diff options
Diffstat (limited to 'core/fxcrt/fx_basic_buffer.cpp')
-rw-r--r-- | core/fxcrt/fx_basic_buffer.cpp | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/core/fxcrt/fx_basic_buffer.cpp b/core/fxcrt/fx_basic_buffer.cpp index 310aec7faf..b93c1bc9da 100644 --- a/core/fxcrt/fx_basic_buffer.cpp +++ b/core/fxcrt/fx_basic_buffer.cpp @@ -145,47 +145,3 @@ CFX_WideTextBuf& CFX_WideTextBuf::operator<<(const CFX_WideTextBuf& buf) { AppendBlock(buf.m_pBuffer.get(), buf.m_DataSize); return *this; } - -void CFX_BitStream::Init(const uint8_t* pData, uint32_t dwSize) { - m_pData = pData; - m_BitSize = dwSize * 8; - m_BitPos = 0; -} - -void CFX_BitStream::ByteAlign() { - m_BitPos = (m_BitPos + 7) & ~7; -} - -uint32_t CFX_BitStream::GetBits(uint32_t nBits) { - if (nBits > m_BitSize || m_BitPos + nBits > m_BitSize) - return 0; - - if (nBits == 1) { - int bit = (m_pData[m_BitPos / 8] & (1 << (7 - m_BitPos % 8))) ? 1 : 0; - m_BitPos++; - return bit; - } - - uint32_t byte_pos = m_BitPos / 8; - uint32_t bit_pos = m_BitPos % 8; - uint32_t bit_left = nBits; - uint32_t result = 0; - if (bit_pos) { - if (8 - bit_pos >= bit_left) { - result = - (m_pData[byte_pos] & (0xff >> bit_pos)) >> (8 - bit_pos - bit_left); - m_BitPos += bit_left; - return result; - } - bit_left -= 8 - bit_pos; - result = (m_pData[byte_pos++] & ((1 << (8 - bit_pos)) - 1)) << bit_left; - } - while (bit_left >= 8) { - bit_left -= 8; - result |= m_pData[byte_pos++] << bit_left; - } - if (bit_left) - result |= m_pData[byte_pos] >> (8 - bit_left); - m_BitPos += nBits; - return result; -} |