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// Copyright 2017 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
#ifndef CORE_FXCRT_XML_CFX_XMLSYNTAXPARSER_H_
#define CORE_FXCRT_XML_CFX_XMLSYNTAXPARSER_H_
#include <stack>
#include <vector>
#include "core/fxcrt/cfx_blockbuffer.h"
#include "core/fxcrt/cfx_retain_ptr.h"
#include "core/fxcrt/cfx_seekablestreamproxy.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/xml/cfx_xmlnode.h"
enum class FX_XmlSyntaxResult {
None,
InstructionOpen,
InstructionClose,
ElementOpen,
ElementBreak,
ElementClose,
TargetName,
TagName,
AttriName,
AttriValue,
Text,
CData,
TargetData,
Error,
EndOfString
};
class CFX_XMLSyntaxParser {
public:
static bool IsXMLNameChar(wchar_t ch, bool bFirstChar);
explicit CFX_XMLSyntaxParser(
const CFX_RetainPtr<CFX_SeekableStreamProxy>& pStream);
~CFX_XMLSyntaxParser();
FX_XmlSyntaxResult DoSyntaxParse();
int32_t GetStatus() const;
FX_FILESIZE GetCurrentPos() const { return m_ParsedChars + m_Start; }
FX_FILESIZE GetCurrentBinaryPos() const;
int32_t GetCurrentNodeNumber() const { return m_iCurrentNodeNum; }
int32_t GetLastNodeNumber() const { return m_iLastNodeNum; }
CFX_WideString GetTargetName() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
CFX_WideString GetTagName() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
CFX_WideString GetAttributeName() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
CFX_WideString GetAttributeValue() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
CFX_WideString GetTextData() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
CFX_WideString GetTargetData() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
protected:
enum class FDE_XmlSyntaxState {
Text,
Node,
Target,
Tag,
AttriName,
AttriEqualSign,
AttriQuotation,
AttriValue,
Entity,
EntityDecimal,
EntityHex,
CloseInstruction,
BreakElement,
CloseElement,
SkipDeclNode,
DeclCharData,
SkipComment,
SkipCommentOrDecl,
SkipCData,
TargetData
};
void ParseTextChar(wchar_t ch);
CFX_RetainPtr<CFX_SeekableStreamProxy> m_pStream;
FX_STRSIZE m_iXMLPlaneSize;
int32_t m_iCurrentPos;
int32_t m_iCurrentNodeNum;
int32_t m_iLastNodeNum;
int32_t m_iParsedBytes;
FX_FILESIZE m_ParsedChars;
std::vector<wchar_t> m_Buffer;
int32_t m_iBufferChars;
bool m_bEOS;
FX_FILESIZE m_Start; // Start position in m_Buffer
FX_FILESIZE m_End; // End position in m_Buffer
FX_XMLNODE m_CurNode;
std::stack<FX_XMLNODE> m_XMLNodeStack;
CFX_BlockBuffer m_BlockBuffer;
int32_t m_iAllocStep;
wchar_t* m_pCurrentBlock; // Pointer into CFX_BlockBuffer
int32_t m_iIndexInBlock;
int32_t m_iTextDataLength;
FX_XmlSyntaxResult m_syntaxParserResult;
FDE_XmlSyntaxState m_syntaxParserState;
wchar_t m_wQuotationMark;
int32_t m_iEntityStart;
std::stack<wchar_t> m_SkipStack;
wchar_t m_SkipChar;
};
#endif // CORE_FXCRT_XML_CFX_XMLSYNTAXPARSER_H_
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