Augment the current scan buffer with another byte - Extra bits are added to right side of existing bitstring INPUT: - nNewByte = 8-bit byte to add to buffer - nPtr = UNUSED PRE: - m_nScanBuff - m_nScanBuff_vacant - m_nScanBuffPtr_num POST: - m_nScanBuff - m_nScanBuff_vacant - m_anScanBuffPtr_err[] - m_anScanBuffPtr_pos[]
| 972 | // - m_anScanBuffPtr_pos[] |
| 973 | // |
| 974 | inline void CimgDecode::ScanBuffAdd(unsigned nNewByte,unsigned nPtr) |
| 975 | { |
| 976 | // Add the new byte to the buffer |
| 977 | // Assume that m_nScanBuff has already been shifted to be |
| 978 | // aligned to bit 31 as first bit. |
| 979 | m_nScanBuff += (nNewByte << (m_nScanBuff_vacant-8)); |
| 980 | m_nScanBuff_vacant -= 8; |
| 981 | |
| 982 | ASSERT(m_nScanBuffPtr_num<4); |
| 983 | if (m_nScanBuffPtr_num>=4) { return; } // Unexpected by design |
| 984 | m_anScanBuffPtr_err[m_nScanBuffPtr_num] = SCANBUF_OK; |
| 985 | m_anScanBuffPtr_pos[m_nScanBuffPtr_num++] = nPtr; |
| 986 | |
| 987 | // m_nScanBuffPtr_align stays the same as we add 8 bits |
| 988 | } |
| 989 | |
| 990 | // Augment the current scan buffer with another byte (but mark as error) |
| 991 | // |
nothing calls this directly
no outgoing calls
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