diff options
Diffstat (limited to 'xfa/fgas/crt/ifgas_stream.cpp')
| -rw-r--r-- | xfa/fgas/crt/ifgas_stream.cpp | 1481 |
1 files changed, 1481 insertions, 0 deletions
diff --git a/xfa/fgas/crt/ifgas_stream.cpp b/xfa/fgas/crt/ifgas_stream.cpp new file mode 100644 index 0000000000..eef19a59ff --- /dev/null +++ b/xfa/fgas/crt/ifgas_stream.cpp @@ -0,0 +1,1481 @@ +// Copyright 2014 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 "xfa/fgas/crt/ifgas_stream.h" + +#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN32_MOBILE_ || \ + _FX_OS_ == _FX_WIN64_ +#include <io.h> +#endif + +#include <algorithm> +#include <memory> + +#include "third_party/base/ptr_util.h" +#include "xfa/fgas/crt/fgas_codepage.h" + +namespace { + +class IFGAS_StreamImp { + public: + virtual ~IFGAS_StreamImp() {} + + virtual int32_t GetLength() const = 0; + virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) = 0; + virtual int32_t GetPosition() = 0; + virtual bool IsEOF() const = 0; + virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) = 0; + virtual int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) = 0; + virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) = 0; + virtual int32_t WriteString(const wchar_t* pStr, int32_t iLength) = 0; + virtual void Flush() = 0; + virtual bool SetLength(int32_t iLength) = 0; + + protected: + IFGAS_StreamImp(); + + uint32_t GetAccessModes() const { return m_dwAccess; } + void SetAccessModes(uint32_t modes) { m_dwAccess = modes; } + + private: + uint32_t m_dwAccess; +}; + +class CFGAS_FileStreamImp : public IFGAS_StreamImp { + public: + CFGAS_FileStreamImp(); + ~CFGAS_FileStreamImp() override; + + bool LoadFile(const wchar_t* pszSrcFileName, uint32_t dwAccess); + + // IFGAS_StreamImp: + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override; + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override; + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override; + void Flush() override; + bool SetLength(int32_t iLength) override; + + protected: + FXSYS_FILE* m_hFile; + int32_t m_iLength; +}; + +class CFGAS_BufferStreamImp : public IFGAS_StreamImp { + public: + CFGAS_BufferStreamImp(); + ~CFGAS_BufferStreamImp() override {} + + bool LoadBuffer(uint8_t* pData, int32_t iTotalSize, uint32_t dwAccess); + + // IFGAS_StreamImp: + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override; + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override; + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override; + void Flush() override {} + bool SetLength(int32_t iLength) override { return false; } + + protected: + uint8_t* m_pData; + int32_t m_iTotalSize; + int32_t m_iPosition; + int32_t m_iLength; +}; + +class CFGAS_FileReadStreamImp : public IFGAS_StreamImp { + public: + CFGAS_FileReadStreamImp(); + ~CFGAS_FileReadStreamImp() override {} + + bool LoadFileRead(const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead, + uint32_t dwAccess); + + // IFGAS_StreamImp: + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override { return m_iPosition; } + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override; + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override { + return 0; + } + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override { + return 0; + } + void Flush() override {} + bool SetLength(int32_t iLength) override { return false; } + + protected: + CFX_RetainPtr<IFX_SeekableReadStream> m_pFileRead; + int32_t m_iPosition; + int32_t m_iLength; +}; + +class CFGAS_BufferReadStreamImp : public IFGAS_StreamImp { + public: + CFGAS_BufferReadStreamImp(); + ~CFGAS_BufferReadStreamImp() override; + + bool LoadBufferRead(const CFX_RetainPtr<IFX_BufferedReadStream>& pBufferRead, + int32_t iFileSize, + uint32_t dwAccess); + + // IFGAS_StreamImp: + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override { return m_iPosition; } + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override; + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override { + return 0; + } + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override { + return 0; + } + void Flush() override {} + bool SetLength(int32_t iLength) override { return false; } + + private: + CFX_RetainPtr<IFX_BufferedReadStream> m_pBufferRead; + int32_t m_iPosition; + int32_t m_iBufferSize; +}; + +class CFGAS_FileWriteStreamImp : public IFGAS_StreamImp { + public: + CFGAS_FileWriteStreamImp(); + ~CFGAS_FileWriteStreamImp() override {} + + bool LoadFileWrite(const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite, + uint32_t dwAccess); + + // IFGAS_StreamImp: + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override { return m_iPosition; } + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override { return 0; } + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override { + return 0; + } + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override; + void Flush() override; + bool SetLength(int32_t iLength) override { return false; } + + protected: + CFX_RetainPtr<IFX_SeekableWriteStream> m_pFileWrite; + int32_t m_iPosition; +}; + +enum FX_STREAMTYPE { + FX_SREAMTYPE_Unknown = 0, + FX_STREAMTYPE_File, + FX_STREAMTYPE_Buffer, + FX_STREAMTYPE_Stream, + FX_STREAMTYPE_BufferRead, +}; + +class CFGAS_Stream : public IFGAS_Stream { + public: + template <typename T, typename... Args> + friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args); + + bool LoadFile(const wchar_t* pszSrcFileName, uint32_t dwAccess); + bool LoadBuffer(uint8_t* pData, int32_t iTotalSize, uint32_t dwAccess); + bool LoadFileRead(const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead, + uint32_t dwAccess); + bool LoadFileWrite(const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite, + uint32_t dwAccess); + bool LoadBufferRead(const CFX_RetainPtr<IFX_BufferedReadStream>& pBufferRead, + int32_t iFileSize, + uint32_t dwAccess); + + // IFGAS_Stream + uint32_t GetAccessModes() const override; + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override; + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override; + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override; + void Flush() override; + bool SetLength(int32_t iLength) override; + int32_t GetBOM(uint8_t bom[4]) const override; + uint16_t GetCodePage() const override; + uint16_t SetCodePage(uint16_t wCodePage) override; + CFX_RetainPtr<IFGAS_Stream> CreateSharedStream(uint32_t dwAccess, + int32_t iOffset, + int32_t iLength) override; + + protected: + CFGAS_Stream(); + ~CFGAS_Stream() override; + + FX_STREAMTYPE m_eStreamType; + IFGAS_StreamImp* m_pStreamImp; + uint32_t m_dwAccess; + int32_t m_iTotalSize; + int32_t m_iPosition; + int32_t m_iStart; + int32_t m_iLength; + int32_t m_iRefCount; +}; + +class CFGAS_TextStream : public IFGAS_Stream { + public: + template <typename T, typename... Args> + friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args); + + // IFGAS_Stream + uint32_t GetAccessModes() const override; + int32_t GetLength() const override; + int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override; + int32_t GetPosition() override; + bool IsEOF() const override; + int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t ReadString(wchar_t* pStr, int32_t iMaxLength, bool& bEOS) override; + int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override; + int32_t WriteString(const wchar_t* pStr, int32_t iLength) override; + void Flush() override; + bool SetLength(int32_t iLength) override; + int32_t GetBOM(uint8_t bom[4]) const override; + uint16_t GetCodePage() const override; + uint16_t SetCodePage(uint16_t wCodePage) override; + CFX_RetainPtr<IFGAS_Stream> CreateSharedStream(uint32_t dwAccess, + int32_t iOffset, + int32_t iLength) override; + + protected: + explicit CFGAS_TextStream(const CFX_RetainPtr<IFGAS_Stream>& pStream); + ~CFGAS_TextStream() override; + + void InitStream(); + + uint16_t m_wCodePage; + int32_t m_wBOMLength; + uint32_t m_dwBOM; + uint8_t* m_pBuf; + int32_t m_iBufSize; + CFX_RetainPtr<IFGAS_Stream> m_pStreamImp; +}; + +class CFGAS_FileRead : public IFX_SeekableReadStream { + public: + static CFX_RetainPtr<CFGAS_FileRead> Create( + const CFX_RetainPtr<IFGAS_Stream>& pStream); + + explicit CFGAS_FileRead(const CFX_RetainPtr<IFGAS_Stream>& pStream); + ~CFGAS_FileRead() override; + + // IFX_SeekableReadStream + FX_FILESIZE GetSize() override; + bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override; + + protected: + CFX_RetainPtr<IFGAS_Stream> m_pStream; +}; + +int32_t FileLength(FXSYS_FILE* file) { + ASSERT(file); +#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_ + return _filelength(_fileno(file)); +#else + int32_t iPos = FXSYS_ftell(file); + FXSYS_fseek(file, 0, FXSYS_SEEK_END); + int32_t iLen = FXSYS_ftell(file); + FXSYS_fseek(file, iPos, FXSYS_SEEK_SET); + return iLen; +#endif +} + +bool FileSetSize(FXSYS_FILE* file, int32_t size) { + ASSERT(file); +#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_ + return _chsize(_fileno(file), size) == 0; +#elif _FX_OS_ == _FX_WIN32_MOBILE_ + HANDLE hFile = _fileno(file); + uint32_t dwPos = ::SetFilePointer(hFile, 0, 0, FILE_CURRENT); + ::SetFilePointer(hFile, size, 0, FILE_BEGIN); + bool bRet = ::SetEndOfFile(hFile); + ::SetFilePointer(hFile, (int32_t)dwPos, 0, FILE_BEGIN); + return bRet; +#else + return false; +#endif +} + +IFGAS_StreamImp::IFGAS_StreamImp() : m_dwAccess(0) {} + +CFGAS_FileStreamImp::CFGAS_FileStreamImp() : m_hFile(nullptr), m_iLength(0) {} + +CFGAS_FileStreamImp::~CFGAS_FileStreamImp() { + if (m_hFile) + FXSYS_fclose(m_hFile); +} + +bool CFGAS_FileStreamImp::LoadFile(const wchar_t* pszSrcFileName, + uint32_t dwAccess) { + ASSERT(!m_hFile); + ASSERT(pszSrcFileName && FXSYS_wcslen(pszSrcFileName) > 0); +#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN32_MOBILE_ || \ + _FX_OS_ == _FX_WIN64_ + const wchar_t* wsMode; + if (dwAccess & FX_STREAMACCESS_Write) { + if (dwAccess & FX_STREAMACCESS_Append) { + wsMode = L"a+b"; + } else if (dwAccess & FX_STREAMACCESS_Truncate) { + wsMode = L"w+b"; + } else { + wsMode = L"r+b"; + } + } else { + wsMode = L"rb"; + } + m_hFile = FXSYS_wfopen(pszSrcFileName, wsMode); + + if (!m_hFile) { + if (dwAccess & FX_STREAMACCESS_Write) { + if (dwAccess & FX_STREAMACCESS_Create) + m_hFile = FXSYS_wfopen(pszSrcFileName, L"w+b"); + + if (!m_hFile) { + m_hFile = FXSYS_wfopen(pszSrcFileName, L"r+b"); + if (!m_hFile) + return false; + + if (dwAccess & FX_STREAMACCESS_Truncate) + FileSetSize(m_hFile, 0); + } + } else { + return false; + } + } +#else + const char* wsMode = "rb"; + if (dwAccess & FX_STREAMACCESS_Write) { + if (dwAccess & FX_STREAMACCESS_Append) { + wsMode = "a+b"; + } else if (dwAccess & FX_STREAMACCESS_Truncate) { + wsMode = "w+b"; + } else { + wsMode = "r+b"; + } + } + CFX_ByteString szFileName = CFX_ByteString::FromUnicode(pszSrcFileName); + m_hFile = FXSYS_fopen(szFileName.c_str(), wsMode); + if (!m_hFile) { + if (dwAccess & FX_STREAMACCESS_Write) { + if (dwAccess & FX_STREAMACCESS_Create) { + m_hFile = FXSYS_fopen(szFileName.c_str(), "w+b"); + } + if (!m_hFile) { + m_hFile = FXSYS_fopen(szFileName.c_str(), "r+b"); + if (!m_hFile) { + return false; + } + if (dwAccess & FX_STREAMACCESS_Truncate) { + FileSetSize(m_hFile, 0); + } + } + } else { + return false; + } + } +#endif + SetAccessModes(dwAccess); + if ((dwAccess & (FX_STREAMACCESS_Write | FX_STREAMACCESS_Truncate)) == + (FX_STREAMACCESS_Write | FX_STREAMACCESS_Truncate)) { + m_iLength = 0; + } else { + m_iLength = FileLength(m_hFile); + } + return true; +} +int32_t CFGAS_FileStreamImp::GetLength() const { + ASSERT(m_hFile); + return m_iLength; +} +int32_t CFGAS_FileStreamImp::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + ASSERT(m_hFile); + FXSYS_fseek(m_hFile, iOffset, eSeek); + return FXSYS_ftell(m_hFile); +} +int32_t CFGAS_FileStreamImp::GetPosition() { + ASSERT(m_hFile); + return FXSYS_ftell(m_hFile); +} +bool CFGAS_FileStreamImp::IsEOF() const { + ASSERT(m_hFile); + return FXSYS_ftell(m_hFile) >= m_iLength; +} +int32_t CFGAS_FileStreamImp::ReadData(uint8_t* pBuffer, int32_t iBufferSize) { + ASSERT(m_hFile); + ASSERT(pBuffer && iBufferSize > 0); + return FXSYS_fread(pBuffer, 1, iBufferSize, m_hFile); +} +int32_t CFGAS_FileStreamImp::ReadString(wchar_t* pStr, + int32_t iMaxLength, + bool& bEOS) { + ASSERT(m_hFile); + ASSERT(pStr && iMaxLength > 0); + if (m_iLength <= 0) { + return 0; + } + int32_t iPosition = FXSYS_ftell(m_hFile); + int32_t iLen = std::min((m_iLength - iPosition) / 2, iMaxLength); + if (iLen <= 0) { + return 0; + } + iLen = FXSYS_fread(pStr, 2, iLen, m_hFile); + int32_t iCount = 0; + while (*pStr != L'\0' && iCount < iLen) { + pStr++, iCount++; + } + iPosition += iCount * 2; + if (FXSYS_ftell(m_hFile) != iPosition) { + FXSYS_fseek(m_hFile, iPosition, 0); + } + bEOS = (iPosition >= m_iLength); + return iCount; +} +int32_t CFGAS_FileStreamImp::WriteData(const uint8_t* pBuffer, + int32_t iBufferSize) { + ASSERT(m_hFile && (GetAccessModes() & FX_STREAMACCESS_Write) != 0); + ASSERT(pBuffer && iBufferSize > 0); + int32_t iRet = FXSYS_fwrite(pBuffer, 1, iBufferSize, m_hFile); + if (iRet != 0) { + int32_t iPos = FXSYS_ftell(m_hFile); + if (iPos > m_iLength) { + m_iLength = iPos; + } + } + return iRet; +} +int32_t CFGAS_FileStreamImp::WriteString(const wchar_t* pStr, int32_t iLength) { + ASSERT(m_hFile && (GetAccessModes() & FX_STREAMACCESS_Write) != 0); + ASSERT(pStr && iLength > 0); + int32_t iRet = FXSYS_fwrite(pStr, 2, iLength, m_hFile); + if (iRet != 0) { + int32_t iPos = FXSYS_ftell(m_hFile); + if (iPos > m_iLength) { + m_iLength = iPos; + } + } + return iRet; +} +void CFGAS_FileStreamImp::Flush() { + ASSERT(m_hFile && (GetAccessModes() & FX_STREAMACCESS_Write) != 0); + FXSYS_fflush(m_hFile); +} +bool CFGAS_FileStreamImp::SetLength(int32_t iLength) { + ASSERT(m_hFile && (GetAccessModes() & FX_STREAMACCESS_Write) != 0); + bool bRet = FileSetSize(m_hFile, iLength); + m_iLength = FileLength(m_hFile); + return bRet; +} + +CFGAS_FileReadStreamImp::CFGAS_FileReadStreamImp() + : m_pFileRead(nullptr), m_iPosition(0), m_iLength(0) {} + +bool CFGAS_FileReadStreamImp::LoadFileRead( + const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead, + uint32_t dwAccess) { + ASSERT(!m_pFileRead && pFileRead); + if (dwAccess & FX_STREAMACCESS_Write) + return false; + + m_pFileRead = pFileRead; + m_iLength = m_pFileRead->GetSize(); + return true; +} + +int32_t CFGAS_FileReadStreamImp::GetLength() const { + return m_iLength; +} +int32_t CFGAS_FileReadStreamImp::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + switch (eSeek) { + case FX_STREAMSEEK_Begin: + m_iPosition = iOffset; + break; + case FX_STREAMSEEK_Current: + m_iPosition += iOffset; + break; + case FX_STREAMSEEK_End: + m_iPosition = m_iLength + iOffset; + break; + } + if (m_iPosition < 0) { + m_iPosition = 0; + } else if (m_iPosition >= m_iLength) { + m_iPosition = m_iLength; + } + return m_iPosition; +} +bool CFGAS_FileReadStreamImp::IsEOF() const { + return m_iPosition >= m_iLength; +} +int32_t CFGAS_FileReadStreamImp::ReadData(uint8_t* pBuffer, + int32_t iBufferSize) { + ASSERT(m_pFileRead); + ASSERT(pBuffer && iBufferSize > 0); + if (iBufferSize > m_iLength - m_iPosition) { + iBufferSize = m_iLength - m_iPosition; + } + if (m_pFileRead->ReadBlock(pBuffer, m_iPosition, iBufferSize)) { + m_iPosition += iBufferSize; + return iBufferSize; + } + return 0; +} +int32_t CFGAS_FileReadStreamImp::ReadString(wchar_t* pStr, + int32_t iMaxLength, + bool& bEOS) { + ASSERT(m_pFileRead); + ASSERT(pStr && iMaxLength > 0); + iMaxLength = ReadData((uint8_t*)pStr, iMaxLength * 2) / 2; + if (iMaxLength <= 0) { + return 0; + } + int32_t i = 0; + while (i < iMaxLength && pStr[i] != L'\0') { + ++i; + } + bEOS = (m_iPosition >= m_iLength) || pStr[i] == L'\0'; + return i; +} + +CFGAS_BufferReadStreamImp::CFGAS_BufferReadStreamImp() + : m_iPosition(0), m_iBufferSize(0) {} + +CFGAS_BufferReadStreamImp::~CFGAS_BufferReadStreamImp() {} + +bool CFGAS_BufferReadStreamImp::LoadBufferRead( + const CFX_RetainPtr<IFX_BufferedReadStream>& pBufferRead, + int32_t iFileSize, + uint32_t dwAccess) { + ASSERT(!m_pBufferRead && pBufferRead); + if (dwAccess & FX_STREAMACCESS_Write) + return false; + + m_pBufferRead = pBufferRead; + m_iBufferSize = iFileSize; + if (m_iBufferSize >= 0) + return true; + + if (!m_pBufferRead->ReadNextBlock(true)) + return false; + + m_iBufferSize = m_pBufferRead->GetBlockSize(); + while (!m_pBufferRead->IsEOF()) { + m_pBufferRead->ReadNextBlock(false); + m_iBufferSize += m_pBufferRead->GetBlockSize(); + } + return true; +} +int32_t CFGAS_BufferReadStreamImp::GetLength() const { + return m_iBufferSize; +} +int32_t CFGAS_BufferReadStreamImp::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + int32_t iLength = GetLength(); + switch (eSeek) { + case FX_STREAMSEEK_Begin: + m_iPosition = iOffset; + break; + case FX_STREAMSEEK_Current: + m_iPosition += iOffset; + break; + case FX_STREAMSEEK_End: + m_iPosition = iLength + iOffset; + break; + } + if (m_iPosition < 0) { + m_iPosition = 0; + } else if (m_iPosition >= iLength) { + m_iPosition = iLength; + } + return m_iPosition; +} +bool CFGAS_BufferReadStreamImp::IsEOF() const { + return m_pBufferRead ? m_pBufferRead->IsEOF() : true; +} +int32_t CFGAS_BufferReadStreamImp::ReadData(uint8_t* pBuffer, + int32_t iBufferSize) { + ASSERT(m_pBufferRead); + ASSERT(pBuffer && iBufferSize > 0); + int32_t iLength = GetLength(); + if (m_iPosition >= iLength) { + return 0; + } + if (iBufferSize > iLength - m_iPosition) { + iBufferSize = iLength - m_iPosition; + } + uint32_t dwBlockOffset = m_pBufferRead->GetBlockOffset(); + uint32_t dwBlockSize = m_pBufferRead->GetBlockSize(); + if (m_iPosition < (int32_t)dwBlockOffset) { + if (!m_pBufferRead->ReadNextBlock(true)) { + return 0; + } + dwBlockOffset = m_pBufferRead->GetBlockOffset(); + dwBlockSize = m_pBufferRead->GetBlockSize(); + } + while (m_iPosition < (int32_t)dwBlockOffset || + m_iPosition >= (int32_t)(dwBlockOffset + dwBlockSize)) { + if (m_pBufferRead->IsEOF() || !m_pBufferRead->ReadNextBlock(false)) { + break; + } + dwBlockOffset = m_pBufferRead->GetBlockOffset(); + dwBlockSize = m_pBufferRead->GetBlockSize(); + } + if (m_iPosition < (int32_t)dwBlockOffset || + m_iPosition >= (int32_t)(dwBlockOffset + dwBlockSize)) { + return 0; + } + const uint8_t* pBufferTmp = m_pBufferRead->GetBlockBuffer(); + uint32_t dwOffsetTmp = m_iPosition - dwBlockOffset; + uint32_t dwCopySize = + std::min(iBufferSize, (int32_t)(dwBlockSize - dwOffsetTmp)); + FXSYS_memcpy(pBuffer, pBufferTmp + dwOffsetTmp, dwCopySize); + dwOffsetTmp = dwCopySize; + iBufferSize -= dwCopySize; + while (iBufferSize > 0) { + if (!m_pBufferRead->ReadNextBlock(false)) { + break; + } + dwBlockOffset = m_pBufferRead->GetBlockOffset(); + dwBlockSize = m_pBufferRead->GetBlockSize(); + pBufferTmp = m_pBufferRead->GetBlockBuffer(); + dwCopySize = std::min((uint32_t)iBufferSize, dwBlockSize); + FXSYS_memcpy(pBuffer + dwOffsetTmp, pBufferTmp, dwCopySize); + dwOffsetTmp += dwCopySize; + iBufferSize -= dwCopySize; + } + m_iPosition += dwOffsetTmp; + return dwOffsetTmp; +} +int32_t CFGAS_BufferReadStreamImp::ReadString(wchar_t* pStr, + int32_t iMaxLength, + bool& bEOS) { + ASSERT(m_pBufferRead); + ASSERT(pStr && iMaxLength > 0); + iMaxLength = ReadData((uint8_t*)pStr, iMaxLength * 2) / 2; + if (iMaxLength <= 0) { + return 0; + } + int32_t i = 0; + while (i < iMaxLength && pStr[i] != L'\0') { + ++i; + } + bEOS = (m_iPosition >= GetLength()) || pStr[i] == L'\0'; + return i; +} +CFGAS_FileWriteStreamImp::CFGAS_FileWriteStreamImp() + : m_pFileWrite(nullptr), m_iPosition(0) {} + +bool CFGAS_FileWriteStreamImp::LoadFileWrite( + const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite, + uint32_t dwAccess) { + ASSERT(!m_pFileWrite && pFileWrite); + if (dwAccess & FX_STREAMACCESS_Read) + return false; + + if (dwAccess & FX_STREAMACCESS_Append) + m_iPosition = pFileWrite->GetSize(); + + m_pFileWrite = pFileWrite; + return true; +} + +int32_t CFGAS_FileWriteStreamImp::GetLength() const { + if (!m_pFileWrite) + return 0; + + return (int32_t)m_pFileWrite->GetSize(); +} +int32_t CFGAS_FileWriteStreamImp::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + int32_t iLength = GetLength(); + switch (eSeek) { + case FX_STREAMSEEK_Begin: + m_iPosition = iOffset; + break; + case FX_STREAMSEEK_Current: + m_iPosition += iOffset; + break; + case FX_STREAMSEEK_End: + m_iPosition = iLength + iOffset; + break; + } + if (m_iPosition < 0) { + m_iPosition = 0; + } else if (m_iPosition >= iLength) { + m_iPosition = iLength; + } + return m_iPosition; +} +bool CFGAS_FileWriteStreamImp::IsEOF() const { + return m_iPosition >= GetLength(); +} +int32_t CFGAS_FileWriteStreamImp::WriteData(const uint8_t* pBuffer, + int32_t iBufferSize) { + if (!m_pFileWrite) { + return 0; + } + if (m_pFileWrite->WriteBlock(pBuffer, m_iPosition, iBufferSize)) { + m_iPosition += iBufferSize; + } + return iBufferSize; +} +int32_t CFGAS_FileWriteStreamImp::WriteString(const wchar_t* pStr, + int32_t iLength) { + return WriteData((const uint8_t*)pStr, iLength * sizeof(wchar_t)); +} +void CFGAS_FileWriteStreamImp::Flush() { + if (m_pFileWrite) { + m_pFileWrite->Flush(); + } +} +CFGAS_BufferStreamImp::CFGAS_BufferStreamImp() + : m_pData(nullptr), m_iTotalSize(0), m_iPosition(0), m_iLength(0) {} + +bool CFGAS_BufferStreamImp::LoadBuffer(uint8_t* pData, + int32_t iTotalSize, + uint32_t dwAccess) { + ASSERT(!m_pData && pData && iTotalSize > 0); + SetAccessModes(dwAccess); + m_pData = pData; + m_iTotalSize = iTotalSize; + m_iPosition = 0; + m_iLength = (dwAccess & FX_STREAMACCESS_Write) != 0 ? 0 : iTotalSize; + return true; +} +int32_t CFGAS_BufferStreamImp::GetLength() const { + ASSERT(m_pData); + return m_iLength; +} +int32_t CFGAS_BufferStreamImp::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + ASSERT(m_pData); + if (eSeek == FX_STREAMSEEK_Begin) { + m_iPosition = iOffset; + } else if (eSeek == FX_STREAMSEEK_Current) { + m_iPosition += iOffset; + } else if (eSeek == FX_STREAMSEEK_End) { + m_iPosition = m_iLength + iOffset; + } + if (m_iPosition > m_iLength) { + m_iPosition = m_iLength; + } + if (m_iPosition < 0) { + m_iPosition = 0; + } + return m_iPosition; +} +int32_t CFGAS_BufferStreamImp::GetPosition() { + ASSERT(m_pData); + return m_iPosition; +} +bool CFGAS_BufferStreamImp::IsEOF() const { + ASSERT(m_pData); + return m_iPosition >= m_iLength; +} +int32_t CFGAS_BufferStreamImp::ReadData(uint8_t* pBuffer, int32_t iBufferSize) { + ASSERT(m_pData); + ASSERT(pBuffer && iBufferSize > 0); + int32_t iLen = std::min(m_iLength - m_iPosition, iBufferSize); + if (iLen <= 0) { + return 0; + } + FXSYS_memcpy(pBuffer, m_pData + m_iPosition, iLen); + m_iPosition += iLen; + return iLen; +} +int32_t CFGAS_BufferStreamImp::ReadString(wchar_t* pStr, + int32_t iMaxLength, + bool& bEOS) { + ASSERT(m_pData); + ASSERT(pStr && iMaxLength > 0); + int32_t iLen = std::min((m_iLength - m_iPosition) / 2, iMaxLength); + if (iLen <= 0) { + return 0; + } + const wchar_t* pSrc = (const wchar_t*)(char*)(m_pData + m_iPosition); + int32_t iCount = 0; + while (*pSrc && iCount < iLen) { + *pStr++ = *pSrc++; + iCount++; + } + m_iPosition += iCount * 2; + bEOS = (*pSrc == L'\0') || (m_iPosition >= m_iLength); + return iCount; +} +int32_t CFGAS_BufferStreamImp::WriteData(const uint8_t* pBuffer, + int32_t iBufferSize) { + ASSERT(m_pData && (GetAccessModes() & FX_STREAMACCESS_Write) != 0); + ASSERT(pBuffer && iBufferSize > 0); + int32_t iLen = std::min(m_iTotalSize - m_iPosition, iBufferSize); + if (iLen <= 0) { + return 0; + } + FXSYS_memcpy(m_pData + m_iPosition, pBuffer, iLen); + m_iPosition += iLen; + if (m_iPosition > m_iLength) { + m_iLength = m_iPosition; + } + return iLen; +} +int32_t CFGAS_BufferStreamImp::WriteString(const wchar_t* pStr, + int32_t iLength) { + ASSERT(m_pData && (GetAccessModes() & FX_STREAMACCESS_Write) != 0); + ASSERT(pStr && iLength > 0); + int32_t iLen = std::min((m_iTotalSize - m_iPosition) / 2, iLength); + if (iLen <= 0) { + return 0; + } + FXSYS_memcpy(m_pData + m_iPosition, pStr, iLen * 2); + m_iPosition += iLen * 2; + if (m_iPosition > m_iLength) { + m_iLength = m_iPosition; + } + return iLen; +} + +CFGAS_TextStream::CFGAS_TextStream(const CFX_RetainPtr<IFGAS_Stream>& pStream) + : m_wCodePage(FX_CODEPAGE_DefANSI), + m_wBOMLength(0), + m_dwBOM(0), + m_pBuf(nullptr), + m_iBufSize(0), + m_pStreamImp(pStream) { + ASSERT(m_pStreamImp); + InitStream(); +} + +CFGAS_TextStream::~CFGAS_TextStream() { + if (m_pBuf) + FX_Free(m_pBuf); +} + +void CFGAS_TextStream::InitStream() { + int32_t iPosition = m_pStreamImp->GetPosition(); + m_pStreamImp->Seek(FX_STREAMSEEK_Begin, 0); + m_pStreamImp->ReadData((uint8_t*)&m_dwBOM, 3); +#if _FX_ENDIAN_ == _FX_LITTLE_ENDIAN_ + m_dwBOM &= 0x00FFFFFF; + if (m_dwBOM == 0x00BFBBEF) { + m_wBOMLength = 3; + m_wCodePage = FX_CODEPAGE_UTF8; + } else { + m_dwBOM &= 0x0000FFFF; + if (m_dwBOM == 0x0000FFFE) { + m_wBOMLength = 2; + m_wCodePage = FX_CODEPAGE_UTF16BE; + } else if (m_dwBOM == 0x0000FEFF) { + m_wBOMLength = 2; + m_wCodePage = FX_CODEPAGE_UTF16LE; + } else { + m_wBOMLength = 0; + m_dwBOM = 0; + m_wCodePage = FXSYS_GetACP(); + } + } +#else + m_dwBOM &= 0xFFFFFF00; + if (m_dwBOM == 0xEFBBBF00) { + m_wBOMLength = 3; + m_wCodePage = FX_CODEPAGE_UTF8; + } else { + m_dwBOM &= 0xFFFF0000; + if (m_dwBOM == 0xFEFF0000) { + m_wBOMLength = 2; + m_wCodePage = FX_CODEPAGE_UTF16BE; + } else if (m_dwBOM == 0xFFFE0000) { + m_wBOMLength = 2; + m_wCodePage = FX_CODEPAGE_UTF16LE; + } else { + m_wBOMLength = 0; + m_dwBOM = 0; + m_wCodePage = FXSYS_GetACP(); + } + } +#endif + m_pStreamImp->Seek(FX_STREAMSEEK_Begin, std::max(m_wBOMLength, iPosition)); +} + +uint32_t CFGAS_TextStream::GetAccessModes() const { + return m_pStreamImp->GetAccessModes() | FX_STREAMACCESS_Text; +} + +int32_t CFGAS_TextStream::GetLength() const { + return m_pStreamImp->GetLength(); +} + +int32_t CFGAS_TextStream::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + return m_pStreamImp->Seek(eSeek, iOffset); +} + +int32_t CFGAS_TextStream::GetPosition() { + return m_pStreamImp->GetPosition(); +} + +bool CFGAS_TextStream::IsEOF() const { + return m_pStreamImp->IsEOF(); +} + +int32_t CFGAS_TextStream::ReadData(uint8_t* pBuffer, int32_t iBufferSize) { + return m_pStreamImp->ReadData(pBuffer, iBufferSize); +} + +int32_t CFGAS_TextStream::WriteData(const uint8_t* pBuffer, + int32_t iBufferSize) { + return m_pStreamImp->WriteData(pBuffer, iBufferSize); +} + +void CFGAS_TextStream::Flush() { + m_pStreamImp->Flush(); +} + +bool CFGAS_TextStream::SetLength(int32_t iLength) { + return m_pStreamImp->SetLength(iLength); +} + +uint16_t CFGAS_TextStream::GetCodePage() const { + return m_wCodePage; +} + +CFX_RetainPtr<IFGAS_Stream> CFGAS_TextStream::CreateSharedStream( + uint32_t dwAccess, + int32_t iOffset, + int32_t iLength) { + CFX_RetainPtr<IFGAS_Stream> pSR = + m_pStreamImp->CreateSharedStream(dwAccess, iOffset, iLength); + if (!pSR) + return nullptr; + + if (dwAccess & FX_STREAMACCESS_Text) + return pdfium::MakeRetain<CFGAS_TextStream>(pSR); + + return pSR; +} + +int32_t CFGAS_TextStream::GetBOM(uint8_t bom[4]) const { + if (m_wBOMLength < 1) + return 0; + + *(uint32_t*)bom = m_dwBOM; + return m_wBOMLength; +} + +uint16_t CFGAS_TextStream::SetCodePage(uint16_t wCodePage) { + if (m_wBOMLength > 0) + return m_wCodePage; + + uint16_t v = m_wCodePage; + m_wCodePage = wCodePage; + return v; +} + +int32_t CFGAS_TextStream::ReadString(wchar_t* pStr, + int32_t iMaxLength, + bool& bEOS) { + ASSERT(pStr && iMaxLength > 0); + if (!m_pStreamImp) { + return -1; + } + int32_t iLen; + if (m_wCodePage == FX_CODEPAGE_UTF16LE || + m_wCodePage == FX_CODEPAGE_UTF16BE) { + int32_t iBytes = iMaxLength * 2; + iLen = m_pStreamImp->ReadData((uint8_t*)pStr, iBytes); + iMaxLength = iLen / 2; + if (sizeof(wchar_t) > 2) { + FX_UTF16ToWChar(pStr, iMaxLength); + } +#if _FX_ENDIAN_ == _FX_BIG_ENDIAN_ + if (m_wCodePage == FX_CODEPAGE_UTF16LE) { + FX_SwapByteOrder(pStr, iMaxLength); + } +#else + if (m_wCodePage == FX_CODEPAGE_UTF16BE) { + FX_SwapByteOrder(pStr, iMaxLength); + } +#endif + } else { + int32_t pos = m_pStreamImp->GetPosition(); + int32_t iBytes = iMaxLength; + iBytes = std::min(iBytes, m_pStreamImp->GetLength() - pos); + if (iBytes > 0) { + if (!m_pBuf) { + m_pBuf = FX_Alloc(uint8_t, iBytes); + m_iBufSize = iBytes; + } else if (iBytes > m_iBufSize) { + m_pBuf = FX_Realloc(uint8_t, m_pBuf, iBytes); + m_iBufSize = iBytes; + } + iLen = m_pStreamImp->ReadData(m_pBuf, iBytes); + int32_t iSrc = iLen; + int32_t iDecode = FX_DecodeString(m_wCodePage, (const char*)m_pBuf, &iSrc, + pStr, &iMaxLength, true); + m_pStreamImp->Seek(FX_STREAMSEEK_Current, iSrc - iLen); + if (iDecode < 1) { + return -1; + } + } else { + iMaxLength = 0; + } + } + bEOS = m_pStreamImp->IsEOF(); + return iMaxLength; +} + +int32_t CFGAS_TextStream::WriteString(const wchar_t* pStr, int32_t iLength) { + ASSERT(pStr && iLength > 0); + if ((m_pStreamImp->GetAccessModes() & FX_STREAMACCESS_Write) == 0) + return -1; + + if (m_wCodePage == FX_CODEPAGE_UTF8) { + int32_t len = iLength; + CFX_UTF8Encoder encoder; + while (len-- > 0) { + encoder.Input(*pStr++); + } + CFX_ByteStringC bsResult = encoder.GetResult(); + m_pStreamImp->WriteData((const uint8_t*)bsResult.c_str(), + bsResult.GetLength()); + } + return iLength; +} + +CFGAS_Stream::CFGAS_Stream() + : m_eStreamType(FX_SREAMTYPE_Unknown), + m_pStreamImp(nullptr), + m_dwAccess(0), + m_iTotalSize(0), + m_iPosition(0), + m_iStart(0), + m_iLength(0), + m_iRefCount(1) {} + +CFGAS_Stream::~CFGAS_Stream() { + if (m_eStreamType != FX_STREAMTYPE_Stream) + delete m_pStreamImp; +} + +bool CFGAS_Stream::LoadFile(const wchar_t* pszSrcFileName, uint32_t dwAccess) { + if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp) + return false; + + if (!pszSrcFileName || FXSYS_wcslen(pszSrcFileName) < 1) + return false; + + std::unique_ptr<CFGAS_FileStreamImp> pImp(new CFGAS_FileStreamImp()); + if (!pImp->LoadFile(pszSrcFileName, dwAccess)) + return false; + + m_pStreamImp = pImp.release(); + m_eStreamType = FX_STREAMTYPE_File; + m_dwAccess = dwAccess; + m_iLength = m_pStreamImp->GetLength(); + return true; +} + +bool CFGAS_Stream::LoadFileRead( + const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead, + uint32_t dwAccess) { + if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp) + return false; + + if (!pFileRead) + return false; + + std::unique_ptr<CFGAS_FileReadStreamImp> pImp(new CFGAS_FileReadStreamImp()); + if (!pImp->LoadFileRead(pFileRead, dwAccess)) + return false; + + m_pStreamImp = pImp.release(); + m_eStreamType = FX_STREAMTYPE_File; + m_dwAccess = dwAccess; + m_iLength = m_pStreamImp->GetLength(); + return true; +} + +bool CFGAS_Stream::LoadFileWrite( + const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite, + uint32_t dwAccess) { + if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp) + return false; + + if (!pFileWrite) + return false; + + auto pImp = pdfium::MakeUnique<CFGAS_FileWriteStreamImp>(); + if (!pImp->LoadFileWrite(pFileWrite, dwAccess)) + return false; + + m_pStreamImp = pImp.release(); + m_eStreamType = FX_STREAMTYPE_File; + m_dwAccess = dwAccess; + m_iLength = m_pStreamImp->GetLength(); + return true; +} + +bool CFGAS_Stream::LoadBuffer(uint8_t* pData, + int32_t iTotalSize, + uint32_t dwAccess) { + if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp) + return false; + + if (!pData || iTotalSize < 1) + return false; + + std::unique_ptr<CFGAS_BufferStreamImp> pImp(new CFGAS_BufferStreamImp()); + if (!pImp->LoadBuffer(pData, iTotalSize, dwAccess)) + return false; + + m_pStreamImp = pImp.release(); + m_eStreamType = FX_STREAMTYPE_Buffer; + m_dwAccess = dwAccess; + m_iLength = m_pStreamImp->GetLength(); + return true; +} + +bool CFGAS_Stream::LoadBufferRead( + const CFX_RetainPtr<IFX_BufferedReadStream>& pBufferRead, + int32_t iFileSize, + uint32_t dwAccess) { + if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp) + return false; + + if (!pBufferRead) + return false; + + auto pImp = pdfium::MakeUnique<CFGAS_BufferReadStreamImp>(); + if (!pImp->LoadBufferRead(pBufferRead, iFileSize, dwAccess)) + return false; + + m_pStreamImp = pImp.release(); + m_eStreamType = FX_STREAMTYPE_BufferRead; + m_dwAccess = dwAccess; + m_iLength = m_pStreamImp->GetLength(); + return true; +} + +uint32_t CFGAS_Stream::GetAccessModes() const { + return m_dwAccess; +} + +int32_t CFGAS_Stream::GetLength() const { + if (!m_pStreamImp) { + return -1; + } + if (m_eStreamType == FX_STREAMTYPE_File || + m_eStreamType == FX_STREAMTYPE_Buffer) { + return m_pStreamImp->GetLength(); + } + return m_iLength; +} +int32_t CFGAS_Stream::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { + if (!m_pStreamImp) { + return -1; + } + if (m_eStreamType == FX_STREAMTYPE_File || + m_eStreamType == FX_STREAMTYPE_Buffer) { + return m_iPosition = m_pStreamImp->Seek(eSeek, iOffset); + } + int32_t iEnd = m_iStart + m_iLength; + int32_t iPosition = m_iStart + iOffset; + if (eSeek == FX_STREAMSEEK_Begin) { + m_iPosition = iPosition; + } else if (eSeek == FX_STREAMSEEK_Current) { + m_iPosition += iOffset; + } else if (eSeek == FX_STREAMSEEK_End) { + m_iPosition = iEnd + iOffset; + } + if (m_iPosition > iEnd) { + m_iPosition = iEnd; + } + if (m_iPosition < m_iStart) { + m_iPosition = m_iStart; + } + return m_iPosition - m_iStart; +} +int32_t CFGAS_Stream::GetPosition() { + if (!m_pStreamImp) { + return -1; + } + if (m_eStreamType == FX_STREAMTYPE_File || + m_eStreamType == FX_STREAMTYPE_Buffer) { + return m_iPosition = m_pStreamImp->GetPosition(); + } + return m_iPosition - m_iStart; +} +bool CFGAS_Stream::IsEOF() const { + if (!m_pStreamImp) { + return true; + } + if (m_eStreamType == FX_STREAMTYPE_File || + m_eStreamType == FX_STREAMTYPE_Buffer) { + return m_pStreamImp->IsEOF(); + } + return m_iPosition >= m_iStart + m_iLength; +} +int32_t CFGAS_Stream::ReadData(uint8_t* pBuffer, int32_t iBufferSize) { + ASSERT(pBuffer && iBufferSize > 0); + if (!m_pStreamImp) { + return -1; + } + int32_t iLen = std::min(m_iStart + m_iLength - m_iPosition, iBufferSize); + if (iLen <= 0) { + return 0; + } + if (m_pStreamImp->GetPosition() != m_iPosition) { + m_pStreamImp->Seek(FX_STREAMSEEK_Begin, m_iPosition); + } + iLen = m_pStreamImp->ReadData(pBuffer, iLen); + m_iPosition = m_pStreamImp->GetPosition(); + return iLen; +} +int32_t CFGAS_Stream::ReadString(wchar_t* pStr, + int32_t iMaxLength, + bool& bEOS) { + ASSERT(pStr && iMaxLength > 0); + if (!m_pStreamImp) { + return -1; + } + int32_t iEnd = m_iStart + m_iLength; + int32_t iLen = iEnd - m_iPosition; + iLen = std::min(iEnd / 2, iMaxLength); + if (iLen <= 0) { + return 0; + } + if (m_pStreamImp->GetPosition() != m_iPosition) { + m_pStreamImp->Seek(FX_STREAMSEEK_Begin, m_iPosition); + } + iLen = m_pStreamImp->ReadString(pStr, iLen, bEOS); + m_iPosition = m_pStreamImp->GetPosition(); + if (iLen > 0 && m_iPosition >= iEnd) { + bEOS = true; + } + return iLen; +} + +int32_t CFGAS_Stream::WriteData(const uint8_t* pBuffer, int32_t iBufferSize) { + ASSERT(pBuffer && iBufferSize > 0); + if (!m_pStreamImp) { + return -1; + } + if ((m_dwAccess & FX_STREAMACCESS_Write) == 0) { + return -1; + } + int32_t iLen = iBufferSize; + if (m_eStreamType == FX_STREAMTYPE_Stream) { + iLen = std::min(m_iStart + m_iTotalSize - m_iPosition, iBufferSize); + if (iLen <= 0) { + return 0; + } + } + int32_t iEnd = m_iStart + m_iLength; + if (m_pStreamImp->GetPosition() != m_iPosition) { + m_pStreamImp->Seek(FX_STREAMSEEK_Begin, m_iPosition); + } + iLen = m_pStreamImp->WriteData(pBuffer, iLen); + m_iPosition = m_pStreamImp->GetPosition(); + if (m_iPosition > iEnd) { + m_iLength = m_iPosition - m_iStart; + } + return iLen; +} +int32_t CFGAS_Stream::WriteString(const wchar_t* pStr, int32_t iLength) { + ASSERT(pStr && iLength > 0); + if (!m_pStreamImp) { + return -1; + } + if ((m_dwAccess & FX_STREAMACCESS_Write) == 0) { + return -1; + } + int32_t iLen = iLength; + if (m_eStreamType == FX_STREAMTYPE_Stream) { + iLen = std::min((m_iStart + m_iTotalSize - m_iPosition) / 2, iLength); + if (iLen <= 0) { + return 0; + } + } + int32_t iEnd = m_iStart + m_iLength; + if (m_pStreamImp->GetPosition() != m_iPosition) { + m_pStreamImp->Seek(FX_STREAMSEEK_Begin, m_iPosition); + } + iLen = m_pStreamImp->WriteString(pStr, iLen); + m_iPosition = m_pStreamImp->GetPosition(); + if (m_iPosition > iEnd) { + m_iLength = m_iPosition - m_iStart; + } + return iLen; +} +void CFGAS_Stream::Flush() { + if (!m_pStreamImp) { + return; + } + if ((m_dwAccess & FX_STREAMACCESS_Write) == 0) { + return; + } + m_pStreamImp->Flush(); +} +bool CFGAS_Stream::SetLength(int32_t iLength) { + if (!m_pStreamImp) { + return false; + } + if ((m_dwAccess & FX_STREAMACCESS_Write) == 0) { + return false; + } + return m_pStreamImp->SetLength(iLength); +} +int32_t CFGAS_Stream::GetBOM(uint8_t bom[4]) const { + if (!m_pStreamImp) { + return -1; + } + return 0; +} +uint16_t CFGAS_Stream::GetCodePage() const { +#if _FX_ENDIAN_ == _FX_LITTLE_ENDIAN_ + return FX_CODEPAGE_UTF16LE; +#else + return FX_CODEPAGE_UTF16BE; +#endif +} +uint16_t CFGAS_Stream::SetCodePage(uint16_t wCodePage) { +#if _FX_ENDIAN_ == _FX_LITTLE_ENDIAN_ + return FX_CODEPAGE_UTF16LE; +#else + return FX_CODEPAGE_UTF16BE; +#endif +} + +CFX_RetainPtr<IFGAS_Stream> CFGAS_Stream::CreateSharedStream(uint32_t dwAccess, + int32_t iOffset, + int32_t iLength) { + ASSERT(iLength > 0); + if (!m_pStreamImp) + return nullptr; + + if ((m_dwAccess & FX_STREAMACCESS_Text) != 0 && + (dwAccess & FX_STREAMACCESS_Text) == 0) { + return nullptr; + } + if ((m_dwAccess & FX_STREAMACCESS_Write) == 0 && + (dwAccess & FX_STREAMACCESS_Write) != 0) { + return nullptr; + } + int32_t iStart = m_iStart + iOffset; + int32_t iTotal = m_iStart + m_iLength; + if (iStart < m_iStart || iStart >= iTotal) + return nullptr; + + int32_t iEnd = iStart + iLength; + if (iEnd < iStart || iEnd > iTotal) + return nullptr; + + auto pShared = pdfium::MakeRetain<CFGAS_Stream>(); + pShared->m_eStreamType = FX_STREAMTYPE_Stream; + pShared->m_pStreamImp = m_pStreamImp; + pShared->m_dwAccess = dwAccess; + pShared->m_iTotalSize = iLength; + pShared->m_iPosition = iStart; + pShared->m_iStart = iStart; + pShared->m_iLength = (dwAccess & FX_STREAMACCESS_Write) != 0 ? 0 : iLength; + if (dwAccess & FX_STREAMACCESS_Text) + return IFGAS_Stream::CreateTextStream(pShared); + + return pShared; +} + +CFX_RetainPtr<CFGAS_FileRead> CFGAS_FileRead::Create( + const CFX_RetainPtr<IFGAS_Stream>& pStream) { + return pdfium::MakeRetain<CFGAS_FileRead>(pStream); +} + +CFGAS_FileRead::CFGAS_FileRead(const CFX_RetainPtr<IFGAS_Stream>& pStream) + : m_pStream(pStream) { + ASSERT(m_pStream); +} + +CFGAS_FileRead::~CFGAS_FileRead() {} + +FX_FILESIZE CFGAS_FileRead::GetSize() { + return (FX_FILESIZE)m_pStream->GetLength(); +} + +bool CFGAS_FileRead::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) { + m_pStream->Seek(FX_STREAMSEEK_Begin, (int32_t)offset); + int32_t iLen = m_pStream->ReadData((uint8_t*)buffer, (int32_t)size); + return iLen == (int32_t)size; +} + +} // namespace + +// static +CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateStream( + const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead, + uint32_t dwAccess) { + auto pSR = pdfium::MakeRetain<CFGAS_Stream>(); + if (!pSR->LoadFileRead(pFileRead, dwAccess)) + return nullptr; + + if (dwAccess & FX_STREAMACCESS_Text) + return pdfium::MakeRetain<CFGAS_TextStream>(pSR); + + return pSR; +} + +// static +CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateStream( + const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite, + uint32_t dwAccess) { + auto pSR = pdfium::MakeRetain<CFGAS_Stream>(); + if (!pSR->LoadFileWrite(pFileWrite, dwAccess)) + return nullptr; + + if (dwAccess & FX_STREAMACCESS_Text) + return pdfium::MakeRetain<CFGAS_TextStream>(pSR); + + return pSR; +} + +// static +CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateStream(uint8_t* pData, + int32_t length, + uint32_t dwAccess) { + auto pSR = pdfium::MakeRetain<CFGAS_Stream>(); + if (!pSR->LoadBuffer(pData, length, dwAccess)) + return nullptr; + + if (dwAccess & FX_STREAMACCESS_Text) + return pdfium::MakeRetain<CFGAS_TextStream>(pSR); + + return pSR; +} + +// static +CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateTextStream( + const CFX_RetainPtr<IFGAS_Stream>& pBaseStream) { + ASSERT(pBaseStream); + return pdfium::MakeRetain<CFGAS_TextStream>(pBaseStream); +} + +// static +CFX_RetainPtr<IFX_SeekableReadStream> IFGAS_Stream::MakeSeekableReadStream() { + return CFGAS_FileRead::Create(CFX_RetainPtr<IFGAS_Stream>(this)); +} |