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1 // Copyright 2014 PDFium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include <stdint.h> | |
6 | |
7 #include <limits> | |
8 | |
9 #include "codec_int.h" | |
10 #include "testing/gtest/include/gtest/gtest.h" | |
11 #include "../../../testing/fx_string_testhelpers.h" | |
12 | |
13 static const OPJ_OFF_T kSkipError = static_cast<OPJ_OFF_T>(-1); | |
14 static const OPJ_SIZE_T kReadError = static_cast<OPJ_SIZE_T>(-1); | |
15 static const OPJ_SIZE_T kWriteError = static_cast<OPJ_SIZE_T>(-1); | |
16 | |
17 static unsigned char stream_data[] = { | |
Lei Zhang
2015/03/19 01:35:51
can this be const?
Tom Sepez
2015/03/19 18:02:10
Not without casting away const later due to the la
| |
18 0x00, 0x01, 0x02, 0x03, | |
19 0x84, 0x85, 0x86, 0x87, // Include some hi-bytes, too. | |
20 }; | |
21 | |
22 TEST(fxcodec, DecodeDataNullDecodeData) { | |
23 unsigned char buffer[16]; | |
24 DecodeData* ptr = nullptr; | |
25 | |
26 // Error codes, not segvs, should callers pass us a NULL pointer. | |
27 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, sizeof(buffer), ptr)); | |
28 EXPECT_EQ(kWriteError, opj_write_from_memory(buffer, sizeof(buffer), ptr)); | |
29 EXPECT_EQ(kSkipError, opj_skip_from_memory(1, ptr)); | |
30 EXPECT_FALSE(opj_seek_from_memory(1, ptr)); | |
31 } | |
32 | |
33 TEST(fxcodec, DecodeDataNullStream) { | |
34 DecodeData dd(nullptr, 0); | |
35 unsigned char buffer[16]; | |
36 | |
37 // Reads of size 0 do nothing but return an error code. | |
38 memset(buffer, 0xbd, sizeof(buffer)); | |
39 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 0, &dd)); | |
40 EXPECT_EQ(0xbd, buffer[0]); | |
41 | |
42 // Reads of nonzero size do nothing but return an error code. | |
43 memset(buffer, 0xbd, sizeof(buffer)); | |
44 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, sizeof(buffer), &dd)); | |
45 EXPECT_EQ(0xbd, buffer[0]); | |
46 | |
47 // writes of size 0 do nothing but return an error code. | |
48 EXPECT_EQ(kReadError, opj_write_from_memory(buffer, 0, &dd)); | |
49 | |
50 // writes of nonzero size do nothing but return an error code. | |
51 EXPECT_EQ(kReadError, opj_write_from_memory(buffer, sizeof(buffer), &dd)); | |
52 | |
53 // Skips of size 0 always return an error code. | |
54 EXPECT_EQ(kReadError, opj_skip_from_memory(0, &dd)); | |
55 | |
56 // Skips of nonzero size always return an error code. | |
57 EXPECT_EQ(kReadError, opj_skip_from_memory(1, &dd)); | |
58 | |
59 // Seeks to 0 offset return in error. | |
60 EXPECT_FALSE(opj_seek_from_memory(0, &dd)); | |
61 | |
62 // Seeks to non-zero offsets return in error. | |
63 EXPECT_FALSE(opj_seek_from_memory(1, &dd)); | |
64 } | |
65 | |
66 TEST(fxcodec, DecodeDataZeroSize) { | |
67 DecodeData dd(stream_data, 0); | |
68 unsigned char buffer[16]; | |
69 | |
70 // Reads of size 0 do nothing but return an error code. | |
71 memset(buffer, 0xbd, sizeof(buffer)); | |
72 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 0, &dd)); | |
73 EXPECT_EQ(0xbd, buffer[0]); | |
74 | |
75 // Reads of nonzero size do nothing but return an error code. | |
76 memset(buffer, 0xbd, sizeof(buffer)); | |
77 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, sizeof(buffer), &dd)); | |
78 EXPECT_EQ(0xbd, buffer[0]); | |
79 | |
80 // writes of size 0 do nothing but return an error code. | |
81 EXPECT_EQ(kReadError, opj_write_from_memory(buffer, 0, &dd)); | |
82 | |
83 // writes of nonzero size do nothing but return an error code. | |
84 EXPECT_EQ(kReadError, opj_write_from_memory(buffer, sizeof(buffer), &dd)); | |
85 | |
86 // Skips of size 0 always return an error code. | |
87 EXPECT_EQ(kReadError, opj_skip_from_memory(0, &dd)); | |
88 | |
89 // Skips of nonzero size always return an error code. | |
90 EXPECT_EQ(kReadError, opj_skip_from_memory(1, &dd)); | |
91 | |
92 // Seeks to 0 offset return in error. | |
93 EXPECT_FALSE(opj_seek_from_memory(0, &dd)); | |
94 | |
95 // Seeks to non-zero offsets return in error. | |
96 EXPECT_FALSE(opj_seek_from_memory(1, &dd)); | |
97 } | |
98 | |
99 TEST(fxcodec, DecodeDataReadInBounds) { | |
100 unsigned char buffer[16]; | |
101 { | |
102 DecodeData dd(stream_data, sizeof(stream_data)); | |
103 | |
104 // Exact sized read in a single call. | |
105 memset(buffer, 0xbd, sizeof(buffer)); | |
106 EXPECT_EQ(8u, opj_read_from_memory(buffer, sizeof(buffer), &dd)); | |
107 EXPECT_EQ(0x00, buffer[0]); | |
108 EXPECT_EQ(0x01, buffer[1]); | |
109 EXPECT_EQ(0x02, buffer[2]); | |
110 EXPECT_EQ(0x03, buffer[3]); | |
111 EXPECT_EQ(0x84, buffer[4]); | |
112 EXPECT_EQ(0x85, buffer[5]); | |
113 EXPECT_EQ(0x86, buffer[6]); | |
114 EXPECT_EQ(0x87, buffer[7]); | |
115 EXPECT_EQ(0xbd, buffer[8]); | |
116 } | |
117 { | |
118 DecodeData dd(stream_data, sizeof(stream_data)); | |
119 | |
120 // Simple read. | |
121 memset(buffer, 0xbd, sizeof(buffer)); | |
122 EXPECT_EQ(2u, opj_read_from_memory(buffer, 2, &dd)); | |
123 EXPECT_EQ(0x00, buffer[0]); | |
124 EXPECT_EQ(0x01, buffer[1]); | |
125 EXPECT_EQ(0xbd, buffer[2]); | |
126 | |
127 // Read of size 0 doesn't affect things. | |
128 memset(buffer, 0xbd, sizeof(buffer)); | |
129 EXPECT_EQ(0u, opj_read_from_memory(buffer, 0, &dd)); | |
130 EXPECT_EQ(0xbd, buffer[0]); | |
131 | |
132 // Read exactly up to end of data. | |
133 memset(buffer, 0xbd, sizeof(buffer)); | |
134 EXPECT_EQ(6u, opj_read_from_memory(buffer, 6, &dd)); | |
135 EXPECT_EQ(0x02, buffer[0]); | |
136 EXPECT_EQ(0x03, buffer[1]); | |
137 EXPECT_EQ(0x84, buffer[2]); | |
138 EXPECT_EQ(0x85, buffer[3]); | |
139 EXPECT_EQ(0x86, buffer[4]); | |
140 EXPECT_EQ(0x87, buffer[5]); | |
141 EXPECT_EQ(0xbd, buffer[6]); | |
142 | |
143 // Read of size 0 at EOF is still an error. | |
144 memset(buffer, 0xbd, sizeof(buffer)); | |
145 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 0, &dd)); | |
146 EXPECT_EQ(0xbd, buffer[0]); | |
147 } | |
148 } | |
149 | |
150 TEST(fxcodec, DecodeDataReadBeyondBounds) { | |
151 unsigned char buffer[16]; | |
152 { | |
153 DecodeData dd(stream_data, sizeof(stream_data)); | |
154 | |
155 // Read beyond bounds in a single step. | |
156 memset(buffer, 0xbd, sizeof(buffer)); | |
157 EXPECT_EQ(8u, opj_read_from_memory(buffer, sizeof(buffer) + 1, &dd)); | |
158 EXPECT_EQ(0x00, buffer[0]); | |
159 EXPECT_EQ(0x01, buffer[1]); | |
160 EXPECT_EQ(0x02, buffer[2]); | |
161 EXPECT_EQ(0x03, buffer[3]); | |
162 EXPECT_EQ(0x84, buffer[4]); | |
163 EXPECT_EQ(0x85, buffer[5]); | |
164 EXPECT_EQ(0x86, buffer[6]); | |
165 EXPECT_EQ(0x87, buffer[7]); | |
166 EXPECT_EQ(0xbd, buffer[8]); | |
167 } | |
168 { | |
169 DecodeData dd(stream_data, sizeof(stream_data)); | |
170 | |
171 // Read well beyond bounds in a single step. | |
172 memset(buffer, 0xbd, sizeof(buffer)); | |
173 EXPECT_EQ(8u, opj_read_from_memory( | |
174 buffer, std::numeric_limits<OPJ_SIZE_T>::max(), &dd)); | |
175 EXPECT_EQ(0x00, buffer[0]); | |
176 EXPECT_EQ(0x01, buffer[1]); | |
177 EXPECT_EQ(0x02, buffer[2]); | |
178 EXPECT_EQ(0x03, buffer[3]); | |
179 EXPECT_EQ(0x84, buffer[4]); | |
180 EXPECT_EQ(0x85, buffer[5]); | |
181 EXPECT_EQ(0x86, buffer[6]); | |
182 EXPECT_EQ(0x87, buffer[7]); | |
183 EXPECT_EQ(0xbd, buffer[8]); | |
184 } | |
185 { | |
186 DecodeData dd(stream_data, sizeof(stream_data)); | |
187 | |
188 // Read of size 6 gets first 6 bytes. | |
189 // rest of buffer intact. | |
190 memset(buffer, 0xbd, sizeof(buffer)); | |
191 EXPECT_EQ(6u, opj_read_from_memory(buffer, 6, &dd)); | |
192 EXPECT_EQ(0x00, buffer[0]); | |
193 EXPECT_EQ(0x01, buffer[1]); | |
194 EXPECT_EQ(0x02, buffer[2]); | |
195 EXPECT_EQ(0x03, buffer[3]); | |
196 EXPECT_EQ(0x84, buffer[4]); | |
197 EXPECT_EQ(0x85, buffer[5]); | |
198 EXPECT_EQ(0xbd, buffer[6]); | |
199 | |
200 // Read of size 6 gets remaining two bytes. | |
201 memset(buffer, 0xbd, sizeof(buffer)); | |
202 EXPECT_EQ(2u, opj_read_from_memory(buffer, 6, &dd)); | |
203 EXPECT_EQ(0x86, buffer[0]); | |
204 EXPECT_EQ(0x87, buffer[1]); | |
205 EXPECT_EQ(0xbd, buffer[2]); | |
206 | |
207 // Read of 6 more gets nothing and leaves rest of buffer intact. | |
208 memset(buffer, 0xbd, sizeof(buffer)); | |
209 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 6, &dd)); | |
210 EXPECT_EQ(0xbd, buffer[0]); | |
211 } | |
212 } | |
213 | |
214 TEST(fxcodec, DecodeDataWriteInBounds) { | |
215 unsigned char stream[16]; | |
216 static unsigned char buffer_data[] = { | |
217 0x00, 0x01, 0x02, 0x03, 0x80, | |
218 0x80, 0x81, 0x82, 0x83, 0x84, | |
219 }; | |
220 { | |
221 // Pretend the stream can only hold 4 bytes. | |
222 DecodeData dd(stream, 4); | |
223 | |
224 memset(stream, 0xbd, sizeof(stream)); | |
225 EXPECT_EQ(4u, opj_write_from_memory(buffer_data, 4, &dd)); | |
226 EXPECT_EQ(0x00, stream[0]); | |
227 EXPECT_EQ(0x01, stream[1]); | |
228 EXPECT_EQ(0x02, stream[2]); | |
229 EXPECT_EQ(0x03, stream[3]); | |
230 EXPECT_EQ(0xbd, stream[4]); | |
231 } | |
232 { | |
233 // Pretend the stream can only hold 4 bytes. | |
234 DecodeData dd(stream, 4); | |
235 | |
236 memset(stream, 0xbd, sizeof(stream)); | |
237 EXPECT_EQ(2u, opj_write_from_memory(buffer_data, 2, &dd)); | |
238 EXPECT_EQ(2u, opj_write_from_memory(buffer_data, 2, &dd)); | |
239 EXPECT_EQ(0x00, stream[0]); | |
240 EXPECT_EQ(0x01, stream[1]); | |
241 EXPECT_EQ(0x00, stream[2]); | |
242 EXPECT_EQ(0x01, stream[3]); | |
243 EXPECT_EQ(0xbd, stream[4]); | |
244 } | |
245 } | |
246 | |
247 TEST(fxcodec, DecodeDataWriteBeyondBounds) { | |
248 unsigned char stream[16]; | |
249 static unsigned char buffer_data[] = { | |
250 0x10, 0x11, 0x12, 0x13, | |
251 0x94, 0x95, 0x96, 0x97, | |
252 }; | |
253 { | |
254 // Pretend the stream can only hold 4 bytes. | |
255 DecodeData dd(stream, 4); | |
256 | |
257 // Write ending past EOF transfers up til EOF. | |
258 memset(stream, 0xbd, sizeof(stream)); | |
259 EXPECT_EQ(4u, opj_write_from_memory(buffer_data, 5, &dd)); | |
260 EXPECT_EQ(0x10, stream[0]); | |
261 EXPECT_EQ(0x11, stream[1]); | |
262 EXPECT_EQ(0x12, stream[2]); | |
263 EXPECT_EQ(0x13, stream[3]); | |
264 EXPECT_EQ(0xbd, stream[4]); | |
265 | |
266 // Subsequent writes fail. | |
267 memset(stream, 0xbd, sizeof(stream)); | |
268 EXPECT_EQ(kWriteError, opj_write_from_memory(buffer_data, 5, &dd)); | |
269 EXPECT_EQ(0xbd, stream[0]); | |
270 } | |
271 { | |
272 // Pretend the stream can only hold 4 bytes. | |
273 DecodeData dd(stream, 4); | |
274 | |
275 // Write ending past EOF (two steps) transfers up til EOF. | |
276 memset(stream, 0xbd, sizeof(stream)); | |
277 EXPECT_EQ(2u, opj_write_from_memory(buffer_data, 2, &dd)); | |
278 EXPECT_EQ(2u, opj_write_from_memory(buffer_data, 4, &dd)); | |
279 EXPECT_EQ(0x10, stream[0]); | |
280 EXPECT_EQ(0x11, stream[1]); | |
281 EXPECT_EQ(0x10, stream[2]); | |
282 EXPECT_EQ(0x11, stream[3]); | |
283 EXPECT_EQ(0xbd, stream[4]); | |
284 | |
285 // Subsequent writes fail. | |
286 memset(stream, 0xbd, sizeof(stream)); | |
287 EXPECT_EQ(kWriteError, opj_write_from_memory(buffer_data, 5, &dd)); | |
288 EXPECT_EQ(0xbd, stream[0]); | |
289 } | |
290 } | |
291 | |
292 // Note: Some care needs to be taken here because the skip/seek functions | |
293 // take OPJ_OFF_T's as arguments, which are typically a signed type. | |
294 TEST(fxcodec, DecodeDataSkip) { | |
295 unsigned char buffer[16]; | |
296 { | |
297 DecodeData dd(stream_data, sizeof(stream_data)); | |
298 | |
299 // Skiping within buffer is allowed. | |
300 memset(buffer, 0xbd, sizeof(buffer)); | |
301 EXPECT_EQ(1, opj_skip_from_memory(1, &dd)); | |
302 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
303 EXPECT_EQ(0x01, buffer[0]); | |
304 EXPECT_EQ(0xbd, buffer[1]); | |
305 | |
306 // Skiping 0 bytes changes nothing. | |
307 memset(buffer, 0xbd, sizeof(buffer)); | |
308 EXPECT_EQ(0, opj_skip_from_memory(0, &dd)); | |
309 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
310 EXPECT_EQ(0x02, buffer[0]); | |
311 EXPECT_EQ(0xbd, buffer[1]); | |
312 | |
313 // Skiping to EOS-1 is possible. | |
314 memset(buffer, 0xbd, sizeof(buffer)); | |
315 EXPECT_EQ(4, opj_skip_from_memory(4, &dd)); | |
316 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
317 EXPECT_EQ(0x87, buffer[0]); | |
318 EXPECT_EQ(0xbd, buffer[1]); | |
319 | |
320 // Next read fails. | |
321 memset(buffer, 0xbd, sizeof(buffer)); | |
322 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
323 EXPECT_EQ(0xbd, buffer[0]); | |
324 } | |
325 { | |
326 DecodeData dd(stream_data, sizeof(stream_data)); | |
327 | |
328 // Skiping directly to EOS is allowed. | |
329 memset(buffer, 0xbd, sizeof(buffer)); | |
330 EXPECT_EQ(8, opj_skip_from_memory(8, &dd)); | |
331 | |
332 // Next read fails. | |
333 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
334 EXPECT_EQ(0xbd, buffer[0]); | |
335 } | |
336 { | |
337 DecodeData dd(stream_data, sizeof(stream_data)); | |
338 | |
339 // Skipping beyond end of stream is allowed and returns full distance. | |
340 memset(buffer, 0xbd, sizeof(buffer)); | |
341 EXPECT_EQ(9, opj_skip_from_memory(9, &dd)); | |
342 | |
343 // Next read fails. | |
344 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
345 EXPECT_EQ(0xbd, buffer[0]); | |
346 } | |
347 { | |
348 DecodeData dd(stream_data, sizeof(stream_data)); | |
349 | |
350 // Skipping way beyond EOS is allowd, doesn't wrap, and returns | |
351 // full distance. | |
352 memset(buffer, 0xbd, sizeof(buffer)); | |
353 EXPECT_EQ(4, opj_skip_from_memory(4, &dd)); | |
354 EXPECT_EQ(std::numeric_limits<OPJ_OFF_T>::max(), opj_skip_from_memory( | |
355 std::numeric_limits<OPJ_OFF_T>::max(), &dd)); | |
356 | |
357 // Next read fails. If it succeeds, it may mean we wrapped. | |
358 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
359 EXPECT_EQ(0xbd, buffer[0]); | |
360 } | |
361 { | |
362 DecodeData dd(stream_data, sizeof(stream_data)); | |
363 | |
364 // Negative skip within buffer not is allowed, position unchanged. | |
365 memset(buffer, 0xbd, sizeof(buffer)); | |
366 EXPECT_EQ(4, opj_skip_from_memory(4, &dd)); | |
367 EXPECT_EQ(kSkipError, opj_skip_from_memory(-2, &dd)); | |
368 | |
369 // Next read succeeds as if nothing has happenned. | |
370 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
371 EXPECT_EQ(0x84, buffer[0]); | |
372 EXPECT_EQ(0xbd, buffer[1]); | |
373 | |
374 // Negative skip before buffer is not allowed, position unchanged. | |
375 memset(buffer, 0xbd, sizeof(buffer)); | |
376 EXPECT_EQ(kSkipError, opj_skip_from_memory(-4, &dd)); | |
377 | |
378 // Next read succeeds as if nothing has happenned. | |
379 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
380 EXPECT_EQ(0x85, buffer[0]); | |
381 EXPECT_EQ(0xbd, buffer[1]); | |
382 } | |
383 { | |
384 DecodeData dd(stream_data, sizeof(stream_data)); | |
385 | |
386 // Negative skip way before buffer is not allowed, doesn't wrap | |
387 memset(buffer, 0xbd, sizeof(buffer)); | |
388 EXPECT_EQ(4, opj_skip_from_memory(4, &dd)); | |
389 EXPECT_EQ(kSkipError, opj_skip_from_memory( | |
390 std::numeric_limits<OPJ_OFF_T>::min(), &dd)); | |
391 | |
392 // Next read succeeds. If it fails, it may mean we wrapped. | |
393 EXPECT_EQ(1, opj_read_from_memory(buffer, 1, &dd)); | |
394 EXPECT_EQ(0x84, buffer[0]); | |
395 EXPECT_EQ(0xbd, buffer[1]); | |
396 } | |
397 { | |
398 DecodeData dd(stream_data, sizeof(stream_data)); | |
399 | |
400 // Negative skip after EOS isn't alowed, still EOS. | |
401 memset(buffer, 0xbd, sizeof(buffer)); | |
402 EXPECT_EQ(8, opj_skip_from_memory(8, &dd)); | |
403 EXPECT_EQ(kSkipError, opj_skip_from_memory(-4, &dd)); | |
404 | |
405 // Next read fails. | |
406 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
407 EXPECT_EQ(0xbd, buffer[0]); | |
408 } | |
409 | |
410 } | |
411 | |
412 TEST(fxcodec, DecodeDataSeek) { | |
413 unsigned char buffer[16]; | |
414 DecodeData dd(stream_data, sizeof(stream_data)); | |
415 | |
416 // Seeking within buffer is allowed and read succeeds | |
417 memset(buffer, 0xbd, sizeof(buffer)); | |
418 EXPECT_TRUE(opj_seek_from_memory(1, &dd)); | |
419 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
420 EXPECT_EQ(0x01, buffer[0]); | |
421 EXPECT_EQ(0xbd, buffer[1]); | |
422 | |
423 // Seeking before start returns error leaving position unchanged. | |
424 memset(buffer, 0xbd, sizeof(buffer)); | |
425 EXPECT_FALSE(opj_seek_from_memory(-1, &dd)); | |
426 EXPECT_EQ(1, opj_read_from_memory(buffer, 1, &dd)); | |
427 EXPECT_EQ(0x02, buffer[0]); | |
428 EXPECT_EQ(0xbd, buffer[1]); | |
429 | |
430 // Seeking way before start returns error leaving position unchanged. | |
431 memset(buffer, 0xbd, sizeof(buffer)); | |
432 EXPECT_FALSE(opj_seek_from_memory( | |
433 std::numeric_limits<OPJ_OFF_T>::min(), &dd)); | |
434 EXPECT_EQ(1, opj_read_from_memory(buffer, 1, &dd)); | |
435 EXPECT_EQ(0x03, buffer[0]); | |
436 EXPECT_EQ(0xbd, buffer[1]); | |
437 | |
438 // Seeking exactly to EOS is allowed but read fails. | |
439 memset(buffer, 0xbd, sizeof(buffer)); | |
440 EXPECT_TRUE(opj_seek_from_memory(8, &dd)); | |
441 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
442 EXPECT_EQ(0xbd, buffer[0]); | |
443 | |
444 // Seeking back to zero offset is allowed and read succeeds. | |
445 memset(buffer, 0xbd, sizeof(buffer)); | |
446 EXPECT_TRUE(opj_seek_from_memory(0, &dd)); | |
447 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
448 EXPECT_EQ(0x00, buffer[0]); | |
449 EXPECT_EQ(0xbd, buffer[1]); | |
450 | |
451 // Seeking beyond end of stream is allowed but read fails. | |
452 memset(buffer, 0xbd, sizeof(buffer)); | |
453 EXPECT_TRUE(opj_seek_from_memory(16, &dd)); | |
454 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
455 EXPECT_EQ(0xbd, buffer[0]); | |
456 | |
457 // Seeking within buffer after seek past EOF restores good state. | |
458 memset(buffer, 0xbd, sizeof(buffer)); | |
459 EXPECT_TRUE(opj_seek_from_memory(4, &dd)); | |
460 EXPECT_EQ(1u, opj_read_from_memory(buffer, 1, &dd)); | |
461 EXPECT_EQ(0x84, buffer[0]); | |
462 EXPECT_EQ(0xbd, buffer[1]); | |
463 | |
464 // Seeking way beyond EOS is allowed, doesn't wrap, and read fails. | |
465 memset(buffer, 0xbd, sizeof(buffer)); | |
466 EXPECT_TRUE(opj_seek_from_memory( | |
467 std::numeric_limits<OPJ_OFF_T>::max(), &dd)); | |
468 EXPECT_EQ(kReadError, opj_read_from_memory(buffer, 1, &dd)); | |
469 EXPECT_EQ(0xbd, buffer[0]); | |
470 } | |
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