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      1 // Copyright 2005, 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 // Authors: wan (at) google.com (Zhanyong Wan)
     31 //
     32 // Low-level types and utilities for porting Google Test to various
     33 // platforms.  They are subject to change without notice.  DO NOT USE
     34 // THEM IN USER CODE.
     35 
     36 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
     37 #define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
     38 
     39 // The user can define the following macros in the build script to
     40 // control Google Test's behavior.  If the user doesn't define a macro
     41 // in this list, Google Test will define it.
     42 //
     43 //   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
     44 //                              is/isn't available.
     45 //   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
     46 //                              are enabled.
     47 //   GTEST_HAS_GLOBAL_STRING  - Define it to 1/0 to indicate that ::string
     48 //                              is/isn't available (some systems define
     49 //                              ::string, which is different to std::string).
     50 //   GTEST_HAS_GLOBAL_WSTRING - Define it to 1/0 to indicate that ::string
     51 //                              is/isn't available (some systems define
     52 //                              ::wstring, which is different to std::wstring).
     53 //   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
     54 //                              expressions are/aren't available.
     55 //   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
     56 //                              is/isn't available.
     57 //   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
     58 //                              enabled.
     59 //   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
     60 //                              std::wstring does/doesn't work (Google Test can
     61 //                              be used where std::wstring is unavailable).
     62 //   GTEST_HAS_TR1_TUPLE      - Define it to 1/0 to indicate tr1::tuple
     63 //                              is/isn't available.
     64 //   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
     65 //                              compiler supports Microsoft's "Structured
     66 //                              Exception Handling".
     67 //   GTEST_HAS_STREAM_REDIRECTION
     68 //                            - Define it to 1/0 to indicate whether the
     69 //                              platform supports I/O stream redirection using
     70 //                              dup() and dup2().
     71 //   GTEST_USE_OWN_TR1_TUPLE  - Define it to 1/0 to indicate whether Google
     72 //                              Test's own tr1 tuple implementation should be
     73 //                              used.  Unused when the user sets
     74 //                              GTEST_HAS_TR1_TUPLE to 0.
     75 //   GTEST_LINKED_AS_SHARED_LIBRARY
     76 //                            - Define to 1 when compiling tests that use
     77 //                              Google Test as a shared library (known as
     78 //                              DLL on Windows).
     79 //   GTEST_CREATE_SHARED_LIBRARY
     80 //                            - Define to 1 when compiling Google Test itself
     81 //                              as a shared library.
     82 
     83 // This header defines the following utilities:
     84 //
     85 // Macros indicating the current platform (defined to 1 if compiled on
     86 // the given platform; otherwise undefined):
     87 //   GTEST_OS_AIX      - IBM AIX
     88 //   GTEST_OS_CYGWIN   - Cygwin
     89 //   GTEST_OS_FREEBSD  - FreeBSD
     90 //   GTEST_OS_HAIKU    - Haiku
     91 //   GTEST_OS_HPUX     - HP-UX
     92 //   GTEST_OS_LINUX    - Linux
     93 //     GTEST_OS_LINUX_ANDROID - Google Android
     94 //   GTEST_OS_MAC      - Mac OS X
     95 //   GTEST_OS_NACL     - Google Native Client (NaCl)
     96 //   GTEST_OS_SOLARIS  - Sun Solaris
     97 //   GTEST_OS_SYMBIAN  - Symbian
     98 //   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
     99 //     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
    100 //     GTEST_OS_WINDOWS_MINGW    - MinGW
    101 //     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
    102 //   GTEST_OS_ZOS      - z/OS
    103 //
    104 // Among the platforms, Cygwin, Linux, Max OS X, and Windows have the
    105 // most stable support.  Since core members of the Google Test project
    106 // don't have access to other platforms, support for them may be less
    107 // stable.  If you notice any problems on your platform, please notify
    108 // googletestframework (at) googlegroups.com (patches for fixing them are
    109 // even more welcome!).
    110 //
    111 // Note that it is possible that none of the GTEST_OS_* macros are defined.
    112 //
    113 // Macros indicating available Google Test features (defined to 1 if
    114 // the corresponding feature is supported; otherwise undefined):
    115 //   GTEST_HAS_COMBINE      - the Combine() function (for value-parameterized
    116 //                            tests)
    117 //   GTEST_HAS_DEATH_TEST   - death tests
    118 //   GTEST_HAS_PARAM_TEST   - value-parameterized tests
    119 //   GTEST_HAS_TYPED_TEST   - typed tests
    120 //   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
    121 //   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
    122 //                            GTEST_HAS_POSIX_RE (see above) which users can
    123 //                            define themselves.
    124 //   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
    125 //                            the above two are mutually exclusive.
    126 //   GTEST_CAN_COMPARE_NULL - accepts untyped NULL in EXPECT_EQ().
    127 //
    128 // Macros for basic C++ coding:
    129 //   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
    130 //   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
    131 //                              variable don't have to be used.
    132 //   GTEST_DISALLOW_ASSIGN_   - disables operator=.
    133 //   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
    134 //   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
    135 //
    136 // Synchronization:
    137 //   Mutex, MutexLock, ThreadLocal, GetThreadCount()
    138 //                  - synchronization primitives.
    139 //   GTEST_IS_THREADSAFE - defined to 1 to indicate that the above
    140 //                         synchronization primitives have real implementations
    141 //                         and Google Test is thread-safe; or 0 otherwise.
    142 //
    143 // Template meta programming:
    144 //   is_pointer     - as in TR1; needed on Symbian and IBM XL C/C++ only.
    145 //   IteratorTraits - partial implementation of std::iterator_traits, which
    146 //                    is not available in libCstd when compiled with Sun C++.
    147 //
    148 // Smart pointers:
    149 //   scoped_ptr     - as in TR2.
    150 //
    151 // Regular expressions:
    152 //   RE             - a simple regular expression class using the POSIX
    153 //                    Extended Regular Expression syntax on UNIX-like
    154 //                    platforms, or a reduced regular exception syntax on
    155 //                    other platforms, including Windows.
    156 //
    157 // Logging:
    158 //   GTEST_LOG_()   - logs messages at the specified severity level.
    159 //   LogToStderr()  - directs all log messages to stderr.
    160 //   FlushInfoLog() - flushes informational log messages.
    161 //
    162 // Stdout and stderr capturing:
    163 //   CaptureStdout()     - starts capturing stdout.
    164 //   GetCapturedStdout() - stops capturing stdout and returns the captured
    165 //                         string.
    166 //   CaptureStderr()     - starts capturing stderr.
    167 //   GetCapturedStderr() - stops capturing stderr and returns the captured
    168 //                         string.
    169 //
    170 // Integer types:
    171 //   TypeWithSize   - maps an integer to a int type.
    172 //   Int32, UInt32, Int64, UInt64, TimeInMillis
    173 //                  - integers of known sizes.
    174 //   BiggestInt     - the biggest signed integer type.
    175 //
    176 // Command-line utilities:
    177 //   GTEST_FLAG()       - references a flag.
    178 //   GTEST_DECLARE_*()  - declares a flag.
    179 //   GTEST_DEFINE_*()   - defines a flag.
    180 //   GetArgvs()         - returns the command line as a vector of strings.
    181 //
    182 // Environment variable utilities:
    183 //   GetEnv()             - gets the value of an environment variable.
    184 //   BoolFromGTestEnv()   - parses a bool environment variable.
    185 //   Int32FromGTestEnv()  - parses an Int32 environment variable.
    186 //   StringFromGTestEnv() - parses a string environment variable.
    187 
    188 #include <ctype.h>   // for isspace, etc
    189 #include <stddef.h>  // for ptrdiff_t
    190 #include <stdlib.h>
    191 #include <stdio.h>
    192 #include <string.h>
    193 #ifndef _WIN32_WCE
    194 # include <sys/types.h>
    195 # include <sys/stat.h>
    196 #endif  // !_WIN32_WCE
    197 
    198 #include <iostream>  // NOLINT
    199 #include <sstream>  // NOLINT
    200 #include <string>  // NOLINT
    201 
    202 #define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
    203 #define GTEST_FLAG_PREFIX_ "gtest_"
    204 #define GTEST_FLAG_PREFIX_DASH_ "gtest-"
    205 #define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
    206 #define GTEST_NAME_ "Google Test"
    207 #define GTEST_PROJECT_URL_ "http://code.google.com/p/googletest/"
    208 
    209 // Determines the version of gcc that is used to compile this.
    210 #ifdef __GNUC__
    211 // 40302 means version 4.3.2.
    212 # define GTEST_GCC_VER_ \
    213     (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
    214 #endif  // __GNUC__
    215 
    216 // Determines the platform on which Google Test is compiled.
    217 #ifdef __CYGWIN__
    218 # define GTEST_OS_CYGWIN 1
    219 #elif defined __SYMBIAN32__
    220 # define GTEST_OS_SYMBIAN 1
    221 #elif defined _WIN32
    222 # define GTEST_OS_WINDOWS 1
    223 # ifdef _WIN32_WCE
    224 #  define GTEST_OS_WINDOWS_MOBILE 1
    225 # elif defined(__MINGW__) || defined(__MINGW32__)
    226 #  define GTEST_OS_WINDOWS_MINGW 1
    227 # else
    228 #  define GTEST_OS_WINDOWS_DESKTOP 1
    229 # endif  // _WIN32_WCE
    230 #elif defined __APPLE__
    231 # define GTEST_OS_MAC 1
    232 #elif defined __FreeBSD__
    233 # define GTEST_OS_FREEBSD 1
    234 #elif defined __linux__
    235 # define GTEST_OS_LINUX 1
    236 # if defined(ANDROID) || defined(__ANDROID__)
    237 #  define GTEST_OS_LINUX_ANDROID 1
    238 # endif  // ANDROID
    239 #elif defined __MVS__
    240 # define GTEST_OS_ZOS 1
    241 #elif defined(__sun) && defined(__SVR4)
    242 # define GTEST_OS_SOLARIS 1
    243 #elif defined(_AIX)
    244 # define GTEST_OS_AIX 1
    245 #elif defined(__hpux)
    246 # define GTEST_OS_HPUX 1
    247 #elif defined __native_client__
    248 # define GTEST_OS_NACL 1
    249 #elif defined(__HAIKU__)
    250 # define GTEST_OS_HAIKU 1
    251 #endif  // __CYGWIN__
    252 
    253 // Brings in definitions for functions used in the testing::internal::posix
    254 // namespace (read, write, close, chdir, isatty, stat). We do not currently
    255 // use them on Windows Mobile.
    256 #if !GTEST_OS_WINDOWS
    257 // This assumes that non-Windows OSes provide unistd.h. For OSes where this
    258 // is not the case, we need to include headers that provide the functions
    259 // mentioned above.
    260 # include <unistd.h>
    261 # if !GTEST_OS_NACL
    262 // TODO(vladl (at) google.com): Remove this condition when Native Client SDK adds
    263 // strings.h (tracked in
    264 // http://code.google.com/p/nativeclient/issues/detail?id=1175).
    265 #  include <strings.h>  // Native Client doesn't provide strings.h.
    266 # endif
    267 #elif !GTEST_OS_WINDOWS_MOBILE
    268 # include <direct.h>
    269 # include <io.h>
    270 #endif
    271 
    272 // Defines this to true iff Google Test can use POSIX regular expressions.
    273 #ifndef GTEST_HAS_POSIX_RE
    274 # define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS)
    275 #endif
    276 
    277 #if GTEST_HAS_POSIX_RE
    278 
    279 // On some platforms, <regex.h> needs someone to define size_t, and
    280 // won't compile otherwise.  We can #include it here as we already
    281 // included <stdlib.h>, which is guaranteed to define size_t through
    282 // <stddef.h>.
    283 # include <regex.h>  // NOLINT
    284 
    285 # define GTEST_USES_POSIX_RE 1
    286 
    287 #elif GTEST_OS_WINDOWS
    288 
    289 // <regex.h> is not available on Windows.  Use our own simple regex
    290 // implementation instead.
    291 # define GTEST_USES_SIMPLE_RE 1
    292 
    293 #else
    294 
    295 // <regex.h> may not be available on this platform.  Use our own
    296 // simple regex implementation instead.
    297 # define GTEST_USES_SIMPLE_RE 1
    298 
    299 #endif  // GTEST_HAS_POSIX_RE
    300 
    301 #ifndef GTEST_HAS_EXCEPTIONS
    302 // The user didn't tell us whether exceptions are enabled, so we need
    303 // to figure it out.
    304 # if defined(_MSC_VER) || defined(__BORLANDC__)
    305 // MSVC's and C++Builder's implementations of the STL use the _HAS_EXCEPTIONS
    306 // macro to enable exceptions, so we'll do the same.
    307 // Assumes that exceptions are enabled by default.
    308 #  ifndef _HAS_EXCEPTIONS
    309 #   define _HAS_EXCEPTIONS 1
    310 #  endif  // _HAS_EXCEPTIONS
    311 #  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
    312 # elif defined(__GNUC__) && __EXCEPTIONS
    313 // gcc defines __EXCEPTIONS to 1 iff exceptions are enabled.
    314 #  define GTEST_HAS_EXCEPTIONS 1
    315 # elif defined(__SUNPRO_CC)
    316 // Sun Pro CC supports exceptions.  However, there is no compile-time way of
    317 // detecting whether they are enabled or not.  Therefore, we assume that
    318 // they are enabled unless the user tells us otherwise.
    319 #  define GTEST_HAS_EXCEPTIONS 1
    320 # elif defined(__IBMCPP__) && __EXCEPTIONS
    321 // xlC defines __EXCEPTIONS to 1 iff exceptions are enabled.
    322 #  define GTEST_HAS_EXCEPTIONS 1
    323 # elif defined(__HP_aCC)
    324 // Exception handling is in effect by default in HP aCC compiler. It has to
    325 // be turned of by +noeh compiler option if desired.
    326 #  define GTEST_HAS_EXCEPTIONS 1
    327 # else
    328 // For other compilers, we assume exceptions are disabled to be
    329 // conservative.
    330 #  define GTEST_HAS_EXCEPTIONS 0
    331 # endif  // defined(_MSC_VER) || defined(__BORLANDC__)
    332 #endif  // GTEST_HAS_EXCEPTIONS
    333 
    334 #if !defined(GTEST_HAS_STD_STRING)
    335 // Even though we don't use this macro any longer, we keep it in case
    336 // some clients still depend on it.
    337 # define GTEST_HAS_STD_STRING 1
    338 #elif !GTEST_HAS_STD_STRING
    339 // The user told us that ::std::string isn't available.
    340 # error "Google Test cannot be used where ::std::string isn't available."
    341 #endif  // !defined(GTEST_HAS_STD_STRING)
    342 
    343 #ifndef GTEST_HAS_GLOBAL_STRING
    344 // The user didn't tell us whether ::string is available, so we need
    345 // to figure it out.
    346 
    347 # define GTEST_HAS_GLOBAL_STRING 0
    348 
    349 #endif  // GTEST_HAS_GLOBAL_STRING
    350 
    351 #ifndef GTEST_HAS_STD_WSTRING
    352 // The user didn't tell us whether ::std::wstring is available, so we need
    353 // to figure it out.
    354 // TODO(wan (at) google.com): uses autoconf to detect whether ::std::wstring
    355 //   is available.
    356 
    357 // Cygwin 1.7 and below doesn't support ::std::wstring.
    358 // Solaris' libc++ doesn't support it either.  Android has
    359 // no support for it at least as recent as Froyo (2.2).
    360 // Minix currently doesn't support it either.
    361 # define GTEST_HAS_STD_WSTRING \
    362     (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || GTEST_OS_HAIKU || defined(_MINIX)))
    363 
    364 #endif  // GTEST_HAS_STD_WSTRING
    365 
    366 #ifndef GTEST_HAS_GLOBAL_WSTRING
    367 // The user didn't tell us whether ::wstring is available, so we need
    368 // to figure it out.
    369 # define GTEST_HAS_GLOBAL_WSTRING \
    370     (GTEST_HAS_STD_WSTRING && GTEST_HAS_GLOBAL_STRING)
    371 #endif  // GTEST_HAS_GLOBAL_WSTRING
    372 
    373 // Determines whether RTTI is available.
    374 #ifndef GTEST_HAS_RTTI
    375 // The user didn't tell us whether RTTI is enabled, so we need to
    376 // figure it out.
    377 
    378 # ifdef _MSC_VER
    379 
    380 #  ifdef _CPPRTTI  // MSVC defines this macro iff RTTI is enabled.
    381 #   define GTEST_HAS_RTTI 1
    382 #  else
    383 #   define GTEST_HAS_RTTI 0
    384 #  endif
    385 
    386 // Starting with version 4.3.2, gcc defines __GXX_RTTI iff RTTI is enabled.
    387 # elif defined(__GNUC__) && (GTEST_GCC_VER_ >= 40302)
    388 
    389 #  ifdef __GXX_RTTI
    390 #   define GTEST_HAS_RTTI 1
    391 #  else
    392 #   define GTEST_HAS_RTTI 0
    393 #  endif  // __GXX_RTTI
    394 
    395 // Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
    396 // both the typeid and dynamic_cast features are present.
    397 # elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
    398 
    399 #  ifdef __RTTI_ALL__
    400 #   define GTEST_HAS_RTTI 1
    401 #  else
    402 #   define GTEST_HAS_RTTI 0
    403 #  endif
    404 
    405 # else
    406 
    407 // For all other compilers, we assume RTTI is enabled.
    408 #  define GTEST_HAS_RTTI 1
    409 
    410 # endif  // _MSC_VER
    411 
    412 #endif  // GTEST_HAS_RTTI
    413 
    414 // It's this header's responsibility to #include <typeinfo> when RTTI
    415 // is enabled.
    416 #if GTEST_HAS_RTTI
    417 # include <typeinfo>
    418 #endif
    419 
    420 // Determines whether Google Test can use the pthreads library.
    421 #ifndef GTEST_HAS_PTHREAD
    422 // The user didn't tell us explicitly, so we assume pthreads support is
    423 // available on Linux and Mac.
    424 //
    425 // To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
    426 // to your compiler flags.
    427 # define GTEST_HAS_PTHREAD (GTEST_OS_LINUX || GTEST_OS_MAC || \
    428           GTEST_OS_HPUX || GTEST_OS_FREEBSD)
    429 #endif  // GTEST_HAS_PTHREAD
    430 
    431 #if GTEST_HAS_PTHREAD
    432 // gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
    433 // true.
    434 # include <pthread.h>  // NOLINT
    435 
    436 // For timespec and nanosleep, used below.
    437 # include <time.h>  // NOLINT
    438 #endif
    439 
    440 // Determines whether Google Test can use tr1/tuple.  You can define
    441 // this macro to 0 to prevent Google Test from using tuple (any
    442 // feature depending on tuple with be disabled in this mode).
    443 #ifndef GTEST_HAS_TR1_TUPLE
    444 // The user didn't tell us not to do it, so we assume it's OK.
    445 # define GTEST_HAS_TR1_TUPLE 1
    446 #endif  // GTEST_HAS_TR1_TUPLE
    447 
    448 // Determines whether Google Test's own tr1 tuple implementation
    449 // should be used.
    450 #ifndef GTEST_USE_OWN_TR1_TUPLE
    451 // The user didn't tell us, so we need to figure it out.
    452 
    453 // We use our own TR1 tuple if we aren't sure the user has an
    454 // implementation of it already.  At this time, GCC 4.0.0+ and MSVC
    455 // 2010 are the only mainstream compilers that come with a TR1 tuple
    456 // implementation.  NVIDIA's CUDA NVCC compiler pretends to be GCC by
    457 // defining __GNUC__ and friends, but cannot compile GCC's tuple
    458 // implementation.  MSVC 2008 (9.0) provides TR1 tuple in a 323 MB
    459 // Feature Pack download, which we cannot assume the user has.
    460 # if (defined(__GNUC__) && !(defined(__CUDACC__) || defined(__clang__)) \
    461                         && (GTEST_GCC_VER_ >= 40000)) \
    462     || _MSC_VER >= 1600
    463 #  define GTEST_USE_OWN_TR1_TUPLE 0
    464 # else
    465 #  define GTEST_USE_OWN_TR1_TUPLE 1
    466 # endif
    467 
    468 #endif  // GTEST_USE_OWN_TR1_TUPLE
    469 
    470 // To avoid conditional compilation everywhere, we make it
    471 // gtest-port.h's responsibility to #include the header implementing
    472 // tr1/tuple.
    473 #if GTEST_HAS_TR1_TUPLE
    474 
    475 # if GTEST_USE_OWN_TR1_TUPLE
    476 #  include "gtest/internal/gtest-tuple.h"
    477 # elif GTEST_OS_SYMBIAN
    478 
    479 // On Symbian, BOOST_HAS_TR1_TUPLE causes Boost's TR1 tuple library to
    480 // use STLport's tuple implementation, which unfortunately doesn't
    481 // work as the copy of STLport distributed with Symbian is incomplete.
    482 // By making sure BOOST_HAS_TR1_TUPLE is undefined, we force Boost to
    483 // use its own tuple implementation.
    484 #  ifdef BOOST_HAS_TR1_TUPLE
    485 #   undef BOOST_HAS_TR1_TUPLE
    486 #  endif  // BOOST_HAS_TR1_TUPLE
    487 
    488 // This prevents <boost/tr1/detail/config.hpp>, which defines
    489 // BOOST_HAS_TR1_TUPLE, from being #included by Boost's <tuple>.
    490 #  define BOOST_TR1_DETAIL_CONFIG_HPP_INCLUDED
    491 #  include <tuple>
    492 
    493 # elif defined(__GNUC__) && (GTEST_GCC_VER_ >= 40000)
    494 // GCC 4.0+ implements tr1/tuple in the <tr1/tuple> header.  This does
    495 // not conform to the TR1 spec, which requires the header to be <tuple>.
    496 
    497 #  if !GTEST_HAS_RTTI && GTEST_GCC_VER_ < 40302
    498 // Until version 4.3.2, gcc has a bug that causes <tr1/functional>,
    499 // which is #included by <tr1/tuple>, to not compile when RTTI is
    500 // disabled.  _TR1_FUNCTIONAL is the header guard for
    501 // <tr1/functional>.  Hence the following #define is a hack to prevent
    502 // <tr1/functional> from being included.
    503 #   define _TR1_FUNCTIONAL 1
    504 #   include <tr1/tuple>
    505 #   undef _TR1_FUNCTIONAL  // Allows the user to #include
    506                         // <tr1/functional> if he chooses to.
    507 #  else
    508 #   include <tr1/tuple>  // NOLINT
    509 #  endif  // !GTEST_HAS_RTTI && GTEST_GCC_VER_ < 40302
    510 
    511 # else
    512 // If the compiler is not GCC 4.0+, we assume the user is using a
    513 // spec-conforming TR1 implementation.
    514 #  include <tuple>  // NOLINT
    515 # endif  // GTEST_USE_OWN_TR1_TUPLE
    516 
    517 #endif  // GTEST_HAS_TR1_TUPLE
    518 
    519 // Determines whether clone(2) is supported.
    520 // Usually it will only be available on Linux, excluding
    521 // Linux on the Itanium architecture.
    522 // Also see http://linux.die.net/man/2/clone.
    523 #ifndef GTEST_HAS_CLONE
    524 // The user didn't tell us, so we need to figure it out.
    525 
    526 # if GTEST_OS_LINUX && !defined(__ia64__)
    527 #  define GTEST_HAS_CLONE 1
    528 # else
    529 #  define GTEST_HAS_CLONE 0
    530 # endif  // GTEST_OS_LINUX && !defined(__ia64__)
    531 
    532 #endif  // GTEST_HAS_CLONE
    533 
    534 // Determines whether to support stream redirection. This is used to test
    535 // output correctness and to implement death tests.
    536 #ifndef GTEST_HAS_STREAM_REDIRECTION
    537 // By default, we assume that stream redirection is supported on all
    538 // platforms except known mobile ones.
    539 # if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN
    540 #  define GTEST_HAS_STREAM_REDIRECTION 0
    541 # else
    542 #  define GTEST_HAS_STREAM_REDIRECTION 1
    543 # endif  // !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_SYMBIAN
    544 #endif  // GTEST_HAS_STREAM_REDIRECTION
    545 
    546 // Determines whether to support death tests.
    547 // Google Test does not support death tests for VC 7.1 and earlier as
    548 // abort() in a VC 7.1 application compiled as GUI in debug config
    549 // pops up a dialog window that cannot be suppressed programmatically.
    550 #if (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
    551      (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER >= 1400) || \
    552      GTEST_OS_WINDOWS_MINGW || GTEST_OS_AIX || \
    553      GTEST_OS_HPUX || GTEST_OS_FREEBSD)
    554 # define GTEST_HAS_DEATH_TEST 1
    555 # include <vector>  // NOLINT
    556 #endif
    557 
    558 // We don't support MSVC 7.1 with exceptions disabled now.  Therefore
    559 // all the compilers we care about are adequate for supporting
    560 // value-parameterized tests.
    561 #define GTEST_HAS_PARAM_TEST 1
    562 
    563 // Determines whether to support type-driven tests.
    564 
    565 // Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
    566 // Sun Pro CC, IBM Visual Age, and HP aCC support.
    567 #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__SUNPRO_CC) || \
    568     defined(__IBMCPP__) || defined(__HP_aCC)
    569 # define GTEST_HAS_TYPED_TEST 1
    570 # define GTEST_HAS_TYPED_TEST_P 1
    571 #endif
    572 
    573 // Determines whether to support Combine(). This only makes sense when
    574 // value-parameterized tests are enabled.  The implementation doesn't
    575 // work on Sun Studio since it doesn't understand templated conversion
    576 // operators.
    577 #if GTEST_HAS_PARAM_TEST && GTEST_HAS_TR1_TUPLE && !defined(__SUNPRO_CC)
    578 # define GTEST_HAS_COMBINE 1
    579 #endif
    580 
    581 // Determines whether the system compiler uses UTF-16 for encoding wide strings.
    582 #define GTEST_WIDE_STRING_USES_UTF16_ \
    583     (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_SYMBIAN || GTEST_OS_AIX)
    584 
    585 // Determines whether test results can be streamed to a socket.
    586 #if GTEST_OS_LINUX
    587 # define GTEST_CAN_STREAM_RESULTS_ 1
    588 #endif
    589 
    590 // Defines some utility macros.
    591 
    592 // The GNU compiler emits a warning if nested "if" statements are followed by
    593 // an "else" statement and braces are not used to explicitly disambiguate the
    594 // "else" binding.  This leads to problems with code like:
    595 //
    596 //   if (gate)
    597 //     ASSERT_*(condition) << "Some message";
    598 //
    599 // The "switch (0) case 0:" idiom is used to suppress this.
    600 #ifdef __INTEL_COMPILER
    601 # define GTEST_AMBIGUOUS_ELSE_BLOCKER_
    602 #else
    603 # define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
    604 #endif
    605 
    606 // Use this annotation at the end of a struct/class definition to
    607 // prevent the compiler from optimizing away instances that are never
    608 // used.  This is useful when all interesting logic happens inside the
    609 // c'tor and / or d'tor.  Example:
    610 //
    611 //   struct Foo {
    612 //     Foo() { ... }
    613 //   } GTEST_ATTRIBUTE_UNUSED_;
    614 //
    615 // Also use it after a variable or parameter declaration to tell the
    616 // compiler the variable/parameter does not have to be used.
    617 #if defined(__GNUC__) && !defined(COMPILER_ICC)
    618 # define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
    619 #else
    620 # define GTEST_ATTRIBUTE_UNUSED_
    621 #endif
    622 
    623 // A macro to disallow operator=
    624 // This should be used in the private: declarations for a class.
    625 #define GTEST_DISALLOW_ASSIGN_(type)\
    626   void operator=(type const &)
    627 
    628 // A macro to disallow copy constructor and operator=
    629 // This should be used in the private: declarations for a class.
    630 #define GTEST_DISALLOW_COPY_AND_ASSIGN_(type)\
    631   type(type const &);\
    632   GTEST_DISALLOW_ASSIGN_(type)
    633 
    634 // Tell the compiler to warn about unused return values for functions declared
    635 // with this macro.  The macro should be used on function declarations
    636 // following the argument list:
    637 //
    638 //   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
    639 #if defined(__GNUC__) && (GTEST_GCC_VER_ >= 30400) && !defined(COMPILER_ICC)
    640 # define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
    641 #else
    642 # define GTEST_MUST_USE_RESULT_
    643 #endif  // __GNUC__ && (GTEST_GCC_VER_ >= 30400) && !COMPILER_ICC
    644 
    645 // Determine whether the compiler supports Microsoft's Structured Exception
    646 // Handling.  This is supported by several Windows compilers but generally
    647 // does not exist on any other system.
    648 #ifndef GTEST_HAS_SEH
    649 // The user didn't tell us, so we need to figure it out.
    650 
    651 # if defined(_MSC_VER) || defined(__BORLANDC__)
    652 // These two compilers are known to support SEH.
    653 #  define GTEST_HAS_SEH 1
    654 # else
    655 // Assume no SEH.
    656 #  define GTEST_HAS_SEH 0
    657 # endif
    658 
    659 #endif  // GTEST_HAS_SEH
    660 
    661 #ifdef _MSC_VER
    662 
    663 # if GTEST_LINKED_AS_SHARED_LIBRARY
    664 #  define GTEST_API_ __declspec(dllimport)
    665 # elif GTEST_CREATE_SHARED_LIBRARY
    666 #  define GTEST_API_ __declspec(dllexport)
    667 # endif
    668 
    669 #endif  // _MSC_VER
    670 
    671 #ifndef GTEST_API_
    672 # define GTEST_API_
    673 #endif
    674 
    675 #ifdef __GNUC__
    676 // Ask the compiler to never inline a given function.
    677 # define GTEST_NO_INLINE_ __attribute__((noinline))
    678 #else
    679 # define GTEST_NO_INLINE_
    680 #endif
    681 
    682 namespace testing {
    683 
    684 class Message;
    685 
    686 namespace internal {
    687 
    688 class String;
    689 
    690 // The GTEST_COMPILE_ASSERT_ macro can be used to verify that a compile time
    691 // expression is true. For example, you could use it to verify the
    692 // size of a static array:
    693 //
    694 //   GTEST_COMPILE_ASSERT_(ARRAYSIZE(content_type_names) == CONTENT_NUM_TYPES,
    695 //                         content_type_names_incorrect_size);
    696 //
    697 // or to make sure a struct is smaller than a certain size:
    698 //
    699 //   GTEST_COMPILE_ASSERT_(sizeof(foo) < 128, foo_too_large);
    700 //
    701 // The second argument to the macro is the name of the variable. If
    702 // the expression is false, most compilers will issue a warning/error
    703 // containing the name of the variable.
    704 
    705 template <bool>
    706 struct CompileAssert {
    707 };
    708 
    709 #define GTEST_COMPILE_ASSERT_(expr, msg) \
    710   typedef ::testing::internal::CompileAssert<(bool(expr))> \
    711       msg[bool(expr) ? 1 : -1]
    712 
    713 // Implementation details of GTEST_COMPILE_ASSERT_:
    714 //
    715 // - GTEST_COMPILE_ASSERT_ works by defining an array type that has -1
    716 //   elements (and thus is invalid) when the expression is false.
    717 //
    718 // - The simpler definition
    719 //
    720 //    #define GTEST_COMPILE_ASSERT_(expr, msg) typedef char msg[(expr) ? 1 : -1]
    721 //
    722 //   does not work, as gcc supports variable-length arrays whose sizes
    723 //   are determined at run-time (this is gcc's extension and not part
    724 //   of the C++ standard).  As a result, gcc fails to reject the
    725 //   following code with the simple definition:
    726 //
    727 //     int foo;
    728 //     GTEST_COMPILE_ASSERT_(foo, msg); // not supposed to compile as foo is
    729 //                                      // not a compile-time constant.
    730 //
    731 // - By using the type CompileAssert<(bool(expr))>, we ensures that
    732 //   expr is a compile-time constant.  (Template arguments must be
    733 //   determined at compile-time.)
    734 //
    735 // - The outter parentheses in CompileAssert<(bool(expr))> are necessary
    736 //   to work around a bug in gcc 3.4.4 and 4.0.1.  If we had written
    737 //
    738 //     CompileAssert<bool(expr)>
    739 //
    740 //   instead, these compilers will refuse to compile
    741 //
    742 //     GTEST_COMPILE_ASSERT_(5 > 0, some_message);
    743 //
    744 //   (They seem to think the ">" in "5 > 0" marks the end of the
    745 //   template argument list.)
    746 //
    747 // - The array size is (bool(expr) ? 1 : -1), instead of simply
    748 //
    749 //     ((expr) ? 1 : -1).
    750 //
    751 //   This is to avoid running into a bug in MS VC 7.1, which
    752 //   causes ((0.0) ? 1 : -1) to incorrectly evaluate to 1.
    753 
    754 // StaticAssertTypeEqHelper is used by StaticAssertTypeEq defined in gtest.h.
    755 //
    756 // This template is declared, but intentionally undefined.
    757 template <typename T1, typename T2>
    758 struct StaticAssertTypeEqHelper;
    759 
    760 template <typename T>
    761 struct StaticAssertTypeEqHelper<T, T> {};
    762 
    763 #if GTEST_HAS_GLOBAL_STRING
    764 typedef ::string string;
    765 #else
    766 typedef ::std::string string;
    767 #endif  // GTEST_HAS_GLOBAL_STRING
    768 
    769 #if GTEST_HAS_GLOBAL_WSTRING
    770 typedef ::wstring wstring;
    771 #elif GTEST_HAS_STD_WSTRING
    772 typedef ::std::wstring wstring;
    773 #endif  // GTEST_HAS_GLOBAL_WSTRING
    774 
    775 // A helper for suppressing warnings on constant condition.  It just
    776 // returns 'condition'.
    777 GTEST_API_ bool IsTrue(bool condition);
    778 
    779 // Defines scoped_ptr.
    780 
    781 // This implementation of scoped_ptr is PARTIAL - it only contains
    782 // enough stuff to satisfy Google Test's need.
    783 template <typename T>
    784 class scoped_ptr {
    785  public:
    786   typedef T element_type;
    787 
    788   explicit scoped_ptr(T* p = NULL) : ptr_(p) {}
    789   ~scoped_ptr() { reset(); }
    790 
    791   T& operator*() const { return *ptr_; }
    792   T* operator->() const { return ptr_; }
    793   T* get() const { return ptr_; }
    794 
    795   T* release() {
    796     T* const ptr = ptr_;
    797     ptr_ = NULL;
    798     return ptr;
    799   }
    800 
    801   void reset(T* p = NULL) {
    802     if (p != ptr_) {
    803       if (IsTrue(sizeof(T) > 0)) {  // Makes sure T is a complete type.
    804         delete ptr_;
    805       }
    806       ptr_ = p;
    807     }
    808   }
    809  private:
    810   T* ptr_;
    811 
    812   GTEST_DISALLOW_COPY_AND_ASSIGN_(scoped_ptr);
    813 };
    814 
    815 // Defines RE.
    816 
    817 // A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
    818 // Regular Expression syntax.
    819 class GTEST_API_ RE {
    820  public:
    821   // A copy constructor is required by the Standard to initialize object
    822   // references from r-values.
    823   RE(const RE& other) { Init(other.pattern()); }
    824 
    825   // Constructs an RE from a string.
    826   RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
    827 
    828 #if GTEST_HAS_GLOBAL_STRING
    829 
    830   RE(const ::string& regex) { Init(regex.c_str()); }  // NOLINT
    831 
    832 #endif  // GTEST_HAS_GLOBAL_STRING
    833 
    834   RE(const char* regex) { Init(regex); }  // NOLINT
    835   ~RE();
    836 
    837   // Returns the string representation of the regex.
    838   const char* pattern() const { return pattern_; }
    839 
    840   // FullMatch(str, re) returns true iff regular expression re matches
    841   // the entire str.
    842   // PartialMatch(str, re) returns true iff regular expression re
    843   // matches a substring of str (including str itself).
    844   //
    845   // TODO(wan (at) google.com): make FullMatch() and PartialMatch() work
    846   // when str contains NUL characters.
    847   static bool FullMatch(const ::std::string& str, const RE& re) {
    848     return FullMatch(str.c_str(), re);
    849   }
    850   static bool PartialMatch(const ::std::string& str, const RE& re) {
    851     return PartialMatch(str.c_str(), re);
    852   }
    853 
    854 #if GTEST_HAS_GLOBAL_STRING
    855 
    856   static bool FullMatch(const ::string& str, const RE& re) {
    857     return FullMatch(str.c_str(), re);
    858   }
    859   static bool PartialMatch(const ::string& str, const RE& re) {
    860     return PartialMatch(str.c_str(), re);
    861   }
    862 
    863 #endif  // GTEST_HAS_GLOBAL_STRING
    864 
    865   static bool FullMatch(const char* str, const RE& re);
    866   static bool PartialMatch(const char* str, const RE& re);
    867 
    868  private:
    869   void Init(const char* regex);
    870 
    871   // We use a const char* instead of a string, as Google Test may be used
    872   // where string is not available.  We also do not use Google Test's own
    873   // String type here, in order to simplify dependencies between the
    874   // files.
    875   const char* pattern_;
    876   bool is_valid_;
    877 
    878 #if GTEST_USES_POSIX_RE
    879 
    880   regex_t full_regex_;     // For FullMatch().
    881   regex_t partial_regex_;  // For PartialMatch().
    882 
    883 #else  // GTEST_USES_SIMPLE_RE
    884 
    885   const char* full_pattern_;  // For FullMatch();
    886 
    887 #endif
    888 
    889   GTEST_DISALLOW_ASSIGN_(RE);
    890 };
    891 
    892 // Formats a source file path and a line number as they would appear
    893 // in an error message from the compiler used to compile this code.
    894 GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
    895 
    896 // Formats a file location for compiler-independent XML output.
    897 // Although this function is not platform dependent, we put it next to
    898 // FormatFileLocation in order to contrast the two functions.
    899 GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
    900                                                                int line);
    901 
    902 // Defines logging utilities:
    903 //   GTEST_LOG_(severity) - logs messages at the specified severity level. The
    904 //                          message itself is streamed into the macro.
    905 //   LogToStderr()  - directs all log messages to stderr.
    906 //   FlushInfoLog() - flushes informational log messages.
    907 
    908 enum GTestLogSeverity {
    909   GTEST_INFO,
    910   GTEST_WARNING,
    911   GTEST_ERROR,
    912   GTEST_FATAL
    913 };
    914 
    915 // Formats log entry severity, provides a stream object for streaming the
    916 // log message, and terminates the message with a newline when going out of
    917 // scope.
    918 class GTEST_API_ GTestLog {
    919  public:
    920   GTestLog(GTestLogSeverity severity, const char* file, int line);
    921 
    922   // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
    923   ~GTestLog();
    924 
    925   ::std::ostream& GetStream() { return ::std::cerr; }
    926 
    927  private:
    928   const GTestLogSeverity severity_;
    929 
    930   GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
    931 };
    932 
    933 #define GTEST_LOG_(severity) \
    934     ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
    935                                   __FILE__, __LINE__).GetStream()
    936 
    937 inline void LogToStderr() {}
    938 inline void FlushInfoLog() { fflush(NULL); }
    939 
    940 // INTERNAL IMPLEMENTATION - DO NOT USE.
    941 //
    942 // GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
    943 // is not satisfied.
    944 //  Synopsys:
    945 //    GTEST_CHECK_(boolean_condition);
    946 //     or
    947 //    GTEST_CHECK_(boolean_condition) << "Additional message";
    948 //
    949 //    This checks the condition and if the condition is not satisfied
    950 //    it prints message about the condition violation, including the
    951 //    condition itself, plus additional message streamed into it, if any,
    952 //    and then it aborts the program. It aborts the program irrespective of
    953 //    whether it is built in the debug mode or not.
    954 #define GTEST_CHECK_(condition) \
    955     GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
    956     if (::testing::internal::IsTrue(condition)) \
    957       ; \
    958     else \
    959       GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
    960 
    961 // An all-mode assert to verify that the given POSIX-style function
    962 // call returns 0 (indicating success).  Known limitation: this
    963 // doesn't expand to a balanced 'if' statement, so enclose the macro
    964 // in {} if you need to use it as the only statement in an 'if'
    965 // branch.
    966 #define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
    967   if (const int gtest_error = (posix_call)) \
    968     GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
    969                       << gtest_error
    970 
    971 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
    972 //
    973 // Use ImplicitCast_ as a safe version of static_cast for upcasting in
    974 // the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
    975 // const Foo*).  When you use ImplicitCast_, the compiler checks that
    976 // the cast is safe.  Such explicit ImplicitCast_s are necessary in
    977 // surprisingly many situations where C++ demands an exact type match
    978 // instead of an argument type convertable to a target type.
    979 //
    980 // The syntax for using ImplicitCast_ is the same as for static_cast:
    981 //
    982 //   ImplicitCast_<ToType>(expr)
    983 //
    984 // ImplicitCast_ would have been part of the C++ standard library,
    985 // but the proposal was submitted too late.  It will probably make
    986 // its way into the language in the future.
    987 //
    988 // This relatively ugly name is intentional. It prevents clashes with
    989 // similar functions users may have (e.g., implicit_cast). The internal
    990 // namespace alone is not enough because the function can be found by ADL.
    991 template<typename To>
    992 inline To ImplicitCast_(To x) { return x; }
    993 
    994 // When you upcast (that is, cast a pointer from type Foo to type
    995 // SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
    996 // always succeed.  When you downcast (that is, cast a pointer from
    997 // type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
    998 // how do you know the pointer is really of type SubclassOfFoo?  It
    999 // could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
   1000 // when you downcast, you should use this macro.  In debug mode, we
   1001 // use dynamic_cast<> to double-check the downcast is legal (we die
   1002 // if it's not).  In normal mode, we do the efficient static_cast<>
   1003 // instead.  Thus, it's important to test in debug mode to make sure
   1004 // the cast is legal!
   1005 //    This is the only place in the code we should use dynamic_cast<>.
   1006 // In particular, you SHOULDN'T be using dynamic_cast<> in order to
   1007 // do RTTI (eg code like this:
   1008 //    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
   1009 //    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
   1010 // You should design the code some other way not to need this.
   1011 //
   1012 // This relatively ugly name is intentional. It prevents clashes with
   1013 // similar functions users may have (e.g., down_cast). The internal
   1014 // namespace alone is not enough because the function can be found by ADL.
   1015 template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
   1016 inline To DownCast_(From* f) {  // so we only accept pointers
   1017   // Ensures that To is a sub-type of From *.  This test is here only
   1018   // for compile-time type checking, and has no overhead in an
   1019   // optimized build at run-time, as it will be optimized away
   1020   // completely.
   1021   if (false) {
   1022     const To to = NULL;
   1023     ::testing::internal::ImplicitCast_<From*>(to);
   1024   }
   1025 
   1026 #if GTEST_HAS_RTTI
   1027   // RTTI: debug mode only!
   1028   GTEST_CHECK_(f == NULL || dynamic_cast<To>(f) != NULL);
   1029 #endif
   1030   return static_cast<To>(f);
   1031 }
   1032 
   1033 // Downcasts the pointer of type Base to Derived.
   1034 // Derived must be a subclass of Base. The parameter MUST
   1035 // point to a class of type Derived, not any subclass of it.
   1036 // When RTTI is available, the function performs a runtime
   1037 // check to enforce this.
   1038 template <class Derived, class Base>
   1039 Derived* CheckedDowncastToActualType(Base* base) {
   1040 #if GTEST_HAS_RTTI
   1041   GTEST_CHECK_(typeid(*base) == typeid(Derived));
   1042   return dynamic_cast<Derived*>(base);  // NOLINT
   1043 #else
   1044   return static_cast<Derived*>(base);  // Poor man's downcast.
   1045 #endif
   1046 }
   1047 
   1048 #if GTEST_HAS_STREAM_REDIRECTION
   1049 
   1050 // Defines the stderr capturer:
   1051 //   CaptureStdout     - starts capturing stdout.
   1052 //   GetCapturedStdout - stops capturing stdout and returns the captured string.
   1053 //   CaptureStderr     - starts capturing stderr.
   1054 //   GetCapturedStderr - stops capturing stderr and returns the captured string.
   1055 //
   1056 GTEST_API_ void CaptureStdout();
   1057 GTEST_API_ String GetCapturedStdout();
   1058 GTEST_API_ void CaptureStderr();
   1059 GTEST_API_ String GetCapturedStderr();
   1060 
   1061 #endif  // GTEST_HAS_STREAM_REDIRECTION
   1062 
   1063 
   1064 #if GTEST_HAS_DEATH_TEST
   1065 
   1066 // A copy of all command line arguments.  Set by InitGoogleTest().
   1067 extern ::std::vector<String> g_argvs;
   1068 
   1069 // GTEST_HAS_DEATH_TEST implies we have ::std::string.
   1070 const ::std::vector<String>& GetArgvs();
   1071 
   1072 #endif  // GTEST_HAS_DEATH_TEST
   1073 
   1074 // Defines synchronization primitives.
   1075 
   1076 #if GTEST_HAS_PTHREAD
   1077 
   1078 // Sleeps for (roughly) n milli-seconds.  This function is only for
   1079 // testing Google Test's own constructs.  Don't use it in user tests,
   1080 // either directly or indirectly.
   1081 inline void SleepMilliseconds(int n) {
   1082   const timespec time = {
   1083     0,                  // 0 seconds.
   1084     n * 1000L * 1000L,  // And n ms.
   1085   };
   1086   nanosleep(&time, NULL);
   1087 }
   1088 
   1089 // Allows a controller thread to pause execution of newly created
   1090 // threads until notified.  Instances of this class must be created
   1091 // and destroyed in the controller thread.
   1092 //
   1093 // This class is only for testing Google Test's own constructs. Do not
   1094 // use it in user tests, either directly or indirectly.
   1095 class Notification {
   1096  public:
   1097   Notification() : notified_(false) {}
   1098 
   1099   // Notifies all threads created with this notification to start. Must
   1100   // be called from the controller thread.
   1101   void Notify() { notified_ = true; }
   1102 
   1103   // Blocks until the controller thread notifies. Must be called from a test
   1104   // thread.
   1105   void WaitForNotification() {
   1106     while(!notified_) {
   1107       SleepMilliseconds(10);
   1108     }
   1109   }
   1110 
   1111  private:
   1112   volatile bool notified_;
   1113 
   1114   GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
   1115 };
   1116 
   1117 // As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
   1118 // Consequently, it cannot select a correct instantiation of ThreadWithParam
   1119 // in order to call its Run(). Introducing ThreadWithParamBase as a
   1120 // non-templated base class for ThreadWithParam allows us to bypass this
   1121 // problem.
   1122 class ThreadWithParamBase {
   1123  public:
   1124   virtual ~ThreadWithParamBase();
   1125   virtual void Run() = 0;
   1126 };
   1127 
   1128 // pthread_create() accepts a pointer to a function type with the C linkage.
   1129 // According to the Standard (7.5/1), function types with different linkages
   1130 // are different even if they are otherwise identical.  Some compilers (for
   1131 // example, SunStudio) treat them as different types.  Since class methods
   1132 // cannot be defined with C-linkage we need to define a free C-function to
   1133 // pass into pthread_create().
   1134 extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
   1135   static_cast<ThreadWithParamBase*>(thread)->Run();
   1136   return NULL;
   1137 }
   1138 
   1139 // Helper class for testing Google Test's multi-threading constructs.
   1140 // To use it, write:
   1141 //
   1142 //   void ThreadFunc(int param) { /* Do things with param */ }
   1143 //   Notification thread_can_start;
   1144 //   ...
   1145 //   // The thread_can_start parameter is optional; you can supply NULL.
   1146 //   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
   1147 //   thread_can_start.Notify();
   1148 //
   1149 // These classes are only for testing Google Test's own constructs. Do
   1150 // not use them in user tests, either directly or indirectly.
   1151 template <typename T>
   1152 class ThreadWithParam : public ThreadWithParamBase {
   1153  public:
   1154   typedef void (*UserThreadFunc)(T);
   1155 
   1156   ThreadWithParam(
   1157       UserThreadFunc func, T param, Notification* thread_can_start)
   1158       : func_(func),
   1159         param_(param),
   1160         thread_can_start_(thread_can_start),
   1161         finished_(false) {
   1162     ThreadWithParamBase* const base = this;
   1163     // The thread can be created only after all fields except thread_
   1164     // have been initialized.
   1165     GTEST_CHECK_POSIX_SUCCESS_(
   1166         pthread_create(&thread_, 0, &ThreadFuncWithCLinkage, base));
   1167   }
   1168   ~ThreadWithParam() { Join(); }
   1169 
   1170   void Join() {
   1171     if (!finished_) {
   1172       GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, 0));
   1173       finished_ = true;
   1174     }
   1175   }
   1176 
   1177   virtual void Run() {
   1178     if (thread_can_start_ != NULL)
   1179       thread_can_start_->WaitForNotification();
   1180     func_(param_);
   1181   }
   1182 
   1183  private:
   1184   const UserThreadFunc func_;  // User-supplied thread function.
   1185   const T param_;  // User-supplied parameter to the thread function.
   1186   // When non-NULL, used to block execution until the controller thread
   1187   // notifies.
   1188   Notification* const thread_can_start_;
   1189   bool finished_;  // true iff we know that the thread function has finished.
   1190   pthread_t thread_;  // The native thread object.
   1191 
   1192   GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
   1193 };
   1194 
   1195 // MutexBase and Mutex implement mutex on pthreads-based platforms. They
   1196 // are used in conjunction with class MutexLock:
   1197 //
   1198 //   Mutex mutex;
   1199 //   ...
   1200 //   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the end
   1201 //                            // of the current scope.
   1202 //
   1203 // MutexBase implements behavior for both statically and dynamically
   1204 // allocated mutexes.  Do not use MutexBase directly.  Instead, write
   1205 // the following to define a static mutex:
   1206 //
   1207 //   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
   1208 //
   1209 // You can forward declare a static mutex like this:
   1210 //
   1211 //   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
   1212 //
   1213 // To create a dynamic mutex, just define an object of type Mutex.
   1214 class MutexBase {
   1215  public:
   1216   // Acquires this mutex.
   1217   void Lock() {
   1218     GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
   1219     owner_ = pthread_self();
   1220   }
   1221 
   1222   // Releases this mutex.
   1223   void Unlock() {
   1224     // We don't protect writing to owner_ here, as it's the caller's
   1225     // responsibility to ensure that the current thread holds the
   1226     // mutex when this is called.
   1227     owner_ = 0;
   1228     GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
   1229   }
   1230 
   1231   // Does nothing if the current thread holds the mutex. Otherwise, crashes
   1232   // with high probability.
   1233   void AssertHeld() const {
   1234     GTEST_CHECK_(owner_ == pthread_self())
   1235         << "The current thread is not holding the mutex @" << this;
   1236   }
   1237 
   1238   // A static mutex may be used before main() is entered.  It may even
   1239   // be used before the dynamic initialization stage.  Therefore we
   1240   // must be able to initialize a static mutex object at link time.
   1241   // This means MutexBase has to be a POD and its member variables
   1242   // have to be public.
   1243  public:
   1244   pthread_mutex_t mutex_;  // The underlying pthread mutex.
   1245   pthread_t owner_;  // The thread holding the mutex; 0 means no one holds it.
   1246 };
   1247 
   1248 // Forward-declares a static mutex.
   1249 # define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
   1250     extern ::testing::internal::MutexBase mutex
   1251 
   1252 // Defines and statically (i.e. at link time) initializes a static mutex.
   1253 # define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
   1254     ::testing::internal::MutexBase mutex = { PTHREAD_MUTEX_INITIALIZER, 0 }
   1255 
   1256 // The Mutex class can only be used for mutexes created at runtime. It
   1257 // shares its API with MutexBase otherwise.
   1258 class Mutex : public MutexBase {
   1259  public:
   1260   Mutex() {
   1261     GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, NULL));
   1262     owner_ = 0;
   1263   }
   1264   ~Mutex() {
   1265     GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
   1266   }
   1267 
   1268  private:
   1269   GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
   1270 };
   1271 
   1272 // We cannot name this class MutexLock as the ctor declaration would
   1273 // conflict with a macro named MutexLock, which is defined on some
   1274 // platforms.  Hence the typedef trick below.
   1275 class GTestMutexLock {
   1276  public:
   1277   explicit GTestMutexLock(MutexBase* mutex)
   1278       : mutex_(mutex) { mutex_->Lock(); }
   1279 
   1280   ~GTestMutexLock() { mutex_->Unlock(); }
   1281 
   1282  private:
   1283   MutexBase* const mutex_;
   1284 
   1285   GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
   1286 };
   1287 
   1288 typedef GTestMutexLock MutexLock;
   1289 
   1290 // Helpers for ThreadLocal.
   1291 
   1292 // pthread_key_create() requires DeleteThreadLocalValue() to have
   1293 // C-linkage.  Therefore it cannot be templatized to access
   1294 // ThreadLocal<T>.  Hence the need for class
   1295 // ThreadLocalValueHolderBase.
   1296 class ThreadLocalValueHolderBase {
   1297  public:
   1298   virtual ~ThreadLocalValueHolderBase();
   1299 };
   1300 
   1301 // Called by pthread to delete thread-local data stored by
   1302 // pthread_setspecific().
   1303 extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
   1304   delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
   1305 }
   1306 
   1307 // Implements thread-local storage on pthreads-based systems.
   1308 //
   1309 //   // Thread 1
   1310 //   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
   1311 //
   1312 //   // Thread 2
   1313 //   tl.set(150);  // Changes the value for thread 2 only.
   1314 //   EXPECT_EQ(150, tl.get());
   1315 //
   1316 //   // Thread 1
   1317 //   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
   1318 //   tl.set(200);
   1319 //   EXPECT_EQ(200, tl.get());
   1320 //
   1321 // The template type argument T must have a public copy constructor.
   1322 // In addition, the default ThreadLocal constructor requires T to have
   1323 // a public default constructor.
   1324 //
   1325 // An object managed for a thread by a ThreadLocal instance is deleted
   1326 // when the thread exits.  Or, if the ThreadLocal instance dies in
   1327 // that thread, when the ThreadLocal dies.  It's the user's
   1328 // responsibility to ensure that all other threads using a ThreadLocal
   1329 // have exited when it dies, or the per-thread objects for those
   1330 // threads will not be deleted.
   1331 //
   1332 // Google Test only uses global ThreadLocal objects.  That means they
   1333 // will die after main() has returned.  Therefore, no per-thread
   1334 // object managed by Google Test will be leaked as long as all threads
   1335 // using Google Test have exited when main() returns.
   1336 template <typename T>
   1337 class ThreadLocal {
   1338  public:
   1339   ThreadLocal() : key_(CreateKey()),
   1340                   default_() {}
   1341   explicit ThreadLocal(const T& value) : key_(CreateKey()),
   1342                                          default_(value) {}
   1343 
   1344   ~ThreadLocal() {
   1345     // Destroys the managed object for the current thread, if any.
   1346     DeleteThreadLocalValue(pthread_getspecific(key_));
   1347 
   1348     // Releases resources associated with the key.  This will *not*
   1349     // delete managed objects for other threads.
   1350     GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
   1351   }
   1352 
   1353   T* pointer() { return GetOrCreateValue(); }
   1354   const T* pointer() const { return GetOrCreateValue(); }
   1355   const T& get() const { return *pointer(); }
   1356   void set(const T& value) { *pointer() = value; }
   1357 
   1358  private:
   1359   // Holds a value of type T.
   1360   class ValueHolder : public ThreadLocalValueHolderBase {
   1361    public:
   1362     explicit ValueHolder(const T& value) : value_(value) {}
   1363 
   1364     T* pointer() { return &value_; }
   1365 
   1366    private:
   1367     T value_;
   1368     GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
   1369   };
   1370 
   1371   static pthread_key_t CreateKey() {
   1372     pthread_key_t key;
   1373     // When a thread exits, DeleteThreadLocalValue() will be called on
   1374     // the object managed for that thread.
   1375     GTEST_CHECK_POSIX_SUCCESS_(
   1376         pthread_key_create(&key, &DeleteThreadLocalValue));
   1377     return key;
   1378   }
   1379 
   1380   T* GetOrCreateValue() const {
   1381     ThreadLocalValueHolderBase* const holder =
   1382         static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
   1383     if (holder != NULL) {
   1384       return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
   1385     }
   1386 
   1387     ValueHolder* const new_holder = new ValueHolder(default_);
   1388     ThreadLocalValueHolderBase* const holder_base = new_holder;
   1389     GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
   1390     return new_holder->pointer();
   1391   }
   1392 
   1393   // A key pthreads uses for looking up per-thread values.
   1394   const pthread_key_t key_;
   1395   const T default_;  // The default value for each thread.
   1396 
   1397   GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
   1398 };
   1399 
   1400 # define GTEST_IS_THREADSAFE 1
   1401 
   1402 #else  // GTEST_HAS_PTHREAD
   1403 
   1404 // A dummy implementation of synchronization primitives (mutex, lock,
   1405 // and thread-local variable).  Necessary for compiling Google Test where
   1406 // mutex is not supported - using Google Test in multiple threads is not
   1407 // supported on such platforms.
   1408 
   1409 class Mutex {
   1410  public:
   1411   Mutex() {}
   1412   void AssertHeld() const {}
   1413 };
   1414 
   1415 # define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
   1416   extern ::testing::internal::Mutex mutex
   1417 
   1418 # define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
   1419 
   1420 class GTestMutexLock {
   1421  public:
   1422   explicit GTestMutexLock(Mutex*) {}  // NOLINT
   1423 };
   1424 
   1425 typedef GTestMutexLock MutexLock;
   1426 
   1427 template <typename T>
   1428 class ThreadLocal {
   1429  public:
   1430   ThreadLocal() : value_() {}
   1431   explicit ThreadLocal(const T& value) : value_(value) {}
   1432   T* pointer() { return &value_; }
   1433   const T* pointer() const { return &value_; }
   1434   const T& get() const { return value_; }
   1435   void set(const T& value) { value_ = value; }
   1436  private:
   1437   T value_;
   1438 };
   1439 
   1440 // The above synchronization primitives have dummy implementations.
   1441 // Therefore Google Test is not thread-safe.
   1442 # define GTEST_IS_THREADSAFE 0
   1443 
   1444 #endif  // GTEST_HAS_PTHREAD
   1445 
   1446 // Returns the number of threads running in the process, or 0 to indicate that
   1447 // we cannot detect it.
   1448 GTEST_API_ size_t GetThreadCount();
   1449 
   1450 // Passing non-POD classes through ellipsis (...) crashes the ARM
   1451 // compiler and generates a warning in Sun Studio.  The Nokia Symbian
   1452 // and the IBM XL C/C++ compiler try to instantiate a copy constructor
   1453 // for objects passed through ellipsis (...), failing for uncopyable
   1454 // objects.  We define this to ensure that only POD is passed through
   1455 // ellipsis on these systems.
   1456 #if defined(__SYMBIAN32__) || defined(__IBMCPP__) || defined(__SUNPRO_CC)
   1457 // We lose support for NULL detection where the compiler doesn't like
   1458 // passing non-POD classes through ellipsis (...).
   1459 # define GTEST_ELLIPSIS_NEEDS_POD_ 1
   1460 #else
   1461 # define GTEST_CAN_COMPARE_NULL 1
   1462 #endif
   1463 
   1464 // The Nokia Symbian and IBM XL C/C++ compilers cannot decide between
   1465 // const T& and const T* in a function template.  These compilers
   1466 // _can_ decide between class template specializations for T and T*,
   1467 // so a tr1::type_traits-like is_pointer works.
   1468 #if defined(__SYMBIAN32__) || defined(__IBMCPP__)
   1469 # define GTEST_NEEDS_IS_POINTER_ 1
   1470 #endif
   1471 
   1472 template <bool bool_value>
   1473 struct bool_constant {
   1474   typedef bool_constant<bool_value> type;
   1475   static const bool value = bool_value;
   1476 };
   1477 template <bool bool_value> const bool bool_constant<bool_value>::value;
   1478 
   1479 typedef bool_constant<false> false_type;
   1480 typedef bool_constant<true> true_type;
   1481 
   1482 template <typename T>
   1483 struct is_pointer : public false_type {};
   1484 
   1485 template <typename T>
   1486 struct is_pointer<T*> : public true_type {};
   1487 
   1488 template <typename Iterator>
   1489 struct IteratorTraits {
   1490   typedef typename Iterator::value_type value_type;
   1491 };
   1492 
   1493 template <typename T>
   1494 struct IteratorTraits<T*> {
   1495   typedef T value_type;
   1496 };
   1497 
   1498 template <typename T>
   1499 struct IteratorTraits<const T*> {
   1500   typedef T value_type;
   1501 };
   1502 
   1503 #if GTEST_OS_WINDOWS
   1504 # define GTEST_PATH_SEP_ "\\"
   1505 # define GTEST_HAS_ALT_PATH_SEP_ 1
   1506 // The biggest signed integer type the compiler supports.
   1507 typedef __int64 BiggestInt;
   1508 #else
   1509 # define GTEST_PATH_SEP_ "/"
   1510 # define GTEST_HAS_ALT_PATH_SEP_ 0
   1511 typedef long long BiggestInt;  // NOLINT
   1512 #endif  // GTEST_OS_WINDOWS
   1513 
   1514 // Utilities for char.
   1515 
   1516 // isspace(int ch) and friends accept an unsigned char or EOF.  char
   1517 // may be signed, depending on the compiler (or compiler flags).
   1518 // Therefore we need to cast a char to unsigned char before calling
   1519 // isspace(), etc.
   1520 
   1521 inline bool IsAlpha(char ch) {
   1522   return isalpha(static_cast<unsigned char>(ch)) != 0;
   1523 }
   1524 inline bool IsAlNum(char ch) {
   1525   return isalnum(static_cast<unsigned char>(ch)) != 0;
   1526 }
   1527 inline bool IsDigit(char ch) {
   1528   return isdigit(static_cast<unsigned char>(ch)) != 0;
   1529 }
   1530 inline bool IsLower(char ch) {
   1531   return islower(static_cast<unsigned char>(ch)) != 0;
   1532 }
   1533 inline bool IsSpace(char ch) {
   1534   return isspace(static_cast<unsigned char>(ch)) != 0;
   1535 }
   1536 inline bool IsUpper(char ch) {
   1537   return isupper(static_cast<unsigned char>(ch)) != 0;
   1538 }
   1539 inline bool IsXDigit(char ch) {
   1540   return isxdigit(static_cast<unsigned char>(ch)) != 0;
   1541 }
   1542 
   1543 inline char ToLower(char ch) {
   1544   return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
   1545 }
   1546 inline char ToUpper(char ch) {
   1547   return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
   1548 }
   1549 
   1550 // The testing::internal::posix namespace holds wrappers for common
   1551 // POSIX functions.  These wrappers hide the differences between
   1552 // Windows/MSVC and POSIX systems.  Since some compilers define these
   1553 // standard functions as macros, the wrapper cannot have the same name
   1554 // as the wrapped function.
   1555 
   1556 namespace posix {
   1557 
   1558 // Functions with a different name on Windows.
   1559 
   1560 #if GTEST_OS_WINDOWS
   1561 
   1562 typedef struct _stat StatStruct;
   1563 
   1564 # ifdef __BORLANDC__
   1565 inline int IsATTY(int fd) { return isatty(fd); }
   1566 inline int StrCaseCmp(const char* s1, const char* s2) {
   1567   return stricmp(s1, s2);
   1568 }
   1569 inline char* StrDup(const char* src) { return strdup(src); }
   1570 # else  // !__BORLANDC__
   1571 #  if GTEST_OS_WINDOWS_MOBILE
   1572 inline int IsATTY(int /* fd */) { return 0; }
   1573 #  else
   1574 inline int IsATTY(int fd) { return _isatty(fd); }
   1575 #  endif  // GTEST_OS_WINDOWS_MOBILE
   1576 inline int StrCaseCmp(const char* s1, const char* s2) {
   1577   return _stricmp(s1, s2);
   1578 }
   1579 inline char* StrDup(const char* src) { return _strdup(src); }
   1580 # endif  // __BORLANDC__
   1581 
   1582 # if GTEST_OS_WINDOWS_MOBILE
   1583 inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
   1584 // Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
   1585 // time and thus not defined there.
   1586 # else
   1587 inline int FileNo(FILE* file) { return _fileno(file); }
   1588 inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
   1589 inline int RmDir(const char* dir) { return _rmdir(dir); }
   1590 inline bool IsDir(const StatStruct& st) {
   1591   return (_S_IFDIR & st.st_mode) != 0;
   1592 }
   1593 # endif  // GTEST_OS_WINDOWS_MOBILE
   1594 
   1595 #else
   1596 
   1597 typedef struct stat StatStruct;
   1598 
   1599 inline int FileNo(FILE* file) { return fileno(file); }
   1600 inline int IsATTY(int fd) { return isatty(fd); }
   1601 inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
   1602 inline int StrCaseCmp(const char* s1, const char* s2) {
   1603   return strcasecmp(s1, s2);
   1604 }
   1605 inline char* StrDup(const char* src) { return strdup(src); }
   1606 inline int RmDir(const char* dir) { return rmdir(dir); }
   1607 inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
   1608 
   1609 #endif  // GTEST_OS_WINDOWS
   1610 
   1611 // Functions deprecated by MSVC 8.0.
   1612 
   1613 #ifdef _MSC_VER
   1614 // Temporarily disable warning 4996 (deprecated function).
   1615 # pragma warning(push)
   1616 # pragma warning(disable:4996)
   1617 #endif
   1618 
   1619 inline const char* StrNCpy(char* dest, const char* src, size_t n) {
   1620   return strncpy(dest, src, n);
   1621 }
   1622 
   1623 // ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
   1624 // StrError() aren't needed on Windows CE at this time and thus not
   1625 // defined there.
   1626 
   1627 #if !GTEST_OS_WINDOWS_MOBILE
   1628 inline int ChDir(const char* dir) { return chdir(dir); }
   1629 #endif
   1630 inline FILE* FOpen(const char* path, const char* mode) {
   1631   return fopen(path, mode);
   1632 }
   1633 #if !GTEST_OS_WINDOWS_MOBILE
   1634 inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
   1635   return freopen(path, mode, stream);
   1636 }
   1637 inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
   1638 #endif
   1639 inline int FClose(FILE* fp) { return fclose(fp); }
   1640 #if !GTEST_OS_WINDOWS_MOBILE
   1641 inline int Read(int fd, void* buf, unsigned int count) {
   1642   return static_cast<int>(read(fd, buf, count));
   1643 }
   1644 inline int Write(int fd, const void* buf, unsigned int count) {
   1645   return static_cast<int>(write(fd, buf, count));
   1646 }
   1647 inline int Close(int fd) { return close(fd); }
   1648 inline const char* StrError(int errnum) { return strerror(errnum); }
   1649 #endif
   1650 inline const char* GetEnv(const char* name) {
   1651 #if GTEST_OS_WINDOWS_MOBILE
   1652   // We are on Windows CE, which has no environment variables.
   1653   return NULL;
   1654 #elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
   1655   // Environment variables which we programmatically clear will be set to the
   1656   // empty string rather than unset (NULL).  Handle that case.
   1657   const char* const env = getenv(name);
   1658   return (env != NULL && env[0] != '\0') ? env : NULL;
   1659 #else
   1660   return getenv(name);
   1661 #endif
   1662 }
   1663 
   1664 #ifdef _MSC_VER
   1665 # pragma warning(pop)  // Restores the warning state.
   1666 #endif
   1667 
   1668 #if GTEST_OS_WINDOWS_MOBILE
   1669 // Windows CE has no C library. The abort() function is used in
   1670 // several places in Google Test. This implementation provides a reasonable
   1671 // imitation of standard behaviour.
   1672 void Abort();
   1673 #else
   1674 inline void Abort() { abort(); }
   1675 #endif  // GTEST_OS_WINDOWS_MOBILE
   1676 
   1677 }  // namespace posix
   1678 
   1679 // The maximum number a BiggestInt can represent.  This definition
   1680 // works no matter BiggestInt is represented in one's complement or
   1681 // two's complement.
   1682 //
   1683 // We cannot rely on numeric_limits in STL, as __int64 and long long
   1684 // are not part of standard C++ and numeric_limits doesn't need to be
   1685 // defined for them.
   1686 const BiggestInt kMaxBiggestInt =
   1687     ~(static_cast<BiggestInt>(1) << (8*sizeof(BiggestInt) - 1));
   1688 
   1689 // This template class serves as a compile-time function from size to
   1690 // type.  It maps a size in bytes to a primitive type with that
   1691 // size. e.g.
   1692 //
   1693 //   TypeWithSize<4>::UInt
   1694 //
   1695 // is typedef-ed to be unsigned int (unsigned integer made up of 4
   1696 // bytes).
   1697 //
   1698 // Such functionality should belong to STL, but I cannot find it
   1699 // there.
   1700 //
   1701 // Google Test uses this class in the implementation of floating-point
   1702 // comparison.
   1703 //
   1704 // For now it only handles UInt (unsigned int) as that's all Google Test
   1705 // needs.  Other types can be easily added in the future if need
   1706 // arises.
   1707 template <size_t size>
   1708 class TypeWithSize {
   1709  public:
   1710   // This prevents the user from using TypeWithSize<N> with incorrect
   1711   // values of N.
   1712   typedef void UInt;
   1713 };
   1714 
   1715 // The specialization for size 4.
   1716 template <>
   1717 class TypeWithSize<4> {
   1718  public:
   1719   // unsigned int has size 4 in both gcc and MSVC.
   1720   //
   1721   // As base/basictypes.h doesn't compile on Windows, we cannot use
   1722   // uint32, uint64, and etc here.
   1723   typedef int Int;
   1724   typedef unsigned int UInt;
   1725 };
   1726 
   1727 // The specialization for size 8.
   1728 template <>
   1729 class TypeWithSize<8> {
   1730  public:
   1731 
   1732 #if GTEST_OS_WINDOWS
   1733   typedef __int64 Int;
   1734   typedef unsigned __int64 UInt;
   1735 #else
   1736   typedef long long Int;  // NOLINT
   1737   typedef unsigned long long UInt;  // NOLINT
   1738 #endif  // GTEST_OS_WINDOWS
   1739 };
   1740 
   1741 // Integer types of known sizes.
   1742 typedef TypeWithSize<4>::Int Int32;
   1743 typedef TypeWithSize<4>::UInt UInt32;
   1744 typedef TypeWithSize<8>::Int Int64;
   1745 typedef TypeWithSize<8>::UInt UInt64;
   1746 typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
   1747 
   1748 // Utilities for command line flags and environment variables.
   1749 
   1750 // Macro for referencing flags.
   1751 #define GTEST_FLAG(name) FLAGS_gtest_##name
   1752 
   1753 // Macros for declaring flags.
   1754 #define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
   1755 #define GTEST_DECLARE_int32_(name) \
   1756     GTEST_API_ extern ::testing::internal::Int32 GTEST_FLAG(name)
   1757 #define GTEST_DECLARE_string_(name) \
   1758     GTEST_API_ extern ::testing::internal::String GTEST_FLAG(name)
   1759 
   1760 // Macros for defining flags.
   1761 #define GTEST_DEFINE_bool_(name, default_val, doc) \
   1762     GTEST_API_ bool GTEST_FLAG(name) = (default_val)
   1763 #define GTEST_DEFINE_int32_(name, default_val, doc) \
   1764     GTEST_API_ ::testing::internal::Int32 GTEST_FLAG(name) = (default_val)
   1765 #define GTEST_DEFINE_string_(name, default_val, doc) \
   1766     GTEST_API_ ::testing::internal::String GTEST_FLAG(name) = (default_val)
   1767 
   1768 // Parses 'str' for a 32-bit signed integer.  If successful, writes the result
   1769 // to *value and returns true; otherwise leaves *value unchanged and returns
   1770 // false.
   1771 // TODO(chandlerc): Find a better way to refactor flag and environment parsing
   1772 // out of both gtest-port.cc and gtest.cc to avoid exporting this utility
   1773 // function.
   1774 bool ParseInt32(const Message& src_text, const char* str, Int32* value);
   1775 
   1776 // Parses a bool/Int32/string from the environment variable
   1777 // corresponding to the given Google Test flag.
   1778 bool BoolFromGTestEnv(const char* flag, bool default_val);
   1779 GTEST_API_ Int32 Int32FromGTestEnv(const char* flag, Int32 default_val);
   1780 const char* StringFromGTestEnv(const char* flag, const char* default_val);
   1781 
   1782 }  // namespace internal
   1783 }  // namespace testing
   1784 
   1785 #endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
   1786