| 660 | |
| 661 | |
| 662 | bool cByteBuffer::ReadBuf(void * a_Buffer, size_t a_Count) |
| 663 | { |
| 664 | CHECK_THREAD; |
| 665 | CheckValid(); |
| 666 | NEEDBYTES(a_Count); |
| 667 | char * Dst = (char *)a_Buffer; // So that we can do byte math |
| 668 | ASSERT(m_BufferSize >= m_ReadPos); |
| 669 | size_t BytesToEndOfBuffer = m_BufferSize - m_ReadPos; |
| 670 | if (BytesToEndOfBuffer <= a_Count) |
| 671 | { |
| 672 | // Reading across the ringbuffer end, read the first part and adjust parameters: |
| 673 | if (BytesToEndOfBuffer > 0) |
| 674 | { |
| 675 | memcpy(Dst, m_Buffer + m_ReadPos, BytesToEndOfBuffer); |
| 676 | Dst += BytesToEndOfBuffer; |
| 677 | a_Count -= BytesToEndOfBuffer; |
| 678 | } |
| 679 | m_ReadPos = 0; |
| 680 | } |
| 681 | |
| 682 | // Read the rest of the bytes in a single read (guaranteed to fit): |
| 683 | if (a_Count > 0) |
| 684 | { |
| 685 | memcpy(Dst, m_Buffer + m_ReadPos, a_Count); |
| 686 | m_ReadPos += a_Count; |
| 687 | } |
| 688 | return true; |
| 689 | } |
| 690 | |
| 691 | |
| 692 | |