gtest-port.cc
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30 // Author: wan@google.com (Zhanyong Wan)
31 
33 
34 #include <limits.h>
35 #include <stdlib.h>
36 #include <stdio.h>
37 #include <string.h>
38 
39 #if GTEST_OS_WINDOWS_MOBILE
40 # include <windows.h> // For TerminateProcess()
41 #elif GTEST_OS_WINDOWS
42 # include <io.h>
43 # include <sys/stat.h>
44 #else
45 # include <unistd.h>
46 #endif // GTEST_OS_WINDOWS_MOBILE
47 
48 #if GTEST_OS_MAC
49 # include <mach/mach_init.h>
50 # include <mach/task.h>
51 # include <mach/vm_map.h>
52 #endif // GTEST_OS_MAC
53 
54 #if GTEST_OS_QNX
55 # include <devctl.h>
56 # include <sys/procfs.h>
57 #endif // GTEST_OS_QNX
58 
59 #include "gtest/gtest-spi.h"
60 #include "gtest/gtest-message.h"
63 
64 // Indicates that this translation unit is part of Google Test's
65 // implementation. It must come before gtest-internal-inl.h is
66 // included, or there will be a compiler error. This trick is to
67 // prevent a user from accidentally including gtest-internal-inl.h in
68 // his code.
69 #define GTEST_IMPLEMENTATION_ 1
70 #include "src/gtest-internal-inl.h"
71 #undef GTEST_IMPLEMENTATION_
72 
73 namespace testing {
74 namespace internal {
75 
76 #if defined(_MSC_VER) || defined(__BORLANDC__)
77 // MSVC and C++Builder do not provide a definition of STDERR_FILENO.
78 const int kStdOutFileno = 1;
79 const int kStdErrFileno = 2;
80 #else
81 const int kStdOutFileno = STDOUT_FILENO;
82 const int kStdErrFileno = STDERR_FILENO;
83 #endif // _MSC_VER
84 
85 #if GTEST_OS_MAC
86 
87 // Returns the number of threads running in the process, or 0 to indicate that
88 // we cannot detect it.
89 size_t GetThreadCount() {
90  const task_t task = mach_task_self();
91  mach_msg_type_number_t thread_count;
92  thread_act_array_t thread_list;
93  const kern_return_t status = task_threads(task, &thread_list, &thread_count);
94  if (status == KERN_SUCCESS) {
95  // task_threads allocates resources in thread_list and we need to free them
96  // to avoid leaks.
97  vm_deallocate(task,
98  reinterpret_cast<vm_address_t>(thread_list),
99  sizeof(thread_t) * thread_count);
100  return static_cast<size_t>(thread_count);
101  } else {
102  return 0;
103  }
104 }
105 
106 #elif GTEST_OS_QNX
107 
108 // Returns the number of threads running in the process, or 0 to indicate that
109 // we cannot detect it.
110 size_t GetThreadCount() {
111  const int fd = open("/proc/self/as", O_RDONLY);
112  if (fd < 0) {
113  return 0;
114  }
115  procfs_info process_info;
116  const int status =
117  devctl(fd, DCMD_PROC_INFO, &process_info, sizeof(process_info), NULL);
118  close(fd);
119  if (status == EOK) {
120  return static_cast<size_t>(process_info.num_threads);
121  } else {
122  return 0;
123  }
124 }
125 
126 #else
127 
128 size_t GetThreadCount() {
129  // There's no portable way to detect the number of threads, so we just
130  // return 0 to indicate that we cannot detect it.
131  return 0;
132 }
133 
134 #endif // GTEST_OS_MAC
135 
136 #if GTEST_USES_POSIX_RE
137 
138 // Implements RE. Currently only needed for death tests.
139 
140 RE::~RE() {
141  if (is_valid_) {
142  // regfree'ing an invalid regex might crash because the content
143  // of the regex is undefined. Since the regex's are essentially
144  // the same, one cannot be valid (or invalid) without the other
145  // being so too.
146  regfree(&partial_regex_);
147  regfree(&full_regex_);
148  }
149  free(const_cast<char*>(pattern_));
150 }
151 
152 // Returns true iff regular expression re matches the entire str.
153 bool RE::FullMatch(const char* str, const RE& re) {
154  if (!re.is_valid_) return false;
155 
156  regmatch_t match;
157  return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
158 }
159 
160 // Returns true iff regular expression re matches a substring of str
161 // (including str itself).
162 bool RE::PartialMatch(const char* str, const RE& re) {
163  if (!re.is_valid_) return false;
164 
165  regmatch_t match;
166  return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
167 }
168 
169 // Initializes an RE from its string representation.
170 void RE::Init(const char* regex) {
171  pattern_ = posix::StrDup(regex);
172 
173  // Reserves enough bytes to hold the regular expression used for a
174  // full match.
175  const size_t full_regex_len = strlen(regex) + 10;
176  char* const full_pattern = new char[full_regex_len];
177 
178  snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
179  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
180  // We want to call regcomp(&partial_regex_, ...) even if the
181  // previous expression returns false. Otherwise partial_regex_ may
182  // not be properly initialized can may cause trouble when it's
183  // freed.
184  //
185  // Some implementation of POSIX regex (e.g. on at least some
186  // versions of Cygwin) doesn't accept the empty string as a valid
187  // regex. We change it to an equivalent form "()" to be safe.
188  if (is_valid_) {
189  const char* const partial_regex = (*regex == '\0') ? "()" : regex;
190  is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
191  }
193  << "Regular expression \"" << regex
194  << "\" is not a valid POSIX Extended regular expression.";
195 
196  delete[] full_pattern;
197 }
198 
199 #elif GTEST_USES_SIMPLE_RE
200 
201 // Returns true iff ch appears anywhere in str (excluding the
202 // terminating '\0' character).
203 bool IsInSet(char ch, const char* str) {
204  return ch != '\0' && strchr(str, ch) != NULL;
205 }
206 
207 // Returns true iff ch belongs to the given classification. Unlike
208 // similar functions in <ctype.h>, these aren't affected by the
209 // current locale.
210 bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
211 bool IsAsciiPunct(char ch) {
212  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
213 }
214 bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
215 bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
216 bool IsAsciiWordChar(char ch) {
217  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
218  ('0' <= ch && ch <= '9') || ch == '_';
219 }
220 
221 // Returns true iff "\\c" is a supported escape sequence.
222 bool IsValidEscape(char c) {
223  return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
224 }
225 
226 // Returns true iff the given atom (specified by escaped and pattern)
227 // matches ch. The result is undefined if the atom is invalid.
228 bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
229  if (escaped) { // "\\p" where p is pattern_char.
230  switch (pattern_char) {
231  case 'd': return IsAsciiDigit(ch);
232  case 'D': return !IsAsciiDigit(ch);
233  case 'f': return ch == '\f';
234  case 'n': return ch == '\n';
235  case 'r': return ch == '\r';
236  case 's': return IsAsciiWhiteSpace(ch);
237  case 'S': return !IsAsciiWhiteSpace(ch);
238  case 't': return ch == '\t';
239  case 'v': return ch == '\v';
240  case 'w': return IsAsciiWordChar(ch);
241  case 'W': return !IsAsciiWordChar(ch);
242  }
243  return IsAsciiPunct(pattern_char) && pattern_char == ch;
244  }
245 
246  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
247 }
248 
249 // Helper function used by ValidateRegex() to format error messages.
250 std::string FormatRegexSyntaxError(const char* regex, int index) {
251  return (Message() << "Syntax error at index " << index
252  << " in simple regular expression \"" << regex << "\": ").GetString();
253 }
254 
255 // Generates non-fatal failures and returns false if regex is invalid;
256 // otherwise returns true.
257 bool ValidateRegex(const char* regex) {
258  if (regex == NULL) {
259  // TODO(wan@google.com): fix the source file location in the
260  // assertion failures to match where the regex is used in user
261  // code.
262  ADD_FAILURE() << "NULL is not a valid simple regular expression.";
263  return false;
264  }
265 
266  bool is_valid = true;
267 
268  // True iff ?, *, or + can follow the previous atom.
269  bool prev_repeatable = false;
270  for (int i = 0; regex[i]; i++) {
271  if (regex[i] == '\\') { // An escape sequence
272  i++;
273  if (regex[i] == '\0') {
274  ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
275  << "'\\' cannot appear at the end.";
276  return false;
277  }
278 
279  if (!IsValidEscape(regex[i])) {
280  ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
281  << "invalid escape sequence \"\\" << regex[i] << "\".";
282  is_valid = false;
283  }
284  prev_repeatable = true;
285  } else { // Not an escape sequence.
286  const char ch = regex[i];
287 
288  if (ch == '^' && i > 0) {
289  ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
290  << "'^' can only appear at the beginning.";
291  is_valid = false;
292  } else if (ch == '$' && regex[i + 1] != '\0') {
293  ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
294  << "'$' can only appear at the end.";
295  is_valid = false;
296  } else if (IsInSet(ch, "()[]{}|")) {
297  ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
298  << "'" << ch << "' is unsupported.";
299  is_valid = false;
300  } else if (IsRepeat(ch) && !prev_repeatable) {
301  ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
302  << "'" << ch << "' can only follow a repeatable token.";
303  is_valid = false;
304  }
305 
306  prev_repeatable = !IsInSet(ch, "^$?*+");
307  }
308  }
309 
310  return is_valid;
311 }
312 
313 // Matches a repeated regex atom followed by a valid simple regular
314 // expression. The regex atom is defined as c if escaped is false,
315 // or \c otherwise. repeat is the repetition meta character (?, *,
316 // or +). The behavior is undefined if str contains too many
317 // characters to be indexable by size_t, in which case the test will
318 // probably time out anyway. We are fine with this limitation as
319 // std::string has it too.
320 bool MatchRepetitionAndRegexAtHead(
321  bool escaped, char c, char repeat, const char* regex,
322  const char* str) {
323  const size_t min_count = (repeat == '+') ? 1 : 0;
324  const size_t max_count = (repeat == '?') ? 1 :
325  static_cast<size_t>(-1) - 1;
326  // We cannot call numeric_limits::max() as it conflicts with the
327  // max() macro on Windows.
328 
329  for (size_t i = 0; i <= max_count; ++i) {
330  // We know that the atom matches each of the first i characters in str.
331  if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
332  // We have enough matches at the head, and the tail matches too.
333  // Since we only care about *whether* the pattern matches str
334  // (as opposed to *how* it matches), there is no need to find a
335  // greedy match.
336  return true;
337  }
338  if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
339  return false;
340  }
341  return false;
342 }
343 
344 // Returns true iff regex matches a prefix of str. regex must be a
345 // valid simple regular expression and not start with "^", or the
346 // result is undefined.
347 bool MatchRegexAtHead(const char* regex, const char* str) {
348  if (*regex == '\0') // An empty regex matches a prefix of anything.
349  return true;
350 
351  // "$" only matches the end of a string. Note that regex being
352  // valid guarantees that there's nothing after "$" in it.
353  if (*regex == '$')
354  return *str == '\0';
355 
356  // Is the first thing in regex an escape sequence?
357  const bool escaped = *regex == '\\';
358  if (escaped)
359  ++regex;
360  if (IsRepeat(regex[1])) {
361  // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
362  // here's an indirect recursion. It terminates as the regex gets
363  // shorter in each recursion.
364  return MatchRepetitionAndRegexAtHead(
365  escaped, regex[0], regex[1], regex + 2, str);
366  } else {
367  // regex isn't empty, isn't "$", and doesn't start with a
368  // repetition. We match the first atom of regex with the first
369  // character of str and recurse.
370  return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
371  MatchRegexAtHead(regex + 1, str + 1);
372  }
373 }
374 
375 // Returns true iff regex matches any substring of str. regex must be
376 // a valid simple regular expression, or the result is undefined.
377 //
378 // The algorithm is recursive, but the recursion depth doesn't exceed
379 // the regex length, so we won't need to worry about running out of
380 // stack space normally. In rare cases the time complexity can be
381 // exponential with respect to the regex length + the string length,
382 // but usually it's must faster (often close to linear).
383 bool MatchRegexAnywhere(const char* regex, const char* str) {
384  if (regex == NULL || str == NULL)
385  return false;
386 
387  if (*regex == '^')
388  return MatchRegexAtHead(regex + 1, str);
389 
390  // A successful match can be anywhere in str.
391  do {
392  if (MatchRegexAtHead(regex, str))
393  return true;
394  } while (*str++ != '\0');
395  return false;
396 }
397 
398 // Implements the RE class.
399 
400 RE::~RE() {
401  free(const_cast<char*>(pattern_));
402  free(const_cast<char*>(full_pattern_));
403 }
404 
405 // Returns true iff regular expression re matches the entire str.
406 bool RE::FullMatch(const char* str, const RE& re) {
407  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
408 }
409 
410 // Returns true iff regular expression re matches a substring of str
411 // (including str itself).
412 bool RE::PartialMatch(const char* str, const RE& re) {
413  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
414 }
415 
416 // Initializes an RE from its string representation.
417 void RE::Init(const char* regex) {
418  pattern_ = full_pattern_ = NULL;
419  if (regex != NULL) {
420  pattern_ = posix::StrDup(regex);
421  }
422 
423  is_valid_ = ValidateRegex(regex);
424  if (!is_valid_) {
425  // No need to calculate the full pattern when the regex is invalid.
426  return;
427  }
428 
429  const size_t len = strlen(regex);
430  // Reserves enough bytes to hold the regular expression used for a
431  // full match: we need space to prepend a '^', append a '$', and
432  // terminate the string with '\0'.
433  char* buffer = static_cast<char*>(malloc(len + 3));
434  full_pattern_ = buffer;
435 
436  if (*regex != '^')
437  *buffer++ = '^'; // Makes sure full_pattern_ starts with '^'.
438 
439  // We don't use snprintf or strncpy, as they trigger a warning when
440  // compiled with VC++ 8.0.
441  memcpy(buffer, regex, len);
442  buffer += len;
443 
444  if (len == 0 || regex[len - 1] != '$')
445  *buffer++ = '$'; // Makes sure full_pattern_ ends with '$'.
446 
447  *buffer = '\0';
448 }
449 
450 #endif // GTEST_USES_POSIX_RE
451 
452 const char kUnknownFile[] = "unknown file";
453 
454 // Formats a source file path and a line number as they would appear
455 // in an error message from the compiler used to compile this code.
457  const std::string file_name(file == NULL ? kUnknownFile : file);
458 
459  if (line < 0) {
460  return file_name + ":";
461  }
462 #ifdef _MSC_VER
463  return file_name + "(" + StreamableToString(line) + "):";
464 #else
465  return file_name + ":" + StreamableToString(line) + ":";
466 #endif // _MSC_VER
467 }
468 
469 // Formats a file location for compiler-independent XML output.
470 // Although this function is not platform dependent, we put it next to
471 // FormatFileLocation in order to contrast the two functions.
472 // Note that FormatCompilerIndependentFileLocation() does NOT append colon
473 // to the file location it produces, unlike FormatFileLocation().
475  const char* file, int line) {
476  const std::string file_name(file == NULL ? kUnknownFile : file);
477 
478  if (line < 0)
479  return file_name;
480  else
481  return file_name + ":" + StreamableToString(line);
482 }
483 
484 
485 GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
486  : severity_(severity) {
487  const char* const marker =
488  severity == GTEST_INFO ? "[ INFO ]" :
489  severity == GTEST_WARNING ? "[WARNING]" :
490  severity == GTEST_ERROR ? "[ ERROR ]" : "[ FATAL ]";
491  GetStream() << ::std::endl << marker << " "
492  << FormatFileLocation(file, line).c_str() << ": ";
493 }
494 
495 // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
497  GetStream() << ::std::endl;
498  if (severity_ == GTEST_FATAL) {
499  fflush(stderr);
500  posix::Abort();
501  }
502 }
503 // Disable Microsoft deprecation warnings for POSIX functions called from
504 // this class (creat, dup, dup2, and close)
505 #ifdef _MSC_VER
506 # pragma warning(push)
507 # pragma warning(disable: 4996)
508 #endif // _MSC_VER
509 
510 #if GTEST_HAS_STREAM_REDIRECTION
511 
512 // Object that captures an output stream (stdout/stderr).
513 class CapturedStream {
514  public:
515  // The ctor redirects the stream to a temporary file.
516  explicit CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
517 # if GTEST_OS_WINDOWS
518  char temp_dir_path[MAX_PATH + 1] = { '\0' }; // NOLINT
519  char temp_file_path[MAX_PATH + 1] = { '\0' }; // NOLINT
520 
521  ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
522  const UINT success = ::GetTempFileNameA(temp_dir_path,
523  "gtest_redir",
524  0, // Generate unique file name.
525  temp_file_path);
526  GTEST_CHECK_(success != 0)
527  << "Unable to create a temporary file in " << temp_dir_path;
528  const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
529  GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
530  << temp_file_path;
531  filename_ = temp_file_path;
532 # else
533  // There's no guarantee that a test has write access to the current
534  // directory, so we create the temporary file in the /tmp directory
535  // instead. We use /tmp on most systems, and /sdcard on Android.
536  // That's because Android doesn't have /tmp.
537 # if GTEST_OS_LINUX_ANDROID
538  // Note: Android applications are expected to call the framework's
539  // Context.getExternalStorageDirectory() method through JNI to get
540  // the location of the world-writable SD Card directory. However,
541  // this requires a Context handle, which cannot be retrieved
542  // globally from native code. Doing so also precludes running the
543  // code as part of a regular standalone executable, which doesn't
544  // run in a Dalvik process (e.g. when running it through 'adb shell').
545  //
546  // The location /sdcard is directly accessible from native code
547  // and is the only location (unofficially) supported by the Android
548  // team. It's generally a symlink to the real SD Card mount point
549  // which can be /mnt/sdcard, /mnt/sdcard0, /system/media/sdcard, or
550  // other OEM-customized locations. Never rely on these, and always
551  // use /sdcard.
552  char name_template[] = "/sdcard/gtest_captured_stream.XXXXXX";
553 # else
554  char name_template[] = "/tmp/captured_stream.XXXXXX";
555 # endif // GTEST_OS_LINUX_ANDROID
556  const int captured_fd = mkstemp(name_template);
557  filename_ = name_template;
558 # endif // GTEST_OS_WINDOWS
559  fflush(NULL);
560  dup2(captured_fd, fd_);
561  close(captured_fd);
562  }
563 
564  ~CapturedStream() {
565  remove(filename_.c_str());
566  }
567 
568  std::string GetCapturedString() {
569  if (uncaptured_fd_ != -1) {
570  // Restores the original stream.
571  fflush(NULL);
572  dup2(uncaptured_fd_, fd_);
573  close(uncaptured_fd_);
574  uncaptured_fd_ = -1;
575  }
576 
577  FILE* const file = posix::FOpen(filename_.c_str(), "r");
578  const std::string content = ReadEntireFile(file);
579  posix::FClose(file);
580  return content;
581  }
582 
583  private:
584  // Reads the entire content of a file as an std::string.
585  static std::string ReadEntireFile(FILE* file);
586 
587  // Returns the size (in bytes) of a file.
588  static size_t GetFileSize(FILE* file);
589 
590  const int fd_; // A stream to capture.
591  int uncaptured_fd_;
592  // Name of the temporary file holding the stderr output.
593  ::std::string filename_;
594 
595  GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
596 };
597 
598 // Returns the size (in bytes) of a file.
599 size_t CapturedStream::GetFileSize(FILE* file) {
600  fseek(file, 0, SEEK_END);
601  return static_cast<size_t>(ftell(file));
602 }
603 
604 // Reads the entire content of a file as a string.
605 std::string CapturedStream::ReadEntireFile(FILE* file) {
606  const size_t file_size = GetFileSize(file);
607  char* const buffer = new char[file_size];
608 
609  size_t bytes_last_read = 0; // # of bytes read in the last fread()
610  size_t bytes_read = 0; // # of bytes read so far
611 
612  fseek(file, 0, SEEK_SET);
613 
614  // Keeps reading the file until we cannot read further or the
615  // pre-determined file size is reached.
616  do {
617  bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
618  bytes_read += bytes_last_read;
619  } while (bytes_last_read > 0 && bytes_read < file_size);
620 
621  const std::string content(buffer, bytes_read);
622  delete[] buffer;
623 
624  return content;
625 }
626 
627 # ifdef _MSC_VER
628 # pragma warning(pop)
629 # endif // _MSC_VER
630 
631 static CapturedStream* g_captured_stderr = NULL;
632 static CapturedStream* g_captured_stdout = NULL;
633 
634 // Starts capturing an output stream (stdout/stderr).
635 void CaptureStream(int fd, const char* stream_name, CapturedStream** stream) {
636  if (*stream != NULL) {
637  GTEST_LOG_(FATAL) << "Only one " << stream_name
638  << " capturer can exist at a time.";
639  }
640  *stream = new CapturedStream(fd);
641 }
642 
643 // Stops capturing the output stream and returns the captured string.
644 std::string GetCapturedStream(CapturedStream** captured_stream) {
645  const std::string content = (*captured_stream)->GetCapturedString();
646 
647  delete *captured_stream;
648  *captured_stream = NULL;
649 
650  return content;
651 }
652 
653 // Starts capturing stdout.
654 void CaptureStdout() {
655  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
656 }
657 
658 // Starts capturing stderr.
659 void CaptureStderr() {
660  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
661 }
662 
663 // Stops capturing stdout and returns the captured string.
665  return GetCapturedStream(&g_captured_stdout);
666 }
667 
668 // Stops capturing stderr and returns the captured string.
670  return GetCapturedStream(&g_captured_stderr);
671 }
672 
673 #endif // GTEST_HAS_STREAM_REDIRECTION
674 
675 #if GTEST_HAS_DEATH_TEST
676 
677 // A copy of all command line arguments. Set by InitGoogleTest().
678 ::std::vector<testing::internal::string> g_argvs;
679 
680 static const ::std::vector<testing::internal::string>* g_injected_test_argvs =
681  NULL; // Owned.
682 
683 void SetInjectableArgvs(const ::std::vector<testing::internal::string>* argvs) {
684  if (g_injected_test_argvs != argvs)
685  delete g_injected_test_argvs;
686  g_injected_test_argvs = argvs;
687 }
688 
689 const ::std::vector<testing::internal::string>& GetInjectableArgvs() {
690  if (g_injected_test_argvs != NULL) {
691  return *g_injected_test_argvs;
692  }
693  return g_argvs;
694 }
695 #endif // GTEST_HAS_DEATH_TEST
696 
697 #if GTEST_OS_WINDOWS_MOBILE
698 namespace posix {
699 void Abort() {
700  DebugBreak();
701  TerminateProcess(GetCurrentProcess(), 1);
702 }
703 } // namespace posix
704 #endif // GTEST_OS_WINDOWS_MOBILE
705 
706 // Returns the name of the environment variable corresponding to the
707 // given flag. For example, FlagToEnvVar("foo") will return
708 // "GTEST_FOO" in the open-source version.
709 static std::string FlagToEnvVar(const char* flag) {
710  const std::string full_flag =
711  (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
712 
713  Message env_var;
714  for (size_t i = 0; i != full_flag.length(); i++) {
715  env_var << ToUpper(full_flag.c_str()[i]);
716  }
717 
718  return env_var.GetString();
719 }
720 
721 // Parses 'str' for a 32-bit signed integer. If successful, writes
722 // the result to *value and returns true; otherwise leaves *value
723 // unchanged and returns false.
724 bool ParseInt32(const Message& src_text, const char* str, Int32* value) {
725  // Parses the environment variable as a decimal integer.
726  char* end = NULL;
727  const long long_value = strtol(str, &end, 10); // NOLINT
728 
729  // Has strtol() consumed all characters in the string?
730  if (*end != '\0') {
731  // No - an invalid character was encountered.
732  Message msg;
733  msg << "WARNING: " << src_text
734  << " is expected to be a 32-bit integer, but actually"
735  << " has value \"" << str << "\".\n";
736  printf("%s", msg.GetString().c_str());
737  fflush(stdout);
738  return false;
739  }
740 
741  // Is the parsed value in the range of an Int32?
742  const Int32 result = static_cast<Int32>(long_value);
743  if (long_value == LONG_MAX || long_value == LONG_MIN ||
744  // The parsed value overflows as a long. (strtol() returns
745  // LONG_MAX or LONG_MIN when the input overflows.)
746  result != long_value
747  // The parsed value overflows as an Int32.
748  ) {
749  Message msg;
750  msg << "WARNING: " << src_text
751  << " is expected to be a 32-bit integer, but actually"
752  << " has value " << str << ", which overflows.\n";
753  printf("%s", msg.GetString().c_str());
754  fflush(stdout);
755  return false;
756  }
757 
758  *value = result;
759  return true;
760 }
761 
762 // Reads and returns the Boolean environment variable corresponding to
763 // the given flag; if it's not set, returns default_value.
764 //
765 // The value is considered true iff it's not "0".
766 bool BoolFromGTestEnv(const char* flag, bool default_value) {
767  const std::string env_var = FlagToEnvVar(flag);
768  const char* const string_value = posix::GetEnv(env_var.c_str());
769  return string_value == NULL ?
770  default_value : strcmp(string_value, "0") != 0;
771 }
772 
773 // Reads and returns a 32-bit integer stored in the environment
774 // variable corresponding to the given flag; if it isn't set or
775 // doesn't represent a valid 32-bit integer, returns default_value.
776 Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) {
777  const std::string env_var = FlagToEnvVar(flag);
778  const char* const string_value = posix::GetEnv(env_var.c_str());
779  if (string_value == NULL) {
780  // The environment variable is not set.
781  return default_value;
782  }
783 
784  Int32 result = default_value;
785  if (!ParseInt32(Message() << "Environment variable " << env_var,
786  string_value, &result)) {
787  printf("The default value %s is used.\n",
788  (Message() << default_value).GetString().c_str());
789  fflush(stdout);
790  return default_value;
791  }
792 
793  return result;
794 }
795 
796 // Reads and returns the string environment variable corresponding to
797 // the given flag; if it's not set, returns default_value.
798 const char* StringFromGTestEnv(const char* flag, const char* default_value) {
799  const std::string env_var = FlagToEnvVar(flag);
800  const char* const value = posix::GetEnv(env_var.c_str());
801  return value == NULL ? default_value : value;
802 }
803 
804 } // namespace internal
805 } // namespace testing
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autogenerated on Wed Feb 17 2021 03:40:07