An Overlay-based
Virtual Network Substrate
SpoVNet

source: gtest-1.7.0/src/gtest-port.cc @ 12775

Last change on this file since 12775 was 12746, checked in by hock@…, 6 years ago

integrated the Google Testing Framework (gtest)

and wrote an Hello World test, to ensure the framework is working..

File size: 26.8 KB
Line 
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@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#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"
61#include "gtest/internal/gtest-internal.h"
62#include "gtest/internal/gtest-string.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
73namespace testing {
74namespace internal {
75
76#if defined(_MSC_VER) || defined(__BORLANDC__)
77// MSVC and C++Builder do not provide a definition of STDERR_FILENO.
78const int kStdOutFileno = 1;
79const int kStdErrFileno = 2;
80#else
81const int kStdOutFileno = STDOUT_FILENO;
82const 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.
89size_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.
110size_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
128size_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
140RE::~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.
153bool 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).
162bool 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.
170void 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)$", regex);
179  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
180  // We want to call regcomp(&partial_regex_, ...) even if the
181  // previous expression returns false.  Otherwise partial_regex_ may
182  // not be properly initialized can may cause trouble when it's
183  // freed.
184  //
185  // Some implementation of POSIX regex (e.g. on at least some
186  // versions of Cygwin) doesn't accept the empty string as a valid
187  // regex.  We change it to an equivalent form "()" to be safe.
188  if (is_valid_) {
189    const char* const partial_regex = (*regex == '\0') ? "()" : regex;
190    is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
191  }
192  EXPECT_TRUE(is_valid_)
193      << "Regular expression \"" << regex
194      << "\" is not a valid POSIX Extended regular expression.";
195
196  delete[] full_pattern;
197}
198
199#elif GTEST_USES_SIMPLE_RE
200
201// Returns true iff ch appears anywhere in str (excluding the
202// terminating '\0' character).
203bool IsInSet(char ch, const char* str) {
204  return ch != '\0' && strchr(str, ch) != NULL;
205}
206
207// Returns true iff ch belongs to the given classification.  Unlike
208// similar functions in <ctype.h>, these aren't affected by the
209// current locale.
210bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
211bool IsAsciiPunct(char ch) {
212  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
213}
214bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
215bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
216bool 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.
222bool 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.
228bool 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.
250std::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.
257bool 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, "^$?*+");
307    }
308  }
309
310  return is_valid;
311}
312
313// Matches a repeated regex atom followed by a valid simple regular
314// expression.  The regex atom is defined as c if escaped is false,
315// or \c otherwise.  repeat is the repetition meta character (?, *,
316// or +).  The behavior is undefined if str contains too many
317// characters to be indexable by size_t, in which case the test will
318// probably time out anyway.  We are fine with this limitation as
319// std::string has it too.
320bool MatchRepetitionAndRegexAtHead(
321    bool escaped, char c, char repeat, const char* regex,
322    const char* str) {
323  const size_t min_count = (repeat == '+') ? 1 : 0;
324  const size_t max_count = (repeat == '?') ? 1 :
325      static_cast<size_t>(-1) - 1;
326  // We cannot call numeric_limits::max() as it conflicts with the
327  // max() macro on Windows.
328
329  for (size_t i = 0; i <= max_count; ++i) {
330    // We know that the atom matches each of the first i characters in str.
331    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
332      // We have enough matches at the head, and the tail matches too.
333      // Since we only care about *whether* the pattern matches str
334      // (as opposed to *how* it matches), there is no need to find a
335      // greedy match.
336      return true;
337    }
338    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
339      return false;
340  }
341  return false;
342}
343
344// Returns true iff regex matches a prefix of str.  regex must be a
345// valid simple regular expression and not start with "^", or the
346// result is undefined.
347bool MatchRegexAtHead(const char* regex, const char* str) {
348  if (*regex == '\0')  // An empty regex matches a prefix of anything.
349    return true;
350
351  // "$" 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).
383bool 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
400RE::~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.
406bool 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).
412bool 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.
417void 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
452const 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.
456GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
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().
474GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
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
485GTestLog::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.
496GTestLog::~GTestLog() {
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).
513class 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.
599size_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.
605std::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
631static CapturedStream* g_captured_stderr = NULL;
632static CapturedStream* g_captured_stdout = NULL;
633
634// Starts capturing an output stream (stdout/stderr).
635void 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.
644std::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.
654void CaptureStdout() {
655  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
656}
657
658// Starts capturing stderr.
659void CaptureStderr() {
660  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
661}
662
663// Stops capturing stdout and returns the captured string.
664std::string GetCapturedStdout() {
665  return GetCapturedStream(&g_captured_stdout);
666}
667
668// Stops capturing stderr and returns the captured string.
669std::string GetCapturedStderr() {
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
680static const ::std::vector<testing::internal::string>* g_injected_test_argvs =
681                                        NULL;  // Owned.
682
683void 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
689const ::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
698namespace posix {
699void 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.
709static 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.
724bool 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".
766bool 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.
776Int32 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.
798const 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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