gtest-port.h

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// Copyright 2005, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: [e-mail] (Zhanyong Wan)
//
// Low-level types and utilities for porting Google Test to various
// platforms.  They are subject to change without notice.  DO NOT USE
// THEM IN USER CODE.

#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_

// The user can define the following macros in the build script to
// control Google Test's behavior.  If the user doesn't define a macro
// in this list, Google Test will define it.
//
//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
//                              is/isn't available.
//   GTEST_HAS_GLOBAL_STRING  - Define it to 1/0 to indicate that ::string
//                              is/isn't available (some systems define
//                              ::string, which is different to std::string).
//   GTEST_HAS_GLOBAL_WSTRING - Define it to 1/0 to indicate that ::string
//                              is/isn't available (some systems define
//                              ::wstring, which is different to std::wstring).
//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
//                              is/isn't available.
//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
//                              enabled.
//   GTEST_HAS_STD_STRING     - Define it to 1/0 to indicate that
//                              std::string does/doesn't work (Google Test can
//                              be used where std::string is unavailable).
//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
//                              std::wstring does/doesn't work (Google Test can
//                              be used where std::wstring is unavailable).
//   GTEST_HAS_TR1_TUPLE 1    - Define it to 1/0 to indicate tr1::tuple
//                              is/isn't available.

// This header defines the following utilities:
//
// Macros indicating the name of the Google C++ Testing Framework project:
//   GTEST_NAME              - a string literal of the project name.
//   GTEST_FLAG_PREFIX       - a string literal of the prefix all Google
//                             Test flag names share.
//   GTEST_FLAG_PREFIX_UPPER - a string literal of the prefix all Google
//                             Test flag names share, in upper case.
//
// Macros indicating the current platform:
//   GTEST_OS_CYGWIN   - defined iff compiled on Cygwin.
//   GTEST_OS_LINUX    - defined iff compiled on Linux.
//   GTEST_OS_MAC      - defined iff compiled on Mac OS X.
//   GTEST_OS_SOLARIS  - defined iff compiled on Sun Solaris.
//   GTEST_OS_SYMBIAN  - defined iff compiled for Symbian.
//   GTEST_OS_WINDOWS  - defined iff compiled on Windows.
//   GTEST_OS_ZOS      - defined iff compiled on IBM z/OS.
//
// Among the platforms, Cygwin, Linux, Max OS X, and Windows have the
// most stable support.  Since core members of the Google Test project
// don't have access to other platforms, support for them may be less
// stable.  If you notice any problems on your platform, please notify
// [e-mail] (patches for fixing them are
// even more welcome!).
//
// Note that it is possible that none of the GTEST_OS_ macros are defined.
//
// Macros indicating available Google Test features:
//   GTEST_HAS_COMBINE      - defined iff Combine construct is supported
//                            in value-parameterized tests.
//   GTEST_HAS_DEATH_TEST   - defined iff death tests are supported.
//   GTEST_HAS_PARAM_TEST   - defined iff value-parameterized tests are
//                            supported.
//   GTEST_HAS_TYPED_TEST   - defined iff typed tests are supported.
//   GTEST_HAS_TYPED_TEST_P - defined iff type-parameterized tests are
//                            supported.
//
// Macros for basic C++ coding:
//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances don't have to
//                              be used.
//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
//
// Synchronization:
//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
//                  - synchronization primitives.
//   GTEST_IS_THREADSAFE - defined to 1 to indicate that the above
//                         synchronization primitives have real implementations
//                         and Google Test is thread-safe; or 0 otherwise.
//
// Template meta programming:
//   is_pointer     - as in TR1; needed on Symbian and IBM XL C/C++ only.
//
// Smart pointers:
//   scoped_ptr     - as in TR2.
//
// Regular expressions:
//   RE             - a simple regular expression class using the POSIX
//                    Extended Regular Expression syntax.  Not available on
//                    Windows.
//
// Logging:
//   GTEST_LOG_()   - logs messages at the specified severity level.
//   LogToStderr()  - directs all log messages to stderr.
//   FlushInfoLog() - flushes informational log messages.
//
// Stderr capturing:
//   CaptureStderr()     - starts capturing stderr.
//   GetCapturedStderr() - stops capturing stderr and returns the captured
//                         string.
//
// Integer types:
//   TypeWithSize   - maps an integer to a int type.
//   Int32, UInt32, Int64, UInt64, TimeInMillis
//                  - integers of known sizes.
//   BiggestInt     - the biggest signed integer type.
//
// Command-line utilities:
//   GTEST_FLAG()       - references a flag.
//   GTEST_DECLARE_*()  - declares a flag.
//   GTEST_DEFINE_*()   - defines a flag.
//   GetArgvs()         - returns the command line as a vector of strings.
//
// Environment variable utilities:
//   GetEnv()             - gets the value of an environment variable.
//   BoolFromGTestEnv()   - parses a bool environment variable.
//   Int32FromGTestEnv()  - parses an Int32 environment variable.
//   StringFromGTestEnv() - parses a string environment variable.

#include <stdlib.h>
#include <stdio.h>
#include <iostream>  // Used for GTEST_CHECK_

#define GTEST_NAME "Google Test"
#define GTEST_FLAG_PREFIX "gtest_"
#define GTEST_FLAG_PREFIX_UPPER "GTEST_"

// Determines the version of gcc that is used to compile this.
#ifdef __GNUC__
// 40302 means version 4.3.2.
#define GTEST_GCC_VER_ \
    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
#endif  // __GNUC__

// Determines the platform on which Google Test is compiled.
#ifdef __CYGWIN__
#define GTEST_OS_CYGWIN
#elif __SYMBIAN32__
#define GTEST_OS_SYMBIAN
#elif defined _MSC_VER
// TODO([e-mail]): GTEST_OS_WINDOWS is currently used to mean
//   both "The OS is Windows" and "The compiler is MSVC".  These
//   meanings really should be separated in order to better support
//   Windows compilers other than MSVC.
#define GTEST_OS_WINDOWS
#elif defined __APPLE__
#define GTEST_OS_MAC
#elif defined __linux__
#define GTEST_OS_LINUX
#elif defined __MVS__
#define GTEST_OS_ZOS
#elif defined(__sun) && defined(__SVR4)
#define GTEST_OS_SOLARIS
#endif  // _MSC_VER

// Determines whether ::std::string and ::string are available.

#ifndef GTEST_HAS_STD_STRING
// The user didn't tell us whether ::std::string is available, so we
// need to figure it out.

#ifdef GTEST_OS_WINDOWS
// Assumes that exceptions are enabled by default.
#ifndef _HAS_EXCEPTIONS
#define _HAS_EXCEPTIONS 1
#endif  // _HAS_EXCEPTIONS
// GTEST_HAS_EXCEPTIONS is non-zero iff exceptions are enabled.  It is
// always defined, while _HAS_EXCEPTIONS is defined only on Windows.
#define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
// On Windows, we can use ::std::string if the compiler version is VS
// 2005 or above, or if exceptions are enabled.
#define GTEST_HAS_STD_STRING ((_MSC_VER >= 1400) || GTEST_HAS_EXCEPTIONS)
#else  // We are on Linux or Mac OS.
#define GTEST_HAS_EXCEPTIONS 0
#define GTEST_HAS_STD_STRING 1
#endif  // GTEST_OS_WINDOWS

#endif  // GTEST_HAS_STD_STRING

#ifndef GTEST_HAS_GLOBAL_STRING
// The user didn't tell us whether ::string is available, so we need
// to figure it out.

#define GTEST_HAS_GLOBAL_STRING 0

#endif  // GTEST_HAS_GLOBAL_STRING

#ifndef GTEST_HAS_STD_WSTRING
// The user didn't tell us whether ::std::wstring is available, so we need
// to figure it out.
// TODO([e-mail]): uses autoconf to detect whether ::std::wstring
//   is available.

#if defined(GTEST_OS_CYGWIN) || defined(GTEST_OS_SOLARIS)
// At least some versions of cygwin don't support ::std::wstring.
// Solaris' libc++ doesn't support it either.
#define GTEST_HAS_STD_WSTRING 0
#else
#define GTEST_HAS_STD_WSTRING GTEST_HAS_STD_STRING
#endif  // defined(GTEST_OS_CYGWIN) || defined(GTEST_OS_SOLARIS)

#endif  // GTEST_HAS_STD_WSTRING

#ifndef GTEST_HAS_GLOBAL_WSTRING
// The user didn't tell us whether ::wstring is available, so we need
// to figure it out.
#define GTEST_HAS_GLOBAL_WSTRING GTEST_HAS_GLOBAL_STRING
#endif  // GTEST_HAS_GLOBAL_WSTRING

#if GTEST_HAS_STD_STRING || GTEST_HAS_GLOBAL_STRING || \
    GTEST_HAS_STD_WSTRING || GTEST_HAS_GLOBAL_WSTRING
#include <string>  // NOLINT
#endif  // GTEST_HAS_STD_STRING || GTEST_HAS_GLOBAL_STRING ||
        // GTEST_HAS_STD_WSTRING || GTEST_HAS_GLOBAL_WSTRING

#if GTEST_HAS_STD_STRING
#include <sstream>  // NOLINT
#else
#include <strstream>  // NOLINT
#endif  // GTEST_HAS_STD_STRING

// Determines whether RTTI is available.
#ifndef GTEST_HAS_RTTI
// The user didn't tell us whether RTTI is enabled, so we need to
// figure it out.

#ifdef _MSC_VER

#ifdef _CPPRTTI  // MSVC defines this macro iff RTTI is enabled.
#define GTEST_HAS_RTTI 1
#else
#define GTEST_HAS_RTTI 0
#endif  // _CPPRTTI

#elif defined(__GNUC__)

// Starting with version 4.3.2, gcc defines __GXX_RTTI iff RTTI is enabled.
#if GTEST_GCC_VER_ >= 40302
#ifdef __GXX_RTTI
#define GTEST_HAS_RTTI 1
#else
#define GTEST_HAS_RTTI 0
#endif  // __GXX_RTTI
#else
// For gcc versions smaller than 4.3.2, we assume RTTI is enabled.
#define GTEST_HAS_RTTI 1
#endif  // GTEST_GCC_VER >= 40302

#else

// Unknown compiler - assume RTTI is enabled.
#define GTEST_HAS_RTTI 1

#endif  // _MSC_VER

#endif  // GTEST_HAS_RTTI

// Determines whether <pthread.h> is available.
#ifndef GTEST_HAS_PTHREAD
// The user didn't tell us, so we need to figure it out.

#if defined(GTEST_OS_LINUX) || defined(GTEST_OS_MAC)
#define GTEST_HAS_PTHREAD 1
#else
#define GTEST_HAS_PTHREAD 0
#endif  // GTEST_OS_LINUX || GTEST_OS_MAC

#endif  // GTEST_HAS_PTHREAD

// Determines whether tr1/tuple is available.  If you have tr1/tuple
// on your platform, define GTEST_HAS_TR1_TUPLE=1 for both the Google
// Test project and your tests. If you would like Google Test to detect
// tr1/tuple on your platform automatically, please open an issue
// ticket at http://code.google.com/p/googletest.
#ifndef GTEST_HAS_TR1_TUPLE
// The user didn't tell us, so we need to figure it out.

// GCC provides <tr1/tuple> since 4.0.0.
#if defined(__GNUC__) && (GTEST_GCC_VER_ >= 40000)
#define GTEST_HAS_TR1_TUPLE 1
#else
#define GTEST_HAS_TR1_TUPLE 0
#endif  // __GNUC__
#endif  // GTEST_HAS_TR1_TUPLE

// To avoid conditional compilation everywhere, we make it
// gtest-port.h's responsibility to #include the header implementing
// tr1/tuple.
#if GTEST_HAS_TR1_TUPLE
#if defined(__GNUC__)
// GCC implements tr1/tuple in the <tr1/tuple> header.  This does not
// conform to the TR1 spec, which requires the header to be <tuple>.
#include <tr1/tuple>
#else
// If the compiler is not GCC, we assume the user is using a
// spec-conforming TR1 implementation.
#include <tuple>
#endif  // __GNUC__
#endif  // GTEST_HAS_TR1_TUPLE

// Determines whether clone(2) is supported.
// Usually it will only be available on Linux, excluding
// Linux on the Itanium architecture.
// Also see http://linux.die.net/man/2/clone.
#ifndef GTEST_HAS_CLONE
// The user didn't tell us, so we need to figure it out.

#if defined(GTEST_OS_LINUX) && !defined(__ia64__)
#define GTEST_HAS_CLONE 1
#else
#define GTEST_HAS_CLONE 0
#endif  // defined(GTEST_OS_LINUX) && !defined(__ia64__)

#endif  // GTEST_HAS_CLONE

// Determines whether to support death tests.
#if GTEST_HAS_STD_STRING && GTEST_HAS_CLONE
#define GTEST_HAS_DEATH_TEST
// On some platforms, <regex.h> needs someone to define size_t, and
// won't compile otherwise.  We can #include it here as we already
// included <stdlib.h>, which is guaranteed to define size_t through
// <stddef.h>.
#include <regex.h>
#include <vector>
#include <fcntl.h>
#include <sys/mman.h>
#endif  // GTEST_HAS_STD_STRING && GTEST_HAS_CLONE

// Determines whether to support value-parameterized tests.

#if defined(__GNUC__) || (_MSC_VER >= 1400)
// TODO([e-mail]): get the implementation rid of vector and list
// to compile on MSVC 7.1.
#define GTEST_HAS_PARAM_TEST
#endif  // defined(__GNUC__) || (_MSC_VER >= 1400)

// Determines whether to support type-driven tests.

// Typed tests need <typeinfo> and variadic macros, which gcc and VC
// 8.0+ support.
#if defined(__GNUC__) || (_MSC_VER >= 1400)
#define GTEST_HAS_TYPED_TEST
#define GTEST_HAS_TYPED_TEST_P
#endif  // defined(__GNUC__) || (_MSC_VER >= 1400)

// Determines whether to support Combine(). This only makes sense when
// value-parameterized tests are enabled.
#if defined(GTEST_HAS_PARAM_TEST) && GTEST_HAS_TR1_TUPLE
#define GTEST_HAS_COMBINE
#endif  // defined(GTEST_HAS_PARAM_TEST) && GTEST_HAS_TR1_TUPLE

// Determines whether the system compiler uses UTF-16 for encoding wide strings.
#if defined(GTEST_OS_WINDOWS) || defined(GTEST_OS_CYGWIN) || \
        defined(GTEST_OS_SYMBIAN)
#define GTEST_WIDE_STRING_USES_UTF16_ 1
#endif

// Defines some utility macros.

// The GNU compiler emits a warning if nested "if" statements are followed by
// an "else" statement and braces are not used to explicitly disambiguate the
// "else" binding.  This leads to problems with code like:
//
//   if (gate)
//     ASSERT_*(condition) << "Some message";
//
// The "switch (0) case 0:" idiom is used to suppress this.
#ifdef __INTEL_COMPILER
#define GTEST_AMBIGUOUS_ELSE_BLOCKER_
#else
#define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0:  // NOLINT
#endif

// Use this annotation at the end of a struct / class definition to
// prevent the compiler from optimizing away instances that are never
// used.  This is useful when all interesting logic happens inside the
// c'tor and / or d'tor.  Example:
//
//   struct Foo {
//     Foo() { ... }
//   } GTEST_ATTRIBUTE_UNUSED_;
#if defined(__GNUC__) && !defined(COMPILER_ICC)
#define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
#else
#define GTEST_ATTRIBUTE_UNUSED_
#endif

// A macro to disallow the evil copy constructor and operator= functions
// This should be used in the private: declarations for a class.
#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type)\
  type(const type &);\
  void operator=(const type &)

// Tell the compiler to warn about unused return values for functions declared
// with this macro.  The macro should be used on function declarations
// following the argument list:
//
//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;