BaseParser.hpp

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#pragma once
 
#include "AstGlobal.h"
#include "AstUtil/StringView.hpp"
#include <cstdio>
#include <fstream>
#include <vector>
 
AST_NAMESPACE_BEGIN
 
AST_UTIL_CAPI char* fgetlinetrim(char* buffer, int size, FILE* file);
 
 
 
AST_UTIL_CAPI bool aIsHashCommentLine(StringView line);
 
 
 
class AST_UTIL_API BaseParser
{
public:
    BaseParser();
    explicit BaseParser(StringView filepath);
    ~BaseParser();
 
    
public: // 基础操作
    void open(StringView filepath);
 
    bool isOpen() const { return file_ != nullptr; }
 
    void close();
 
    void seek(std::streamoff pos, std::ios::seekdir dir);
 
    std::streamoff tell();
 
    bool eof() const { return feof(file_) != 0; }
 
    size_t read(void* buffer, size_t size, size_t pos) const;
 
    size_t read(void* buffer, size_t size) const;
 
public:
    StringView getLineWithNewline();
 
    StringView getLine();
 
    StringView getLineTrim();
 
    StringView getLineSkipHashComment();
    
public: // 辅助信息
    int getLineNumber();
 
    std::string getFilePath() const;
 
    void setBorrowedFile(FILE* file);
 
    void setOwnedFile(FILE* file);
 
    FILE* getFile() const { return file_; }
 
protected:
    std::vector<char>& getLineBuffer() { return lineBuffer_; }
private:
    FILE*             file_{nullptr};           
    bool              fileBorrowed_{false};     
    std::vector<char> lineBuffer_;               
};
 
 
AST_NAMESPACE_END