XMLParser.hpp

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#pragma once
 
#include "AstGlobal.h"
#include "AstUtil/BaseParser.hpp"
#include "AstUtil/BKVItemView.hpp"
#include "AstUtil/XMLNode.hpp"
#include "AstUtil/XMLSax.hpp"
#include <string>
#include <vector>
#include <memory>
#include <deque>
 
 
AST_NAMESPACE_BEGIN
 
 
class XMLNode;
class XMLSax;
 
 
class AST_UTIL_API XMLParser : public BaseParser 
{
public:
    enum EToken
    {
        eError = -1,               
        eStartDocument,            
        eEndDocument,              
        eStartElement,             
        eEndElement,               
        eCharacters,               
        eComment,                  
        eDocTypeDecl,              
        eProcessingInstruction,    
        // eUnknown,                  ///< 未知元素
    };
 
    XMLParser();
    explicit XMLParser(StringView filepath);
    ~XMLParser();
 
    errc_t parse(XMLSax& sax);
    errc_t parse(XMLNode& node);
    EToken getNext();
    StringView getName() const{return nameOrText_;}
    StringView getText() const{return nameOrText_;}
    StringView getComment() const{return nameOrText_;}
    const XMLSax::AttributeList& getAttributes() const{return attributes_;}
protected:
    void setName(StringView name){nameOrText_ = name;}
    void setText(StringView text){nameOrText_ = text;}
    void setComment(StringView comment){nameOrText_ = comment;}
private:
    errc_t appendBuffer(size_t size);
 
    errc_t appendBuffer();
 
 
    int peek();
    
    int get();
 
    StringView ensure(size_t n);
 
    void seekFileToCurrent();
 
private: // XML 片段解析函数
 
    EToken parseStartElement();
    EToken parseEndElement();
    EToken parseText();
    EToken parseComment();
    EToken parseCDATA();
    EToken parsePI();
    EToken parseDocTypeDecl();
    
    StringView parseUntil(char stopChar);
    StringView parseUntil(StringView stopSeq);
    void advance(int n);
    void skipWhitespace();
private:
    size_t pos_{0};                        
    std::vector<char> buffer_;             
    XMLSax::AttributeList attributes_;     
    StringView nameOrText_;                
    bool selfClosingTag_{false};           
    std::string unescapedText_;            
};
 
 
AST_NAMESPACE_END