Method erase

common/SmallString.cpp:791–844

}

void SmallStringBase::erase(s32 offset, s32 count)
{
	// calc real offset
	u32 real_offset;
	if (offset < 0)
		real_offset = static_cast<u32>(std::max<s32>(0, static_cast<s32>(m_length + offset)));
	else
		real_offset = std::min((u32)offset, m_length);

	// calc real count
	u32 real_count;
	if (count < 0)
	{
		real_count =
			std::min(m_length - real_offset, static_cast<u32>(std::max<s32>(0, static_cast<s32>(m_length) + count)));
	}
	else
	{
		real_count = std::min(m_length - real_offset, static_cast<u32>(count));
	}

	// Fastpath: offset == 0, count < 0, wipe whole string.
	if (real_offset == 0 && real_count == m_length)
	{
		clear();
		return;
	}

	// Fastpath: offset >= 0, count < 0, wipe everything after offset + count
	if ((real_offset + real_count) == m_length)
	{
		m_length -= real_count;
#ifdef _DEBUG
		std::memset(m_buffer + m_length, 0, m_buffer_size - m_length);
#else
		m_buffer[m_length] = 0;
#endif
	}
	// Slowpath: offset >= 0, count < length
	else
	{
		const u32 after_erase_block = m_length - real_offset - real_count;
		pxAssert(after_erase_block > 0);

		std::memmove(m_buffer + offset, m_buffer + real_offset + real_count, after_erase_block);
		m_length = m_length - real_count;

#ifdef _DEBUG
		std::memset(m_buffer + m_length, 0, m_buffer_size - m_length);
#else
		m_buffer[m_length] = 0;
#endif
	}
}