directory.cpp

来自「c++编写的FTP服务器和客户端程序」· C++ 代码 · 共 55 行

#include "directory.h"
using namespace std;

Directory::Directory() {
	path = "/";
}

Directory::Directory(const string& dir) {
	path = dir;
}

Directory::operator string() const {
	return path;
}

void Directory::cd(const string& dir) {
	if(dir=="..")
		cdUp();

	else if(dir!=".")
		if(dir[0]=='/')
			path = dir;
		else {
			if(path[path.length()-1]!='/') path += '/';
			path += dir;
		}
}

void Directory::cdUp() {
	if(path=="/") return;

	int slash = path.rfind('/', path.length()-2);
	if(slash>0)
		path.resize(slash);
	else
		path = "/";
}

string Directory::buildFullname(const string& prefix, const string& suffix) {
	string full;

	if(prefix[prefix.length()-1]=='/')
		full = prefix.substr(0, prefix.length()-1);
	else
		full = prefix;

	if(suffix[0]!='/') {
		full += path;
		if(full[full.length()-1]!='/') full += '/';
	}

	full += suffix;
	return full;
}