dir_utils.cpp

Particle filtering implementation and application to people tracking.

#include "dir_utils.h"
#include <iostream>

std::string dirname(const std::string& path)
{
	return path.substr(0,path.length() - std::string(basename(path.c_str())).length()-1);
}


DirHandle::DirHandle():
	pdir(NULL)
{
	path = "";}

DirHandle::DirHandle(const std::string& _path)
{
	path = _path;
	open(path);
}

DirHandle::~DirHandle()
{
	close();
}

bool DirHandle::isGood()
{
	return pdir == NULL && pdirent == NULL;
}

std::string DirHandle::next(const std::string& filter)
{
	std::string name = "";
	std::string sub = "";
	while (sub != filter)
	{
		try
		{
			name = next();
			sub = name.substr(name.length() - filter.length());
			if (name == "NULL")
			{
				return "";
			}
		}
		catch (std::out_of_range oor)
		{
		}
	}
	return name;
}

std::string DirHandle::next()
{
	pdirent = readdir(pdir);
	if (pdirent == NULL)
		return "NULL";
	return pdirent->d_name;
}

bool DirHandle::open(const std::string& path)
{
	pdir = opendir(path.c_str());
	return pdir != NULL;
}

bool DirHandle::close()
{
	if (pdir != NULL)
	{
		closedir(pdir);
		return true;
	}
	return false;
}