1 // Copyright 2008, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 // 30 // Author: wan (at) google.com (Zhanyong Wan) 31 32 #include <gtest/internal/gtest-port.h> 33 34 #include <limits.h> 35 #include <stdlib.h> 36 #include <stdio.h> 37 38 #if GTEST_OS_WINDOWS_MOBILE 39 #include <windows.h> // For TerminateProcess() 40 #elif GTEST_OS_WINDOWS 41 #include <io.h> 42 #include <sys/stat.h> 43 #else 44 #include <unistd.h> 45 #endif // GTEST_OS_WINDOWS_MOBILE 46 47 #if GTEST_OS_MAC 48 #include <mach/mach_init.h> 49 #include <mach/task.h> 50 #include <mach/vm_map.h> 51 #endif // GTEST_OS_MAC 52 53 #include <gtest/gtest-spi.h> 54 #include <gtest/gtest-message.h> 55 #include <gtest/internal/gtest-string.h> 56 57 // Indicates that this translation unit is part of Google Test's 58 // implementation. It must come before gtest-internal-inl.h is 59 // included, or there will be a compiler error. This trick is to 60 // prevent a user from accidentally including gtest-internal-inl.h in 61 // his code. 62 #define GTEST_IMPLEMENTATION_ 1 63 #include "src/gtest-internal-inl.h" 64 #undef GTEST_IMPLEMENTATION_ 65 66 namespace testing { 67 namespace internal { 68 69 #if defined(_MSC_VER) || defined(__BORLANDC__) 70 // MSVC and C++Builder do not provide a definition of STDERR_FILENO. 71 const int kStdOutFileno = 1; 72 const int kStdErrFileno = 2; 73 #else 74 const int kStdOutFileno = STDOUT_FILENO; 75 const int kStdErrFileno = STDERR_FILENO; 76 #endif // _MSC_VER 77 78 #if GTEST_OS_MAC 79 80 // Returns the number of threads running in the process, or 0 to indicate that 81 // we cannot detect it. 82 size_t GetThreadCount() { 83 const task_t task = mach_task_self(); 84 mach_msg_type_number_t thread_count; 85 thread_act_array_t thread_list; 86 const kern_return_t status = task_threads(task, &thread_list, &thread_count); 87 if (status == KERN_SUCCESS) { 88 // task_threads allocates resources in thread_list and we need to free them 89 // to avoid leaks. 90 vm_deallocate(task, 91 reinterpret_cast<vm_address_t>(thread_list), 92 sizeof(thread_t) * thread_count); 93 return static_cast<size_t>(thread_count); 94 } else { 95 return 0; 96 } 97 } 98 99 #else 100 101 size_t GetThreadCount() { 102 // There's no portable way to detect the number of threads, so we just 103 // return 0 to indicate that we cannot detect it. 104 return 0; 105 } 106 107 #endif // GTEST_OS_MAC 108 109 #if GTEST_USES_POSIX_RE 110 111 // Implements RE. Currently only needed for death tests. 112 113 RE::~RE() { 114 if (is_valid_) { 115 // regfree'ing an invalid regex might crash because the content 116 // of the regex is undefined. Since the regex's are essentially 117 // the same, one cannot be valid (or invalid) without the other 118 // being so too. 119 regfree(&partial_regex_); 120 regfree(&full_regex_); 121 } 122 free(const_cast<char*>(pattern_)); 123 } 124 125 // Returns true iff regular expression re matches the entire str. 126 bool RE::FullMatch(const char* str, const RE& re) { 127 if (!re.is_valid_) return false; 128 129 regmatch_t match; 130 return regexec(&re.full_regex_, str, 1, &match, 0) == 0; 131 } 132 133 // Returns true iff regular expression re matches a substring of str 134 // (including str itself). 135 bool RE::PartialMatch(const char* str, const RE& re) { 136 if (!re.is_valid_) return false; 137 138 regmatch_t match; 139 return regexec(&re.partial_regex_, str, 1, &match, 0) == 0; 140 } 141 142 // Initializes an RE from its string representation. 143 void RE::Init(const char* regex) { 144 pattern_ = posix::StrDup(regex); 145 146 // Reserves enough bytes to hold the regular expression used for a 147 // full match. 148 const size_t full_regex_len = strlen(regex) + 10; 149 char* const full_pattern = new char[full_regex_len]; 150 151 snprintf(full_pattern, full_regex_len, "^(%s)$", regex); 152 is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0; 153 // We want to call regcomp(&partial_regex_, ...) even if the 154 // previous expression returns false. Otherwise partial_regex_ may 155 // not be properly initialized can may cause trouble when it's 156 // freed. 157 // 158 // Some implementation of POSIX regex (e.g. on at least some 159 // versions of Cygwin) doesn't accept the empty string as a valid 160 // regex. We change it to an equivalent form "()" to be safe. 161 if (is_valid_) { 162 const char* const partial_regex = (*regex == '\0') ? "()" : regex; 163 is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0; 164 } 165 EXPECT_TRUE(is_valid_) 166 << "Regular expression \"" << regex 167 << "\" is not a valid POSIX Extended regular expression."; 168 169 delete[] full_pattern; 170 } 171 172 #elif GTEST_USES_SIMPLE_RE 173 174 // Returns true iff ch appears anywhere in str (excluding the 175 // terminating '\0' character). 176 bool IsInSet(char ch, const char* str) { 177 return ch != '\0' && strchr(str, ch) != NULL; 178 } 179 180 // Returns true iff ch belongs to the given classification. Unlike 181 // similar functions in <ctype.h>, these aren't affected by the 182 // current locale. 183 bool IsDigit(char ch) { return '0' <= ch && ch <= '9'; } 184 bool IsPunct(char ch) { 185 return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~"); 186 } 187 bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); } 188 bool IsWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); } 189 bool IsWordChar(char ch) { 190 return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') || 191 ('0' <= ch && ch <= '9') || ch == '_'; 192 } 193 194 // Returns true iff "\\c" is a supported escape sequence. 195 bool IsValidEscape(char c) { 196 return (IsPunct(c) || IsInSet(c, "dDfnrsStvwW")); 197 } 198 199 // Returns true iff the given atom (specified by escaped and pattern) 200 // matches ch. The result is undefined if the atom is invalid. 201 bool AtomMatchesChar(bool escaped, char pattern_char, char ch) { 202 if (escaped) { // "\\p" where p is pattern_char. 203 switch (pattern_char) { 204 case 'd': return IsDigit(ch); 205 case 'D': return !IsDigit(ch); 206 case 'f': return ch == '\f'; 207 case 'n': return ch == '\n'; 208 case 'r': return ch == '\r'; 209 case 's': return IsWhiteSpace(ch); 210 case 'S': return !IsWhiteSpace(ch); 211 case 't': return ch == '\t'; 212 case 'v': return ch == '\v'; 213 case 'w': return IsWordChar(ch); 214 case 'W': return !IsWordChar(ch); 215 } 216 return IsPunct(pattern_char) && pattern_char == ch; 217 } 218 219 return (pattern_char == '.' && ch != '\n') || pattern_char == ch; 220 } 221 222 // Helper function used by ValidateRegex() to format error messages. 223 String FormatRegexSyntaxError(const char* regex, int index) { 224 return (Message() << "Syntax error at index " << index 225 << " in simple regular expression \"" << regex << "\": ").GetString(); 226 } 227 228 // Generates non-fatal failures and returns false if regex is invalid; 229 // otherwise returns true. 230 bool ValidateRegex(const char* regex) { 231 if (regex == NULL) { 232 // TODO(wan (at) google.com): fix the source file location in the 233 // assertion failures to match where the regex is used in user 234 // code. 235 ADD_FAILURE() << "NULL is not a valid simple regular expression."; 236 return false; 237 } 238 239 bool is_valid = true; 240 241 // True iff ?, *, or + can follow the previous atom. 242 bool prev_repeatable = false; 243 for (int i = 0; regex[i]; i++) { 244 if (regex[i] == '\\') { // An escape sequence 245 i++; 246 if (regex[i] == '\0') { 247 ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1) 248 << "'\\' cannot appear at the end."; 249 return false; 250 } 251 252 if (!IsValidEscape(regex[i])) { 253 ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1) 254 << "invalid escape sequence \"\\" << regex[i] << "\"."; 255 is_valid = false; 256 } 257 prev_repeatable = true; 258 } else { // Not an escape sequence. 259 const char ch = regex[i]; 260 261 if (ch == '^' && i > 0) { 262 ADD_FAILURE() << FormatRegexSyntaxError(regex, i) 263 << "'^' can only appear at the beginning."; 264 is_valid = false; 265 } else if (ch == '$' && regex[i + 1] != '\0') { 266 ADD_FAILURE() << FormatRegexSyntaxError(regex, i) 267 << "'$' can only appear at the end."; 268 is_valid = false; 269 } else if (IsInSet(ch, "()[]{}|")) { 270 ADD_FAILURE() << FormatRegexSyntaxError(regex, i) 271 << "'" << ch << "' is unsupported."; 272 is_valid = false; 273 } else if (IsRepeat(ch) && !prev_repeatable) { 274 ADD_FAILURE() << FormatRegexSyntaxError(regex, i) 275 << "'" << ch << "' can only follow a repeatable token."; 276 is_valid = false; 277 } 278 279 prev_repeatable = !IsInSet(ch, "^$?*+"); 280 } 281 } 282 283 return is_valid; 284 } 285 286 // Matches a repeated regex atom followed by a valid simple regular 287 // expression. The regex atom is defined as c if escaped is false, 288 // or \c otherwise. repeat is the repetition meta character (?, *, 289 // or +). The behavior is undefined if str contains too many 290 // characters to be indexable by size_t, in which case the test will 291 // probably time out anyway. We are fine with this limitation as 292 // std::string has it too. 293 bool MatchRepetitionAndRegexAtHead( 294 bool escaped, char c, char repeat, const char* regex, 295 const char* str) { 296 const size_t min_count = (repeat == '+') ? 1 : 0; 297 const size_t max_count = (repeat == '?') ? 1 : 298 static_cast<size_t>(-1) - 1; 299 // We cannot call numeric_limits::max() as it conflicts with the 300 // max() macro on Windows. 301 302 for (size_t i = 0; i <= max_count; ++i) { 303 // We know that the atom matches each of the first i characters in str. 304 if (i >= min_count && MatchRegexAtHead(regex, str + i)) { 305 // We have enough matches at the head, and the tail matches too. 306 // Since we only care about *whether* the pattern matches str 307 // (as opposed to *how* it matches), there is no need to find a 308 // greedy match. 309 return true; 310 } 311 if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i])) 312 return false; 313 } 314 return false; 315 } 316 317 // Returns true iff regex matches a prefix of str. regex must be a 318 // valid simple regular expression and not start with "^", or the 319 // result is undefined. 320 bool MatchRegexAtHead(const char* regex, const char* str) { 321 if (*regex == '\0') // An empty regex matches a prefix of anything. 322 return true; 323 324 // "$" only matches the end of a string. Note that regex being 325 // valid guarantees that there's nothing after "$" in it. 326 if (*regex == '$') 327 return *str == '\0'; 328 329 // Is the first thing in regex an escape sequence? 330 const bool escaped = *regex == '\\'; 331 if (escaped) 332 ++regex; 333 if (IsRepeat(regex[1])) { 334 // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so 335 // here's an indirect recursion. It terminates as the regex gets 336 // shorter in each recursion. 337 return MatchRepetitionAndRegexAtHead( 338 escaped, regex[0], regex[1], regex + 2, str); 339 } else { 340 // regex isn't empty, isn't "$", and doesn't start with a 341 // repetition. We match the first atom of regex with the first 342 // character of str and recurse. 343 return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) && 344 MatchRegexAtHead(regex + 1, str + 1); 345 } 346 } 347 348 // Returns true iff regex matches any substring of str. regex must be 349 // a valid simple regular expression, or the result is undefined. 350 // 351 // The algorithm is recursive, but the recursion depth doesn't exceed 352 // the regex length, so we won't need to worry about running out of 353 // stack space normally. In rare cases the time complexity can be 354 // exponential with respect to the regex length + the string length, 355 // but usually it's must faster (often close to linear). 356 bool MatchRegexAnywhere(const char* regex, const char* str) { 357 if (regex == NULL || str == NULL) 358 return false; 359 360 if (*regex == '^') 361 return MatchRegexAtHead(regex + 1, str); 362 363 // A successful match can be anywhere in str. 364 do { 365 if (MatchRegexAtHead(regex, str)) 366 return true; 367 } while (*str++ != '\0'); 368 return false; 369 } 370 371 // Implements the RE class. 372 373 RE::~RE() { 374 free(const_cast<char*>(pattern_)); 375 free(const_cast<char*>(full_pattern_)); 376 } 377 378 // Returns true iff regular expression re matches the entire str. 379 bool RE::FullMatch(const char* str, const RE& re) { 380 return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str); 381 } 382 383 // Returns true iff regular expression re matches a substring of str 384 // (including str itself). 385 bool RE::PartialMatch(const char* str, const RE& re) { 386 return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str); 387 } 388 389 // Initializes an RE from its string representation. 390 void RE::Init(const char* regex) { 391 pattern_ = full_pattern_ = NULL; 392 if (regex != NULL) { 393 pattern_ = posix::StrDup(regex); 394 } 395 396 is_valid_ = ValidateRegex(regex); 397 if (!is_valid_) { 398 // No need to calculate the full pattern when the regex is invalid. 399 return; 400 } 401 402 const size_t len = strlen(regex); 403 // Reserves enough bytes to hold the regular expression used for a 404 // full match: we need space to prepend a '^', append a '$', and 405 // terminate the string with '\0'. 406 char* buffer = static_cast<char*>(malloc(len + 3)); 407 full_pattern_ = buffer; 408 409 if (*regex != '^') 410 *buffer++ = '^'; // Makes sure full_pattern_ starts with '^'. 411 412 // We don't use snprintf or strncpy, as they trigger a warning when 413 // compiled with VC++ 8.0. 414 memcpy(buffer, regex, len); 415 buffer += len; 416 417 if (len == 0 || regex[len - 1] != '$') 418 *buffer++ = '$'; // Makes sure full_pattern_ ends with '$'. 419 420 *buffer = '\0'; 421 } 422 423 #endif // GTEST_USES_POSIX_RE 424 425 426 GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line) 427 : severity_(severity) { 428 const char* const marker = 429 severity == GTEST_INFO ? "[ INFO ]" : 430 severity == GTEST_WARNING ? "[WARNING]" : 431 severity == GTEST_ERROR ? "[ ERROR ]" : "[ FATAL ]"; 432 GetStream() << ::std::endl << marker << " " 433 << FormatFileLocation(file, line).c_str() << ": "; 434 } 435 436 // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program. 437 GTestLog::~GTestLog() { 438 GetStream() << ::std::endl; 439 if (severity_ == GTEST_FATAL) { 440 fflush(stderr); 441 posix::Abort(); 442 } 443 } 444 // Disable Microsoft deprecation warnings for POSIX functions called from 445 // this class (creat, dup, dup2, and close) 446 #ifdef _MSC_VER 447 #pragma warning(push) 448 #pragma warning(disable: 4996) 449 #endif // _MSC_VER 450 451 #if GTEST_HAS_STREAM_REDIRECTION_ 452 453 // Object that captures an output stream (stdout/stderr). 454 class CapturedStream { 455 public: 456 // The ctor redirects the stream to a temporary file. 457 CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) { 458 #if GTEST_OS_WINDOWS 459 char temp_dir_path[MAX_PATH + 1] = { '\0' }; // NOLINT 460 char temp_file_path[MAX_PATH + 1] = { '\0' }; // NOLINT 461 462 ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path); 463 const UINT success = ::GetTempFileNameA(temp_dir_path, 464 "gtest_redir", 465 0, // Generate unique file name. 466 temp_file_path); 467 GTEST_CHECK_(success != 0) 468 << "Unable to create a temporary file in " << temp_dir_path; 469 const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE); 470 GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file " 471 << temp_file_path; 472 filename_ = temp_file_path; 473 #else 474 // There's no guarantee that a test has write access to the 475 // current directory, so we create the temporary file in the /tmp 476 // directory instead. 477 char name_template[] = "/tmp/captured_stream.XXXXXX"; 478 const int captured_fd = mkstemp(name_template); 479 filename_ = name_template; 480 #endif // GTEST_OS_WINDOWS 481 fflush(NULL); 482 dup2(captured_fd, fd_); 483 close(captured_fd); 484 } 485 486 ~CapturedStream() { 487 remove(filename_.c_str()); 488 } 489 490 String GetCapturedString() { 491 if (uncaptured_fd_ != -1) { 492 // Restores the original stream. 493 fflush(NULL); 494 dup2(uncaptured_fd_, fd_); 495 close(uncaptured_fd_); 496 uncaptured_fd_ = -1; 497 } 498 499 FILE* const file = posix::FOpen(filename_.c_str(), "r"); 500 const String content = ReadEntireFile(file); 501 posix::FClose(file); 502 return content; 503 } 504 505 private: 506 // Reads the entire content of a file as a String. 507 static String ReadEntireFile(FILE* file); 508 509 // Returns the size (in bytes) of a file. 510 static size_t GetFileSize(FILE* file); 511 512 const int fd_; // A stream to capture. 513 int uncaptured_fd_; 514 // Name of the temporary file holding the stderr output. 515 ::std::string filename_; 516 517 GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream); 518 }; 519 520 // Returns the size (in bytes) of a file. 521 size_t CapturedStream::GetFileSize(FILE* file) { 522 fseek(file, 0, SEEK_END); 523 return static_cast<size_t>(ftell(file)); 524 } 525 526 // Reads the entire content of a file as a string. 527 String CapturedStream::ReadEntireFile(FILE* file) { 528 const size_t file_size = GetFileSize(file); 529 char* const buffer = new char[file_size]; 530 531 size_t bytes_last_read = 0; // # of bytes read in the last fread() 532 size_t bytes_read = 0; // # of bytes read so far 533 534 fseek(file, 0, SEEK_SET); 535 536 // Keeps reading the file until we cannot read further or the 537 // pre-determined file size is reached. 538 do { 539 bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file); 540 bytes_read += bytes_last_read; 541 } while (bytes_last_read > 0 && bytes_read < file_size); 542 543 const String content(buffer, bytes_read); 544 delete[] buffer; 545 546 return content; 547 } 548 549 #ifdef _MSC_VER 550 #pragma warning(pop) 551 #endif // _MSC_VER 552 553 static CapturedStream* g_captured_stderr = NULL; 554 static CapturedStream* g_captured_stdout = NULL; 555 556 // Starts capturing an output stream (stdout/stderr). 557 void CaptureStream(int fd, const char* stream_name, CapturedStream** stream) { 558 if (*stream != NULL) { 559 GTEST_LOG_(FATAL) << "Only one " << stream_name 560 << " capturer can exist at a time."; 561 } 562 *stream = new CapturedStream(fd); 563 } 564 565 // Stops capturing the output stream and returns the captured string. 566 String GetCapturedStream(CapturedStream** captured_stream) { 567 const String content = (*captured_stream)->GetCapturedString(); 568 569 delete *captured_stream; 570 *captured_stream = NULL; 571 572 return content; 573 } 574 575 // Starts capturing stdout. 576 void CaptureStdout() { 577 CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout); 578 } 579 580 // Starts capturing stderr. 581 void CaptureStderr() { 582 CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr); 583 } 584 585 // Stops capturing stdout and returns the captured string. 586 String GetCapturedStdout() { return GetCapturedStream(&g_captured_stdout); } 587 588 // Stops capturing stderr and returns the captured string. 589 String GetCapturedStderr() { return GetCapturedStream(&g_captured_stderr); } 590 591 #endif // GTEST_HAS_STREAM_REDIRECTION_ 592 593 #if GTEST_HAS_DEATH_TEST 594 595 // A copy of all command line arguments. Set by InitGoogleTest(). 596 ::std::vector<String> g_argvs; 597 598 // Returns the command line as a vector of strings. 599 const ::std::vector<String>& GetArgvs() { return g_argvs; } 600 601 #endif // GTEST_HAS_DEATH_TEST 602 603 #if GTEST_OS_WINDOWS_MOBILE 604 namespace posix { 605 void Abort() { 606 DebugBreak(); 607 TerminateProcess(GetCurrentProcess(), 1); 608 } 609 } // namespace posix 610 #endif // GTEST_OS_WINDOWS_MOBILE 611 612 // Returns the name of the environment variable corresponding to the 613 // given flag. For example, FlagToEnvVar("foo") will return 614 // "GTEST_FOO" in the open-source version. 615 static String FlagToEnvVar(const char* flag) { 616 const String full_flag = 617 (Message() << GTEST_FLAG_PREFIX_ << flag).GetString(); 618 619 Message env_var; 620 for (size_t i = 0; i != full_flag.length(); i++) { 621 env_var << static_cast<char>(toupper(full_flag.c_str()[i])); 622 } 623 624 return env_var.GetString(); 625 } 626 627 // Parses 'str' for a 32-bit signed integer. If successful, writes 628 // the result to *value and returns true; otherwise leaves *value 629 // unchanged and returns false. 630 bool ParseInt32(const Message& src_text, const char* str, Int32* value) { 631 // Parses the environment variable as a decimal integer. 632 char* end = NULL; 633 const long long_value = strtol(str, &end, 10); // NOLINT 634 635 // Has strtol() consumed all characters in the string? 636 if (*end != '\0') { 637 // No - an invalid character was encountered. 638 Message msg; 639 msg << "WARNING: " << src_text 640 << " is expected to be a 32-bit integer, but actually" 641 << " has value \"" << str << "\".\n"; 642 printf("%s", msg.GetString().c_str()); 643 fflush(stdout); 644 return false; 645 } 646 647 // Is the parsed value in the range of an Int32? 648 const Int32 result = static_cast<Int32>(long_value); 649 if (long_value == LONG_MAX || long_value == LONG_MIN || 650 // The parsed value overflows as a long. (strtol() returns 651 // LONG_MAX or LONG_MIN when the input overflows.) 652 result != long_value 653 // The parsed value overflows as an Int32. 654 ) { 655 Message msg; 656 msg << "WARNING: " << src_text 657 << " is expected to be a 32-bit integer, but actually" 658 << " has value " << str << ", which overflows.\n"; 659 printf("%s", msg.GetString().c_str()); 660 fflush(stdout); 661 return false; 662 } 663 664 *value = result; 665 return true; 666 } 667 668 // Reads and returns the Boolean environment variable corresponding to 669 // the given flag; if it's not set, returns default_value. 670 // 671 // The value is considered true iff it's not "0". 672 bool BoolFromGTestEnv(const char* flag, bool default_value) { 673 const String env_var = FlagToEnvVar(flag); 674 const char* const string_value = posix::GetEnv(env_var.c_str()); 675 return string_value == NULL ? 676 default_value : strcmp(string_value, "0") != 0; 677 } 678 679 // Reads and returns a 32-bit integer stored in the environment 680 // variable corresponding to the given flag; if it isn't set or 681 // doesn't represent a valid 32-bit integer, returns default_value. 682 Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) { 683 const String env_var = FlagToEnvVar(flag); 684 const char* const string_value = posix::GetEnv(env_var.c_str()); 685 if (string_value == NULL) { 686 // The environment variable is not set. 687 return default_value; 688 } 689 690 Int32 result = default_value; 691 if (!ParseInt32(Message() << "Environment variable " << env_var, 692 string_value, &result)) { 693 printf("The default value %s is used.\n", 694 (Message() << default_value).GetString().c_str()); 695 fflush(stdout); 696 return default_value; 697 } 698 699 return result; 700 } 701 702 // Reads and returns the string environment variable corresponding to 703 // the given flag; if it's not set, returns default_value. 704 const char* StringFromGTestEnv(const char* flag, const char* default_value) { 705 const String env_var = FlagToEnvVar(flag); 706 const char* const value = posix::GetEnv(env_var.c_str()); 707 return value == NULL ? default_value : value; 708 } 709 710 } // namespace internal 711 } // namespace testing 712