db.h

简单的基于文件的数据库小程序

#ifndef _DB_H_
#define _DB_H_

#include <vector>
#include "Tool.h"

using namespace std; 

class db
{
public:
    std::vector<const char*> tables;
    QString dbName;
    db(const char* name) 
    {
    dbName = name;
    tables = std::vector<const char*>(0);
    vector<char*> buffer;
    if(hasFile(name)) {
        int fd=openFile(name);
        char * temp=getNextLine(fd);
   
        while(temp!=NULL){
            if(strcmp(temp,"")!=0){
                buffer.push_back(temp);
                                 }            
            temp=getNextLine(fd);           
                     }
      closeFile(fd);
	  for(uint i=0;i<buffer.size();i++){
		  tables.push_back(buffer[i]);
	  }
           }
    else return;
    }
    void add(const char* name) 
    {
    tables.push_back(name);
    addLineToFile(dbName,name);
	checkFileExist(name);
	//addLineToFile(name,"1");
    }
    void del(const char* name)
    {
    
	deleteOneLine(dbName,name);
	
       deleteFile(name);
	
    
       vector<const char *>::iterator it=tables.begin();
    for(;it!=tables.end()+1;++it){
        if(strcmp(*it,name)==0){
            it=tables.erase(it);
	    tables.resize(0);
	    break;
        }
        }
    }
    virtual ~db()
    {
    
    }
};

#endif