Method FindWord

src/Nazara/Core/String.cpp:1741–1911

	*/

	std::size_t String::FindWord(const char* string, std::intmax_t start, UInt32 flags) const
	{
		if (!string || !string[0] || m_sharedString->size == 0)
			return npos;

		if (start < 0)
			start = std::max<std::size_t>(m_sharedString->size + start, 0);

		std::size_t pos = static_cast<std::size_t>(start);
		if (pos >= m_sharedString->size)
			return npos;

		///Algo 3.FindWord#3 (Size of the pattern unknown)
		const char* ptr = m_sharedString->string.get();
		if (flags & HandleUtf8)
		{
			if (utf8::internal::is_trail(*ptr))
				utf8::unchecked::prior(ptr); // We ensure to have one pointer pointing to the begin of the character

			utf8::unchecked::iterator<const char*> it(ptr);

			if (flags & CaseInsensitive)
			{
				const char* t = string; // utf8(::unchecked)::next affects the iterator on argument
				UInt32 c = Unicode::GetLowercase(utf8::unchecked::next(t));

				do
				{
					if (*it == c)
					{
						if (it.base() != m_sharedString->string.get())
						{
							--it;
							if (!Detail::IsSpace(*it++))
								continue;
						}

						utf8::unchecked::iterator<const char*> p(t);
						utf8::unchecked::iterator<const char*> tIt = it;
						++tIt;

						for (;;)
						{
							if (*p == '\0')
							{
								if (*tIt == '\0' || Detail::IsSpace(*it++))
									return it.base() - m_sharedString->string.get();
								else
									break;
							}

							if (Unicode::GetLowercase(*tIt) != Unicode::GetLowercase(*p))
								break;

							++p;
							++tIt;
						}
					}