f was specified.
1752 * The test is for encoding (the same code handles it for decoding). */
1753static int
1754test_force_behavior (xd3_stream *stream, int ignore)
1755{
1756 int ret;
1757 char buf[TESTBUFSIZE];
1758
1759 /* Create empty target file */
1760 test_setup ();
1761 sprintf (buf, "cp /dev/null %s", TEST_TARGET_FILE);
1762 if ((ret = do_cmd (stream, buf))) { return ret; }
1763
1764 /* Encode to delta file */
1765 sprintf (buf, "%s -e %s %s", program_name, TEST_TARGET_FILE, TEST_DELTA_FILE);
1766 if ((ret = do_cmd (stream, buf))) { return ret; }
1767
1768 /* Encode again, should fail. */
1769 sprintf (buf, "%s -e %s %s ", program_name, TEST_TARGET_FILE, TEST_DELTA_FILE);
1770 if ((ret = do_fail (stream, buf))) { return ret; }
1771
1772 /* Force it, should succeed. */
1773 sprintf (buf, "%s -f -e %s %s", program_name, TEST_TARGET_FILE, TEST_DELTA_FILE);
1774 if ((ret = do_cmd (stream, buf))) { return ret; }
1775 test_cleanup();
1776 return 0;
1777}
1778
1779/* This checks the proper operation of the -c flag. When specified the default output
1780 * becomes stdout, otherwise the input must be provided (encode) or it may be defaulted
1781 * (decode w/ app header). */
1782static int
1783test_stdout_behavior (xd3_stream *stream, int ignore)
1784{
1785 int ret;
1786 char buf[TESTBUFSIZE];
1787
1788 test_setup();
1789 sprintf (buf, "cp /dev/null %s", TEST_TARGET_FILE);
1790 if ((ret = do_cmd (stream, buf))) { return ret; }
1791
1792 /* Without -c, encode writes to delta file */
1793 sprintf (buf, "%s -e %s %s", program_name, TEST_TARGET_FILE, TEST_DELTA_FILE);
1794 if ((ret = do_cmd (stream, buf))) { return ret; }
1795
1796 /* With -c, encode writes to stdout */
1797 sprintf (buf, "%s -e -c %s > %s", program_name, TEST_TARGET_FILE, TEST_DELTA_FILE);
1798 if ((ret = do_cmd (stream, buf))) { return ret; }
1799
1800 /* Without -c, decode writes to target file name, but it fails because the file exists. */
1801 sprintf (buf, "%s -d %s ", program_name, TEST_DELTA_FILE);
1802 if ((ret = do_fail (stream, buf))) { return ret; }
1803
1804 /* With -c, decode writes to stdout */
1805 sprintf (buf, "%s -d -c %s > /dev/null", program_name, TEST_DELTA_FILE);
1806 if ((ret = do_cmd (stream, buf))) { return ret; }
1807 test_cleanup();
1808
1809 return 0;
1810}
1811
1812/* This tests that the no-output flag (-J) works. */
1813static int
1814test_no_output (xd3_stream *stream, int ignore)
1815{
1816 int ret;
1817 char buf[TESTBUFSIZE];
1818
1819 test_setup ();
1820
1821 sprintf (buf, "touch %s && chmod 0000 %s", TEST_NOPERM_FILE, TEST_NOPERM_FILE);
1822 if ((ret = do_cmd (stream, buf))) { return ret; }
1823
1824 if ((ret = test_make_inputs (stream, NULL, NULL))) { return ret; }
1825
1826 /* Try no_output encode w/out unwritable output file */
1827 sprintf (buf, "%s -e %s %s", program_name, TEST_TARGET_FILE, TEST_NOPERM_FILE);
1828 if ((ret = do_fail (stream, buf))) { return ret; }
1829 sprintf (buf, "%s -J -e %s %s", program_name, TEST_TARGET_FILE, TEST_NOPERM_FILE);
1830 if ((ret = do_cmd (stream, buf))) { return ret; }
1831
1832 /* Now really write the delta to test decode no-output */
1833 sprintf (buf, "%s -e %s %s", program_name, TEST_TARGET_FILE, TEST_DELTA_FILE);
1834 if ((ret = do_cmd (stream, buf))) { return ret; }
1835
1836 sprintf (buf, "%s -d %s %s", program_name, TEST_DELTA_FILE, TEST_NOPERM_FILE);
1837 if ((ret = do_fail (stream, buf))) { return ret; }
1838 sprintf (buf, "%s -J -d %s %s", program_name, TEST_DELTA_FILE, TEST_NOPERM_FILE);
1839 if ((ret = do_cmd (stream, buf))) { return ret; }
1840 test_cleanup ();
1841 return 0;
1842}
1843
1844/******************************************************************************************
1845 Source identical optimization
1846 ******************************************************************************************/
1847
1848/* Computing a delta should be fastest when the two inputs are identical, this checks it.
1849 * The library is called to compute a delta between a 10000 byte file, 1000 byte winsize,
1850 * 500 byte source blocksize. The same buffer is used for both source and target. */
1851static int
1852test_identical_behavior (xd3_stream *stream, int ignore)
1853{
1854#define IDB_TGTSZ 10000
1855#define IDB_BLKSZ 500
1856#define IDB_WINSZ 1000
1857#define IDB_DELSZ 1000
1858#define IDB_WINCNT (IDB_TGTSZ / IDB_WINSZ)
1859
1860 int ret, i;
1861 uint8_t buf[IDB_TGTSZ];
1862 uint8_t del[IDB_DELSZ];
1863 uint8_t rec[IDB_TGTSZ];
1864 xd3_source source;
1865 int encwin = 0;
1866 usize_t delpos = 0, recsize;
1867 xd3_config config;
1868
1869 for (i = 0; i < IDB_TGTSZ; i += 1) { buf[i] = rand (); }
1870
1871 stream->winsize = IDB_WINSZ;
1872
1873 source.size = IDB_TGTSZ;
1874 source.blksize = IDB_BLKSZ;
1875 source.name = "";
1876 source.curblk = NULL;
1877 source.curblkno = -1;
1878
1879 if ((ret = xd3_set_source (stream, & source))) { goto fail; }
1880
1881 /* Compute an delta between identical source and targets. */
1882 for (;;)
1883 {
1884 ret = xd3_encode_input (stream);
1885
1886 if (ret == XD3_INPUT)
1887 {
1888 if (encwin == IDB_WINCNT-1) { break; }
1889 xd3_avail_input (stream, buf + (IDB_WINSZ * encwin), IDB_WINSZ);
1890 encwin += 1;
1891 continue;
1892 }
1893
1894 if (ret == XD3_GETSRCBLK)
1895 {
1896 source.curblkno = source.getblkno;
1897 source.onblk = IDB_BLKSZ;
1898 source.curblk = buf + source.getblkno * IDB_BLKSZ;
1899 continue;
1900 }
1901
1902 if (ret == XD3_WINSTART) { continue; }
1903 if (ret == XD3_WINFINISH) { continue; }
1904
1905 if (ret != XD3_OUTPUT) { goto fail; }
1906
1907 CHECK(delpos + stream->avail_out <= IDB_DELSZ);
1908
1909 memcpy (del + delpos, stream->next_out, stream->avail_out);
1910
1911 delpos += stream->avail_out;
1912
1913 xd3_consume_output (stream);
1914 }
1915
1916 /* Reset. */
1917 source.blksize = IDB_TGTSZ;
1918 source.onblk = IDB_TGTSZ;
1919 source.curblk = buf;
1920 source.curblkno = 0;
1921
1922 if ((ret = xd3_close_stream (stream))) { goto fail; }
1923 xd3_free_stream (stream);
1924 xd3_init_config (& config, 0);
1925 if ((ret = xd3_config_stream (stream, & config))) { goto fail; }
1926 if ((ret = xd3_set_source (stream, & source))) { goto fail; }
1927
1928 /* Decode. */
1929 if ((ret = xd3_decode_stream (stream, del, delpos, rec, & recsize, IDB_TGTSZ))) { goto fail; }
1930
1931 /* Check result size and data. */
1932 if (recsize != IDB_TGTSZ) { stream->msg = "wrong size reconstruction"; goto fail; }
1933 if (memcmp (rec, buf, IDB_TGTSZ) != 0) { stream->msg = "wrong data reconstruction"; goto fail; }
1934
1935 /* Check that there was one copy per window. */
1936 IF_DEBUG (if (stream->n_scpy != IDB_WINCNT ||
1937 stream->n_add != 0 ||
1938 stream->n_run != 0) { stream->msg = "wrong copy count"; goto fail; });
1939
1940 /* Check that no checksums were computed because the initial match was presumed. */
1941 IF_DEBUG (if (stream->large_ckcnt != 0) { stream->msg = "wrong checksum behavior"; goto fail; });
1942
1943 ret = 0;
1944 fail:
1945 return ret;
1946}
1947
1948/******************************************************************************************
1949 String matching test
1950 ******************************************************************************************/
1951
1952/* Check particular matching behaviors by calling xd3_string_match_soft directly with
1953 * specific arguments. */
1954typedef struct _string_match_test string_match_test;
1955
1956typedef enum
1957{
1958 SM_NONE = 0,
1959 SM_LAZY = (1 << 1),
1960} string_match_flags;
1961
1962struct _string_match_test
1963{
1964 const char *input;
1965 int flags;
1966 const char *result;
1967};
1968
1969static const string_match_test match_tests[] =
1970{
1971 /* nothing */
1972 { "1234567890", SM_NONE, "" },
1973
1974 /* basic run, copy */
1975 { "11111111112323232323", SM_NONE, "R0/10 C12/8@10" },
1976
1977 /* no run smaller than MIN_RUN=8 */
1978 { "1111111", SM_NONE, "C1/6@0" },
1979 { "11111111", SM_NONE, "R0/8" },
1980
1981 /* simple promotion: the third copy address depends on promotion */
1982 { "ABCDEF_ABCDEF^ABCDEF", SM_NONE, "C7/6@0 C14/6@7" },
1983 /* { "ABCDEF_ABCDEF^ABCDEF", SM_PROMOTE, "C7/6@0 C14/6@0" }, forgotten */
1984
1985 /* simple lazy: there is a better copy starting with "23 X" than "123 " */
1986 { "123 23 XYZ 123 XYZ", SM_NONE, "C11/4@0" },
1987 { "123 23 XYZ 123 XYZ", SM_LAZY, "C11/4@0 C12/6@4" },
1988
1989 /* trylazy: no lazy matches unless there are at least two characters beyond the first
1990 * match */
1991 { "2123_121212", SM_LAZY, "C7/4@5" },
1992 { "2123_1212123", SM_LAZY, "C7/4@5" },
1993 { "2123_1212123_", SM_LAZY, "C7/4@5 C8/5@0" },
1994
1995 /* trylazy: no lazy matches if the copy is >= MAXLAZY=10 */
1996 { "2123_121212123_", SM_LAZY, "C7/6@5 C10/5@0" },
1997 { "2123_12121212123_", SM_LAZY, "C7/8@5 C12/5@0" },
1998 { "2123_1212121212123_", SM_LAZY, "C7/10@5" },
1999
2000 /* lazy run: check a run overlapped by a longer copy */
2001 { "11111112 111111112 1", SM_LAZY, "C1/6@0 R9/8 C10/10@0" },
2002
2003 /* lazy match: match_length,run_l >= min_match tests, shouldn't get any copies within
2004 * the run, no run within the copy */
2005 { "^________^________ ", SM_LAZY, "R1/8 C9/9@0" },
2006
2007 /* chain depth: it only goes back 10. this checks that the 10th match hits and the 11th
2008 * misses. */
2009 { "1234 1234_1234-1234=1234+1234[1234]1234{1234}1234<1234 ", SM_NONE,
2010 "C5/4@0 C10/4@5 C15/4@10 C20/4@15 C25/4@20 C30/4@25 C35/4@30 C40/4@35 C45/4@40 C50/5@0" },
2011 { "1234 1234_1234-1234=1234+1234[1234]1234{1234}1234<1234>1234 ", SM_NONE,
2012 "C5/4@0 C10/4@5 C15/4@10 C20/4@15 C25/4@20 C30/4@25 C35/4@30 C40/4@35 C45/4@40 C50/4@45 C55/4@50" },
2013
2014 /* ssmatch test */
2015 { "ABCDE___ABCDE*** BCDE***", SM_NONE, "C8/5@0 C17/4@1" },
2016 /*{ "ABCDE___ABCDE*** BCDE***", SM_SSMATCH, "C8/5@0 C17/7@9" }, forgotten */
2017};
2018
2019static int
2020test_string_matching (xd3_stream *stream, int ignore)
2021{
2022 int i, ret;
2023 xd3_config config;
2024 char rbuf[TESTBUFSIZE];
2025
2026 for (i = 0; i < SIZEOF_ARRAY (match_tests); i += 1)
2027 {
2028 const string_match_test *test = & match_tests[i];
2029 char *rptr = rbuf;
2030 usize_t len = strlen (test->input);
2031
2032 xd3_free_stream (stream);
2033 xd3_init_config (& config, 0);
2034
2035 config.smatch_cfg = XD3_SMATCH_SOFT;
2036 config.smatcher_soft.large_look = 4;
2037 config.smatcher_soft.large_step = 4;
2038 config.smatcher_soft.small_look = 4;
2039 config.smatcher_soft.small_chain = 10;
2040 config.smatcher_soft.small_lchain = 10;
2041 config.smatcher_soft.max_lazy = (test->flags & SM_LAZY) ? 10 : 0;
2042 config.smatcher_soft.long_enough = 10;
2043
2044 if ((ret = xd3_config_stream (stream, & config))) { return ret; }
2045 if ((ret = xd3_encode_init (stream))) { return ret; }
2046
2047 xd3_avail_input (stream, (uint8_t*)test->input, len);
2048
2049 if ((ret = stream->smatcher.string_match (stream))) { return ret; }
2050
2051 *rptr = 0;
2052 while (! xd3_rlist_empty (& stream->iopt_used))
2053 {
2054 xd3_rinst *inst = xd3_rlist_pop_front (& stream->iopt_used);
2055
2056 switch (inst->type)
2057 {
2058 case XD3_RUN: *rptr++ = 'R'; break;
2059 case XD3_CPY: *rptr++ = 'C'; break;
2060 default: CHECK(0);
2061 }
2062
2063 sprintf (rptr, "%d/%d", inst->pos, inst->size);
2064 rptr += strlen (rptr);
2065
2066 if (inst->type == XD3_CPY)
2067 {
2068 *rptr++ = '@';
2069 sprintf (rptr, "%"Q"d", inst->addr);
2070 rptr += strlen (rptr);
2071 }
2072
2073 *rptr++ = ' ';
2074
2075 xd3_rlist_push_back (& stream->iopt_free, inst);
2076 }
2077
2078 if (rptr != rbuf)
2079 {
2080 rptr -= 1; *rptr = 0;
2081 }
2082
2083 if (strcmp (rbuf, test->result) != 0)
2084 {
2085 DP(RINT "test %u: expected %s: got %s", i, test->result, rbuf);
2086 stream->msg = "wrong result";
2087 return XD3_INTERNAL;
2088 }
2089 }
2090
2091 return 0;
2092}
2093
2094/*
2095 * This is a test for many overlapping instructions. It must be a lazy
2096 * matcher.
2097 */
2098static int
2099test_iopt_flush_instructions (xd3_stream *stream, int ignore)
2100{
2101 int ret, i, tpos = 0;
2102 usize_t delta_size, recon_size;
2103 xd3_config config;
2104 uint8_t target[TESTBUFSIZE];
2105 uint8_t delta[TESTBUFSIZE];
2106 uint8_t recon[TESTBUFSIZE];
2107
2108 xd3_free_stream (stream);
2109 xd3_init_config (& config, 0);
2110
2111 config.smatch_cfg = XD3_SMATCH_SOFT;
2112 config.smatcher_soft.large_look = 16;
2113 config.smatcher_soft.large_step = 16;
2114 config.smatcher_soft.small_look = 4;
2115 config.smatcher_soft.small_chain = 128;
2116 config.smatcher_soft.small_lchain = 16;
2117 config.smatcher_soft.max_lazy = 8;
2118 config.smatcher_soft.long_enough = 128;
2119
2120 if ((ret = xd3_config_stream (stream, & config))) { return ret; }
2121
2122 for (i = 1; i < 250; i++)
2123 {
2124 target[tpos++] = i;
2125 target[tpos++] = i+1;
2126 target[tpos++] = i+2;
2127 target[tpos++] = i+3;
2128 target[tpos++] = 0;
2129 }
2130 for (i = 1; i < 253; i++)
2131 {
2132 target[tpos++] = i;
2133 }
2134
2135 if ((ret = xd3_encode_stream (stream, target, tpos,
2136 delta, & delta_size, sizeof (delta))))
2137 {
2138 return ret;
2139 }
2140
2141 xd3_free_stream(stream);
2142 if ((ret = xd3_config_stream (stream, & config))) { return ret; }
2143
2144 if ((ret = xd3_decode_stream (stream, delta, delta_size,
2145 recon, & recon_size, sizeof (recon))))
2146 {
2147 return ret;
2148 }
2149
2150 CHECK(tpos == recon_size);
2151 CHECK(memcmp(target, recon, recon_size) == 0);
2152
2153 return 0;
2154}
2155
2156/*
2157 * This tests the 32/64bit ambiguity for source-window matching.
2158 */
2159static int
2160test_source_cksum_offset (xd3_stream *stream, int ignore)
2161{
2162 xd3_source source;
2163
2164 // Inputs are:
2165 struct {
2166 xoff_t cpos; // stream->srcwin_cksum_pos;
2167 xoff_t ipos; // stream->total_in;
2168 xoff_t size; // stream->src->size;
2169
2170 usize_t input; // input 32-bit offset
2171 xoff_t output; // output 64-bit offset
2172
2173 } cksum_test[] = {
2174 // If cpos is <= 2^32
2175 { 1, 1, 1, 1, 1 },
2176
2177#if XD3_USE_LARGEFILE64
2178// cpos ipos size input output
2179// 0x____xxxxxULL, 0x____xxxxxULL, 0x____xxxxxULL, 0x___xxxxxUL, 0x____xxxxxULL
2180 { 0x100100000ULL, 0x100000000ULL, 0x100200000ULL, 0x00000000UL, 0x100000000ULL },
2181 { 0x100100000ULL, 0x100000000ULL, 0x100200000ULL, 0xF0000000UL, 0x0F0000000ULL },
2182
2183 { 0x100200000ULL, 0x100100000ULL, 0x100200000ULL, 0x00300000UL, 0x000300000ULL },
2184
2185 { 25771983104ULL, 25770000000ULL, 26414808769ULL, 2139216707UL, 23614053187ULL },
2186
2187#endif
2188
2189 { 0, 0, 0, 0, 0 },
2190 }, *test_ptr;
2191
2192 stream->src = &source;
2193
2194 for (test_ptr = cksum_test; test_ptr->cpos; test_ptr++) {
2195 xoff_t r;
2196 stream->srcwin_cksum_pos = test_ptr->cpos;
2197 stream->total_in = test_ptr->ipos;
2198 stream->src->size = test_ptr->size;
2199
2200 r = xd3_source_cksum_offset(stream, test_ptr->input);
2201 CHECK(r == test_ptr->output);
2202 }
2203 return 0;
2204}
2205
2206static int
2207test_in_memory (xd3_stream *stream, int ignore)
2208{
2209 // test_text is 256 bytes
2210 uint8_t ibuf[sizeof(test_text)];
2211 uint8_t dbuf[sizeof(test_text)];
2212 uint8_t obuf[sizeof(test_text)];
2213 usize_t size = sizeof(test_text);
2214 usize_t dsize, osize;
2215 int r1, r2;
2216 int eflags = SECONDARY_DJW ? XD3_SEC_DJW : 0;
2217
2218 memcpy(ibuf, test_text, size);
2219 memset(ibuf + 128, 0, 16);
2220
2221 r1 = xd3_encode_memory(ibuf, size,
2222 test_text, size,
2223 dbuf, &dsize, size, eflags);
2224
2225 r2 = xd3_decode_memory(dbuf, dsize,
2226 test_text, size,
2227 obuf, &osize, size, 0);
2228
2229 if (r1 != 0 || r2 != 0 || dsize >= (size/2) || dsize < 1 ||
2230 osize != size) {
2231 stream->msg = "encode/decode size error";
2232 return XD3_INTERNAL;
2233 }
2234
2235 if (memcmp(obuf, ibuf, size) != 0) {
2236 stream->msg = "encode/decode data error";
2237 return XD3_INTERNAL;
2238 }
2239
2240 return 0;
2241}
2242
2243/******************************************************************************************
2244 TEST MAIN
2245 ******************************************************************************************/
2246
2247static int
2248xd3_selftest (void)
2249{
2250#define DO_TEST(fn,flags,arg) \
2251 do { \
2252 xd3_stream stream; \
2253 xd3_config config; \
2254 xd3_init_config (& config, flags); \
2255 DP(RINT "xdelta3: testing " #fn "%s...", \
2256 flags ? (" (" #flags ")") : ""); \
2257 if ((ret = xd3_config_stream (& stream, & config) == 0) && \
2258 (ret = test_ ## fn (& stream, arg)) == 0) { \
2259 DP(RINT " success\n"); \
2260 } else { \
2261 DP(RINT " failed: %s: %s\n", xd3_errstring (& stream), \
2262 xd3_mainerror (ret)); } \
2263 xd3_free_stream (& stream); \
2264 if (ret != 0) { goto failure; } \
2265 } while (0)
2266
2267 int ret;
2268
2269 DO_TEST (random_numbers, 0, 0);
2270 DO_TEST (decode_integer_end_of_input, 0, 0);
2271 DO_TEST (decode_integer_overflow, 0, 0);
2272 DO_TEST (encode_decode_uint32_t, 0, 0);
2273 DO_TEST (encode_decode_uint64_t, 0, 0);
2274 DO_TEST (usize_t_overflow, 0, 0);
2275
2276 DO_TEST (address_cache, 0, 0);
2277 IF_GENCODETBL (DO_TEST (address_cache, XD3_ALT_CODE_TABLE, 0));
2278
2279 DO_TEST (string_matching, 0, 0);
2280
2281 DO_TEST (choose_instruction, 0, 0);
2282 IF_GENCODETBL (DO_TEST (choose_instruction, XD3_ALT_CODE_TABLE, 0));
2283 IF_GENCODETBL (DO_TEST (encode_code_table, 0, 0));
2284
2285 DO_TEST (in_memory, 0, 0);
2286 DO_TEST (identical_behavior, 0, 0);
2287 DO_TEST (iopt_flush_instructions, 0, 0);
2288 DO_TEST (source_cksum_offset, 0, 0);
2289
2290 IF_DJW (DO_TEST (secondary_huff, 0, DJW_MAX_GROUPS));
2291 IF_FGK (DO_TEST (secondary_fgk, 0, 1));
2292
2293 DO_TEST (decompress_single_bit_error, 0, 3);
2294 DO_TEST (decompress_single_bit_error, XD3_ADLER32, 3);
2295
2296 IF_FGK (DO_TEST (decompress_single_bit_error, XD3_SEC_FGK, 3));
2297 IF_DJW (DO_TEST (decompress_single_bit_error, XD3_SEC_DJW, 8));
2298
2299 /* There are many expected non-failures for ALT_CODE_TABLE because not all of the
2300 * instruction codes are used. */
2301 IF_GENCODETBL (DO_TEST (decompress_single_bit_error, XD3_ALT_CODE_TABLE, 224));
2302
2303#ifndef WIN32
2304 DO_TEST (force_behavior, 0, 0);
2305 DO_TEST (stdout_behavior, 0, 0);
2306 DO_TEST (no_output, 0, 0);
2307 DO_TEST (command_line_arguments, 0, 0);
2308
2309#if EXTERNAL_COMPRESSION
2310 DO_TEST (source_decompression, 0, 0);
2311 DO_TEST (externally_compressed_io, 0, 0);
2312#endif
2313
2314#endif /* WIN32 */
2315
2316 /* This test takes a while.
2317 */
2318 DO_TEST (compressed_stream_overflow, 0, 0);
2319
2320failure:
2321 test_cleanup ();
2322 return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
2323#undef DO_TEST
2324}
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