currentpath.cpp

模拟Linux文件系统 在任一OS下

#include"disk.h"

currentpath::currentpath(char*temp){
	cp=new char[currentpath_maxlength];
	strcpy(cp,temp);
}
		
currentpath::currentpath(){
	cp=new char[currentpath_maxlength];
}

void currentpath::format(){
	int sit=0;
	level=1;
	cpformat[level][0]=0;
	for(int i=0;cp[i]!='\0';i++){
		if(cp[i]!='/'){
			cpformat[level][1]=i;
		}
		else{
			level++;
			cpformat[level][0]=i+1;
		}
	}
	char filename[filenamelength];
	getname(filename,1);
	if(strcmp(filename,"root")!=0){
		cout<<"currentpath wrong"<<endl;
	    exit(0);
	}
}

void currentpath::getname(char*filename,int l){
	if(l<=0||l>level){
		cout<<"level is wrong"<<endl;
		exit(0);
	}
	int j=0;
	for(int i=cpformat[l][0];i<=cpformat[l][1];i++){
		filename[j]=cp[i];
		j++;
	}
	filename[j]='\0';
}
void currentpath::add(char*newfilename){
	strcat(cp,"/");
	strcat(cp,newfilename);
	cpformat[level+1][0]=cpformat[level][1]+2;
	for(int i=0;newfilename[i]!='\0';i++);
	i--;
	cpformat[level+1][1]=cpformat[level+1][0]+i;
	level++;
}
	
void currentpath::open(char*temp){
	delete []cp;
	cp=new char[currentpath_maxlength];
	strcpy(cp,temp);
}
void currentpath::sub(){
	cp[cpformat[level][0]-1]='\0';
	level--;
}