Move core/src/ up to core/.

core/src/fxcodec/jbig2/JBig2_BitStream.cpp

-// Copyright 2015 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "core/src/fxcodec/jbig2/JBig2_BitStream.h"
-
-#include <algorithm>
-
-#include "core/include/fpdfapi/cpdf_stream.h"
-
-CJBig2_BitStream::CJBig2_BitStream(CPDF_StreamAcc* pSrcStream)
-    : m_pBuf(pSrcStream->GetData()),
-      m_dwLength(pSrcStream->GetSize()),
-      m_dwByteIdx(0),
-      m_dwBitIdx(0),
-      m_dwObjNum(pSrcStream->GetStream() ? pSrcStream->GetStream()->GetObjNum()
-                                         : 0) {
-  if (m_dwLength > 256 * 1024 * 1024) {
-    m_dwLength = 0;
-    m_pBuf = nullptr;
-  }
-}
-
-CJBig2_BitStream::~CJBig2_BitStream() {
-}
-
-int32_t CJBig2_BitStream::readNBits(FX_DWORD dwBits, FX_DWORD* dwResult) {
-  FX_DWORD dwBitPos = getBitPos();
-  if (dwBitPos > LengthInBits())
-    return -1;
-
-  *dwResult = 0;
-  if (dwBitPos + dwBits <= LengthInBits())
-    dwBitPos = dwBits;
-  else
-    dwBitPos = LengthInBits() - dwBitPos;
-
-  for (; dwBitPos > 0; --dwBitPos) {
-    *dwResult =
-        (*dwResult << 1) | ((m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01);
-    AdvanceBit();
-  }
-  return 0;
-}
-
-int32_t CJBig2_BitStream::readNBits(FX_DWORD dwBits, int32_t* nResult) {
-  FX_DWORD dwBitPos = getBitPos();
-  if (dwBitPos > LengthInBits())
-    return -1;
-
-  *nResult = 0;
-  if (dwBitPos + dwBits <= LengthInBits())
-    dwBitPos = dwBits;
-  else
-    dwBitPos = LengthInBits() - dwBitPos;
-
-  for (; dwBitPos > 0; --dwBitPos) {
-    *nResult =
-        (*nResult << 1) | ((m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01);
-    AdvanceBit();
-  }
-  return 0;
-}
-
-int32_t CJBig2_BitStream::read1Bit(FX_DWORD* dwResult) {
-  if (!IsInBound())
-    return -1;
-
-  *dwResult = (m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01;
-  AdvanceBit();
-  return 0;
-}
-
-int32_t CJBig2_BitStream::read1Bit(FX_BOOL* bResult) {
-  if (!IsInBound())
-    return -1;
-
-  *bResult = (m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01;
-  AdvanceBit();
-  return 0;
-}
-
-int32_t CJBig2_BitStream::read1Byte(uint8_t* cResult) {
-  if (!IsInBound())
-    return -1;
-
-  *cResult = m_pBuf[m_dwByteIdx];
-  ++m_dwByteIdx;
-  return 0;
-}
-
-int32_t CJBig2_BitStream::readInteger(FX_DWORD* dwResult) {
-  if (m_dwByteIdx + 3 >= m_dwLength)
-    return -1;
-
-  *dwResult = (m_pBuf[m_dwByteIdx] << 24) | (m_pBuf[m_dwByteIdx + 1] << 16) |
-              (m_pBuf[m_dwByteIdx + 2] << 8) | m_pBuf[m_dwByteIdx + 3];
-  m_dwByteIdx += 4;
-  return 0;
-}
-
-int32_t CJBig2_BitStream::readShortInteger(FX_WORD* dwResult) {
-  if (m_dwByteIdx + 1 >= m_dwLength)
-    return -1;
-
-  *dwResult = (m_pBuf[m_dwByteIdx] << 8) | m_pBuf[m_dwByteIdx + 1];
-  m_dwByteIdx += 2;
-  return 0;
-}
-
-void CJBig2_BitStream::alignByte() {
-  if (m_dwBitIdx != 0) {
-    ++m_dwByteIdx;
-    m_dwBitIdx = 0;
-  }
-}
-
-uint8_t CJBig2_BitStream::getCurByte() const {
-  return IsInBound() ? m_pBuf[m_dwByteIdx] : 0;
-}
-
-void CJBig2_BitStream::incByteIdx() {
-  if (IsInBound())
-    ++m_dwByteIdx;
-}
-
-uint8_t CJBig2_BitStream::getCurByte_arith() const {
-  return IsInBound() ? m_pBuf[m_dwByteIdx] : 0xFF;
-}
-
-uint8_t CJBig2_BitStream::getNextByte_arith() const {
-  return m_dwByteIdx + 1 < m_dwLength ? m_pBuf[m_dwByteIdx + 1] : 0xFF;
-}
-
-FX_DWORD CJBig2_BitStream::getOffset() const {
-  return m_dwByteIdx;
-}
-
-void CJBig2_BitStream::setOffset(FX_DWORD dwOffset) {
-  m_dwByteIdx = std::min(dwOffset, m_dwLength);
-}
-
-FX_DWORD CJBig2_BitStream::getBitPos() const {
-  return (m_dwByteIdx << 3) + m_dwBitIdx;
-}
-
-void CJBig2_BitStream::setBitPos(FX_DWORD dwBitPos) {
-  m_dwByteIdx = dwBitPos >> 3;
-  m_dwBitIdx = dwBitPos & 7;
-}
-
-const uint8_t* CJBig2_BitStream::getBuf() const {
-  return m_pBuf;
-}
-
-const uint8_t* CJBig2_BitStream::getPointer() const {
-  return m_pBuf + m_dwByteIdx;
-}
-
-void CJBig2_BitStream::offset(FX_DWORD dwOffset) {
-  m_dwByteIdx += dwOffset;
-}
-
-FX_DWORD CJBig2_BitStream::getByteLeft() const {
-  return m_dwLength - m_dwByteIdx;
-}
-
-void CJBig2_BitStream::AdvanceBit() {
-  if (m_dwBitIdx == 7) {
-    ++m_dwByteIdx;
-    m_dwBitIdx = 0;
-  } else {
-    ++m_dwBitIdx;
-  }
-}
-
-bool CJBig2_BitStream::IsInBound() const {
-  return m_dwByteIdx < m_dwLength;
-}
-
-FX_DWORD CJBig2_BitStream::LengthInBits() const {
-  return m_dwLength << 3;
-}
-
-FX_DWORD CJBig2_BitStream::getObjNum() const {
-  return m_dwObjNum;
-}