temporaryfile.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// TemporaryFile.cpp
//
// $Id: //poco/Main/Foundation/src/TemporaryFile.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/TemporaryFile.h"
#include "Foundation/Path.h"
#include "Foundation/Exception.h"
#include "Foundation/Process.h"
#include "Foundation/Mutex.h"
#include <set>
#include <sstream>


Foundation_BEGIN


class TempFileCollector
{
public:
	TempFileCollector()
	{
	}
	
	~TempFileCollector()
	{
		for (std::set<std::string>::iterator it = _files.begin(); it != _files.end(); ++it)
		{
			try
			{
				File f(*it);
				f.remove(true);
			}
			catch (Exception&)
			{
			}
		}
	}
	
	void registerFile(const std::string& path)
	{
		FastMutex::ScopedLock lock(_mutex);

		Path p(path);
		_files.insert(p.absolute().toString());
	}
	
private:
	std::set<std::string> _files;
	FastMutex             _mutex;
};


TemporaryFile::TemporaryFile(): File(tempName()), _keep(false)
{
}


TemporaryFile::~TemporaryFile()
{
	if (!_keep)
	{
		try
		{
			remove(true);
		}
		catch (Exception&)
		{
		}
	}
}


void TemporaryFile::keep()
{
	_keep = true;
}

	
void TemporaryFile::keepUntilExit()
{
	_keep = true;
	registerForDeletion(path());
}


void TemporaryFile::registerForDeletion(const std::string& path)
{
	static TempFileCollector fc;
	fc.registerFile(path);
}


std::string TemporaryFile::tempName()
{
	std::ostringstream name;
	static FastMutex mutex;
	static unsigned long count = 0;
	mutex.lock();
	unsigned long n = count++;
	mutex.unlock();
	name << Path::temp();
	name << "tmp" << Process::id();
	for (int i = 0; i < 6; ++i)
	{
		name << char('a' + (n % 26));
		n /= 26;
	}
	return name.str();
}


Foundation_END