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 "BionicDeathTest.h" 20 #include "math_data_test.h" 21 #include "TemporaryFile.h" 22 #include "utils.h" 23 24 #include <errno.h> 25 #include <fcntl.h> 26 #include <libgen.h> 27 #include <limits.h> 28 #include <math.h> 29 #include <pthread.h> 30 #include <stdint.h> 31 #include <stdlib.h> 32 #include <sys/types.h> 33 #include <sys/wait.h> 34 35 // The random number generator tests all set the seed, get four values, reset the seed and check 36 // that they get the first two values repeated, and then reset the seed and check two more values 37 // to rule out the possibility that we're just going round a cycle of four values. 38 // TODO: factor this out. 39 40 TEST(stdlib, drand48) { 41 srand48(0x01020304); 42 EXPECT_DOUBLE_EQ(0.65619299195623526, drand48()); 43 EXPECT_DOUBLE_EQ(0.18522597229772941, drand48()); 44 EXPECT_DOUBLE_EQ(0.42015087072844537, drand48()); 45 EXPECT_DOUBLE_EQ(0.061637783047395089, drand48()); 46 srand48(0x01020304); 47 EXPECT_DOUBLE_EQ(0.65619299195623526, drand48()); 48 EXPECT_DOUBLE_EQ(0.18522597229772941, drand48()); 49 srand48(0x01020304); 50 EXPECT_DOUBLE_EQ(0.65619299195623526, drand48()); 51 EXPECT_DOUBLE_EQ(0.18522597229772941, drand48()); 52 } 53 54 TEST(stdlib, erand48) { 55 const unsigned short seed[3] = { 0x330e, 0xabcd, 0x1234 }; 56 unsigned short xsubi[3]; 57 memcpy(xsubi, seed, sizeof(seed)); 58 EXPECT_DOUBLE_EQ(0.39646477376027534, erand48(xsubi)); 59 EXPECT_DOUBLE_EQ(0.84048536941142515, erand48(xsubi)); 60 EXPECT_DOUBLE_EQ(0.35333609724524351, erand48(xsubi)); 61 EXPECT_DOUBLE_EQ(0.44658343479654405, erand48(xsubi)); 62 memcpy(xsubi, seed, sizeof(seed)); 63 EXPECT_DOUBLE_EQ(0.39646477376027534, erand48(xsubi)); 64 EXPECT_DOUBLE_EQ(0.84048536941142515, erand48(xsubi)); 65 memcpy(xsubi, seed, sizeof(seed)); 66 EXPECT_DOUBLE_EQ(0.39646477376027534, erand48(xsubi)); 67 EXPECT_DOUBLE_EQ(0.84048536941142515, erand48(xsubi)); 68 } 69 70 TEST(stdlib, lcong48) { 71 unsigned short p[7] = { 0x0102, 0x0304, 0x0506, 0x0708, 0x090a, 0x0b0c, 0x0d0e }; 72 lcong48(p); 73 EXPECT_EQ(1531389981, lrand48()); 74 EXPECT_EQ(1598801533, lrand48()); 75 EXPECT_EQ(2080534853, lrand48()); 76 EXPECT_EQ(1102488897, lrand48()); 77 lcong48(p); 78 EXPECT_EQ(1531389981, lrand48()); 79 EXPECT_EQ(1598801533, lrand48()); 80 lcong48(p); 81 EXPECT_EQ(1531389981, lrand48()); 82 EXPECT_EQ(1598801533, lrand48()); 83 } 84 85 TEST(stdlib, lrand48) { 86 srand48(0x01020304); 87 EXPECT_EQ(1409163720, lrand48()); 88 EXPECT_EQ(397769746, lrand48()); 89 EXPECT_EQ(902267124, lrand48()); 90 EXPECT_EQ(132366131, lrand48()); 91 srand48(0x01020304); 92 EXPECT_EQ(1409163720, lrand48()); 93 EXPECT_EQ(397769746, lrand48()); 94 srand48(0x01020304); 95 EXPECT_EQ(1409163720, lrand48()); 96 EXPECT_EQ(397769746, lrand48()); 97 } 98 99 TEST(stdlib, random) { 100 srandom(0x01020304); 101 EXPECT_EQ(55436735, random()); 102 EXPECT_EQ(1399865117, random()); 103 EXPECT_EQ(2032643283, random()); 104 EXPECT_EQ(571329216, random()); 105 srandom(0x01020304); 106 EXPECT_EQ(55436735, random()); 107 EXPECT_EQ(1399865117, random()); 108 srandom(0x01020304); 109 EXPECT_EQ(55436735, random()); 110 EXPECT_EQ(1399865117, random()); 111 } 112 113 TEST(stdlib, rand) { 114 srand(0x01020304); 115 EXPECT_EQ(55436735, rand()); 116 EXPECT_EQ(1399865117, rand()); 117 EXPECT_EQ(2032643283, rand()); 118 EXPECT_EQ(571329216, rand()); 119 srand(0x01020304); 120 EXPECT_EQ(55436735, rand()); 121 EXPECT_EQ(1399865117, rand()); 122 srand(0x01020304); 123 EXPECT_EQ(55436735, rand()); 124 EXPECT_EQ(1399865117, rand()); 125 } 126 127 TEST(stdlib, mrand48) { 128 srand48(0x01020304); 129 EXPECT_EQ(-1476639856, mrand48()); 130 EXPECT_EQ(795539493, mrand48()); 131 EXPECT_EQ(1804534249, mrand48()); 132 EXPECT_EQ(264732262, mrand48()); 133 srand48(0x01020304); 134 EXPECT_EQ(-1476639856, mrand48()); 135 EXPECT_EQ(795539493, mrand48()); 136 srand48(0x01020304); 137 EXPECT_EQ(-1476639856, mrand48()); 138 EXPECT_EQ(795539493, mrand48()); 139 } 140 141 TEST(stdlib, posix_memalign) { 142 void* p; 143 144 ASSERT_EQ(0, posix_memalign(&p, 512, 128)); 145 ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(p) % 512); 146 free(p); 147 148 // Can't align to a non-power of 2. 149 ASSERT_EQ(EINVAL, posix_memalign(&p, 81, 128)); 150 } 151 152 TEST(stdlib, realpath__NULL_filename) { 153 errno = 0; 154 char* p = realpath(NULL, NULL); 155 ASSERT_TRUE(p == NULL); 156 ASSERT_EQ(EINVAL, errno); 157 } 158 159 TEST(stdlib, realpath__empty_filename) { 160 errno = 0; 161 char* p = realpath("", NULL); 162 ASSERT_TRUE(p == NULL); 163 ASSERT_EQ(ENOENT, errno); 164 } 165 166 TEST(stdlib, realpath__ENOENT) { 167 errno = 0; 168 char* p = realpath("/this/directory/path/almost/certainly/does/not/exist", NULL); 169 ASSERT_TRUE(p == NULL); 170 ASSERT_EQ(ENOENT, errno); 171 } 172 173 TEST(stdlib, realpath__component_after_non_directory) { 174 errno = 0; 175 char* p = realpath("/dev/null/.", NULL); 176 ASSERT_TRUE(p == NULL); 177 ASSERT_EQ(ENOTDIR, errno); 178 179 errno = 0; 180 p = realpath("/dev/null/..", NULL); 181 ASSERT_TRUE(p == NULL); 182 ASSERT_EQ(ENOTDIR, errno); 183 } 184 185 TEST(stdlib, realpath) { 186 // Get the name of this executable. 187 char executable_path[PATH_MAX]; 188 int rc = readlink("/proc/self/exe", executable_path, sizeof(executable_path)); 189 ASSERT_NE(rc, -1); 190 executable_path[rc] = '\0'; 191 192 char buf[PATH_MAX + 1]; 193 char* p = realpath("/proc/self/exe", buf); 194 ASSERT_STREQ(executable_path, p); 195 196 p = realpath("/proc/self/exe", NULL); 197 ASSERT_STREQ(executable_path, p); 198 free(p); 199 } 200 201 TEST(stdlib, qsort) { 202 struct s { 203 char name[16]; 204 static int comparator(const void* lhs, const void* rhs) { 205 return strcmp(reinterpret_cast<const s*>(lhs)->name, reinterpret_cast<const s*>(rhs)->name); 206 } 207 }; 208 s entries[3]; 209 strcpy(entries[0].name, "charlie"); 210 strcpy(entries[1].name, "bravo"); 211 strcpy(entries[2].name, "alpha"); 212 213 qsort(entries, 3, sizeof(s), s::comparator); 214 ASSERT_STREQ("alpha", entries[0].name); 215 ASSERT_STREQ("bravo", entries[1].name); 216 ASSERT_STREQ("charlie", entries[2].name); 217 218 qsort(entries, 3, sizeof(s), s::comparator); 219 ASSERT_STREQ("alpha", entries[0].name); 220 ASSERT_STREQ("bravo", entries[1].name); 221 ASSERT_STREQ("charlie", entries[2].name); 222 } 223 224 static void* TestBug57421_child(void* arg) { 225 pthread_t main_thread = reinterpret_cast<pthread_t>(arg); 226 pthread_join(main_thread, NULL); 227 char* value = getenv("ENVIRONMENT_VARIABLE"); 228 if (value == NULL) { 229 setenv("ENVIRONMENT_VARIABLE", "value", 1); 230 } 231 return NULL; 232 } 233 234 static void TestBug57421_main() { 235 pthread_t t; 236 ASSERT_EQ(0, pthread_create(&t, NULL, TestBug57421_child, reinterpret_cast<void*>(pthread_self()))); 237 pthread_exit(NULL); 238 } 239 240 // Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to 241 // run this test (which exits normally) in its own process. 242 243 class stdlib_DeathTest : public BionicDeathTest {}; 244 245 TEST_F(stdlib_DeathTest, getenv_after_main_thread_exits) { 246 // https://code.google.com/p/android/issues/detail?id=57421 247 ASSERT_EXIT(TestBug57421_main(), ::testing::ExitedWithCode(0), ""); 248 } 249 250 TEST(stdlib, mkostemp64) { 251 TemporaryFile tf([](char* path) { return mkostemp64(path, O_CLOEXEC); }); 252 int flags = fcntl(tf.fd, F_GETFD); 253 ASSERT_TRUE(flags != -1); 254 ASSERT_EQ(FD_CLOEXEC, flags & FD_CLOEXEC); 255 } 256 257 TEST(stdlib, mkostemp) { 258 TemporaryFile tf([](char* path) { return mkostemp(path, O_CLOEXEC); }); 259 int flags = fcntl(tf.fd, F_GETFD); 260 ASSERT_TRUE(flags != -1); 261 ASSERT_EQ(FD_CLOEXEC, flags & FD_CLOEXEC); 262 } 263 264 TEST(stdlib, mkstemp64) { 265 TemporaryFile tf(mkstemp64); 266 struct stat64 sb; 267 ASSERT_EQ(0, fstat64(tf.fd, &sb)); 268 ASSERT_EQ(O_LARGEFILE, fcntl(tf.fd, F_GETFL) & O_LARGEFILE); 269 } 270 271 TEST(stdlib, mkstemp) { 272 TemporaryFile tf; 273 struct stat sb; 274 ASSERT_EQ(0, fstat(tf.fd, &sb)); 275 } 276 277 TEST(stdlib, system) { 278 int status; 279 280 status = system("exit 0"); 281 ASSERT_TRUE(WIFEXITED(status)); 282 ASSERT_EQ(0, WEXITSTATUS(status)); 283 284 status = system("exit 1"); 285 ASSERT_TRUE(WIFEXITED(status)); 286 ASSERT_EQ(1, WEXITSTATUS(status)); 287 } 288 289 TEST(stdlib, atof) { 290 ASSERT_DOUBLE_EQ(1.23, atof("1.23")); 291 } 292 293 template <typename T> 294 static void CheckStrToFloat(T fn(const char* s, char** end)) { 295 FpUlpEq<0, T> pred; 296 297 EXPECT_PRED_FORMAT2(pred, 9.0, fn("9.0", nullptr)); 298 EXPECT_PRED_FORMAT2(pred, 9.0, fn("0.9e1", nullptr)); 299 EXPECT_PRED_FORMAT2(pred, 9.0, fn("0x1.2p3", nullptr)); 300 301 const char* s = " \t\v\f\r\n9.0"; 302 char* p; 303 EXPECT_PRED_FORMAT2(pred, 9.0, fn(s, &p)); 304 EXPECT_EQ(s + strlen(s), p); 305 306 EXPECT_TRUE(isnan(fn("+nan", nullptr))); 307 EXPECT_TRUE(isnan(fn("nan", nullptr))); 308 EXPECT_TRUE(isnan(fn("-nan", nullptr))); 309 310 EXPECT_TRUE(isnan(fn("+nan(0xff)", nullptr))); 311 EXPECT_TRUE(isnan(fn("nan(0xff)", nullptr))); 312 EXPECT_TRUE(isnan(fn("-nan(0xff)", nullptr))); 313 314 EXPECT_TRUE(isnan(fn("+nanny", &p))); 315 EXPECT_STREQ("ny", p); 316 EXPECT_TRUE(isnan(fn("nanny", &p))); 317 EXPECT_STREQ("ny", p); 318 EXPECT_TRUE(isnan(fn("-nanny", &p))); 319 EXPECT_STREQ("ny", p); 320 321 EXPECT_EQ(0, fn("muppet", &p)); 322 EXPECT_STREQ("muppet", p); 323 EXPECT_EQ(0, fn(" muppet", &p)); 324 EXPECT_STREQ(" muppet", p); 325 326 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("+inf", nullptr)); 327 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("inf", nullptr)); 328 EXPECT_EQ(-std::numeric_limits<T>::infinity(), fn("-inf", nullptr)); 329 330 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("+infinity", nullptr)); 331 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("infinity", nullptr)); 332 EXPECT_EQ(-std::numeric_limits<T>::infinity(), fn("-infinity", nullptr)); 333 334 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("+infinitude", &p)); 335 EXPECT_STREQ("initude", p); 336 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("infinitude", &p)); 337 EXPECT_STREQ("initude", p); 338 EXPECT_EQ(-std::numeric_limits<T>::infinity(), fn("-infinitude", &p)); 339 EXPECT_STREQ("initude", p); 340 341 // Check case-insensitivity. 342 EXPECT_EQ(std::numeric_limits<T>::infinity(), fn("InFiNiTy", nullptr)); 343 EXPECT_TRUE(isnan(fn("NaN", nullptr))); 344 } 345 346 TEST(stdlib, strtod) { 347 CheckStrToFloat(strtod); 348 } 349 350 TEST(stdlib, strtof) { 351 CheckStrToFloat(strtof); 352 } 353 354 TEST(stdlib, strtold) { 355 CheckStrToFloat(strtold); 356 } 357 358 TEST(stdlib, strtof_2206701) { 359 ASSERT_EQ(0.0f, strtof("7.0064923216240853546186479164495e-46", NULL)); 360 ASSERT_EQ(1.4e-45f, strtof("7.0064923216240853546186479164496e-46", NULL)); 361 } 362 363 TEST(stdlib, strtod_largest_subnormal) { 364 // This value has been known to cause javac and java to infinite loop. 365 // http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308/ 366 ASSERT_EQ(2.2250738585072014e-308, strtod("2.2250738585072012e-308", NULL)); 367 ASSERT_EQ(2.2250738585072014e-308, strtod("0.00022250738585072012e-304", NULL)); 368 ASSERT_EQ(2.2250738585072014e-308, strtod("00000002.2250738585072012e-308", NULL)); 369 ASSERT_EQ(2.2250738585072014e-308, strtod("2.225073858507201200000e-308", NULL)); 370 ASSERT_EQ(2.2250738585072014e-308, strtod("2.2250738585072012e-00308", NULL)); 371 ASSERT_EQ(2.2250738585072014e-308, strtod("2.22507385850720129978001e-308", NULL)); 372 ASSERT_EQ(-2.2250738585072014e-308, strtod("-2.2250738585072012e-308", NULL)); 373 } 374 375 TEST(stdlib, quick_exit) { 376 pid_t pid = fork(); 377 ASSERT_NE(-1, pid) << strerror(errno); 378 379 if (pid == 0) { 380 quick_exit(99); 381 } 382 383 AssertChildExited(pid, 99); 384 } 385 386 static int quick_exit_status = 0; 387 388 static void quick_exit_1(void) { 389 ASSERT_EQ(quick_exit_status, 0); 390 quick_exit_status = 1; 391 } 392 393 static void quick_exit_2(void) { 394 ASSERT_EQ(quick_exit_status, 1); 395 } 396 397 static void not_run(void) { 398 FAIL(); 399 } 400 401 TEST(stdlib, at_quick_exit) { 402 pid_t pid = fork(); 403 ASSERT_NE(-1, pid) << strerror(errno); 404 405 if (pid == 0) { 406 ASSERT_EQ(at_quick_exit(quick_exit_2), 0); 407 ASSERT_EQ(at_quick_exit(quick_exit_1), 0); 408 atexit(not_run); 409 quick_exit(99); 410 } 411 412 AssertChildExited(pid, 99); 413 } 414 415 TEST(unistd, _Exit) { 416 pid_t pid = fork(); 417 ASSERT_NE(-1, pid) << strerror(errno); 418 419 if (pid == 0) { 420 _Exit(99); 421 } 422 423 AssertChildExited(pid, 99); 424 } 425 426 TEST(stdlib, pty_smoke) { 427 // getpt returns a pty with O_RDWR|O_NOCTTY. 428 int fd = getpt(); 429 ASSERT_NE(-1, fd); 430 431 // grantpt is a no-op. 432 ASSERT_EQ(0, grantpt(fd)); 433 434 // ptsname_r should start "/dev/pts/". 435 char name_r[128]; 436 ASSERT_EQ(0, ptsname_r(fd, name_r, sizeof(name_r))); 437 name_r[9] = 0; 438 ASSERT_STREQ("/dev/pts/", name_r); 439 440 close(fd); 441 } 442 443 TEST(stdlib, posix_openpt) { 444 int fd = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC); 445 ASSERT_NE(-1, fd); 446 close(fd); 447 } 448 449 TEST(stdlib, ptsname_r_ENOTTY) { 450 errno = 0; 451 char buf[128]; 452 ASSERT_EQ(ENOTTY, ptsname_r(STDOUT_FILENO, buf, sizeof(buf))); 453 ASSERT_EQ(ENOTTY, errno); 454 } 455 456 TEST(stdlib, ptsname_r_EINVAL) { 457 int fd = getpt(); 458 ASSERT_NE(-1, fd); 459 errno = 0; 460 char* buf = NULL; 461 ASSERT_EQ(EINVAL, ptsname_r(fd, buf, 128)); 462 ASSERT_EQ(EINVAL, errno); 463 close(fd); 464 } 465 466 TEST(stdlib, ptsname_r_ERANGE) { 467 int fd = getpt(); 468 ASSERT_NE(-1, fd); 469 errno = 0; 470 char buf[1]; 471 ASSERT_EQ(ERANGE, ptsname_r(fd, buf, sizeof(buf))); 472 ASSERT_EQ(ERANGE, errno); 473 close(fd); 474 } 475 476 TEST(stdlib, ttyname_r) { 477 int fd = getpt(); 478 ASSERT_NE(-1, fd); 479 480 // ttyname_r returns "/dev/ptmx" for a pty. 481 char name_r[128]; 482 ASSERT_EQ(0, ttyname_r(fd, name_r, sizeof(name_r))); 483 ASSERT_STREQ("/dev/ptmx", name_r); 484 485 close(fd); 486 } 487 488 TEST(stdlib, ttyname_r_ENOTTY) { 489 int fd = open("/dev/null", O_WRONLY); 490 errno = 0; 491 char buf[128]; 492 ASSERT_EQ(ENOTTY, ttyname_r(fd, buf, sizeof(buf))); 493 ASSERT_EQ(ENOTTY, errno); 494 close(fd); 495 } 496 497 TEST(stdlib, ttyname_r_EINVAL) { 498 int fd = getpt(); 499 ASSERT_NE(-1, fd); 500 errno = 0; 501 char* buf = NULL; 502 ASSERT_EQ(EINVAL, ttyname_r(fd, buf, 128)); 503 ASSERT_EQ(EINVAL, errno); 504 close(fd); 505 } 506 507 TEST(stdlib, ttyname_r_ERANGE) { 508 int fd = getpt(); 509 ASSERT_NE(-1, fd); 510 errno = 0; 511 char buf[1]; 512 ASSERT_EQ(ERANGE, ttyname_r(fd, buf, sizeof(buf))); 513 ASSERT_EQ(ERANGE, errno); 514 close(fd); 515 } 516 517 TEST(stdlib, unlockpt_ENOTTY) { 518 int fd = open("/dev/null", O_WRONLY); 519 errno = 0; 520 ASSERT_EQ(-1, unlockpt(fd)); 521 ASSERT_EQ(ENOTTY, errno); 522 close(fd); 523 } 524 525 TEST(stdlib, strtol_EINVAL) { 526 errno = 0; 527 strtol("123", NULL, -1); 528 ASSERT_EQ(EINVAL, errno); 529 errno = 0; 530 strtol("123", NULL, 1); 531 ASSERT_EQ(EINVAL, errno); 532 errno = 0; 533 strtol("123", NULL, 37); 534 ASSERT_EQ(EINVAL, errno); 535 } 536 537 TEST(stdlib, strtoll_EINVAL) { 538 errno = 0; 539 strtoll("123", NULL, -1); 540 ASSERT_EQ(EINVAL, errno); 541 errno = 0; 542 strtoll("123", NULL, 1); 543 ASSERT_EQ(EINVAL, errno); 544 errno = 0; 545 strtoll("123", NULL, 37); 546 ASSERT_EQ(EINVAL, errno); 547 } 548 549 TEST(stdlib, strtoul_EINVAL) { 550 errno = 0; 551 strtoul("123", NULL, -1); 552 ASSERT_EQ(EINVAL, errno); 553 errno = 0; 554 strtoul("123", NULL, 1); 555 ASSERT_EQ(EINVAL, errno); 556 errno = 0; 557 strtoul("123", NULL, 37); 558 ASSERT_EQ(EINVAL, errno); 559 } 560 561 TEST(stdlib, strtoull_EINVAL) { 562 errno = 0; 563 strtoull("123", NULL, -1); 564 ASSERT_EQ(EINVAL, errno); 565 errno = 0; 566 strtoull("123", NULL, 1); 567 ASSERT_EQ(EINVAL, errno); 568 errno = 0; 569 strtoull("123", NULL, 37); 570 ASSERT_EQ(EINVAL, errno); 571 } 572 573 TEST(stdlib, getsubopt) { 574 char* const tokens[] = { 575 const_cast<char*>("a"), 576 const_cast<char*>("b"), 577 const_cast<char*>("foo"), 578 nullptr 579 }; 580 std::string input = "a,b,foo=bar,a,unknown"; 581 char* subopts = &input[0]; 582 char* value = nullptr; 583 584 ASSERT_EQ(0, getsubopt(&subopts, tokens, &value)); 585 ASSERT_EQ(nullptr, value); 586 ASSERT_EQ(1, getsubopt(&subopts, tokens, &value)); 587 ASSERT_EQ(nullptr, value); 588 ASSERT_EQ(2, getsubopt(&subopts, tokens, &value)); 589 ASSERT_STREQ("bar", value); 590 ASSERT_EQ(0, getsubopt(&subopts, tokens, &value)); 591 ASSERT_EQ(nullptr, value); 592 593 ASSERT_EQ(-1, getsubopt(&subopts, tokens, &value)); 594 } 595 596 TEST(stdlib, mblen) { 597 // "If s is a null pointer, mblen() shall return a non-zero or 0 value, if character encodings, 598 // respectively, do or do not have state-dependent encodings." We're always UTF-8. 599 EXPECT_EQ(0, mblen(nullptr, 1)); 600 601 ASSERT_STREQ("C.UTF-8", setlocale(LC_ALL, "C.UTF-8")); 602 603 // 1-byte UTF-8. 604 EXPECT_EQ(1, mblen("abcdef", 6)); 605 // 2-byte UTF-8. 606 EXPECT_EQ(2, mblen("\xc2\xa2" "cdef", 6)); 607 // 3-byte UTF-8. 608 EXPECT_EQ(3, mblen("\xe2\x82\xac" "def", 6)); 609 // 4-byte UTF-8. 610 EXPECT_EQ(4, mblen("\xf0\xa4\xad\xa2" "ef", 6)); 611 612 // Illegal over-long sequence. 613 ASSERT_EQ(-1, mblen("\xf0\x82\x82\xac" "ef", 6)); 614 615 // "mblen() shall ... return 0 (if s points to the null byte)". 616 EXPECT_EQ(0, mblen("", 1)); 617 } 618
