folly::fbstring_detail Namespace Reference

Functions
template<class InIt , class OutIt >
std::pair< InIt, OutIt >	copy_n (InIt b, typename std::iterator_traits< InIt >::difference_type n, OutIt d)
template<class Pod , class T >
void	podFill (Pod *b, Pod *e, T c)
template<class Pod >
void	podCopy (const Pod *b, const Pod *e, Pod *d)
template<class Pod >
void	podMove (const Pod *b, const Pod *e, Pod *d)
void	assume_unreachable ()

Function Documentation

void folly::fbstring_detail::assume_unreachable ( )

inline

Definition at line 202 of file FBString.h.

Referenced by folly::fbstring_core< char >::fbstring_core(), folly::small_vector< Observer< T > *, InlineObservers >::makeSize(), folly::detail::IntegralSizePolicy< SizeType, false >::moveToUninitialized(), folly::detail::IntegralSizePolicy< SizeType, false >::moveToUninitializedEmplace(), folly::fbstring_core< char >::mutableData(), and folly::fbstring_core< char >::reserve().

                                                              {
#if defined(__GNUC__) // Clang also defines __GNUC__
  __builtin_unreachable();
#elif defined(_MSC_VER)
  __assume(0);
#else
  // Well, it's better than nothing.
  std::abort();
#endif
}

template<class InIt , class OutIt >

std::pair<InIt, OutIt> folly::fbstring_detail::copy_n ( InIt  b, typename std::iterator_traits< InIt >::difference_type  n, OutIt  d  )

inline

Definition at line 130 of file FBString.h.

References b.

Referenced by folly::small_vector< Observer< T > *, InlineObservers >::insertImpl(), and folly::basic_fbstring< E, T, A, Storage >::replaceImpl().

             {
  for (; n != 0; --n, ++b, ++d) {
    *d = *b;
  }
  return std::make_pair(b, d);
}

template<class Pod >

void folly::fbstring_detail::podCopy ( const Pod *  b, const Pod *  e, Pod *  d  )

inline

Definition at line 174 of file FBString.h.

References FBSTRING_ASSERT.

Referenced by folly::basic_fbstring< E, T, A, Storage >::append(), folly::basic_fbstring< E, T, A, Storage >::assign(), folly::basic_fbstring< char >::copy(), folly::fbstring_core< Char >::copyMedium(), folly::fbstring_core< Char >::RefCounted::create(), folly::fbstring_core< Char >::initMedium(), folly::fbstring_core< Char >::initSmall(), folly::fbstring_core< Char >::reserveMedium(), folly::fbstring_core< Char >::reserveSmall(), and folly::fbstring_core< Char >::unshare().

                                                        {
  FBSTRING_ASSERT(b != nullptr);
  FBSTRING_ASSERT(e != nullptr);
  FBSTRING_ASSERT(d != nullptr);
  FBSTRING_ASSERT(e >= b);
  FBSTRING_ASSERT(d >= e || d + (e - b) <= b);
  memcpy(d, b, (e - b) * sizeof(Pod));
}

template<class Pod , class T >

void folly::fbstring_detail::podFill ( Pod *  b, Pod *  e, T  c  )

inline

Definition at line 141 of file FBString.h.

References b, c, FBSTRING_ASSERT, and T.

Referenced by folly::basic_fbstring< E, T, A, Storage >::append(), folly::basic_fbstring< char >::basic_fbstring(), folly::basic_fbstring< E, T, A, Storage >::insertImplDiscr(), and folly::basic_fbstring< E, T, A, Storage >::resize().

                                         {
  FBSTRING_ASSERT(b && e && b <= e);
  constexpr auto kUseMemset = sizeof(T) == 1;
  if /* constexpr */ (kUseMemset) {
    memset(b, c, size_t(e - b));
  } else {
    auto const ee = b + ((e - b) & ~7u);
    for (; b != ee; b += 8) {
      b[0] = c;
      b[1] = c;
      b[2] = c;
      b[3] = c;
      b[4] = c;
      b[5] = c;
      b[6] = c;
      b[7] = c;
    }
    // Leftovers
    for (; b != e; ++b) {
      *b = c;
    }
  }
}

template<class Pod >

void folly::fbstring_detail::podMove ( const Pod *  b, const Pod *  e, Pod *  d  )

inline

Definition at line 188 of file FBString.h.

References FBSTRING_ASSERT.

Referenced by folly::basic_fbstring< E, T, A, Storage >::append(), folly::basic_fbstring< E, T, A, Storage >::assign(), folly::basic_fbstring< E, T, A, Storage >::insertImpl(), and folly::basic_fbstring< E, T, A, Storage >::insertImplDiscr().

                                                        {
  FBSTRING_ASSERT(e >= b);
  memmove(d, b, (e - b) * sizeof(*b));
}