gtest-port.h

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#if defined(__GNUC__) && (GTEST_GCC_VER_ >= 30400) && !defined(COMPILER_ICC)
#define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
#else
#define GTEST_MUST_USE_RESULT_
#endif  // __GNUC__ && (GTEST_GCC_VER_ >= 30400) && !COMPILER_ICC

namespace testing {

class Message;

namespace internal {

class String;

// std::strstream is deprecated.  However, we have to use it on
// Windows as std::stringstream won't compile on Windows when
// exceptions are disabled.  We use std::stringstream on other
// platforms to avoid compiler warnings there.
#if GTEST_HAS_STD_STRING
typedef ::std::stringstream StrStream;
#else
typedef ::std::strstream StrStream;
#endif  // GTEST_HAS_STD_STRING

// Defines scoped_ptr.

// This implementation of scoped_ptr is PARTIAL - it only contains
// enough stuff to satisfy Google Test's need.
template <typename T>
class scoped_ptr {
 public:
  explicit scoped_ptr(T* p = NULL) : ptr_(p) {}
  ~scoped_ptr() { reset(); }

  T& operator*() const { return *ptr_; }
  T* operator->() const { return ptr_; }
  T* get() const { return ptr_; }

  T* release() {
    T* const ptr = ptr_;
    ptr_ = NULL;
    return ptr;
  }

  void reset(T* p = NULL) {
    if (p != ptr_) {
      if (sizeof(T) > 0) {  // Makes sure T is a complete type.
        delete ptr_;
      }
      ptr_ = p;
    }
  }
 private:
  T* ptr_;

  GTEST_DISALLOW_COPY_AND_ASSIGN_(scoped_ptr);
};

#ifdef GTEST_HAS_DEATH_TEST

// Defines RE.

// A simple C++ wrapper for <regex.h>.  It uses the POSIX Enxtended
// Regular Expression syntax.
class RE {
 public:
  // Constructs an RE from a string.
#if GTEST_HAS_STD_STRING
  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
#endif  // GTEST_HAS_STD_STRING

#if GTEST_HAS_GLOBAL_STRING
  RE(const ::string& regex) { Init(regex.c_str()); }  // NOLINT
#endif  // GTEST_HAS_GLOBAL_STRING

  RE(const char* regex) { Init(regex); }  // NOLINT
  ~RE();

  // Returns the string representation of the regex.
  const char* pattern() const { return pattern_; }

  // FullMatch(str, re) returns true iff regular expression re matches
  // the entire str.
  // PartialMatch(str, re) returns true iff regular expression re
  // matches a substring of str (including str itself).
  //
  // TODO([e-mail]): make FullMatch() and PartialMatch() work
  // when str contains NUL characters.
#if GTEST_HAS_STD_STRING
  static bool FullMatch(const ::std::string& str, const RE& re) {
    return FullMatch(str.c_str(), re);
  }
  static bool PartialMatch(const ::std::string& str, const RE& re) {
    return PartialMatch(str.c_str(), re);
  }
#endif  // GTEST_HAS_STD_STRING

#if GTEST_HAS_GLOBAL_STRING
  static bool FullMatch(const ::string& str, const RE& re) {
    return FullMatch(str.c_str(), re);
  }
  static bool PartialMatch(const ::string& str, const RE& re) {
    return PartialMatch(str.c_str(), re);
  }
#endif  // GTEST_HAS_GLOBAL_STRING

  static bool FullMatch(const char* str, const RE& re);
  static bool PartialMatch(const char* str, const RE& re);

 private:
  void Init(const char* regex);

  // We use a const char* instead of a string, as Google Test may be used
  // where string is not available.  We also do not use Google Test's own
  // String type here, in order to simplify dependencies between the
  // files.
  const char* pattern_;
  regex_t full_regex_;     // For FullMatch().
  regex_t partial_regex_;  // For PartialMatch().
  bool is_valid_;
};

#endif  // GTEST_HAS_DEATH_TEST

// Defines logging utilities:
//   GTEST_LOG_()   - logs messages at the specified severity level.
//   LogToStderr()  - directs all log messages to stderr.
//   FlushInfoLog() - flushes informational log messages.

enum GTestLogSeverity {
  GTEST_INFO,
  GTEST_WARNING,
  GTEST_ERROR,
  GTEST_FATAL
};

void GTestLog(GTestLogSeverity severity, const char* file,
              int line, const char* msg);

#define GTEST_LOG_(severity, msg)\
    ::testing::internal::GTestLog(\
        ::testing::internal::GTEST_##severity, __FILE__, __LINE__, \
        (::testing::Message() << (msg)).GetString().c_str())

inline void LogToStderr() {}
inline void FlushInfoLog() { fflush(NULL); }

// Defines the stderr capturer:
//   CaptureStderr     - starts capturing stderr.
//   GetCapturedStderr - stops capturing stderr and returns the captured string.

#ifdef GTEST_HAS_DEATH_TEST

// A copy of all command line arguments.  Set by InitGoogleTest().
extern ::std::vector<String> g_argvs;

void CaptureStderr();
// GTEST_HAS_DEATH_TEST implies we have ::std::string.
::std::string GetCapturedStderr();
const ::std::vector<String>& GetArgvs();

#endif  // GTEST_HAS_DEATH_TEST

// Defines synchronization primitives.

// A dummy implementation of synchronization primitives (mutex, lock,
// and thread-local variable).  Necessary for compiling Google Test where
// mutex is not supported - using Google Test in multiple threads is not
// supported on such platforms.

class Mutex {
 public:
  Mutex() {}
  explicit Mutex(int /*unused*/) {}
  void AssertHeld() const {}
  enum { NO_CONSTRUCTOR_NEEDED_FOR_STATIC_MUTEX = 0 };
};

// We cannot call it MutexLock directly as the ctor declaration would
// conflict with a macro named MutexLock, which is defined on some
// platforms.  Hence the typedef trick below.
class GTestMutexLock {
 public:
  explicit GTestMutexLock(Mutex*) {}  // NOLINT
};

typedef GTestMutexLock MutexLock;

template <typename T>
class ThreadLocal {
 public:
  ThreadLocal() : value_() {}
  explicit ThreadLocal(const T& value) : value_(value) {}
  T* pointer() { return &value_; }
  const T* pointer() const { return &value_; }
  const T& get() const { return value_; }
  void set(const T& value) { value_ = value; }
 private:
  T value_;
};

// There's no portable way to detect the number of threads, so we just
// return 0 to indicate that we cannot detect it.
inline size_t GetThreadCount() { return 0; }

// The above synchronization primitives have dummy implementations.
// Therefore Google Test is not thread-safe.
#define GTEST_IS_THREADSAFE 0

#if defined(__SYMBIAN32__) || defined(__IBMCPP__)

// Passing non-POD classes through ellipsis (...) crashes the ARM
// compiler.  The Nokia Symbian and the IBM XL C/C++ compiler try to
// instantiate a copy constructor for objects passed through ellipsis
// (...), failing for uncopyable objects.  We define this to indicate
// the fact.
#define GTEST_ELLIPSIS_NEEDS_COPY_ 1

// The Nokia Symbian and IBM XL C/C++ compilers cannot decide between
// const T& and const T* in a function template.  These compilers
// _can_ decide between class template specializations for T and T*,
// so a tr1::type_traits-like is_pointer works.
#define GTEST_NEEDS_IS_POINTER_ 1

#endif  // defined(__SYMBIAN32__) || defined(__IBMCPP__)

template <bool bool_value>
struct bool_constant {
  typedef bool_constant<bool_value> type;
  static const bool value = bool_value;
};
template <bool bool_value> const bool bool_constant<bool_value>::value;

typedef bool_constant<false> false_type;
typedef bool_constant<true> true_type;

template <typename T>
struct is_pointer : public false_type {};

template <typename T>
struct is_pointer<T*> : public true_type {};

// Defines BiggestInt as the biggest signed integer type the compiler
// supports.

#ifdef GTEST_OS_WINDOWS
typedef __int64 BiggestInt;
#else
typedef long long BiggestInt;  // NOLINT
#endif  // GTEST_OS_WINDOWS

// The maximum number a BiggestInt can represent.  This definition
// works no matter BiggestInt is represented in one's complement or
// two's complement.
//
// We cannot rely on numeric_limits in STL, as __int64 and long long
// are not part of standard C++ and numeric_limits doesn't need to be
// defined for them.
const BiggestInt kMaxBiggestInt =
    ~(static_cast<BiggestInt>(1) << (8*sizeof(BiggestInt) - 1));

// This template class serves as a compile-time function from size to
// type.  It maps a size in bytes to a primitive type with that
// size. e.g.
//
//   TypeWithSize<4>::UInt
//
// is typedef-ed to be unsigned int (unsigned integer made up of 4
// bytes).
//
// Such functionality should belong to STL, but I cannot find it
// there.
//
// Google Test uses this class in the implementation of floating-point
// comparison.
//
// For now it only handles UInt (unsigned int) as that's all Google Test
// needs.  Other types can be easily added in the future if need
// arises.
template <size_t size>
class TypeWithSize {
 public:
  // This prevents the user from using TypeWithSize<N> with incorrect
  // values of N.
  typedef void UInt;
};

// The specialization for size 4.
template <>
class TypeWithSize<4> {
 public:
  // unsigned int has size 4 in both gcc and MSVC.
  //
  // As base/basictypes.h doesn't compile on Windows, we cannot use
  // uint32, uint64, and etc here.
  typedef int Int;
  typedef unsigned int UInt;
};

// The specialization for size 8.
template <>
class TypeWithSize<8> {
 public:
#ifdef GTEST_OS_WINDOWS
  typedef __int64 Int;
  typedef unsigned __int64 UInt;
#else
  typedef long long Int;  // NOLINT
  typedef unsigned long long UInt;  // NOLINT
#endif  // GTEST_OS_WINDOWS
};

// Integer types of known sizes.
typedef TypeWithSize<4>::Int Int32;
typedef TypeWithSize<4>::UInt UInt32;
typedef TypeWithSize<8>::Int Int64;
typedef TypeWithSize<8>::UInt UInt64;
typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.

// Utilities for command line flags and environment variables.

// A wrapper for getenv() that works on Linux, Windows, and Mac OS.
inline const char* GetEnv(const char* name) {
#ifdef _WIN32_WCE  // We are on Windows CE.
  // CE has no environment variables.
  return NULL;
#elif defined(GTEST_OS_WINDOWS)  // We are on Windows proper.
  // MSVC 8 deprecates getenv(), so we want to suppress warning 4996
  // (deprecated function) there.
#pragma warning(push)          // Saves the current warning state.
#pragma warning(disable:4996)  // Temporarily disables warning 4996.
  return getenv(name);
#pragma warning(pop)           // Restores the warning state.
#else  // We are on Linux or Mac OS.
  return getenv(name);
#endif
}

#ifdef _WIN32_WCE
// Windows CE has no C library. The abort() function is used in
// several places in Google Test. This implementation provides a reasonable
// imitation of standard behaviour.
void abort();
#else
inline void abort() { ::abort(); }
#endif  // _WIN32_WCE

// INTERNAL IMPLEMENTATION - DO NOT USE.
//
// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
// is not satisfied.
//  Synopsys:
//    GTEST_CHECK_(boolean_condition);
//     or
//    GTEST_CHECK_(boolean_condition) << "Additional message";
//
//    This checks the condition and if the condition is not satisfied
//    it prints message about the condition violation, including the
//    condition itself, plus additional message streamed into it, if any,
//    and then it aborts the program. It aborts the program irrespective of
//    whether it is built in the debug mode or not.
class GTestCheckProvider {
 public:
  GTestCheckProvider(const char* condition, const char* file, int line) {
    FormatFileLocation(file, line);
    ::std::cerr << " ERROR: Condition " << condition << " failed. ";
  }
  ~GTestCheckProvider() {
    ::std::cerr << ::std::endl;
    abort();
  }
  void FormatFileLocation(const char* file, int line) {
    if (file == NULL)
      file = "unknown file";
    if (line < 0) {
      ::std::cerr << file << ":";
    } else {
#if _MSC_VER
      ::std::cerr << file << "(" << line << "):";
#else
      ::std::cerr << file << ":" << line << ":";
#endif
    }
  }
  ::std::ostream& GetStream() { return ::std::cerr; }
};
#define GTEST_CHECK_(condition) \
    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
    if (condition) \
      ; \
    else \
      ::testing::internal::GTestCheckProvider(\
          #condition, __FILE__, __LINE__).GetStream()

// Macro for referencing flags.
#define GTEST_FLAG(name) FLAGS_gtest_##name

// Macros for declaring flags.
#define GTEST_DECLARE_bool_(name) extern bool GTEST_FLAG(name)
#define GTEST_DECLARE_int32_(name) \
    extern ::testing::internal::Int32 GTEST_FLAG(name)
#define GTEST_DECLARE_string_(name) \
    extern ::testing::internal::String GTEST_FLAG(name)

// Macros for defining flags.
#define GTEST_DEFINE_bool_(name, default_val, doc) \
    bool GTEST_FLAG(name) = (default_val)
#define GTEST_DEFINE_int32_(name, default_val, doc) \
    ::testing::internal::Int32 GTEST_FLAG(name) = (default_val)
#define GTEST_DEFINE_string_(name, default_val, doc) \
    ::testing::internal::String GTEST_FLAG(name) = (default_val)

// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
// to *value and returns true; otherwise leaves *value unchanged and returns
// false.
// TODO(chandlerc): Find a better way to refactor flag and environment parsing
// out of both gtest-port.cc and gtest.cc to avoid exporting this utility
// function.
bool ParseInt32(const Message& src_text, const char* str, Int32* value);

// Parses a bool/Int32/string from the environment variable
// corresponding to the given Google Test flag.
bool BoolFromGTestEnv(const char* flag, bool default_val);
Int32 Int32FromGTestEnv(const char* flag, Int32 default_val);
const char* StringFromGTestEnv(const char* flag, const char* default_val);

}  // namespace internal
}  // namespace testing

#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_