diff options
Diffstat (limited to 'xfa/fgas/crt/cfgas_stream.cpp')
| -rw-r--r-- | xfa/fgas/crt/cfgas_stream.cpp | 304 |
1 files changed, 0 insertions, 304 deletions
diff --git a/xfa/fgas/crt/cfgas_stream.cpp b/xfa/fgas/crt/cfgas_stream.cpp deleted file mode 100644 index 809c19bdae..0000000000 --- a/xfa/fgas/crt/cfgas_stream.cpp +++ /dev/null @@ -1,304 +0,0 @@ -// 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/cfgas_stream.h" - -#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN32_MOBILE_ || \ - _FX_OS_ == _FX_WIN64_ -#include <io.h> -#endif - -#include <algorithm> -#include <limits> -#include <memory> -#include <utility> -#include <vector> - -#include "core/fxcrt/fx_ext.h" -#include "third_party/base/ptr_util.h" -#include "third_party/base/stl_util.h" -#include "xfa/fgas/crt/fgas_codepage.h" - -namespace { - -// Returns {src bytes consumed, dst bytes produced}. -std::pair<FX_STRSIZE, FX_STRSIZE> UTF8Decode(const char* pSrc, - FX_STRSIZE srcLen, - wchar_t* pDst, - FX_STRSIZE dstLen) { - ASSERT(pDst && dstLen > 0); - - if (srcLen < 1) - return {0, 0}; - - uint32_t dwCode = 0; - int32_t iPending = 0; - FX_STRSIZE iSrcNum = 0; - FX_STRSIZE iDstNum = 0; - FX_STRSIZE iIndex = 0; - int32_t k = 1; - while (iIndex < srcLen) { - uint8_t byte = static_cast<uint8_t>(*(pSrc + iIndex)); - if (byte < 0x80) { - iPending = 0; - k = 1; - iDstNum++; - iSrcNum += k; - *pDst++ = byte; - if (iDstNum >= dstLen) - break; - } else if (byte < 0xc0) { - if (iPending < 1) - break; - - iPending--; - dwCode |= (byte & 0x3f) << (iPending * 6); - if (iPending == 0) { - iDstNum++; - iSrcNum += k; - *pDst++ = dwCode; - if (iDstNum >= dstLen) - break; - } - } else if (byte < 0xe0) { - iPending = 1; - k = 2; - dwCode = (byte & 0x1f) << 6; - } else if (byte < 0xf0) { - iPending = 2; - k = 3; - dwCode = (byte & 0x0f) << 12; - } else if (byte < 0xf8) { - iPending = 3; - k = 4; - dwCode = (byte & 0x07) << 18; - } else if (byte < 0xfc) { - iPending = 4; - k = 5; - dwCode = (byte & 0x03) << 24; - } else if (byte < 0xfe) { - iPending = 5; - k = 6; - dwCode = (byte & 0x01) << 30; - } else { - break; - } - iIndex++; - } - return {iSrcNum, iDstNum}; -} - -void UTF16ToWChar(void* pBuffer, FX_STRSIZE iLength) { - ASSERT(pBuffer && iLength > 0); - - if (sizeof(wchar_t) == 2) - return; - - uint16_t* pSrc = static_cast<uint16_t*>(pBuffer); - wchar_t* pDst = static_cast<wchar_t*>(pBuffer); - while (--iLength >= 0) - pDst[iLength] = static_cast<wchar_t>(pSrc[iLength]); -} - -void SwapByteOrder(wchar_t* pStr, FX_STRSIZE iLength) { - ASSERT(pStr); - - if (iLength < 0) - iLength = FXSYS_wcslen(pStr); - - uint16_t wch; - if (sizeof(wchar_t) > 2) { - while (iLength-- > 0) { - wch = static_cast<uint16_t>(*pStr); - wch = (wch >> 8) | (wch << 8); - wch &= 0x00FF; - *pStr = wch; - ++pStr; - } - return; - } - - while (iLength-- > 0) { - wch = static_cast<uint16_t>(*pStr); - wch = (wch >> 8) | (wch << 8); - *pStr = wch; - ++pStr; - } -} - -} // namespace - -#if _FX_ENDIAN_ == _FX_LITTLE_ENDIAN_ -#define BOM_MASK 0x00FFFFFF -#define BOM_UTF8 0x00BFBBEF -#define BOM_UTF16_MASK 0x0000FFFF -#define BOM_UTF16_BE 0x0000FFFE -#define BOM_UTF16_LE 0x0000FEFF -#else -#define BOM_MASK 0xFFFFFF00 -#define BOM_UTF8 0xEFBBBF00 -#define BOM_UTF16_MASK 0xFFFF0000 -#define BOM_UTF16_BE 0xFEFF0000 -#define BOM_UTF16_LE 0xFFFE0000 -#endif // _FX_ENDIAN_ == _FX_LITTLE_ENDIAN_ - -CFGAS_Stream::CFGAS_Stream(const CFX_RetainPtr<IFX_SeekableStream>& stream, - bool isWriteStream) - : m_wCodePage(FX_CODEPAGE_DefANSI), - m_wBOMLength(0), - m_IsWriteStream(isWriteStream), - m_iPosition(0), - m_pStream(stream) { - ASSERT(m_pStream); - - if (isWriteStream) { - m_iPosition = m_pStream->GetSize(); - return; - } - - FX_FILESIZE iPosition = GetPosition(); - Seek(CFGAS_Stream::Pos::Begin, 0); - - uint32_t bom; - ReadData(reinterpret_cast<uint8_t*>(&bom), 3); - - bom &= BOM_MASK; - if (bom == BOM_UTF8) { - m_wBOMLength = 3; - m_wCodePage = FX_CODEPAGE_UTF8; - } else { - bom &= BOM_UTF16_MASK; - if (bom == BOM_UTF16_BE) { - m_wBOMLength = 2; - m_wCodePage = FX_CODEPAGE_UTF16BE; - } else if (bom == BOM_UTF16_LE) { - m_wBOMLength = 2; - m_wCodePage = FX_CODEPAGE_UTF16LE; - } else { - m_wBOMLength = 0; - m_wCodePage = FXSYS_GetACP(); - } - } - - Seek(CFGAS_Stream::Pos::Begin, - std::max(static_cast<FX_FILESIZE>(m_wBOMLength), iPosition)); -} - -CFGAS_Stream::CFGAS_Stream(uint8_t* data, FX_STRSIZE size) - : CFGAS_Stream(IFX_MemoryStream::Create(data, size), false) {} - -CFGAS_Stream::~CFGAS_Stream() {} - -void CFGAS_Stream::Seek(CFGAS_Stream::Pos eSeek, FX_FILESIZE iOffset) { - switch (eSeek) { - case CFGAS_Stream::Pos::Begin: - m_iPosition = iOffset; - break; - case CFGAS_Stream::Pos::Current: - m_iPosition += iOffset; - break; - } - m_iPosition = - pdfium::clamp(m_iPosition, static_cast<FX_FILESIZE>(0), GetLength()); -} - -void CFGAS_Stream::SetCodePage(uint16_t wCodePage) { - if (m_wBOMLength > 0) - return; - m_wCodePage = wCodePage; -} - -FX_STRSIZE CFGAS_Stream::ReadData(uint8_t* pBuffer, FX_STRSIZE iBufferSize) { - ASSERT(pBuffer && iBufferSize > 0); - - if (m_IsWriteStream) - return -1; - - iBufferSize = std::min( - iBufferSize, static_cast<FX_STRSIZE>(m_pStream->GetSize() - m_iPosition)); - if (iBufferSize <= 0) - return 0; - - if (m_pStream->ReadBlock(pBuffer, m_iPosition, iBufferSize)) { - pdfium::base::CheckedNumeric<FX_FILESIZE> new_pos = m_iPosition; - new_pos += iBufferSize; - if (!new_pos.IsValid()) - return 0; - - m_iPosition = new_pos.ValueOrDie(); - return iBufferSize; - } - return 0; -} - -FX_STRSIZE CFGAS_Stream::ReadString(wchar_t* pStr, - FX_STRSIZE iMaxLength, - bool* bEOS) { - ASSERT(pStr && iMaxLength > 0); - - if (m_IsWriteStream) - return -1; - - if (m_wCodePage == FX_CODEPAGE_UTF16LE || - m_wCodePage == FX_CODEPAGE_UTF16BE) { - FX_FILESIZE iBytes = iMaxLength * 2; - FX_STRSIZE iLen = ReadData(reinterpret_cast<uint8_t*>(pStr), iBytes); - iMaxLength = iLen / 2; - if (sizeof(wchar_t) > 2) - UTF16ToWChar(pStr, iMaxLength); - -#if _FX_ENDIAN_ == _FX_BIG_ENDIAN_ - if (m_wCodePage == FX_CODEPAGE_UTF16LE) - SwapByteOrder(pStr, iMaxLength); -#else - if (m_wCodePage == FX_CODEPAGE_UTF16BE) - SwapByteOrder(pStr, iMaxLength); -#endif - - } else { - FX_FILESIZE pos = GetPosition(); - FX_STRSIZE iBytes = - std::min(iMaxLength, static_cast<FX_STRSIZE>(GetLength() - pos)); - - if (iBytes > 0) { - std::vector<uint8_t> buf(iBytes); - - FX_STRSIZE iLen = ReadData(buf.data(), iBytes); - if (m_wCodePage != FX_CODEPAGE_UTF8) - return -1; - - FX_STRSIZE iSrc = 0; - std::tie(iSrc, iMaxLength) = UTF8Decode( - reinterpret_cast<const char*>(buf.data()), iLen, pStr, iMaxLength); - Seek(CFGAS_Stream::Pos::Current, iSrc - iLen); - } else { - iMaxLength = 0; - } - } - - *bEOS = IsEOF(); - return iMaxLength; -} - -void CFGAS_Stream::WriteString(const CFX_WideStringC& str) { - if (!m_IsWriteStream || str.GetLength() == 0 || - m_wCodePage != FX_CODEPAGE_UTF8) { - return; - } - if (!m_pStream->WriteBlock(str.c_str(), m_iPosition, - str.GetLength() * sizeof(wchar_t))) { - return; - } - - pdfium::base::CheckedNumeric<FX_STRSIZE> new_pos = m_iPosition; - new_pos += str.GetLength() * sizeof(wchar_t); - if (!new_pos.IsValid()) { - m_iPosition = std::numeric_limits<FX_STRSIZE>::max(); - return; - } - - m_iPosition = new_pos.ValueOrDie(); -} |