diff options
Diffstat (limited to 'xfa/fgas/xml/fgas_sax.cpp')
| -rw-r--r-- | xfa/fgas/xml/fgas_sax.cpp | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/xfa/fgas/xml/fgas_sax.cpp b/xfa/fgas/xml/fgas_sax.cpp new file mode 100644 index 0000000000..b97aeb0a7c --- /dev/null +++ b/xfa/fgas/xml/fgas_sax.cpp @@ -0,0 +1,688 @@ +// 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/xml/fgas_sax.h" + +#include <algorithm> + +#include "xfa/fxfa/include/xfa_checksum.h" + +namespace { + +const uint32_t kSaxFileBufSize = 32768; + +} // namespace + +CFX_SAXFile::CFX_SAXFile() + : m_pFile(NULL), + m_dwStart(0), + m_dwEnd(0), + m_dwCur(0), + m_pBuf(NULL), + m_dwBufSize(0), + m_dwBufIndex(0) {} +FX_BOOL CFX_SAXFile::StartFile(IFX_FileRead* pFile, + uint32_t dwStart, + uint32_t dwLen) { + ASSERT(m_pFile == NULL && pFile != NULL); + uint32_t dwSize = pFile->GetSize(); + if (dwStart >= dwSize) { + return FALSE; + } + if (dwLen == -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; +} +FX_BOOL CFX_SAXFile::ReadNextBlock() { + ASSERT(m_pFile != NULL); + 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 = NULL; + } + m_pFile = NULL; +} +CFX_SAXReader::CFX_SAXReader() + : m_File(), + m_pHandler(nullptr), + m_iState(-1), + m_pRoot(nullptr), + m_pCurItem(nullptr), + 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 = NULL; + } + if (m_pszName) { + FX_Free(m_pszName); + m_pszName = NULL; + } +} +void CFX_SAXReader::Reset() { + m_File.Reset(); + CFX_SAXItem* pItem = m_pRoot; + while (pItem) { + CFX_SAXItem* pNext = pItem->m_pNext; + delete pItem; + pItem = pNext; + } + m_pRoot = NULL; + m_pCurItem = NULL; + m_dwItemID = 0; + m_SkipStack.RemoveAll(); + m_SkipChar = 0; + m_iDataLength = 0; + m_iEntityStart = -1; + m_iNameLength = 0; + m_iDataPos = 0; + if (m_pCommentContext) { + delete m_pCommentContext; + m_pCommentContext = NULL; + } +} +inline void CFX_SAXReader::Push() { + CFX_SAXItem* pNew = new CFX_SAXItem; + pNew->m_dwID = ++m_dwItemID; + pNew->m_bSkip = m_pCurItem->m_bSkip; + pNew->m_pPrev = m_pCurItem; + m_pCurItem->m_pNext = pNew; + m_pCurItem = pNew; +} +inline void CFX_SAXReader::Pop() { + if (!m_pCurItem) { + return; + } + CFX_SAXItem* pPrev = m_pCurItem->m_pPrev; + pPrev->m_pNext = NULL; + delete m_pCurItem; + m_pCurItem = pPrev; +} +inline void CFX_SAXReader::AppendData(uint8_t ch) { + ReallocDataBuffer(); + m_pszData[m_iDataPos++] = ch; +} +inline 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); +} +inline FX_BOOL CFX_SAXReader::SkipSpace(uint8_t ch) { + return (m_dwParseMode & FX_SAXPARSEMODE_NotSkipSpace) == 0 && ch < 0x21; +} +int32_t CFX_SAXReader::StartParse(IFX_FileRead* 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 = FX_SAXMODE_Text; + m_ePrevMode = FX_SAXMODE_Text; + m_bCharData = FALSE; + m_dwDataOffset = 0; + m_pRoot = m_pCurItem = new CFX_SAXItem; + m_pCurItem->m_dwID = ++m_dwItemID; + m_dwParseMode = dwParseMode; + return 0; +} +typedef void (CFX_SAXReader::*FX_SAXReader_LPFParse)(); +static const FX_SAXReader_LPFParse g_FX_SAXReader_LPFParse[FX_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, +}; +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[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 & FX_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 & FX_SAXPARSEMODE_NotConvert_amp) == 0) { + m_pszData[m_iEntityStart++] = '&'; + } + } else if (csEntity.Compare("lt") == 0) { + if ((m_dwParseMode & FX_SAXPARSEMODE_NotConvert_lt) == 0) { + m_pszData[m_iEntityStart++] = '<'; + } + } else if (csEntity.Compare("gt") == 0) { + if ((m_dwParseMode & FX_SAXPARSEMODE_NotConvert_gt) == 0) { + m_pszData[m_iEntityStart++] = '>'; + } + } else if (csEntity.Compare("apos") == 0) { + if ((m_dwParseMode & FX_SAXPARSEMODE_NotConvert_apos) == 0) { + m_pszData[m_iEntityStart++] = '\''; + } + } else if (csEntity.Compare("quot") == 0) { + if ((m_dwParseMode & FX_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 = FX_SAXMODE_NodeStart; + return; + } + if (m_iDataPos < 1 && SkipSpace(m_CurByte)) { + return; + } + ParseChar(m_CurByte); +} +void CFX_SAXReader::ParseNodeStart() { + if (m_CurByte == '?') { + m_pCurItem->m_eNode = FX_SAXNODE_Instruction; + m_eMode = FX_SAXMODE_TagName; + return; + } + if (m_CurByte == '!') { + m_eMode = FX_SAXMODE_DeclOrComment; + return; + } + if (m_CurByte == '/') { + m_eMode = FX_SAXMODE_TagEnd; + return; + } + if (m_CurByte == '>') { + Pop(); + m_eMode = FX_SAXMODE_Text; + return; + } + if (m_CurByte > 0x20) { + m_dwDataOffset = m_File.m_dwBufIndex; + m_pCurItem->m_eNode = FX_SAXNODE_Tag; + m_eMode = FX_SAXMODE_TagName; + AppendData(m_CurByte); + } +} +void CFX_SAXReader::ParseDeclOrComment() { + if (m_CurByte == '-') { + m_eMode = FX_SAXMODE_Comment; + m_pCurItem->m_eNode = FX_SAXNODE_Comment; + if (m_pCommentContext == NULL) { + m_pCommentContext = new CFX_SAXCommentContext; + } + m_pCommentContext->m_iHeaderCount = 1; + m_pCommentContext->m_iTailCount = 0; + } else { + m_eMode = FX_SAXMODE_DeclNode; + m_dwDataOffset = m_File.m_dwBufIndex; + m_SkipChar = '>'; + m_SkipStack.Add('>'); + SkipNode(); + } +} +void CFX_SAXReader::ParseComment() { + m_pCommentContext->m_iHeaderCount = 2; + m_dwNodePos = m_File.m_dwCur + m_File.m_dwBufIndex; + m_eMode = FX_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 = FX_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 = FX_SAXMODE_TagAttributeName; + } else if (m_CurByte == '/' || m_CurByte == '?') { + m_ePrevMode = m_eMode; + m_eMode = FX_SAXMODE_TagMaybeClose; + } else { + if (m_pHandler) { + NotifyBreak(); + } + m_eMode = FX_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 == '=' ? FX_SAXMODE_TagAttributeValue + : FX_SAXMODE_TagAttributeEqual; + return; + } + if (m_CurByte == '/' || m_CurByte == '>' || m_CurByte == '?') { + if (m_CurByte == '/' || m_CurByte == '?') { + m_ePrevMode = m_eMode; + m_eMode = FX_SAXMODE_TagMaybeClose; + } else { + if (m_pHandler) { + NotifyBreak(); + } + m_eMode = FX_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 = FX_SAXMODE_TagAttributeValue; + return; + } else if (m_pCurItem->m_eNode == FX_SAXNODE_Instruction) { + m_iDataPos = m_iNameLength; + AppendName(0x20); + m_eMode = FX_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 = FX_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 (m_pCurItem->m_eNode == FX_SAXNODE_Instruction) { + m_iNameLength = m_iDataPos; + m_iDataPos = 0; + if (m_pHandler) { + NotifyTargetData(); + } + } + ParseTagClose(); + m_eMode = FX_SAXMODE_Text; + } else if (m_ePrevMode == FX_SAXMODE_TagName) { + AppendData('/'); + m_eMode = FX_SAXMODE_TagName; + m_ePrevMode = FX_SAXMODE_Text; + ParseTagName(); + } else if (m_ePrevMode == FX_SAXMODE_TagAttributeName) { + AppendName('/'); + m_eMode = FX_SAXMODE_TagAttributeName; + m_ePrevMode = FX_SAXMODE_Text; + ParseTagAttributeName(); + } else if (m_ePrevMode == FX_SAXMODE_TargetData) { + AppendName('?'); + m_eMode = FX_SAXMODE_TargetData; + m_ePrevMode = FX_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 = FX_SAXMODE_Text; + } else { + ParseChar(m_CurByte); + } +} +void CFX_SAXReader::ParseTargetData() { + if (m_CurByte == '?') { + m_ePrevMode = m_eMode; + m_eMode = FX_SAXMODE_TagMaybeClose; + } else { + AppendName(m_CurByte); + } +} +void CFX_SAXReader::SkipNode() { + int32_t iLen = m_SkipStack.GetSize(); + if (m_SkipChar == '\'' || m_SkipChar == '\"') { + if (m_CurByte != m_SkipChar) { + return; + } + iLen--; + ASSERT(iLen > -1); + m_SkipStack.RemoveAt(iLen, 1); + m_SkipChar = iLen ? m_SkipStack[iLen - 1] : 0; + return; + } + switch (m_CurByte) { + case '<': + m_SkipChar = '>'; + m_SkipStack.Add('>'); + break; + case '[': + m_SkipChar = ']'; + m_SkipStack.Add(']'); + break; + case '(': + m_SkipChar = ')'; + m_SkipStack.Add(')'); + break; + case '\'': + m_SkipChar = '\''; + m_SkipStack.Add('\''); + break; + case '\"': + m_SkipChar = '\"'; + m_SkipStack.Add('\"'); + break; + default: + if (m_CurByte == m_SkipChar) { + iLen--; + m_SkipStack.RemoveAt(iLen, 1); + m_SkipChar = iLen ? m_SkipStack[iLen - 1] : 0; + if (iLen == 0 && 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 = FX_SAXMODE_Text; + } + } + break; + } + if (iLen > 0) { + ParseChar(m_CurByte); + } +} + +void CFX_SAXReader::NotifyData() { + if (m_pCurItem->m_eNode == FX_SAXNODE_Tag) + m_pHandler->OnTagData(m_pCurItem->m_pNode, + m_bCharData ? FX_SAXNODE_CharData : FX_SAXNODE_Text, + CFX_ByteStringC(m_pszData, m_iDataLength), + m_File.m_dwCur + m_dwDataOffset); +} + +void CFX_SAXReader::NotifyEnter() { + if (m_pCurItem->m_eNode == FX_SAXNODE_Tag || + m_pCurItem->m_eNode == FX_SAXNODE_Instruction) { + m_pCurItem->m_pNode = + m_pHandler->OnTagEnter(CFX_ByteStringC(m_pszData, m_iDataLength), + m_pCurItem->m_eNode, m_dwNodePos); + } +} + +void CFX_SAXReader::NotifyAttribute() { + if (m_pCurItem->m_eNode == FX_SAXNODE_Tag || + m_pCurItem->m_eNode == FX_SAXNODE_Instruction) { + m_pHandler->OnTagAttribute(m_pCurItem->m_pNode, + CFX_ByteStringC(m_pszName, m_iNameLength), + CFX_ByteStringC(m_pszData, m_iDataLength)); + } +} + +void CFX_SAXReader::NotifyBreak() { + if (m_pCurItem->m_eNode == FX_SAXNODE_Tag) + m_pHandler->OnTagBreak(m_pCurItem->m_pNode); +} + +void CFX_SAXReader::NotifyClose() { + if (m_pCurItem->m_eNode == FX_SAXNODE_Tag || + m_pCurItem->m_eNode == FX_SAXNODE_Instruction) { + m_pHandler->OnTagClose(m_pCurItem->m_pNode, m_dwNodePos); + } +} + +void CFX_SAXReader::NotifyEnd() { + if (m_pCurItem->m_eNode != FX_SAXNODE_Tag) + return; + + m_pHandler->OnTagEnd(m_pCurItem->m_pNode, + CFX_ByteStringC(m_pszData, m_iDataLength), m_dwNodePos); +} + +void CFX_SAXReader::NotifyTargetData() { + if (m_pCurItem->m_eNode == FX_SAXNODE_Instruction) { + m_pHandler->OnTargetData(m_pCurItem->m_pNode, m_pCurItem->m_eNode, + CFX_ByteStringC(m_pszName, m_iNameLength), + m_dwNodePos); + } else if (m_pCurItem->m_eNode == FX_SAXNODE_Comment) { + m_pHandler->OnTargetData(m_pCurItem->m_pNode, m_pCurItem->m_eNode, + CFX_ByteStringC(m_pszData, m_iDataLength), + m_dwNodePos); + } +} + +void CFX_SAXReader::SkipCurrentNode() { + if (!m_pCurItem) + return; + + m_pCurItem->m_bSkip = TRUE; +} + +void CFX_SAXReader::SetHandler(CXFA_SAXReaderHandler* pHandler) { + m_pHandler = pHandler; +} |