1 // Copyright 2008, Google Inc.
2 // All rights reserved.
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5 // modification, are permitted provided that the following conditions are
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
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.
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.
30 // Author: wan@google.com (Zhanyong Wan)
32 #include "gtest/internal/gtest-port.h"
39 #if GTEST_OS_WINDOWS_MOBILE
40 # include <windows.h> // For TerminateProcess()
41 #elif GTEST_OS_WINDOWS
43 # include <sys/stat.h>
46 #endif // GTEST_OS_WINDOWS_MOBILE
49 # include <mach/mach_init.h>
50 # include <mach/task.h>
51 # include <mach/vm_map.h>
52 #endif // GTEST_OS_MAC
54 #include "gtest/gtest-spi.h"
55 #include "gtest/gtest-message.h"
56 #include "gtest/internal/gtest-internal.h"
57 #include "gtest/internal/gtest-string.h"
59 // Indicates that this translation unit is part of Google Test's
60 // implementation. It must come before gtest-internal-inl.h is
61 // included, or there will be a compiler error. This trick is to
62 // prevent a user from accidentally including gtest-internal-inl.h in
64 #define GTEST_IMPLEMENTATION_ 1
65 #include "gtest/internal/gtest-internal-inl.h"
66 #undef GTEST_IMPLEMENTATION_
71 #if defined(_MSC_VER) || defined(__BORLANDC__)
72 // MSVC and C++Builder do not provide a definition of STDERR_FILENO.
73 const int kStdOutFileno
= 1;
74 const int kStdErrFileno
= 2;
76 const int kStdOutFileno
= STDOUT_FILENO
;
77 const int kStdErrFileno
= STDERR_FILENO
;
82 // Returns the number of threads running in the process, or 0 to indicate that
83 // we cannot detect it.
84 size_t GetThreadCount() {
85 const task_t task
= mach_task_self();
86 mach_msg_type_number_t thread_count
;
87 thread_act_array_t thread_list
;
88 const kern_return_t status
= task_threads(task
, &thread_list
, &thread_count
);
89 if (status
== KERN_SUCCESS
) {
90 // task_threads allocates resources in thread_list and we need to free them
93 reinterpret_cast<vm_address_t
>(thread_list
),
94 sizeof(thread_t
) * thread_count
);
95 return static_cast<size_t>(thread_count
);
103 size_t GetThreadCount() {
104 // There's no portable way to detect the number of threads, so we just
105 // return 0 to indicate that we cannot detect it.
109 #endif // GTEST_OS_MAC
111 #if GTEST_USES_POSIX_RE
113 // Implements RE. Currently only needed for death tests.
117 // regfree'ing an invalid regex might crash because the content
118 // of the regex is undefined. Since the regex's are essentially
119 // the same, one cannot be valid (or invalid) without the other
121 regfree(&partial_regex_
);
122 regfree(&full_regex_
);
124 free(const_cast<char*>(pattern_
));
127 // Returns true iff regular expression re matches the entire str.
128 bool RE::FullMatch(const char* str
, const RE
& re
) {
129 if (!re
.is_valid_
) return false;
132 return regexec(&re
.full_regex_
, str
, 1, &match
, 0) == 0;
135 // Returns true iff regular expression re matches a substring of str
136 // (including str itself).
137 bool RE::PartialMatch(const char* str
, const RE
& re
) {
138 if (!re
.is_valid_
) return false;
141 return regexec(&re
.partial_regex_
, str
, 1, &match
, 0) == 0;
144 // Initializes an RE from its string representation.
145 void RE::Init(const char* regex
) {
146 pattern_
= posix::StrDup(regex
);
148 // Reserves enough bytes to hold the regular expression used for a
150 const size_t full_regex_len
= strlen(regex
) + 10;
151 char* const full_pattern
= new char[full_regex_len
];
153 snprintf(full_pattern
, full_regex_len
, "^(%s)$", regex
);
154 is_valid_
= regcomp(&full_regex_
, full_pattern
, REG_EXTENDED
) == 0;
155 // We want to call regcomp(&partial_regex_, ...) even if the
156 // previous expression returns false. Otherwise partial_regex_ may
157 // not be properly initialized can may cause trouble when it's
160 // Some implementation of POSIX regex (e.g. on at least some
161 // versions of Cygwin) doesn't accept the empty string as a valid
162 // regex. We change it to an equivalent form "()" to be safe.
164 const char* const partial_regex
= (*regex
== '\0') ? "()" : regex
;
165 is_valid_
= regcomp(&partial_regex_
, partial_regex
, REG_EXTENDED
) == 0;
167 EXPECT_TRUE(is_valid_
)
168 << "Regular expression \"" << regex
169 << "\" is not a valid POSIX Extended regular expression.";
171 delete[] full_pattern
;
174 #elif GTEST_USES_SIMPLE_RE
176 // Returns true iff ch appears anywhere in str (excluding the
177 // terminating '\0' character).
178 bool IsInSet(char ch
, const char* str
) {
179 return ch
!= '\0' && strchr(str
, ch
) != NULL
;
182 // Returns true iff ch belongs to the given classification. Unlike
183 // similar functions in <ctype.h>, these aren't affected by the
185 bool IsAsciiDigit(char ch
) { return '0' <= ch
&& ch
<= '9'; }
186 bool IsAsciiPunct(char ch
) {
187 return IsInSet(ch
, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
189 bool IsRepeat(char ch
) { return IsInSet(ch
, "?*+"); }
190 bool IsAsciiWhiteSpace(char ch
) { return IsInSet(ch
, " \f\n\r\t\v"); }
191 bool IsAsciiWordChar(char ch
) {
192 return ('a' <= ch
&& ch
<= 'z') || ('A' <= ch
&& ch
<= 'Z') ||
193 ('0' <= ch
&& ch
<= '9') || ch
== '_';
196 // Returns true iff "\\c" is a supported escape sequence.
197 bool IsValidEscape(char c
) {
198 return (IsAsciiPunct(c
) || IsInSet(c
, "dDfnrsStvwW"));
201 // Returns true iff the given atom (specified by escaped and pattern)
202 // matches ch. The result is undefined if the atom is invalid.
203 bool AtomMatchesChar(bool escaped
, char pattern_char
, char ch
) {
204 if (escaped
) { // "\\p" where p is pattern_char.
205 switch (pattern_char
) {
206 case 'd': return IsAsciiDigit(ch
);
207 case 'D': return !IsAsciiDigit(ch
);
208 case 'f': return ch
== '\f';
209 case 'n': return ch
== '\n';
210 case 'r': return ch
== '\r';
211 case 's': return IsAsciiWhiteSpace(ch
);
212 case 'S': return !IsAsciiWhiteSpace(ch
);
213 case 't': return ch
== '\t';
214 case 'v': return ch
== '\v';
215 case 'w': return IsAsciiWordChar(ch
);
216 case 'W': return !IsAsciiWordChar(ch
);
218 return IsAsciiPunct(pattern_char
) && pattern_char
== ch
;
221 return (pattern_char
== '.' && ch
!= '\n') || pattern_char
== ch
;
224 // Helper function used by ValidateRegex() to format error messages.
225 String
FormatRegexSyntaxError(const char* regex
, int index
) {
226 return (Message() << "Syntax error at index " << index
227 << " in simple regular expression \"" << regex
<< "\": ").GetString();
230 // Generates non-fatal failures and returns false if regex is invalid;
231 // otherwise returns true.
232 bool ValidateRegex(const char* regex
) {
234 // TODO(wan@google.com): fix the source file location in the
235 // assertion failures to match where the regex is used in user
237 ADD_FAILURE() << "NULL is not a valid simple regular expression.";
241 bool is_valid
= true;
243 // True iff ?, *, or + can follow the previous atom.
244 bool prev_repeatable
= false;
245 for (int i
= 0; regex
[i
]; i
++) {
246 if (regex
[i
] == '\\') { // An escape sequence
248 if (regex
[i
] == '\0') {
249 ADD_FAILURE() << FormatRegexSyntaxError(regex
, i
- 1)
250 << "'\\' cannot appear at the end.";
254 if (!IsValidEscape(regex
[i
])) {
255 ADD_FAILURE() << FormatRegexSyntaxError(regex
, i
- 1)
256 << "invalid escape sequence \"\\" << regex
[i
] << "\".";
259 prev_repeatable
= true;
260 } else { // Not an escape sequence.
261 const char ch
= regex
[i
];
263 if (ch
== '^' && i
> 0) {
264 ADD_FAILURE() << FormatRegexSyntaxError(regex
, i
)
265 << "'^' can only appear at the beginning.";
267 } else if (ch
== '$' && regex
[i
+ 1] != '\0') {
268 ADD_FAILURE() << FormatRegexSyntaxError(regex
, i
)
269 << "'$' can only appear at the end.";
271 } else if (IsInSet(ch
, "()[]{}|")) {
272 ADD_FAILURE() << FormatRegexSyntaxError(regex
, i
)
273 << "'" << ch
<< "' is unsupported.";
275 } else if (IsRepeat(ch
) && !prev_repeatable
) {
276 ADD_FAILURE() << FormatRegexSyntaxError(regex
, i
)
277 << "'" << ch
<< "' can only follow a repeatable token.";
281 prev_repeatable
= !IsInSet(ch
, "^$?*+");
288 // Matches a repeated regex atom followed by a valid simple regular
289 // expression. The regex atom is defined as c if escaped is false,
290 // or \c otherwise. repeat is the repetition meta character (?, *,
291 // or +). The behavior is undefined if str contains too many
292 // characters to be indexable by size_t, in which case the test will
293 // probably time out anyway. We are fine with this limitation as
294 // std::string has it too.
295 bool MatchRepetitionAndRegexAtHead(
296 bool escaped
, char c
, char repeat
, const char* regex
,
298 const size_t min_count
= (repeat
== '+') ? 1 : 0;
299 const size_t max_count
= (repeat
== '?') ? 1 :
300 static_cast<size_t>(-1) - 1;
301 // We cannot call numeric_limits::max() as it conflicts with the
302 // max() macro on Windows.
304 for (size_t i
= 0; i
<= max_count
; ++i
) {
305 // We know that the atom matches each of the first i characters in str.
306 if (i
>= min_count
&& MatchRegexAtHead(regex
, str
+ i
)) {
307 // We have enough matches at the head, and the tail matches too.
308 // Since we only care about *whether* the pattern matches str
309 // (as opposed to *how* it matches), there is no need to find a
313 if (str
[i
] == '\0' || !AtomMatchesChar(escaped
, c
, str
[i
]))
319 // Returns true iff regex matches a prefix of str. regex must be a
320 // valid simple regular expression and not start with "^", or the
321 // result is undefined.
322 bool MatchRegexAtHead(const char* regex
, const char* str
) {
323 if (*regex
== '\0') // An empty regex matches a prefix of anything.
326 // "$" only matches the end of a string. Note that regex being
327 // valid guarantees that there's nothing after "$" in it.
331 // Is the first thing in regex an escape sequence?
332 const bool escaped
= *regex
== '\\';
335 if (IsRepeat(regex
[1])) {
336 // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
337 // here's an indirect recursion. It terminates as the regex gets
338 // shorter in each recursion.
339 return MatchRepetitionAndRegexAtHead(
340 escaped
, regex
[0], regex
[1], regex
+ 2, str
);
342 // regex isn't empty, isn't "$", and doesn't start with a
343 // repetition. We match the first atom of regex with the first
344 // character of str and recurse.
345 return (*str
!= '\0') && AtomMatchesChar(escaped
, *regex
, *str
) &&
346 MatchRegexAtHead(regex
+ 1, str
+ 1);
350 // Returns true iff regex matches any substring of str. regex must be
351 // a valid simple regular expression, or the result is undefined.
353 // The algorithm is recursive, but the recursion depth doesn't exceed
354 // the regex length, so we won't need to worry about running out of
355 // stack space normally. In rare cases the time complexity can be
356 // exponential with respect to the regex length + the string length,
357 // but usually it's must faster (often close to linear).
358 bool MatchRegexAnywhere(const char* regex
, const char* str
) {
359 if (regex
== NULL
|| str
== NULL
)
363 return MatchRegexAtHead(regex
+ 1, str
);
365 // A successful match can be anywhere in str.
367 if (MatchRegexAtHead(regex
, str
))
369 } while (*str
++ != '\0');
373 // Implements the RE class.
376 free(const_cast<char*>(pattern_
));
377 free(const_cast<char*>(full_pattern_
));
380 // Returns true iff regular expression re matches the entire str.
381 bool RE::FullMatch(const char* str
, const RE
& re
) {
382 return re
.is_valid_
&& MatchRegexAnywhere(re
.full_pattern_
, str
);
385 // Returns true iff regular expression re matches a substring of str
386 // (including str itself).
387 bool RE::PartialMatch(const char* str
, const RE
& re
) {
388 return re
.is_valid_
&& MatchRegexAnywhere(re
.pattern_
, str
);
391 // Initializes an RE from its string representation.
392 void RE::Init(const char* regex
) {
393 pattern_
= full_pattern_
= NULL
;
395 pattern_
= posix::StrDup(regex
);
398 is_valid_
= ValidateRegex(regex
);
400 // No need to calculate the full pattern when the regex is invalid.
404 const size_t len
= strlen(regex
);
405 // Reserves enough bytes to hold the regular expression used for a
406 // full match: we need space to prepend a '^', append a '$', and
407 // terminate the string with '\0'.
408 char* buffer
= static_cast<char*>(malloc(len
+ 3));
409 full_pattern_
= buffer
;
412 *buffer
++ = '^'; // Makes sure full_pattern_ starts with '^'.
414 // We don't use snprintf or strncpy, as they trigger a warning when
415 // compiled with VC++ 8.0.
416 memcpy(buffer
, regex
, len
);
419 if (len
== 0 || regex
[len
- 1] != '$')
420 *buffer
++ = '$'; // Makes sure full_pattern_ ends with '$'.
425 #endif // GTEST_USES_POSIX_RE
427 const char kUnknownFile
[] = "unknown file";
429 // Formats a source file path and a line number as they would appear
430 // in an error message from the compiler used to compile this code.
431 GTEST_API_ ::std::string
FormatFileLocation(const char* file
, int line
) {
432 const char* const file_name
= file
== NULL
? kUnknownFile
: file
;
435 return String::Format("%s:", file_name
).c_str();
438 return String::Format("%s(%d):", file_name
, line
).c_str();
440 return String::Format("%s:%d:", file_name
, line
).c_str();
444 // Formats a file location for compiler-independent XML output.
445 // Although this function is not platform dependent, we put it next to
446 // FormatFileLocation in order to contrast the two functions.
447 // Note that FormatCompilerIndependentFileLocation() does NOT append colon
448 // to the file location it produces, unlike FormatFileLocation().
449 GTEST_API_ ::std::string
FormatCompilerIndependentFileLocation(
450 const char* file
, int line
) {
451 const char* const file_name
= file
== NULL
? kUnknownFile
: file
;
456 return String::Format("%s:%d", file_name
, line
).c_str();
460 GTestLog::GTestLog(GTestLogSeverity severity
, const char* file
, int line
)
461 : severity_(severity
) {
462 const char* const marker
=
463 severity
== GTEST_INFO
? "[ INFO ]" :
464 severity
== GTEST_WARNING
? "[WARNING]" :
465 severity
== GTEST_ERROR
? "[ ERROR ]" : "[ FATAL ]";
466 GetStream() << ::std::endl
<< marker
<< " "
467 << FormatFileLocation(file
, line
).c_str() << ": ";
470 // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
471 GTestLog::~GTestLog() {
472 GetStream() << ::std::endl
;
473 if (severity_
== GTEST_FATAL
) {
478 // Disable Microsoft deprecation warnings for POSIX functions called from
479 // this class (creat, dup, dup2, and close)
481 # pragma warning(push)
482 # pragma warning(disable: 4996)
485 #if GTEST_HAS_STREAM_REDIRECTION
487 // Object that captures an output stream (stdout/stderr).
488 class CapturedStream
{
490 // The ctor redirects the stream to a temporary file.
491 CapturedStream(int fd
) : fd_(fd
), uncaptured_fd_(dup(fd
)) {
493 # if GTEST_OS_WINDOWS
494 char temp_dir_path
[MAX_PATH
+ 1] = { '\0' }; // NOLINT
495 char temp_file_path
[MAX_PATH
+ 1] = { '\0' }; // NOLINT
497 ::GetTempPathA(sizeof(temp_dir_path
), temp_dir_path
);
498 const UINT success
= ::GetTempFileNameA(temp_dir_path
,
500 0, // Generate unique file name.
502 GTEST_CHECK_(success
!= 0)
503 << "Unable to create a temporary file in " << temp_dir_path
;
504 const int captured_fd
= creat(temp_file_path
, _S_IREAD
| _S_IWRITE
);
505 GTEST_CHECK_(captured_fd
!= -1) << "Unable to open temporary file "
507 filename_
= temp_file_path
;
508 #elif GTEST_OS_LINUX_ANDROID
509 char name_template
[] = "/sdcard/captured_stderr.XXXXXX";
510 const int captured_fd
= mkstemp(name_template
);
511 filename_
= name_template
;
513 // There's no guarantee that a test has write access to the
514 // current directory, so we create the temporary file in the /tmp
515 // directory instead.
516 char name_template
[] = "/tmp/captured_stream.XXXXXX";
517 const int captured_fd
= mkstemp(name_template
);
518 filename_
= name_template
;
519 # endif // GTEST_OS_WINDOWS
521 dup2(captured_fd
, fd_
);
526 remove(filename_
.c_str());
529 String
GetCapturedString() {
530 if (uncaptured_fd_
!= -1) {
531 // Restores the original stream.
533 dup2(uncaptured_fd_
, fd_
);
534 close(uncaptured_fd_
);
538 FILE* const file
= posix::FOpen(filename_
.c_str(), "r");
539 const String content
= ReadEntireFile(file
);
545 // Reads the entire content of a file as a String.
546 static String
ReadEntireFile(FILE* file
);
548 // Returns the size (in bytes) of a file.
549 static size_t GetFileSize(FILE* file
);
551 const int fd_
; // A stream to capture.
553 // Name of the temporary file holding the stderr output.
554 ::std::string filename_
;
556 GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream
);
559 // Returns the size (in bytes) of a file.
560 size_t CapturedStream::GetFileSize(FILE* file
) {
561 fseek(file
, 0, SEEK_END
);
562 return static_cast<size_t>(ftell(file
));
565 // Reads the entire content of a file as a string.
566 String
CapturedStream::ReadEntireFile(FILE* file
) {
567 const size_t file_size
= GetFileSize(file
);
568 char* const buffer
= new char[file_size
];
570 size_t bytes_last_read
= 0; // # of bytes read in the last fread()
571 size_t bytes_read
= 0; // # of bytes read so far
573 fseek(file
, 0, SEEK_SET
);
575 // Keeps reading the file until we cannot read further or the
576 // pre-determined file size is reached.
578 bytes_last_read
= fread(buffer
+bytes_read
, 1, file_size
-bytes_read
, file
);
579 bytes_read
+= bytes_last_read
;
580 } while (bytes_last_read
> 0 && bytes_read
< file_size
);
582 const String
content(buffer
, bytes_read
);
589 # pragma warning(pop)
592 static CapturedStream
* g_captured_stderr
= NULL
;
593 static CapturedStream
* g_captured_stdout
= NULL
;
595 // Starts capturing an output stream (stdout/stderr).
596 void CaptureStream(int fd
, const char* stream_name
, CapturedStream
** stream
) {
597 if (*stream
!= NULL
) {
598 GTEST_LOG_(FATAL
) << "Only one " << stream_name
599 << " capturer can exist at a time.";
601 *stream
= new CapturedStream(fd
);
604 // Stops capturing the output stream and returns the captured string.
605 String
GetCapturedStream(CapturedStream
** captured_stream
) {
606 const String content
= (*captured_stream
)->GetCapturedString();
608 delete *captured_stream
;
609 *captured_stream
= NULL
;
614 // Starts capturing stdout.
615 void CaptureStdout() {
616 CaptureStream(kStdOutFileno
, "stdout", &g_captured_stdout
);
619 // Starts capturing stderr.
620 void CaptureStderr() {
621 CaptureStream(kStdErrFileno
, "stderr", &g_captured_stderr
);
624 // Stops capturing stdout and returns the captured string.
625 String
GetCapturedStdout() { return GetCapturedStream(&g_captured_stdout
); }
627 // Stops capturing stderr and returns the captured string.
628 String
GetCapturedStderr() { return GetCapturedStream(&g_captured_stderr
); }
630 #endif // GTEST_HAS_STREAM_REDIRECTION
632 #if GTEST_HAS_DEATH_TEST
634 // A copy of all command line arguments. Set by InitGoogleTest().
635 ::std::vector
<String
> g_argvs
;
637 // Returns the command line as a vector of strings.
638 const ::std::vector
<String
>& GetArgvs() { return g_argvs
; }
640 #endif // GTEST_HAS_DEATH_TEST
642 #if GTEST_OS_WINDOWS_MOBILE
646 TerminateProcess(GetCurrentProcess(), 1);
649 #endif // GTEST_OS_WINDOWS_MOBILE
651 // Returns the name of the environment variable corresponding to the
652 // given flag. For example, FlagToEnvVar("foo") will return
653 // "GTEST_FOO" in the open-source version.
654 static String
FlagToEnvVar(const char* flag
) {
655 const String full_flag
=
656 (Message() << GTEST_FLAG_PREFIX_
<< flag
).GetString();
659 for (size_t i
= 0; i
!= full_flag
.length(); i
++) {
660 env_var
<< ToUpper(full_flag
.c_str()[i
]);
663 return env_var
.GetString();
666 // Parses 'str' for a 32-bit signed integer. If successful, writes
667 // the result to *value and returns true; otherwise leaves *value
668 // unchanged and returns false.
669 bool ParseInt32(const Message
& src_text
, const char* str
, Int32
* value
) {
670 // Parses the environment variable as a decimal integer.
672 const long long_value
= strtol(str
, &end
, 10); // NOLINT
674 // Has strtol() consumed all characters in the string?
676 // No - an invalid character was encountered.
678 msg
<< "WARNING: " << src_text
679 << " is expected to be a 32-bit integer, but actually"
680 << " has value \"" << str
<< "\".\n";
681 printf("%s", msg
.GetString().c_str());
686 // Is the parsed value in the range of an Int32?
687 const Int32 result
= static_cast<Int32
>(long_value
);
688 if (long_value
== LONG_MAX
|| long_value
== LONG_MIN
||
689 // The parsed value overflows as a long. (strtol() returns
690 // LONG_MAX or LONG_MIN when the input overflows.)
692 // The parsed value overflows as an Int32.
695 msg
<< "WARNING: " << src_text
696 << " is expected to be a 32-bit integer, but actually"
697 << " has value " << str
<< ", which overflows.\n";
698 printf("%s", msg
.GetString().c_str());
707 // Reads and returns the Boolean environment variable corresponding to
708 // the given flag; if it's not set, returns default_value.
710 // The value is considered true iff it's not "0".
711 bool BoolFromGTestEnv(const char* flag
, bool default_value
) {
712 const String env_var
= FlagToEnvVar(flag
);
713 const char* const string_value
= posix::GetEnv(env_var
.c_str());
714 return string_value
== NULL
?
715 default_value
: strcmp(string_value
, "0") != 0;
718 // Reads and returns a 32-bit integer stored in the environment
719 // variable corresponding to the given flag; if it isn't set or
720 // doesn't represent a valid 32-bit integer, returns default_value.
721 Int32
Int32FromGTestEnv(const char* flag
, Int32 default_value
) {
722 const String env_var
= FlagToEnvVar(flag
);
723 const char* const string_value
= posix::GetEnv(env_var
.c_str());
724 if (string_value
== NULL
) {
725 // The environment variable is not set.
726 return default_value
;
729 Int32 result
= default_value
;
730 if (!ParseInt32(Message() << "Environment variable " << env_var
,
731 string_value
, &result
)) {
732 printf("The default value %s is used.\n",
733 (Message() << default_value
).GetString().c_str());
735 return default_value
;
741 // Reads and returns the string environment variable corresponding to
742 // the given flag; if it's not set, returns default_value.
743 const char* StringFromGTestEnv(const char* flag
, const char* default_value
) {
744 const String env_var
= FlagToEnvVar(flag
);
745 const char* const value
= posix::GetEnv(env_var
.c_str());
746 return value
== NULL
? default_value
: value
;
749 } // namespace internal
750 } // namespace testing