Method Write

src/ByteBuffer.cpp:174–214

bool cByteBuffer::Write(const char * a_Bytes, size_t a_Count)
{
	CHECK_THREAD;
	CheckValid();

	// Store the current free space for a check after writing:
	size_t CurFreeSpace = GetFreeSpace();
	size_t CurReadableSpace = GetReadableSpace();
	size_t WrittenBytes = 0;
	
	if (CurFreeSpace < a_Count)
	{
		return false;
	}
	ASSERT(m_BufferSize >= m_WritePos);
	size_t TillEnd = m_BufferSize - m_WritePos;
	if (TillEnd <= a_Count)
	{
		// Need to wrap around the ringbuffer end
		if (TillEnd > 0)
		{
			memcpy(m_Buffer + m_WritePos, a_Bytes, TillEnd);
			a_Bytes += TillEnd;
			a_Count -= TillEnd;
			WrittenBytes = TillEnd;
		}
		m_WritePos = 0;
	}
	
	// We're guaranteed that we'll fit in a single write op
	if (a_Count > 0)
	{
		memcpy(m_Buffer + m_WritePos, a_Bytes, a_Count);
		m_WritePos += a_Count;
		WrittenBytes += a_Count;
	}
	
	ASSERT(GetFreeSpace() == CurFreeSpace - WrittenBytes);
	ASSERT(GetReadableSpace() == CurReadableSpace + WrittenBytes);
	return true;
}