| // Copyright 2016 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/fpdfapi/fpdf_parser/include/cpdf_stream.h" |
| |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h" |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h" |
| #include "core/fpdfapi/fpdf_parser/include/fpdf_parser_decode.h" |
| |
| CPDF_Stream::CPDF_Stream(uint8_t* pData, FX_DWORD size, CPDF_Dictionary* pDict) |
| : m_pDict(pDict), |
| m_dwSize(size), |
| m_GenNum(kMemoryBasedGenNum), |
| m_pDataBuf(pData) {} |
| |
| CPDF_Stream::~CPDF_Stream() { |
| if (IsMemoryBased()) |
| FX_Free(m_pDataBuf); |
| |
| if (m_pDict) |
| m_pDict->Release(); |
| } |
| |
| CPDF_Object::Type CPDF_Stream::GetType() const { |
| return STREAM; |
| } |
| |
| CPDF_Dictionary* CPDF_Stream::GetDict() const { |
| return m_pDict; |
| } |
| |
| bool CPDF_Stream::IsStream() const { |
| return true; |
| } |
| |
| CPDF_Stream* CPDF_Stream::AsStream() { |
| return this; |
| } |
| |
| const CPDF_Stream* CPDF_Stream::AsStream() const { |
| return this; |
| } |
| |
| void CPDF_Stream::InitStreamInternal(CPDF_Dictionary* pDict) { |
| if (pDict) { |
| if (m_pDict) |
| m_pDict->Release(); |
| m_pDict = pDict; |
| } |
| if (IsMemoryBased()) |
| FX_Free(m_pDataBuf); |
| |
| m_GenNum = 0; |
| m_pFile = nullptr; |
| } |
| |
| void CPDF_Stream::InitStream(uint8_t* pData, |
| FX_DWORD size, |
| CPDF_Dictionary* pDict) { |
| InitStreamInternal(pDict); |
| m_GenNum = kMemoryBasedGenNum; |
| m_pDataBuf = FX_Alloc(uint8_t, size); |
| if (pData) |
| FXSYS_memcpy(m_pDataBuf, pData, size); |
| |
| m_dwSize = size; |
| if (m_pDict) |
| m_pDict->SetAtInteger("Length", size); |
| } |
| |
| CPDF_Object* CPDF_Stream::Clone(FX_BOOL bDirect) const { |
| CPDF_StreamAcc acc; |
| acc.LoadAllData(this, TRUE); |
| FX_DWORD streamSize = acc.GetSize(); |
| CPDF_Dictionary* pDict = GetDict(); |
| if (pDict) |
| pDict = ToDictionary(pDict->Clone(bDirect)); |
| |
| return new CPDF_Stream(acc.DetachData(), streamSize, pDict); |
| } |
| |
| void CPDF_Stream::SetData(const uint8_t* pData, |
| FX_DWORD size, |
| FX_BOOL bCompressed, |
| FX_BOOL bKeepBuf) { |
| if (IsMemoryBased()) |
| FX_Free(m_pDataBuf); |
| m_GenNum = kMemoryBasedGenNum; |
| |
| if (bKeepBuf) { |
| m_pDataBuf = const_cast<uint8_t*>(pData); |
| } else { |
| m_pDataBuf = FX_Alloc(uint8_t, size); |
| if (pData) { |
| FXSYS_memcpy(m_pDataBuf, pData, size); |
| } |
| } |
| m_dwSize = size; |
| if (!m_pDict) |
| m_pDict = new CPDF_Dictionary; |
| m_pDict->SetAtInteger("Length", size); |
| if (!bCompressed) { |
| m_pDict->RemoveAt("Filter"); |
| m_pDict->RemoveAt("DecodeParms"); |
| } |
| } |
| |
| FX_BOOL CPDF_Stream::ReadRawData(FX_FILESIZE offset, |
| uint8_t* buf, |
| FX_DWORD size) const { |
| if (!IsMemoryBased() && m_pFile) |
| return m_pFile->ReadBlock(buf, offset, size); |
| |
| if (m_pDataBuf) |
| FXSYS_memcpy(buf, m_pDataBuf + offset, size); |
| |
| return TRUE; |
| } |
| |
| void CPDF_Stream::InitStreamFromFile(IFX_FileRead* pFile, |
| CPDF_Dictionary* pDict) { |
| InitStreamInternal(pDict); |
| m_pFile = pFile; |
| m_dwSize = (FX_DWORD)pFile->GetSize(); |
| if (m_pDict) |
| m_pDict->SetAtInteger("Length", m_dwSize); |
| } |
| |
| CFX_WideString CPDF_Stream::GetUnicodeText() const { |
| CPDF_StreamAcc stream; |
| stream.LoadAllData(this, FALSE); |
| return PDF_DecodeText(stream.GetData(), stream.GetSize()); |
| } |
| |