diff options
Diffstat (limited to 'xfa/fde/xml/cfx_saxreader.cpp')
| -rw-r--r-- | xfa/fde/xml/cfx_saxreader.cpp | 734 |
1 files changed, 0 insertions, 734 deletions
diff --git a/xfa/fde/xml/cfx_saxreader.cpp b/xfa/fde/xml/cfx_saxreader.cpp deleted file mode 100644 index 50f65731f7..0000000000 --- a/xfa/fde/xml/cfx_saxreader.cpp +++ /dev/null @@ -1,734 +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/fde/xml/cfx_saxreader.h" - -#include <algorithm> -#include <utility> - -#include "third_party/base/ptr_util.h" -#include "third_party/base/stl_util.h" -#include "xfa/fxfa/cxfa_saxreaderhandler.h" - -enum class CFX_SaxMode { - Text = 0, - NodeStart, - DeclOrComment, - DeclNode, - Comment, - CommentContent, - TagName, - TagAttributeName, - TagAttributeEqual, - TagAttributeValue, - TagMaybeClose, - TagClose, - TagEnd, - TargetData, - MAX -}; - -class CFX_SAXCommentContext { - public: - CFX_SAXCommentContext() : m_iHeaderCount(0), m_iTailCount(0) {} - int32_t m_iHeaderCount; - int32_t m_iTailCount; -}; - -namespace { - -const uint32_t kSaxFileBufSize = 32768; - -typedef void (CFX_SAXReader::*FX_SAXReader_LPFParse)(); -static const FX_SAXReader_LPFParse - g_FX_SAXReader_LPFParse[static_cast<int>(CFX_SaxMode::MAX)] = { - &CFX_SAXReader::ParseText, - &CFX_SAXReader::ParseNodeStart, - &CFX_SAXReader::ParseDeclOrComment, - &CFX_SAXReader::ParseDeclNode, - &CFX_SAXReader::ParseComment, - &CFX_SAXReader::ParseCommentContent, - &CFX_SAXReader::ParseTagName, - &CFX_SAXReader::ParseTagAttributeName, - &CFX_SAXReader::ParseTagAttributeEqual, - &CFX_SAXReader::ParseTagAttributeValue, - &CFX_SAXReader::ParseMaybeClose, - &CFX_SAXReader::ParseTagClose, - &CFX_SAXReader::ParseTagEnd, - &CFX_SAXReader::ParseTargetData, -}; - -} // namespace - -CFX_SAXFile::CFX_SAXFile() - : m_dwStart(0), - m_dwEnd(0), - m_dwCur(0), - m_pBuf(nullptr), - m_dwBufSize(0), - m_dwBufIndex(0) {} - -CFX_SAXFile::~CFX_SAXFile() {} - -bool CFX_SAXFile::StartFile(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, - uint32_t dwStart, - uint32_t dwLen) { - ASSERT(!m_pFile && pFile); - uint32_t dwSize = pFile->GetSize(); - if (dwStart >= dwSize) - return false; - - if (dwLen == static_cast<uint32_t>(-1) || dwStart + dwLen > dwSize) - dwLen = dwSize - dwStart; - - if (dwLen == 0) - return false; - - m_dwBufSize = std::min(dwLen, kSaxFileBufSize); - m_pBuf = FX_Alloc(uint8_t, m_dwBufSize); - if (!pFile->ReadBlock(m_pBuf, dwStart, m_dwBufSize)) - return false; - - m_dwStart = dwStart; - m_dwEnd = dwStart + dwLen; - m_dwCur = dwStart; - m_pFile = pFile; - m_dwBufIndex = 0; - return true; -} - -bool CFX_SAXFile::ReadNextBlock() { - ASSERT(m_pFile); - uint32_t dwSize = m_dwEnd - m_dwCur; - if (dwSize == 0) { - return false; - } - m_dwBufSize = std::min(dwSize, kSaxFileBufSize); - if (!m_pFile->ReadBlock(m_pBuf, m_dwCur, m_dwBufSize)) { - return false; - } - m_dwBufIndex = 0; - return true; -} - -void CFX_SAXFile::Reset() { - if (m_pBuf) { - FX_Free(m_pBuf); - m_pBuf = nullptr; - } - m_pFile = nullptr; -} - -CFX_SAXReader::CFX_SAXReader() - : m_File(), - m_pHandler(nullptr), - m_iState(-1), - m_dwItemID(0), - m_iDataSize(256), - m_iNameSize(256), - m_dwParseMode(0), - m_pCommentContext(nullptr) { - m_pszData = FX_Alloc(uint8_t, m_iDataSize); - m_pszName = FX_Alloc(uint8_t, m_iNameSize); -} -CFX_SAXReader::~CFX_SAXReader() { - Reset(); - if (m_pszData) { - FX_Free(m_pszData); - m_pszData = nullptr; - } - if (m_pszName) { - FX_Free(m_pszName); - m_pszName = nullptr; - } -} - -void CFX_SAXReader::Reset() { - m_File.Reset(); - m_Stack = std::stack<std::unique_ptr<CFX_SAXItem>>(); - m_dwItemID = 0; - m_SkipStack = std::stack<char>(); - m_SkipChar = 0; - m_iDataLength = 0; - m_iEntityStart = -1; - m_iNameLength = 0; - m_iDataPos = 0; - m_pCommentContext.reset(); -} - -void CFX_SAXReader::Push() { - std::unique_ptr<CFX_SAXItem> pNew = - pdfium::MakeUnique<CFX_SAXItem>(++m_dwItemID); - if (!m_Stack.empty()) - pNew->m_bSkip = m_Stack.top()->m_bSkip; - m_Stack.push(std::move(pNew)); -} - -void CFX_SAXReader::Pop() { - if (!m_Stack.empty()) - m_Stack.pop(); -} - -CFX_SAXItem* CFX_SAXReader::GetCurrentItem() const { - return m_Stack.empty() ? nullptr : m_Stack.top().get(); -} - -void CFX_SAXReader::AppendData(uint8_t ch) { - ReallocDataBuffer(); - m_pszData[m_iDataPos++] = ch; -} - -void CFX_SAXReader::AppendName(uint8_t ch) { - ReallocNameBuffer(); - m_pszName[m_iDataPos++] = ch; -} - -void CFX_SAXReader::ReallocDataBuffer() { - if (m_iDataPos < m_iDataSize) { - return; - } - if (m_iDataSize <= 1024 * 1024) { - m_iDataSize *= 2; - } else { - m_iDataSize += 1024 * 1024; - } - m_pszData = (uint8_t*)FX_Realloc(uint8_t, m_pszData, m_iDataSize); -} - -void CFX_SAXReader::ReallocNameBuffer() { - if (m_iDataPos < m_iNameSize) { - return; - } - if (m_iNameSize <= 1024 * 1024) { - m_iNameSize *= 2; - } else { - m_iNameSize += 1024 * 1024; - } - m_pszName = (uint8_t*)FX_Realloc(uint8_t, m_pszName, m_iNameSize); -} - -bool CFX_SAXReader::SkipSpace(uint8_t ch) { - return (m_dwParseMode & CFX_SaxParseMode_NotSkipSpace) == 0 && ch < 0x21; -} - -int32_t CFX_SAXReader::StartParse( - const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, - uint32_t dwStart, - uint32_t dwLen, - uint32_t dwParseMode) { - m_iState = -1; - Reset(); - if (!m_File.StartFile(pFile, dwStart, dwLen)) - return -1; - - m_iState = 0; - m_eMode = CFX_SaxMode::Text; - m_ePrevMode = CFX_SaxMode::Text; - m_bCharData = false; - m_dwDataOffset = 0; - m_dwParseMode = dwParseMode; - m_Stack.emplace(new CFX_SAXItem(++m_dwItemID)); - return 0; -} - -int32_t CFX_SAXReader::ContinueParse(IFX_Pause* pPause) { - if (m_iState < 0 || m_iState > 99) { - return m_iState; - } - while (m_File.m_dwCur < m_File.m_dwEnd) { - uint32_t& index = m_File.m_dwBufIndex; - uint32_t size = m_File.m_dwBufSize; - const uint8_t* pBuf = m_File.m_pBuf; - while (index < size) { - m_CurByte = pBuf[index]; - (this->*g_FX_SAXReader_LPFParse[static_cast<int>(m_eMode)])(); - index++; - } - m_File.m_dwCur += index; - m_iState = (m_File.m_dwCur - m_File.m_dwStart) * 100 / - (m_File.m_dwEnd - m_File.m_dwStart); - if (m_File.m_dwCur >= m_File.m_dwEnd) { - break; - } - if (!m_File.ReadNextBlock()) { - m_iState = -2; - break; - } - m_dwDataOffset = 0; - if (pPause && pPause->NeedToPauseNow()) { - break; - } - } - return m_iState; -} -void CFX_SAXReader::ParseChar(uint8_t ch) { - ReallocDataBuffer(); - m_pszData[m_iDataPos] = ch; - if (m_iEntityStart > -1 && ch == ';') { - int32_t iSaveEntityStart = m_iEntityStart; - CFX_ByteString csEntity(m_pszData + m_iEntityStart + 1, - m_iDataPos - m_iEntityStart - 1); - int32_t iLen = csEntity.GetLength(); - if (iLen > 0) { - if (csEntity[0] == '#') { - if ((m_dwParseMode & CFX_SaxParseMode_NotConvert_sharp) == 0) { - ch = 0; - uint8_t w; - if (iLen > 1 && csEntity[1] == 'x') { - for (int32_t i = 2; i < iLen; i++) { - w = csEntity[i]; - if (w >= '0' && w <= '9') { - ch = (ch << 4) + w - '0'; - } else if (w >= 'A' && w <= 'F') { - ch = (ch << 4) + w - 55; - } else if (w >= 'a' && w <= 'f') { - ch = (ch << 4) + w - 87; - } else { - break; - } - } - } else { - for (int32_t i = 1; i < iLen; i++) { - w = csEntity[i]; - if (w < '0' || w > '9') { - break; - } - ch = ch * 10 + w - '0'; - } - } - if (ch != 0) { - m_pszData[m_iEntityStart++] = ch; - } - } - } else { - if (csEntity.Compare("amp") == 0) { - if ((m_dwParseMode & CFX_SaxParseMode_NotConvert_amp) == 0) { - m_pszData[m_iEntityStart++] = '&'; - } - } else if (csEntity.Compare("lt") == 0) { - if ((m_dwParseMode & CFX_SaxParseMode_NotConvert_lt) == 0) { - m_pszData[m_iEntityStart++] = '<'; - } - } else if (csEntity.Compare("gt") == 0) { - if ((m_dwParseMode & CFX_SaxParseMode_NotConvert_gt) == 0) { - m_pszData[m_iEntityStart++] = '>'; - } - } else if (csEntity.Compare("apos") == 0) { - if ((m_dwParseMode & CFX_SaxParseMode_NotConvert_apos) == 0) { - m_pszData[m_iEntityStart++] = '\''; - } - } else if (csEntity.Compare("quot") == 0) { - if ((m_dwParseMode & CFX_SaxParseMode_NotConvert_quot) == 0) { - m_pszData[m_iEntityStart++] = '\"'; - } - } - } - } - if (iSaveEntityStart != m_iEntityStart) { - m_iDataPos = m_iEntityStart; - m_iEntityStart = -1; - } else { - m_iDataPos++; - m_iEntityStart = -1; - } - } else { - if (m_iEntityStart < 0 && ch == '&') { - m_iEntityStart = m_iDataPos; - } - m_iDataPos++; - } -} - -void CFX_SAXReader::ParseText() { - if (m_CurByte == '<') { - if (m_iDataPos > 0) { - m_iDataLength = m_iDataPos; - m_iDataPos = 0; - if (m_pHandler) { - NotifyData(); - } - } - Push(); - m_dwNodePos = m_File.m_dwCur + m_File.m_dwBufIndex; - m_eMode = CFX_SaxMode::NodeStart; - return; - } - if (m_iDataPos < 1 && SkipSpace(m_CurByte)) { - return; - } - ParseChar(m_CurByte); -} - -void CFX_SAXReader::ParseNodeStart() { - if (m_CurByte == '?') { - GetCurrentItem()->m_eNode = CFX_SAXItem::Type::Instruction; - m_eMode = CFX_SaxMode::TagName; - return; - } - if (m_CurByte == '!') { - m_eMode = CFX_SaxMode::DeclOrComment; - return; - } - if (m_CurByte == '/') { - m_eMode = CFX_SaxMode::TagEnd; - return; - } - if (m_CurByte == '>') { - Pop(); - m_eMode = CFX_SaxMode::Text; - return; - } - if (m_CurByte > 0x20) { - m_dwDataOffset = m_File.m_dwBufIndex; - GetCurrentItem()->m_eNode = CFX_SAXItem::Type::Tag; - m_eMode = CFX_SaxMode::TagName; - AppendData(m_CurByte); - } -} - -void CFX_SAXReader::ParseDeclOrComment() { - if (m_CurByte == '-') { - m_eMode = CFX_SaxMode::Comment; - GetCurrentItem()->m_eNode = CFX_SAXItem::Type::Comment; - if (!m_pCommentContext) - m_pCommentContext = pdfium::MakeUnique<CFX_SAXCommentContext>(); - m_pCommentContext->m_iHeaderCount = 1; - m_pCommentContext->m_iTailCount = 0; - return; - } - m_eMode = CFX_SaxMode::DeclNode; - m_dwDataOffset = m_File.m_dwBufIndex; - m_SkipChar = '>'; - m_SkipStack.push('>'); - SkipNode(); -} - -void CFX_SAXReader::ParseComment() { - m_pCommentContext->m_iHeaderCount = 2; - m_dwNodePos = m_File.m_dwCur + m_File.m_dwBufIndex; - m_eMode = CFX_SaxMode::CommentContent; -} - -void CFX_SAXReader::ParseCommentContent() { - if (m_CurByte == '-') { - m_pCommentContext->m_iTailCount++; - } else if (m_CurByte == '>' && m_pCommentContext->m_iTailCount == 2) { - m_iDataLength = m_iDataPos; - m_iDataPos = 0; - if (m_pHandler) { - NotifyTargetData(); - } - Pop(); - m_eMode = CFX_SaxMode::Text; - } else { - while (m_pCommentContext->m_iTailCount > 0) { - AppendData('-'); - m_pCommentContext->m_iTailCount--; - } - AppendData(m_CurByte); - } -} -void CFX_SAXReader::ParseDeclNode() { - SkipNode(); -} -void CFX_SAXReader::ParseTagName() { - if (m_CurByte < 0x21 || m_CurByte == '/' || m_CurByte == '>' || - m_CurByte == '?') { - m_iDataLength = m_iDataPos; - m_iDataPos = 0; - if (m_pHandler) { - NotifyEnter(); - } - if (m_CurByte < 0x21) { - m_eMode = CFX_SaxMode::TagAttributeName; - } else if (m_CurByte == '/' || m_CurByte == '?') { - m_ePrevMode = m_eMode; - m_eMode = CFX_SaxMode::TagMaybeClose; - } else { - if (m_pHandler) { - NotifyBreak(); - } - m_eMode = CFX_SaxMode::Text; - } - } else { - AppendData(m_CurByte); - } -} -void CFX_SAXReader::ParseTagAttributeName() { - if (m_CurByte < 0x21 || m_CurByte == '=') { - if (m_iDataPos < 1 && m_CurByte < 0x21) { - return; - } - m_iNameLength = m_iDataPos; - m_iDataPos = 0; - m_SkipChar = 0; - m_eMode = m_CurByte == '=' ? CFX_SaxMode::TagAttributeValue - : CFX_SaxMode::TagAttributeEqual; - return; - } - if (m_CurByte == '/' || m_CurByte == '>' || m_CurByte == '?') { - if (m_CurByte == '/' || m_CurByte == '?') { - m_ePrevMode = m_eMode; - m_eMode = CFX_SaxMode::TagMaybeClose; - } else { - if (m_pHandler) { - NotifyBreak(); - } - m_eMode = CFX_SaxMode::Text; - } - return; - } - if (m_iDataPos < 1) { - m_dwDataOffset = m_File.m_dwBufIndex; - } - AppendName(m_CurByte); -} - -void CFX_SAXReader::ParseTagAttributeEqual() { - if (m_CurByte == '=') { - m_SkipChar = 0; - m_eMode = CFX_SaxMode::TagAttributeValue; - return; - } - if (GetCurrentItem()->m_eNode == CFX_SAXItem::Type::Instruction) { - m_iDataPos = m_iNameLength; - AppendName(0x20); - m_eMode = CFX_SaxMode::TargetData; - ParseTargetData(); - } -} - -void CFX_SAXReader::ParseTagAttributeValue() { - if (m_SkipChar) { - if (m_SkipChar == m_CurByte) { - { - m_iDataLength = m_iDataPos; - m_iDataPos = 0; - if (m_pHandler) { - NotifyAttribute(); - } - } - m_SkipChar = 0; - m_eMode = CFX_SaxMode::TagAttributeName; - return; - } - ParseChar(m_CurByte); - return; - } - if (m_CurByte < 0x21) { - return; - } - if (m_iDataPos < 1) { - if (m_CurByte == '\'' || m_CurByte == '\"') { - m_SkipChar = m_CurByte; - } - } -} - -void CFX_SAXReader::ParseMaybeClose() { - if (m_CurByte == '>') { - if (GetCurrentItem()->m_eNode == CFX_SAXItem::Type::Instruction) { - m_iNameLength = m_iDataPos; - m_iDataPos = 0; - if (m_pHandler) { - NotifyTargetData(); - } - } - ParseTagClose(); - m_eMode = CFX_SaxMode::Text; - } else if (m_ePrevMode == CFX_SaxMode::TagName) { - AppendData('/'); - m_eMode = CFX_SaxMode::TagName; - m_ePrevMode = CFX_SaxMode::Text; - ParseTagName(); - } else if (m_ePrevMode == CFX_SaxMode::TagAttributeName) { - AppendName('/'); - m_eMode = CFX_SaxMode::TagAttributeName; - m_ePrevMode = CFX_SaxMode::Text; - ParseTagAttributeName(); - } else if (m_ePrevMode == CFX_SaxMode::TargetData) { - AppendName('?'); - m_eMode = CFX_SaxMode::TargetData; - m_ePrevMode = CFX_SaxMode::Text; - ParseTargetData(); - } -} -void CFX_SAXReader::ParseTagClose() { - m_dwNodePos = m_File.m_dwCur + m_File.m_dwBufIndex; - if (m_pHandler) { - NotifyClose(); - } - Pop(); -} -void CFX_SAXReader::ParseTagEnd() { - if (m_CurByte < 0x21) { - return; - } - if (m_CurByte == '>') { - Pop(); - m_dwNodePos = m_File.m_dwCur + m_File.m_dwBufIndex; - m_iDataLength = m_iDataPos; - m_iDataPos = 0; - if (m_pHandler) { - NotifyEnd(); - } - Pop(); - m_eMode = CFX_SaxMode::Text; - } else { - ParseChar(m_CurByte); - } -} -void CFX_SAXReader::ParseTargetData() { - if (m_CurByte == '?') { - m_ePrevMode = m_eMode; - m_eMode = CFX_SaxMode::TagMaybeClose; - } else { - AppendName(m_CurByte); - } -} -void CFX_SAXReader::SkipNode() { - if (m_SkipChar == '\'' || m_SkipChar == '\"') { - if (m_CurByte != m_SkipChar) - return; - - ASSERT(!m_SkipStack.empty()); - m_SkipStack.pop(); - m_SkipChar = !m_SkipStack.empty() ? m_SkipStack.top() : 0; - return; - } - switch (m_CurByte) { - case '<': - m_SkipChar = '>'; - m_SkipStack.push('>'); - break; - case '[': - m_SkipChar = ']'; - m_SkipStack.push(']'); - break; - case '(': - m_SkipChar = ')'; - m_SkipStack.push(')'); - break; - case '\'': - m_SkipChar = '\''; - m_SkipStack.push('\''); - break; - case '\"': - m_SkipChar = '\"'; - m_SkipStack.push('\"'); - break; - default: - if (m_CurByte == m_SkipChar) { - m_SkipStack.pop(); - m_SkipChar = !m_SkipStack.empty() ? m_SkipStack.top() : 0; - if (m_SkipStack.empty() && m_CurByte == '>') { - m_iDataLength = m_iDataPos; - m_iDataPos = 0; - if (m_iDataLength >= 9 && - FXSYS_memcmp(m_pszData, "[CDATA[", 7 * sizeof(uint8_t)) == 0 && - FXSYS_memcmp(m_pszData + m_iDataLength - 2, "]]", - 2 * sizeof(uint8_t)) == 0) { - Pop(); - m_iDataLength -= 9; - m_dwDataOffset += 7; - FXSYS_memmove(m_pszData, m_pszData + 7, - m_iDataLength * sizeof(uint8_t)); - m_bCharData = true; - if (m_pHandler) { - NotifyData(); - } - m_bCharData = false; - } else { - Pop(); - } - m_eMode = CFX_SaxMode::Text; - } - } - break; - } - if (!m_SkipStack.empty()) - ParseChar(m_CurByte); -} - -void CFX_SAXReader::NotifyData() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (!pItem) - return; - - if (pItem->m_eNode == CFX_SAXItem::Type::Tag) - m_pHandler->OnTagData( - pItem->m_pNode, - m_bCharData ? CFX_SAXItem::Type::CharData : CFX_SAXItem::Type::Text, - CFX_ByteStringC(m_pszData, m_iDataLength), - m_File.m_dwCur + m_dwDataOffset); -} - -void CFX_SAXReader::NotifyEnter() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (pItem->m_eNode == CFX_SAXItem::Type::Tag || - pItem->m_eNode == CFX_SAXItem::Type::Instruction) { - pItem->m_pNode = m_pHandler->OnTagEnter( - CFX_ByteStringC(m_pszData, m_iDataLength), pItem->m_eNode, m_dwNodePos); - } -} - -void CFX_SAXReader::NotifyAttribute() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (pItem->m_eNode == CFX_SAXItem::Type::Tag || - pItem->m_eNode == CFX_SAXItem::Type::Instruction) { - m_pHandler->OnTagAttribute(pItem->m_pNode, - CFX_ByteStringC(m_pszName, m_iNameLength), - CFX_ByteStringC(m_pszData, m_iDataLength)); - } -} - -void CFX_SAXReader::NotifyBreak() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (pItem->m_eNode == CFX_SAXItem::Type::Tag) - m_pHandler->OnTagBreak(pItem->m_pNode); -} - -void CFX_SAXReader::NotifyClose() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (pItem->m_eNode == CFX_SAXItem::Type::Tag || - pItem->m_eNode == CFX_SAXItem::Type::Instruction) { - m_pHandler->OnTagClose(pItem->m_pNode, m_dwNodePos); - } -} - -void CFX_SAXReader::NotifyEnd() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (!pItem || pItem->m_eNode != CFX_SAXItem::Type::Tag) - return; - - m_pHandler->OnTagEnd(pItem->m_pNode, - CFX_ByteStringC(m_pszData, m_iDataLength), m_dwNodePos); -} - -void CFX_SAXReader::NotifyTargetData() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (pItem->m_eNode == CFX_SAXItem::Type::Instruction) { - m_pHandler->OnTargetData(pItem->m_pNode, pItem->m_eNode, - CFX_ByteStringC(m_pszName, m_iNameLength), - m_dwNodePos); - } else if (pItem->m_eNode == CFX_SAXItem::Type::Comment) { - m_pHandler->OnTargetData(pItem->m_pNode, pItem->m_eNode, - CFX_ByteStringC(m_pszData, m_iDataLength), - m_dwNodePos); - } -} - -void CFX_SAXReader::SkipCurrentNode() { - CFX_SAXItem* pItem = GetCurrentItem(); - if (!pItem) - return; - - pItem->m_bSkip = true; -} - -void CFX_SAXReader::SetHandler(CXFA_SAXReaderHandler* pHandler) { - m_pHandler = pHandler; -} |