1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <gtest/gtest.h>
18
19 #include <errno.h>
20 #include <fcntl.h>
21 #include <limits.h>
22 #include <math.h>
23 #include <stdio.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <unistd.h>
27 #include <wchar.h>
28 #include <locale.h>
29
30 #include "TemporaryFile.h"
31
TEST(stdio,tmpfile_fileno_fprintf_rewind_fgets)32 TEST(stdio, tmpfile_fileno_fprintf_rewind_fgets) {
33 FILE* fp = tmpfile();
34 ASSERT_TRUE(fp != NULL);
35
36 int fd = fileno(fp);
37 ASSERT_NE(fd, -1);
38
39 struct stat sb;
40 int rc = fstat(fd, &sb);
41 ASSERT_NE(rc, -1);
42 ASSERT_EQ(sb.st_mode & 0777, 0600U);
43
44 rc = fprintf(fp, "hello\n");
45 ASSERT_EQ(rc, 6);
46
47 rewind(fp);
48
49 char buf[16];
50 char* s = fgets(buf, sizeof(buf), fp);
51 ASSERT_TRUE(s != NULL);
52 ASSERT_STREQ("hello\n", s);
53
54 fclose(fp);
55 }
56
TEST(stdio,dprintf)57 TEST(stdio, dprintf) {
58 TemporaryFile tf;
59
60 int rc = dprintf(tf.fd, "hello\n");
61 ASSERT_EQ(rc, 6);
62
63 lseek(tf.fd, SEEK_SET, 0);
64 FILE* tfile = fdopen(tf.fd, "r");
65 ASSERT_TRUE(tfile != NULL);
66
67 char buf[7];
68 ASSERT_EQ(buf, fgets(buf, sizeof(buf), tfile));
69 ASSERT_STREQ("hello\n", buf);
70 // Make sure there isn't anything else in the file.
71 ASSERT_EQ(NULL, fgets(buf, sizeof(buf), tfile));
72 fclose(tfile);
73 }
74
TEST(stdio,getdelim)75 TEST(stdio, getdelim) {
76 FILE* fp = tmpfile();
77 ASSERT_TRUE(fp != NULL);
78
79 const char* line_written = "This is a test";
80 int rc = fprintf(fp, "%s", line_written);
81 ASSERT_EQ(rc, static_cast<int>(strlen(line_written)));
82
83 rewind(fp);
84
85 char* word_read = NULL;
86 size_t allocated_length = 0;
87
88 const char* expected[] = { "This ", " ", "is ", "a ", "test" };
89 for (size_t i = 0; i < 5; ++i) {
90 ASSERT_FALSE(feof(fp));
91 ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), static_cast<int>(strlen(expected[i])));
92 ASSERT_GE(allocated_length, strlen(expected[i]));
93 ASSERT_STREQ(word_read, expected[i]);
94 }
95 // The last read should have set the end-of-file indicator for the stream.
96 ASSERT_TRUE(feof(fp));
97 clearerr(fp);
98
99 // getdelim returns -1 but doesn't set errno if we're already at EOF.
100 // It should set the end-of-file indicator for the stream, though.
101 errno = 0;
102 ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), -1);
103 ASSERT_EQ(0, errno);
104 ASSERT_TRUE(feof(fp));
105
106 free(word_read);
107 fclose(fp);
108 }
109
TEST(stdio,getdelim_invalid)110 TEST(stdio, getdelim_invalid) {
111 FILE* fp = tmpfile();
112 ASSERT_TRUE(fp != NULL);
113
114 char* buffer = NULL;
115 size_t buffer_length = 0;
116
117 // The first argument can't be NULL.
118 errno = 0;
119 ASSERT_EQ(getdelim(NULL, &buffer_length, ' ', fp), -1);
120 ASSERT_EQ(EINVAL, errno);
121
122 // The second argument can't be NULL.
123 errno = 0;
124 ASSERT_EQ(getdelim(&buffer, NULL, ' ', fp), -1);
125 ASSERT_EQ(EINVAL, errno);
126
127 // The underlying fd can't be closed.
128 ASSERT_EQ(0, close(fileno(fp)));
129 errno = 0;
130 ASSERT_EQ(getdelim(&buffer, &buffer_length, ' ', fp), -1);
131 ASSERT_EQ(EBADF, errno);
132 fclose(fp);
133 }
134
TEST(stdio,getline)135 TEST(stdio, getline) {
136 FILE* fp = tmpfile();
137 ASSERT_TRUE(fp != NULL);
138
139 const char* line_written = "This is a test for getline\n";
140 const size_t line_count = 5;
141
142 for (size_t i = 0; i < line_count; ++i) {
143 int rc = fprintf(fp, "%s", line_written);
144 ASSERT_EQ(rc, static_cast<int>(strlen(line_written)));
145 }
146
147 rewind(fp);
148
149 char* line_read = NULL;
150 size_t allocated_length = 0;
151
152 size_t read_line_count = 0;
153 ssize_t read_char_count;
154 while ((read_char_count = getline(&line_read, &allocated_length, fp)) != -1) {
155 ASSERT_EQ(read_char_count, static_cast<int>(strlen(line_written)));
156 ASSERT_GE(allocated_length, strlen(line_written));
157 ASSERT_STREQ(line_read, line_written);
158 ++read_line_count;
159 }
160 ASSERT_EQ(read_line_count, line_count);
161
162 // The last read should have set the end-of-file indicator for the stream.
163 ASSERT_TRUE(feof(fp));
164 clearerr(fp);
165
166 // getline returns -1 but doesn't set errno if we're already at EOF.
167 // It should set the end-of-file indicator for the stream, though.
168 errno = 0;
169 ASSERT_EQ(getline(&line_read, &allocated_length, fp), -1);
170 ASSERT_EQ(0, errno);
171 ASSERT_TRUE(feof(fp));
172
173 free(line_read);
174 fclose(fp);
175 }
176
TEST(stdio,getline_invalid)177 TEST(stdio, getline_invalid) {
178 FILE* fp = tmpfile();
179 ASSERT_TRUE(fp != NULL);
180
181 char* buffer = NULL;
182 size_t buffer_length = 0;
183
184 // The first argument can't be NULL.
185 errno = 0;
186 ASSERT_EQ(getline(NULL, &buffer_length, fp), -1);
187 ASSERT_EQ(EINVAL, errno);
188
189 // The second argument can't be NULL.
190 errno = 0;
191 ASSERT_EQ(getline(&buffer, NULL, fp), -1);
192 ASSERT_EQ(EINVAL, errno);
193
194 // The underlying fd can't be closed.
195 ASSERT_EQ(0, close(fileno(fp)));
196 errno = 0;
197 ASSERT_EQ(getline(&buffer, &buffer_length, fp), -1);
198 ASSERT_EQ(EBADF, errno);
199 fclose(fp);
200 }
201
TEST(stdio,printf_ssize_t)202 TEST(stdio, printf_ssize_t) {
203 // http://b/8253769
204 ASSERT_EQ(sizeof(ssize_t), sizeof(long int));
205 ASSERT_EQ(sizeof(ssize_t), sizeof(size_t));
206 // For our 32-bit ABI, we had a ssize_t definition that confuses GCC into saying:
207 // error: format '%zd' expects argument of type 'signed size_t',
208 // but argument 4 has type 'ssize_t {aka long int}' [-Werror=format]
209 ssize_t v = 1;
210 char buf[32];
211 snprintf(buf, sizeof(buf), "%zd", v);
212 }
213
214 // https://code.google.com/p/android/issues/detail?id=64886
TEST(stdio,snprintf_a)215 TEST(stdio, snprintf_a) {
216 char buf[BUFSIZ];
217 EXPECT_EQ(23, snprintf(buf, sizeof(buf), "<%a>", 9990.235));
218 EXPECT_STREQ("<0x1.3831e147ae148p+13>", buf);
219 }
220
TEST(stdio,snprintf_lc)221 TEST(stdio, snprintf_lc) {
222 char buf[BUFSIZ];
223 wint_t wc = L'a';
224 EXPECT_EQ(3, snprintf(buf, sizeof(buf), "<%lc>", wc));
225 EXPECT_STREQ("<a>", buf);
226 }
227
TEST(stdio,snprintf_ls)228 TEST(stdio, snprintf_ls) {
229 char buf[BUFSIZ];
230 wchar_t* ws = NULL;
231 EXPECT_EQ(8, snprintf(buf, sizeof(buf), "<%ls>", ws));
232 EXPECT_STREQ("<(null)>", buf);
233
234 wchar_t chars[] = { L'h', L'i', 0 };
235 ws = chars;
236 EXPECT_EQ(4, snprintf(buf, sizeof(buf), "<%ls>", ws));
237 EXPECT_STREQ("<hi>", buf);
238 }
239
TEST(stdio,snprintf_n)240 TEST(stdio, snprintf_n) {
241 #if defined(__BIONIC__)
242 // http://b/14492135
243 char buf[32];
244 int i = 1234;
245 EXPECT_EQ(5, snprintf(buf, sizeof(buf), "a %n b", &i));
246 EXPECT_EQ(1234, i);
247 EXPECT_STREQ("a n b", buf);
248 #else
249 GTEST_LOG_(INFO) << "This test does nothing.\n";
250 #endif
251 }
252
TEST(stdio,snprintf_smoke)253 TEST(stdio, snprintf_smoke) {
254 char buf[BUFSIZ];
255
256 snprintf(buf, sizeof(buf), "a");
257 EXPECT_STREQ("a", buf);
258
259 snprintf(buf, sizeof(buf), "%%");
260 EXPECT_STREQ("%", buf);
261
262 snprintf(buf, sizeof(buf), "01234");
263 EXPECT_STREQ("01234", buf);
264
265 snprintf(buf, sizeof(buf), "a%sb", "01234");
266 EXPECT_STREQ("a01234b", buf);
267
268 char* s = NULL;
269 snprintf(buf, sizeof(buf), "a%sb", s);
270 EXPECT_STREQ("a(null)b", buf);
271
272 snprintf(buf, sizeof(buf), "aa%scc", "bb");
273 EXPECT_STREQ("aabbcc", buf);
274
275 snprintf(buf, sizeof(buf), "a%cc", 'b');
276 EXPECT_STREQ("abc", buf);
277
278 snprintf(buf, sizeof(buf), "a%db", 1234);
279 EXPECT_STREQ("a1234b", buf);
280
281 snprintf(buf, sizeof(buf), "a%db", -8123);
282 EXPECT_STREQ("a-8123b", buf);
283
284 snprintf(buf, sizeof(buf), "a%hdb", static_cast<short>(0x7fff0010));
285 EXPECT_STREQ("a16b", buf);
286
287 snprintf(buf, sizeof(buf), "a%hhdb", static_cast<char>(0x7fffff10));
288 EXPECT_STREQ("a16b", buf);
289
290 snprintf(buf, sizeof(buf), "a%lldb", 0x1000000000LL);
291 EXPECT_STREQ("a68719476736b", buf);
292
293 snprintf(buf, sizeof(buf), "a%ldb", 70000L);
294 EXPECT_STREQ("a70000b", buf);
295
296 snprintf(buf, sizeof(buf), "a%pb", reinterpret_cast<void*>(0xb0001234));
297 EXPECT_STREQ("a0xb0001234b", buf);
298
299 snprintf(buf, sizeof(buf), "a%xz", 0x12ab);
300 EXPECT_STREQ("a12abz", buf);
301
302 snprintf(buf, sizeof(buf), "a%Xz", 0x12ab);
303 EXPECT_STREQ("a12ABz", buf);
304
305 snprintf(buf, sizeof(buf), "a%08xz", 0x123456);
306 EXPECT_STREQ("a00123456z", buf);
307
308 snprintf(buf, sizeof(buf), "a%5dz", 1234);
309 EXPECT_STREQ("a 1234z", buf);
310
311 snprintf(buf, sizeof(buf), "a%05dz", 1234);
312 EXPECT_STREQ("a01234z", buf);
313
314 snprintf(buf, sizeof(buf), "a%8dz", 1234);
315 EXPECT_STREQ("a 1234z", buf);
316
317 snprintf(buf, sizeof(buf), "a%-8dz", 1234);
318 EXPECT_STREQ("a1234 z", buf);
319
320 snprintf(buf, sizeof(buf), "A%-11sZ", "abcdef");
321 EXPECT_STREQ("Aabcdef Z", buf);
322
323 snprintf(buf, sizeof(buf), "A%s:%dZ", "hello", 1234);
324 EXPECT_STREQ("Ahello:1234Z", buf);
325
326 snprintf(buf, sizeof(buf), "a%03d:%d:%02dz", 5, 5, 5);
327 EXPECT_STREQ("a005:5:05z", buf);
328
329 void* p = NULL;
330 snprintf(buf, sizeof(buf), "a%d,%pz", 5, p);
331 #if defined(__BIONIC__)
332 EXPECT_STREQ("a5,0x0z", buf);
333 #else // __BIONIC__
334 EXPECT_STREQ("a5,(nil)z", buf);
335 #endif // __BIONIC__
336
337 snprintf(buf, sizeof(buf), "a%lld,%d,%d,%dz", 0x1000000000LL, 6, 7, 8);
338 EXPECT_STREQ("a68719476736,6,7,8z", buf);
339
340 snprintf(buf, sizeof(buf), "a_%f_b", 1.23f);
341 EXPECT_STREQ("a_1.230000_b", buf);
342
343 snprintf(buf, sizeof(buf), "a_%g_b", 3.14);
344 EXPECT_STREQ("a_3.14_b", buf);
345
346 snprintf(buf, sizeof(buf), "%1$s %1$s", "print_me_twice");
347 EXPECT_STREQ("print_me_twice print_me_twice", buf);
348 }
349
TEST(stdio,snprintf_f_special)350 TEST(stdio, snprintf_f_special) {
351 char buf[BUFSIZ];
352 snprintf(buf, sizeof(buf), "%f", nanf(""));
353 EXPECT_STRCASEEQ("NaN", buf);
354
355 snprintf(buf, sizeof(buf), "%f", HUGE_VALF);
356 EXPECT_STRCASEEQ("Inf", buf);
357 }
358
TEST(stdio,snprintf_g_special)359 TEST(stdio, snprintf_g_special) {
360 char buf[BUFSIZ];
361 snprintf(buf, sizeof(buf), "%g", nan(""));
362 EXPECT_STRCASEEQ("NaN", buf);
363
364 snprintf(buf, sizeof(buf), "%g", HUGE_VAL);
365 EXPECT_STRCASEEQ("Inf", buf);
366 }
367
TEST(stdio,snprintf_d_INT_MAX)368 TEST(stdio, snprintf_d_INT_MAX) {
369 char buf[BUFSIZ];
370 snprintf(buf, sizeof(buf), "%d", INT_MAX);
371 EXPECT_STREQ("2147483647", buf);
372 }
373
TEST(stdio,snprintf_d_INT_MIN)374 TEST(stdio, snprintf_d_INT_MIN) {
375 char buf[BUFSIZ];
376 snprintf(buf, sizeof(buf), "%d", INT_MIN);
377 EXPECT_STREQ("-2147483648", buf);
378 }
379
TEST(stdio,snprintf_ld_LONG_MAX)380 TEST(stdio, snprintf_ld_LONG_MAX) {
381 char buf[BUFSIZ];
382 snprintf(buf, sizeof(buf), "%ld", LONG_MAX);
383 #if __LP64__
384 EXPECT_STREQ("9223372036854775807", buf);
385 #else
386 EXPECT_STREQ("2147483647", buf);
387 #endif
388 }
389
TEST(stdio,snprintf_ld_LONG_MIN)390 TEST(stdio, snprintf_ld_LONG_MIN) {
391 char buf[BUFSIZ];
392 snprintf(buf, sizeof(buf), "%ld", LONG_MIN);
393 #if __LP64__
394 EXPECT_STREQ("-9223372036854775808", buf);
395 #else
396 EXPECT_STREQ("-2147483648", buf);
397 #endif
398 }
399
TEST(stdio,snprintf_lld_LLONG_MAX)400 TEST(stdio, snprintf_lld_LLONG_MAX) {
401 char buf[BUFSIZ];
402 snprintf(buf, sizeof(buf), "%lld", LLONG_MAX);
403 EXPECT_STREQ("9223372036854775807", buf);
404 }
405
TEST(stdio,snprintf_lld_LLONG_MIN)406 TEST(stdio, snprintf_lld_LLONG_MIN) {
407 char buf[BUFSIZ];
408 snprintf(buf, sizeof(buf), "%lld", LLONG_MIN);
409 EXPECT_STREQ("-9223372036854775808", buf);
410 }
411
TEST(stdio,snprintf_e)412 TEST(stdio, snprintf_e) {
413 char buf[BUFSIZ];
414
415 snprintf(buf, sizeof(buf), "%e", 1.5);
416 EXPECT_STREQ("1.500000e+00", buf);
417
418 snprintf(buf, sizeof(buf), "%Le", 1.5l);
419 EXPECT_STREQ("1.500000e+00", buf);
420 }
421
TEST(stdio,snprintf_negative_zero_5084292)422 TEST(stdio, snprintf_negative_zero_5084292) {
423 char buf[BUFSIZ];
424
425 snprintf(buf, sizeof(buf), "%f", -0.0);
426 EXPECT_STREQ("-0.000000", buf);
427 }
428
TEST(stdio,snprintf_utf8_15439554)429 TEST(stdio, snprintf_utf8_15439554) {
430 locale_t cloc = newlocale(LC_ALL, "C.UTF-8", 0);
431 locale_t old_locale = uselocale(cloc);
432
433 // http://b/15439554
434 char buf[BUFSIZ];
435
436 // 1-byte character.
437 snprintf(buf, sizeof(buf), "%dx%d", 1, 2);
438 EXPECT_STREQ("1x2", buf);
439 // 2-byte character.
440 snprintf(buf, sizeof(buf), "%d\xc2\xa2%d", 1, 2);
441 EXPECT_STREQ("1¢2", buf);
442 // 3-byte character.
443 snprintf(buf, sizeof(buf), "%d\xe2\x82\xac%d", 1, 2);
444 EXPECT_STREQ("1€2", buf);
445 // 4-byte character.
446 snprintf(buf, sizeof(buf), "%d\xf0\xa4\xad\xa2%d", 1, 2);
447 EXPECT_STREQ("1��2", buf);
448
449 uselocale(old_locale);
450 freelocale(cloc);
451 }
452
TEST(stdio,fprintf_failures_7229520)453 TEST(stdio, fprintf_failures_7229520) {
454 // http://b/7229520
455 FILE* fp;
456
457 // Unbuffered case where the fprintf(3) itself fails.
458 ASSERT_NE(nullptr, fp = tmpfile());
459 setbuf(fp, NULL);
460 ASSERT_EQ(4, fprintf(fp, "epic"));
461 ASSERT_EQ(0, close(fileno(fp)));
462 ASSERT_EQ(-1, fprintf(fp, "fail"));
463 ASSERT_EQ(-1, fclose(fp));
464
465 // Buffered case where we won't notice until the fclose(3).
466 // It's likely this is what was actually seen in http://b/7229520,
467 // and that expecting fprintf to fail is setting yourself up for
468 // disappointment. Remember to check fclose(3)'s return value, kids!
469 ASSERT_NE(nullptr, fp = tmpfile());
470 ASSERT_EQ(4, fprintf(fp, "epic"));
471 ASSERT_EQ(0, close(fileno(fp)));
472 ASSERT_EQ(4, fprintf(fp, "fail"));
473 ASSERT_EQ(-1, fclose(fp));
474 }
475
TEST(stdio,popen)476 TEST(stdio, popen) {
477 FILE* fp = popen("cat /proc/version", "r");
478 ASSERT_TRUE(fp != NULL);
479
480 char buf[16];
481 char* s = fgets(buf, sizeof(buf), fp);
482 buf[13] = '\0';
483 ASSERT_STREQ("Linux version", s);
484
485 ASSERT_EQ(0, pclose(fp));
486 }
487
TEST(stdio,getc)488 TEST(stdio, getc) {
489 FILE* fp = fopen("/proc/version", "r");
490 ASSERT_TRUE(fp != NULL);
491 ASSERT_EQ('L', getc(fp));
492 ASSERT_EQ('i', getc(fp));
493 ASSERT_EQ('n', getc(fp));
494 ASSERT_EQ('u', getc(fp));
495 ASSERT_EQ('x', getc(fp));
496 fclose(fp);
497 }
498
TEST(stdio,putc)499 TEST(stdio, putc) {
500 FILE* fp = fopen("/proc/version", "r");
501 ASSERT_TRUE(fp != NULL);
502 ASSERT_EQ(EOF, putc('x', fp));
503 fclose(fp);
504 }
505
TEST(stdio,sscanf)506 TEST(stdio, sscanf) {
507 char s1[123];
508 int i1;
509 double d1;
510 char s2[123];
511 ASSERT_EQ(3, sscanf(" hello 123 1.23 ", "%s %i %lf %s", s1, &i1, &d1, s2));
512 ASSERT_STREQ("hello", s1);
513 ASSERT_EQ(123, i1);
514 ASSERT_DOUBLE_EQ(1.23, d1);
515 }
516
TEST(stdio,cantwrite_EBADF)517 TEST(stdio, cantwrite_EBADF) {
518 // If we open a file read-only...
519 FILE* fp = fopen("/proc/version", "r");
520
521 // ...all attempts to write to that file should return failure.
522
523 // They should also set errno to EBADF. This isn't POSIX, but it's traditional.
524 // glibc gets the wide-character functions wrong.
525
526 errno = 0;
527 EXPECT_EQ(EOF, putc('x', fp));
528 EXPECT_EQ(EBADF, errno);
529
530 errno = 0;
531 EXPECT_EQ(EOF, fprintf(fp, "hello"));
532 EXPECT_EQ(EBADF, errno);
533
534 errno = 0;
535 EXPECT_EQ(EOF, fwprintf(fp, L"hello"));
536 #if defined(__BIONIC__)
537 EXPECT_EQ(EBADF, errno);
538 #endif
539
540 errno = 0;
541 EXPECT_EQ(0U, fwrite("hello", 1, 2, fp));
542 EXPECT_EQ(EBADF, errno);
543
544 errno = 0;
545 EXPECT_EQ(EOF, fputs("hello", fp));
546 EXPECT_EQ(EBADF, errno);
547
548 errno = 0;
549 EXPECT_EQ(WEOF, fputwc(L'x', fp));
550 #if defined(__BIONIC__)
551 EXPECT_EQ(EBADF, errno);
552 #endif
553 }
554
555 // Tests that we can only have a consistent and correct fpos_t when using
556 // f*pos functions (i.e. fpos doesn't get inside a multi byte character).
TEST(stdio,consistent_fpos_t)557 TEST(stdio, consistent_fpos_t) {
558 ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
559 uselocale(LC_GLOBAL_LOCALE);
560
561 FILE* fp = tmpfile();
562 ASSERT_TRUE(fp != NULL);
563
564 wchar_t mb_one_bytes = L'h';
565 wchar_t mb_two_bytes = 0x00a2;
566 wchar_t mb_three_bytes = 0x20ac;
567 wchar_t mb_four_bytes = 0x24b62;
568
569 // Write to file.
570 ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fputwc(mb_one_bytes, fp)));
571 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fputwc(mb_two_bytes, fp)));
572 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fputwc(mb_three_bytes, fp)));
573 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fputwc(mb_four_bytes, fp)));
574
575 rewind(fp);
576
577 // Record each character position.
578 fpos_t pos1;
579 fpos_t pos2;
580 fpos_t pos3;
581 fpos_t pos4;
582 fpos_t pos5;
583 EXPECT_EQ(0, fgetpos(fp, &pos1));
584 ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fgetwc(fp)));
585 EXPECT_EQ(0, fgetpos(fp, &pos2));
586 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp)));
587 EXPECT_EQ(0, fgetpos(fp, &pos3));
588 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fgetwc(fp)));
589 EXPECT_EQ(0, fgetpos(fp, &pos4));
590 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fgetwc(fp)));
591 EXPECT_EQ(0, fgetpos(fp, &pos5));
592
593 #if defined(__BIONIC__)
594 // Bionic's fpos_t is just an alias for off_t. This is inherited from OpenBSD
595 // upstream. Glibc differs by storing the mbstate_t inside its fpos_t. In
596 // Bionic (and upstream OpenBSD) the mbstate_t is stored inside the FILE
597 // structure.
598 ASSERT_EQ(0, static_cast<off_t>(pos1));
599 ASSERT_EQ(1, static_cast<off_t>(pos2));
600 ASSERT_EQ(3, static_cast<off_t>(pos3));
601 ASSERT_EQ(6, static_cast<off_t>(pos4));
602 ASSERT_EQ(10, static_cast<off_t>(pos5));
603 #endif
604
605 // Exercise back and forth movements of the position.
606 ASSERT_EQ(0, fsetpos(fp, &pos2));
607 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp)));
608 ASSERT_EQ(0, fsetpos(fp, &pos1));
609 ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fgetwc(fp)));
610 ASSERT_EQ(0, fsetpos(fp, &pos4));
611 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fgetwc(fp)));
612 ASSERT_EQ(0, fsetpos(fp, &pos3));
613 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fgetwc(fp)));
614 ASSERT_EQ(0, fsetpos(fp, &pos5));
615 ASSERT_EQ(WEOF, fgetwc(fp));
616
617 fclose(fp);
618 }
619
620 // Exercise the interaction between fpos and seek.
TEST(stdio,fpos_t_and_seek)621 TEST(stdio, fpos_t_and_seek) {
622 ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
623 uselocale(LC_GLOBAL_LOCALE);
624
625 // In glibc-2.16 fseek doesn't work properly in wide mode
626 // (https://sourceware.org/bugzilla/show_bug.cgi?id=14543). One workaround is
627 // to close and re-open the file. We do it in order to make the test pass
628 // with all glibcs.
629
630 TemporaryFile tf;
631 FILE* fp = fdopen(tf.fd, "w+");
632 ASSERT_TRUE(fp != NULL);
633
634 wchar_t mb_two_bytes = 0x00a2;
635 wchar_t mb_three_bytes = 0x20ac;
636 wchar_t mb_four_bytes = 0x24b62;
637
638 // Write to file.
639 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fputwc(mb_two_bytes, fp)));
640 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fputwc(mb_three_bytes, fp)));
641 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fputwc(mb_four_bytes, fp)));
642
643 fflush(fp);
644 fclose(fp);
645
646 fp = fopen(tf.filename, "r");
647 ASSERT_TRUE(fp != NULL);
648
649 // Store a valid position.
650 fpos_t mb_two_bytes_pos;
651 ASSERT_EQ(0, fgetpos(fp, &mb_two_bytes_pos));
652
653 // Move inside mb_four_bytes with fseek.
654 long offset_inside_mb = 6;
655 ASSERT_EQ(0, fseek(fp, offset_inside_mb, SEEK_SET));
656
657 // Store the "inside multi byte" position.
658 fpos_t pos_inside_mb;
659 ASSERT_EQ(0, fgetpos(fp, &pos_inside_mb));
660 #if defined(__BIONIC__)
661 ASSERT_EQ(offset_inside_mb, static_cast<off_t>(pos_inside_mb));
662 #endif
663
664 // Reading from within a byte should produce an error.
665 ASSERT_EQ(WEOF, fgetwc(fp));
666 ASSERT_EQ(EILSEQ, errno);
667
668 // Reverting to a valid position should work.
669 ASSERT_EQ(0, fsetpos(fp, &mb_two_bytes_pos));
670 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp)));
671
672 // Moving withing a multi byte with fsetpos should work but reading should
673 // produce an error.
674 ASSERT_EQ(0, fsetpos(fp, &pos_inside_mb));
675 ASSERT_EQ(WEOF, fgetwc(fp));
676 ASSERT_EQ(EILSEQ, errno);
677
678 fclose(fp);
679 }
680